Page MenuHomeClusterLabs Projects
Files F3155424

No OneTemporary
Actions

View Options

diff --git a/libknet/libknet.h b/libknet/libknet.h
index 2644cf2b..61eae54d 100644
--- a/libknet/libknet.h
+++ b/libknet/libknet.h
@@ -1,1491 +1,1504 @@
/*
* Copyright (C) 2010-2015 Red Hat, Inc. All rights reserved.
*
* Authors: Fabio M. Di Nitto <fabbione@kronosnet.org>
* Federico Simoncelli <fsimon@kronosnet.org>
*
* This software licensed under GPL-2.0+, LGPL-2.0+
*/
#ifndef __LIBKNET_H__
#define __LIBKNET_H__
#include <stdint.h>
#include <time.h>
#include <netinet/in.h>
/*
* libknet limits
*/
/*
* Maximum number of hosts
*/
typedef uint16_t knet_node_id_t;
#define KNET_MAX_HOST 65536
/*
* Maximum number of links between 2 hosts
*/
#define KNET_MAX_LINK 8
/*
* Maximum packet size that should be written to datafd
* see knet_handle_new for details
*/
#define KNET_MAX_PACKET_SIZE 65536
/*
* Buffers used for pretty logging
* host is used to store both ip addresses and hostnames
*/
#define KNET_MAX_HOST_LEN 256
#define KNET_MAX_PORT_LEN 6
/*
* Some notifications can be generated either on TX or RX
*/
#define KNET_NOTIFY_TX 0
#define KNET_NOTIFY_RX 1
+
+/*
+ * Link flags
+ */
+
+/*
+ * Where possible, set traffic priority to high.
+ * On Linux this sets the TOS to INTERACTIVE (6),
+ * see tc-prio(8) for more infomation
+ */
+#define KNET_LINK_FLAG_TRAFFICHIPRIO (1ULL << 0)
+
+
typedef struct knet_handle *knet_handle_t;
/*
* Handle structs/API calls
*/
/*
* knet_handle_new
*
* host_id - Each host in a knet is identified with a unique
* ID. when creating a new handle local host_id
* must be specified (0 to UINT16T_MAX are all valid).
* It is the user's responsibility to check that the value
* is unique, or bad things might happen.
*
* log_fd - Write file descriptor. If set to a value > 0, it will be used
* to write log packets (see below) from libknet to the application.
* Setting to 0 will disable logging from libknet.
* It is possible to enable logging at any given time (see logging API
* below).
* Make sure to either read from this filedescriptor properly and/or
* mark it O_NONBLOCK, otherwise if the fd becomes full, libknet could
* block.
*
* default_log_level -
* If logfd is specified, it will initialize all subsystems to log
* at default_log_level value. (see logging API below)
*
* on success, a new knet_handle_t is returned.
* on failure, NULL is returned and errno is set.
*/
knet_handle_t knet_handle_new(knet_node_id_t host_id,
int log_fd,
uint8_t default_log_level);
/*
* knet_handle_free
*
* knet_h - pointer to knet_handle_t
*
* Destroy a knet handle, free all resources
*
* knet_handle_free returns:
*
* 0 on success
* -1 on error and errno is set.
*/
int knet_handle_free(knet_handle_t knet_h);
/*
* knet_handle_enable_sock_notify
*
* knet_h - pointer to knet_handle_t
*
* sock_notify_fn_private_data
* void pointer to data that can be used to identify
* the callback.
*
* sock_notify_fn
* A callback function that is invoked every time
* a socket in the datafd pool will report an error (-1)
* or an end of read (0) (see socket.7).
* This function MUST NEVER block or add substantial delays.
* The callback is invoked in an internal unlocked area
* to allow calls to knet_handle_add_datafd/knet_handle_remove_datafd
* to swap/replace the bad fd.
* if both err and errno are 0, it means that the socket
* has received a 0 byte packet (EOF?).
* The callback function must either remove the fd from knet
* (by calling knet_handle_remove_fd()) or dup a new fd in its place.
* Failure to do this can cause problems.
*
* knet_handle_enable_sock_notify returns:
*
* 0 on success
* -1 on error and errno is set.
*/
int knet_handle_enable_sock_notify(knet_handle_t knet_h,
void *sock_notify_fn_private_data,
void (*sock_notify_fn) (
void *private_data,
int datafd,
int8_t channel,
uint8_t tx_rx,
int error,
int errorno)); /* sorry! can't call it errno ;) */
/*
* knet_handle_add_datafd
*
* IMPORTANT: In order to add datafd to knet, knet_handle_enable_sock_notify
* _MUST_ be set and be able to handle both errors (-1) and
* 0 bytes read / write from the provided datafd.
* On read error (< 0) from datafd, the socket is automatically
* removed from polling to avoid spinning on dead sockets.
* It is safe to call knet_handle_remove_datafd even on sockets
* that have been removed.
*
* knet_h - pointer to knet_handle_t
*
* *datafd - read/write file descriptor.
* knet will read data here to send to the other hosts
* and will write data received from the network.
* Each data packet can be of max size KNET_MAX_PACKET_SIZE!
* Applications using knet_send/knet_recv will receive a
* proper error if the packet size is not within boundaries.
* Applications using their own functions to write to the
* datafd should NOT write more than KNET_MAX_PACKET_SIZE.
*
* Please refer to handle.c on how to set up a socketpair.
*
* datafd can be 0, and knet_handle_add_datafd will create a properly
* populated socket pair the same way as ping_test, or a value
* higher than 0. A negative number will return an error.
* On exit knet_handle_free will take care to cleanup the
* socketpair only if they have been created by knet_handle_add_datafd.
*
* It is possible to pass either sockets or normal fds.
* User provided datafd will be marked as non-blocking and close-on-exit.
*
* *channel - This value has the same effect of VLAN tagging.
* A negative value will auto-allocate a channel.
* Setting a value between 0 and 31 will try to allocate that
* specific channel (unless already in use).
*
* It is possible to add up to 32 datafds but be aware that each
* one of them must have a receiving end on the other host.
*
* Example:
* hostA channel 0 will be delivered to datafd on hostB channel 0
* hostA channel 1 to hostB channel 1.
*
* Each channel must have a unique file descriptor.
*
* If your application could have 2 channels on one host and one
* channel on another host, then you can use dst_host_filter
* to manipulate channel values on TX and RX.
*
* knet_handle_add_datafd returns:
*
* 0 on success
* *datafd will be populated with a socket if the original value was 0
* or if a specific fd was set, the value is untouched.
* *channel will be populated with a channel number if the original value
* was negative or the value is untouched if a specific channel
* was requested.
*
* -1 on error and errno is set.
* *datafd and *channel are untouched or empty.
*/
#define KNET_DATAFD_MAX 32
int knet_handle_add_datafd(knet_handle_t knet_h, int *datafd, int8_t *channel);
/*
* knet_handle_remove_datafd
*
* knet_h - pointer to knet_handle_t
*
* datafd - file descriptor to remove.
* NOTE that if the socket/fd was created by knet_handle_add_datafd,
* the socket will be closed by libknet.
*
* knet_handle_remove_datafd returns:
*
* 0 on success
*
* -1 on error and errno is set.
*/
int knet_handle_remove_datafd(knet_handle_t knet_h, int datafd);
/*
* knet_handle_get_channel
*
* knet_h - pointer to knet_handle_t
*
* datafd - get the channel associated to this datafd
*
* *channel - will contain the result
*
* knet_handle_get_channel returns:
*
* 0 on success
* and *channel will contain the result
*
* -1 on error and errno is set.
* and *channel content is meaningless
*/
int knet_handle_get_channel(knet_handle_t knet_h, const int datafd, int8_t *channel);
/*
* knet_handle_get_datafd
*
* knet_h - pointer to knet_handle_t
*
* channel - get the datafd associated to this channel
*
* *datafd - will contain the result
*
* knet_handle_get_datafd returns:
*
* 0 on success
* and *datafd will contain the results
*
* -1 on error and errno is set.
* and *datafd content is meaningless
*/
int knet_handle_get_datafd(knet_handle_t knet_h, const int8_t channel, int *datafd);
/*
* knet_recv
*
* knet_h - pointer to knet_handle_t
*
* buff - pointer to buffer to store the received data
*
* buff_len - buffer lenght
*
* knet_recv is a commodity function to wrap iovec operations
* around a socket. It returns a call to readv(2).
*/
ssize_t knet_recv(knet_handle_t knet_h,
char *buff,
const size_t buff_len,
const int8_t channel);
/*
* knet_send
*
* knet_h - pointer to knet_handle_t
*
* buff - pointer to the buffer of data to send
*
* buff_len - length of data to send
*
* knet_send is a commodity function to wrap iovec operations
* around a socket. It returns a call to writev(2).
*/
ssize_t knet_send(knet_handle_t knet_h,
const char *buff,
const size_t buff_len,
const int8_t channel);
/*
* knet_send_sync
*
* knet_h - pointer to knet_handle_t
*
* buff - pointer to the buffer of data to send
*
* buff_len - length of data to send
*
* channel - data channel to use (see knet_handle_add_datafd)
*
* All knet RX/TX operations are async for performance reasons.
* There are applications that might need a sync version of data
* transmission and receive errors in case of failure to deliver
* to another host.
* knet_send_sync bypasses the whole TX async layer and delivers
* data directly to the link layer, and returns errors accordingly.
* knet_send_sync allows to send only one packet to one host at
* a time. It does NOT support multiple destinations or multicast
* packets. Decision is still based on dst_host_filter_fn.
*
* knet_send_sync returns 0 on success and -1 on error.
*
* In addition to normal sendmmsg errors, knet_send_sync can fail
* due to:
*
* ECANCELED - data forward is disabled
* EFAULT - dst_host_filter fatal error
* EINVAL - dst_host_filter did not provide
* dst_host_ids_entries on unicast pckts
* E2BIG - dst_host_filter did return more than one
* dst_host_ids_entries on unicast pckts
* ENOMSG - received unknown message type
* EHOSTDOWN - unicast pckt cannot be delivered because
* dest host is not connected yet
* ECHILD - crypto failed
* EAGAIN - sendmmsg was unable to send all messages and
* there was no progress during retry
*/
int knet_send_sync(knet_handle_t knet_h,
const char *buff,
const size_t buff_len,
const int8_t channel);
/*
* knet_handle_enable_filter
*
* knet_h - pointer to knet_handle_t
*
* dst_host_filter_fn_private_data
* void pointer to data that can be used to identify
* the callback.
*
* dst_host_filter_fn -
* is a callback function that is invoked every time
* a packet hits datafd (see knet_handle_new).
* the function allows users to tell libknet where the
* packet has to be delivered.
*
* const unsigned char *outdata - is a pointer to the
* current packet
* ssize_t outdata_len - lenght of the above data
* uint8_t tx_rx - filter is called on tx or rx
* (see defines below)
* knet_node_id_t this_host_id - host_id processing the packet
* knet_node_id_t src_host_id - host_id that generated the
* packet
* knet_node_id_t *dst_host_ids - array of KNET_MAX_HOST knet_node_id_t
* where to store the destinations
* size_t *dst_host_ids_entries - number of hosts to send the message
*
* dst_host_filter_fn should return
* -1 on error, packet is discarded.
* 0 packet is unicast and should be sent to dst_host_ids and there are
* dst_host_ids_entries in the buffer.
* 1 packet is broadcast/multicast and is sent all hosts.
* contents of dst_host_ids and dst_host_ids_entries are ignored.
* (see also kronosnetd/etherfilter.* for an example that filters based
* on ether protocol)
*
* knet_handle_enable_filter returns:
*
* 0 on success
* -1 on error and errno is set.
*/
int knet_handle_enable_filter(knet_handle_t knet_h,
void *dst_host_filter_fn_private_data,
int (*dst_host_filter_fn) (
void *private_data,
const unsigned char *outdata,
ssize_t outdata_len,
uint8_t tx_rx,
knet_node_id_t this_host_id,
knet_node_id_t src_host_id,
int8_t *channel,
knet_node_id_t *dst_host_ids,
size_t *dst_host_ids_entries));
/*
* knet_handle_setfwd
*
* knet_h - pointer to knet_handle_t
*
* enable - set to 1 to allow data forwarding, 0 to disable data forwarding.
*
* knet_handle_setfwd returns:
*
* 0 on success
* -1 on error and errno is set.
*
* By default data forwarding is off and no traffic will pass through knet until
* it is set on.
*/
int knet_handle_setfwd(knet_handle_t knet_h, unsigned int enabled);
/*
* knet_handle_pmtud_setfreq
*
* knet_h - pointer to knet_handle_t
*
* interval - define the interval in seconds between PMTUd scans
* range from 1 to 86400 (24h)
*
* knet_handle_pmtud_setfreq returns:
*
* 0 on success
* -1 on error and errno is set.
*
* default interval is 60.
*/
#define KNET_PMTUD_DEFAULT_INTERVAL 60
int knet_handle_pmtud_setfreq(knet_handle_t knet_h, unsigned int interval);
/*
* knet_handle_pmtud_getfreq
*
* knet_h - pointer to knet_handle_t
*
* interval - pointer where to store the current interval value
*
* knet_handle_pmtud_setfreq returns:
*
* 0 on success
* -1 on error and errno is set.
*/
int knet_handle_pmtud_getfreq(knet_handle_t knet_h, unsigned int *interval);
/*
* knet_handle_enable_pmtud_notify
*
* knet_h - pointer to knet_handle_t
*
* pmtud_notify_fn_private_data
* void pointer to data that can be used to identify
* the callback.
*
* pmtud_notify_fn
* is a callback function that is invoked every time
* a path MTU size change is detected.
* The function allows libknet to notify the user
* of data MTU, that's the max value that can be send
* onwire without fragmentation. The data MTU will always
* be lower than real link MTU because it accounts for
* protocol overhead, knet packet header and (if configured)
* crypto overhead,
* This function MUST NEVER block or add substantial delays.
*
* knet_handle_enable_pmtud_notify returns:
*
* 0 on success
* -1 on error and errno is set.
*/
int knet_handle_enable_pmtud_notify(knet_handle_t knet_h,
void *pmtud_notify_fn_private_data,
void (*pmtud_notify_fn) (
void *private_data,
unsigned int data_mtu));
/*
* knet_handle_pmtud_get
*
* knet_h - pointer to knet_handle_t
*
* data_mtu - pointer where to store data_mtu (see above)
*
* knet_handle_pmtud_get returns:
*
* 0 on success
* -1 on error and errno is set.
*/
int knet_handle_pmtud_get(knet_handle_t knet_h,
unsigned int *data_mtu);
/*
* knet_handle_crypto
*
* knet_h - pointer to knet_handle_t
*
* knet_handle_crypto_cfg -
* pointer to a knet_handle_crypto_cfg structure
*
* crypto_model should contain the model name.
* Currently only "nss" is supported.
* Setting to "none" will disable crypto.
*
* crypto_cipher_type
* should contain the cipher algo name.
* It can be set to "none" to disable
* encryption.
* Currently supported by "nss" model:
* "3des", "aes128", "aes192" and "aes256".
*
* crypto_hash_type
* should contain the hashing algo name.
* It can be set to "none" to disable
* hashing.
* Currently supported by "nss" model:
* "md5", "sha1", "sha256", "sha384" and "sha512".
*
* private_key will contain the private shared key.
* It has to be at least KNET_MIN_KEY_LEN long.
*
* private_key_len
* length of the provided private_key.
*
* Implementation notes/current limitations:
* - enabling crypto, will increase latency as packets have
* to processed.
* - enabling crypto might reduce the overall throughtput
* due to crypto data overhead.
* - re-keying is not implemented yet.
* - private/public key encryption/hashing is not currently
* planned.
* - crypto key must be the same for all hosts in the same
* knet instance.
* - it is safe to call knet_handle_crypto multiple times at runtime.
* The last config will be used.
* IMPORTANT: a call to knet_handle_crypto can fail due to:
* 1) failure to obtain locking
* 2) errors to initializing the crypto level.
* This can happen even in subsequent calls to knet_handle_crypto.
* A failure in crypto init, might leave your traffic unencrypted!
* It's best to stop data forwarding (see above), change crypto config,
* start forward again.
*
* knet_handle_crypto returns:
*
* 0 on success
* -1 on error and errno is set.
* -2 on crypto subsystem initialization error. No errno is provided at the moment (yet).
*/
#define KNET_MIN_KEY_LEN 1024
#define KNET_MAX_KEY_LEN 4096
struct knet_handle_crypto_cfg {
char crypto_model[16];
char crypto_cipher_type[16];
char crypto_hash_type[16];
unsigned char private_key[KNET_MAX_KEY_LEN];
unsigned int private_key_len;
};
int knet_handle_crypto(knet_handle_t knet_h,
struct knet_handle_crypto_cfg *knet_handle_crypto_cfg);
/*
* host structs/API calls
*/
/*
* knet_host_add
*
* knet_h - pointer to knet_handle_t
*
* host_id - each host in a knet is identified with a unique ID
* (see also knet_handle_new documentation above)
*
* knet_host_add returns:
*
* 0 on success
* -1 on error and errno is set.
*/
int knet_host_add(knet_handle_t knet_h, knet_node_id_t host_id);
/*
* knet_host_remove
*
* knet_h - pointer to knet_handle_t
*
* host_id - each host in a knet is identified with a unique ID
* (see also knet_handle_new documentation above)
*
* knet_host_remove returns:
*
* 0 on success
* -1 on error and errno is set.
*/
int knet_host_remove(knet_handle_t knet_h, knet_node_id_t host_id);
/*
* knet_host_set_name
*
* knet_h - pointer to knet_handle_t
*
* host_id - see above
*
* name - this name will be used for pretty logging and eventually
* search for hosts (see also get_name and get_id below).
* Only up to KNET_MAX_HOST_LEN - 1 bytes will be accepted and
* name has to be unique for each host.
*
* knet_host_set_name returns:
*
* 0 on success
* -1 on error and errno is set.
*/
int knet_host_set_name(knet_handle_t knet_h, knet_node_id_t host_id,
const char *name);
/*
* knet_host_get_name_by_host_id
*
* knet_h - pointer to knet_handle_t
*
* host_id - see above
*
* name - pointer to a preallocated buffer of at least size KNET_MAX_HOST_LEN
* where the current host name will be stored
* (as set by knet_host_set_name or default by knet_host_add)
*
* knet_host_get_name_by_host_id returns:
*
* 0 on success
* -1 on error and errno is set (name is left untouched)
*/
int knet_host_get_name_by_host_id(knet_handle_t knet_h, knet_node_id_t host_id,
char *name);
/*
* knet_host_get_id_by_host_name
*
* knet_h - pointer to knet_handle_t
*
* name - name to lookup, max len KNET_MAX_HOST_LEN
*
* host_id - where to store the result
*
* knet_host_get_id_by_host_name returns:
*
* 0 on success
* -1 on error and errno is set.
*/
int knet_host_get_id_by_host_name(knet_handle_t knet_h, const char *name,
knet_node_id_t *host_id);
/*
* knet_host_get_host_list
*
* knet_h - pointer to knet_handle_t
*
* host_ids - array of at lest KNET_MAX_HOST size
*
* host_ids_entries -
* number of entries writted in host_ids
*
* knet_host_get_host_list returns:
*
* 0 on success
* -1 on error and errno is set.
*/
int knet_host_get_host_list(knet_handle_t knet_h,
knet_node_id_t *host_ids, size_t *host_ids_entries);
/*
* define switching policies
*/
#define KNET_LINK_POLICY_PASSIVE 0
#define KNET_LINK_POLICY_ACTIVE 1
#define KNET_LINK_POLICY_RR 2
/*
* knet_host_set_policy
*
* knet_h - pointer to knet_handle_t
*
* host_id - see above
*
* policy - there are currently 3 kind of simple switching policies
* as defined above, based on link configuration.
* KNET_LINK_POLICY_PASSIVE - the active link with the lowest
* priority will be used.
* if one or more active links share
* the same priority, the one with
* lowest link_id will be used.
*
* KNET_LINK_POLICY_ACTIVE - all active links will be used
* simultaneously to send traffic.
* link priority is ignored.
*
* KNET_LINK_POLICY_RR - round-robin policy, every packet
* will be send on a different active
* link.
*
* knet_host_set_policy returns:
*
* 0 on success
* -1 on error and errno is set.
*/
int knet_host_set_policy(knet_handle_t knet_h, knet_node_id_t host_id,
uint8_t policy);
/*
* knet_host_get_policy
*
* knet_h - pointer to knet_handle_t
*
* host_id - see above
*
* policy - will contain the current configured switching policy.
* Default is passive when creating a new host.
*
* knet_host_get_policy returns:
*
* 0 on success
* -1 on error and errno is set.
*/
int knet_host_get_policy(knet_handle_t knet_h, knet_node_id_t host_id,
uint8_t *policy);
/*
* knet_host_enable_status_change_notify
*
* knet_h - pointer to knet_handle_t
*
* host_status_change_notify_fn_private_data
* void pointer to data that can be used to identify
* the callback.
*
* host_status_change_notify_fn
* is a callback function that is invoked every time
* there is a change in the host status.
* host status is identified by:
* - reachable, this host can send/receive data to/from host_id
* - remote, 0 if the host_id is connected locally or 1 if
* the there is one or more knet host(s) in between.
* NOTE: re-switching is NOT currently implemented,
* but this is ready for future and can avoid
* an API/ABI breakage later on.
* - external, 0 if the host_id is configured locally or 1 if
* it has been added from remote nodes config.
* NOTE: dynamic topology is NOT currently implemented,
* but this is ready for future and can avoid
* an API/ABI breakage later on.
* This function MUST NEVER block or add substantial delays.
*
* knet_host_status_change_notify returns:
*
* 0 on success
* -1 on error and errno is set.
*/
int knet_host_enable_status_change_notify(knet_handle_t knet_h,
void *host_status_change_notify_fn_private_data,
void (*host_status_change_notify_fn) (
void *private_data,
knet_node_id_t host_id,
uint8_t reachable,
uint8_t remote,
uint8_t external));
/*
* define host status structure for quick lookup
* struct is in flux as more stats will be added soon
*
* reachable host_id can be seen either directly connected
* or via another host_id
*
* remote 0 = node is connected locally, 1 is visible via
* via another host_id
*
* external 0 = node is configured/known locally,
* 1 host_id has been received via another host_id
*/
struct knet_host_status {
uint8_t reachable;
uint8_t remote;
uint8_t external;
/* add host statistics */
};
/*
* knet_host_status_get
*
* knet_h - pointer to knet_handle_t
*
* status - pointer to knet_host_status struct (see above)
*
* knet_handle_pmtud_get returns:
*
* 0 on success
* -1 on error and errno is set.
*/
int knet_host_get_status(knet_handle_t knet_h, knet_node_id_t host_id,
struct knet_host_status *status);
/*
* link structs/API calls
*
* every host allocated/managed by knet_host_* has
* KNET_MAX_LINK structures to define the network
* paths that connect 2 hosts.
*
* Each link is identified by a link_id that has a
* values between 0 and KNET_MAX_LINK - 1.
*
* KNOWN LIMITATIONS:
*
* - let's assume the scenario where two hosts are connected
* with any number of links. link_id must match on both sides.
* If host_id 0 link_id 0 is configured to connect IP1 to IP2 and
* host_id 0 link_id 1 is configured to connect IP3 to IP4,
* host_id 1 link_id 0 _must_ connect IP2 to IP1 and likewise
* host_id 1 link_id 1 _must_ connect IP4 to IP3.
* We might be able to lift this restriction in future, by using
* other data to determine src/dst link_id, but for now, deal with it.
*
* -
*/
/*
* commodity functions to convert strings to sockaddr and viceversa
*/
/*
* knet_strtoaddr
*
* host - IPaddr/hostname to convert
* be aware only the first IP address will be returned
* in case a hostname resolves to multiple IP
*
* port - port to connect to
*
* ss - sockaddr_storage where to store the converted data
*
* sslen - len of the sockaddr_storage
*
* knet_strtoaddr returns same error codes as getaddrinfo
*
*/
int knet_strtoaddr(const char *host, const char *port,
struct sockaddr_storage *ss, socklen_t sslen);
/*
* knet_addrtostr
*
* ss - sockaddr_storage to convert
*
* sslen - len of the sockaddr_storage
*
* host - IPaddr/hostname where to store data
* (recommended size: KNET_MAX_HOST_LEN)
*
* port - port buffer where to store data
* (recommended size: KNET_MAX_PORT_LEN)
*
* knet_strtoaddr returns same error codes as getnameinfo
*
*/
int knet_addrtostr(const struct sockaddr_storage *ss, socklen_t sslen,
char *addr_buf, size_t addr_buf_size,
char *port_buf, size_t port_buf_size);
/*
* knet_handle_get_transport_list
*
* knet_h - pointer to knet_handle_t
*
* transport_list - an array of struct transport_info that must be
* at least of size struct transport_info * KNET_MAX_TRANSPORTS
*
* transport_list_entries - pointer to a size_t where to store how many transports
* are available in this build of libknet.
*
* knet_handle_get_transport_list returns:
*
* 0 on success
* -1 on error and errno is set.
*/
#define KNET_TRANSPORT_UDP 0
#define KNET_TRANSPORT_SCTP 1
#define KNET_MAX_TRANSPORTS 2
struct transport_info {
const char *name; /* UDP/SCTP/etc... */
uint8_t id; /* value that can be used for link_set_config */
uint8_t properties; /* currently unused */
};
int knet_handle_get_transport_list(knet_handle_t knet_h,
struct transport_info *transport_list, size_t *transport_list_entries);
/*
* knet_handle_get_transport_name_by_id
*
* knet_h - pointer to knet_handle_t
*
* transport - one of the above KNET_TRANSPORT_xxx constants
*
* knet_handle_get_transport_name_by_id returns:
*
* pointer to the name on success or
* NULL on error and errno is set.
*/
const char *knet_handle_get_transport_name_by_id(knet_handle_t knet_h, uint8_t transport);
/*
* knet_handle_get_transport_id_by_name
*
* knet_h - pointer to knet_handle_t
*
* name - transport name (UDP/SCTP/etc)
*
* knet_handle_get_transport_name_by_id returns:
*
* KNET_MAX_TRANSPORTS on error and errno is set accordingly
* KNET_TRANSPORT_xxx on success.
*/
uint8_t knet_handle_get_transport_id_by_name(knet_handle_t knet_h, const char *name);
/*
* knet_handle_set_transport_reconnect_interval
*
* knet_h - pointer to knet_handle_t
*
* msecs - milliseconds
*
* knet_handle_set_transport_reconnect_interval returns:
*
* 0 on success
* -1 on error and errno is set.
*/
#define KNET_TRANSPORT_DEFAULT_RECONNECT_INTERVAL 1000
int knet_handle_set_transport_reconnect_interval(knet_handle_t knet_h, uint32_t msecs);
/*
* knet_handle_get_transport_reconnect_interval
*
* knet_h - pointer to knet_handle_t
*
* msecs - milliseconds
*
* knet_handle_get_transport_reconnect_interval returns:
*
* 0 on success
* -1 on error and errno is set.
*/
int knet_handle_get_transport_reconnect_interval(knet_handle_t knet_h, uint32_t *msecs);
/*
* knet_link_set_config
*
* knet_h - pointer to knet_handle_t
*
* host_id - see above
*
* link_id - see above
*
* transport - one of the above KNET_TRANSPORT_xxx constants
*
* src_addr - sockaddr_storage that can be either IPv4 or IPv6
*
* dst_addr - sockaddr_storage that can be either IPv4 or IPv6
* this can be null if we don't know the incoming
* IP address/port and the link will remain quiet
* till the node on the other end will initiate a
* connection
*
* flags - KNET_LINK_FLAG_*
*
* knet_link_set_config returns:
*
* 0 on success
* -1 on error and errno is set.
*/
int knet_link_set_config(knet_handle_t knet_h, knet_node_id_t host_id, uint8_t link_id,
uint8_t transport,
struct sockaddr_storage *src_addr,
struct sockaddr_storage *dst_addr,
uint64_t flags);
/*
* knet_link_get_config
*
* knet_h - pointer to knet_handle_t
*
* host_id - see above
*
* link_id - see above
*
* transport - see above
*
* src_addr - sockaddr_storage that can be either IPv4 or IPv6
*
* dst_addr - sockaddr_storage that can be either IPv4 or IPv6
*
* dynamic - 0 if dst_addr is static or 1 if dst_addr is dynamic.
* In case of 1, dst_addr can be NULL and it will be left
* untouched.
*
* flags - KNET_LINK_FLAG_*
*
* knet_link_get_config returns:
*
* 0 on success.
* -1 on error and errno is set.
*/
int knet_link_get_config(knet_handle_t knet_h, knet_node_id_t host_id, uint8_t link_id,
uint8_t *transport,
struct sockaddr_storage *src_addr,
struct sockaddr_storage *dst_addr,
uint8_t *dynamic,
uint64_t *flags);
/*
* knet_link_clear_config
*
* knet_h - pointer to knet_handle_t
*
* host_id - see above
*
* link_id - see above
*
* knet_link_clear_config returns:
*
* 0 on success.
* -1 on error and errno is set.
*/
int knet_link_clear_config(knet_handle_t knet_h, knet_node_id_t host_id, uint8_t link_id);
/*
* knet_link_set_enable
*
* knet_h - pointer to knet_handle_t
*
* host_id - see above
*
* link_id - see above
*
* enabled - 0 disable the link, 1 enable the link
*
* knet_link_set_enable returns:
*
* 0 on success
* -1 on error and errno is set.
*/
int knet_link_set_enable(knet_handle_t knet_h, knet_node_id_t host_id, uint8_t link_id,
unsigned int enabled);
/*
* knet_link_get_enable
*
* knet_h - pointer to knet_handle_t
*
* host_id - see above
*
* link_id - see above
*
* enabled - 0 disable the link, 1 enable the link
*
* knet_link_get_enable returns:
*
* 0 on success
* -1 on error and errno is set.
*/
int knet_link_get_enable(knet_handle_t knet_h, knet_node_id_t host_id, uint8_t link_id,
unsigned int *enabled);
/*
* knet_link_set_ping_timers
*
* knet_h - pointer to knet_handle_t
*
* host_id - see above
*
* link_id - see above
*
* interval - specify the ping interval
*
* timeout - if no pong is received within this time,
* the link is declared dead
*
* precision - how many values of latency are used to calculate
* the average link latency (see also get_status below)
*
* knet_link_set_ping_timers returns:
*
* 0 on success
* -1 on error and errno is set.
*/
#define KNET_LINK_DEFAULT_PING_INTERVAL 1000 /* 1 second */
#define KNET_LINK_DEFAULT_PING_TIMEOUT 2000 /* 2 seconds */
#define KNET_LINK_DEFAULT_PING_PRECISION 2048 /* samples */
int knet_link_set_ping_timers(knet_handle_t knet_h, knet_node_id_t host_id, uint8_t link_id,
time_t interval, time_t timeout, unsigned int precision);
/*
* knet_link_get_ping_timers
*
* knet_h - pointer to knet_handle_t
*
* host_id - see above
*
* link_id - see above
*
* interval - ping intervall
*
* timeout - if no pong is received within this time,
* the link is declared dead
*
* precision - how many values of latency are used to calculate
* the average link latency (see also get_status below)
*
* knet_link_get_ping_timers returns:
*
* 0 on success
* -1 on error and errno is set.
*/
int knet_link_get_ping_timers(knet_handle_t knet_h, knet_node_id_t host_id, uint8_t link_id,
time_t *interval, time_t *timeout, unsigned int *precision);
/*
* knet_link_set_pong_count
*
* knet_h - pointer to knet_handle_t
*
* host_id - see above
*
* link_id - see above
*
* pong_count - how many valid ping/pongs before a link is marked UP.
* default: 5, value should be > 0
*
* knet_link_set_pong_count returns:
*
* 0 on success
* -1 on error and errno is set.
*/
#define KNET_LINK_DEFAULT_PONG_COUNT 5
int knet_link_set_pong_count(knet_handle_t knet_h, knet_node_id_t host_id, uint8_t link_id,
uint8_t pong_count);
/*
* knet_link_get_pong_count
*
* knet_h - pointer to knet_handle_t
*
* host_id - see above
*
* link_id - see above
*
* pong_count - see above
*
* knet_link_get_pong_count returns:
*
* 0 on success
* -1 on error and errno is set.
*/
int knet_link_get_pong_count(knet_handle_t knet_h, knet_node_id_t host_id, uint8_t link_id,
uint8_t *pong_count);
/*
* knet_link_set_priority
*
* knet_h - pointer to knet_handle_t
*
* host_id - see above
*
* link_id - see above
*
* priority - specify the switching priority for this link
* see also knet_host_set_policy
*
* knet_link_set_priority returns:
*
* 0 on success
* -1 on error and errno is set.
*/
int knet_link_set_priority(knet_handle_t knet_h, knet_node_id_t host_id, uint8_t link_id,
uint8_t priority);
/*
* knet_link_get_priority
*
* knet_h - pointer to knet_handle_t
*
* host_id - see above
*
* link_id - see above
*
* priority - gather the switching priority for this link
* see also knet_host_set_policy
*
* knet_link_get_priority returns:
*
* 0 on success
* -1 on error and errno is set.
*/
int knet_link_get_priority(knet_handle_t knet_h, knet_node_id_t host_id, uint8_t link_id,
uint8_t *priority);
/*
* knet_link_get_link_list
*
* knet_h - pointer to knet_handle_t
*
* link_ids - array of at lest KNET_MAX_LINK size
* with the list of configured links for a certain host.
*
* link_ids_entries -
* number of entries contained in link_ids
*
* knet_link_get_link_list returns:
*
* 0 on success
* -1 on error and errno is set.
*/
int knet_link_get_link_list(knet_handle_t knet_h, knet_node_id_t host_id,
uint8_t *link_ids, size_t *link_ids_entries);
/*
* define link status structure for quick lookup
* struct is in flux as more stats will be added soon
*
* src/dst_{ipaddr,port} strings are filled by
* getnameinfo(3) when configuring the link.
* if the link is dynamic (see knet_link_set_config)
* dst_ipaddr/port will contain ipaddr/port of the currently
* connected peer or "Unknown" if it was not possible
* to determine the ipaddr/port at runtime.
*
* enabled see also knet_link_set/get_enable.
*
* connected the link is connected to a peer and ping/pong traffic
* is flowing.
*
* dynconnected the link has dynamic ip on the other end, and
* we can see the other host is sending pings to us.
*
* latency average latency of this link
* see also knet_link_set/get_timeout.
*
* pong_last if the link is down, this value tells us how long
* ago this link was active. A value of 0 means that the link
* has never been active.
*/
struct knet_link_status {
char src_ipaddr[KNET_MAX_HOST_LEN];
char src_port[KNET_MAX_PORT_LEN];
char dst_ipaddr[KNET_MAX_HOST_LEN];
char dst_port[KNET_MAX_PORT_LEN];
unsigned int enabled:1; /* link is configured and admin enabled for traffic */
unsigned int connected:1; /* link is connected for data (local view) */
unsigned int dynconnected:1; /* link has been activated by remote dynip */
unsigned long long latency; /* average latency computed by fix/exp */
struct timespec pong_last;
unsigned int mtu; /* current detected MTU on this link */
unsigned int proto_overhead; /* contains the size of the IP protocol, knet headers and
* crypto headers (if configured). This value is filled in
* ONLY after the first PMTUd run on that given link,
* and can change if link configuration or crypto configuration
* changes at runtime.
* WARNING: in general mtu + proto_overhead might or might
* not match the output of ifconfig mtu due to crypto
* requirements to pad packets to some specific boundaries. */
/* add link statistics */
};
/*
* knet_link_get_status
*
* knet_h - pointer to knet_handle_t
*
* host_id - see above
*
* link_id - see above
*
* status - pointer to knet_link_status struct (see above)
*
* knet_link_get_status returns:
*
* 0 on success
* -1 on error and errno is set.
*/
int knet_link_get_status(knet_handle_t knet_h, knet_node_id_t host_id, uint8_t link_id,
struct knet_link_status *status);
/*
* logging structs/API calls
*/
/*
* libknet is composed of several subsystems. In order
* to easily distinguish log messages coming from different
* places, each subsystem has its own ID.
*
* 0-19 config/management
* 20-39 internal threads
* 40-59 transports
* 60-69 crypto implementations
*/
#define KNET_SUB_COMMON 0 /* common.c */
#define KNET_SUB_HANDLE 1 /* handle.c alloc/dealloc config changes */
#define KNET_SUB_HOST 2 /* host add/del/modify */
#define KNET_SUB_LISTENER 3 /* listeners add/del/modify... */
#define KNET_SUB_LINK 4 /* link add/del/modify */
#define KNET_SUB_TRANSPORT 5 /* Transport common */
#define KNET_SUB_CRYPTO 6 /* crypto.c config generic layer */
#define KNET_SUB_FILTER 19 /* allocated for users to log from dst_filter */
#define KNET_SUB_DSTCACHE 20 /* switching thread (destination cache handling) */
#define KNET_SUB_HEARTBEAT 21 /* heartbeat thread */
#define KNET_SUB_PMTUD 22 /* Path MTU Discovery thread */
#define KNET_SUB_TX 23 /* send to link thread */
#define KNET_SUB_RX 24 /* recv from link thread */
#define KNET_SUB_TRANSP_UDP 40 /* UDP Transport */
#define KNET_SUB_TRANSP_SCTP 41 /* SCTP Transport */
#define KNET_SUB_NSSCRYPTO 60 /* nsscrypto.c */
#define KNET_SUB_UNKNOWN 254
#define KNET_MAX_SUBSYSTEMS KNET_SUB_UNKNOWN + 1
/*
* Convert between subsystem IDs and names
*/
/*
* knet_log_get_subsystem_name
*
* return internal name of the subsystem or "common"
*/
const char *knet_log_get_subsystem_name(uint8_t subsystem);
/*
* knet_log_get_subsystem_id
*
* return internal ID of the subsystem or KNET_SUB_COMMON
*/
uint8_t knet_log_get_subsystem_id(const char *name);
/*
* 4 log levels are enough for everybody
*/
#define KNET_LOG_ERR 0 /* unrecoverable errors/conditions */
#define KNET_LOG_WARN 1 /* recoverable errors/conditions */
#define KNET_LOG_INFO 2 /* info, link up/down, config changes.. */
#define KNET_LOG_DEBUG 3
/*
* Convert between log level values and names
*/
/*
* knet_log_get_loglevel_name
*
* return internal name of the log level or "ERROR" for unknown values
*/
const char *knet_log_get_loglevel_name(uint8_t level);
/*
* knet_log_get_loglevel_id
*
* return internal log level ID or KNET_LOG_ERR for invalid names
*/
uint8_t knet_log_get_loglevel_id(const char *name);
/*
* every log message is composed by a text message (including a trailing \n)
* and message level/subsystem IDs.
* In order to make debugging easier it is possible to send those packets
* straight to stdout/stderr (see knet_bench.c stdout option).
*/
#define KNET_MAX_LOG_MSG_SIZE 256
struct knet_log_msg {
char msg[KNET_MAX_LOG_MSG_SIZE - (sizeof(uint8_t)*2)];
uint8_t subsystem; /* KNET_SUB_* */
uint8_t msglevel; /* KNET_LOG_* */
};
/*
* knet_log_set_log_level
*
* knet_h - same as above
*
* subsystem - same as above
*
* level - same as above
*
* knet_log_set_loglevel allows fine control of log levels by subsystem.
* See also knet_handle_new for defaults.
*
* knet_log_set_loglevel returns:
*
* 0 on success
* -1 on error and errno is set.
*/
int knet_log_set_loglevel(knet_handle_t knet_h, uint8_t subsystem,
uint8_t level);
/*
* knet_log_get_log_level
*
* knet_h - same as above
*
* subsystem - same as above
*
* level - same as above
*
* knet_log_get_loglevel returns:
*
* 0 on success
* -1 on error and errno is set.
*/
int knet_log_get_loglevel(knet_handle_t knet_h, uint8_t subsystem,
uint8_t *level);
#endif
diff --git a/libknet/tests/api_knet_link_get_config.c b/libknet/tests/api_knet_link_get_config.c
index 2349c0ca..571a92a6 100644
--- a/libknet/tests/api_knet_link_get_config.c
+++ b/libknet/tests/api_knet_link_get_config.c
@@ -1,338 +1,338 @@
/*
* Copyright (C) 2016 Red Hat, Inc. All rights reserved.
*
* Authors: Fabio M. Di Nitto <fabbione@kronosnet.org>
*
* This software licensed under GPL-2.0+, LGPL-2.0+
*/
#include "config.h"
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "libknet.h"
#include "internals.h"
#include "link.h"
#include "netutils.h"
#include "test-common.h"
static void test(void)
{
knet_handle_t knet_h;
int logfds[2];
struct sockaddr_storage src, dst, get_src, get_dst;
uint8_t dynamic = 0, transport = 0;
uint64_t flags;
memset(&src, 0, sizeof(struct sockaddr_storage));
if (knet_strtoaddr("127.0.0.1", "50000", &src, sizeof(struct sockaddr_storage)) < 0) {
printf("Unable to convert src to sockaddr: %s\n", strerror(errno));
exit(FAIL);
}
memset(&dst, 0, sizeof(struct sockaddr_storage));
if (knet_strtoaddr("127.0.0.1", "50001", &dst, sizeof(struct sockaddr_storage)) < 0) {
printf("Unable to convert dst to sockaddr: %s\n", strerror(errno));
exit(FAIL);
}
printf("Test knet_link_get_config incorrect knet_h\n");
memset(&get_src, 0, sizeof(struct sockaddr_storage));
memset(&get_dst, 0, sizeof(struct sockaddr_storage));
if ((!knet_link_get_config(NULL, 1, 0, &transport, &get_src, &get_dst, &dynamic, &flags)) || (errno != EINVAL)) {
printf("knet_link_get_config accepted invalid knet_h or returned incorrect error: %s\n", strerror(errno));
exit(FAIL);
}
setup_logpipes(logfds);
knet_h = knet_handle_new(1, logfds[1], KNET_LOG_DEBUG);
if (!knet_h) {
printf("knet_handle_new failed: %s\n", strerror(errno));
flush_logs(logfds[0], stdout);
close_logpipes(logfds);
exit(FAIL);
}
printf("Test knet_link_get_config with unconfigured host_id\n");
memset(&get_src, 0, sizeof(struct sockaddr_storage));
memset(&get_dst, 0, sizeof(struct sockaddr_storage));
if ((!knet_link_get_config(knet_h, 1, 0, &transport, &get_src, &get_dst, &dynamic, &flags)) || (errno != EINVAL)) {
printf("knet_link_get_config accepted invalid host_id or returned incorrect error: %s\n", strerror(errno));
knet_handle_free(knet_h);
flush_logs(logfds[0], stdout);
close_logpipes(logfds);
exit(FAIL);
}
flush_logs(logfds[0], stdout);
printf("Test knet_link_get_config with incorrect linkid\n");
if (knet_host_add(knet_h, 1) < 0) {
printf("Unable to add host_id 1: %s\n", strerror(errno));
knet_handle_free(knet_h);
flush_logs(logfds[0], stdout);
close_logpipes(logfds);
exit(FAIL);
}
memset(&get_src, 0, sizeof(struct sockaddr_storage));
memset(&get_dst, 0, sizeof(struct sockaddr_storage));
if ((!knet_link_get_config(knet_h, 1, KNET_MAX_LINK, &transport, &get_src, &get_dst, &dynamic, &flags)) || (errno != EINVAL)) {
printf("knet_link_get_config accepted invalid linkid or returned incorrect error: %s\n", strerror(errno));
knet_host_remove(knet_h, 1);
knet_handle_free(knet_h);
flush_logs(logfds[0], stdout);
close_logpipes(logfds);
exit(FAIL);
}
flush_logs(logfds[0], stdout);
printf("Test knet_link_get_config with incorrect src_addr\n");
memset(&get_src, 0, sizeof(struct sockaddr_storage));
memset(&get_dst, 0, sizeof(struct sockaddr_storage));
if ((!knet_link_get_config(knet_h, 1, 0, &transport, NULL, &get_dst, &dynamic, &flags)) || (errno != EINVAL)) {
printf("knet_link_get_config accepted invalid src_addr or returned incorrect error: %s\n", strerror(errno));
knet_host_remove(knet_h, 1);
knet_handle_free(knet_h);
flush_logs(logfds[0], stdout);
close_logpipes(logfds);
exit(FAIL);
}
flush_logs(logfds[0], stdout);
printf("Test knet_link_get_config with incorrect dynamic\n");
memset(&get_src, 0, sizeof(struct sockaddr_storage));
memset(&get_dst, 0, sizeof(struct sockaddr_storage));
if ((!knet_link_get_config(knet_h, 1, 0, &transport, &get_src, &get_dst, NULL, &flags)) || (errno != EINVAL)) {
printf("knet_link_get_config accepted invalid dynamic or returned incorrect error: %s\n", strerror(errno));
knet_host_remove(knet_h, 1);
knet_handle_free(knet_h);
flush_logs(logfds[0], stdout);
close_logpipes(logfds);
exit(FAIL);
}
flush_logs(logfds[0], stdout);
printf("Test knet_link_get_config with unconfigured link\n");
memset(&get_src, 0, sizeof(struct sockaddr_storage));
memset(&get_dst, 0, sizeof(struct sockaddr_storage));
if ((!knet_link_get_config(knet_h, 1, 0, &transport, &get_src, &get_dst, &dynamic, &flags)) || (errno != EINVAL)) {
printf("knet_link_get_config accepted unconfigured link or returned incorrect error: %s\n", strerror(errno));
knet_host_remove(knet_h, 1);
knet_handle_free(knet_h);
flush_logs(logfds[0], stdout);
close_logpipes(logfds);
exit(FAIL);
}
flush_logs(logfds[0], stdout);
printf("Test knet_link_get_config with incorrect dst_addr\n");
if (knet_link_set_config(knet_h, 1, 0, KNET_TRANSPORT_UDP, &src, &dst, 0) < 0) {
printf("Unable to configure link: %s\n", strerror(errno));
knet_host_remove(knet_h, 1);
knet_handle_free(knet_h);
flush_logs(logfds[0], stdout);
close_logpipes(logfds);
exit(FAIL);
}
memset(&get_src, 0, sizeof(struct sockaddr_storage));
memset(&get_dst, 0, sizeof(struct sockaddr_storage));
if ((!knet_link_get_config(knet_h, 1, 0, &transport, &get_src, NULL, &dynamic, &flags)) || (errno != EINVAL)) {
printf("knet_link_get_config accepted invalid dst_addr or returned incorrect error: %s\n", strerror(errno));
knet_link_clear_config(knet_h, 1, 0);
knet_host_remove(knet_h, 1);
knet_handle_free(knet_h);
flush_logs(logfds[0], stdout);
close_logpipes(logfds);
exit(FAIL);
}
if (dynamic) {
printf("knet_link_get_config returned invalid dynamic status\n");
knet_link_clear_config(knet_h, 1, 0);
knet_host_remove(knet_h, 1);
knet_handle_free(knet_h);
flush_logs(logfds[0], stdout);
close_logpipes(logfds);
exit(FAIL);
}
flush_logs(logfds[0], stdout);
printf("Test knet_link_get_config with correct parameters for static link\n");
memset(&get_src, 0, sizeof(struct sockaddr_storage));
memset(&get_dst, 0, sizeof(struct sockaddr_storage));
if (knet_link_get_config(knet_h, 1, 0, &transport, &get_src, &get_dst, &dynamic, &flags) < 0) {
printf("knet_link_get_config failed: %s\n", strerror(errno));
knet_link_clear_config(knet_h, 1, 0);
knet_host_remove(knet_h, 1);
knet_handle_free(knet_h);
flush_logs(logfds[0], stdout);
close_logpipes(logfds);
exit(FAIL);
}
if (transport != KNET_TRANSPORT_UDP) {
printf("knet_link_get_config returned incorrect transport: %d\n", transport);
knet_link_clear_config(knet_h, 1, 0);
knet_host_remove(knet_h, 1);
knet_handle_free(knet_h);
flush_logs(logfds[0], stdout);
close_logpipes(logfds);
exit(FAIL);
}
if ((dynamic) ||
(memcmp(&src, &get_src, sizeof(struct sockaddr_storage))) ||
(memcmp(&dst, &get_dst, sizeof(struct sockaddr_storage)))) {
printf("knet_link_get_config returned invalid data\n");
knet_link_clear_config(knet_h, 1, 0);
knet_host_remove(knet_h, 1);
knet_handle_free(knet_h);
flush_logs(logfds[0], stdout);
close_logpipes(logfds);
exit(FAIL);
}
flush_logs(logfds[0], stdout);
printf("Test knet_link_get_config with correct parameters for dynamic link\n");
if (knet_link_clear_config(knet_h, 1, 0) < 0) {
printf("Unable to deconfigure link: %s\n", strerror(errno));
knet_host_remove(knet_h, 1);
knet_handle_free(knet_h);
flush_logs(logfds[0], stdout);
close_logpipes(logfds);
exit(FAIL);
}
if (knet_link_set_config(knet_h, 1, 0, KNET_TRANSPORT_UDP, &src, NULL, 0) < 0) {
printf("Unable to configure link: %s\n", strerror(errno));
knet_link_clear_config(knet_h, 1, 0);
knet_host_remove(knet_h, 1);
knet_handle_free(knet_h);
flush_logs(logfds[0], stdout);
close_logpipes(logfds);
exit(FAIL);
}
memset(&get_src, 0, sizeof(struct sockaddr_storage));
memset(&get_dst, 0, sizeof(struct sockaddr_storage));
if (knet_link_get_config(knet_h, 1, 0, &transport, &get_src, &get_dst, &dynamic, &flags) < 0) {
printf("knet_link_get_config failed: %s\n", strerror(errno));
knet_link_clear_config(knet_h, 1, 0);
knet_host_remove(knet_h, 1);
knet_handle_free(knet_h);
flush_logs(logfds[0], stdout);
close_logpipes(logfds);
exit(FAIL);
}
if ((!dynamic) ||
(memcmp(&src, &get_src, sizeof(struct sockaddr_storage)))) {
printf("knet_link_get_config returned invalid data\n");
knet_link_clear_config(knet_h, 1, 0);
knet_host_remove(knet_h, 1);
knet_handle_free(knet_h);
flush_logs(logfds[0], stdout);
close_logpipes(logfds);
exit(FAIL);
}
printf("Test knet_link_get_config NULL transport ptr\n");
if ((!knet_link_get_config(knet_h, 1, 0, NULL, &get_src, &get_dst, &dynamic, &flags)) || (errno != EINVAL)) {
printf("knet_link_get_config accepted NULL &transport or returned incorrect error: %s\n", strerror(errno));
exit(FAIL);
}
printf("Test knet_link_get_config with flags\n");
if (knet_link_clear_config(knet_h, 1, 0) < 0) {
printf("Unable to deconfigure link: %s\n", strerror(errno));
knet_host_remove(knet_h, 1);
knet_handle_free(knet_h);
flush_logs(logfds[0], stdout);
close_logpipes(logfds);
exit(FAIL);
}
- if (knet_link_set_config(knet_h, 1, 0, KNET_TRANSPORT_UDP, &src, NULL, 1) < 0) {
+ if (knet_link_set_config(knet_h, 1, 0, KNET_TRANSPORT_UDP, &src, NULL, KNET_LINK_FLAG_TRAFFICHIPRIO) < 0) {
printf("Unable to configure link: %s\n", strerror(errno));
knet_link_clear_config(knet_h, 1, 0);
knet_host_remove(knet_h, 1);
knet_handle_free(knet_h);
flush_logs(logfds[0], stdout);
close_logpipes(logfds);
exit(FAIL);
}
if (knet_link_get_config(knet_h, 1, 0, &transport, &get_src, &get_dst, &dynamic, &flags) < 0) {
printf("knet_link_get_config failed: %s\n", strerror(errno));
knet_link_clear_config(knet_h, 1, 0);
knet_host_remove(knet_h, 1);
knet_handle_free(knet_h);
flush_logs(logfds[0], stdout);
close_logpipes(logfds);
exit(FAIL);
}
- if (!flags) {
+ if (flags != KNET_LINK_FLAG_TRAFFICHIPRIO) {
printf("knet_link_get_config returned no flags\n");
knet_link_clear_config(knet_h, 1, 0);
knet_host_remove(knet_h, 1);
knet_handle_free(knet_h);
flush_logs(logfds[0], stdout);
close_logpipes(logfds);
exit(FAIL);
}
flush_logs(logfds[0], stdout);
knet_link_clear_config(knet_h, 1, 0);
knet_host_remove(knet_h, 1);
knet_handle_free(knet_h);
flush_logs(logfds[0], stdout);
close_logpipes(logfds);
}
int main(int argc, char *argv[])
{
need_root();
test();
return PASS;
}
diff --git a/libknet/transport_common.c b/libknet/transport_common.c
index 29eca302..b9524051 100644
--- a/libknet/transport_common.c
+++ b/libknet/transport_common.c
@@ -1,524 +1,526 @@
#include "config.h"
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <pthread.h>
#include <sys/types.h>
#include <sys/socket.h>
#include "libknet.h"
#include "compat.h"
#include "host.h"
#include "link.h"
#include "logging.h"
#include "common.h"
#include "transports.h"
/*
* reuse Jan Friesse's compat layer as wrapper to drop usage of sendmmsg
*
* TODO: kill those wrappers once we work on packet delivery guaranteed
*/
int _recvmmsg(int sockfd, struct knet_mmsghdr *msgvec, unsigned int vlen, unsigned int flags)
{
int savederrno = 0, err = 0;
unsigned int i;
for (i = 0; i < vlen; i++) {
err = recvmsg(sockfd, &msgvec[i].msg_hdr, flags);
savederrno = errno;
if (err >= 0) {
msgvec[i].msg_len = err;
} else {
if ((i > 0) &&
((errno == EAGAIN) || (errno == EWOULDBLOCK))) {
savederrno = 0;
}
break;
}
}
errno = savederrno;
return ((i > 0) ? (int)i : err);
}
int _sendmmsg(int sockfd, struct knet_mmsghdr *msgvec, unsigned int vlen, unsigned int flags)
{
int savederrno = 0, err = 0;
unsigned int i;
for (i = 0; i < vlen; i++) {
err = sendmsg(sockfd, &msgvec[i].msg_hdr, flags);
savederrno = errno;
if (err < 0) {
break;
}
}
errno = savederrno;
return ((i > 0) ? (int)i : err);
}
-int _configure_common_socket(knet_handle_t knet_h, int sock, const char *type)
+int _configure_common_socket(knet_handle_t knet_h, int sock, uint64_t flags, const char *type)
{
int err = 0, savederrno = 0;
int value;
if (_fdset_cloexec(sock)) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSPORT, "Unable to set %s CLOEXEC socket opts: %s",
type, strerror(savederrno));
goto exit_error;
}
if (_fdset_nonblock(sock)) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSPORT, "Unable to set %s NONBLOCK socket opts: %s",
type, strerror(savederrno));
goto exit_error;
}
value = KNET_RING_RCVBUFF;
#ifdef SO_RCVBUFFORCE
if (setsockopt(sock, SOL_SOCKET, SO_RCVBUFFORCE, &value, sizeof(value)) < 0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSPORT, "Unable to set %s receive buffer: %s",
type, strerror(savederrno));
goto exit_error;
}
#else
if (setsockopt(sock, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) < 0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSPORT, "Unable to set %s SO_RECVBUF: %s",
type, strerror(savederrno));
goto exit_error;
}
#endif
value = KNET_RING_RCVBUFF;
#ifdef SO_SNDBUFFORCE
if (setsockopt(sock, SOL_SOCKET, SO_SNDBUFFORCE, &value, sizeof(value)) < 0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSPORT, "Unable to set %s send buffer: %s",
type, strerror(savederrno));
goto exit_error;
}
#else
if (setsockopt(sock, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) < 0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSPORT, "Unable to set %s SO_SNDBUF: %s",
type, strerror(savederrno));
goto exit_error;
}
#endif
#ifdef SO_PRIORITY
- value = 6; /* TC_PRIO_INTERACTIVE */
- if (setsockopt(sock, SOL_SOCKET, SO_PRIORITY, &value, sizeof(value)) < 0) {
- savederrno = errno;
- err = -1;
- log_err(knet_h, KNET_SUB_TRANSPORT, "Unable to set %s priority: %s",
- type, strerror(savederrno));
- goto exit_error;
+ if (flags & KNET_LINK_FLAG_TRAFFICHIPRIO) {
+ value = 6; /* TC_PRIO_INTERACTIVE */
+ if (setsockopt(sock, SOL_SOCKET, SO_PRIORITY, &value, sizeof(value)) < 0) {
+ savederrno = errno;
+ err = -1;
+ log_err(knet_h, KNET_SUB_TRANSPORT, "Unable to set %s priority: %s",
+ type, strerror(savederrno));
+ goto exit_error;
+ }
}
#endif
exit_error:
errno = savederrno;
return err;
}
-int _configure_transport_socket(knet_handle_t knet_h, int sock, struct sockaddr_storage *address, const char *type)
+int _configure_transport_socket(knet_handle_t knet_h, int sock, struct sockaddr_storage *address, uint64_t flags, const char *type)
{
int err = 0, savederrno = 0;
int value;
- if (_configure_common_socket(knet_h, sock, type) < 0) {
+ if (_configure_common_socket(knet_h, sock, flags, type) < 0) {
savederrno = errno;
err = -1;
goto exit_error;
}
#ifdef IP_FREEBIND
value = 1;
if (setsockopt(sock, SOL_IP, IP_FREEBIND, &value, sizeof(value)) <0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSPORT, "Unable to set FREEBIND on %s socket: %s",
type, strerror(savederrno));
goto exit_error;
}
#endif
#ifdef IP_BINDANY /* BSD */
value = 1;
if (setsockopt(sock, IPPROTO_IP, IP_BINDANY, &value, sizeof(value)) <0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSPORT, "Unable to set BINDANY on %s socket: %s",
type, strerror(savederrno));
goto exit_error;
}
#endif
if (address->ss_family == AF_INET6) {
value = 1;
if (setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY,
&value, sizeof(value)) < 0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSPORT, "Unable to set %s IPv6 only: %s",
type, strerror(savederrno));
goto exit_error;
}
#ifdef IPV6_MTU_DISCOVER
value = IPV6_PMTUDISC_PROBE;
if (setsockopt(sock, SOL_IPV6, IPV6_MTU_DISCOVER, &value, sizeof(value)) <0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSPORT, "Unable to set PMTUDISC on %s socket: %s",
type, strerror(savederrno));
goto exit_error;
}
#else
value = 1;
if (setsockopt(sock, IPPROTO_IPV6, IPV6_DONTFRAG, &value, sizeof(value)) <0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSPORT, "Unable to set DONTFRAG on %s socket: %s",
type, strerror(savederrno));
goto exit_error;
}
#endif
} else {
#ifdef IP_MTU_DISCOVER
value = IP_PMTUDISC_PROBE;
if (setsockopt(sock, SOL_IP, IP_MTU_DISCOVER, &value, sizeof(value)) <0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSPORT, "Unable to set PMTUDISC on %s socket: %s",
type, strerror(savederrno));
goto exit_error;
}
#else
value = 1;
if (setsockopt(sock, IPPROTO_IP, IP_DONTFRAG, &value, sizeof(value)) <0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSPORT, "Unable to set DONTFRAG on %s socket: %s",
type, strerror(savederrno));
goto exit_error;
}
#endif
}
value = 1;
if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &value, sizeof(value)) < 0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSPORT, "Unable to set %s reuseaddr: %s",
type, strerror(savederrno));
goto exit_error;
}
exit_error:
errno = savederrno;
return err;
}
int _init_socketpair(knet_handle_t knet_h, int *sock)
{
int err = 0, savederrno = 0;
int i;
if (socketpair(AF_UNIX, SOCK_SEQPACKET, 0, sock) != 0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_HANDLE, "Unable to initialize socketpair: %s",
strerror(savederrno));
goto exit_fail;
}
for (i = 0; i < 2; i++) {
- if (_configure_common_socket(knet_h, sock[i], "local socketpair") < 0) {
+ if (_configure_common_socket(knet_h, sock[i], 0, "local socketpair") < 0) {
savederrno = errno;
err = -1;
goto exit_fail;
}
}
exit_fail:
errno = savederrno;
return err;
}
void _close_socketpair(knet_handle_t knet_h, int *sock)
{
int i;
for (i = 0; i < 2; i++) {
if (sock[i]) {
close(sock[i]);
sock[i] = 0;
}
}
}
/*
* must be called with global read lock
*
* return -1 on error
* return 0 if fd is invalid
* return 1 if fd is valid
*/
int _is_valid_fd(knet_handle_t knet_h, int sockfd)
{
int ret = 0;
if (sockfd < 0) {
errno = EINVAL;
return -1;
}
if (sockfd > KNET_MAX_FDS) {
errno = EINVAL;
return -1;
}
if (knet_h->knet_transport_fd_tracker[sockfd].transport >= KNET_MAX_TRANSPORTS) {
ret = 0;
} else {
ret = 1;
}
return ret;
}
/*
* must be called with global write lock
*/
int _set_fd_tracker(knet_handle_t knet_h, int sockfd, uint8_t transport, uint8_t data_type, void *data)
{
if (sockfd < 0) {
errno = EINVAL;
return -1;
}
if (sockfd > KNET_MAX_FDS) {
errno = EINVAL;
return -1;
}
knet_h->knet_transport_fd_tracker[sockfd].transport = transport;
knet_h->knet_transport_fd_tracker[sockfd].data_type = data_type;
knet_h->knet_transport_fd_tracker[sockfd].data = data;
return 0;
}
/*
* public api
*/
int knet_handle_get_transport_list(knet_handle_t knet_h,
struct transport_info *transport_list, size_t *transport_list_entries)
{
int err = 0, savederrno = 0;
int i, count;
if (!knet_h) {
errno = EINVAL;
return -1;
}
if (!transport_list) {
errno = EINVAL;
return -1;
}
if (!transport_list_entries) {
errno = EINVAL;
return -1;
}
savederrno = pthread_rwlock_rdlock(&knet_h->global_rwlock);
if (savederrno) {
log_err(knet_h, KNET_SUB_HANDLE, "Unable to get read lock: %s",
strerror(savederrno));
errno = savederrno;
return -1;
}
count = 0;
/*
* we could potentially build this struct
* at knet_handle_new init time, but
* let's keep it dynamic in case at somepoint
* we need to init transports dynamically
* at runtime vs init time.
*/
for (i=0; i<KNET_MAX_TRANSPORTS; i++) {
if (knet_h->transport_ops[i]) {
transport_list[count].name = knet_h->transport_ops[i]->transport_name;
transport_list[count].id = knet_h->transport_ops[i]->transport_id;
count++;
}
}
*transport_list_entries = count;
pthread_rwlock_unlock(&knet_h->global_rwlock);
return err;
}
const char *knet_handle_get_transport_name_by_id(knet_handle_t knet_h, uint8_t transport)
{
int savederrno = 0;
const char *name = NULL;
if (!knet_h) {
errno = EINVAL;
return name;
}
if (transport >= KNET_MAX_TRANSPORTS) {
errno = EINVAL;
return name;
}
savederrno = pthread_rwlock_rdlock(&knet_h->global_rwlock);
if (savederrno) {
log_err(knet_h, KNET_SUB_HANDLE, "Unable to get read lock: %s",
strerror(savederrno));
errno = savederrno;
return name;
}
if (knet_h->transport_ops[transport]) {
name = knet_h->transport_ops[transport]->transport_name;
} else {
savederrno = ENOENT;
}
pthread_rwlock_unlock(&knet_h->global_rwlock);
errno = savederrno;
return name;
}
uint8_t knet_handle_get_transport_id_by_name(knet_handle_t knet_h, const char *name)
{
int savederrno = 0;
uint8_t err = KNET_MAX_TRANSPORTS;
int i;
if (!knet_h) {
errno = EINVAL;
return err;
}
if (!name) {
errno = EINVAL;
return err;
}
savederrno = pthread_rwlock_rdlock(&knet_h->global_rwlock);
if (savederrno) {
log_err(knet_h, KNET_SUB_HANDLE, "Unable to get read lock: %s",
strerror(savederrno));
errno = savederrno;
return err;
}
for (i=0; i<KNET_MAX_TRANSPORTS; i++) {
if (knet_h->transport_ops[i]) {
if (!strcmp(knet_h->transport_ops[i]->transport_name, name)) {
err = knet_h->transport_ops[i]->transport_id;
break;
}
}
}
if (err == KNET_MAX_TRANSPORTS) {
savederrno = EINVAL;
}
pthread_rwlock_unlock(&knet_h->global_rwlock);
errno = savederrno;
return err;
}
int knet_handle_set_transport_reconnect_interval(knet_handle_t knet_h, uint32_t msecs)
{
int savederrno = 0;
if (!knet_h) {
errno = EINVAL;
return -1;
}
if (!msecs) {
errno = EINVAL;
return -1;
}
if (msecs < 1000) {
log_warn(knet_h, KNET_SUB_HANDLE, "reconnect internval below 1 sec (%u msecs) might be too aggressive", msecs);
}
if (msecs > 60000) {
log_warn(knet_h, KNET_SUB_HANDLE, "reconnect internval above 1 minute (%u msecs) could cause long delays in network convergiance", msecs);
}
savederrno = pthread_rwlock_wrlock(&knet_h->global_rwlock);
if (savederrno) {
log_err(knet_h, KNET_SUB_HANDLE, "Unable to get read lock: %s",
strerror(savederrno));
errno = savederrno;
return -1;
}
knet_h->reconnect_int = msecs;
pthread_rwlock_unlock(&knet_h->global_rwlock);
return 0;
}
int knet_handle_get_transport_reconnect_interval(knet_handle_t knet_h, uint32_t *msecs)
{
int savederrno = 0;
if (!knet_h) {
errno = EINVAL;
return -1;
}
if (!msecs) {
errno = EINVAL;
return -1;
}
savederrno = pthread_rwlock_rdlock(&knet_h->global_rwlock);
if (savederrno) {
log_err(knet_h, KNET_SUB_HANDLE, "Unable to get read lock: %s",
strerror(savederrno));
errno = savederrno;
return -1;
}
*msecs = knet_h->reconnect_int;
pthread_rwlock_unlock(&knet_h->global_rwlock);
return 0;
}
diff --git a/libknet/transport_sctp.c b/libknet/transport_sctp.c
index d052e200..b766fcf4 100644
--- a/libknet/transport_sctp.c
+++ b/libknet/transport_sctp.c
@@ -1,1440 +1,1440 @@
#include "config.h"
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <pthread.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <stdlib.h>
#include "compat.h"
#include "host.h"
#include "link.h"
#include "logging.h"
#include "common.h"
#include "transports.h"
#include "threads_common.h"
#ifdef HAVE_NETINET_SCTP_H
#include <netinet/sctp.h>
/*
* https://en.wikipedia.org/wiki/SCTP_packet_structure
*/
#define KNET_PMTUD_SCTP_OVERHEAD_COMMON 12
#define KNET_PMTUD_SCTP_OVERHEAD_DATA_CHUNK 16
#define KNET_PMTUD_SCTP_OVERHEAD KNET_PMTUD_SCTP_OVERHEAD_COMMON + KNET_PMTUD_SCTP_OVERHEAD_DATA_CHUNK
typedef struct sctp_handle_info {
struct knet_list_head listen_links_list;
struct knet_list_head connect_links_list;
int connect_epollfd;
int connectsockfd[2];
int listen_epollfd;
int listensockfd[2];
pthread_t connect_thread;
pthread_t listen_thread;
} sctp_handle_info_t;
/*
* use by fd_tracker data type
*/
#define SCTP_NO_LINK_INFO 0
#define SCTP_LISTENER_LINK_INFO 1
#define SCTP_ACCEPTED_LINK_INFO 2
#define SCTP_CONNECT_LINK_INFO 3
/*
* this value is per listener
*/
#define MAX_ACCEPTED_SOCKS 256
typedef struct sctp_listen_link_info {
struct knet_list_head list;
int listen_sock;
int accepted_socks[MAX_ACCEPTED_SOCKS];
struct sockaddr_storage src_address;
int on_listener_epoll;
int on_rx_epoll;
} sctp_listen_link_info_t;
typedef struct sctp_accepted_link_info {
char mread_buf[KNET_DATABUFSIZE];
ssize_t mread_len;
sctp_listen_link_info_t *link_info;
} sctp_accepted_link_info_t ;
typedef struct sctp_connect_link_info {
struct knet_list_head list;
sctp_listen_link_info_t *listener;
struct knet_link *link;
struct sockaddr_storage dst_address;
int connect_sock;
int on_connected_epoll;
int on_rx_epoll;
int close_sock;
} sctp_connect_link_info_t;
/*
* socket handling functions
*
* those functions do NOT perform locking. locking
* should be handled in the right context from callers
*/
/*
* sockets are removed from rx_epoll from callers
* see also error handling functions
*/
static int _close_connect_socket(knet_handle_t knet_h, struct knet_link *kn_link)
{
int err = 0, savederrno = 0;
sctp_connect_link_info_t *info = kn_link->transport_link;
sctp_handle_info_t *handle_info = knet_h->transports[KNET_TRANSPORT_SCTP];
struct epoll_event ev;
if (info->on_connected_epoll) {
memset(&ev, 0, sizeof(struct epoll_event));
ev.events = EPOLLOUT;
ev.data.fd = info->connect_sock;
if (epoll_ctl(handle_info->connect_epollfd, EPOLL_CTL_DEL, info->connect_sock, &ev)) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to remove connected socket from the epoll pool: %s",
strerror(errno));
goto exit_error;
}
info->on_connected_epoll = 0;
}
exit_error:
if (info->connect_sock != -1) {
if (_set_fd_tracker(knet_h, info->connect_sock, KNET_MAX_TRANSPORTS, SCTP_NO_LINK_INFO, NULL) < 0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to set fd tracker: %s",
strerror(savederrno));
goto exit_error;
}
close(info->connect_sock);
info->connect_sock = -1;
}
errno = savederrno;
return err;
}
static int _enable_sctp_notifications(knet_handle_t knet_h, int sock, const char *type)
{
int err = 0, savederrno = 0;
struct sctp_event_subscribe events;
memset(&events, 0, sizeof (events));
events.sctp_data_io_event = 1;
events.sctp_association_event = 1;
events.sctp_send_failure_event = 1;
events.sctp_address_event = 1;
events.sctp_peer_error_event = 1;
events.sctp_shutdown_event = 1;
if (setsockopt(sock, IPPROTO_SCTP, SCTP_EVENTS, &events, sizeof (events)) < 0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to enable %s events: %s",
type, strerror(savederrno));
}
errno = savederrno;
return err;
}
-static int _configure_sctp_socket(knet_handle_t knet_h, int sock, struct sockaddr_storage *address, const char *type)
+static int _configure_sctp_socket(knet_handle_t knet_h, int sock, struct sockaddr_storage *address, uint64_t flags, const char *type)
{
int err = 0, savederrno = 0;
int value;
int level;
#ifdef SOL_SCTP
level = SOL_SCTP;
#else
level = IPPROTO_SCTP;
#endif
- if (_configure_transport_socket(knet_h, sock, address, type) < 0) {
+ if (_configure_transport_socket(knet_h, sock, address, flags, type) < 0) {
savederrno = errno;
err = -1;
goto exit_error;
}
value = 1;
if (setsockopt(sock, level, SCTP_NODELAY, &value, sizeof(value)) < 0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSPORT, "Unable to set sctp nodelay: %s",
strerror(savederrno));
goto exit_error;
}
if (_enable_sctp_notifications(knet_h, sock, type) < 0) {
savederrno = errno;
err = -1;
}
exit_error:
errno = savederrno;
return err;
}
static int _reconnect_socket(knet_handle_t knet_h, struct knet_link *kn_link)
{
int err = 0, savederrno = 0;
sctp_connect_link_info_t *info = kn_link->transport_link;
sctp_handle_info_t *handle_info = knet_h->transports[KNET_TRANSPORT_SCTP];
struct epoll_event ev;
if (connect(info->connect_sock, (struct sockaddr *)&kn_link->dst_addr, sockaddr_len(&kn_link->dst_addr)) < 0) {
if ((errno != EALREADY) && (errno != EINPROGRESS) && (errno != EISCONN)) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to connect SCTP socket %d: %s",
info->connect_sock, strerror(savederrno));
goto exit_error;
}
}
if (!info->on_connected_epoll) {
memset(&ev, 0, sizeof(struct epoll_event));
ev.events = EPOLLOUT;
ev.data.fd = info->connect_sock;
if (epoll_ctl(handle_info->connect_epollfd, EPOLL_CTL_ADD, info->connect_sock, &ev)) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to add send/recv to epoll pool: %s",
strerror(savederrno));
goto exit_error;
}
info->on_connected_epoll = 1;
}
exit_error:
errno = savederrno;
return err;
}
static int _create_connect_socket(knet_handle_t knet_h, struct knet_link *kn_link)
{
int err = 0, savederrno = 0;
sctp_connect_link_info_t *info = kn_link->transport_link;
sctp_handle_info_t *handle_info = knet_h->transports[KNET_TRANSPORT_SCTP];
struct epoll_event ev;
int connect_sock;
connect_sock = socket(kn_link->dst_addr.ss_family, SOCK_STREAM, IPPROTO_SCTP);
if (connect_sock < 0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to create send/recv socket: %s",
strerror(savederrno));
goto exit_error;
}
- if (_configure_sctp_socket(knet_h, connect_sock, &kn_link->dst_addr, "SCTP connect") < 0) {
+ if (_configure_sctp_socket(knet_h, connect_sock, &kn_link->dst_addr, kn_link->flags, "SCTP connect") < 0) {
savederrno = errno;
err = -1;
goto exit_error;
}
if (_set_fd_tracker(knet_h, connect_sock, KNET_TRANSPORT_SCTP, SCTP_CONNECT_LINK_INFO, info) < 0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to set fd tracker: %s",
strerror(savederrno));
goto exit_error;
}
info->connect_sock = connect_sock;
info->close_sock = 0;
if (_reconnect_socket(knet_h, kn_link) < 0) {
savederrno = errno;
err = -1;
goto exit_error;
}
exit_error:
if (err) {
if (info->on_connected_epoll) {
epoll_ctl(handle_info->connect_epollfd, EPOLL_CTL_DEL, connect_sock, &ev);
}
if (connect_sock >= 0) {
close(connect_sock);
}
}
errno = savederrno;
return err;
}
static int sctp_transport_tx_sock_error(knet_handle_t knet_h, int sockfd, int recv_err, int recv_errno)
{
sctp_connect_link_info_t *connect_info = knet_h->knet_transport_fd_tracker[sockfd].data;
sctp_accepted_link_info_t *accepted_info = knet_h->knet_transport_fd_tracker[sockfd].data;
sctp_listen_link_info_t *listen_info;
if (recv_err < 0) {
switch (knet_h->knet_transport_fd_tracker[sockfd].data_type) {
case SCTP_CONNECT_LINK_INFO:
if (connect_info->link->transport_connected == 0) {
return -1;
}
break;
case SCTP_ACCEPTED_LINK_INFO:
listen_info = accepted_info->link_info;
if (listen_info->listen_sock != sockfd) {
if (listen_info->on_rx_epoll == 0) {
return -1;
}
}
break;
}
if (recv_errno == EAGAIN) {
#ifdef DEBUG
log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Sock: %d is overloaded. Slowing TX down", sockfd);
#endif
/* Don't hold onto the lock while sleeping */
pthread_rwlock_unlock(&knet_h->global_rwlock);
usleep(KNET_THREADS_TIMERES / 16);
pthread_rwlock_rdlock(&knet_h->global_rwlock);
return 1;
}
return -1;
}
return 0;
}
/*
* socket error management functions
*
* both called with global read lock.
*
* NOTE: we need to remove the fd from the epoll as soon as possible
* even before we notify the respective thread to take care of it
* because scheduling can make it so that this thread will overload
* and the threads supposed to take care of the error will never
* be able to take action.
* we CANNOT handle FDs here diretly (close/reconnect/etc) due
* to locking context. We need to delegate that to their respective
* management threads within global write lock.
*
* this function is called from:
* - RX thread with recv_err <= 0 directly on recvmmsg error
* - transport_rx_is_data when msg_len == 0 (recv_err = 1)
* - transport_rx_is_data on notification (recv_err = 2)
*
* basically this small abouse of recv_err is to detect notifications
* generated by sockets created by listen().
*/
static int sctp_transport_rx_sock_error(knet_handle_t knet_h, int sockfd, int recv_err, int recv_errno)
{
struct epoll_event ev;
sctp_connect_link_info_t *connect_info = knet_h->knet_transport_fd_tracker[sockfd].data;
sctp_accepted_link_info_t *accepted_info = knet_h->knet_transport_fd_tracker[sockfd].data;
sctp_listen_link_info_t *listen_info;
sctp_handle_info_t *handle_info = knet_h->transports[KNET_TRANSPORT_SCTP];
switch (knet_h->knet_transport_fd_tracker[sockfd].data_type) {
case SCTP_CONNECT_LINK_INFO:
/*
* all connect link have notifications enabled
* and we accept only data from notification and
* generic recvmmsg errors.
*
* Errors generated by msg_len 0 can be ignored because
* they follow a notification (double notification)
*/
if (recv_err != 1) {
connect_info->link->transport_connected = 0;
if (connect_info->on_rx_epoll) {
memset(&ev, 0, sizeof(struct epoll_event));
ev.events = EPOLLIN;
ev.data.fd = sockfd;
if (epoll_ctl(knet_h->recv_from_links_epollfd, EPOLL_CTL_DEL, sockfd, &ev)) {
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to remove EOFed socket from epoll pool: %s",
strerror(errno));
return -1;
}
connect_info->on_rx_epoll = 0;
}
log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Notifying connect thread that sockfd %d received an error", sockfd);
if (sendto(handle_info->connectsockfd[1], &sockfd, sizeof(int), MSG_DONTWAIT | MSG_NOSIGNAL, NULL, 0) != sizeof(int)) {
log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to notify connect thread: %s", strerror(errno));
}
}
break;
case SCTP_ACCEPTED_LINK_INFO:
listen_info = accepted_info->link_info;
if (listen_info->listen_sock != sockfd) {
if (recv_err != 1) {
if (listen_info->on_rx_epoll) {
memset(&ev, 0, sizeof(struct epoll_event));
ev.events = EPOLLIN;
ev.data.fd = sockfd;
if (epoll_ctl(knet_h->recv_from_links_epollfd, EPOLL_CTL_DEL, sockfd, &ev)) {
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to remove EOFed socket from epoll pool: %s",
strerror(errno));
return -1;
}
listen_info->on_rx_epoll = 0;
}
log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Notifying listen thread that sockfd %d received an error", sockfd);
if (sendto(handle_info->listensockfd[1], &sockfd, sizeof(int), MSG_DONTWAIT | MSG_NOSIGNAL, NULL, 0) != sizeof(int)) {
log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to notify listen thread: %s", strerror(errno));
}
}
} else {
/*
* this means the listen() socket has generated
* a notification. now what? :-)
*/
log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Received stray notification for listen() socket %d", sockfd);
}
break;
default:
log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Received unknown notification? %d", sockfd);
break;
}
/*
* Under RX pressure we need to give time to IPC to pick up the message
*/
/* Don't hold onto the lock while sleeping */
pthread_rwlock_unlock(&knet_h->global_rwlock);
usleep(KNET_THREADS_TIMERES / 2);
pthread_rwlock_rdlock(&knet_h->global_rwlock);
return 0;
}
/*
* NOTE: sctp_transport_rx_is_data is called with global rdlock
* delegate any FD error management to sctp_transport_rx_sock_error
* and keep this code to parsing incoming data only
*/
static int sctp_transport_rx_is_data(knet_handle_t knet_h, int sockfd, struct knet_mmsghdr *msg)
{
size_t i;
struct iovec *iov = msg->msg_hdr.msg_iov;
size_t iovlen = msg->msg_hdr.msg_iovlen;
struct sctp_assoc_change *sac;
union sctp_notification *snp;
sctp_accepted_link_info_t *info = knet_h->knet_transport_fd_tracker[sockfd].data;
if (!(msg->msg_hdr.msg_flags & MSG_NOTIFICATION)) {
if (msg->msg_len == 0) {
log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "received 0 bytes len packet: %d", sockfd);
/*
* NOTE: with event notification enabled, we receive error twice:
* 1) from the event notification
* 2) followed by a 0 byte msg_len
*
* This is generally not a problem if not for causing extra
* handling for the same issue. Should we drop notifications
* and keep the code generic (handle all errors via msg_len = 0)
* or keep the duplication as safety measure, or drop msg_len = 0
* handling (what about sockets without events enabled?)
*/
sctp_transport_rx_sock_error(knet_h, sockfd, 1, 0);
return 1;
}
/*
* missing MSG_EOR has to be treated as a short read
* from the socket and we need to fill in the mread buf
* while we wait for MSG_EOR
*/
if (!(msg->msg_hdr.msg_flags & MSG_EOR)) {
/*
* copy the incoming data into mread_buf + mread_len (incremental)
* and increase mread_len
*/
memmove(info->mread_buf + info->mread_len, iov->iov_base, msg->msg_len);
info->mread_len = info->mread_len + msg->msg_len;
return 0;
}
/*
* got EOR.
* if mread_len is > 0 we are completing a packet from short reads
* complete reassembling the packet in mread_buf, copy it back in the iov
* and set the iov/msg len numbers (size) correctly
*/
if (info->mread_len) {
/*
* add last fragment to mread_buf
*/
memmove(info->mread_buf + info->mread_len, iov->iov_base, msg->msg_len);
info->mread_len = info->mread_len + msg->msg_len;
/*
* move all back into the iovec
*/
memmove(iov->iov_base, info->mread_buf, info->mread_len);
msg->msg_len = info->mread_len;
info->mread_len = 0;
}
return 2;
}
if (!(msg->msg_hdr.msg_flags & MSG_EOR)) {
return 1;
}
for (i=0; i< iovlen; i++) {
snp = iov[i].iov_base;
switch (snp->sn_header.sn_type) {
case SCTP_ASSOC_CHANGE:
log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "[event] sctp assoc change");
sac = &snp->sn_assoc_change;
if (sac->sac_state == SCTP_COMM_LOST) {
log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "[event] sctp assoc change: comm_lost");
sctp_transport_rx_sock_error(knet_h, sockfd, 2, 0);
}
break;
case SCTP_SHUTDOWN_EVENT:
log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "[event] sctp shutdown event");
sctp_transport_rx_sock_error(knet_h, sockfd, 2, 0);
break;
case SCTP_SEND_FAILED:
log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "[event] sctp send failed");
break;
case SCTP_PEER_ADDR_CHANGE:
log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "[event] sctp peer addr change");
break;
case SCTP_REMOTE_ERROR:
log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "[event] sctp remote error");
break;
default:
log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "[event] unknown sctp event type: %hu\n", snp->sn_header.sn_type);
break;
}
}
return 0;
}
/*
* connect / outgoing socket management thread
*/
/*
* _handle_connected_sctp* are called with a global write lock
* from the connect_thread
*/
static void _handle_connected_sctp(knet_handle_t knet_h, int connect_sock)
{
int err;
struct epoll_event ev;
unsigned int status, len = sizeof(status);
sctp_handle_info_t *handle_info = knet_h->transports[KNET_TRANSPORT_SCTP];
sctp_connect_link_info_t *info = knet_h->knet_transport_fd_tracker[connect_sock].data;
struct knet_link *kn_link = info->link;
err = getsockopt(connect_sock, SOL_SOCKET, SO_ERROR, &status, &len);
if (err) {
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "SCTP getsockopt() on connecting socket %d failed: %s",
connect_sock, strerror(errno));
return;
}
if (info->close_sock) {
if (_close_connect_socket(knet_h, kn_link) < 0) {
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to close sock %d from _handle_connected_sctp: %s", connect_sock, strerror(errno));
return;
}
info->close_sock = 0;
if (_create_connect_socket(knet_h, kn_link) < 0) {
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to recreate connecting sock! %s", strerror(errno));
return;
}
}
if (status) {
log_info(knet_h, KNET_SUB_TRANSP_SCTP, "SCTP connect on %d to %s port %s failed: %s",
connect_sock, kn_link->status.dst_ipaddr, kn_link->status.dst_port,
strerror(status));
/*
* No need to create a new socket if connect failed,
* just retry connect
*/
_reconnect_socket(knet_h, info->link);
return;
}
/*
* Connected - Remove us from the connect epoll
*/
memset(&ev, 0, sizeof(struct epoll_event));
ev.events = EPOLLOUT;
ev.data.fd = connect_sock;
if (epoll_ctl(handle_info->connect_epollfd, EPOLL_CTL_DEL, connect_sock, &ev)) {
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to remove connected socket %d from epoll pool: %s",
connect_sock, strerror(errno));
}
info->on_connected_epoll = 0;
kn_link->transport_connected = 1;
kn_link->outsock = info->connect_sock;
memset(&ev, 0, sizeof(struct epoll_event));
ev.events = EPOLLIN;
ev.data.fd = connect_sock;
if (epoll_ctl(knet_h->recv_from_links_epollfd, EPOLL_CTL_ADD, connect_sock, &ev)) {
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to add connected socket to epoll pool: %s",
strerror(errno));
}
info->on_rx_epoll = 1;
log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "SCTP handler fd %d now connected to %s port %s",
connect_sock,
kn_link->status.dst_ipaddr, kn_link->status.dst_port);
}
static void _handle_connected_sctp_errors(knet_handle_t knet_h)
{
int sockfd = -1;
sctp_handle_info_t *handle_info = knet_h->transports[KNET_TRANSPORT_SCTP];
sctp_connect_link_info_t *info;
if (recv(handle_info->connectsockfd[0], &sockfd, sizeof(int), MSG_DONTWAIT | MSG_NOSIGNAL) != sizeof(int)) {
log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Short read on connectsockfd");
return;
}
if (_is_valid_fd(knet_h, sockfd) < 1) {
log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Received stray notification for connected socket fd error");
return;
}
log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Processing connected error on socket: %d", sockfd);
info = knet_h->knet_transport_fd_tracker[sockfd].data;
info->close_sock = 1;
info->link->transport_connected = 0;
_reconnect_socket(knet_h, info->link);
}
static void *_sctp_connect_thread(void *data)
{
int savederrno;
int i, nev;
knet_handle_t knet_h = (knet_handle_t) data;
sctp_handle_info_t *handle_info = knet_h->transports[KNET_TRANSPORT_SCTP];
struct epoll_event events[KNET_EPOLL_MAX_EVENTS];
while (!shutdown_in_progress(knet_h)) {
nev = epoll_wait(handle_info->connect_epollfd, events, KNET_EPOLL_MAX_EVENTS, -1);
if (nev < 0) {
log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "SCTP connect handler EPOLL ERROR: %s",
strerror(errno));
continue;
}
/*
* Sort out which FD has a connection
*/
savederrno = pthread_rwlock_wrlock(&knet_h->global_rwlock);
if (savederrno) {
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to get write lock: %s",
strerror(savederrno));
continue;
}
/*
* minor optimization: deduplicate events
*
* in some cases we can receive multiple notifcations
* of the same FD having issues or need handling.
* It's enough to process it once even tho it's safe
* to handle them multiple times.
*/
for (i = 0; i < nev; i++) {
if (events[i].data.fd == handle_info->connectsockfd[0]) {
log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Received notification from rx_error for connected socket");
_handle_connected_sctp_errors(knet_h);
} else {
if (_is_valid_fd(knet_h, events[i].data.fd) == 1) {
_handle_connected_sctp(knet_h, events[i].data.fd);
} else {
log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Received stray notification for dead fd %d\n", events[i].data.fd);
}
}
}
pthread_rwlock_unlock(&knet_h->global_rwlock);
/*
* this thread can generate events for itself.
* we need to sleep in between loops to allow other threads
* to be scheduled
*/
usleep(knet_h->reconnect_int * 1000);
}
return NULL;
}
/*
* listen/incoming connections management thread
*/
/*
* Listener received a new connection
* called with a write lock from main thread
*/
static void _handle_incoming_sctp(knet_handle_t knet_h, int listen_sock)
{
int err = 0, savederrno = 0;
int new_fd;
int i = -1;
sctp_listen_link_info_t *info = knet_h->knet_transport_fd_tracker[listen_sock].data;
struct epoll_event ev;
struct sockaddr_storage ss;
socklen_t sock_len = sizeof(ss);
char addr_str[KNET_MAX_HOST_LEN];
char port_str[KNET_MAX_PORT_LEN];
sctp_accepted_link_info_t *accept_info = NULL;
new_fd = accept(listen_sock, (struct sockaddr *)&ss, &sock_len);
if (new_fd < 0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Incoming: accept error: %s", strerror(errno));
goto exit_error;
}
if (knet_addrtostr(&ss, sizeof(ss),
addr_str, KNET_MAX_HOST_LEN,
port_str, KNET_MAX_PORT_LEN) < 0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Incoming: unable to gather socket info");
goto exit_error;
}
log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Incoming: received connection from: %s port: %s",
addr_str, port_str);
/*
* Keep a track of all accepted FDs
*/
for (i=0; i<MAX_ACCEPTED_SOCKS; i++) {
if (info->accepted_socks[i] == -1) {
info->accepted_socks[i] = new_fd;
break;
}
}
if (i == MAX_ACCEPTED_SOCKS) {
errno = EBUSY;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Incoming: too many connections!");
goto exit_error;
}
- if (_configure_common_socket(knet_h, new_fd, "SCTP incoming") < 0) {
+ if (_configure_common_socket(knet_h, new_fd, 0, "SCTP incoming") < 0) { /* Inherit flags from listener? */
savederrno = errno;
err = -1;
goto exit_error;
}
if (_enable_sctp_notifications(knet_h, new_fd, "Incoming connection") < 0) {
savederrno = errno;
err = -1;
goto exit_error;
}
accept_info = malloc(sizeof(sctp_accepted_link_info_t));
if (!accept_info) {
savederrno = errno;
err = -1;
goto exit_error;
}
memset(accept_info, 0, sizeof(sctp_accepted_link_info_t));
accept_info->link_info = info;
if (_set_fd_tracker(knet_h, new_fd, KNET_TRANSPORT_SCTP, SCTP_ACCEPTED_LINK_INFO, accept_info) < 0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to set fd tracker: %s",
strerror(errno));
goto exit_error;
}
memset(&ev, 0, sizeof(struct epoll_event));
ev.events = EPOLLIN;
ev.data.fd = new_fd;
if (epoll_ctl(knet_h->recv_from_links_epollfd, EPOLL_CTL_ADD, new_fd, &ev)) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Incoming: unable to add accepted socket %d to epoll pool: %s",
new_fd, strerror(errno));
goto exit_error;
}
info->on_rx_epoll = 1;
log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Incoming: accepted new fd %d for %s/%s (listen fd: %d). index: %d",
new_fd, addr_str, port_str, info->listen_sock, i);
exit_error:
if (err) {
if ((i >= 0) || (i < MAX_ACCEPTED_SOCKS)) {
info->accepted_socks[i] = -1;
}
_set_fd_tracker(knet_h, new_fd, KNET_MAX_TRANSPORTS, SCTP_NO_LINK_INFO, NULL);
free(accept_info);
close(new_fd);
}
errno = savederrno;
return;
}
/*
* Listen thread received a notification of a bad socket that needs closing
* called with a write lock from main thread
*/
static void _handle_listen_sctp_errors(knet_handle_t knet_h)
{
int sockfd = -1;
sctp_handle_info_t *handle_info = knet_h->transports[KNET_TRANSPORT_SCTP];
sctp_accepted_link_info_t *accept_info;
sctp_listen_link_info_t *info;
struct knet_host *host;
int link_idx;
int i;
if (recv(handle_info->listensockfd[0], &sockfd, sizeof(int), MSG_DONTWAIT | MSG_NOSIGNAL) != sizeof(int)) {
log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Short read on listensockfd");
return;
}
if (_is_valid_fd(knet_h, sockfd) < 1) {
log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Received stray notification for listen socket fd error");
return;
}
log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Processing listen error on socket: %d", sockfd);
accept_info = knet_h->knet_transport_fd_tracker[sockfd].data;
info = accept_info->link_info;
/*
* clear all links using this accepted socket as
* outbound dynamically connected socket
*/
for (host = knet_h->host_head; host != NULL; host = host->next) {
for (link_idx = 0; link_idx < KNET_MAX_LINK; link_idx++) {
if ((host->link[link_idx].dynamic == KNET_LINK_DYNIP) &&
(host->link[link_idx].outsock == sockfd)) {
log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Found dynamic connection on host %d link %d (%d)",
host->host_id, link_idx, sockfd);
host->link[link_idx].status.dynconnected = 0;
host->link[link_idx].transport_connected = 0;
host->link[link_idx].outsock = 0;
memset(&host->link[link_idx].dst_addr, 0, sizeof(struct sockaddr_storage));
}
}
}
for (i=0; i<MAX_ACCEPTED_SOCKS; i++) {
if (sockfd == info->accepted_socks[i]) {
log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Closing accepted socket %d", sockfd);
_set_fd_tracker(knet_h, sockfd, KNET_MAX_TRANSPORTS, SCTP_NO_LINK_INFO, NULL);
info->accepted_socks[i] = -1;
free(accept_info);
close(sockfd);
}
}
}
static void *_sctp_listen_thread(void *data)
{
int savederrno;
int i, nev;
knet_handle_t knet_h = (knet_handle_t) data;
sctp_handle_info_t *handle_info = knet_h->transports[KNET_TRANSPORT_SCTP];
struct epoll_event events[KNET_EPOLL_MAX_EVENTS];
while (!shutdown_in_progress(knet_h)) {
nev = epoll_wait(handle_info->listen_epollfd, events, KNET_EPOLL_MAX_EVENTS, -1);
if (nev < 0) {
log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "SCTP listen handler EPOLL ERROR: %s",
strerror(errno));
continue;
}
savederrno = pthread_rwlock_wrlock(&knet_h->global_rwlock);
if (savederrno) {
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to get write lock: %s",
strerror(savederrno));
continue;
}
/*
* Sort out which FD has an incoming connection
*/
for (i = 0; i < nev; i++) {
if (events[i].data.fd == handle_info->listensockfd[0]) {
log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Received notification from rx_error for listener/accepted socket");
_handle_listen_sctp_errors(knet_h);
} else {
if (_is_valid_fd(knet_h, events[i].data.fd) == 1) {
_handle_incoming_sctp(knet_h, events[i].data.fd);
} else {
log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Received listen notification from invalid socket");
}
}
}
pthread_rwlock_unlock(&knet_h->global_rwlock);
}
return NULL;
}
/*
* sctp_link_listener_start/stop are called in global write lock
* context from set_config and clear_config.
*/
static sctp_listen_link_info_t *sctp_link_listener_start(knet_handle_t knet_h, struct knet_link *kn_link)
{
int err = 0, savederrno = 0;
int listen_sock = -1;
struct epoll_event ev;
sctp_listen_link_info_t *info = NULL;
sctp_handle_info_t *handle_info = knet_h->transports[KNET_TRANSPORT_SCTP];
/*
* Only allocate a new listener if src address is different
*/
knet_list_for_each_entry(info, &handle_info->listen_links_list, list) {
if (memcmp(&info->src_address, &kn_link->src_addr, sizeof(struct sockaddr_storage)) == 0) {
return info;
}
}
info = malloc(sizeof(sctp_listen_link_info_t));
if (!info) {
err = -1;
goto exit_error;
}
memset(info, 0, sizeof(sctp_listen_link_info_t));
memset(info->accepted_socks, -1, sizeof(info->accepted_socks));
memcpy(&info->src_address, &kn_link->src_addr, sizeof(struct sockaddr_storage));
listen_sock = socket(kn_link->src_addr.ss_family, SOCK_STREAM, IPPROTO_SCTP);
if (listen_sock < 0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to create listener socket: %s",
strerror(savederrno));
goto exit_error;
}
- if (_configure_sctp_socket(knet_h, listen_sock, &kn_link->src_addr, "SCTP listener") < 0) {
+ if (_configure_sctp_socket(knet_h, listen_sock, &kn_link->src_addr, kn_link->flags, "SCTP listener") < 0) {
savederrno = errno;
err = -1;
goto exit_error;
}
if (bind(listen_sock, (struct sockaddr *)&kn_link->src_addr, sockaddr_len(&kn_link->src_addr)) < 0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to bind listener socket: %s",
strerror(savederrno));
goto exit_error;
}
if (listen(listen_sock, 5) < 0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to listen on listener socket: %s",
strerror(savederrno));
goto exit_error;
}
if (_set_fd_tracker(knet_h, listen_sock, KNET_TRANSPORT_SCTP, SCTP_LISTENER_LINK_INFO, info) < 0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to set fd tracker: %s",
strerror(savederrno));
goto exit_error;
}
memset(&ev, 0, sizeof(struct epoll_event));
ev.events = EPOLLIN;
ev.data.fd = listen_sock;
if (epoll_ctl(handle_info->listen_epollfd, EPOLL_CTL_ADD, listen_sock, &ev)) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to add listener to epoll pool: %s",
strerror(savederrno));
goto exit_error;
}
info->on_listener_epoll = 1;
info->listen_sock = listen_sock;
knet_list_add(&info->list, &handle_info->listen_links_list);
log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Listening on fd %d for %s:%s", listen_sock, kn_link->status.src_ipaddr, kn_link->status.src_port);
exit_error:
if (err) {
if (info->on_listener_epoll) {
epoll_ctl(handle_info->listen_epollfd, EPOLL_CTL_DEL, listen_sock, &ev);
}
if (listen_sock >= 0) {
close(listen_sock);
}
if (info) {
free(info);
info = NULL;
}
}
errno = savederrno;
return info;
}
static int sctp_link_listener_stop(knet_handle_t knet_h, struct knet_link *kn_link)
{
int err = 0, savederrno = 0;
int found = 0, i;
struct knet_host *host;
int link_idx;
sctp_handle_info_t *handle_info = knet_h->transports[KNET_TRANSPORT_SCTP];
sctp_connect_link_info_t *this_link_info = kn_link->transport_link;
sctp_listen_link_info_t *info = this_link_info->listener;
sctp_connect_link_info_t *link_info;
struct epoll_event ev;
for (host = knet_h->host_head; host != NULL; host = host->next) {
for (link_idx = 0; link_idx < KNET_MAX_LINK; link_idx++) {
if (&host->link[link_idx] == kn_link)
continue;
link_info = host->link[link_idx].transport_link;
if ((link_info) &&
(link_info->listener == info) &&
(host->link[link_idx].status.enabled == 1)) {
found = 1;
break;
}
}
}
if (found) {
this_link_info->listener = NULL;
log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "SCTP listener socket %d still in use", info->listen_sock);
savederrno = EBUSY;
err = -1;
goto exit_error;
}
if (info->on_listener_epoll) {
memset(&ev, 0, sizeof(struct epoll_event));
ev.events = EPOLLIN;
ev.data.fd = info->listen_sock;
if (epoll_ctl(handle_info->listen_epollfd, EPOLL_CTL_DEL, info->listen_sock, &ev)) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to remove listener to epoll pool: %s",
strerror(savederrno));
goto exit_error;
}
info->on_listener_epoll = 0;
}
if (_set_fd_tracker(knet_h, info->listen_sock, KNET_MAX_TRANSPORTS, SCTP_NO_LINK_INFO, NULL) < 0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to set fd tracker: %s",
strerror(savederrno));
goto exit_error;
}
close(info->listen_sock);
for (i=0; i< MAX_ACCEPTED_SOCKS; i++) {
if (info->accepted_socks[i] > -1) {
memset(&ev, 0, sizeof(struct epoll_event));
ev.events = EPOLLIN;
ev.data.fd = info->accepted_socks[i];
if (epoll_ctl(knet_h->recv_from_links_epollfd, EPOLL_CTL_DEL, info->accepted_socks[i], &ev)) {
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to remove EOFed socket from epoll pool: %s",
strerror(errno));
}
info->on_rx_epoll = 0;
free(knet_h->knet_transport_fd_tracker[info->accepted_socks[i]].data);
close(info->accepted_socks[i]);
if (_set_fd_tracker(knet_h, info->accepted_socks[i], KNET_MAX_TRANSPORTS, SCTP_NO_LINK_INFO, NULL) < 0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to set fd tracker: %s",
strerror(savederrno));
goto exit_error;
}
info->accepted_socks[i] = -1;
}
}
knet_list_del(&info->list);
free(info);
this_link_info->listener = NULL;
exit_error:
errno = savederrno;
return err;
}
/*
* Links config/clear. Both called with global wrlock from link_set_config/clear_config
*/
static int sctp_transport_link_set_config(knet_handle_t knet_h, struct knet_link *kn_link)
{
int savederrno = 0, err = 0;
sctp_connect_link_info_t *info;
sctp_handle_info_t *handle_info = knet_h->transports[KNET_TRANSPORT_SCTP];
info = malloc(sizeof(sctp_connect_link_info_t));
if (!info) {
goto exit_error;
}
memset(info, 0, sizeof(sctp_connect_link_info_t));
kn_link->transport_link = info;
info->link = kn_link;
memcpy(&info->dst_address, &kn_link->dst_addr, sizeof(struct sockaddr_storage));
info->on_connected_epoll = 0;
info->connect_sock = -1;
info->listener = sctp_link_listener_start(knet_h, kn_link);
if (!info->listener) {
savederrno = errno;
err = -1;
goto exit_error;
}
if (kn_link->dynamic == KNET_LINK_STATIC) {
if (_create_connect_socket(knet_h, kn_link) < 0) {
savederrno = errno;
err = -1;
goto exit_error;
}
kn_link->outsock = info->connect_sock;
}
knet_list_add(&info->list, &handle_info->connect_links_list);
exit_error:
if (err) {
if (info) {
if (info->connect_sock) {
close(info->connect_sock);
}
if (info->listener) {
sctp_link_listener_stop(knet_h, kn_link);
}
kn_link->transport_link = NULL;
free(info);
}
}
errno = savederrno;
return err;
}
/*
* called with global wrlock
*/
static int sctp_transport_link_clear_config(knet_handle_t knet_h, struct knet_link *kn_link)
{
int err = 0, savederrno = 0;
sctp_connect_link_info_t *info;
struct epoll_event ev;
if (!kn_link) {
errno = EINVAL;
return -1;
}
info = kn_link->transport_link;
if (!info) {
errno = EINVAL;
return -1;
}
if ((sctp_link_listener_stop(knet_h, kn_link) <0) && (errno != EBUSY)) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to remove listener trasport: %s",
strerror(savederrno));
goto exit_error;
}
if (info->on_rx_epoll) {
memset(&ev, 0, sizeof(struct epoll_event));
ev.events = EPOLLIN;
ev.data.fd = info->connect_sock;
if (epoll_ctl(knet_h->recv_from_links_epollfd, EPOLL_CTL_DEL, info->connect_sock, &ev)) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to remove connected socket from epoll pool: %s",
strerror(savederrno));
goto exit_error;
}
info->on_rx_epoll = 0;
}
if (_close_connect_socket(knet_h, kn_link) < 0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to close connected socket: %s",
strerror(savederrno));
goto exit_error;
}
knet_list_del(&info->list);
free(info);
kn_link->transport_link = NULL;
exit_error:
errno = savederrno;
return err;
}
/*
* transport_free and transport_init are
* called only from knet_handle_new and knet_handle_free.
* all resources (hosts/links) should have been already freed at this point
* and they are called in a write locked context, hence they
* don't need their own locking.
*/
static int sctp_transport_free(knet_handle_t knet_h)
{
sctp_handle_info_t *handle_info;
void *thread_status;
struct epoll_event ev;
if (!knet_h->transports[KNET_TRANSPORT_SCTP]) {
errno = EINVAL;
return -1;
}
handle_info = knet_h->transports[KNET_TRANSPORT_SCTP];
/*
* keep it here while we debug list usage and such
*/
if (!knet_list_empty(&handle_info->listen_links_list)) {
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Internal error. listen links list is not empty");
}
if (!knet_list_empty(&handle_info->connect_links_list)) {
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Internal error. connect links list is not empty");
}
if (handle_info->listen_thread) {
pthread_cancel(handle_info->listen_thread);
pthread_join(handle_info->listen_thread, &thread_status);
}
if (handle_info->connect_thread) {
pthread_cancel(handle_info->connect_thread);
pthread_join(handle_info->connect_thread, &thread_status);
}
if (handle_info->listensockfd[0] >= 0) {
memset(&ev, 0, sizeof(struct epoll_event));
ev.events = EPOLLIN;
ev.data.fd = handle_info->listensockfd[0];
epoll_ctl(handle_info->listen_epollfd, EPOLL_CTL_DEL, handle_info->listensockfd[0], &ev);
}
if (handle_info->connectsockfd[0] >= 0) {
memset(&ev, 0, sizeof(struct epoll_event));
ev.events = EPOLLIN;
ev.data.fd = handle_info->connectsockfd[0];
epoll_ctl(handle_info->connect_epollfd, EPOLL_CTL_DEL, handle_info->connectsockfd[0], &ev);
}
_close_socketpair(knet_h, handle_info->connectsockfd);
_close_socketpair(knet_h, handle_info->listensockfd);
if (handle_info->listen_epollfd >= 0) {
close(handle_info->listen_epollfd);
}
if (handle_info->connect_epollfd >= 0) {
close(handle_info->connect_epollfd);
}
free(handle_info);
knet_h->transports[KNET_TRANSPORT_SCTP] = NULL;
return 0;
}
static int sctp_transport_init(knet_handle_t knet_h)
{
int err = 0, savederrno = 0;
sctp_handle_info_t *handle_info;
struct epoll_event ev;
if (knet_h->transports[KNET_TRANSPORT_SCTP]) {
errno = EEXIST;
return -1;
}
handle_info = malloc(sizeof(sctp_handle_info_t));
if (!handle_info) {
return -1;
}
memset(handle_info, 0,sizeof(sctp_handle_info_t));
knet_h->transports[KNET_TRANSPORT_SCTP] = handle_info;
knet_list_init(&handle_info->listen_links_list);
knet_list_init(&handle_info->connect_links_list);
handle_info->listen_epollfd = epoll_create(KNET_EPOLL_MAX_EVENTS + 1);
if (handle_info->listen_epollfd < 0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to create epoll listen fd: %s",
strerror(savederrno));
goto exit_fail;
}
if (_fdset_cloexec(handle_info->listen_epollfd)) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to set CLOEXEC on listen_epollfd: %s",
strerror(savederrno));
goto exit_fail;
}
handle_info->connect_epollfd = epoll_create(KNET_EPOLL_MAX_EVENTS + 1);
if (handle_info->connect_epollfd < 0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to create epoll connect fd: %s",
strerror(savederrno));
goto exit_fail;
}
if (_fdset_cloexec(handle_info->connect_epollfd)) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to set CLOEXEC on connect_epollfd: %s",
strerror(savederrno));
goto exit_fail;
}
if (_init_socketpair(knet_h, handle_info->connectsockfd) < 0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to init connect socketpair: %s",
strerror(savederrno));
goto exit_fail;
}
memset(&ev, 0, sizeof(struct epoll_event));
ev.events = EPOLLIN;
ev.data.fd = handle_info->connectsockfd[0];
if (epoll_ctl(handle_info->connect_epollfd, EPOLL_CTL_ADD, handle_info->connectsockfd[0], &ev)) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to add connectsockfd[0] to connect epoll pool: %s",
strerror(savederrno));
goto exit_fail;
}
if (_init_socketpair(knet_h, handle_info->listensockfd) < 0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to init listen socketpair: %s",
strerror(savederrno));
goto exit_fail;
}
memset(&ev, 0, sizeof(struct epoll_event));
ev.events = EPOLLIN;
ev.data.fd = handle_info->listensockfd[0];
if (epoll_ctl(handle_info->listen_epollfd, EPOLL_CTL_ADD, handle_info->listensockfd[0], &ev)) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to add listensockfd[0] to listen epoll pool: %s",
strerror(savederrno));
goto exit_fail;
}
/*
* Start connect & listener threads
*/
savederrno = pthread_create(&handle_info->listen_thread, 0, _sctp_listen_thread, (void *) knet_h);
if (savederrno) {
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to start sctp listen thread: %s",
strerror(savederrno));
goto exit_fail;
}
savederrno = pthread_create(&handle_info->connect_thread, 0, _sctp_connect_thread, (void *) knet_h);
if (savederrno) {
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to start sctp connect thread: %s",
strerror(savederrno));
goto exit_fail;
}
exit_fail:
if (err < 0) {
sctp_transport_free(knet_h);
}
errno = savederrno;
return err;
}
static int sctp_transport_link_dyn_connect(knet_handle_t knet_h, int sockfd, struct knet_link *kn_link)
{
kn_link->outsock = sockfd;
kn_link->status.dynconnected = 1;
kn_link->transport_connected = 1;
return 0;
}
static knet_transport_ops_t sctp_transport_ops = {
.transport_name = "SCTP",
.transport_id = KNET_TRANSPORT_SCTP,
.transport_mtu_overhead = KNET_PMTUD_SCTP_OVERHEAD,
.transport_init = sctp_transport_init,
.transport_free = sctp_transport_free,
.transport_link_set_config = sctp_transport_link_set_config,
.transport_link_clear_config = sctp_transport_link_clear_config,
.transport_link_dyn_connect = sctp_transport_link_dyn_connect,
.transport_rx_sock_error = sctp_transport_rx_sock_error,
.transport_tx_sock_error = sctp_transport_tx_sock_error,
.transport_rx_is_data = sctp_transport_rx_is_data,
};
knet_transport_ops_t *get_sctp_transport()
{
return &sctp_transport_ops;
}
#else // HAVE_NETINET_SCTP_H
knet_transport_ops_t *get_sctp_transport()
{
return NULL;
}
#endif
diff --git a/libknet/transport_udp.c b/libknet/transport_udp.c
index fb4237a5..5a3be305 100644
--- a/libknet/transport_udp.c
+++ b/libknet/transport_udp.c
@@ -1,408 +1,408 @@
#include "config.h"
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <stdlib.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/ip_icmp.h>
#if defined (IP_RECVERR) || defined (IPV6_RECVERR)
#include <linux/errqueue.h>
#endif
#include "libknet.h"
#include "compat.h"
#include "host.h"
#include "link.h"
#include "logging.h"
#include "common.h"
#include "transports.h"
#include "threads_common.h"
#define KNET_PMTUD_UDP_OVERHEAD 8
typedef struct udp_handle_info {
struct knet_list_head links_list;
} udp_handle_info_t;
typedef struct udp_link_info {
struct knet_list_head list;
struct sockaddr_storage local_address;
int socket_fd;
int on_epoll;
} udp_link_info_t;
static int udp_transport_link_set_config(knet_handle_t knet_h, struct knet_link *kn_link)
{
int err = 0, savederrno = 0;
int sock = -1;
struct epoll_event ev;
udp_link_info_t *info;
udp_handle_info_t *handle_info = knet_h->transports[KNET_TRANSPORT_UDP];
#if defined (IP_RECVERR) || defined (IPV6_RECVERR)
int value;
#endif
/*
* Only allocate a new link if the local address is different
*/
knet_list_for_each_entry(info, &handle_info->links_list, list) {
if (memcmp(&info->local_address, &kn_link->src_addr, sizeof(struct sockaddr_storage)) == 0) {
log_debug(knet_h, KNET_SUB_TRANSP_UDP, "Re-using existing UDP socket for new link");
kn_link->outsock = info->socket_fd;
kn_link->transport_link = info;
kn_link->transport_connected = 1;
return 0;
}
}
info = malloc(sizeof(udp_link_info_t));
if (!info) {
err = -1;
goto exit_error;
}
sock = socket(kn_link->src_addr.ss_family, SOCK_DGRAM, 0);
if (sock < 0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_LISTENER, "Unable to create listener socket: %s",
strerror(savederrno));
goto exit_error;
}
- if (_configure_transport_socket(knet_h, sock, &kn_link->src_addr, "UDP") < 0) {
+ if (_configure_transport_socket(knet_h, sock, &kn_link->src_addr, kn_link->flags, "UDP") < 0) {
savederrno = errno;
err = -1;
goto exit_error;
}
#ifdef IP_RECVERR
if (kn_link->src_addr.ss_family == AF_INET) {
value = 1;
if (setsockopt(sock, SOL_IP, IP_RECVERR, &value, sizeof(value)) <0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_UDP, "Unable to set RECVERR on socket: %s",
strerror(savederrno));
goto exit_error;
}
}
#endif
#ifdef IPV6_RECVERR
if (kn_link->src_addr.ss_family == AF_INET6) {
value = 1;
if (setsockopt(sock, SOL_IPV6, IPV6_RECVERR, &value, sizeof(value)) <0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_UDP, "Unable to set RECVERR on socket: %s",
strerror(savederrno));
goto exit_error;
}
}
#endif
if (bind(sock, (struct sockaddr *)&kn_link->src_addr, sockaddr_len(&kn_link->src_addr))) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_UDP, "Unable to bind listener socket: %s",
strerror(savederrno));
goto exit_error;
}
memset(&ev, 0, sizeof(struct epoll_event));
ev.events = EPOLLIN;
ev.data.fd = sock;
if (epoll_ctl(knet_h->recv_from_links_epollfd, EPOLL_CTL_ADD, sock, &ev)) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_UDP, "Unable to add listener to epoll pool: %s",
strerror(savederrno));
goto exit_error;
}
info->on_epoll = 1;
if (_set_fd_tracker(knet_h, sock, KNET_TRANSPORT_UDP, 0, info) < 0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_UDP, "Unable to set fd tracker: %s",
strerror(savederrno));
goto exit_error;
}
memcpy(&info->local_address, &kn_link->src_addr, sizeof(struct sockaddr_storage));
info->socket_fd = sock;
knet_list_add(&info->list, &handle_info->links_list);
kn_link->outsock = sock;
kn_link->transport_link = info;
kn_link->transport_connected = 1;
exit_error:
if (err) {
if (info) {
if (info->on_epoll) {
epoll_ctl(knet_h->recv_from_links_epollfd, EPOLL_CTL_DEL, sock, &ev);
}
free(info);
}
if (sock >= 0) {
close(sock);
}
}
errno = savederrno;
return err;
}
static int udp_transport_link_clear_config(knet_handle_t knet_h, struct knet_link *kn_link)
{
int err = 0, savederrno = 0;
int found = 0;
struct knet_host *host;
int link_idx;
udp_link_info_t *info = kn_link->transport_link;
struct epoll_event ev;
for (host = knet_h->host_head; host != NULL; host = host->next) {
for (link_idx = 0; link_idx < KNET_MAX_LINK; link_idx++) {
if (&host->link[link_idx] == kn_link)
continue;
if ((host->link[link_idx].transport_link == info) &&
(host->link[link_idx].status.enabled == 1)) {
found = 1;
break;
}
}
}
if (found) {
log_debug(knet_h, KNET_SUB_TRANSP_UDP, "UDP socket %d still in use", info->socket_fd);
savederrno = EBUSY;
err = -1;
goto exit_error;
}
if (info->on_epoll) {
memset(&ev, 0, sizeof(struct epoll_event));
ev.events = EPOLLIN;
ev.data.fd = info->socket_fd;
if (epoll_ctl(knet_h->recv_from_links_epollfd, EPOLL_CTL_DEL, info->socket_fd, &ev) < 0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_UDP, "Unable to remove UDP socket from epoll poll: %s",
strerror(errno));
goto exit_error;
}
info->on_epoll = 0;
}
if (_set_fd_tracker(knet_h, info->socket_fd, KNET_MAX_TRANSPORTS, 0, NULL) < 0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_UDP, "Unable to set fd tracker: %s",
strerror(savederrno));
goto exit_error;
}
close(info->socket_fd);
knet_list_del(&info->list);
free(kn_link->transport_link);
exit_error:
errno = savederrno;
return err;
}
static int udp_transport_free(knet_handle_t knet_h)
{
udp_handle_info_t *handle_info;
if (!knet_h->transports[KNET_TRANSPORT_UDP]) {
errno = EINVAL;
return -1;
}
handle_info = knet_h->transports[KNET_TRANSPORT_UDP];
/*
* keep it here while we debug list usage and such
*/
if (!knet_list_empty(&handle_info->links_list)) {
log_err(knet_h, KNET_SUB_TRANSP_UDP, "Internal error. handle list is not empty");
return -1;
}
free(handle_info);
knet_h->transports[KNET_TRANSPORT_UDP] = NULL;
return 0;
}
static int udp_transport_init(knet_handle_t knet_h)
{
udp_handle_info_t *handle_info;
if (knet_h->transports[KNET_TRANSPORT_UDP]) {
errno = EEXIST;
return -1;
}
handle_info = malloc(sizeof(udp_handle_info_t));
if (!handle_info) {
return -1;
}
memset(handle_info, 0, sizeof(udp_handle_info_t));
knet_h->transports[KNET_TRANSPORT_UDP] = handle_info;
knet_list_init(&handle_info->links_list);
return 0;
}
#if defined (IP_RECVERR) || defined (IPV6_RECVERR)
static int read_errs_from_sock(knet_handle_t knet_h, int sockfd)
{
int err = 0, savederrno = 0;
int got_err = 0;
char buffer[1024];
struct iovec iov;
struct msghdr msg;
struct cmsghdr *cmsg;
struct sock_extended_err *sock_err;
struct icmphdr icmph;
struct sockaddr_storage remote;
struct sockaddr_storage *origin;
char addr_str[KNET_MAX_HOST_LEN];
char port_str[KNET_MAX_PORT_LEN];
iov.iov_base = &icmph;
iov.iov_len = sizeof(icmph);
msg.msg_name = (void*)&remote;
msg.msg_namelen = sizeof(remote);
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
msg.msg_flags = 0;
msg.msg_control = buffer;
msg.msg_controllen = sizeof(buffer);
for (;;) {
err = recvmsg(sockfd, &msg, MSG_ERRQUEUE);
savederrno = errno;
if (err < 0) {
if (!got_err) {
errno = savederrno;
return -1;
} else {
return 0;
}
}
got_err = 1;
for (cmsg = CMSG_FIRSTHDR(&msg);cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg)) {
if (((cmsg->cmsg_level == SOL_IP) && (cmsg->cmsg_type == IP_RECVERR)) ||
((cmsg->cmsg_level == SOL_IPV6 && (cmsg->cmsg_type == IPV6_RECVERR)))) {
sock_err = (struct sock_extended_err*)(void *)CMSG_DATA(cmsg);
if (sock_err) {
switch (sock_err->ee_origin) {
case 0: /* no origin */
case 1: /* local source (EMSGSIZE) */
/*
* those errors are way too noisy
*/
break;
case 2: /* ICMP */
case 3: /* ICMP6 */
origin = (struct sockaddr_storage *)(void *)SO_EE_OFFENDER(sock_err);
if (knet_addrtostr(origin, sizeof(origin),
addr_str, KNET_MAX_HOST_LEN,
port_str, KNET_MAX_PORT_LEN) < 0) {
log_debug(knet_h, KNET_SUB_TRANSP_UDP, "Received ICMP error from unknown source: %s", strerror(sock_err->ee_errno));
} else {
log_debug(knet_h, KNET_SUB_TRANSP_UDP, "Received ICMP error from %s: %s", addr_str, strerror(sock_err->ee_errno));
}
break;
}
} else {
log_debug(knet_h, KNET_SUB_TRANSP_UDP, "No data in MSG_ERRQUEUE");
}
}
}
}
}
#else
static int read_errs_from_sock(knet_handle_t knet_h, int sockfd)
{
return 0;
}
#endif
static int udp_transport_rx_sock_error(knet_handle_t knet_h, int sockfd, int recv_err, int recv_errno)
{
if (recv_errno == EAGAIN) {
read_errs_from_sock(knet_h, sockfd);
}
return 0;
}
static int udp_transport_tx_sock_error(knet_handle_t knet_h, int sockfd, int recv_err, int recv_errno)
{
if (recv_err < 0) {
if ((recv_errno == ENOBUFS) || (recv_errno == EAGAIN)) {
#ifdef DEBUG
log_debug(knet_h, KNET_SUB_TRANSP_UDP, "Sock: %d is overloaded. Slowing TX down", sockfd);
#endif
usleep(KNET_THREADS_TIMERES / 16);
return 1;
}
read_errs_from_sock(knet_h, sockfd);
if (recv_errno == EMSGSIZE) {
return 0;
}
return -1;
}
return 0;
}
static int udp_transport_rx_is_data(knet_handle_t knet_h, int sockfd, struct knet_mmsghdr *msg)
{
if (msg->msg_len == 0)
return 0;
return 2;
}
static int udp_transport_link_dyn_connect(knet_handle_t knet_h, int sockfd, struct knet_link *kn_link)
{
kn_link->status.dynconnected = 1;
return 0;
}
static knet_transport_ops_t udp_transport_ops = {
.transport_name = "UDP",
.transport_id = KNET_TRANSPORT_UDP,
.transport_mtu_overhead = KNET_PMTUD_UDP_OVERHEAD,
.transport_init = udp_transport_init,
.transport_free = udp_transport_free,
.transport_link_set_config = udp_transport_link_set_config,
.transport_link_clear_config = udp_transport_link_clear_config,
.transport_link_dyn_connect = udp_transport_link_dyn_connect,
.transport_rx_sock_error = udp_transport_rx_sock_error,
.transport_tx_sock_error = udp_transport_tx_sock_error,
.transport_rx_is_data = udp_transport_rx_is_data,
};
knet_transport_ops_t *get_udp_transport()
{
return &udp_transport_ops;
}
diff --git a/libknet/transports.h b/libknet/transports.h
index 391d1714..58e2e850 100644
--- a/libknet/transports.h
+++ b/libknet/transports.h
@@ -1,27 +1,27 @@
/*
* Copyright (C) 2016 Red Hat, Inc. All rights reserved.
*
* Authors: Fabio M. Di Nitto <fabbione@kronosnet.org>
*
* This software licensed under GPL-2.0+, LGPL-2.0+
*/
#ifndef __KNET_TRANSPORTS_H__
#define __KNET_TRANSPORTS_H__
knet_transport_ops_t *get_udp_transport(void);
knet_transport_ops_t *get_sctp_transport(void);
-int _configure_common_socket(knet_handle_t knet_h, int sock, const char *type);
-int _configure_transport_socket(knet_handle_t knet_h, int sock, struct sockaddr_storage *address, const char *type);
+int _configure_common_socket(knet_handle_t knet_h, int sock, uint64_t flags, const char *type);
+int _configure_transport_socket(knet_handle_t knet_h, int sock, struct sockaddr_storage *address, uint64_t flags, const char *type);
int _init_socketpair(knet_handle_t knet_h, int *sock);
void _close_socketpair(knet_handle_t knet_h, int *sock);
int _set_fd_tracker(knet_handle_t knet_h, int sockfd, uint8_t transport, uint8_t data_type, void *data);
int _is_valid_fd(knet_handle_t knet_h, int sockfd);
int _sendmmsg(int sockfd, struct knet_mmsghdr *msgvec, unsigned int vlen, unsigned int flags);
int _recvmmsg(int sockfd, struct knet_mmsghdr *msgvec, unsigned int vlen, unsigned int flags);
#endif

File Metadata

Mime Type
text/x-diff
Expires
Wed, Feb 26, 10:30 PM (9 h, 41 m ago)
Storage Engine
blob
Storage Format
Raw Data
Storage Handle
1465825
Default Alt Text
(122 KB)

Event Timeline