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diff --git a/libnozzle/internals.c b/libnozzle/internals.c
index be81b569..2a385db8 100644
--- a/libnozzle/internals.c
+++ b/libnozzle/internals.c
@@ -1,1259 +1,1151 @@
/*
* Copyright (C) 2010-2017 Red Hat, Inc. All rights reserved.
*
* Author: Fabio M. Di Nitto <fabbione@kronosnet.org>
*
* This software licensed under GPL-2.0+, LGPL-2.0+
*/
#include "config.h"
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <unistd.h>
#include <limits.h>
#include <stdio.h>
#include <stdint.h>
#include "libnozzle.h"
#include "internals.h"
static int read_pipe(int fd, char **file, size_t *length)
{
char buf[4096];
int n;
int done = 0;
*file = NULL;
*length = 0;
memset(buf, 0, sizeof(buf));
while (!done) {
n = read(fd, buf, sizeof(buf));
if (n < 0) {
if (errno == EINTR)
continue;
if (*file)
free(*file);
return n;
}
if (n == 0 && (!*length))
return 0;
if (n == 0)
done = 1;
if (*file)
*file = realloc(*file, (*length) + n + done);
else
*file = malloc(n + done);
if (!*file)
return -1;
memmove((*file) + (*length), buf, n);
*length += (done + n);
}
/* Null terminator */
(*file)[(*length) - 1] = 0;
return 0;
}
int execute_bin_sh_command(const char *command, char **error_string)
{
pid_t pid;
int status, err = 0;
int fd[2];
size_t size = 0;
if ((command == NULL) || (!error_string)) {
errno = EINVAL;
return -1;
}
*error_string = NULL;
err = pipe(fd);
if (err)
goto out_clean;
pid = fork();
if (pid < 0) {
err = pid;
goto out_clean;
}
if (pid) { /* parent */
close(fd[1]);
err = read_pipe(fd[0], error_string, &size);
if (err)
goto out_clean0;
waitpid(pid, &status, 0);
if (!WIFEXITED(status)) {
err = -1;
goto out_clean0;
}
if (WIFEXITED(status) && WEXITSTATUS(status) != 0) {
err = WEXITSTATUS(status);
goto out_clean0;
}
goto out_clean0;
} else { /* child */
close(0);
close(1);
close(2);
close(fd[0]);
dup2(fd[1], 1);
dup2(fd[1], 2);
close(fd[1]);
execlp("/bin/sh", "/bin/sh", "-c", command, NULL);
exit(EXIT_FAILURE);
}
out_clean:
close(fd[1]);
out_clean0:
close(fd[0]);
return err;
}
int run_updown(const nozzle_t nozzle, const char *action, char **error_string)
{
char command[PATH_MAX];
struct stat sb;
int err = 0;
if (!nozzle->hasupdown)
return 0;
memset(command, 0, PATH_MAX);
snprintf(command, PATH_MAX, "%s%s/%s", nozzle->updownpath, action, nozzle->name);
err = stat(command, &sb);
if ((err < 0) && (errno == ENOENT))
return 0;
err = execute_bin_sh_command(command, error_string);
if ((!err) && (*error_string)) {
free(*error_string);
*error_string = NULL;
}
return err;
}
#if 0
-static int _check(const nozzle_t nozzle)
-{
- nozzle_t temp = lib_cfg.head;
-
- if (!nozzle) {
- return 0;
- }
-
- while (temp != NULL) {
- if (nozzle == temp)
- return 1;
-
- temp = temp->next;
- }
-
- return 0;
-}
-
static void _close(nozzle_t nozzle)
{
#ifdef KNET_BSD
struct ifreq ifr;
#endif
if (!nozzle)
return;
if (nozzle->fd)
close(nozzle->fd);
#ifdef KNET_BSD
memset(&ifr, 0, sizeof(struct ifreq));
strncpy(ifname, nozzle->name, IFNAMSIZ);
ioctl(lib_cfg.ioctlfd, SIOCIFDESTROY, &ifr);
#endif
free(nozzle);
return;
}
static void _close_cfg(void)
{
if (lib_cfg.head == NULL) {
close(lib_cfg.ioctlfd);
lib_init = 0;
}
}
static int _get_mtu(const nozzle_t nozzle)
{
int err = 0, savederrno = 0;
struct ifreq ifr;
memset(&ifr, 0, sizeof(struct ifreq));
strncpy(ifname, nozzle->name, IFNAMSIZ);
err = ioctl(lib_cfg.ioctlfd, SIOCGIFMTU, &ifr);
if (err) {
savederrno = errno;
goto out_clean;
}
err = ifr.ifr_mtu;
out_clean:
errno = savederrno;
return err;
}
static int _get_mac(const nozzle_t nozzle, char **ether_addr)
{
int err = 0, savederrno = 0;
struct ifreq ifr;
char mac[MACADDR_CHAR_MAX];
#ifdef KNET_BSD
struct ifaddrs *ifap = NULL;
struct ifaddrs *ifa;
int found = 0;
#endif
memset(&mac, 0, MACADDR_CHAR_MAX);
memset(&ifr, 0, sizeof(struct ifreq));
strncpy(ifname, nozzle->name, IFNAMSIZ);
#ifdef KNET_LINUX
err = ioctl(lib_cfg.ioctlfd, SIOCGIFHWADDR, &ifr);
if (err) {
savederrno = errno;
goto out_clean;
}
ether_ntoa_r((struct ether_addr *)ifr.ifr_hwaddr.sa_data, mac);
#endif
#ifdef KNET_BSD
/*
* there is no ioctl to get the ether address of an interface on FreeBSD
* (not to be confused with hwaddr). Use workaround described here:
* https://lists.freebsd.org/pipermail/freebsd-hackers/2004-June/007394.html
*/
err = getifaddrs(&ifap);
if (err < 0) {
savederrno = errno;
goto out_clean;
}
ifa = ifap;
while (ifa) {
if (!strncmp(nozzle->name, ifa->ifa_name, IFNAMSIZ)) {
found = 1;
break;
}
ifa=ifa->ifa_next;
}
if (found) {
ether_ntoa_r((struct ether_addr *)LLADDR((struct sockaddr_dl *)ifa->ifa_addr), mac);
} else {
errno = EINVAL;
err = -1;
}
freeifaddrs(ifap);
if (err) {
goto out_clean;
}
#endif
*ether_addr = strdup(mac);
if (!*ether_addr) {
savederrno = errno;
err = -1;
}
out_clean:
errno = savederrno;
return err;
}
-nozzle_t nozzle_get_handle_by_name(char *devname)
-{
- int savederrno = 0;
- nozzle_t nozzle;
-
- if ((devname == NULL) || (strlen(devname) > IFNAMSIZ)) {
- errno = EINVAL;
- return NULL;
- }
-
- savederrno = pthread_mutex_lock(&config_mutex);
- if (savederrno) {
- errno = savederrno;
- return NULL;
- }
-
- nozzle = lib_cfg.head;
- while (nozzle != NULL) {
- if (!strcmp(devname, nozzle->name))
- break;
- nozzle = nozzle->next;
- }
-
- if (!nozzle) {
- savederrno = ENOENT;
- }
-
- pthread_mutex_unlock(&config_mutex);
- errno = savederrno;
- return nozzle;
-}
-
nozzle_t nozzle_open(char *devname, size_t devname_size, const char *updownpath)
{
int savederrno = 0;
nozzle_t nozzle = NULL;
char *temp_mac = NULL;
#ifdef KNET_LINUX
struct ifreq ifr;
#endif
#ifdef KNET_BSD
uint16_t i;
long int nozzlenum = 0;
char curnozzle[IFNAMSIZ];
#endif
if (devname == NULL) {
errno = EINVAL;
return NULL;
}
if (devname_size < IFNAMSIZ) {
errno = EINVAL;
return NULL;
}
if (strlen(devname) > IFNAMSIZ) {
errno = E2BIG;
return NULL;
}
#ifdef KNET_BSD
/*
* BSD does not support named devices like Linux
* but it is possible to force a nozzleX device number
* where X is 0 to 255.
*/
if (strlen(devname)) {
if (strncmp(devname, "tap", 3)) {
errno = EINVAL;
return NULL;
}
errno = 0;
nozzlenum = strtol(devname+3, NULL, 10);
if (errno) {
errno = EINVAL;
return NULL;
}
if ((nozzlenum < 0) || (nozzlenum > 255)) {
errno = EINVAL;
return NULL;
}
}
#endif
if (updownpath) {
/* only absolute paths */
if (updownpath[0] != '/') {
errno = EINVAL;
return NULL;
}
if (strlen(updownpath) >= UPDOWN_PATH_MAX) {
errno = E2BIG;
return NULL;
}
}
savederrno = pthread_mutex_lock(&config_mutex);
if (savederrno) {
errno = savederrno;
return NULL;
}
if (!lib_init) {
lib_cfg.head = NULL;
#ifdef KNET_LINUX
lib_cfg.ioctlfd = socket(AF_INET, SOCK_STREAM, 0);
#endif
#ifdef KNET_BSD
lib_cfg.ioctlfd = socket(AF_LOCAL, SOCK_DGRAM, 0);
#endif
if (lib_cfg.ioctlfd < 0) {
savederrno = errno;
goto out_error;
}
lib_init = 1;
}
nozzle = malloc(sizeof(struct nozzle_iface));
if (!nozzle) {
savederrno = ENOMEM;
goto out_error;
}
memset(nozzle, 0, sizeof(struct nozzle_iface));
#ifdef KNET_BSD
if (!strlen(devname)) {
for (i = 0; i < 256; i++) {
snprintf(curnozzle, sizeof(curnozzle) - 1, "/dev/tap%u", i);
nozzle->fd = open(curnozzle, O_RDWR);
savederrno = errno;
if (nozzle->fd > 0) {
break;
}
}
snprintf(curnozzle, sizeof(curnozzle) -1 , "tap%u", i);
} else {
snprintf(curnozzle, sizeof(curnozzle) - 1, "/dev/%s", devname);
nozzle->fd = open(curnozzle, O_RDWR);
savederrno = errno;
snprintf(curnozzle, sizeof(curnozzle) - 1, "%s", devname);
}
if (nozzle->fd < 0) {
errno = EBUSY;
goto out_error;
}
strncpy(devname, curnozzle, IFNAMSIZ);
strncpy(nozzle->name, curnozzle, IFNAMSIZ);
#endif
#ifdef KNET_LINUX
if ((nozzle->fd = open("/dev/net/tun", O_RDWR)) < 0) {
savederrno = errno;
goto out_error;
}
memset(&ifr, 0, sizeof(struct ifreq));
strncpy(ifname, devname, IFNAMSIZ);
ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
if (ioctl(nozzle->fd, TUNSETIFF, &ifr) < 0) {
savederrno = errno;
goto out_error;
}
if ((strlen(devname) > 0) && (strcmp(devname, ifname) != 0)) {
errno = EBUSY;
goto out_error;
}
strncpy(devname, ifname, IFNAMSIZ);
strncpy(nozzle->name, ifname, IFNAMSIZ);
#endif
nozzle->default_mtu = _get_mtu(nozzle);
if (nozzle->default_mtu < 0) {
savederrno = errno;
goto out_error;
}
if (_get_mac(nozzle, &temp_mac) < 0) {
savederrno = errno;
goto out_error;
}
strncpy(nozzle->default_mac, temp_mac, 18);
free(temp_mac);
if (updownpath) {
int len = strlen(updownpath);
strcpy(nozzle->updownpath, updownpath);
if (nozzle->updownpath[len-1] != '/') {
nozzle->updownpath[len] = '/';
}
nozzle->hasupdown = 1;
}
nozzle->next = lib_cfg.head;
lib_cfg.head = nozzle;
pthread_mutex_unlock(&config_mutex);
errno = savederrno;
return nozzle;
out_error:
_close(nozzle);
_close_cfg();
pthread_mutex_unlock(&config_mutex);
errno = savederrno;
return NULL;
}
int nozzle_close(nozzle_t nozzle, char **error_down, char **error_postdown)
{
int err = 0, savederrno = 0;
nozzle_t temp = lib_cfg.head;
nozzle_t prev = lib_cfg.head;
struct nozzle_ip *ip, *ip_next;
char *error_string = NULL;
savederrno = pthread_mutex_lock(&config_mutex);
if (savederrno) {
errno = savederrno;
return -1;
}
if (!_check(nozzle)) {
savederrno = EINVAL;
err = -1;
goto out_clean;
}
while ((temp) && (temp != nozzle)) {
prev = temp;
temp = temp->next;
}
if (nozzle == prev) {
lib_cfg.head = nozzle->next;
} else {
prev->next = nozzle->next;
}
_set_down(nozzle, error_down, error_postdown);
ip = nozzle->ip;
while (ip) {
ip_next = ip->next;
_set_ip(nozzle, "del", ip->ipaddr, ip->prefix, &error_string, 0);
if (error_string) {
free(error_string);
error_string = NULL;
}
free(ip);
ip = ip_next;
}
_close(nozzle);
_close_cfg();
out_clean:
pthread_mutex_unlock(&config_mutex);
errno = savederrno;
return err;
}
int nozzle_get_mtu(const nozzle_t nozzle)
{
int err = 0, savederrno = 0;
if (!nozzle) {
errno = EINVAL;
return -1;
}
savederrno = pthread_mutex_lock(&config_mutex);
if (savederrno) {
errno = savederrno;
return -1;
}
if (!_check(nozzle)) {
errno = EINVAL;
err = -1;
goto out_clean;
}
err = _get_mtu(nozzle);
savederrno = errno;
out_clean:
pthread_mutex_unlock(&config_mutex);
savederrno = errno;
return err;
}
int nozzle_set_mtu(nozzle_t nozzle, const int mtu, char **error_string)
{
int err = 0, savederrno = 0;
struct nozzle_ip *tmp_ip;
struct ifreq ifr;
if ((!nozzle) || (!mtu) || (!error_string)) {
errno = EINVAL;
return -1;
}
savederrno = pthread_mutex_lock(&config_mutex);
if (savederrno) {
errno = savederrno;
return -1;
}
if (!_check(nozzle)) {
errno = EINVAL;
err = -1;
goto out_clean;
}
err = nozzle->current_mtu = _get_mtu(nozzle);
if (err < 0) {
savederrno = errno;
goto out_clean;
}
memset(&ifr, 0, sizeof(struct ifreq));
strncpy(ifname, nozzle->name, IFNAMSIZ);
ifr.ifr_mtu = mtu;
err = ioctl(lib_cfg.ioctlfd, SIOCSIFMTU, &ifr);
if (err) {
savederrno = errno;
goto out_clean;
}
if ((nozzle->current_mtu < 1280) && (mtu >= 1280)) {
tmp_ip = nozzle->ip;
while(tmp_ip) {
if (tmp_ip->domain == AF_INET6) {
err = _set_ip(nozzle, "add", tmp_ip->ipaddr, tmp_ip->prefix, error_string, 0);
if (err) {
savederrno = errno;
err = -1;
goto out_clean;
}
}
tmp_ip = tmp_ip->next;
}
}
out_clean:
pthread_mutex_unlock(&config_mutex);
errno = savederrno;
return err;
}
int nozzle_reset_mtu(nozzle_t nozzle, char **error_string)
{
return nozzle_set_mtu(nozzle, nozzle->default_mtu, error_string);
}
int nozzle_get_mac(const nozzle_t nozzle, char **ether_addr)
{
int err = 0, savederrno = 0;
if ((!nozzle) || (!ether_addr)) {
errno = EINVAL;
return -1;
}
savederrno = pthread_mutex_lock(&config_mutex);
if (savederrno) {
errno = savederrno;
return -1;
}
if (!_check(nozzle)) {
errno = EINVAL;
err = -1;
goto out_clean;
}
err = _get_mac(nozzle, ether_addr);
out_clean:
pthread_mutex_unlock(&config_mutex);
errno = savederrno;
return err;
}
int nozzle_set_mac(nozzle_t nozzle, const char *ether_addr)
{
int err = 0, savederrno = 0;
struct ifreq ifr;
if ((!nozzle) || (!ether_addr)) {
errno = EINVAL;
return -1;
}
savederrno = pthread_mutex_lock(&config_mutex);
if (savederrno) {
errno = savederrno;
return -1;
}
if (!_check(nozzle)) {
errno = EINVAL;
err = -1;
goto out_clean;
}
memset(&ifr, 0, sizeof(struct ifreq));
strncpy(ifname, nozzle->name, IFNAMSIZ);
#ifdef KNET_LINUX
err = ioctl(lib_cfg.ioctlfd, SIOCGIFHWADDR, &ifr);
if (err) {
savederrno = errno;
goto out_clean;
}
memmove(ifr.ifr_hwaddr.sa_data, ether_aton(ether_addr), ETH_ALEN);
err = ioctl(lib_cfg.ioctlfd, SIOCSIFHWADDR, &ifr);
savederrno = errno;
#endif
#ifdef KNET_BSD
err = ioctl(lib_cfg.ioctlfd, SIOCGIFADDR, &ifr);
if (err) {
savederrno = errno;
goto out_clean;
}
memmove(ifr.ifr_addr.sa_data, ether_aton(ether_addr), ETHER_ADDR_LEN);
ifr.ifr_addr.sa_len = ETHER_ADDR_LEN;
err = ioctl(lib_cfg.ioctlfd, SIOCSIFLLADDR, &ifr);
savederrno = errno;
#endif
out_clean:
pthread_mutex_unlock(&config_mutex);
errno = savederrno;
return err;
}
int nozzle_reset_mac(nozzle_t nozzle)
{
return nozzle_set_mac(nozzle, nozzle->default_mac);
}
int nozzle_set_up(nozzle_t nozzle, char **error_preup, char **error_up)
{
int err = 0, savederrno = 0;
struct ifreq ifr;
if (!nozzle) {
errno = EINVAL;
return -1;
}
savederrno = pthread_mutex_lock(&config_mutex);
if (savederrno) {
errno = savederrno;
return -1;
}
if (!_check(nozzle)) {
savederrno = EINVAL;
err = -1;
goto out_clean;
}
if ((nozzle->hasupdown) && ((!error_preup) || (!error_up))) {
savederrno = EINVAL;
err = -1;
goto out_clean;
}
if (nozzle->up) {
goto out_clean;
}
memset(&ifr, 0, sizeof(struct ifreq));
strncpy(ifname, nozzle->name, IFNAMSIZ);
err = ioctl(lib_cfg.ioctlfd, SIOCGIFFLAGS, &ifr);
if (err) {
savederrno = errno;
goto out_clean;
}
_exec_updown(nozzle, "pre-up.d", error_preup);
ifr.ifr_flags |= IFF_UP | IFF_RUNNING;
err = ioctl(lib_cfg.ioctlfd, SIOCSIFFLAGS, &ifr);
if (err) {
savederrno = errno;
goto out_clean;
}
_exec_updown(nozzle, "up.d", error_up);
nozzle->up = 1;
out_clean:
pthread_mutex_unlock(&config_mutex);
errno = savederrno;
return err;
}
static int _set_down(nozzle_t nozzle, char **error_down, char **error_postdown)
{
int err = 0, savederrno = 0;
struct ifreq ifr;
if (!nozzle->up) {
goto out_clean;
}
memset(&ifr, 0, sizeof(struct ifreq));
strncpy(ifname, nozzle->name, IFNAMSIZ);
err = ioctl(lib_cfg.ioctlfd, SIOCGIFFLAGS, &ifr);
if (err) {
savederrno = errno;
goto out_clean;
}
_exec_updown(nozzle, "down.d", error_down);
ifr.ifr_flags &= ~IFF_UP;
err = ioctl(lib_cfg.ioctlfd, SIOCSIFFLAGS, &ifr);
if (err) {
savederrno = errno;
goto out_clean;
}
_exec_updown(nozzle, "post-down.d", error_postdown);
nozzle->up = 0;
out_clean:
errno = savederrno;
return err;
}
int nozzle_set_down(nozzle_t nozzle, char **error_down, char **error_postdown)
{
int err = 0, savederrno = 0;
if (!nozzle) {
errno = EINVAL;
return -1;
}
savederrno = pthread_mutex_lock(&config_mutex);
if (savederrno) {
errno = savederrno;
return -1;
}
if (!_check(nozzle)) {
savederrno = EINVAL;
err = -1;
goto out_clean;
}
if ((nozzle->hasupdown) && ((!error_down) || (!error_postdown))) {
savederrno = EINVAL;
err = -1;
goto out_clean;
}
err = _set_down(nozzle, error_down, error_postdown);
savederrno = errno;
out_clean:
pthread_mutex_unlock(&config_mutex);
errno = savederrno;
return err;
}
static char *_get_v4_broadcast(const char *ipaddr, const char *prefix)
{
int prefix_len;
struct in_addr mask;
struct in_addr broadcast;
struct in_addr address;
prefix_len = atoi(prefix);
if ((prefix_len > 32) || (prefix_len < 0))
return NULL;
if (inet_pton(AF_INET, ipaddr, &address) <= 0)
return NULL;
mask.s_addr = htonl(~((1 << (32 - prefix_len)) - 1));
memset(&broadcast, 0, sizeof(broadcast));
broadcast.s_addr = (address.s_addr & mask.s_addr) | ~mask.s_addr;
return strdup(inet_ntoa(broadcast));
}
static int _set_ip(nozzle_t nozzle, const char *command,
const char *ipaddr, const char *prefix,
char **error_string, int secondary)
{
char *broadcast = NULL;
char cmdline[4096];
#ifdef KNET_BSD
char proto[6];
int v4 = 1;
snprintf(proto, sizeof(proto), "inet");
#endif
if (!strchr(ipaddr, ':')) {
broadcast = _get_v4_broadcast(ipaddr, prefix);
if (!broadcast) {
errno = EINVAL;
return -1;
}
}
#ifdef KNET_BSD
else {
v4 = 0;
snprintf(proto, sizeof(proto), "inet6");
}
#endif
memset(cmdline, 0, sizeof(cmdline));
#ifdef KNET_LINUX
if (broadcast) {
snprintf(cmdline, sizeof(cmdline)-1,
"ip addr %s %s/%s dev %s broadcast %s",
command, ipaddr, prefix,
nozzle->name, broadcast);
} else {
snprintf(cmdline, sizeof(cmdline)-1,
"ip addr %s %s/%s dev %s",
command, ipaddr, prefix,
nozzle->name);
}
#endif
#ifdef KNET_BSD
if (!strcmp(command, "add")) {
snprintf(cmdline, sizeof(cmdline)-1,
"ifconfig %s %s %s/%s",
nozzle->name, proto, ipaddr, prefix);
if (broadcast) {
snprintf(cmdline + strlen(cmdline),
sizeof(cmdline) - strlen(cmdline) -1,
" broadcast %s", broadcast);
}
if ((secondary) && (v4)) {
snprintf(cmdline + strlen(cmdline),
sizeof(cmdline) - strlen(cmdline) -1,
" alias");
}
} else {
snprintf(cmdline, sizeof(cmdline)-1,
"ifconfig %s %s %s/%s delete",
nozzle->name, proto, ipaddr, prefix);
}
#endif
if (broadcast) {
free(broadcast);
}
return _execute_bin_sh(cmdline, error_string);
}
static int _find_ip(nozzle_t nozzle,
const char *ipaddr, const char *prefix,
struct nozzle_ip **ip, struct nozzle_ip **ip_prev)
{
struct nozzle_ip *local_ip, *local_ip_prev;
int found = 0;
local_ip = local_ip_prev = nozzle->ip;
while(local_ip) {
if ((!strcmp(local_ip->ipaddr, ipaddr)) && (!strcmp(local_ip->prefix, prefix))) {
found = 1;
break;
}
local_ip_prev = local_ip;
local_ip = local_ip->next;
}
if (found) {
*ip = local_ip;
*ip_prev = local_ip_prev;
}
return found;
}
int nozzle_add_ip(nozzle_t nozzle, const char *ipaddr, const char *prefix, char **error_string)
{
int err = 0, savederrno = 0;
int found = 0;
struct nozzle_ip *ip = NULL, *ip_prev = NULL, *ip_last = NULL;
int secondary = 0;
if ((!nozzle) || (!ipaddr) || (!prefix) || (!error_string)) {
errno = EINVAL;
return -1;
}
savederrno = pthread_mutex_lock(&config_mutex);
if (savederrno) {
errno = savederrno;
return -1;
}
if (!_check(nozzle)) {
errno = EINVAL;
err = -1;
goto out_clean;
}
found = _find_ip(nozzle, ipaddr, prefix, &ip, &ip_prev);
if (found) {
goto out_clean;
}
ip = malloc(sizeof(struct nozzle_ip));
if (!ip) {
savederrno = errno;
err = -1 ;
goto out_clean;
}
memset(ip, 0, sizeof(struct nozzle_ip));
strncpy(ip->ipaddr, ipaddr, IPADDR_CHAR_MAX);
strncpy(ip->prefix, prefix, PREFIX_CHAR_MAX);
if (!strchr(ip->ipaddr, ':')) {
ip->domain = AF_INET;
} else {
ip->domain = AF_INET6;
}
/*
* if user asks for an IPv6 address, but MTU < 1280
* store the IP and bring it up later if and when MTU > 1280
*/
if ((ip->domain == AF_INET6) && (_get_mtu(nozzle) < 1280)) {
err = 0;
} else {
if (nozzle->ip) {
secondary = 1;
}
err = _set_ip(nozzle, "add", ipaddr, prefix, error_string, secondary);
savederrno = errno;
}
if (err) {
free(ip);
goto out_clean;
}
if (nozzle->ip) {
ip_last = nozzle->ip;
while (ip_last->next != NULL) {
ip_last = ip_last->next;
}
ip_last->next = ip;
} else {
nozzle->ip = ip;
}
out_clean:
pthread_mutex_unlock(&config_mutex);
errno = savederrno;
return err;
}
int nozzle_del_ip(nozzle_t nozzle, const char *ipaddr, const char *prefix, char **error_string)
{
int err = 0, savederrno = 0;
int found = 0;
struct nozzle_ip *ip = NULL, *ip_prev = NULL;
if ((!nozzle) || (!ipaddr) || (!prefix) || (!error_string)) {
errno = EINVAL;
return -1;
}
savederrno = pthread_mutex_lock(&config_mutex);
if (savederrno) {
errno = savederrno;
return -1;
}
if (!_check(nozzle)) {
errno = EINVAL;
err = -1;
goto out_clean;
}
found = _find_ip(nozzle, ipaddr, prefix, &ip, &ip_prev);
if (!found) {
goto out_clean;
}
err = _set_ip(nozzle, "del", ipaddr, prefix, error_string, 0);
savederrno = errno;
if (!err) {
if (ip == ip_prev) {
nozzle->ip = ip->next;
} else {
ip_prev->next = ip->next;
}
free(ip);
}
out_clean:
pthread_mutex_unlock(&config_mutex);
errno = savederrno;
return err;
}
-int nozzle_get_fd(const nozzle_t nozzle)
-{
- int fd = -1, savederrno = 0;
-
- if (!nozzle) {
- errno = EINVAL;
- return -1;
- }
-
- savederrno = pthread_mutex_lock(&config_mutex);
- if (savederrno) {
- errno = savederrno;
- return -1;
- }
-
- if (!_check(nozzle)) {
- savederrno = ENOENT;
- fd = -1;
- goto out_clean;
- }
-
- fd = nozzle->fd;
-
-out_clean:
- pthread_mutex_unlock(&config_mutex);
- errno = savederrno;
- return fd;
-}
-
-const char *nozzle_get_name_by_handle(const nozzle_t nozzle)
-{
- int savederrno = 0;
- char *name = NULL;
-
- if (!nozzle) {
- errno = EINVAL;
- return NULL;
- }
-
- savederrno = pthread_mutex_lock(&config_mutex);
- if (savederrno) {
- errno = savederrno;
- return NULL;
- }
-
- if (!_check(nozzle)) {
- errno = ENOENT;
- goto out_clean;
- }
-
- name = nozzle->name;
-
-out_clean:
- pthread_mutex_unlock(&config_mutex);
- errno = savederrno;
- return name;
-}
-
int nozzle_get_ips(const nozzle_t nozzle, char **ipaddr_list, int *entries)
{
int err = 0, savederrno = 0;
int found = 0;
char *ip_list = NULL;
int size = 0, offset = 0, len;
struct nozzle_ip *ip = NULL;
if ((!nozzle) || (!ipaddr_list) || (!entries)) {
errno = EINVAL;
return -1;
}
savederrno = pthread_mutex_lock(&config_mutex);
if (savederrno) {
errno = savederrno;
return -1;
}
if (!_check(nozzle)) {
errno = EINVAL;
goto out_clean;
}
ip = nozzle->ip;
while (ip) {
found++;
ip = ip->next;
}
if (!found) {
*ipaddr_list = NULL;
*entries = 0;
goto out_clean;
}
size = found * (IPADDR_CHAR_MAX + PREFIX_CHAR_MAX + 2);
ip_list = malloc(size);
if (!ip_list) {
savederrno = errno;
err = -1;
goto out_clean;
}
memset(ip_list, 0, size);
ip = nozzle->ip;
while (ip) {
len = strlen(ip->ipaddr);
memmove(ip_list + offset, ip->ipaddr, len);
offset = offset + len + 1;
len = strlen(ip->prefix);
memmove(ip_list + offset, ip->prefix, len);
offset = offset + len + 1;
ip = ip->next;
}
*ipaddr_list = ip_list;
*entries = found;
out_clean:
pthread_mutex_unlock(&config_mutex);
errno = savederrno;
return err;
}
#endif
diff --git a/libnozzle/libnozzle.c b/libnozzle/libnozzle.c
index 207d445e..736abda4 100644
--- a/libnozzle/libnozzle.c
+++ b/libnozzle/libnozzle.c
@@ -1,1138 +1,1142 @@
/*
* Copyright (C) 2010-2018 Red Hat, Inc. All rights reserved.
*
* Author: Fabio M. Di Nitto <fabbione@kronosnet.org>
*
* This software licensed under GPL-2.0+, LGPL-2.0+
*/
#include "config.h"
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <net/ethernet.h>
#include <arpa/inet.h>
#include <pthread.h>
#include <limits.h>
#include <stdio.h>
#include <net/if.h>
#include <ifaddrs.h>
#include <stdint.h>
#ifdef KNET_LINUX
#include <linux/if_tun.h>
#include <netinet/ether.h>
#endif
#ifdef KNET_BSD
#include <net/if_dl.h>
#endif
#include "libnozzle.h"
#include "internals.h"
/*
* internal functions are all _unlocked_
* locking should be handled at external API functions
*/
static int lib_init = 0;
static struct nozzle_lib_config lib_cfg;
static pthread_mutex_t config_mutex = PTHREAD_MUTEX_INITIALIZER;
/* forward declarations */
static void _close(nozzle_t nozzle);
static void _close_cfg(void);
static int _get_mtu(const nozzle_t nozzle);
static int _get_mac(const nozzle_t nozzle, char **ether_addr);
static int _set_down(nozzle_t nozzle, char **error_down, char **error_postdown);
static char *_get_v4_broadcast(const char *ipaddr, const char *prefix);
static int _set_ip(nozzle_t nozzle, const char *command,
const char *ipaddr, const char *prefix,
char **error_string, int secondary);
static int _find_ip(nozzle_t nozzle,
const char *ipaddr, const char *prefix,
struct nozzle_ip **ip, struct nozzle_ip **ip_prev);
static int is_valid_nozzle(const nozzle_t nozzle)
{
nozzle_t temp;
if (!nozzle) {
return 0;
}
if (!lib_init) {
return 0;
}
temp = lib_cfg.head;
while (temp != NULL) {
if (nozzle == temp)
return 1;
temp = temp->next;
}
return 0;
}
static void _close(nozzle_t nozzle)
{
#ifdef KNET_BSD
struct ifreq ifr;
#endif
if (!nozzle)
return;
if (nozzle->fd)
close(nozzle->fd);
#ifdef KNET_BSD
memset(&ifr, 0, sizeof(struct ifreq));
strncpy(ifname, nozzle->name, IFNAMSIZ);
ioctl(lib_cfg.ioctlfd, SIOCIFDESTROY, &ifr);
#endif
free(nozzle);
return;
}
static void _close_cfg(void)
{
if (lib_cfg.head == NULL) {
close(lib_cfg.ioctlfd);
lib_init = 0;
}
}
static int _get_mtu(const nozzle_t nozzle)
{
int err = 0, savederrno = 0;
struct ifreq ifr;
memset(&ifr, 0, sizeof(struct ifreq));
strncpy(ifname, nozzle->name, IFNAMSIZ);
err = ioctl(lib_cfg.ioctlfd, SIOCGIFMTU, &ifr);
if (err) {
savederrno = errno;
goto out_clean;
}
err = ifr.ifr_mtu;
out_clean:
errno = savederrno;
return err;
}
static int _get_mac(const nozzle_t nozzle, char **ether_addr)
{
int err = 0, savederrno = 0;
struct ifreq ifr;
char mac[MACADDR_CHAR_MAX];
#ifdef KNET_BSD
struct ifaddrs *ifap = NULL;
struct ifaddrs *ifa;
int found = 0;
#endif
memset(&mac, 0, MACADDR_CHAR_MAX);
memset(&ifr, 0, sizeof(struct ifreq));
strncpy(ifname, nozzle->name, IFNAMSIZ);
#ifdef KNET_LINUX
err = ioctl(lib_cfg.ioctlfd, SIOCGIFHWADDR, &ifr);
if (err) {
savederrno = errno;
goto out_clean;
}
ether_ntoa_r((struct ether_addr *)ifr.ifr_hwaddr.sa_data, mac);
#endif
#ifdef KNET_BSD
/*
* there is no ioctl to get the ether address of an interface on FreeBSD
* (not to be confused with hwaddr). Use workaround described here:
* https://lists.freebsd.org/pipermail/freebsd-hackers/2004-June/007394.html
*/
err = getifaddrs(&ifap);
if (err < 0) {
savederrno = errno;
goto out_clean;
}
ifa = ifap;
while (ifa) {
if (!strncmp(nozzle->name, ifa->ifa_name, IFNAMSIZ)) {
found = 1;
break;
}
ifa=ifa->ifa_next;
}
if (found) {
ether_ntoa_r((struct ether_addr *)LLADDR((struct sockaddr_dl *)ifa->ifa_addr), mac);
} else {
errno = EINVAL;
err = -1;
}
freeifaddrs(ifap);
if (err) {
goto out_clean;
}
#endif
*ether_addr = strdup(mac);
if (!*ether_addr) {
savederrno = errno;
err = -1;
}
out_clean:
errno = savederrno;
return err;
}
-nozzle_t nozzle_get_handle_by_name(char *devname)
-{
- int savederrno = 0;
- nozzle_t nozzle;
-
- if ((devname == NULL) || (strlen(devname) > IFNAMSIZ)) {
- errno = EINVAL;
- return NULL;
- }
-
- savederrno = pthread_mutex_lock(&config_mutex);
- if (savederrno) {
- errno = savederrno;
- return NULL;
- }
-
- nozzle = lib_cfg.head;
- while (nozzle != NULL) {
- if (!strcmp(devname, nozzle->name))
- break;
- nozzle = nozzle->next;
- }
-
- if (!nozzle) {
- savederrno = ENOENT;
- }
-
- pthread_mutex_unlock(&config_mutex);
- errno = savederrno;
- return nozzle;
-}
-
nozzle_t nozzle_open(char *devname, size_t devname_size, const char *updownpath)
{
int savederrno = 0;
nozzle_t nozzle = NULL;
char *temp_mac = NULL;
#ifdef KNET_LINUX
struct ifreq ifr;
#endif
#ifdef KNET_BSD
uint16_t i;
long int nozzlenum = 0;
char curnozzle[IFNAMSIZ];
#endif
if (devname == NULL) {
errno = EINVAL;
return NULL;
}
if (devname_size < IFNAMSIZ) {
errno = EINVAL;
return NULL;
}
if (strlen(devname) > IFNAMSIZ) {
errno = E2BIG;
return NULL;
}
#ifdef KNET_BSD
/*
* BSD does not support named devices like Linux
* but it is possible to force a nozzleX device number
* where X is 0 to 255.
*/
if (strlen(devname)) {
if (strncmp(devname, "tap", 3)) {
errno = EINVAL;
return NULL;
}
errno = 0;
nozzlenum = strtol(devname+3, NULL, 10);
if (errno) {
errno = EINVAL;
return NULL;
}
if ((nozzlenum < 0) || (nozzlenum > 255)) {
errno = EINVAL;
return NULL;
}
}
#endif
if (updownpath) {
/* only absolute paths */
if (updownpath[0] != '/') {
errno = EINVAL;
return NULL;
}
if (strlen(updownpath) >= UPDOWN_PATH_MAX) {
errno = E2BIG;
return NULL;
}
}
savederrno = pthread_mutex_lock(&config_mutex);
if (savederrno) {
errno = savederrno;
return NULL;
}
if (!lib_init) {
lib_cfg.head = NULL;
#ifdef KNET_LINUX
lib_cfg.ioctlfd = socket(AF_INET, SOCK_STREAM, 0);
#endif
#ifdef KNET_BSD
lib_cfg.ioctlfd = socket(AF_LOCAL, SOCK_DGRAM, 0);
#endif
if (lib_cfg.ioctlfd < 0) {
savederrno = errno;
goto out_error;
}
lib_init = 1;
}
nozzle = malloc(sizeof(struct nozzle_iface));
if (!nozzle) {
savederrno = ENOMEM;
goto out_error;
}
memset(nozzle, 0, sizeof(struct nozzle_iface));
#ifdef KNET_BSD
if (!strlen(devname)) {
for (i = 0; i < 256; i++) {
snprintf(curnozzle, sizeof(curnozzle) - 1, "/dev/tap%u", i);
nozzle->fd = open(curnozzle, O_RDWR);
savederrno = errno;
if (nozzle->fd > 0) {
break;
}
}
snprintf(curnozzle, sizeof(curnozzle) -1 , "tap%u", i);
} else {
snprintf(curnozzle, sizeof(curnozzle) - 1, "/dev/%s", devname);
nozzle->fd = open(curnozzle, O_RDWR);
savederrno = errno;
snprintf(curnozzle, sizeof(curnozzle) - 1, "%s", devname);
}
if (nozzle->fd < 0) {
errno = EBUSY;
goto out_error;
}
strncpy(devname, curnozzle, IFNAMSIZ);
strncpy(nozzle->name, curnozzle, IFNAMSIZ);
#endif
#ifdef KNET_LINUX
if ((nozzle->fd = open("/dev/net/tun", O_RDWR)) < 0) {
savederrno = errno;
goto out_error;
}
memset(&ifr, 0, sizeof(struct ifreq));
strncpy(ifname, devname, IFNAMSIZ);
ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
if (ioctl(nozzle->fd, TUNSETIFF, &ifr) < 0) {
savederrno = errno;
goto out_error;
}
if ((strlen(devname) > 0) && (strcmp(devname, ifname) != 0)) {
errno = EBUSY;
goto out_error;
}
strncpy(devname, ifname, IFNAMSIZ);
strncpy(nozzle->name, ifname, IFNAMSIZ);
#endif
nozzle->default_mtu = _get_mtu(nozzle);
if (nozzle->default_mtu < 0) {
savederrno = errno;
goto out_error;
}
if (_get_mac(nozzle, &temp_mac) < 0) {
savederrno = errno;
goto out_error;
}
strncpy(nozzle->default_mac, temp_mac, 18);
free(temp_mac);
if (updownpath) {
int len = strlen(updownpath);
strcpy(nozzle->updownpath, updownpath);
if (nozzle->updownpath[len-1] != '/') {
nozzle->updownpath[len] = '/';
}
nozzle->hasupdown = 1;
}
nozzle->next = lib_cfg.head;
lib_cfg.head = nozzle;
pthread_mutex_unlock(&config_mutex);
errno = savederrno;
return nozzle;
out_error:
_close(nozzle);
_close_cfg();
pthread_mutex_unlock(&config_mutex);
errno = savederrno;
return NULL;
}
int nozzle_close(nozzle_t nozzle, char **error_down, char **error_postdown)
{
int err = 0, savederrno = 0;
nozzle_t temp = lib_cfg.head;
nozzle_t prev = lib_cfg.head;
struct nozzle_ip *ip, *ip_next;
char *error_string = NULL;
savederrno = pthread_mutex_lock(&config_mutex);
if (savederrno) {
errno = savederrno;
return -1;
}
if (!is_valid_nozzle(nozzle)) {
savederrno = EINVAL;
err = -1;
goto out_clean;
}
while ((temp) && (temp != nozzle)) {
prev = temp;
temp = temp->next;
}
if (nozzle == prev) {
lib_cfg.head = nozzle->next;
} else {
prev->next = nozzle->next;
}
_set_down(nozzle, error_down, error_postdown);
ip = nozzle->ip;
while (ip) {
ip_next = ip->next;
_set_ip(nozzle, "del", ip->ipaddr, ip->prefix, &error_string, 0);
if (error_string) {
free(error_string);
error_string = NULL;
}
free(ip);
ip = ip_next;
}
_close(nozzle);
_close_cfg();
out_clean:
pthread_mutex_unlock(&config_mutex);
errno = savederrno;
return err;
}
int nozzle_get_mtu(const nozzle_t nozzle)
{
int err = 0, savederrno = 0;
savederrno = pthread_mutex_lock(&config_mutex);
if (savederrno) {
errno = savederrno;
return -1;
}
if (!is_valid_nozzle(nozzle)) {
savederrno = EINVAL;
err = -1;
goto out_clean;
}
err = _get_mtu(nozzle);
savederrno = errno;
out_clean:
pthread_mutex_unlock(&config_mutex);
savederrno = errno;
return err;
}
int nozzle_set_mtu(nozzle_t nozzle, const int mtu, char **error_string)
{
int err = 0, savederrno = 0;
struct nozzle_ip *tmp_ip;
struct ifreq ifr;
if ((!mtu) || (!error_string)) {
errno = EINVAL;
return -1;
}
savederrno = pthread_mutex_lock(&config_mutex);
if (savederrno) {
errno = savederrno;
return -1;
}
if (!is_valid_nozzle(nozzle)) {
savederrno = EINVAL;
err = -1;
goto out_clean;
}
err = nozzle->current_mtu = _get_mtu(nozzle);
if (err < 0) {
savederrno = errno;
goto out_clean;
}
memset(&ifr, 0, sizeof(struct ifreq));
strncpy(ifname, nozzle->name, IFNAMSIZ);
ifr.ifr_mtu = mtu;
err = ioctl(lib_cfg.ioctlfd, SIOCSIFMTU, &ifr);
if (err) {
savederrno = errno;
goto out_clean;
}
if ((nozzle->current_mtu < 1280) && (mtu >= 1280)) {
tmp_ip = nozzle->ip;
while(tmp_ip) {
if (tmp_ip->domain == AF_INET6) {
err = _set_ip(nozzle, "add", tmp_ip->ipaddr, tmp_ip->prefix, error_string, 0);
if (err) {
savederrno = errno;
err = -1;
goto out_clean;
}
}
tmp_ip = tmp_ip->next;
}
}
out_clean:
pthread_mutex_unlock(&config_mutex);
errno = savederrno;
return err;
}
int nozzle_reset_mtu(nozzle_t nozzle, char **error_string)
{
return nozzle_set_mtu(nozzle, nozzle->default_mtu, error_string);
}
int nozzle_get_mac(const nozzle_t nozzle, char **ether_addr)
{
int err = 0, savederrno = 0;
if (!ether_addr) {
errno = EINVAL;
return -1;
}
savederrno = pthread_mutex_lock(&config_mutex);
if (savederrno) {
errno = savederrno;
return -1;
}
if (!is_valid_nozzle(nozzle)) {
savederrno = EINVAL;
err = -1;
goto out_clean;
}
err = _get_mac(nozzle, ether_addr);
out_clean:
pthread_mutex_unlock(&config_mutex);
errno = savederrno;
return err;
}
int nozzle_set_mac(nozzle_t nozzle, const char *ether_addr)
{
int err = 0, savederrno = 0;
struct ifreq ifr;
if (!ether_addr) {
errno = EINVAL;
return -1;
}
savederrno = pthread_mutex_lock(&config_mutex);
if (savederrno) {
errno = savederrno;
return -1;
}
if (!is_valid_nozzle(nozzle)) {
savederrno = EINVAL;
err = -1;
goto out_clean;
}
memset(&ifr, 0, sizeof(struct ifreq));
strncpy(ifname, nozzle->name, IFNAMSIZ);
#ifdef KNET_LINUX
err = ioctl(lib_cfg.ioctlfd, SIOCGIFHWADDR, &ifr);
if (err) {
savederrno = errno;
goto out_clean;
}
memmove(ifr.ifr_hwaddr.sa_data, ether_aton(ether_addr), ETH_ALEN);
err = ioctl(lib_cfg.ioctlfd, SIOCSIFHWADDR, &ifr);
savederrno = errno;
#endif
#ifdef KNET_BSD
err = ioctl(lib_cfg.ioctlfd, SIOCGIFADDR, &ifr);
if (err) {
savederrno = errno;
goto out_clean;
}
memmove(ifr.ifr_addr.sa_data, ether_aton(ether_addr), ETHER_ADDR_LEN);
ifr.ifr_addr.sa_len = ETHER_ADDR_LEN;
err = ioctl(lib_cfg.ioctlfd, SIOCSIFLLADDR, &ifr);
savederrno = errno;
#endif
out_clean:
pthread_mutex_unlock(&config_mutex);
errno = savederrno;
return err;
}
int nozzle_reset_mac(nozzle_t nozzle)
{
return nozzle_set_mac(nozzle, nozzle->default_mac);
}
int nozzle_set_up(nozzle_t nozzle, char **error_preup, char **error_up)
{
int err = 0, savederrno = 0;
struct ifreq ifr;
savederrno = pthread_mutex_lock(&config_mutex);
if (savederrno) {
errno = savederrno;
return -1;
}
if (!is_valid_nozzle(nozzle)) {
savederrno = EINVAL;
err = -1;
goto out_clean;
}
if ((nozzle->hasupdown) && ((!error_preup) || (!error_up))) {
savederrno = EINVAL;
err = -1;
goto out_clean;
}
if (nozzle->up) {
goto out_clean;
}
memset(&ifr, 0, sizeof(struct ifreq));
strncpy(ifname, nozzle->name, IFNAMSIZ);
err = ioctl(lib_cfg.ioctlfd, SIOCGIFFLAGS, &ifr);
if (err) {
savederrno = errno;
goto out_clean;
}
run_updown(nozzle, "pre-up.d", error_preup);
ifr.ifr_flags |= IFF_UP | IFF_RUNNING;
err = ioctl(lib_cfg.ioctlfd, SIOCSIFFLAGS, &ifr);
if (err) {
savederrno = errno;
goto out_clean;
}
run_updown(nozzle, "up.d", error_up);
nozzle->up = 1;
out_clean:
pthread_mutex_unlock(&config_mutex);
errno = savederrno;
return err;
}
static int _set_down(nozzle_t nozzle, char **error_down, char **error_postdown)
{
int err = 0, savederrno = 0;
struct ifreq ifr;
if (!nozzle->up) {
goto out_clean;
}
memset(&ifr, 0, sizeof(struct ifreq));
strncpy(ifname, nozzle->name, IFNAMSIZ);
err = ioctl(lib_cfg.ioctlfd, SIOCGIFFLAGS, &ifr);
if (err) {
savederrno = errno;
goto out_clean;
}
run_updown(nozzle, "down.d", error_down);
ifr.ifr_flags &= ~IFF_UP;
err = ioctl(lib_cfg.ioctlfd, SIOCSIFFLAGS, &ifr);
if (err) {
savederrno = errno;
goto out_clean;
}
run_updown(nozzle, "post-down.d", error_postdown);
nozzle->up = 0;
out_clean:
errno = savederrno;
return err;
}
int nozzle_set_down(nozzle_t nozzle, char **error_down, char **error_postdown)
{
int err = 0, savederrno = 0;
savederrno = pthread_mutex_lock(&config_mutex);
if (savederrno) {
errno = savederrno;
return -1;
}
if (!is_valid_nozzle(nozzle)) {
savederrno = EINVAL;
err = -1;
goto out_clean;
}
if ((nozzle->hasupdown) && ((!error_down) || (!error_postdown))) {
savederrno = EINVAL;
err = -1;
goto out_clean;
}
err = _set_down(nozzle, error_down, error_postdown);
savederrno = errno;
out_clean:
pthread_mutex_unlock(&config_mutex);
errno = savederrno;
return err;
}
static char *_get_v4_broadcast(const char *ipaddr, const char *prefix)
{
int prefix_len;
struct in_addr mask;
struct in_addr broadcast;
struct in_addr address;
prefix_len = atoi(prefix);
if ((prefix_len > 32) || (prefix_len < 0))
return NULL;
if (inet_pton(AF_INET, ipaddr, &address) <= 0)
return NULL;
mask.s_addr = htonl(~((1 << (32 - prefix_len)) - 1));
memset(&broadcast, 0, sizeof(broadcast));
broadcast.s_addr = (address.s_addr & mask.s_addr) | ~mask.s_addr;
return strdup(inet_ntoa(broadcast));
}
static int _set_ip(nozzle_t nozzle, const char *command,
const char *ipaddr, const char *prefix,
char **error_string, int secondary)
{
char *broadcast = NULL;
char cmdline[4096];
#ifdef KNET_BSD
char proto[6];
int v4 = 1;
snprintf(proto, sizeof(proto), "inet");
#endif
if (!strchr(ipaddr, ':')) {
broadcast = _get_v4_broadcast(ipaddr, prefix);
if (!broadcast) {
errno = EINVAL;
return -1;
}
}
#ifdef KNET_BSD
else {
v4 = 0;
snprintf(proto, sizeof(proto), "inet6");
}
#endif
memset(cmdline, 0, sizeof(cmdline));
#ifdef KNET_LINUX
if (broadcast) {
snprintf(cmdline, sizeof(cmdline)-1,
"ip addr %s %s/%s dev %s broadcast %s",
command, ipaddr, prefix,
nozzle->name, broadcast);
} else {
snprintf(cmdline, sizeof(cmdline)-1,
"ip addr %s %s/%s dev %s",
command, ipaddr, prefix,
nozzle->name);
}
#endif
#ifdef KNET_BSD
if (!strcmp(command, "add")) {
snprintf(cmdline, sizeof(cmdline)-1,
"ifconfig %s %s %s/%s",
nozzle->name, proto, ipaddr, prefix);
if (broadcast) {
snprintf(cmdline + strlen(cmdline),
sizeof(cmdline) - strlen(cmdline) -1,
" broadcast %s", broadcast);
}
if ((secondary) && (v4)) {
snprintf(cmdline + strlen(cmdline),
sizeof(cmdline) - strlen(cmdline) -1,
" alias");
}
} else {
snprintf(cmdline, sizeof(cmdline)-1,
"ifconfig %s %s %s/%s delete",
nozzle->name, proto, ipaddr, prefix);
}
#endif
if (broadcast) {
free(broadcast);
}
return execute_bin_sh_command(cmdline, error_string);
}
static int _find_ip(nozzle_t nozzle,
const char *ipaddr, const char *prefix,
struct nozzle_ip **ip, struct nozzle_ip **ip_prev)
{
struct nozzle_ip *local_ip, *local_ip_prev;
int found = 0;
local_ip = local_ip_prev = nozzle->ip;
while(local_ip) {
if ((!strcmp(local_ip->ipaddr, ipaddr)) && (!strcmp(local_ip->prefix, prefix))) {
found = 1;
break;
}
local_ip_prev = local_ip;
local_ip = local_ip->next;
}
if (found) {
*ip = local_ip;
*ip_prev = local_ip_prev;
}
return found;
}
int nozzle_add_ip(nozzle_t nozzle, const char *ipaddr, const char *prefix, char **error_string)
{
int err = 0, savederrno = 0;
int found = 0;
struct nozzle_ip *ip = NULL, *ip_prev = NULL, *ip_last = NULL;
int secondary = 0;
if ((!ipaddr) || (!prefix) || (!error_string)) {
errno = EINVAL;
return -1;
}
savederrno = pthread_mutex_lock(&config_mutex);
if (savederrno) {
errno = savederrno;
return -1;
}
if (!is_valid_nozzle(nozzle)) {
savederrno = EINVAL;
err = -1;
goto out_clean;
}
found = _find_ip(nozzle, ipaddr, prefix, &ip, &ip_prev);
if (found) {
goto out_clean;
}
ip = malloc(sizeof(struct nozzle_ip));
if (!ip) {
savederrno = errno;
err = -1 ;
goto out_clean;
}
memset(ip, 0, sizeof(struct nozzle_ip));
strncpy(ip->ipaddr, ipaddr, IPADDR_CHAR_MAX);
strncpy(ip->prefix, prefix, PREFIX_CHAR_MAX);
if (!strchr(ip->ipaddr, ':')) {
ip->domain = AF_INET;
} else {
ip->domain = AF_INET6;
}
/*
* if user asks for an IPv6 address, but MTU < 1280
* store the IP and bring it up later if and when MTU > 1280
*/
if ((ip->domain == AF_INET6) && (_get_mtu(nozzle) < 1280)) {
err = 0;
} else {
if (nozzle->ip) {
secondary = 1;
}
err = _set_ip(nozzle, "add", ipaddr, prefix, error_string, secondary);
savederrno = errno;
}
if (err) {
free(ip);
goto out_clean;
}
if (nozzle->ip) {
ip_last = nozzle->ip;
while (ip_last->next != NULL) {
ip_last = ip_last->next;
}
ip_last->next = ip;
} else {
nozzle->ip = ip;
}
out_clean:
pthread_mutex_unlock(&config_mutex);
errno = savederrno;
return err;
}
int nozzle_del_ip(nozzle_t nozzle, const char *ipaddr, const char *prefix, char **error_string)
{
int err = 0, savederrno = 0;
int found = 0;
struct nozzle_ip *ip = NULL, *ip_prev = NULL;
if ((!ipaddr) || (!prefix) || (!error_string)) {
errno = EINVAL;
return -1;
}
savederrno = pthread_mutex_lock(&config_mutex);
if (savederrno) {
errno = savederrno;
return -1;
}
if (!is_valid_nozzle(nozzle)) {
savederrno = EINVAL;
err = -1;
goto out_clean;
}
found = _find_ip(nozzle, ipaddr, prefix, &ip, &ip_prev);
if (!found) {
goto out_clean;
}
err = _set_ip(nozzle, "del", ipaddr, prefix, error_string, 0);
savederrno = errno;
if (!err) {
if (ip == ip_prev) {
nozzle->ip = ip->next;
} else {
ip_prev->next = ip->next;
}
free(ip);
}
out_clean:
pthread_mutex_unlock(&config_mutex);
errno = savederrno;
return err;
}
-int nozzle_get_fd(const nozzle_t nozzle)
-{
- int fd = -1, savederrno = 0;
-
- savederrno = pthread_mutex_lock(&config_mutex);
- if (savederrno) {
- errno = savederrno;
- return -1;
- }
-
- if (!is_valid_nozzle(nozzle)) {
- savederrno = ENOENT;
- fd = -1;
- goto out_clean;
- }
-
- fd = nozzle->fd;
-
-out_clean:
- pthread_mutex_unlock(&config_mutex);
- errno = savederrno;
- return fd;
-}
-
-const char *nozzle_get_name_by_handle(const nozzle_t nozzle)
-{
- int savederrno = 0;
- char *name = NULL;
-
- savederrno = pthread_mutex_lock(&config_mutex);
- if (savederrno) {
- errno = savederrno;
- return NULL;
- }
-
- if (!is_valid_nozzle(nozzle)) {
- savederrno = ENOENT;
- goto out_clean;
- }
-
- name = nozzle->name;
-
-out_clean:
- pthread_mutex_unlock(&config_mutex);
- errno = savederrno;
- return name;
-}
-
int nozzle_get_ips(const nozzle_t nozzle, char **ipaddr_list, int *entries)
{
int err = 0, savederrno = 0;
int found = 0;
char *ip_list = NULL;
int size = 0, offset = 0, len;
struct nozzle_ip *ip = NULL;
if ((!ipaddr_list) || (!entries)) {
errno = EINVAL;
return -1;
}
savederrno = pthread_mutex_lock(&config_mutex);
if (savederrno) {
errno = savederrno;
return -1;
}
if (!is_valid_nozzle(nozzle)) {
savederrno = EINVAL;
goto out_clean;
}
ip = nozzle->ip;
while (ip) {
found++;
ip = ip->next;
}
if (!found) {
*ipaddr_list = NULL;
*entries = 0;
goto out_clean;
}
size = found * (IPADDR_CHAR_MAX + PREFIX_CHAR_MAX + 2);
ip_list = malloc(size);
if (!ip_list) {
savederrno = errno;
err = -1;
goto out_clean;
}
memset(ip_list, 0, size);
ip = nozzle->ip;
while (ip) {
len = strlen(ip->ipaddr);
memmove(ip_list + offset, ip->ipaddr, len);
offset = offset + len + 1;
len = strlen(ip->prefix);
memmove(ip_list + offset, ip->prefix, len);
offset = offset + len + 1;
ip = ip->next;
}
*ipaddr_list = ip_list;
*entries = found;
out_clean:
pthread_mutex_unlock(&config_mutex);
errno = savederrno;
return err;
}
+
+/*
+ * functions below should be completed
+ */
+
+nozzle_t nozzle_get_handle_by_name(const char *devname)
+{
+ int savederrno = 0;
+ nozzle_t nozzle;
+
+ if ((devname == NULL) || (strlen(devname) > IFNAMSIZ)) {
+ errno = EINVAL;
+ return NULL;
+ }
+
+ savederrno = pthread_mutex_lock(&config_mutex);
+ if (savederrno) {
+ errno = savederrno;
+ return NULL;
+ }
+
+ nozzle = lib_cfg.head;
+ while (nozzle != NULL) {
+ if (!strcmp(devname, nozzle->name))
+ break;
+ nozzle = nozzle->next;
+ }
+
+ if (!nozzle) {
+ savederrno = ENOENT;
+ }
+
+ pthread_mutex_unlock(&config_mutex);
+ errno = savederrno;
+ return nozzle;
+}
+
+const char *nozzle_get_name_by_handle(const nozzle_t nozzle)
+{
+ int savederrno = 0;
+ char *name = NULL;
+
+ savederrno = pthread_mutex_lock(&config_mutex);
+ if (savederrno) {
+ errno = savederrno;
+ return NULL;
+ }
+
+ if (!is_valid_nozzle(nozzle)) {
+ savederrno = ENOENT;
+ goto out_clean;
+ }
+
+ name = nozzle->name;
+
+out_clean:
+ pthread_mutex_unlock(&config_mutex);
+ errno = savederrno;
+ return name;
+}
+
+int nozzle_get_fd(const nozzle_t nozzle)
+{
+ int fd = -1, savederrno = 0;
+
+ savederrno = pthread_mutex_lock(&config_mutex);
+ if (savederrno) {
+ errno = savederrno;
+ return -1;
+ }
+
+ if (!is_valid_nozzle(nozzle)) {
+ savederrno = ENOENT;
+ fd = -1;
+ goto out_clean;
+ }
+
+ fd = nozzle->fd;
+
+out_clean:
+ pthread_mutex_unlock(&config_mutex);
+ errno = savederrno;
+ return fd;
+}
diff --git a/libnozzle/libnozzle.h b/libnozzle/libnozzle.h
index 355f07eb..dbbadf51 100644
--- a/libnozzle/libnozzle.h
+++ b/libnozzle/libnozzle.h
@@ -1,332 +1,332 @@
/*
* Copyright (C) 2010-2018 Red Hat, Inc. All rights reserved.
*
* Author: Fabio M. Di Nitto <fabbione@kronosnet.org>
*
* This software licensed under GPL-2.0+, LGPL-2.0+
*/
#ifndef __LIBNOZZLE_H__
#define __LIBNOZZLE_H__
#include <sys/types.h>
#include <net/if.h>
/**
*
* @file libnozzle.h
* @brief tap interfaces management API include file
* @copyright Copyright (C) 2010-2017 Red Hat, Inc. All rights reserved.
*
* nozzle is a commodity library to manage tap (ethernet) interfaces
*/
typedef struct nozzle_iface *nozzle_t;
/**
* nozzle_open
* @brief create a new tap device on the system.
*
* devname - pointer to device name of at least size IFNAMSIZ.
* if the dev strlen is 0, then the system will assign a name automatically.
* if a string is specified, the system will try to create a device with
* the specified name.
* NOTE: on FreeBSD the tap device names can only be tapX where X is a
* number from 0 to 255. On Linux such limitation does not apply.
* The name must be unique to the system. If an interface with the same
* name is already configured on the system, an error will be returned.
*
* devname_size - length of the buffer provided in dev (has to be at least IFNAMSIZ).
*
* updownpath - nozzle supports the typical filesystem structure to execute
* actions for: down.d post-down.d pre-up.d up.d
* in the form of:
* updownpath/<action>/<interface_name>
* updownpath specifies where to find those directories on the
* filesystem and it must be an absolute path.
*
* @return
* nozzle_open returns
* a pointer to a nozzle struct on success
* NULL on error and errno is set.
*/
nozzle_t nozzle_open(char *devname, size_t devname_size, const char *updownpath);
/**
* nozzle_close
* @brief deconfigure and destroy a nozzle device
*
* nozzle - pointer to the nozzle struct to destroy
*
* error_down - pointers to string to record errors from executing down.d
* when configured. The string is malloc'ed, the caller needs to free those
* buffers.
*
* error_postdown - pointers to string to record errors from executing post-down.d
* when configured. The string is malloc'ed, the caller needs to free
* those buffers.
*
* @return
* 0 on success
* -1 on error and errno is set.
* error_down / error_postdown are set to NULL if execution of external scripts
* is sucessful
* error_down / error_postdown will contain strings recording the execution error.
*/
int nozzle_close(nozzle_t nozzle, char **error_down, char **error_postdown);
/**
* nozzle_set_up
* @brief equivalent of ifconfig up, executes pre-up.d up.d if configured
*
* nozzle - pointer to the nozzle struct
*
* error_preup - pointer to string pointer to record errors from executing pre-up.d
* when configured. The string is malloc'ed, the caller needs to free that
* buffer.
*
* error_up - pointer to string pointer to record errors from executing up.d
* when configured. The string is malloc'ed, the caller needs to free that
* buffer.
*
* @return
* 0 on success
* -1 on error and errno is set.
* error_preup / error_up are set to NULL if execution of external scripts
* is sucessful
* error_preup / error_up will contain strings recording the execution error.
*/
int nozzle_set_up(nozzle_t nozzle, char **error_preup, char **error_up);
/**
* nozzle_set_down
* @brief equivalent of ifconfig down, executes down.d post-down.d
*
* nozzle - pointer to the nozzle struct
*
* error_down - pointer to a string pointer to record errors from executing down.d
* when configured. The string is malloc'ed, the caller needs to free that
* buffer.
*
* error_postdown - pointer to a string pointer to record errors from executing post-down.d
* when configured. The string is malloc'ed, the caller needs to free
* that buffer.
*
* @return
* 0 on success
* -1 on error and errno is set.
* error_down / error_postdown are set to NULL if execution of external scripts
* is sucessful
* error_down / error_postdown will contain strings recording the execution error.
*/
int nozzle_set_down(nozzle_t nozzle, char **error_down, char **error_postdown);
/**
* nozzle_add_ip
* @brief equivalent of ip addr or ifconfig <ipaddress/prefix>
*
* nozzle - pointer to the nozzle struct
*
* ipaddr - string containing either an IPv4 or an IPv6 address.
* Please note that Linux will automatically remove any IPv6 addresses from an interface
* with MTU < 1280. libnozzle will cache those IPs and re-instate them when MTU is > 1280.
* MTU must be set via nozzle_set_mtu for IPv6 to be re-instated.
*
* prefix - 24, 64 or any valid network prefix for the requested address.
*
* error_string - pointers to string to record errors from ipaddr2 (Linux) or ifconfig (BSD).
* The string is malloc'ed, the caller needs to free this buffer.
*
* @return
* 0 on success
* -1 on error and errno is set.
* error_string is set to NULL on success
* error_string will contain a string recording the execution error.
*/
int nozzle_add_ip(nozzle_t nozzle, const char *ipaddr, const char *prefix, char **error_string);
/**
* nozzle_del_ip
* @brief equivalent of ip addr del or ifconfig del <ipaddress/prefix>
*
* nozzle - pointer to the nozzle struct
*
* ipaddr - string containing either an IPv4 or an IPv6 address.
*
* prefix - 24, 64 or any valid network prefix for the requested address.
*
* error_string - pointers to string to record errors from ipaddr2 (Linux) or ifconfig (BSD).
* The string is malloc'ed, the caller needs to free this buffer.
*
* @return
* 0 on success
* -1 on error and errno is set.
* error_string is set to NULL on success
* error_string will contain a string recording the execution error.
*/
int nozzle_del_ip(nozzle_t nozzle, const char *ipaddr, const char *prefix, char **error_string);
/**
* nozzle_get_ips
* @brief retrive the list of all configured ips for a given interface
*
* TODO: change to use a ipaddr_list struct!
*
* nozzle - pointer to the nozzle struct
*
* ipaddr_list - list of strings containing either an IPv4 or an IPv6 address and their prefixes.
*
* entries - entries recorded.
*
* @return
* 0 on success
* -1 on error and errno is set.
* ipaddr_list is a malloc'ed buffer that the user needs to parse and free after use. ipaddr_list can
* be NULL if entries is 0.
*
*/
int nozzle_get_ips(const nozzle_t nozzle, char **ipaddr_list, int *entries);
/**
* nozzle_get_mtu
* @brief retrive mtu on a given nozzle interface
*
* nozzle - pointer to the nozzle struct
*
* @return
* MTU on success
* -1 on error and errno is set.
*/
int nozzle_get_mtu(const nozzle_t nozzle);
/**
* nozzle_set_mtu
* @brief set mtu on a given nozzle interface
*
* nozzle - pointer to the nozzle struct
*
* mtu - new MTU value
*
* error_string - pointer to string to record errors from ipaddr2 (Linux) or ifconfig (BSD)
* when re-instanting IPv6 address if MTU is becoming again > 1280.
* The string is malloc'ed, the caller needs to free this buffer.
*
* @return
* 0 on success
* -1 on error and errno is set.
* error_string is set to NULL on success
* error_string will contain a string recording the execution error.
*/
int nozzle_set_mtu(nozzle_t nozzle, const int mtu, char **error_string);
/**
* nozzle_reset_mtu
* @brief reset mtu on a given nozzle interface to the system default
*
* nozzle - pointer to the nozzle struct
*
* error_string - pointer to string to record errors from ipaddr2 (Linux) or ifconfig (BSD)
* when re-instanting IPv6 address if MTU is becoming again > 1280.
* The string is malloc'ed, the caller needs to free this buffer.
*
* @return
* 0 on success
* -1 on error and errno is set.
* error_string is set to NULL on success
* error_string will contain a string recording the execution error.
*/
int nozzle_reset_mtu(nozzle_t nozzle, char **error_string);
/**
* nozzle_get_mac
* @brief retrive mac address on a given nozzle interface
*
* nozzle - pointer to the nozzle struct
*
* ether_addr - pointers to string containing the current mac address.
* The string is malloc'ed, the caller needs to free this buffer.
* @return
* 0 on success.
* -1 on error and errno is set.
*/
int nozzle_get_mac(const nozzle_t nozzle, char **ether_addr);
/**
* nozzle_set_mac
* @brief set mac address on a given nozzle interface
*
* nozzle - pointer to the nozzle struct
*
* ether_addr - pointers to string containing the new mac address.
*
* @return
* 0 on success.
* -1 on error and errno is set.
*/
int nozzle_set_mac(nozzle_t nozzle, const char *ether_addr);
/**
* nozzle_reset_mac
* @brief reset mac address on a given nozzle interface to system default
*
* nozzle - pointer to the nozzle struct
*
* @return
* 0 on success.
* -1 on error and errno is set.
*/
int nozzle_reset_mac(nozzle_t nozzle);
/**
* nozzle_get_handle_by_name
* @brief find a nozzle handle by device name
*
* devname - string containing the name of the interface
*
* @return
* handle on success.
* NULL on error and errno is set.
*/
-nozzle_t nozzle_get_handle_by_name(char *devname);
+nozzle_t nozzle_get_handle_by_name(const char *devname);
/**
* nozzle_get_name_by_handle
* @brief retrive nozzle interface name by handle
*
* nozzle - pointer to the nozzle struct
*
* @return
* pointer to the interface name
* NULL on error and errno is set.
*/
const char *nozzle_get_name_by_handle(const nozzle_t nozzle);
/**
* nozzle_get_fd
* @brief
*
* nozzle - pointer to the nozzle struct
*
* @return
* fd associated to a given nozzle on success.
* -1 on error and errno is set.
*/
int nozzle_get_fd(const nozzle_t nozzle);
#endif

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