| /* vi: set sw=4 ts=4: */ |
| /* |
| * ifconfig |
| * |
| * Similar to the standard Unix ifconfig, but with only the necessary |
| * parts for AF_INET, and without any printing of if info (for now). |
| * |
| * Bjorn Wesen, Axis Communications AB |
| * |
| * Authors of the original ifconfig was: |
| * Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org> |
| * |
| * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
| */ |
| /* |
| * Heavily modified by Manuel Novoa III Mar 6, 2001 |
| * |
| * From initial port to busybox, removed most of the redundancy by |
| * converting to a table-driven approach. Added several (optional) |
| * args missing from initial port. |
| * |
| * Still missing: media, tunnel. |
| * |
| * 2002-04-20 |
| * IPV6 support added by Bart Visscher <magick@linux-fan.com> |
| */ |
| //config:config IFCONFIG |
| //config: bool "ifconfig (12 kb)" |
| //config: default y |
| //config: help |
| //config: Ifconfig is used to configure the kernel-resident network interfaces. |
| //config: |
| //config:config FEATURE_IFCONFIG_STATUS |
| //config: bool "Enable status reporting output (+7k)" |
| //config: default y |
| //config: depends on IFCONFIG |
| //config: help |
| //config: If ifconfig is called with no arguments it will display the status |
| //config: of the currently active interfaces. |
| //config: |
| //config:config FEATURE_IFCONFIG_SLIP |
| //config: bool "Enable slip-specific options \"keepalive\" and \"outfill\"" |
| //config: default y |
| //config: depends on IFCONFIG |
| //config: help |
| //config: Allow "keepalive" and "outfill" support for SLIP. If you're not |
| //config: planning on using serial lines, leave this unchecked. |
| //config: |
| //config:config FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ |
| //config: bool "Enable options \"mem_start\", \"io_addr\", and \"irq\"" |
| //config: default y |
| //config: depends on IFCONFIG |
| //config: help |
| //config: Allow the start address for shared memory, start address for I/O, |
| //config: and/or the interrupt line used by the specified device. |
| //config: |
| //config:config FEATURE_IFCONFIG_HW |
| //config: bool "Enable option \"hw\" (ether only)" |
| //config: default y |
| //config: depends on IFCONFIG |
| //config: help |
| //config: Set the hardware address of this interface, if the device driver |
| //config: supports this operation. Currently, we only support the 'ether' |
| //config: class. |
| //config: |
| //config:config FEATURE_IFCONFIG_BROADCAST_PLUS |
| //config: bool "Set the broadcast automatically" |
| //config: default y |
| //config: depends on IFCONFIG |
| //config: help |
| //config: Setting this will make ifconfig attempt to find the broadcast |
| //config: automatically if the value '+' is used. |
| |
| //applet:IF_IFCONFIG(APPLET(ifconfig, BB_DIR_SBIN, BB_SUID_DROP)) |
| |
| //kbuild:lib-$(CONFIG_IFCONFIG) += ifconfig.o interface.o |
| |
| //usage:#define ifconfig_trivial_usage |
| //usage: IF_FEATURE_IFCONFIG_STATUS("[-a]") " interface [address]" |
| //usage:#define ifconfig_full_usage "\n\n" |
| //usage: "Configure a network interface\n" |
| //usage: "\n" |
| //usage: IF_FEATURE_IPV6( |
| //usage: " [add ADDRESS[/PREFIXLEN]]\n") |
| //usage: IF_FEATURE_IPV6( |
| //usage: " [del ADDRESS[/PREFIXLEN]]\n") |
| //usage: " [[-]broadcast [ADDRESS]] [[-]pointopoint [ADDRESS]]\n" |
| //usage: " [netmask ADDRESS] [dstaddr ADDRESS]\n" |
| //usage: IF_FEATURE_IFCONFIG_SLIP( |
| //usage: " [outfill NN] [keepalive NN]\n") |
| //usage: " " IF_FEATURE_IFCONFIG_HW("[hw ether" IF_FEATURE_HWIB("|infiniband")" ADDRESS] ") "[metric NN] [mtu NN]\n" |
| //usage: " [[-]trailers] [[-]arp] [[-]allmulti]\n" |
| //usage: " [multicast] [[-]promisc] [txqueuelen NN] [[-]dynamic]\n" |
| //usage: IF_FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ( |
| //usage: " [mem_start NN] [io_addr NN] [irq NN]\n") |
| //usage: " [up|down] ..." |
| |
| #include "libbb.h" |
| #include "inet_common.h" |
| #include <net/if.h> |
| #include <net/if_arp.h> |
| #include <netinet/in.h> |
| #ifdef HAVE_NET_ETHERNET_H |
| # include <net/ethernet.h> |
| #endif |
| |
| #if ENABLE_FEATURE_IFCONFIG_SLIP |
| # include <linux/if_slip.h> |
| #endif |
| |
| /* I don't know if this is needed for busybox or not. Anyone? */ |
| #define QUESTIONABLE_ALIAS_CASE |
| |
| |
| /* Defines for glibc2.0 users. */ |
| #ifndef SIOCSIFTXQLEN |
| # define SIOCSIFTXQLEN 0x8943 |
| # define SIOCGIFTXQLEN 0x8942 |
| #endif |
| |
| /* ifr_qlen is ifru_ivalue, but it isn't present in 2.0 kernel headers */ |
| #ifndef ifr_qlen |
| # define ifr_qlen ifr_ifru.ifru_mtu |
| #endif |
| |
| #ifndef IFF_DYNAMIC |
| # define IFF_DYNAMIC 0x8000 /* dialup device with changing addresses */ |
| #endif |
| |
| #if ENABLE_FEATURE_IPV6 |
| struct in6_ifreq { |
| struct in6_addr ifr6_addr; |
| uint32_t ifr6_prefixlen; |
| int ifr6_ifindex; |
| }; |
| #endif |
| |
| /* |
| * Here are the bit masks for the "flags" member of struct options below. |
| * N_ signifies no arg prefix; M_ signifies arg prefixed by '-'. |
| * CLR clears the flag; SET sets the flag; ARG signifies (optional) arg. |
| */ |
| #define N_CLR 0x01 |
| #define M_CLR 0x02 |
| #define N_SET 0x04 |
| #define M_SET 0x08 |
| #define N_ARG 0x10 |
| #define M_ARG 0x20 |
| |
| #define M_MASK (M_CLR | M_SET | M_ARG) |
| #define N_MASK (N_CLR | N_SET | N_ARG) |
| #define SET_MASK (N_SET | M_SET) |
| #define CLR_MASK (N_CLR | M_CLR) |
| #define SET_CLR_MASK (SET_MASK | CLR_MASK) |
| #define ARG_MASK (M_ARG | N_ARG) |
| |
| /* |
| * Here are the bit masks for the "arg_flags" member of struct options below. |
| */ |
| |
| /* |
| * cast type: |
| * 00 int |
| * 01 char * |
| * 02 HOST_COPY in_ether |
| * 03 HOST_COPY INET_resolve |
| */ |
| #define A_CAST_TYPE 0x03 |
| /* |
| * map type: |
| * 00 not a map type (mem_start, io_addr, irq) |
| * 04 memstart (unsigned long) |
| * 08 io_addr (unsigned short) |
| * 0C irq (unsigned char) |
| */ |
| #define A_MAP_TYPE 0x0C |
| #define A_ARG_REQ 0x10 /* Set if an arg is required. */ |
| #define A_NETMASK 0x20 /* Set if netmask (check for multiple sets). */ |
| #define A_SET_AFTER 0x40 /* Set a flag at the end. */ |
| #define A_COLON_CHK 0x80 /* Is this needed? See below. */ |
| #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS |
| #define A_HOSTNAME 0x100 /* Set if it is ip addr. */ |
| #define A_BROADCAST 0x200 /* Set if it is broadcast addr. */ |
| #else |
| #define A_HOSTNAME 0 |
| #define A_BROADCAST 0 |
| #endif |
| |
| /* |
| * These defines are for dealing with the A_CAST_TYPE field. |
| */ |
| #define A_CAST_CHAR_PTR 0x01 |
| #define A_CAST_RESOLVE 0x01 |
| #define A_CAST_HOST_COPY 0x02 |
| #define A_CAST_HOST_COPY_IN_ETHER A_CAST_HOST_COPY |
| #define A_CAST_HOST_COPY_RESOLVE (A_CAST_HOST_COPY | A_CAST_RESOLVE) |
| |
| /* |
| * These defines are for dealing with the A_MAP_TYPE field. |
| */ |
| #define A_MAP_ULONG 0x04 /* memstart */ |
| #define A_MAP_USHORT 0x08 /* io_addr */ |
| #define A_MAP_UCHAR 0x0C /* irq */ |
| |
| /* |
| * Define the bit masks signifying which operations to perform for each arg. |
| */ |
| |
| #define ARG_METRIC (A_ARG_REQ /*| A_CAST_INT*/) |
| #define ARG_MTU (A_ARG_REQ /*| A_CAST_INT*/) |
| #define ARG_TXQUEUELEN (A_ARG_REQ /*| A_CAST_INT*/) |
| #define ARG_MEM_START (A_ARG_REQ | A_MAP_ULONG) |
| #define ARG_IO_ADDR (A_ARG_REQ | A_MAP_ULONG) |
| #define ARG_IRQ (A_ARG_REQ | A_MAP_UCHAR) |
| #define ARG_DSTADDR (A_ARG_REQ | A_CAST_HOST_COPY_RESOLVE) |
| #define ARG_NETMASK (A_ARG_REQ | A_CAST_HOST_COPY_RESOLVE | A_NETMASK) |
| #define ARG_BROADCAST (A_ARG_REQ | A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER | A_BROADCAST) |
| #define ARG_HW (A_ARG_REQ | A_CAST_HOST_COPY_IN_ETHER) |
| #define ARG_POINTOPOINT (A_ARG_REQ | A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER) |
| #define ARG_KEEPALIVE (A_ARG_REQ | A_CAST_CHAR_PTR) |
| #define ARG_OUTFILL (A_ARG_REQ | A_CAST_CHAR_PTR) |
| #define ARG_HOSTNAME (A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER | A_COLON_CHK | A_HOSTNAME) |
| #define ARG_ADD_DEL (A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER) |
| |
| |
| struct arg1opt { |
| const char *name; |
| unsigned short selector; |
| unsigned short ifr_offset; |
| }; |
| |
| struct options { |
| const char *name; |
| #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS |
| const unsigned int flags:6; |
| const unsigned int arg_flags:10; |
| #else |
| const unsigned char flags; |
| const unsigned char arg_flags; |
| #endif |
| const unsigned short selector; |
| }; |
| |
| #define ifreq_offsetof(x) offsetof(struct ifreq, x) |
| |
| /* |
| * Set up the tables. Warning! They must have corresponding order! |
| */ |
| |
| static const struct arg1opt Arg1Opt[] = { |
| { "SIFMETRIC", SIOCSIFMETRIC, ifreq_offsetof(ifr_metric) }, |
| { "SIFMTU", SIOCSIFMTU, ifreq_offsetof(ifr_mtu) }, |
| { "SIFTXQLEN", SIOCSIFTXQLEN, ifreq_offsetof(ifr_qlen) }, |
| { "SIFDSTADDR", SIOCSIFDSTADDR, ifreq_offsetof(ifr_dstaddr) }, |
| { "SIFNETMASK", SIOCSIFNETMASK, ifreq_offsetof(ifr_netmask) }, |
| { "SIFBRDADDR", SIOCSIFBRDADDR, ifreq_offsetof(ifr_broadaddr) }, |
| #if ENABLE_FEATURE_IFCONFIG_HW |
| { "SIFHWADDR", SIOCSIFHWADDR, ifreq_offsetof(ifr_hwaddr) }, |
| #endif |
| { "SIFDSTADDR", SIOCSIFDSTADDR, ifreq_offsetof(ifr_dstaddr) }, |
| #ifdef SIOCSKEEPALIVE |
| { "SKEEPALIVE", SIOCSKEEPALIVE, ifreq_offsetof(ifr_data) }, |
| #endif |
| #ifdef SIOCSOUTFILL |
| { "SOUTFILL", SIOCSOUTFILL, ifreq_offsetof(ifr_data) }, |
| #endif |
| #if ENABLE_FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ |
| { "SIFMAP", SIOCSIFMAP, ifreq_offsetof(ifr_map.mem_start) }, |
| { "SIFMAP", SIOCSIFMAP, ifreq_offsetof(ifr_map.base_addr) }, |
| { "SIFMAP", SIOCSIFMAP, ifreq_offsetof(ifr_map.irq) }, |
| #endif |
| #if ENABLE_FEATURE_IPV6 |
| { "SIFADDR", SIOCSIFADDR, ifreq_offsetof(ifr_addr) }, /* IPv6 version ignores the offset */ |
| { "DIFADDR", SIOCDIFADDR, ifreq_offsetof(ifr_addr) }, /* IPv6 version ignores the offset */ |
| #endif |
| /* Last entry is for unmatched (assumed to be hostname/address) arg. */ |
| { "SIFADDR", SIOCSIFADDR, ifreq_offsetof(ifr_addr) }, |
| }; |
| |
| static const struct options OptArray[] = { |
| { "metric", N_ARG, ARG_METRIC, 0 }, |
| { "mtu", N_ARG, ARG_MTU, 0 }, |
| { "txqueuelen", N_ARG, ARG_TXQUEUELEN, 0 }, |
| { "dstaddr", N_ARG, ARG_DSTADDR, 0 }, |
| { "netmask", N_ARG, ARG_NETMASK, 0 }, |
| { "broadcast", N_ARG | M_CLR, ARG_BROADCAST, IFF_BROADCAST }, |
| #if ENABLE_FEATURE_IFCONFIG_HW |
| { "hw", N_ARG, ARG_HW, 0 }, |
| #endif |
| { "pointopoint", N_ARG | M_CLR, ARG_POINTOPOINT, IFF_POINTOPOINT }, |
| #ifdef SIOCSKEEPALIVE |
| { "keepalive", N_ARG, ARG_KEEPALIVE, 0 }, |
| #endif |
| #ifdef SIOCSOUTFILL |
| { "outfill", N_ARG, ARG_OUTFILL, 0 }, |
| #endif |
| #if ENABLE_FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ |
| { "mem_start", N_ARG, ARG_MEM_START, 0 }, |
| { "io_addr", N_ARG, ARG_IO_ADDR, 0 }, |
| { "irq", N_ARG, ARG_IRQ, 0 }, |
| #endif |
| #if ENABLE_FEATURE_IPV6 |
| { "add", N_ARG, ARG_ADD_DEL, 0 }, |
| { "del", N_ARG, ARG_ADD_DEL, 0 }, |
| #endif |
| { "arp", N_CLR | M_SET, 0, IFF_NOARP }, |
| { "trailers", N_CLR | M_SET, 0, IFF_NOTRAILERS }, |
| { "promisc", N_SET | M_CLR, 0, IFF_PROMISC }, |
| { "multicast", N_SET | M_CLR, 0, IFF_MULTICAST }, |
| { "allmulti", N_SET | M_CLR, 0, IFF_ALLMULTI }, |
| { "dynamic", N_SET | M_CLR, 0, IFF_DYNAMIC }, |
| { "up", N_SET, 0, (IFF_UP | IFF_RUNNING) }, |
| { "down", N_CLR, 0, IFF_UP }, |
| { NULL, 0, ARG_HOSTNAME, (IFF_UP | IFF_RUNNING) } |
| }; |
| |
| int ifconfig_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| int ifconfig_main(int argc UNUSED_PARAM, char **argv) |
| { |
| struct ifreq ifr; |
| struct sockaddr_in sai; |
| #if ENABLE_FEATURE_IFCONFIG_HW |
| struct sockaddr sa; |
| #endif |
| const struct arg1opt *a1op; |
| const struct options *op; |
| int sockfd; /* socket fd we use to manipulate stuff with */ |
| int selector; |
| #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS |
| unsigned int mask; |
| unsigned int did_flags; |
| unsigned int sai_hostname, sai_netmask; |
| #else |
| unsigned char mask; |
| unsigned char did_flags; |
| #endif |
| char *p; |
| /*char host[128];*/ |
| const char *host = NULL; /* make gcc happy */ |
| IF_FEATURE_IFCONFIG_STATUS(char *show_all_param;) |
| |
| did_flags = 0; |
| #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS |
| sai_hostname = 0; |
| sai_netmask = 0; |
| #endif |
| |
| /* skip argv[0] */ |
| ++argv; |
| |
| #if ENABLE_FEATURE_IFCONFIG_STATUS |
| show_all_param = NULL; |
| if (argv[0] && argv[0][0] == '-' && argv[0][1] == 'a' && !argv[0][2]) { |
| ++argv; |
| show_all_param = IFNAME_SHOW_DOWNED_TOO; |
| } |
| #endif |
| |
| if (!argv[0] || !argv[1]) { /* one or no args */ |
| #if ENABLE_FEATURE_IFCONFIG_STATUS |
| return display_interfaces(argv[0] ? argv[0] : show_all_param); |
| #else |
| bb_simple_error_msg_and_die("no support for status display"); |
| #endif |
| } |
| |
| /* Create a channel to the NET kernel. */ |
| sockfd = xsocket(AF_INET, SOCK_DGRAM, 0); |
| |
| /* get interface name */ |
| strncpy_IFNAMSIZ(ifr.ifr_name, *argv); |
| |
| /* Process the remaining arguments. */ |
| while (*++argv != NULL) { |
| p = *argv; |
| mask = N_MASK; |
| if (*p == '-') { /* If the arg starts with '-'... */ |
| ++p; /* advance past it and */ |
| mask = M_MASK; /* set the appropriate mask. */ |
| } |
| for (op = OptArray; op->name; op++) { /* Find table entry. */ |
| if (strcmp(p, op->name) == 0) { /* If name matches... */ |
| mask &= op->flags; |
| if (mask) /* set the mask and go. */ |
| goto FOUND_ARG; |
| /* If we get here, there was a valid arg with an */ |
| /* invalid '-' prefix. */ |
| bb_error_msg_and_die("bad: '%s'", p-1); |
| } |
| } |
| |
| /* We fell through, so treat as possible hostname. */ |
| a1op = Arg1Opt + ARRAY_SIZE(Arg1Opt) - 1; |
| mask = op->arg_flags; |
| goto HOSTNAME; |
| |
| FOUND_ARG: |
| if (mask & ARG_MASK) { |
| mask = op->arg_flags; |
| if (mask & A_NETMASK & did_flags) |
| bb_show_usage(); |
| a1op = Arg1Opt + (op - OptArray); |
| if (*++argv == NULL) { |
| if (mask & A_ARG_REQ) |
| bb_show_usage(); |
| --argv; |
| mask &= A_SET_AFTER; /* just for broadcast */ |
| } else { /* got an arg so process it */ |
| HOSTNAME: |
| did_flags |= (mask & (A_NETMASK|A_HOSTNAME)); |
| if (mask & A_CAST_HOST_COPY) { |
| #if ENABLE_FEATURE_IFCONFIG_HW |
| if (mask & A_CAST_RESOLVE) { |
| #endif |
| host = *argv; |
| if (strcmp(host, "inet") == 0) |
| continue; /* compat stuff */ |
| sai.sin_family = AF_INET; |
| sai.sin_port = 0; |
| if (strcmp(host, "default") == 0) { |
| /* Default is special, meaning 0.0.0.0. */ |
| sai.sin_addr.s_addr = INADDR_ANY; |
| } |
| #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS |
| else if ((host[0] == '+' && !host[1]) |
| && (mask & A_BROADCAST) |
| && (did_flags & (A_NETMASK|A_HOSTNAME)) == (A_NETMASK|A_HOSTNAME) |
| ) { |
| /* + is special, meaning broadcast is derived. */ |
| sai.sin_addr.s_addr = (~sai_netmask) | (sai_hostname & sai_netmask); |
| } |
| #endif |
| else { |
| len_and_sockaddr *lsa; |
| #if ENABLE_FEATURE_IPV6 |
| char *prefix; |
| int prefix_len = 0; |
| prefix = strchr(host, '/'); |
| if (prefix) { |
| prefix_len = xatou_range(prefix + 1, 0, 128); |
| *prefix = '\0'; |
| } |
| resolve: |
| #endif |
| lsa = xhost2sockaddr(host, 0); |
| #if ENABLE_FEATURE_IPV6 |
| if (lsa->u.sa.sa_family != AF_INET6 && prefix) { |
| /* TODO: we do not support "ifconfig eth0 up 1.2.3.4/17". |
| * For now, just make it fail instead of silently ignoring "/17" part: |
| */ |
| *prefix = '/'; |
| goto resolve; |
| } |
| if (lsa->u.sa.sa_family == AF_INET6) { |
| int sockfd6; |
| struct in6_ifreq ifr6; |
| |
| sockfd6 = xsocket(AF_INET6, SOCK_DGRAM, 0); |
| xioctl(sockfd6, SIOCGIFINDEX, &ifr); |
| ifr6.ifr6_ifindex = ifr.ifr_ifindex; |
| ifr6.ifr6_prefixlen = prefix_len; |
| memcpy(&ifr6.ifr6_addr, |
| &lsa->u.sin6.sin6_addr, |
| sizeof(struct in6_addr)); |
| ioctl_or_perror_and_die(sockfd6, a1op->selector, &ifr6, "SIOC%s", a1op->name); |
| if (ENABLE_FEATURE_CLEAN_UP) |
| free(lsa); |
| continue; |
| } |
| #endif |
| sai.sin_addr = lsa->u.sin.sin_addr; |
| if (ENABLE_FEATURE_CLEAN_UP) |
| free(lsa); |
| } |
| #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS |
| if (mask & A_HOSTNAME) |
| sai_hostname = sai.sin_addr.s_addr; |
| if (mask & A_NETMASK) |
| sai_netmask = sai.sin_addr.s_addr; |
| #endif |
| p = (char *) &sai; |
| #if ENABLE_FEATURE_IFCONFIG_HW |
| } else { /* A_CAST_HOST_COPY_IN_ETHER */ |
| /* This is the "hw" arg case. */ |
| smalluint hw_class = index_in_substrings("ether\0" |
| IF_FEATURE_HWIB("infiniband\0"), *argv) + 1; |
| if (!hw_class || !*++argv) |
| bb_show_usage(); |
| host = *argv; |
| if (hw_class == 1 ? in_ether(host, &sa) : in_ib(host, &sa)) |
| bb_error_msg_and_die("invalid hw-addr %s", host); |
| p = (char *) &sa; |
| } |
| #endif |
| memcpy( ((char *)&ifr) + a1op->ifr_offset, |
| p, sizeof(struct sockaddr)); |
| } else { |
| /* FIXME: error check?? */ |
| unsigned long i = strtoul(*argv, NULL, 0); |
| p = ((char *)&ifr) + a1op->ifr_offset; |
| #if ENABLE_FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ |
| if (mask & A_MAP_TYPE) { |
| xioctl(sockfd, SIOCGIFMAP, &ifr); |
| if ((mask & A_MAP_UCHAR) == A_MAP_UCHAR) |
| *(unsigned char *) p = i; |
| else if (mask & A_MAP_USHORT) |
| *(unsigned short *) p = i; |
| else |
| *(unsigned long *) p = i; |
| } else |
| #endif |
| if (mask & A_CAST_CHAR_PTR) |
| *(caddr_t *) p = (caddr_t) i; |
| else /* A_CAST_INT */ |
| *(int *) p = i; |
| } |
| |
| ioctl_or_perror_and_die(sockfd, a1op->selector, &ifr, "SIOC%s", a1op->name); |
| #ifdef QUESTIONABLE_ALIAS_CASE |
| if (mask & A_COLON_CHK) { |
| /* |
| * Don't do the set_flag() if the address is an alias with |
| * a '-' at the end, since it's deleted already! - Roman |
| * |
| * Should really use regex.h here, not sure though how well |
| * it'll go with the cross-platform support etc. |
| */ |
| char *ptr; |
| short int found_colon = 0; |
| for (ptr = ifr.ifr_name; *ptr; ptr++) |
| if (*ptr == ':') |
| found_colon++; |
| if (found_colon && ptr[-1] == '-') |
| continue; |
| } |
| #endif |
| } |
| if (!(mask & A_SET_AFTER)) |
| continue; |
| mask = N_SET; |
| } /* if (mask & ARG_MASK) */ |
| |
| xioctl(sockfd, SIOCGIFFLAGS, &ifr); |
| selector = op->selector; |
| if (mask & SET_MASK) |
| ifr.ifr_flags |= selector; |
| else |
| ifr.ifr_flags &= ~selector; |
| xioctl(sockfd, SIOCSIFFLAGS, &ifr); |
| } /* while () */ |
| |
| if (ENABLE_FEATURE_CLEAN_UP) |
| close(sockfd); |
| return 0; |
| } |