patch-2.4.26 linux-2.4.26/Documentation/networking/ifenslave.c
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- Lines: 1438
- Date:
2004-04-14 06:05:25.000000000 -0700
- Orig file:
linux-2.4.25/Documentation/networking/ifenslave.c
- Orig date:
2003-11-28 10:26:19.000000000 -0800
diff -urN linux-2.4.25/Documentation/networking/ifenslave.c linux-2.4.26/Documentation/networking/ifenslave.c
@@ -4,8 +4,6 @@
* This program controls the Linux implementation of running multiple
* network interfaces in parallel.
*
- * Usage: ifenslave [-v] master-interface < slave-interface [metric <N>] > ...
- *
* Author: Donald Becker <becker@cesdis.gsfc.nasa.gov>
* Copyright 1994-1996 Donald Becker
*
@@ -90,24 +88,30 @@
* - For opt_c: slave should not be set to the master's setting
* while it is running. It was already set during enslave. To
* simplify things, it is now handeled separately.
+ *
+ * - 2003/12/01 - Shmulik Hen <shmulik.hen at intel dot com>
+ * - Code cleanup and style changes
+ * set version to 1.1.0
*/
-#define APP_VERSION "1.0.12"
-#define APP_RELDATE "June 30, 2003"
+#define APP_VERSION "1.1.0"
+#define APP_RELDATE "December 1, 2003"
#define APP_NAME "ifenslave"
static char *version =
-APP_NAME ".c:v" APP_VERSION " (" APP_RELDATE ") " "\nDonald Becker (becker@cesdis.gsfc.nasa.gov).\n"
-"detach support added on 2000/10/02 by Willy Tarreau (willy at meta-x.org).\n"
-"2.4 kernel support added on 2001/02/16 by Chad N. Tindel (ctindel at ieee dot org.\n";
+APP_NAME ".c:v" APP_VERSION " (" APP_RELDATE ")\n"
+"o Donald Becker (becker@cesdis.gsfc.nasa.gov).\n"
+"o Detach support added on 2000/10/02 by Willy Tarreau (willy at meta-x.org).\n"
+"o 2.4 kernel support added on 2001/02/16 by Chad N. Tindel\n"
+" (ctindel at ieee dot org).\n";
static const char *usage_msg =
-"Usage: ifenslave [-adfrvVh] <master-interface> < <slave-if> [metric <N>] > ...\n"
-" ifenslave -c master-interface slave-if\n";
+"Usage: ifenslave [-f] <master-if> <slave-if> [<slave-if>...]\n"
+" ifenslave -d <master-if> <slave-if> [<slave-if>...]\n"
+" ifenslave -c <master-if> <slave-if>\n"
+" ifenslave --help\n";
-static const char *howto_msg =
-"Usage: ifenslave [-adfrvVh] <master-interface> < <slave-if> [metric <N>] > ...\n"
-" ifenslave -c master-interface slave-if\n"
+static const char *help_msg =
"\n"
" To create a bond device, simply follow these three steps :\n"
" - ensure that the required drivers are properly loaded :\n"
@@ -115,18 +119,32 @@
" - assign an IP address to the bond device :\n"
" # ifconfig bond0 <addr> netmask <mask> broadcast <bcast>\n"
" - attach all the interfaces you need to the bond device :\n"
-" # ifenslave bond0 eth0 eth1 eth2\n"
+" # ifenslave [{-f|--force}] bond0 eth0 [eth1 [eth2]...]\n"
" If bond0 didn't have a MAC address, it will take eth0's. Then, all\n"
" interfaces attached AFTER this assignment will get the same MAC addr.\n"
-"\n"
-" To detach a dead interface without setting the bond device down :\n"
-" # ifenslave -d bond0 eth1\n"
+" (except for ALB/TLB modes)\n"
"\n"
" To set the bond device down and automatically release all the slaves :\n"
" # ifconfig bond0 down\n"
"\n"
+" To detach a dead interface without setting the bond device down :\n"
+" # ifenslave {-d|--detach} bond0 eth0 [eth1 [eth2]...]\n"
+"\n"
" To change active slave :\n"
-" # ifenslave -c bond0 eth0\n"
+" # ifenslave {-c|--change-active} bond0 eth0\n"
+"\n"
+" To show master interface info\n"
+" # ifenslave bond0\n"
+"\n"
+" To show all interfaces info\n"
+" # ifenslave {-a|--all-interfaces}\n"
+"\n"
+" To be more verbose\n"
+" # ifenslave {-v|--verbose} ...\n"
+"\n"
+" # ifenslave {-u|--usage} Show usage\n"
+" # ifenslave {-V|--version} Show version\n"
+" # ifenslave {-h|--help} This message\n"
"\n";
#include <unistd.h>
@@ -153,476 +171,332 @@
#include <linux/ethtool.h>
struct option longopts[] = {
- /* { name has_arg *flag val } */
- {"all-interfaces", 0, 0, 'a'}, /* Show all interfaces. */
- {"force", 0, 0, 'f'}, /* Force the operation. */
- {"help", 0, 0, '?'}, /* Give help */
- {"howto", 0, 0, 'h'}, /* Give some more help */
- {"receive-slave", 0, 0, 'r'}, /* Make a receive-only slave. */
- {"verbose", 0, 0, 'v'}, /* Report each action taken. */
- {"version", 0, 0, 'V'}, /* Emit version information. */
- {"detach", 0, 0, 'd'}, /* Detach a slave interface. */
- {"change-active", 0, 0, 'c'}, /* Change the active slave. */
- { 0, 0, 0, 0 }
+ /* { name has_arg *flag val } */
+ {"all-interfaces", 0, 0, 'a'}, /* Show all interfaces. */
+ {"change-active", 0, 0, 'c'}, /* Change the active slave. */
+ {"detach", 0, 0, 'd'}, /* Detach a slave interface. */
+ {"force", 0, 0, 'f'}, /* Force the operation. */
+ {"help", 0, 0, 'h'}, /* Give help */
+ {"usage", 0, 0, 'u'}, /* Give usage */
+ {"verbose", 0, 0, 'v'}, /* Report each action taken. */
+ {"version", 0, 0, 'V'}, /* Emit version information. */
+ { 0, 0, 0, 0}
};
/* Command-line flags. */
unsigned int
-opt_a = 0, /* Show-all-interfaces flag. */
-opt_f = 0, /* Force the operation. */
-opt_r = 0, /* Set up a Rx-only slave. */
-opt_d = 0, /* detach a slave interface. */
-opt_c = 0, /* change-active-slave flag. */
-verbose = 0, /* Verbose flag. */
-opt_version = 0,
-opt_howto = 0;
-int skfd = -1; /* AF_INET socket for ioctl() calls. */
+opt_a = 0, /* Show-all-interfaces flag. */
+opt_c = 0, /* Change-active-slave flag. */
+opt_d = 0, /* Detach a slave interface. */
+opt_f = 0, /* Force the operation. */
+opt_h = 0, /* Help */
+opt_u = 0, /* Usage */
+opt_v = 0, /* Verbose flag. */
+opt_V = 0; /* Version */
+
+int skfd = -1; /* AF_INET socket for ioctl() calls.*/
+int abi_ver = 0; /* userland - kernel ABI version */
+int hwaddr_set = 0; /* Master's hwaddr is set */
+int saved_errno;
+
+struct ifreq master_mtu, master_flags, master_hwaddr;
+struct ifreq slave_mtu, slave_flags, slave_hwaddr;
+
+struct dev_ifr {
+ struct ifreq *req_ifr;
+ char *req_name;
+ int req_type;
+};
+
+struct dev_ifr master_ifra[] = {
+ {&master_mtu, "SIOCGIFMTU", SIOCGIFMTU},
+ {&master_flags, "SIOCGIFFLAGS", SIOCGIFFLAGS},
+ {&master_hwaddr, "SIOCGIFHWADDR", SIOCGIFHWADDR},
+ {NULL, "", 0}
+};
+
+struct dev_ifr slave_ifra[] = {
+ {&slave_mtu, "SIOCGIFMTU", SIOCGIFMTU},
+ {&slave_flags, "SIOCGIFFLAGS", SIOCGIFFLAGS},
+ {&slave_hwaddr, "SIOCGIFHWADDR", SIOCGIFHWADDR},
+ {NULL, "", 0}
+};
static void if_print(char *ifname);
-static int get_abi_ver(char *master_ifname);
+static int get_drv_info(char *master_ifname);
+static int get_if_settings(char *ifname, struct dev_ifr ifra[]);
+static int get_slave_flags(char *slave_ifname);
+static int set_master_hwaddr(char *master_ifname, struct sockaddr *hwaddr);
+static int set_slave_hwaddr(char *slave_ifname, struct sockaddr *hwaddr);
+static int set_slave_mtu(char *slave_ifname, int mtu);
+static int set_if_flags(char *ifname, short flags);
+static int set_if_up(char *ifname, short flags);
+static int set_if_down(char *ifname, short flags);
+static int clear_if_addr(char *ifname);
+static int set_if_addr(char *master_ifname, char *slave_ifname);
+static int change_active(char *master_ifname, char *slave_ifname);
+static int enslave(char *master_ifname, char *slave_ifname);
+static int release(char *master_ifname, char *slave_ifname);
+#define v_print(fmt, args...) \
+ if (opt_v) \
+ fprintf(stderr, fmt, ## args )
-int
-main(int argc, char **argv)
+int main(int argc, char *argv[])
{
- struct ifreq ifr2, if_hwaddr, if_ipaddr, if_metric, if_mtu, if_dstaddr;
- struct ifreq if_netmask, if_brdaddr, if_flags;
- int rv, goterr = 0;
- int c, errflag = 0;
- sa_family_t master_family;
char **spp, *master_ifname, *slave_ifname;
- int hwaddr_notset;
- int abi_ver = 0;
+ int c, i, rv;
+ int res = 0;
+ int exclusive = 0;
- while ((c = getopt_long(argc, argv, "acdfrvV?h", longopts, 0)) != EOF)
+ while ((c = getopt_long(argc, argv, "acdfhuvV", longopts, 0)) != EOF) {
switch (c) {
- case 'a': opt_a++; break;
- case 'f': opt_f++; break;
- case 'r': opt_r++; break;
- case 'd': opt_d++; break;
- case 'c': opt_c++; break;
- case 'v': verbose++; break;
- case 'V': opt_version++; break;
- case 'h': opt_howto++; break;
- case '?': errflag++;
- }
+ case 'a': opt_a++; exclusive++; break;
+ case 'c': opt_c++; exclusive++; break;
+ case 'd': opt_d++; exclusive++; break;
+ case 'f': opt_f++; exclusive++; break;
+ case 'h': opt_h++; exclusive++; break;
+ case 'u': opt_u++; exclusive++; break;
+ case 'v': opt_v++; break;
+ case 'V': opt_V++; exclusive++; break;
- /* option check */
- if (opt_c)
- if(opt_a || opt_f || opt_r || opt_d || verbose || opt_version ||
- opt_howto || errflag ) {
+ case '?':
fprintf(stderr, usage_msg);
- return 2;
+ res = 2;
+ goto out;
}
+ }
- if (errflag) {
+ /* options check */
+ if (exclusive > 1) {
fprintf(stderr, usage_msg);
- return 2;
+ res = 2;
+ goto out;
}
- if (opt_howto) {
- fprintf(stderr, howto_msg);
- return 0;
+ if (opt_v || opt_V) {
+ printf(version);
+ if (opt_V) {
+ res = 0;
+ goto out;
+ }
}
- if (verbose || opt_version) {
- printf(version);
- if (opt_version)
- exit(0);
+ if (opt_u) {
+ printf(usage_msg);
+ res = 0;
+ goto out;
}
- /* Open a basic socket. */
- if ((skfd = socket(AF_INET, SOCK_DGRAM,0)) < 0) {
- perror("socket");
- exit(-1);
+ if (opt_h) {
+ printf(usage_msg);
+ printf(help_msg);
+ res = 0;
+ goto out;
}
- if (verbose)
- fprintf(stderr, "DEBUG: argc=%d, optind=%d and argv[optind] is %s.\n",
- argc, optind, argv[optind]);
+ /* Open a basic socket */
+ if ((skfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
+ perror("socket");
+ res = 1;
+ goto out;
+ }
- /* No remaining args means show all interfaces. */
- if (optind == argc) {
- if_print((char *)NULL);
- (void) close(skfd);
- exit(0);
+ if (opt_a) {
+ if (optind == argc) {
+ /* No remaining args */
+ /* show all interfaces */
+ if_print((char *)NULL);
+ goto out;
+ } else {
+ /* Just show usage */
+ fprintf(stderr, usage_msg);
+ res = 2;
+ goto out;
+ }
}
- /* Copy the interface name. */
+ /* Copy the interface name */
spp = argv + optind;
master_ifname = *spp++;
- slave_ifname = *spp++;
- /* Check command line. */
- if (opt_c) {
- char **tempp = spp;
- if ((master_ifname == NULL)||(slave_ifname == NULL)||(*tempp++ != NULL)) {
- fprintf(stderr, usage_msg);
- (void) close(skfd);
- return 2;
- }
+ if (master_ifname == NULL) {
+ fprintf(stderr, usage_msg);
+ res = 2;
+ goto out;
}
- /* A single args means show the configuration for this interface. */
- if (slave_ifname == NULL) {
- if_print(master_ifname);
- (void) close(skfd);
- exit(0);
+ /* exchange abi version with bonding module */
+ res = get_drv_info(master_ifname);
+ if (res) {
+ fprintf(stderr,
+ "Master '%s': Error: handshake with driver failed. "
+ "Aborting\n",
+ master_ifname);
+ goto out;
}
- /* exchange abi version with bonding driver */
- abi_ver = get_abi_ver(master_ifname);
- if (abi_ver < 0) {
- (void) close(skfd);
- exit(1);
- }
-
- /* Get the vitals from the master interface. */
- {
- struct ifreq *ifra[7] = { &if_ipaddr, &if_mtu, &if_dstaddr,
- &if_brdaddr, &if_netmask, &if_flags,
- &if_hwaddr };
- const char *req_name[7] = {
- "IP address", "MTU", "destination address",
- "broadcast address", "netmask", "status flags",
- "hardware address" };
- const int ioctl_req_type[7] = {
- SIOCGIFADDR, SIOCGIFMTU, SIOCGIFDSTADDR,
- SIOCGIFBRDADDR, SIOCGIFNETMASK, SIOCGIFFLAGS,
- SIOCGIFHWADDR };
- int i;
-
- for (i = 0; i < 7; i++) {
- strncpy(ifra[i]->ifr_name, master_ifname, IFNAMSIZ);
- if (ioctl(skfd, ioctl_req_type[i], ifra[i]) < 0) {
- fprintf(stderr,
- "Something broke getting the master's %s: %s.\n",
- req_name[i], strerror(errno));
- }
- }
-
- /* check if master is up; if not then fail any operation */
- if (!(if_flags.ifr_flags & IFF_UP)) {
- fprintf(stderr, "Illegal operation; the specified master interface '%s' is not up.\n", master_ifname);
- (void) close(skfd);
- exit (1);
- }
+ slave_ifname = *spp++;
- hwaddr_notset = 1; /* assume master's address not set yet */
- for (i = 0; hwaddr_notset && (i < 6); i++) {
- hwaddr_notset &= ((unsigned char *)if_hwaddr.ifr_hwaddr.sa_data)[i] == 0;
+ if (slave_ifname == NULL) {
+ if (opt_d || opt_c) {
+ fprintf(stderr, usage_msg);
+ res = 2;
+ goto out;
}
- /* The family '1' is ARPHRD_ETHER for ethernet. */
- if (if_hwaddr.ifr_hwaddr.sa_family != 1 && !opt_f) {
- fprintf(stderr, "The specified master interface '%s' is not"
- " ethernet-like.\n This program is designed to work"
- " with ethernet-like network interfaces.\n"
- " Use the '-f' option to force the operation.\n",
- master_ifname);
- (void) close(skfd);
- exit (1);
- }
- master_family = if_hwaddr.ifr_hwaddr.sa_family;
- if (verbose) {
- unsigned char *hwaddr = (unsigned char *)if_hwaddr.ifr_hwaddr.sa_data;
- printf("The current hardware address (SIOCGIFHWADDR) of %s is type %d "
- "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x.\n", master_ifname,
- if_hwaddr.ifr_hwaddr.sa_family, hwaddr[0], hwaddr[1],
- hwaddr[2], hwaddr[3], hwaddr[4], hwaddr[5]);
- }
+ /* A single arg means show the
+ * configuration for this interface
+ */
+ if_print(master_ifname);
+ goto out;
}
+ res = get_if_settings(master_ifname, master_ifra);
+ if (res) {
+ /* Probably a good reason not to go on */
+ fprintf(stderr,
+ "Master '%s': Error: get settings failed: %s. "
+ "Aborting\n",
+ master_ifname, strerror(res));
+ goto out;
+ }
- /* do this when enslaving interfaces */
- do {
- if (opt_d) { /* detach a slave interface from the master */
- strncpy(if_flags.ifr_name, master_ifname, IFNAMSIZ);
- strncpy(if_flags.ifr_slave, slave_ifname, IFNAMSIZ);
- if ((ioctl(skfd, SIOCBONDRELEASE, &if_flags) < 0) &&
- (ioctl(skfd, BOND_RELEASE_OLD, &if_flags) < 0)) {
- fprintf(stderr, "SIOCBONDRELEASE: cannot detach %s from %s. errno=%s.\n",
- slave_ifname, master_ifname, strerror(errno));
- }
- else if (abi_ver < 1) {
- /* The driver is using an old ABI, so we'll set the interface
- * down to avoid any conflicts due to same IP/MAC
- */
- strncpy(ifr2.ifr_name, slave_ifname, IFNAMSIZ);
- if (ioctl(skfd, SIOCGIFFLAGS, &ifr2) < 0) {
- int saved_errno = errno;
- fprintf(stderr, "SIOCGIFFLAGS on %s failed: %s\n", slave_ifname,
- strerror(saved_errno));
- }
- else {
- ifr2.ifr_flags &= ~(IFF_UP | IFF_RUNNING);
- if (ioctl(skfd, SIOCSIFFLAGS, &ifr2) < 0) {
- int saved_errno = errno;
- fprintf(stderr, "Shutting down interface %s failed: %s\n",
- slave_ifname, strerror(saved_errno));
- }
- }
- }
- } else if (opt_c) { /* change primary slave */
- strncpy(if_flags.ifr_name, master_ifname, IFNAMSIZ);
- strncpy(if_flags.ifr_slave, slave_ifname, IFNAMSIZ);
- if ((ioctl(skfd, SIOCBONDCHANGEACTIVE, &if_flags) < 0) &&
- (ioctl(skfd, BOND_CHANGE_ACTIVE_OLD, &if_flags) < 0)) {
- fprintf(stderr, "SIOCBONDCHANGEACTIVE: %s.\n", strerror(errno));
- }
- } else { /* attach a slave interface to the master */
-
- strncpy(ifr2.ifr_name, slave_ifname, IFNAMSIZ);
- if (ioctl(skfd, SIOCGIFFLAGS, &ifr2) < 0) {
- int saved_errno = errno;
- fprintf(stderr, "SIOCGIFFLAGS on %s failed: %s\n", slave_ifname,
- strerror(saved_errno));
- (void) close(skfd);
- return 1;
- }
-
- if ((ifr2.ifr_flags & IFF_SLAVE) && !opt_r) {
- fprintf(stderr, "%s is already a slave\n", slave_ifname);
- (void) close(skfd);
- return 1;
- }
-
- /* if hwaddr_notset, assign the slave hw address to the master */
- if (hwaddr_notset) {
- /* assign the slave hw address to the
- * master since it currently does not
- * have one; otherwise, slaves may
- * have different hw addresses in
- * active-backup mode as seen when enslaving
- * using "ifenslave bond0 eth0 eth1" because
- * hwaddr_notset is set outside this loop.
- * TODO: put this and the "else" portion in
- * a function.
- */
- /* get the slaves MAC address */
- strncpy(if_hwaddr.ifr_name, slave_ifname,
- IFNAMSIZ);
- rv = ioctl(skfd, SIOCGIFHWADDR, &if_hwaddr);
- if (-1 == rv) {
- fprintf(stderr, "Could not get MAC "
- "address of %s: %s\n",
- slave_ifname,
- strerror(errno));
- strncpy(if_hwaddr.ifr_name,
- master_ifname, IFNAMSIZ);
- goterr = 1;
- }
-
- if (!goterr) {
- if (abi_ver < 1) {
- /* In ABI versions older than 1, the
- * master's set_mac routine couldn't
- * work if it was up, because it
- * used the default ethernet set_mac
- * function.
- */
- /* bring master down */
- if_flags.ifr_flags &= ~IFF_UP;
- if (ioctl(skfd, SIOCSIFFLAGS,
- &if_flags) < 0) {
- goterr = 1;
- fprintf(stderr,
- "Shutting down "
- "interface %s failed: "
- "%s\n",
- master_ifname,
- strerror(errno));
- }
- }
-
- strncpy(if_hwaddr.ifr_name,
- master_ifname, IFNAMSIZ);
- if (ioctl(skfd, SIOCSIFHWADDR,
- &if_hwaddr) < 0) {
- fprintf(stderr,
- "Could not set MAC "
- "address of %s: %s\n",
- master_ifname,
- strerror(errno));
- goterr=1;
- } else {
- hwaddr_notset = 0;
- }
-
- if (abi_ver < 1) {
- /* bring master back up */
- if_flags.ifr_flags |= IFF_UP;
- if (ioctl(skfd, SIOCSIFFLAGS,
- &if_flags) < 0) {
- fprintf(stderr,
- "Bringing up interface "
- "%s failed: %s\n",
- master_ifname,
- strerror(errno));
- }
- }
- }
- } else if (abi_ver < 1) { /* if (hwaddr_notset) */
-
- /* The driver is using an old ABI, so we'll set the interface
- * down and assign the master's hwaddr to it
- */
- if (ifr2.ifr_flags & IFF_UP) {
- ifr2.ifr_flags &= ~IFF_UP;
- if (ioctl(skfd, SIOCSIFFLAGS, &ifr2) < 0) {
- int saved_errno = errno;
- fprintf(stderr, "Shutting down interface %s failed: %s\n",
- slave_ifname, strerror(saved_errno));
- }
- }
-
- strncpy(if_hwaddr.ifr_name, slave_ifname, IFNAMSIZ);
- if (ioctl(skfd, SIOCSIFHWADDR, &if_hwaddr) < 0) {
- int saved_errno = errno;
- fprintf(stderr, "SIOCSIFHWADDR on %s failed: %s\n", if_hwaddr.ifr_name,
- strerror(saved_errno));
- if (saved_errno == EBUSY)
- fprintf(stderr, " The slave device %s is busy: it must be"
- " idle before running this command.\n", slave_ifname);
- else if (saved_errno == EOPNOTSUPP)
- fprintf(stderr, " The slave device you specified does not support"
- " setting the MAC address.\n Your kernel likely does not"
- " support slave devices.\n");
- else if (saved_errno == EINVAL)
- fprintf(stderr, " The slave device's address type does not match"
- " the master's address type.\n");
- } else {
- if (verbose) {
- unsigned char *hwaddr = if_hwaddr.ifr_hwaddr.sa_data;
- printf("Slave's (%s) hardware address set to "
- "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x.\n", slave_ifname,
- hwaddr[0], hwaddr[1], hwaddr[2], hwaddr[3], hwaddr[4], hwaddr[5]);
- }
- }
- }
+ /* check if master is indeed a master;
+ * if not then fail any operation
+ */
+ if (!(master_flags.ifr_flags & IFF_MASTER)) {
+ fprintf(stderr,
+ "Illegal operation; the specified interface '%s' "
+ "is not a master. Aborting\n",
+ master_ifname);
+ res = 1;
+ goto out;
+ }
- if (*spp && !strcmp(*spp, "metric")) {
- if (*++spp == NULL) {
- fprintf(stderr, usage_msg);
- (void) close(skfd);
- exit(2);
- }
- if_metric.ifr_metric = atoi(*spp);
- strncpy(if_metric.ifr_name, slave_ifname, IFNAMSIZ);
- if (ioctl(skfd, SIOCSIFMETRIC, &if_metric) < 0) {
- fprintf(stderr, "SIOCSIFMETRIC on %s: %s\n", slave_ifname,
- strerror(errno));
- goterr = 1;
- }
- spp++;
- }
+ /* check if master is up; if not then fail any operation */
+ if (!(master_flags.ifr_flags & IFF_UP)) {
+ fprintf(stderr,
+ "Illegal operation; the specified master interface "
+ "'%s' is not up.\n",
+ master_ifname);
+ res = 1;
+ goto out;
+ }
- if (strncpy(if_ipaddr.ifr_name, slave_ifname, IFNAMSIZ) <= 0
- || ioctl(skfd, SIOCSIFADDR, &if_ipaddr) < 0) {
- fprintf(stderr,
- "Something broke setting the slave's address: %s.\n",
- strerror(errno));
- } else {
- if (verbose) {
- unsigned char *ipaddr = if_ipaddr.ifr_addr.sa_data;
- printf("Set the slave's (%s) IP address to %d.%d.%d.%d.\n",
- slave_ifname, ipaddr[0], ipaddr[1], ipaddr[2], ipaddr[3]);
- }
- }
+ /* Only for enslaving */
+ if (!opt_c && !opt_d) {
+ sa_family_t master_family = master_hwaddr.ifr_hwaddr.sa_family;
+ unsigned char *hwaddr =
+ (unsigned char *)master_hwaddr.ifr_hwaddr.sa_data;
- if (strncpy(if_mtu.ifr_name, slave_ifname, IFNAMSIZ) <= 0
- || ioctl(skfd, SIOCSIFMTU, &if_mtu) < 0) {
- fprintf(stderr, "Something broke setting the slave MTU: %s.\n",
- strerror(errno));
- } else {
- if (verbose)
- printf("Set the slave's (%s) MTU to %d.\n", slave_ifname, if_mtu.ifr_mtu);
- }
+ /* The family '1' is ARPHRD_ETHER for ethernet. */
+ if (master_family != 1 && !opt_f) {
+ fprintf(stderr,
+ "Illegal operation: The specified master "
+ "interface '%s' is not ethernet-like.\n "
+ "This program is designed to work with "
+ "ethernet-like network interfaces.\n "
+ "Use the '-f' option to force the "
+ "operation.\n",
+ master_ifname);
+ res = 1;
+ goto out;
+ }
- if (strncpy(if_dstaddr.ifr_name, slave_ifname, IFNAMSIZ) <= 0
- || ioctl(skfd, SIOCSIFDSTADDR, &if_dstaddr) < 0) {
- fprintf(stderr, "Error setting the slave (%s) with SIOCSIFDSTADDR: %s.\n",
- slave_ifname, strerror(errno));
- } else {
- if (verbose) {
- unsigned char *ipaddr = if_dstaddr.ifr_dstaddr.sa_data;
- printf("Set the slave's (%s) destination address to %d.%d.%d.%d.\n",
- slave_ifname, ipaddr[0], ipaddr[1], ipaddr[2], ipaddr[3]);
- }
+ /* Check master's hw addr */
+ for (i = 0; i < 6; i++) {
+ if (hwaddr[i] != 0) {
+ hwaddr_set = 1;
+ break;
}
+ }
- if (strncpy(if_brdaddr.ifr_name, slave_ifname, IFNAMSIZ) <= 0
- || ioctl(skfd, SIOCSIFBRDADDR, &if_brdaddr) < 0) {
- fprintf(stderr,
- "Something broke setting the slave (%s) broadcast address: %s.\n",
- slave_ifname, strerror(errno));
- } else {
- if (verbose) {
- unsigned char *ipaddr = if_brdaddr.ifr_broadaddr.sa_data;
- printf("Set the slave's (%s) broadcast address to %d.%d.%d.%d.\n",
- slave_ifname, ipaddr[0], ipaddr[1], ipaddr[2], ipaddr[3]);
- }
- }
+ if (hwaddr_set) {
+ v_print("current hardware address of master '%s' "
+ "is %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x, "
+ "type %d\n",
+ master_ifname,
+ hwaddr[0], hwaddr[1],
+ hwaddr[2], hwaddr[3],
+ hwaddr[4], hwaddr[5],
+ master_family);
+ }
+ }
- if (strncpy(if_netmask.ifr_name, slave_ifname, IFNAMSIZ) <= 0
- || ioctl(skfd, SIOCSIFNETMASK, &if_netmask) < 0) {
- fprintf(stderr,
- "Something broke setting the slave (%s) netmask: %s.\n",
- slave_ifname, strerror(errno));
- } else {
- if (verbose) {
- unsigned char *ipaddr = if_netmask.ifr_netmask.sa_data;
- printf("Set the slave's (%s) netmask to %d.%d.%d.%d.\n",
- slave_ifname, ipaddr[0], ipaddr[1], ipaddr[2], ipaddr[3]);
+ /* Accepts only one slave */
+ if (opt_c) {
+ /* change active slave */
+ res = get_slave_flags(slave_ifname);
+ if (res) {
+ fprintf(stderr,
+ "Slave '%s': Error: get flags failed. "
+ "Aborting\n",
+ slave_ifname);
+ goto out;
+ }
+ res = change_active(master_ifname, slave_ifname);
+ if (res) {
+ fprintf(stderr,
+ "Master '%s', Slave '%s': Error: "
+ "Change active failed\n",
+ master_ifname, slave_ifname);
+ }
+ } else {
+ /* Accept multiple slaves */
+ do {
+ if (opt_d) {
+ /* detach a slave interface from the master */
+ rv = get_slave_flags(slave_ifname);
+ if (rv) {
+ /* Can't work with this slave. */
+ /* remember the error and skip it*/
+ fprintf(stderr,
+ "Slave '%s': Error: get flags "
+ "failed. Skipping\n",
+ slave_ifname);
+ res = rv;
+ continue;
}
- }
-
- if (abi_ver < 1) {
-
- /* The driver is using an old ABI, so we'll set the interface
- * up before enslaving it
- */
- ifr2.ifr_flags |= IFF_UP;
- if ((ifr2.ifr_flags &= ~(IFF_SLAVE | IFF_MASTER)) == 0
- || strncpy(ifr2.ifr_name, slave_ifname, IFNAMSIZ) <= 0
- || ioctl(skfd, SIOCSIFFLAGS, &ifr2) < 0) {
- fprintf(stderr,
- "Something broke setting the slave (%s) flags: %s.\n",
- slave_ifname, strerror(errno));
- } else {
- if (verbose)
- printf("Set the slave's (%s) flags %4.4x.\n",
- slave_ifname, if_flags.ifr_flags);
+ rv = release(master_ifname, slave_ifname);
+ if (rv) {
+ fprintf(stderr,
+ "Master '%s', Slave '%s': Error: "
+ "Release failed\n",
+ master_ifname, slave_ifname);
+ res = rv;
}
} else {
- /* the bonding module takes care of setting the slave's mac address
- * and opening its interface
- */
- if (ifr2.ifr_flags & IFF_UP) { /* the interface will need to be down */
- ifr2.ifr_flags &= ~IFF_UP;
- if (ioctl(skfd, SIOCSIFFLAGS, &ifr2) < 0) {
- int saved_errno = errno;
- fprintf(stderr, "Shutting down interface %s failed: %s\n",
- slave_ifname, strerror(saved_errno));
- }
+ /* attach a slave interface to the master */
+ rv = get_if_settings(slave_ifname, slave_ifra);
+ if (rv) {
+ /* Can't work with this slave. */
+ /* remember the error and skip it*/
+ fprintf(stderr,
+ "Slave '%s': Error: get "
+ "settings failed: %s. "
+ "Skipping\n",
+ slave_ifname, strerror(rv));
+ res = rv;
+ continue;
}
- }
-
- /* Do the real thing */
- if (!opt_r) {
- strncpy(if_flags.ifr_name, master_ifname, IFNAMSIZ);
- strncpy(if_flags.ifr_slave, slave_ifname, IFNAMSIZ);
- if ((ioctl(skfd, SIOCBONDENSLAVE, &if_flags) < 0) &&
- (ioctl(skfd, BOND_ENSLAVE_OLD, &if_flags) < 0)) {
- fprintf(stderr, "SIOCBONDENSLAVE: %s.\n", strerror(errno));
+ rv = enslave(master_ifname, slave_ifname);
+ if (rv) {
+ fprintf(stderr,
+ "Master '%s', Slave '%s': Error: "
+ "Enslave failed\n",
+ master_ifname, slave_ifname);
+ res = rv;
}
}
- }
- } while ( (slave_ifname = *spp++) != NULL);
+ } while ((slave_ifname = *spp++) != NULL);
+ }
- /* Close the socket. */
- (void) close(skfd);
+out:
+ if (skfd >= 0) {
+ close(skfd);
+ }
- return(goterr);
+ return res;
}
static short mif_flags;
@@ -631,35 +505,34 @@
static int if_getconfig(char *ifname)
{
struct ifreq ifr;
- int metric, mtu; /* Parameters of the master interface. */
+ int metric, mtu; /* Parameters of the master interface. */
struct sockaddr dstaddr, broadaddr, netmask;
+ unsigned char *hwaddr;
strcpy(ifr.ifr_name, ifname);
if (ioctl(skfd, SIOCGIFFLAGS, &ifr) < 0)
return -1;
mif_flags = ifr.ifr_flags;
printf("The result of SIOCGIFFLAGS on %s is %x.\n",
- ifname, ifr.ifr_flags);
+ ifname, ifr.ifr_flags);
strcpy(ifr.ifr_name, ifname);
if (ioctl(skfd, SIOCGIFADDR, &ifr) < 0)
return -1;
printf("The result of SIOCGIFADDR is %2.2x.%2.2x.%2.2x.%2.2x.\n",
- ifr.ifr_addr.sa_data[0], ifr.ifr_addr.sa_data[1],
- ifr.ifr_addr.sa_data[2], ifr.ifr_addr.sa_data[3]);
+ ifr.ifr_addr.sa_data[0], ifr.ifr_addr.sa_data[1],
+ ifr.ifr_addr.sa_data[2], ifr.ifr_addr.sa_data[3]);
strcpy(ifr.ifr_name, ifname);
if (ioctl(skfd, SIOCGIFHWADDR, &ifr) < 0)
return -1;
- {
- /* Gotta convert from 'char' to unsigned for printf(). */
- unsigned char *hwaddr = (unsigned char *)ifr.ifr_hwaddr.sa_data;
- printf("The result of SIOCGIFHWADDR is type %d "
- "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x.\n",
- ifr.ifr_hwaddr.sa_family, hwaddr[0], hwaddr[1],
- hwaddr[2], hwaddr[3], hwaddr[4], hwaddr[5]);
- }
+ /* Gotta convert from 'char' to unsigned for printf(). */
+ hwaddr = (unsigned char *)ifr.ifr_hwaddr.sa_data;
+ printf("The result of SIOCGIFHWADDR is type %d "
+ "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x.\n",
+ ifr.ifr_hwaddr.sa_family, hwaddr[0], hwaddr[1],
+ hwaddr[2], hwaddr[3], hwaddr[4], hwaddr[5]);
strcpy(ifr.ifr_name, ifname);
if (ioctl(skfd, SIOCGIFMETRIC, &ifr) < 0) {
@@ -691,7 +564,7 @@
} else
netmask = ifr.ifr_netmask;
- return(0);
+ return 0;
}
static void if_print(char *ifname)
@@ -705,15 +578,16 @@
ifc.ifc_len = sizeof(buff);
ifc.ifc_buf = buff;
if (ioctl(skfd, SIOCGIFCONF, &ifc) < 0) {
- fprintf(stderr, "SIOCGIFCONF: %s\n", strerror(errno));
+ perror("SIOCGIFCONF failed");
return;
}
ifr = ifc.ifc_req;
for (i = ifc.ifc_len / sizeof(struct ifreq); --i >= 0; ifr++) {
if (if_getconfig(ifr->ifr_name) < 0) {
- fprintf(stderr, "%s: unknown interface.\n",
- ifr->ifr_name);
+ fprintf(stderr,
+ "%s: unknown interface.\n",
+ ifr->ifr_name);
continue;
}
@@ -721,16 +595,18 @@
/*ife_print(&ife);*/
}
} else {
- if (if_getconfig(ifname) < 0)
- fprintf(stderr, "%s: unknown interface.\n", ifname);
+ if (if_getconfig(ifname) < 0) {
+ fprintf(stderr,
+ "%s: unknown interface.\n", ifname);
+ }
}
}
-static int get_abi_ver(char *master_ifname)
+static int get_drv_info(char *master_ifname)
{
struct ifreq ifr;
struct ethtool_drvinfo info;
- int abi_ver = 0;
+ char *endptr;
memset(&ifr, 0, sizeof(ifr));
strncpy(ifr.ifr_name, master_ifname, IFNAMSIZ);
@@ -739,24 +615,487 @@
info.cmd = ETHTOOL_GDRVINFO;
strncpy(info.driver, "ifenslave", 32);
snprintf(info.fw_version, 32, "%d", BOND_ABI_VERSION);
- if (ioctl(skfd, SIOCETHTOOL, &ifr) >= 0) {
- char *endptr;
- abi_ver = strtoul(info.fw_version, &endptr, 0);
- if (*endptr) {
- fprintf(stderr, "Error: got invalid string as an ABI "
- "version from the bonding module\n");
- return -1;
+ if (ioctl(skfd, SIOCETHTOOL, &ifr) < 0) {
+ if (errno == EOPNOTSUPP) {
+ goto out;
}
+
+ saved_errno = errno;
+ v_print("Master '%s': Error: get bonding info failed %s\n",
+ master_ifname, strerror(saved_errno));
+ return 1;
}
- if (verbose) {
- printf("ABI ver is %d\n", abi_ver);
+ abi_ver = strtoul(info.fw_version, &endptr, 0);
+ if (*endptr) {
+ v_print("Master '%s': Error: got invalid string as an ABI "
+ "version from the bonding module\n",
+ master_ifname);
+ return 1;
}
- return abi_ver;
+
+out:
+ v_print("ABI ver is %d\n", abi_ver);
+
+ return 0;
}
+static int change_active(char *master_ifname, char *slave_ifname)
+{
+ struct ifreq ifr;
+ int res = 0;
+ if (!(slave_flags.ifr_flags & IFF_SLAVE)) {
+ fprintf(stderr,
+ "Illegal operation: The specified slave interface "
+ "'%s' is not a slave\n",
+ slave_ifname);
+ return 1;
+ }
+
+ strncpy(ifr.ifr_name, master_ifname, IFNAMSIZ);
+ strncpy(ifr.ifr_slave, slave_ifname, IFNAMSIZ);
+ if ((ioctl(skfd, SIOCBONDCHANGEACTIVE, &ifr) < 0) &&
+ (ioctl(skfd, BOND_CHANGE_ACTIVE_OLD, &ifr) < 0)) {
+ saved_errno = errno;
+ v_print("Master '%s': Error: SIOCBONDCHANGEACTIVE failed: "
+ "%s\n",
+ master_ifname, strerror(saved_errno));
+ res = 1;
+ }
+
+ return res;
+}
+
+static int enslave(char *master_ifname, char *slave_ifname)
+{
+ struct ifreq ifr;
+ int res = 0;
+
+ if (slave_flags.ifr_flags & IFF_SLAVE) {
+ fprintf(stderr,
+ "Illegal operation: The specified slave interface "
+ "'%s' is already a slave\n",
+ slave_ifname);
+ return 1;
+ }
+
+ res = set_if_down(slave_ifname, slave_flags.ifr_flags);
+ if (res) {
+ fprintf(stderr,
+ "Slave '%s': Error: bring interface down failed\n",
+ slave_ifname);
+ return res;
+ }
+
+ if (abi_ver < 2) {
+ /* Older bonding versions would panic if the slave has no IP
+ * address, so get the IP setting from the master.
+ */
+ res = set_if_addr(master_ifname, slave_ifname);
+ if (res) {
+ fprintf(stderr,
+ "Slave '%s': Error: set address failed\n",
+ slave_ifname);
+ return res;
+ }
+ } else {
+ res = clear_if_addr(slave_ifname);
+ if (res) {
+ fprintf(stderr,
+ "Slave '%s': Error: clear address failed\n",
+ slave_ifname);
+ return res;
+ }
+ }
+
+ if (master_mtu.ifr_mtu != slave_mtu.ifr_mtu) {
+ res = set_slave_mtu(slave_ifname, master_mtu.ifr_mtu);
+ if (res) {
+ fprintf(stderr,
+ "Slave '%s': Error: set MTU failed\n",
+ slave_ifname);
+ return res;
+ }
+ }
+
+ if (hwaddr_set) {
+ /* Master already has an hwaddr
+ * so set it's hwaddr to the slave
+ */
+ if (abi_ver < 1) {
+ /* The driver is using an old ABI, so
+ * the application sets the slave's
+ * hwaddr
+ */
+ res = set_slave_hwaddr(slave_ifname,
+ &(master_hwaddr.ifr_hwaddr));
+ if (res) {
+ fprintf(stderr,
+ "Slave '%s': Error: set hw address "
+ "failed\n",
+ slave_ifname);
+ goto undo_mtu;
+ }
+
+ /* For old ABI the application needs to bring the
+ * slave back up
+ */
+ res = set_if_up(slave_ifname, slave_flags.ifr_flags);
+ if (res) {
+ fprintf(stderr,
+ "Slave '%s': Error: bring interface "
+ "down failed\n",
+ slave_ifname);
+ goto undo_slave_mac;
+ }
+ }
+ /* The driver is using a new ABI,
+ * so the driver takes care of setting
+ * the slave's hwaddr and bringing
+ * it up again
+ */
+ } else {
+ /* No hwaddr for master yet, so
+ * set the slave's hwaddr to it
+ */
+ if (abi_ver < 1) {
+ /* For old ABI, the master needs to be
+ * down before setting it's hwaddr
+ */
+ res = set_if_down(master_ifname, master_flags.ifr_flags);
+ if (res) {
+ fprintf(stderr,
+ "Master '%s': Error: bring interface "
+ "down failed\n",
+ master_ifname);
+ goto undo_mtu;
+ }
+ }
+
+ res = set_master_hwaddr(master_ifname,
+ &(slave_hwaddr.ifr_hwaddr));
+ if (res) {
+ fprintf(stderr,
+ "Master '%s': Error: set hw address "
+ "failed\n",
+ master_ifname);
+ goto undo_mtu;
+ }
+
+ if (abi_ver < 1) {
+ /* For old ABI, bring the master
+ * back up
+ */
+ res = set_if_up(master_ifname, master_flags.ifr_flags);
+ if (res) {
+ fprintf(stderr,
+ "Master '%s': Error: bring interface "
+ "up failed\n",
+ master_ifname);
+ goto undo_master_mac;
+ }
+ }
+
+ hwaddr_set = 1;
+ }
+
+ /* Do the real thing */
+ strncpy(ifr.ifr_name, master_ifname, IFNAMSIZ);
+ strncpy(ifr.ifr_slave, slave_ifname, IFNAMSIZ);
+ if ((ioctl(skfd, SIOCBONDENSLAVE, &ifr) < 0) &&
+ (ioctl(skfd, BOND_ENSLAVE_OLD, &ifr) < 0)) {
+ saved_errno = errno;
+ v_print("Master '%s': Error: SIOCBONDENSLAVE failed: %s\n",
+ master_ifname, strerror(saved_errno));
+ res = 1;
+ }
+
+ if (res) {
+ goto undo_master_mac;
+ }
+
+ return 0;
+
+/* rollback (best effort) */
+undo_master_mac:
+ set_master_hwaddr(master_ifname, &(master_hwaddr.ifr_hwaddr));
+ hwaddr_set = 0;
+ goto undo_mtu;
+undo_slave_mac:
+ set_slave_hwaddr(slave_ifname, &(slave_hwaddr.ifr_hwaddr));
+undo_mtu:
+ set_slave_mtu(slave_ifname, slave_mtu.ifr_mtu);
+ return res;
+}
+
+static int release(char *master_ifname, char *slave_ifname)
+{
+ struct ifreq ifr;
+ int res = 0;
+
+ if (!(slave_flags.ifr_flags & IFF_SLAVE)) {
+ fprintf(stderr,
+ "Illegal operation: The specified slave interface "
+ "'%s' is not a slave\n",
+ slave_ifname);
+ return 1;
+ }
+
+ strncpy(ifr.ifr_name, master_ifname, IFNAMSIZ);
+ strncpy(ifr.ifr_slave, slave_ifname, IFNAMSIZ);
+ if ((ioctl(skfd, SIOCBONDRELEASE, &ifr) < 0) &&
+ (ioctl(skfd, BOND_RELEASE_OLD, &ifr) < 0)) {
+ saved_errno = errno;
+ v_print("Master '%s': Error: SIOCBONDRELEASE failed: %s\n",
+ master_ifname, strerror(saved_errno));
+ return 1;
+ } else if (abi_ver < 1) {
+ /* The driver is using an old ABI, so we'll set the interface
+ * down to avoid any conflicts due to same MAC/IP
+ */
+ res = set_if_down(slave_ifname, slave_flags.ifr_flags);
+ if (res) {
+ fprintf(stderr,
+ "Slave '%s': Error: bring interface "
+ "down failed\n",
+ slave_ifname);
+ }
+ }
+
+ /* set to default mtu */
+ set_slave_mtu(slave_ifname, 1500);
+
+ return res;
+}
+
+static int get_if_settings(char *ifname, struct dev_ifr ifra[])
+{
+ int i;
+ int res = 0;
+
+ for (i = 0; ifra[i].req_ifr; i++) {
+ strncpy(ifra[i].req_ifr->ifr_name, ifname, IFNAMSIZ);
+ res = ioctl(skfd, ifra[i].req_type, ifra[i].req_ifr);
+ if (res < 0) {
+ saved_errno = errno;
+ v_print("Interface '%s': Error: %s failed: %s\n",
+ ifname, ifra[i].req_name,
+ strerror(saved_errno));
+
+ return saved_errno;
+ }
+ }
+
+ return 0;
+}
+
+static int get_slave_flags(char *slave_ifname)
+{
+ int res = 0;
+
+ strncpy(slave_flags.ifr_name, slave_ifname, IFNAMSIZ);
+ res = ioctl(skfd, SIOCGIFFLAGS, &slave_flags);
+ if (res < 0) {
+ saved_errno = errno;
+ v_print("Slave '%s': Error: SIOCGIFFLAGS failed: %s\n",
+ slave_ifname, strerror(saved_errno));
+ } else {
+ v_print("Slave %s: flags %04X.\n",
+ slave_ifname, slave_flags.ifr_flags);
+ }
+
+ return res;
+}
+
+static int set_master_hwaddr(char *master_ifname, struct sockaddr *hwaddr)
+{
+ unsigned char *addr = (unsigned char *)hwaddr->sa_data;
+ struct ifreq ifr;
+ int res = 0;
+
+ strncpy(ifr.ifr_name, master_ifname, IFNAMSIZ);
+ memcpy(&(ifr.ifr_hwaddr), hwaddr, sizeof(struct sockaddr));
+ res = ioctl(skfd, SIOCSIFHWADDR, &ifr);
+ if (res < 0) {
+ saved_errno = errno;
+ v_print("Master '%s': Error: SIOCSIFHWADDR failed: %s\n",
+ master_ifname, strerror(saved_errno));
+ return res;
+ } else {
+ v_print("Master '%s': hardware address set to "
+ "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x.\n",
+ master_ifname, addr[0], addr[1], addr[2],
+ addr[3], addr[4], addr[5]);
+ }
+
+ return res;
+}
+
+static int set_slave_hwaddr(char *slave_ifname, struct sockaddr *hwaddr)
+{
+ unsigned char *addr = (unsigned char *)hwaddr->sa_data;
+ struct ifreq ifr;
+ int res = 0;
+
+ strncpy(ifr.ifr_name, slave_ifname, IFNAMSIZ);
+ memcpy(&(ifr.ifr_hwaddr), hwaddr, sizeof(struct sockaddr));
+ res = ioctl(skfd, SIOCSIFHWADDR, &ifr);
+ if (res < 0) {
+ saved_errno = errno;
+
+ v_print("Slave '%s': Error: SIOCSIFHWADDR failed: %s\n",
+ slave_ifname, strerror(saved_errno));
+
+ if (saved_errno == EBUSY) {
+ v_print(" The device is busy: it must be idle "
+ "before running this command.\n");
+ } else if (saved_errno == EOPNOTSUPP) {
+ v_print(" The device does not support setting "
+ "the MAC address.\n"
+ " Your kernel likely does not support slave "
+ "devices.\n");
+ } else if (saved_errno == EINVAL) {
+ v_print(" The device's address type does not match "
+ "the master's address type.\n");
+ }
+ return res;
+ } else {
+ v_print("Slave '%s': hardware address set to "
+ "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x.\n",
+ slave_ifname, addr[0], addr[1], addr[2],
+ addr[3], addr[4], addr[5]);
+ }
+
+ return res;
+}
+
+static int set_slave_mtu(char *slave_ifname, int mtu)
+{
+ struct ifreq ifr;
+ int res = 0;
+
+ ifr.ifr_mtu = mtu;
+ strncpy(ifr.ifr_name, slave_ifname, IFNAMSIZ);
+
+ res = ioctl(skfd, SIOCSIFMTU, &ifr);
+ if (res < 0) {
+ saved_errno = errno;
+ v_print("Slave '%s': Error: SIOCSIFMTU failed: %s\n",
+ slave_ifname, strerror(saved_errno));
+ } else {
+ v_print("Slave '%s': MTU set to %d.\n", slave_ifname, mtu);
+ }
+
+ return res;
+}
+
+static int set_if_flags(char *ifname, short flags)
+{
+ struct ifreq ifr;
+ int res = 0;
+
+ ifr.ifr_flags = flags;
+ strncpy(ifr.ifr_name, ifname, IFNAMSIZ);
+
+ res = ioctl(skfd, SIOCSIFFLAGS, &ifr);
+ if (res < 0) {
+ saved_errno = errno;
+ v_print("Interface '%s': Error: SIOCSIFFLAGS failed: %s\n",
+ ifname, strerror(saved_errno));
+ } else {
+ v_print("Interface '%s': flags set to %04X.\n", ifname, flags);
+ }
+
+ return res;
+}
+
+static int set_if_up(char *ifname, short flags)
+{
+ return set_if_flags(ifname, flags | IFF_UP);
+}
+
+static int set_if_down(char *ifname, short flags)
+{
+ return set_if_flags(ifname, flags & ~IFF_UP);
+}
+
+static int clear_if_addr(char *ifname)
+{
+ struct ifreq ifr;
+ int res = 0;
+
+ strncpy(ifr.ifr_name, ifname, IFNAMSIZ);
+ ifr.ifr_addr.sa_family = AF_INET;
+ memset(ifr.ifr_addr.sa_data, 0, sizeof(ifr.ifr_addr.sa_data));
+
+ res = ioctl(skfd, SIOCSIFADDR, &ifr);
+ if (res < 0) {
+ saved_errno = errno;
+ v_print("Interface '%s': Error: SIOCSIFADDR failed: %s\n",
+ ifname, strerror(saved_errno));
+ } else {
+ v_print("Interface '%s': address cleared\n", ifname);
+ }
+
+ return res;
+}
+
+static int set_if_addr(char *master_ifname, char *slave_ifname)
+{
+ struct ifreq ifr;
+ int res;
+ unsigned char *ipaddr;
+ int i;
+ struct {
+ char *req_name;
+ char *desc;
+ int g_ioctl;
+ int s_ioctl;
+ } ifra[] = {
+ {"IFADDR", "addr", SIOCGIFADDR, SIOCSIFADDR},
+ {"DSTADDR", "destination addr", SIOCGIFDSTADDR, SIOCSIFDSTADDR},
+ {"BRDADDR", "broadcast addr", SIOCGIFBRDADDR, SIOCSIFBRDADDR},
+ {"NETMASK", "netmask", SIOCGIFNETMASK, SIOCSIFNETMASK},
+ {NULL, NULL, 0, 0},
+ };
+
+ for (i = 0; ifra[i].req_name; i++) {
+ strncpy(ifr.ifr_name, master_ifname, IFNAMSIZ);
+ res = ioctl(skfd, ifra[i].g_ioctl, &ifr);
+ if (res < 0) {
+ int saved_errno = errno;
+
+ v_print("Interface '%s': Error: SIOCG%s failed: %s\n",
+ master_ifname, ifra[i].req_name,
+ strerror(saved_errno));
+
+ ifr.ifr_addr.sa_family = AF_INET;
+ memset(ifr.ifr_addr.sa_data, 0,
+ sizeof(ifr.ifr_addr.sa_data));
+ }
+
+ strncpy(ifr.ifr_name, slave_ifname, IFNAMSIZ);
+ res = ioctl(skfd, ifra[i].s_ioctl, &ifr);
+ if (res < 0) {
+ int saved_errno = errno;
+
+ v_print("Interface '%s': Error: SIOCS%s failed: %s\n",
+ slave_ifname, ifra[i].req_name,
+ strerror(saved_errno));
+
+ return res;
+ }
+
+ ipaddr = ifr.ifr_addr.sa_data;
+ v_print("Interface '%s': set IP %s to %d.%d.%d.%d\n",
+ slave_ifname, ifra[i].desc,
+ ipaddr[0], ipaddr[1], ipaddr[2], ipaddr[3]);
+ }
+
+ return 0;
+}
/*
* Local variables:
@@ -768,3 +1107,4 @@
* compile-command: "gcc -Wall -Wstrict-prototypes -O -I/usr/src/linux/include ifenslave.c -o ifenslave"
* End:
*/
+
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TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)