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diff --git a/libnozzle/libnozzle.c b/libnozzle/libnozzle.c
index 3e32d97c..1254fc21 100644
--- a/libnozzle/libnozzle.c
+++ b/libnozzle/libnozzle.c
@@ -1,2784 +1,2793 @@
/*
* 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"
#define MAX_IP_CHAR 128
#define MAX_PREFIX_CHAR 4
#define MAX_MAC_CHAR 18
struct _ip {
char ip_addr[MAX_IP_CHAR];
char prefix[MAX_PREFIX_CHAR];
int domain;
struct _ip *next;
};
struct nozzle_iface {
struct ifreq ifr;
int fd;
char nozzlename[IFNAMSIZ];
char default_mac[MAX_MAC_CHAR];
int default_mtu;
int current_mtu;
char updownpath[PATH_MAX - 11 - 1 - IFNAMSIZ]; /* 11 = post-down.d 1 = / */
int hasupdown;
int up;
struct _ip *ip;
struct nozzle_iface *next;
};
#define ifname ifr.ifr_name
struct _config {
struct nozzle_iface *head;
int sockfd;
};
static int lib_init = 0;
static struct _config lib_cfg;
static pthread_mutex_t lib_mutex = PTHREAD_MUTEX_INITIALIZER;
/* forward declarations */
static int _execute_shell(const char *command, char **error_string);
static int _exec_updown(const nozzle_t nozzle, const char *action, char **error_string);
static int _read_pipe(int fd, char **file, size_t *length);
static int _check(const nozzle_t nozzle);
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 *ip_addr, const char *prefix);
static int _set_ip(nozzle_t nozzle, const char *command,
const char *ip_addr, const char *prefix,
char **error_string, int secondary);
static int _find_ip(nozzle_t nozzle,
const char *ip_addr, const char *prefix,
struct _ip **ip, struct _ip **ip_prev);
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;
}
static int _execute_shell(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;
}
static int _exec_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->nozzlename);
err = stat(command, &sb);
if ((err < 0) && (errno == ENOENT))
return 0;
err = _execute_shell(command, error_string);
if ((!err) && (*error_string)) {
free(*error_string);
*error_string = NULL;
}
return err;
}
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)
{
if (!nozzle)
return;
if (nozzle->fd)
close(nozzle->fd);
#ifdef KNET_BSD
memset(&nozzle->ifr, 0, sizeof(struct ifreq));
strncpy(nozzle->ifname, nozzle->nozzlename, IFNAMSIZ);
ioctl(lib_cfg.sockfd, SIOCIFDESTROY, &nozzle->ifr);
#endif
free(nozzle);
return;
}
static void _close_cfg(void)
{
if (lib_cfg.head == NULL) {
close(lib_cfg.sockfd);
lib_init = 0;
}
}
static int _get_mtu(const nozzle_t nozzle)
{
int err = 0, savederrno = 0;
memset(&nozzle->ifr, 0, sizeof(struct ifreq));
strncpy(nozzle->ifname, nozzle->nozzlename, IFNAMSIZ);
err = ioctl(lib_cfg.sockfd, SIOCGIFMTU, &nozzle->ifr);
if (err) {
savederrno = errno;
goto out_clean;
}
err = nozzle->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;
char mac[MAX_MAC_CHAR];
#ifdef KNET_BSD
struct ifaddrs *ifap = NULL;
struct ifaddrs *ifa;
int found = 0;
#endif
memset(&mac, 0, MAX_MAC_CHAR);
memset(&nozzle->ifr, 0, sizeof(struct ifreq));
strncpy(nozzle->ifname, nozzle->nozzlename, IFNAMSIZ);
#ifdef KNET_LINUX
err = ioctl(lib_cfg.sockfd, SIOCGIFHWADDR, &nozzle->ifr);
if (err) {
savederrno = errno;
goto out_clean;
}
ether_ntoa_r((struct ether_addr *)nozzle->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->nozzlename, 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(&lib_mutex);
if (savederrno) {
errno = savederrno;
return NULL;
}
nozzle = lib_cfg.head;
while (nozzle != NULL) {
if (!strcmp(devname, nozzle->nozzlename))
break;
nozzle = nozzle->next;
}
if (!nozzle) {
savederrno = ENOENT;
}
pthread_mutex_unlock(&lib_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_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;
}
/* 14: 2 for /, 1 for \0 + 11 (post-down.d) */
if (strlen(updownpath) >= (PATH_MAX - (strlen(devname) + 14))) {
errno = E2BIG;
return NULL;
}
}
savederrno = pthread_mutex_lock(&lib_mutex);
if (savederrno) {
errno = savederrno;
return NULL;
}
if (!lib_init) {
lib_cfg.head = NULL;
#ifdef KNET_LINUX
lib_cfg.sockfd = socket(AF_INET, SOCK_STREAM, 0);
#endif
#ifdef KNET_BSD
lib_cfg.sockfd = socket(AF_LOCAL, SOCK_DGRAM, 0);
#endif
if (lib_cfg.sockfd < 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->nozzlename, curnozzle, IFNAMSIZ);
#endif
#ifdef KNET_LINUX
if ((nozzle->fd = open("/dev/net/tun", O_RDWR)) < 0) {
savederrno = errno;
goto out_error;
}
memset(&nozzle->ifr, 0, sizeof(struct ifreq));
strncpy(nozzle->ifname, devname, IFNAMSIZ);
nozzle->ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
if (ioctl(nozzle->fd, TUNSETIFF, &nozzle->ifr) < 0) {
savederrno = errno;
goto out_error;
}
if ((strlen(devname) > 0) && (strcmp(devname, nozzle->ifname) != 0)) {
errno = EBUSY;
goto out_error;
}
strncpy(devname, nozzle->ifname, IFNAMSIZ);
strncpy(nozzle->nozzlename, nozzle->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(&lib_mutex);
errno = savederrno;
return nozzle;
out_error:
_close(nozzle);
_close_cfg();
pthread_mutex_unlock(&lib_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 _ip *ip, *ip_next;
char *error_string = NULL;
savederrno = pthread_mutex_lock(&lib_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->ip_addr, 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(&lib_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(&lib_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(&lib_mutex);
savederrno = errno;
return err;
}
int nozzle_set_mtu(nozzle_t nozzle, const int mtu, char **error_string)
{
int err = 0, savederrno = 0;
struct _ip *tmp_ip;
if ((!nozzle) || (!mtu) || (!error_string)) {
errno = EINVAL;
return -1;
}
savederrno = pthread_mutex_lock(&lib_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;
}
nozzle->ifr.ifr_mtu = mtu;
err = ioctl(lib_cfg.sockfd, SIOCSIFMTU, &nozzle->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->ip_addr, 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(&lib_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(&lib_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(&lib_mutex);
errno = savederrno;
return err;
}
int nozzle_set_mac(nozzle_t nozzle, const char *ether_addr)
{
int err = 0, savederrno = 0;
if ((!nozzle) || (!ether_addr)) {
errno = EINVAL;
return -1;
}
savederrno = pthread_mutex_lock(&lib_mutex);
if (savederrno) {
errno = savederrno;
return -1;
}
if (!_check(nozzle)) {
errno = EINVAL;
err = -1;
goto out_clean;
}
memset(&nozzle->ifr, 0, sizeof(struct ifreq));
strncpy(nozzle->ifname, nozzle->nozzlename, IFNAMSIZ);
#ifdef KNET_LINUX
err = ioctl(lib_cfg.sockfd, SIOCGIFHWADDR, &nozzle->ifr);
if (err) {
savederrno = errno;
goto out_clean;
}
memmove(nozzle->ifr.ifr_hwaddr.sa_data, ether_aton(ether_addr), ETH_ALEN);
err = ioctl(lib_cfg.sockfd, SIOCSIFHWADDR, &nozzle->ifr);
savederrno = errno;
#endif
#ifdef KNET_BSD
err = ioctl(lib_cfg.sockfd, SIOCGIFADDR, &nozzle->ifr);
if (err) {
savederrno = errno;
goto out_clean;
}
memmove(nozzle->ifr.ifr_addr.sa_data, ether_aton(ether_addr), ETHER_ADDR_LEN);
nozzle->ifr.ifr_addr.sa_len = ETHER_ADDR_LEN;
err = ioctl(lib_cfg.sockfd, SIOCSIFLLADDR, &nozzle->ifr);
savederrno = errno;
#endif
out_clean:
pthread_mutex_unlock(&lib_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;
if (!nozzle) {
errno = EINVAL;
return -1;
}
savederrno = pthread_mutex_lock(&lib_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(&nozzle->ifr, 0, sizeof(struct ifreq));
strncpy(nozzle->ifname, nozzle->nozzlename, IFNAMSIZ);
err = ioctl(lib_cfg.sockfd, SIOCGIFFLAGS, &nozzle->ifr);
if (err) {
savederrno = errno;
goto out_clean;
}
_exec_updown(nozzle, "pre-up.d", error_preup);
nozzle->ifr.ifr_flags |= IFF_UP | IFF_RUNNING;
err = ioctl(lib_cfg.sockfd, SIOCSIFFLAGS, &nozzle->ifr);
if (err) {
savederrno = errno;
goto out_clean;
}
_exec_updown(nozzle, "up.d", error_up);
nozzle->up = 1;
out_clean:
pthread_mutex_unlock(&lib_mutex);
errno = savederrno;
return err;
}
static int _set_down(nozzle_t nozzle, char **error_down, char **error_postdown)
{
int err = 0, savederrno = 0;
if (!nozzle->up) {
goto out_clean;
}
memset(&nozzle->ifr, 0, sizeof(struct ifreq));
strncpy(nozzle->ifname, nozzle->nozzlename, IFNAMSIZ);
err = ioctl(lib_cfg.sockfd, SIOCGIFFLAGS, &nozzle->ifr);
if (err) {
savederrno = errno;
goto out_clean;
}
_exec_updown(nozzle, "down.d", error_down);
nozzle->ifr.ifr_flags &= ~IFF_UP;
err = ioctl(lib_cfg.sockfd, SIOCSIFFLAGS, &nozzle->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(&lib_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(&lib_mutex);
errno = savederrno;
return err;
}
static char *_get_v4_broadcast(const char *ip_addr, 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, ip_addr, &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 *ip_addr, 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(ip_addr, ':')) {
broadcast = _get_v4_broadcast(ip_addr, 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, ip_addr, prefix,
nozzle->nozzlename, broadcast);
} else {
snprintf(cmdline, sizeof(cmdline)-1,
"ip addr %s %s/%s dev %s",
command, ip_addr, prefix,
nozzle->nozzlename);
}
#endif
#ifdef KNET_BSD
if (!strcmp(command, "add")) {
snprintf(cmdline, sizeof(cmdline)-1,
"ifconfig %s %s %s/%s",
nozzle->nozzlename, proto, ip_addr, 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->nozzlename, proto, ip_addr, prefix);
}
#endif
if (broadcast) {
free(broadcast);
}
return _execute_shell(cmdline, error_string);
}
static int _find_ip(nozzle_t nozzle,
const char *ip_addr, const char *prefix,
struct _ip **ip, struct _ip **ip_prev)
{
struct _ip *local_ip, *local_ip_prev;
int found = 0;
local_ip = local_ip_prev = nozzle->ip;
while(local_ip) {
if ((!strcmp(local_ip->ip_addr, ip_addr)) && (!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 *ip_addr, const char *prefix, char **error_string)
{
int err = 0, savederrno = 0;
int found = 0;
struct _ip *ip = NULL, *ip_prev = NULL, *ip_last = NULL;
int secondary = 0;
if ((!nozzle) || (!ip_addr) || (!prefix) || (!error_string)) {
errno = EINVAL;
return -1;
}
savederrno = pthread_mutex_lock(&lib_mutex);
if (savederrno) {
errno = savederrno;
return -1;
}
if (!_check(nozzle)) {
errno = EINVAL;
err = -1;
goto out_clean;
}
found = _find_ip(nozzle, ip_addr, prefix, &ip, &ip_prev);
if (found) {
goto out_clean;
}
ip = malloc(sizeof(struct _ip));
if (!ip) {
savederrno = errno;
err = -1 ;
goto out_clean;
}
memset(ip, 0, sizeof(struct _ip));
strncpy(ip->ip_addr, ip_addr, MAX_IP_CHAR);
strncpy(ip->prefix, prefix, MAX_PREFIX_CHAR);
if (!strchr(ip->ip_addr, ':')) {
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", ip_addr, 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(&lib_mutex);
errno = savederrno;
return err;
}
int nozzle_del_ip(nozzle_t nozzle, const char *ip_addr, const char *prefix, char **error_string)
{
int err = 0, savederrno = 0;
int found = 0;
struct _ip *ip = NULL, *ip_prev = NULL;
if ((!nozzle) || (!ip_addr) || (!prefix) || (!error_string)) {
errno = EINVAL;
return -1;
}
savederrno = pthread_mutex_lock(&lib_mutex);
if (savederrno) {
errno = savederrno;
return -1;
}
if (!_check(nozzle)) {
errno = EINVAL;
err = -1;
goto out_clean;
}
found = _find_ip(nozzle, ip_addr, prefix, &ip, &ip_prev);
if (!found) {
goto out_clean;
}
err = _set_ip(nozzle, "del", ip_addr, 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(&lib_mutex);
errno = savederrno;
return err;
}
int nozzle_get_fd(const nozzle_t nozzle)
{
- int fd;
+ int fd = -1, savederrno = 0;
- pthread_mutex_lock(&lib_mutex);
+ if (!nozzle) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ savederrno = pthread_mutex_lock(&lib_mutex);
+ if (savederrno) {
+ errno = savederrno;
+ return -1;
+ }
if (!_check(nozzle)) {
- errno = EINVAL;
+ savederrno = ENOENT;
fd = -1;
goto out_clean;
}
fd = nozzle->fd;
out_clean:
pthread_mutex_unlock(&lib_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(&lib_mutex);
if (savederrno) {
errno = savederrno;
return NULL;
}
if (!_check(nozzle)) {
errno = ENOENT;
goto out_clean;
}
name = nozzle->nozzlename;
out_clean:
pthread_mutex_unlock(&lib_mutex);
errno = savederrno;
return name;
}
int nozzle_get_ips(const nozzle_t nozzle, char **ip_addr_list, int *entries)
{
int err = 0, savederrno = 0;
int found = 0;
char *ip_list = NULL;
int size = 0, offset = 0, len;
struct _ip *ip = NULL;
if ((!nozzle) || (!ip_addr_list) || (!entries)) {
errno = EINVAL;
return -1;
}
savederrno = pthread_mutex_lock(&lib_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) {
*ip_addr_list = NULL;
*entries = 0;
goto out_clean;
}
size = found * (MAX_IP_CHAR + MAX_PREFIX_CHAR + 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->ip_addr);
memmove(ip_list + offset, ip->ip_addr, len);
offset = offset + len + 1;
len = strlen(ip->prefix);
memmove(ip_list + offset, ip->prefix, len);
offset = offset + len + 1;
ip = ip->next;
}
*ip_addr_list = ip_list;
*entries = found;
out_clean:
pthread_mutex_unlock(&lib_mutex);
errno = savederrno;
return err;
}
#ifdef TEST
char testipv4_1[1024];
char testipv4_2[1024];
char testipv6_1[1024];
char testipv6_2[1024];
/*
* use this one to randomize knet interface name
* for named creation test
*/
uint8_t randombyte = 0;
static int is_if_in_system(char *name)
{
struct ifaddrs *ifap = NULL;
struct ifaddrs *ifa;
int found = 0;
if (getifaddrs(&ifap) < 0) {
printf("Unable to get interface list.\n");
return -1;
}
ifa = ifap;
while (ifa) {
if (!strncmp(name, ifa->ifa_name, IFNAMSIZ)) {
found = 1;
break;
}
ifa=ifa->ifa_next;
}
freeifaddrs(ifap);
return found;
}
static int test_iface(char *name, size_t size, const char *updownpath)
{
nozzle_t nozzle;
char *error_down = NULL, *error_postdown = NULL;
nozzle=nozzle_open(name, size, updownpath);
if (!nozzle) {
if (lib_cfg.sockfd < 0)
printf("Unable to open knet_socket\n");
printf("Unable to open knet.\n");
return -1;
}
printf("Created interface: %s\n", name);
if (is_if_in_system(name) > 0) {
printf("Found interface %s on the system\n", name);
} else {
printf("Unable to find interface %s on the system\n", name);
}
if (!nozzle_get_handle_by_name(name)) {
printf("Unable to find interface %s in nozzle db\n", name);
} else {
printf("Found interface %s in nozzle db\n", name);
}
nozzle_close(nozzle, &error_down, &error_postdown);
if (error_down) {
printf("Error from error_down: %s\n", error_down);
free(error_down);
}
if (error_postdown) {
printf("Error from error_down: %s\n", error_postdown);
free(error_postdown);
}
if (is_if_in_system(name) == 0)
printf("Successfully removed interface %s from the system\n", name);
return 0;
}
static int check_nozzle_open_close(void)
{
char device_name[2*IFNAMSIZ];
char fakepath[PATH_MAX];
size_t size = IFNAMSIZ;
memset(device_name, 0, sizeof(device_name));
printf("Creating random nozzle interface:\n");
if (test_iface(device_name, size, NULL) < 0) {
printf("Unable to create random interface\n");
return -1;
}
#ifdef KNET_LINUX
printf("Creating kronostest%u nozzle interface:\n", randombyte);
snprintf(device_name, IFNAMSIZ, "kronostest%u", randombyte);
if (test_iface(device_name, size, NULL) < 0) {
printf("Unable to create kronostest%u interface\n", randombyte);
return -1;
}
#endif
#ifdef KNET_BSD
printf("Creating tap%u nozzle interface:\n", randombyte);
snprintf(device_name, IFNAMSIZ, "tap%u", randombyte);
if (test_iface(device_name, size, NULL) < 0) {
printf("Unable to create tap%u interface\n", randombyte);
return -1;
}
printf("Creating kronostest%u nozzle interface:\n", randombyte);
snprintf(device_name, IFNAMSIZ, "kronostest%u", randombyte);
if (test_iface(device_name, size, NULL) == 0) {
printf("BSD should not accept kronostest%u interface\n", randombyte);
return -1;
}
#endif
printf("Testing ERROR conditions\n");
printf("Testing dev == NULL\n");
errno=0;
if ((test_iface(NULL, size, NULL) >= 0) || (errno != EINVAL)) {
printf("Something is wrong in nozzle_open sanity checks\n");
return -1;
}
printf("Testing size < IFNAMSIZ\n");
errno=0;
if ((test_iface(device_name, 1, NULL) >= 0) || (errno != EINVAL)) {
printf("Something is wrong in nozzle_open sanity checks\n");
return -1;
}
printf("Testing device_name size > IFNAMSIZ\n");
errno=0;
strcpy(device_name, "abcdefghilmnopqrstuvwz");
if ((test_iface(device_name, IFNAMSIZ, NULL) >= 0) || (errno != E2BIG)) {
printf("Something is wrong in nozzle_open sanity checks\n");
return -1;
}
printf("Testing updown path != abs\n");
errno=0;
memset(device_name, 0, IFNAMSIZ);
if ((test_iface(device_name, IFNAMSIZ, "foo") >= 0) || (errno != EINVAL)) {
printf("Something is wrong in nozzle_open sanity checks\n");
return -1;
}
memset(fakepath, 0, PATH_MAX);
memset(fakepath, '/', PATH_MAX - 2);
printf("Testing updown path > PATH_MAX\n");
errno=0;
memset(device_name, 0, IFNAMSIZ);
if ((test_iface(device_name, IFNAMSIZ, fakepath) >= 0) || (errno != E2BIG)) {
printf("Something is wrong in nozzle_open sanity checks\n");
return -1;
}
return 0;
}
static int check_knet_multi_eth(void)
{
char device_name1[IFNAMSIZ];
char device_name2[IFNAMSIZ];
size_t size = IFNAMSIZ;
int err=0;
nozzle_t nozzle1 = NULL;
nozzle_t nozzle2 = NULL;
char *error_down = NULL, *error_postdown = NULL;
printf("Testing multiple knet interface instances\n");
memset(device_name1, 0, size);
memset(device_name2, 0, size);
nozzle1 = nozzle_open(device_name1, size, NULL);
if (!nozzle1) {
printf("Unable to init %s\n", device_name1);
err = -1;
goto out_clean;
}
if (is_if_in_system(device_name1) > 0) {
printf("Found interface %s on the system\n", device_name1);
} else {
printf("Unable to find interface %s on the system\n", device_name1);
}
nozzle2 = nozzle_open(device_name2, size, NULL);
if (!nozzle2) {
printf("Unable to init %s\n", device_name2);
err = -1;
goto out_clean;
}
if (is_if_in_system(device_name2) > 0) {
printf("Found interface %s on the system\n", device_name2);
} else {
printf("Unable to find interface %s on the system\n", device_name2);
}
if (nozzle1) {
nozzle_close(nozzle1, &error_down, &error_postdown);
if (error_down) {
printf("Error from error_down: %s\n", error_down);
free(error_down);
}
if (error_postdown) {
printf("Error from error_down: %s\n", error_postdown);
free(error_postdown);
}
}
if (nozzle2) {
nozzle_close(nozzle2, &error_down, &error_postdown);
if (error_down) {
printf("Error from error_down: %s\n", error_down);
free(error_down);
}
if (error_postdown) {
printf("Error from error_down: %s\n", error_postdown);
free(error_postdown);
}
}
printf("Testing error conditions\n");
printf("Open same device twice\n");
memset(device_name1, 0, size);
nozzle1 = nozzle_open(device_name1, size, NULL);
if (!nozzle1) {
printf("Unable to init %s\n", device_name1);
err = -1;
goto out_clean;
}
if (is_if_in_system(device_name1) > 0) {
printf("Found interface %s on the system\n", device_name1);
} else {
printf("Unable to find interface %s on the system\n", device_name1);
}
nozzle2 = nozzle_open(device_name1, size, NULL);
if (nozzle2) {
printf("We were able to init 2 interfaces with the same name!\n");
err = -1;
goto out_clean;
}
out_clean:
if (nozzle1) {
nozzle_close(nozzle1, &error_down, &error_postdown);
if (error_down) {
printf("Error from error_down: %s\n", error_down);
free(error_down);
}
if (error_postdown) {
printf("Error from error_down: %s\n", error_postdown);
free(error_postdown);
}
}
if (nozzle2) {
nozzle_close(nozzle2, &error_down, &error_postdown);
if (error_down) {
printf("Error from error_down: %s\n", error_down);
free(error_down);
}
if (error_postdown) {
printf("Error from error_down: %s\n", error_postdown);
free(error_postdown);
}
}
return err;
}
static int check_knet_mtu(void)
{
char device_name[IFNAMSIZ];
size_t size = IFNAMSIZ;
int err=0;
nozzle_t nozzle;
char *error_down = NULL, *error_postdown = NULL;
char *error_string = NULL;
int current_mtu = 0;
int expected_mtu = 1500;
printf("Testing get/set MTU\n");
memset(device_name, 0, size);
nozzle = nozzle_open(device_name, size, NULL);
if (!nozzle) {
printf("Unable to init %s\n", device_name);
return -1;
}
printf("Comparing default MTU\n");
current_mtu = nozzle_get_mtu(nozzle);
if (current_mtu < 0) {
printf("Unable to get MTU\n");
err = -1;
goto out_clean;
}
if (current_mtu != expected_mtu) {
printf("current mtu [%d] does not match expected default [%d]\n", current_mtu, expected_mtu);
err = -1;
goto out_clean;
}
printf("Setting MTU to 9000\n");
expected_mtu = 9000;
if (nozzle_set_mtu(nozzle, expected_mtu, &error_string) < 0) {
printf("Unable to set MTU to %d\n", expected_mtu);
if (error_string) {
printf("error: %s\n", error_string);
free(error_string);
}
err = -1;
goto out_clean;
}
current_mtu = nozzle_get_mtu(nozzle);
if (current_mtu < 0) {
printf("Unable to get MTU\n");
err = -1;
goto out_clean;
}
if (current_mtu != expected_mtu) {
printf("current mtu [%d] does not match expected value [%d]\n", current_mtu, expected_mtu);
err = -1;
goto out_clean;
}
printf("Testing ERROR conditions\n");
printf("Passing empty struct to get_mtu\n");
if (nozzle_get_mtu(NULL) > 0) {
printf("Something is wrong in nozzle_get_mtu sanity checks\n");
err = -1;
goto out_clean;
}
printf("Passing empty struct to set_mtu\n");
if (nozzle_set_mtu(NULL, 1500, &error_string) == 0) {
printf("Something is wrong in nozzle_set_mtu sanity checks\n");
if (error_string) {
printf("error: %s\n", error_string);
free(error_string);
}
err = -1;
goto out_clean;
}
out_clean:
if (nozzle) {
nozzle_close(nozzle, &error_down, &error_postdown);
if (error_down) {
printf("Error from error_down: %s\n", error_down);
free(error_down);
}
if (error_postdown) {
printf("Error from error_down: %s\n", error_postdown);
free(error_postdown);
}
}
return err;
}
static int check_knet_mtu_ipv6(void)
{
char device_name[IFNAMSIZ];
size_t size = IFNAMSIZ;
char verifycmd[1024];
int err=0;
nozzle_t nozzle;
char *error_string = NULL;
char *error_down = NULL, *error_postdown = NULL;
printf("Testing get/set MTU with IPv6 address\n");
memset(device_name, 0, size);
nozzle = nozzle_open(device_name, size, NULL);
if (!nozzle) {
printf("Unable to init %s\n", device_name);
return -1;
}
printf("Adding ip: %s/64\n", testipv6_1);
err = nozzle_add_ip(nozzle, testipv6_1, "64", &error_string);
if (error_string) {
printf("add ipv6 output: %s\n", error_string);
free(error_string);
error_string = NULL;
}
if (err) {
printf("Unable to assign IP address\n");
err=-1;
sleep(30);
goto out_clean;
}
memset(verifycmd, 0, sizeof(verifycmd));
snprintf(verifycmd, sizeof(verifycmd)-1,
#ifdef KNET_LINUX
"ip addr show dev %s | grep -q %s/64", nozzle->nozzlename, testipv6_1);
#endif
#ifdef KNET_BSD
"ifconfig %s | grep -q %s", nozzle->nozzlename, testipv6_1);
#endif
err = _execute_shell(verifycmd, &error_string);
if (error_string) {
printf("Error string: %s\n", error_string);
free(error_string);
error_string = NULL;
}
if (err) {
printf("Unable to verify IP address\n");
err=-1;
goto out_clean;
}
printf("Setting MTU to 1200\n");
if (nozzle_set_mtu(nozzle, 1200, &error_string) < 0) {
printf("Unable to set MTU to 1200\n");
if (error_string) {
printf("error: %s\n", error_string);
free(error_string);
}
err = -1;
goto out_clean;
}
err = _execute_shell(verifycmd, &error_string);
if (error_string) {
printf("Error string: %s\n", error_string);
free(error_string);
error_string = NULL;
}
#ifdef KNET_LINUX
if (!err) {
#endif
#ifdef KNET_BSD
if (err) {
#endif
printf("Unable to verify IP address\n");
err=-1;
goto out_clean;
}
printf("Adding ip: %s/64\n", testipv6_2);
err = nozzle_add_ip(nozzle, testipv6_2, "64", &error_string);
if (error_string) {
printf("add ipv6 output: %s\n", error_string);
free(error_string);
error_string = NULL;
}
if (err < 0) {
printf("Unable to assign IP address\n");
err=-1;
goto out_clean;
}
memset(verifycmd, 0, sizeof(verifycmd));
snprintf(verifycmd, sizeof(verifycmd)-1,
#ifdef KNET_LINUX
"ip addr show dev %s | grep -q %s/64", nozzle->nozzlename, testipv6_2);
#endif
#ifdef KNET_BSD
"ifconfig %s | grep -q %s", nozzle->nozzlename, testipv6_2);
#endif
err = _execute_shell(verifycmd, &error_string);
if (error_string) {
printf("Error string: %s\n", error_string);
free(error_string);
error_string = NULL;
}
if (!err) {
printf("Unable to verify IP address\n");
err=-1;
goto out_clean;
}
printf("Restoring MTU to default\n");
if (nozzle_reset_mtu(nozzle, &error_string) < 0) {
printf("Unable to reset mtu\n");
if (error_string) {
printf("error: %s\n", error_string);
free(error_string);
}
err = -1;
goto out_clean;
}
memset(verifycmd, 0, sizeof(verifycmd));
snprintf(verifycmd, sizeof(verifycmd)-1,
#ifdef KNET_LINUX
"ip addr show dev %s | grep -q %s/64", nozzle->nozzlename, testipv6_1);
#endif
#ifdef KNET_BSD
"ifconfig %s | grep -q %s", nozzle->nozzlename, testipv6_1);
#endif
err = _execute_shell(verifycmd, &error_string);
if (error_string) {
printf("Error string: %s\n", error_string);
free(error_string);
error_string = NULL;
}
if (err) {
printf("Unable to verify IP address\n");
err=-1;
goto out_clean;
}
memset(verifycmd, 0, sizeof(verifycmd));
snprintf(verifycmd, sizeof(verifycmd)-1,
#ifdef KNET_LINUX
"ip addr show dev %s | grep -q %s/64", nozzle->nozzlename, testipv6_2);
#endif
#ifdef KNET_BSD
"ifconfig %s | grep -q %s", nozzle->nozzlename, testipv6_2);
#endif
err = _execute_shell(verifycmd, &error_string);
if (error_string) {
printf("Error string: %s\n", error_string);
free(error_string);
error_string = NULL;
}
if (err) {
printf("Unable to verify IP address\n");
err=-1;
goto out_clean;
}
out_clean:
if (nozzle) {
nozzle_close(nozzle, &error_down, &error_postdown);
if (error_down) {
printf("Error from error_down: %s\n", error_down);
free(error_down);
}
if (error_postdown) {
printf("Error from error_down: %s\n", error_postdown);
free(error_postdown);
}
}
return err;
}
static int check_knet_mac(void)
{
char device_name[IFNAMSIZ];
size_t size = IFNAMSIZ;
int err=0;
nozzle_t nozzle;
char *current_mac = NULL, *temp_mac = NULL, *err_mac = NULL;
struct ether_addr *cur_mac, *tmp_mac;
char *error_down = NULL, *error_postdown = NULL;
printf("Testing get/set MAC\n");
memset(device_name, 0, size);
nozzle = nozzle_open(device_name, size, NULL);
if (!nozzle) {
printf("Unable to init %s\n", device_name);
return -1;
}
printf("Get current MAC\n");
if (nozzle_get_mac(nozzle, &current_mac) < 0) {
printf("Unable to get current MAC address.\n");
err = -1;
goto out_clean;
}
printf("Current MAC: %s\n", current_mac);
printf("Setting MAC: 00:01:01:01:01:01\n");
if (nozzle_set_mac(nozzle, "00:01:01:01:01:01") < 0) {
printf("Unable to set current MAC address.\n");
err = -1;
goto out_clean;
}
if (nozzle_get_mac(nozzle, &temp_mac) < 0) {
printf("Unable to get current MAC address.\n");
err = -1;
goto out_clean;
}
printf("Current MAC: %s\n", temp_mac);
cur_mac = ether_aton(current_mac);
tmp_mac = ether_aton(temp_mac);
printf("Comparing MAC addresses\n");
if (memcmp(cur_mac, tmp_mac, sizeof(struct ether_addr))) {
printf("Mac addresses are not the same?!\n");
err = -1;
sleep(20);
goto out_clean;
}
printf("Testing ERROR conditions\n");
printf("Pass NULL to get_mac (pass1)\n");
errno = 0;
if ((nozzle_get_mac(NULL, &err_mac) >= 0) || (errno != EINVAL)) {
printf("Something is wrong in nozzle_get_mac sanity checks\n");
err = -1;
goto out_clean;
}
printf("Pass NULL to get_mac (pass2)\n");
errno = 0;
if ((nozzle_get_mac(nozzle, NULL) >= 0) || (errno != EINVAL)) {
printf("Something is wrong in nozzle_get_mac sanity checks\n");
err = -1;
goto out_clean;
}
printf("Pass NULL to set_mac (pass1)\n");
errno = 0;
if ((nozzle_set_mac(nozzle, NULL) >= 0) || (errno != EINVAL)) {
printf("Something is wrong in nozzle_set_mac sanity checks\n");
err = -1;
goto out_clean;
}
printf("Pass NULL to set_mac (pass2)\n");
errno = 0;
if ((nozzle_set_mac(NULL, err_mac) >= 0) || (errno != EINVAL)) {
printf("Something is wrong in nozzle_set_mac sanity checks\n");
err = -1;
goto out_clean;
}
out_clean:
if (err_mac) {
printf("Something managed to set err_mac!\n");
err = -1;
free(err_mac);
}
if (current_mac)
free(current_mac);
if (temp_mac)
free(temp_mac);
if (nozzle) {
nozzle_close(nozzle, &error_down, &error_postdown);
if (error_down) {
printf("Error from error_down: %s\n", error_down);
free(error_down);
}
if (error_postdown) {
printf("Error from error_down: %s\n", error_postdown);
free(error_postdown);
}
}
return err;
}
static int check_nozzle_execute_shell(void)
{
int err = 0;
char command[4096];
char *error_string = NULL;
memset(command, 0, sizeof(command));
printf("Testing _execute_shell\n");
printf("command true\n");
err = _execute_shell("true", &error_string);
if (error_string) {
printf("Error string: %s\n", error_string);
free(error_string);
error_string = NULL;
}
if (err) {
printf("Unable to execute true ?!?!\n");
goto out_clean;
}
printf("Testing ERROR conditions\n");
printf("command false\n");
err = _execute_shell("false", &error_string);
if (error_string) {
printf("Error string: %s\n", error_string);
free(error_string);
error_string = NULL;
}
if (!err) {
printf("Can we really execute false successfully?!?!\n");
err = -1;
goto out_clean;
}
printf("command that outputs to stdout (enforcing redirect)\n");
err = _execute_shell("grep -h 2>&1", &error_string);
if (error_string) {
printf("Error string: %s\n", error_string);
free(error_string);
error_string = NULL;
}
if (!err) {
printf("Can we really execute grep -h successfully?!?\n");
err = -1;
goto out_clean;
}
printf("command that outputs to stderr\n");
err = _execute_shell("grep -h", &error_string);
if (error_string) {
printf("Error string: %s\n", error_string);
free(error_string);
error_string = NULL;
}
if (!err) {
printf("Can we really execute grep -h successfully?!?\n");
err = -1;
goto out_clean;
}
printf("empty command\n");
err = _execute_shell(NULL, &error_string);
if (error_string) {
printf("Error string: %s\n", error_string);
free(error_string);
error_string = NULL;
}
if (!err) {
printf("Can we really execute (nil) successfully?!?!\n");
err = -1;
goto out_clean;
}
printf("empty error\n");
err = _execute_shell("true", NULL);
if (!err) {
printf("Check EINVAL filter for no error_string!\n");
err = -1;
goto out_clean;
}
err = 0;
out_clean:
return err;
}
static int check_knet_up_down(void)
{
char verifycmd[1024];
char device_name[IFNAMSIZ];
size_t size = IFNAMSIZ;
int err=0;
nozzle_t nozzle;
char *error_string = NULL;
char *error_preup = NULL, *error_up = NULL;
char *error_down = NULL, *error_postdown = NULL;
printf("Testing interface up/down\n");
memset(device_name, 0, size);
nozzle = nozzle_open(device_name, size, NULL);
if (!nozzle) {
printf("Unable to init %s\n", device_name);
return -1;
}
printf("Put the interface up\n");
err = nozzle_set_up(nozzle, &error_preup, &error_up);
if (error_preup) {
printf("preup output: %s\n", error_preup);
free(error_preup);
error_preup = NULL;
}
if (error_up) {
printf("up output: %s\n", error_up);
free(error_up);
error_up = NULL;
}
if (err < 0) {
printf("Unable to set interface up\n");
err = -1;
goto out_clean;
}
memset(verifycmd, 0, sizeof(verifycmd));
snprintf(verifycmd, sizeof(verifycmd)-1,
#ifdef KNET_LINUX
"ip addr show dev %s | grep -q UP", nozzle->nozzlename);
#endif
#ifdef KNET_BSD
"ifconfig %s | grep -q UP", nozzle->nozzlename);
#endif
err = _execute_shell(verifycmd, &error_string);
if (error_string) {
printf("Error string: %s\n", error_string);
free(error_string);
error_string = NULL;
}
if (err < 0) {
printf("Unable to verify inteface UP\n");
err = -1;
goto out_clean;
}
printf("Put the interface down\n");
err = nozzle_set_down(nozzle, &error_down, &error_postdown);
if (error_down) {
printf("down output: %s\n", error_down);
free(error_down);
error_down = NULL;
}
if (error_postdown) {
printf("postdown output: %s\n", error_down);
free(error_down);
error_down = NULL;
}
if (err < 0) {
printf("Unable to put the interface down\n");
err = -1;
goto out_clean;
}
memset(verifycmd, 0, sizeof(verifycmd));
snprintf(verifycmd, sizeof(verifycmd)-1,
#ifdef KNET_LINUX
"ip addr show dev %s | grep -q UP", nozzle->nozzlename);
#endif
#ifdef KNET_BSD
"ifconfig %s | grep -q UP", nozzle->nozzlename);
#endif
err = _execute_shell(verifycmd, &error_string);
if (error_string) {
printf("Error string: %s\n", error_string);
free(error_string);
error_string = NULL;
}
if (!err) {
printf("Unable to verify inteface DOWN\n");
err = -1;
goto out_clean;
}
nozzle_close(nozzle, &error_down, &error_postdown);
if (error_down) {
printf("down output: %s\n", error_down);
free(error_down);
error_down = NULL;
}
if (error_postdown) {
printf("postdown output: %s\n", error_down);
free(error_down);
error_down = NULL;
}
printf("Testing interface pre-up/up/down/post-down (exec errors)\n");
memset(device_name, 0, size);
nozzle = nozzle_open(device_name, size, ABSBUILDDIR "/nozzle_updown_bad");
if (!nozzle) {
printf("Unable to init %s\n", device_name);
return -1;
}
printf("Put the interface up\n");
err = nozzle_set_up(nozzle, &error_preup, &error_up);
if (error_preup) {
printf("preup output: %s\n", error_preup);
free(error_preup);
error_preup = NULL;
}
if (error_up) {
printf("up output: %s\n", error_up);
free(error_up);
error_up = NULL;
}
if (err < 0) {
printf("Unable to set interface up\n");
err = -1;
goto out_clean;
}
printf("Put the interface down\n");
err = nozzle_set_down(nozzle, &error_down, &error_postdown);
if (error_down) {
printf("down output: %s\n", error_down);
free(error_down);
error_down = NULL;
}
if (error_postdown) {
printf("postdown output: %s\n", error_down);
free(error_down);
error_down = NULL;
}
if (err < 0) {
printf("Unable to put the interface down\n");
err = -1;
goto out_clean;
}
nozzle_close(nozzle, &error_down, &error_postdown);
if (error_down) {
printf("down output: %s\n", error_down);
free(error_down);
error_down = NULL;
}
if (error_postdown) {
printf("postdown output: %s\n", error_down);
free(error_down);
error_down = NULL;
}
printf("Testing interface pre-up/up/down/post-down\n");
memset(device_name, 0, size);
nozzle = nozzle_open(device_name, size, ABSBUILDDIR "/nozzle_updown_good");
if (!nozzle) {
printf("Unable to init %s\n", device_name);
return -1;
}
printf("Put the interface up\n");
err = nozzle_set_up(nozzle, &error_preup, &error_up);
if (error_preup) {
printf("preup output: %s\n", error_preup);
free(error_preup);
error_preup = NULL;
}
if (error_up) {
printf("up output: %s\n", error_up);
free(error_up);
error_up = NULL;
}
if (err < 0) {
printf("Unable to set interface up\n");
err = -1;
goto out_clean;
}
printf("Put the interface down\n");
err = nozzle_set_down(nozzle, &error_down, &error_postdown);
if (error_down) {
printf("down output: %s\n", error_down);
free(error_down);
error_down = NULL;
}
if (error_postdown) {
printf("postdown output: %s\n", error_down);
free(error_down);
error_down = NULL;
}
if (err < 0) {
printf("Unable to put the interface down\n");
err = -1;
goto out_clean;
}
nozzle_close(nozzle, &error_down, &error_postdown);
if (error_down) {
printf("down output: %s\n", error_down);
free(error_down);
error_down = NULL;
}
if (error_postdown) {
printf("postdown output: %s\n", error_down);
free(error_down);
error_down = NULL;
}
printf("Test ERROR conditions\n");
printf("Pass NULL to nozzle set_up\n");
errno = 0;
if ((nozzle_set_up(NULL, &error_preup, &error_up) >= 0) || (errno != EINVAL)) {
printf("Something is wrong in nozzle_set_up sanity checks\n");
err = -1;
goto out_clean;
}
printf("Pass NULL to error_preup set_up\n");
errno = 0;
if ((nozzle_set_up(nozzle, NULL, &error_up) >= 0) || (errno != EINVAL)) {
printf("Something is wrong in nozzle_set_up sanity checks\n");
err = -1;
goto out_clean;
}
printf("Pass NULL to error_up set_up\n");
errno = 0;
if ((nozzle_set_up(nozzle, &error_preup, NULL) >= 0) || (errno != EINVAL)) {
printf("Something is wrong in nozzle_set_up sanity checks\n");
err = -1;
goto out_clean;
}
printf("Pass NULL to nozzle set_down\n");
errno = 0;
if ((nozzle_set_down(NULL, &error_down, &error_postdown) >= 0) || (errno != EINVAL)) {
printf("Something is wrong in nozzle_set_down sanity checks\n");
err = -1;
goto out_clean;
}
printf("Pass NULL to error_down set_down\n");
errno = 0;
if ((nozzle_set_down(nozzle, NULL, &error_postdown) >= 0) || (errno != EINVAL)) {
printf("Something is wrong in nozzle_set_down sanity checks\n");
err = -1;
goto out_clean;
}
printf("Pass NULL to error_postdown set_down\n");
errno = 0;
if ((nozzle_set_down(nozzle, &error_down, NULL) >= 0) || (errno != EINVAL)) {
printf("Something is wrong in nozzle_set_down sanity checks\n");
err = -1;
goto out_clean;
}
out_clean:
nozzle_close(nozzle, &error_down, &error_postdown);
if (error_down) {
printf("down output: %s\n", error_down);
free(error_down);
error_down = NULL;
}
if (error_postdown) {
printf("postdown output: %s\n", error_down);
free(error_down);
error_down = NULL;
}
return err;
}
static int check_knet_close_leak(void)
{
char device_name[IFNAMSIZ];
size_t size = IFNAMSIZ;
int err=0;
nozzle_t nozzle;
char *error_string = NULL;
char *error_down = NULL, *error_postdown = NULL;
printf("Testing close leak (needs valgrind)\n");
memset(device_name, 0, size);
nozzle = nozzle_open(device_name, size, NULL);
if (!nozzle) {
printf("Unable to init %s\n", device_name);
return -1;
}
printf("Adding ip: %s/24\n", testipv4_1);
err = nozzle_add_ip(nozzle, testipv4_1, "24", &error_string);
if (error_string) {
printf("add ip output: %s\n", error_string);
free(error_string);
error_string = NULL;
}
if (err < 0) {
printf("Unable to assign IP address\n");
err=-1;
goto out_clean;
}
printf("Adding ip: %s/24\n", testipv4_2);
err = nozzle_add_ip(nozzle, testipv4_2, "24", &error_string);
if (error_string) {
printf("add ip output: %s\n", error_string);
free(error_string);
error_string = NULL;
}
if (err < 0) {
printf("Unable to assign IP address\n");
err=-1;
goto out_clean;
}
out_clean:
nozzle_close(nozzle, &error_down, &error_postdown);
if (error_down) {
printf("down output: %s\n", error_down);
free(error_down);
error_down = NULL;
}
if (error_postdown) {
printf("postdown output: %s\n", error_down);
free(error_down);
error_down = NULL;
}
return err;
}
static int check_knet_set_del_ip(void)
{
char device_name[IFNAMSIZ];
size_t size = IFNAMSIZ;
char verifycmd[1024];
int err=0;
nozzle_t nozzle;
char *ip_list = NULL;
int ip_list_entries = 0, i, offset = 0;
char *error_string = NULL;
char *error_down = NULL, *error_postdown = NULL;
printf("Testing interface add/remove ip\n");
memset(device_name, 0, size);
nozzle = nozzle_open(device_name, size, NULL);
if (!nozzle) {
printf("Unable to init %s\n", device_name);
return -1;
}
printf("Adding ip: %s/24\n", testipv4_1);
err = nozzle_add_ip(nozzle, testipv4_1, "24", &error_string);
if (error_string) {
printf("add ip output: %s\n", error_string);
free(error_string);
error_string = NULL;
}
if (err < 0) {
printf("Unable to assign IP address\n");
err=-1;
goto out_clean;
}
printf("Adding ip: %s/24\n", testipv4_2);
err = nozzle_add_ip(nozzle, testipv4_2, "24", &error_string);
if (error_string) {
printf("add ip output: %s\n", error_string);
free(error_string);
error_string = NULL;
}
if (err < 0) {
printf("Unable to assign IP address\n");
err=-1;
goto out_clean;
}
printf("Adding duplicate ip: %s/24\n", testipv4_1);
err = nozzle_add_ip(nozzle, testipv4_1, "24", &error_string);
if (error_string) {
printf("add ip output: %s\n", error_string);
free(error_string);
error_string = NULL;
}
if (err < 0) {
printf("Unable to find IP address in libnozzle db\n");
err=-1;
goto out_clean;
}
printf("Checking ip: %s/24\n", testipv4_1);
memset(verifycmd, 0, sizeof(verifycmd));
snprintf(verifycmd, sizeof(verifycmd)-1,
#ifdef KNET_LINUX
"ip addr show dev %s | grep -q %s/24", nozzle->nozzlename, testipv4_1);
#endif
#ifdef KNET_BSD
"ifconfig %s | grep -q %s", nozzle->nozzlename, testipv4_1);
#endif
err = _execute_shell(verifycmd, &error_string);
if (error_string) {
printf("Error string: %s\n", error_string);
free(error_string);
error_string = NULL;
}
if (err) {
printf("Unable to verify IP address\n");
err=-1;
goto out_clean;
}
printf("Get ip list from libnozzle:\n");
if (nozzle_get_ips(nozzle, &ip_list, &ip_list_entries) < 0) {
printf("Not enough mem?\n");
err=-1;
goto out_clean;
}
if (ip_list_entries != 2) {
printf("Didn't get enough ip back from libnozzle?\n");
err=-1;
goto out_clean;
}
for (i = 1; i <= ip_list_entries; i++) {
printf("Found IP %s %s in libnozzle db\n", ip_list + offset, ip_list + offset + strlen(ip_list + offset) + 1);
offset = offset + strlen(ip_list) + 1;
offset = offset + strlen(ip_list + offset) + 1;
}
free(ip_list);
printf("Deleting ip: %s/24\n", testipv4_1);
err = nozzle_del_ip(nozzle, testipv4_1, "24", &error_string);
if (error_string) {
printf("del ip output: %s\n", error_string);
free(error_string);
error_string = NULL;
}
if (err < 0) {
printf("Unable to delete IP address\n");
err=-1;
goto out_clean;
}
printf("Deleting ip: %s/24\n", testipv4_2);
err = nozzle_del_ip(nozzle, testipv4_2, "24", &error_string);
if (error_string) {
printf("del ip output: %s\n", error_string);
free(error_string);
error_string = NULL;
}
if (err < 0) {
printf("Unable to delete IP address\n");
err=-1;
goto out_clean;
}
printf("Deleting again ip: %s/24\n", testipv4_1);
err = nozzle_del_ip(nozzle, testipv4_1, "24", &error_string);
if (error_string) {
printf("del ip output: %s\n", error_string);
free(error_string);
error_string = NULL;
}
if (err < 0) {
printf("Unable to delete IP address\n");
err=-1;
goto out_clean;
}
memset(verifycmd, 0, sizeof(verifycmd));
snprintf(verifycmd, sizeof(verifycmd)-1,
#ifdef KNET_LINUX
"ip addr show dev %s | grep -q %s/24", nozzle->nozzlename, testipv4_1);
#endif
#ifdef KNET_BSD
"ifconfig %s | grep -q %s", nozzle->nozzlename, testipv4_1);
#endif
err = _execute_shell(verifycmd, &error_string);
if (error_string) {
printf("Error string: %s\n", error_string);
free(error_string);
error_string = NULL;
}
if (!err) {
printf("Unable to verify IP address\n");
err=-1;
goto out_clean;
}
printf("Adding ip: %s/64\n", testipv6_1);
err = nozzle_add_ip(nozzle, testipv6_1, "64", &error_string);
if (error_string) {
printf("add ipv6 output: %s\n", error_string);
free(error_string);
error_string = NULL;
}
if (err < 0) {
printf("Unable to assign IP address\n");
err=-1;
goto out_clean;
}
memset(verifycmd, 0, sizeof(verifycmd));
snprintf(verifycmd, sizeof(verifycmd)-1,
#ifdef KNET_LINUX
"ip addr show dev %s | grep -q %s/64", nozzle->nozzlename, testipv6_1);
#endif
#ifdef KNET_BSD
"ifconfig %s | grep -q %s", nozzle->nozzlename, testipv6_1);
#endif
err = _execute_shell(verifycmd, &error_string);
if (error_string) {
printf("Error string: %s\n", error_string);
free(error_string);
error_string = NULL;
}
if (err) {
printf("Unable to verify IP address\n");
err=-1;
goto out_clean;
}
printf("Deleting ip: %s/64\n", testipv6_1);
err = nozzle_del_ip(nozzle, testipv6_1, "64", &error_string);
if (error_string) {
printf("Error string: %s\n", error_string);
free(error_string);
error_string = NULL;
}
if (err) {
printf("Unable to delete IP address\n");
err=-1;
goto out_clean;
}
memset(verifycmd, 0, sizeof(verifycmd));
snprintf(verifycmd, sizeof(verifycmd)-1,
#ifdef KNET_LINUX
"ip addr show dev %s | grep -q %s/64", nozzle->nozzlename, testipv6_1);
#endif
#ifdef KNET_BSD
"ifconfig %s | grep -q %s", nozzle->nozzlename, testipv6_1);
#endif
err = _execute_shell(verifycmd, &error_string);
if (error_string) {
printf("Error string: %s\n", error_string);
free(error_string);
error_string = NULL;
}
if (!err) {
printf("Unable to verify IP address\n");
err=-1;
goto out_clean;
}
out_clean:
nozzle_close(nozzle, &error_down, &error_postdown);
if (error_down) {
printf("down output: %s\n", error_down);
free(error_down);
error_down = NULL;
}
if (error_postdown) {
printf("postdown output: %s\n", error_down);
free(error_down);
error_down = NULL;
}
return err;
}
static void make_local_ips(void)
{
pid_t mypid;
uint8_t *pid;
uint8_t i;
if (sizeof(pid_t) < 4) {
printf("pid_t is smaller than 4 bytes?\n");
exit(77);
}
memset(testipv4_1, 0, sizeof(testipv4_1));
memset(testipv4_2, 0, sizeof(testipv4_2));
memset(testipv6_1, 0, sizeof(testipv6_1));
memset(testipv6_2, 0, sizeof(testipv6_2));
mypid = getpid();
pid = (uint8_t *)&mypid;
for (i = 0; i < sizeof(pid_t); i++) {
if (pid[i] == 0) {
pid[i] = 128;
}
}
randombyte = pid[1];
snprintf(testipv4_1,
sizeof(testipv4_1) - 1,
"127.%u.%u.%u",
pid[1],
pid[2],
pid[0]);
snprintf(testipv4_2,
sizeof(testipv4_2) - 1,
"127.%u.%d.%u",
pid[1],
pid[2]+1,
pid[0]);
snprintf(testipv6_1,
sizeof(testipv6_1) - 1,
"fd%x:%x%x::1",
pid[1],
pid[2],
pid[0]);
snprintf(testipv6_2,
sizeof(testipv6_2) - 1,
"fd%x:%x%x:1::1",
pid[1],
pid[2],
pid[0]);
}
int main(void)
{
if (geteuid() != 0) {
printf("This test requires root privileges\n");
exit(77);
}
make_local_ips();
if (check_nozzle_open_close() < 0)
return -1;
if (check_knet_multi_eth() < 0)
return -1;
if (check_knet_mtu() < 0)
return -1;
if (check_knet_mtu_ipv6() < 0)
return -1;
if (check_knet_mac() < 0)
return -1;
if (check_nozzle_execute_shell() < 0)
return -1;
if (check_knet_up_down() < 0)
return -1;
if (check_knet_set_del_ip() < 0)
return -1;
if (check_knet_close_leak() < 0)
return -1;
return 0;
}
#endif
diff --git a/libnozzle/libnozzle.h b/libnozzle/libnozzle.h
index 92c5d126..789e6ad5 100644
--- a/libnozzle/libnozzle.h
+++ b/libnozzle/libnozzle.h
@@ -1,321 +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
*
* ip_addr - 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 *ip_addr, 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
*
* ip_addr - 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 *ip_addr, 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 ip_addr_list struct!
*
* nozzle - pointer to the nozzle struct
*
* ip_addr_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.
* ip_addr_list is a malloc'ed buffer that the user needs to parse and free after use. ip_addr_list can
* be NULL if entries is 0.
*
*/
int nozzle_get_ips(const nozzle_t nozzle, char **ip_addr_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 fine a nozzle handle by device 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_get_name_by_handle
- * @brief fine a nozzle handle by device name
+ * @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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