/* Mode: C; * ifenslave.c: Configure network interfaces for parallel routing. * * This program controls the Linux implementation of running multiple * network interfaces in parallel. * * Author: Donald Becker <becker@cesdis.gsfc.nasa.gov> * Copyright 1994-1996 Donald Becker * * This program is free software; you can redistribute it * and/or modify it under the terms of the GNU General Public * License as published by the Free Software Foundation. * * The author may be reached as becker@CESDIS.gsfc.nasa.gov, or C/O * Center of Excellence in Space Data and Information Sciences * Code 930.5, Goddard Space Flight Center, Greenbelt MD 20771 * * Changes : * - 2000/10/02 Willy Tarreau <willy at meta-x.org> : * - few fixes. Master's MAC address is now correctly taken from * the first device when not previously set ; * - detach support : call BOND_RELEASE to detach an enslaved interface. * - give a mini-howto from command-line help : # ifenslave -h * * - 2001/02/16 Chad N. Tindel <ctindel at ieee dot org> : * - Master is now brought down before setting the MAC address. In * the 2.4 kernel you can't change the MAC address while the device is * up because you get EBUSY. * * - 2001/09/13 Takao Indoh <indou dot takao at jp dot fujitsu dot com> * - Added the ability to change the active interface on a mode 1 bond * at runtime. * * - 2001/10/23 Chad N. Tindel <ctindel at ieee dot org> : * - No longer set the MAC address of the master. The bond device will * take care of this itself * - Try the SIOC*** versions of the bonding ioctls before using the * old versions * - 2002/02/18 Erik Habbinga <erik_habbinga @ hp dot com> : * - ifr2.ifr_flags was not initialized in the hwaddr_notset case, * SIOCGIFFLAGS now called before hwaddr_notset test * * - 2002/10/31 Tony Cureington <tony.cureington * hp_com> : * - If the master does not have a hardware address when the first slave * is enslaved, the master is assigned the hardware address of that * slave - there is a comment in bonding.c stating "ifenslave takes * care of this now." This corrects the problem of slaves having * different hardware addresses in active-backup mode when * multiple interfaces are specified on a single ifenslave command * (ifenslave bond0 eth0 eth1). * * - 2003/03/18 - Tsippy Mendelson <tsippy.mendelson at intel dot com> and * Shmulik Hen <shmulik.hen at intel dot com> * - Moved setting the slave's mac address and openning it, from * the application to the driver. This enables support of modes * that need to use the unique mac address of each slave. * The driver also takes care of closing the slave and restoring its * original mac address upon release. * In addition, block possibility of enslaving before the master is up. * This prevents putting the system in an undefined state. * * - 2003/05/01 - Amir Noam <amir.noam at intel dot com> * - Added ABI version control to restore compatibility between * new/old ifenslave and new/old bonding. * - Prevent adding an adapter that is already a slave. * Fixes the problem of stalling the transmission and leaving * the slave in a down state. * * - 2003/05/01 - Shmulik Hen <shmulik.hen at intel dot com> * - Prevent enslaving if the bond device is down. * Fixes the problem of leaving the system in unstable state and * halting when trying to remove the module. * - Close socket on all abnormal exists. * - Add versioning scheme that follows that of the bonding driver. * current version is 1.0.0 as a base line. * * - 2003/05/22 - Jay Vosburgh <fubar at us dot ibm dot com> * - ifenslave -c was broken; it's now fixed * - Fixed problem with routes vanishing from master during enslave * processing. * * - 2003/05/27 - Amir Noam <amir.noam at intel dot com> * - Fix backward compatibility issues: * For drivers not using ABI versions, slave was set down while * it should be left up before enslaving. * Also, master was not set down and the default set_mac_address() * would fail and generate an error message in the system log. * - 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 handled 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 "1.1.0" #define APP_RELDATE "December 1, 2003" #define APP_NAME "ifenslave" static char *version = 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 [-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 *help_msg = "\n" " To create a bond device, simply follow these three steps :\n" " - ensure that the required drivers are properly loaded :\n" " # modprobe bonding ; modprobe <3c59x|eepro100|pcnet32|tulip|...>\n" " - 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 [{-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" " (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|--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> #include <stdlib.h> #include <stdio.h> #include <ctype.h> #include <string.h> #include <errno.h> #include <fcntl.h> #include <getopt.h> #include <sys/types.h> #include <sys/socket.h> #include <sys/ioctl.h> #include <linux/if.h> #include <net/if_arp.h> #include <linux/if_ether.h> #include <linux/if_bonding.h> #include <linux/sockios.h> typedef unsigned long long u64; /* hack, so we may include kernel's ethtool.h */ typedef __uint32_t u32; /* ditto */ typedef __uint16_t u16; /* ditto */ typedef __uint8_t u8; /* ditto */ #include <linux/ethtool.h> struct option longopts[] = { /* { 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_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_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[]) { char **spp, *master_ifname, *slave_ifname; int c, i, rv; int res = 0; int exclusive = 0; while ((c = getopt_long(argc, argv, "acdfhuvV", longopts, 0)) != EOF) { switch (c) { 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; case '?': fprintf(stderr, usage_msg); res = 2; goto out; } } /* options check */ if (exclusive > 1) { fprintf(stderr, usage_msg); res = 2; goto out; } if (opt_v || opt_V) { printf(version); if (opt_V) { res = 0; goto out; } } if (opt_u) { printf(usage_msg); res = 0; goto out; } if (opt_h) { printf(usage_msg); printf(help_msg); res = 0; goto out; } /* Open a basic socket */ if ((skfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { perror("socket"); res = 1; goto out; } 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 */ spp = argv + optind; master_ifname = *spp++; if (master_ifname == NULL) { fprintf(stderr, usage_msg); res = 2; goto out; } /* 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; } slave_ifname = *spp++; if (slave_ifname == NULL) { if (opt_d || opt_c) { fprintf(stderr, usage_msg); res = 2; goto out; } /* 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; } /* 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; } /* 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; } /* 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; /* 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; } /* Check master's hw addr */ for (i = 0; i < 6; i++) { if (hwaddr[i] != 0) { hwaddr_set = 1; break; } } 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); } } /* 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; } 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 { /* 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; } 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); } out: if (skfd >= 0) { close(skfd); } return res; } static short mif_flags; /* Get the inteface configuration from the kernel. */ static int if_getconfig(char *ifname) { struct ifreq ifr; 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); 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]); strcpy(ifr.ifr_name, ifname); if (ioctl(skfd, SIOCGIFHWADDR, &ifr) < 0) return -1; /* 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) { metric = 0; } else metric = ifr.ifr_metric; strcpy(ifr.ifr_name, ifname); if (ioctl(skfd, SIOCGIFMTU, &ifr) < 0) mtu = 0; else mtu = ifr.ifr_mtu; strcpy(ifr.ifr_name, ifname); if (ioctl(skfd, SIOCGIFDSTADDR, &ifr) < 0) { memset(&dstaddr, 0, sizeof(struct sockaddr)); } else dstaddr = ifr.ifr_dstaddr; strcpy(ifr.ifr_name, ifname); if (ioctl(skfd, SIOCGIFBRDADDR, &ifr) < 0) { memset(&broadaddr, 0, sizeof(struct sockaddr)); } else broadaddr = ifr.ifr_broadaddr; strcpy(ifr.ifr_name, ifname); if (ioctl(skfd, SIOCGIFNETMASK, &ifr) < 0) { memset(&netmask, 0, sizeof(struct sockaddr)); } else netmask = ifr.ifr_netmask; return 0; } static void if_print(char *ifname) { char buff[1024]; struct ifconf ifc; struct ifreq *ifr; int i; if (ifname == (char *)NULL) { ifc.ifc_len = sizeof(buff); ifc.ifc_buf = buff; if (ioctl(skfd, SIOCGIFCONF, &ifc) < 0) { 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); continue; } if (((mif_flags & IFF_UP) == 0) && !opt_a) continue; /*ife_print(&ife);*/ } } else { if (if_getconfig(ifname) < 0) { fprintf(stderr, "%s: unknown interface.\n", ifname); } } } static int get_drv_info(char *master_ifname) { struct ifreq ifr; struct ethtool_drvinfo info; char *endptr; memset(&ifr, 0, sizeof(ifr)); strncpy(ifr.ifr_name, master_ifname, IFNAMSIZ); ifr.ifr_data = (caddr_t)&info; info.cmd = ETHTOOL_GDRVINFO; strncpy(info.driver, "ifenslave", 32); snprintf(info.fw_version, 32, "%d", BOND_ABI_VERSION); 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; } 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; } 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. */ set_if_addr(master_ifname, slave_ifname); } 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)); } ipaddr = (unsigned char *)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: * version-control: t * kept-new-versions: 5 * c-indent-level: 4 * c-basic-offset: 4 * tab-width: 4 * compile-command: "gcc -Wall -Wstrict-prototypes -O -I/usr/src/linux/include ifenslave.c -o ifenslave" * End: */