X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=networking%2Fifconfig.c;h=8984b020773f082792931fdc3466f26c3874c539;hb=e695ac97fdd48808dd0a84d4725a063481a03c30;hp=f4fc0a4760251b2cfe4a80497ce21c2ef6b36907;hpb=10944524238532ad35aaefec89cf7cc950745d6b;p=oweals%2Fbusybox.git diff --git a/networking/ifconfig.c b/networking/ifconfig.c index f4fc0a476..8984b0207 100644 --- a/networking/ifconfig.c +++ b/networking/ifconfig.c @@ -10,7 +10,7 @@ * Authors of the original ifconfig was: * Fred N. van Kempen, * - * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. + * Licensed under GPLv2 or later, see file LICENSE in this source tree. */ /* @@ -26,21 +26,37 @@ * IPV6 support added by Bart Visscher */ +//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 #include #include -#if defined(__GLIBC__) && __GLIBC__ >=2 && __GLIBC_MINOR__ >= 1 -#include -#include -#else -#include -#include +#ifdef HAVE_NET_ETHERNET_H +# include #endif -#include "inet_common.h" -#include "busybox.h" #if ENABLE_FEATURE_IFCONFIG_SLIP -# include +# include #endif /* I don't know if this is needed for busybox or not. Anyone? */ @@ -158,13 +174,9 @@ struct in6_ifreq { #define ARG_ADD_DEL (A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER) -/* - * Set up the tables. Warning! They must have corresponding order! - */ - struct arg1opt { const char *name; - int selector; + unsigned short selector; unsigned short ifr_offset; }; @@ -182,87 +194,79 @@ struct options { #define ifreq_offsetof(x) offsetof(struct ifreq, x) +/* + * Set up the tables. Warning! They must have corresponding order! + */ + static const struct arg1opt Arg1Opt[] = { - {"SIOCSIFMETRIC", SIOCSIFMETRIC, ifreq_offsetof(ifr_metric)}, - {"SIOCSIFMTU", SIOCSIFMTU, ifreq_offsetof(ifr_mtu)}, - {"SIOCSIFTXQLEN", SIOCSIFTXQLEN, ifreq_offsetof(ifr_qlen)}, - {"SIOCSIFDSTADDR", SIOCSIFDSTADDR, ifreq_offsetof(ifr_dstaddr)}, - {"SIOCSIFNETMASK", SIOCSIFNETMASK, ifreq_offsetof(ifr_netmask)}, - {"SIOCSIFBRDADDR", SIOCSIFBRDADDR, ifreq_offsetof(ifr_broadaddr)}, + { "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 - {"SIOCSIFHWADDR", SIOCSIFHWADDR, ifreq_offsetof(ifr_hwaddr)}, + { "SIFHWADDR", SIOCSIFHWADDR, ifreq_offsetof(ifr_hwaddr) }, #endif - {"SIOCSIFDSTADDR", SIOCSIFDSTADDR, ifreq_offsetof(ifr_dstaddr)}, + { "SIFDSTADDR", SIOCSIFDSTADDR, ifreq_offsetof(ifr_dstaddr) }, #ifdef SIOCSKEEPALIVE - {"SIOCSKEEPALIVE", SIOCSKEEPALIVE, ifreq_offsetof(ifr_data)}, + { "SKEEPALIVE", SIOCSKEEPALIVE, ifreq_offsetof(ifr_data) }, #endif #ifdef SIOCSOUTFILL - {"SIOCSOUTFILL", SIOCSOUTFILL, ifreq_offsetof(ifr_data)}, + { "SOUTFILL", SIOCSOUTFILL, ifreq_offsetof(ifr_data) }, #endif #if ENABLE_FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ - {"SIOCSIFMAP", SIOCSIFMAP, ifreq_offsetof(ifr_map.mem_start)}, - {"SIOCSIFMAP", SIOCSIFMAP, ifreq_offsetof(ifr_map.base_addr)}, - {"SIOCSIFMAP", SIOCSIFMAP, ifreq_offsetof(ifr_map.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 - /* Last entry if for unmatched (possibly hostname) arg. */ #if ENABLE_FEATURE_IPV6 - {"SIOCSIFADDR", SIOCSIFADDR, ifreq_offsetof(ifr_addr)}, /* IPv6 version ignores the offset */ - {"SIOCDIFADDR", SIOCDIFADDR, ifreq_offsetof(ifr_addr)}, /* IPv6 version ignores the offset */ + { "SIFADDR", SIOCSIFADDR, ifreq_offsetof(ifr_addr) }, /* IPv6 version ignores the offset */ + { "DIFADDR", SIOCDIFADDR, ifreq_offsetof(ifr_addr) }, /* IPv6 version ignores the offset */ #endif - {"SIOCSIFADDR", SIOCSIFADDR, ifreq_offsetof(ifr_addr)}, + /* 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}, + { "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}, + { "hw", N_ARG, ARG_HW, 0 }, #endif - {"pointopoint", N_ARG | M_CLR, ARG_POINTOPOINT, IFF_POINTOPOINT}, + { "pointopoint", N_ARG | M_CLR, ARG_POINTOPOINT, IFF_POINTOPOINT }, #ifdef SIOCSKEEPALIVE - {"keepalive", N_ARG, ARG_KEEPALIVE, 0}, + { "keepalive", N_ARG, ARG_KEEPALIVE, 0 }, #endif #ifdef SIOCSOUTFILL - {"outfill", N_ARG, ARG_OUTFILL, 0}, + { "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}, + { "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)} + { "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) } }; -/* - * A couple of prototypes. - */ - -#if ENABLE_FEATURE_IFCONFIG_HW -static int in_ether(const char *bufp, struct sockaddr *sap); -#endif - -/* - * Our main function. - */ - -int ifconfig_main(int argc, char **argv); -int ifconfig_main(int argc, char **argv) +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; @@ -293,19 +297,17 @@ int ifconfig_main(int argc, char **argv) /* skip argv[0] */ ++argv; - --argc; #if ENABLE_FEATURE_IFCONFIG_STATUS - if (argc > 0 && (argv[0][0] == '-' && argv[0][1] == 'a' && !argv[0][2])) { + if (argv[0] && (argv[0][0] == '-' && argv[0][1] == 'a' && !argv[0][2])) { interface_opt_a = 1; - --argc; ++argv; } #endif - if (argc <= 1) { + if (!argv[0] || !argv[1]) { /* one or no args */ #if ENABLE_FEATURE_IFCONFIG_STATUS - return display_interfaces(argc ? *argv : NULL); + return display_interfaces(argv[0] /* can be NULL */); #else bb_error_msg_and_die("no support for status display"); #endif @@ -315,10 +317,10 @@ int ifconfig_main(int argc, char **argv) sockfd = xsocket(AF_INET, SOCK_DGRAM, 0); /* get interface name */ - safe_strncpy(ifr.ifr_name, *argv, IFNAMSIZ); + strncpy_IFNAMSIZ(ifr.ifr_name, *argv); /* Process the remaining arguments. */ - while (*++argv != (char *) NULL) { + while (*++argv != NULL) { p = *argv; mask = N_MASK; if (*p == '-') { /* If the arg starts with '-'... */ @@ -337,16 +339,16 @@ int ifconfig_main(int argc, char **argv) } /* We fell through, so treat as possible hostname. */ - a1op = Arg1Opt + (sizeof(Arg1Opt) / sizeof(Arg1Opt[0])) - 1; + a1op = Arg1Opt + ARRAY_SIZE(Arg1Opt) - 1; mask = op->arg_flags; goto HOSTNAME; FOUND_ARG: if (mask & ARG_MASK) { mask = op->arg_flags; - a1op = Arg1Opt + (op - OptArray); if (mask & A_NETMASK & did_flags) bb_show_usage(); + a1op = Arg1Opt + (op - OptArray); if (*++argv == NULL) { if (mask & A_ARG_REQ) bb_show_usage(); @@ -359,27 +361,18 @@ int ifconfig_main(int argc, char **argv) #if ENABLE_FEATURE_IFCONFIG_HW if (mask & A_CAST_RESOLVE) { #endif -#if ENABLE_FEATURE_IPV6 - char *prefix; - int prefix_len = 0; -#endif - /*safe_strncpy(host, *argv, (sizeof host));*/ host = *argv; -#if ENABLE_FEATURE_IPV6 - prefix = strchr(host, '/'); - if (prefix) { - prefix_len = xatou_range(prefix + 1, 0, 128); - *prefix = '\0'; - } -#endif + if (strcmp(host, "inet") == 0) + continue; /* compat stuff */ sai.sin_family = AF_INET; sai.sin_port = 0; - if (!strcmp(host, bb_str_default)) { + 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) + 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. */ @@ -387,30 +380,44 @@ int ifconfig_main(int argc, char **argv) } #endif else { - len_and_sockaddr *lsa = xhost2sockaddr(host, 0); + 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->sa.sa_family == AF_INET6) { + 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; - memcpy((char *) &ifr6.ifr6_addr, - (char *) &(lsa->sin6.sin6_addr), - sizeof(struct in6_addr)); - - /* Create a channel to the NET kernel. */ sockfd6 = xsocket(AF_INET6, SOCK_DGRAM, 0); - if (ioctl(sockfd6, SIOGIFINDEX, &ifr) < 0) - bb_perror_msg_and_die("SIOGIFINDEX"); + xioctl(sockfd6, SIOCGIFINDEX, &ifr); ifr6.ifr6_ifindex = ifr.ifr_ifindex; ifr6.ifr6_prefixlen = prefix_len; - if (ioctl(sockfd6, a1op->selector, &ifr6) < 0) - bb_perror_msg_and_die(a1op->name); + 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->sin.sin_addr; + sai.sin_addr = lsa->u.sin.sin_addr; if (ENABLE_FEATURE_CLEAN_UP) free(lsa); } @@ -424,41 +431,40 @@ int ifconfig_main(int argc, char **argv) #if ENABLE_FEATURE_IFCONFIG_HW } else { /* A_CAST_HOST_COPY_IN_ETHER */ /* This is the "hw" arg case. */ - if (strcmp("ether", *argv) || !*++argv) + smalluint hw_class = index_in_substrings("ether\0" + IF_FEATURE_HWIB("infiniband\0"), *argv) + 1; + if (!hw_class || !*++argv) bb_show_usage(); - /*safe_strncpy(host, *argv, sizeof(host));*/ host = *argv; - if (in_ether(host, &sa)) + 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)); + 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) { - if (ioctl(sockfd, SIOCGIFMAP, &ifr) < 0) - bb_perror_msg_and_die("SIOCGIFMAP"); + xioctl(sockfd, SIOCGIFMAP, &ifr); if ((mask & A_MAP_UCHAR) == A_MAP_UCHAR) - *((unsigned char *) p) = i; + *(unsigned char *) p = i; else if (mask & A_MAP_USHORT) - *((unsigned short *) p) = i; + *(unsigned short *) p = i; else - *((unsigned long *) p) = i; + *(unsigned long *) p = i; } else #endif if (mask & A_CAST_CHAR_PTR) - *((caddr_t *) p) = (caddr_t) i; + *(caddr_t *) p = (caddr_t) i; else /* A_CAST_INT */ - *((int *) p) = i; + *(int *) p = i; } - if (ioctl(sockfd, a1op->selector, &ifr) < 0) - bb_perror_msg_and_die(a1op->name); + ioctl_or_perror_and_die(sockfd, a1op->selector, &ifr, "SIOC%s", a1op->name); #ifdef QUESTIONABLE_ALIAS_CASE if (mask & A_COLON_CHK) { /* @@ -481,63 +487,18 @@ int ifconfig_main(int argc, char **argv) if (!(mask & A_SET_AFTER)) continue; mask = N_SET; - } + } /* if (mask & ARG_MASK) */ - if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) - bb_perror_msg_and_die("SIOCGIFFLAGS"); + xioctl(sockfd, SIOCGIFFLAGS, &ifr); selector = op->selector; if (mask & SET_MASK) ifr.ifr_flags |= selector; else ifr.ifr_flags &= ~selector; - if (ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0) - bb_perror_msg_and_die("SIOCSIFFLAGS"); + xioctl(sockfd, SIOCSIFFLAGS, &ifr); } /* while () */ if (ENABLE_FEATURE_CLEAN_UP) close(sockfd); return 0; } - -#if ENABLE_FEATURE_IFCONFIG_HW -/* Input an Ethernet address and convert to binary. */ -static int in_ether(const char *bufp, struct sockaddr *sap) -{ - char *ptr; - int i, j; - unsigned char val; - unsigned char c; - - sap->sa_family = ARPHRD_ETHER; - ptr = sap->sa_data; - - i = 0; - do { - j = val = 0; - - /* We might get a semicolon here - not required. */ - if (i && (*bufp == ':')) { - bufp++; - } - - do { - c = *bufp; - if (((unsigned char)(c - '0')) <= 9) { - c -= '0'; - } else if (((unsigned char)((c|0x20) - 'a')) <= 5) { - c = (c|0x20) - ('a'-10); - } else if (j && (c == ':' || c == 0)) { - break; - } else { - return -1; - } - ++bufp; - val <<= 4; - val += c; - } while (++j < 2); - *ptr++ = val; - } while (++i < ETH_ALEN); - - return *bufp; /* Error if we don't end at end of string. */ -} -#endif