X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=networking%2Fifconfig.c;h=7b358c43f06c500121264220cfc2b65a1b28f592;hb=5929edc1fac4340f99ed84e92bf3a2bedd4177c2;hp=d0ee4c3a5a6583ce4fb321c47b27f19e329bc742;hpb=8ae4cab4a85eea297a0b8ea9aa65c3c23b0a664b;p=oweals%2Fbusybox.git diff --git a/networking/ifconfig.c b/networking/ifconfig.c index d0ee4c3a5..7b358c43f 100644 --- a/networking/ifconfig.c +++ b/networking/ifconfig.c @@ -1,3 +1,4 @@ +/* vi: set sw=4 ts=4: */ /* ifconfig * * Similar to the standard Unix ifconfig, but with only the necessary @@ -6,17 +7,10 @@ * Bjorn Wesen, Axis Communications AB * * - * Authors of the original ifconfig was: + * Authors of the original ifconfig was: * Fred N. van Kempen, * - * 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; either version 2 of the License, or (at - * your option) any later version. - * - * $Id: ifconfig.c,v 1.20 2002/11/26 09:02:05 bug1 Exp $ - * + * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. */ /* @@ -37,16 +31,24 @@ #include /* strcmp and friends */ #include /* isdigit and friends */ #include /* offsetof */ +#include +#include #include +#include #include #include -#include -#include +#if __GLIBC__ >=2 && __GLIBC_MINOR >= 1 +#include +#include +#else +#include +#include +#endif #include "inet_common.h" #include "busybox.h" #ifdef CONFIG_FEATURE_IFCONFIG_SLIP -# include +# include #endif /* I don't know if this is needed for busybox or not. Anyone? */ @@ -119,6 +121,13 @@ struct in6_ifreq { #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. */ +#ifdef CONFIG_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. @@ -148,12 +157,12 @@ struct in6_ifreq { #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) +#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_CAST_HOST_COPY_RESOLVE | A_SET_AFTER) +#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) +#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) @@ -163,84 +172,89 @@ struct in6_ifreq { struct arg1opt { const char *name; - unsigned short selector; + int selector; unsigned short ifr_offset; }; struct options { const char *name; +#ifdef CONFIG_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) static const struct arg1opt Arg1Opt[] = { - {"SIOCSIFMETRIC", SIOCSIFMETRIC, ifreq_offsetof(ifr_metric)}, - {"SIOCSIFMTU", SIOCSIFMTU, ifreq_offsetof(ifr_mtu)}, - {"SIOCSIFTXQLEN", SIOCSIFTXQLEN, ifreq_offsetof(ifr_qlen)}, + {"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)}, #ifdef CONFIG_FEATURE_IFCONFIG_HW - {"SIOCSIFHWADDR", SIOCSIFHWADDR, ifreq_offsetof(ifr_hwaddr)}, + {"SIOCSIFHWADDR", SIOCSIFHWADDR, ifreq_offsetof(ifr_hwaddr)}, #endif {"SIOCSIFDSTADDR", SIOCSIFDSTADDR, ifreq_offsetof(ifr_dstaddr)}, #ifdef SIOCSKEEPALIVE {"SIOCSKEEPALIVE", SIOCSKEEPALIVE, ifreq_offsetof(ifr_data)}, #endif #ifdef SIOCSOUTFILL - {"SIOCSOUTFILL", SIOCSOUTFILL, ifreq_offsetof(ifr_data)}, + {"SIOCSOUTFILL", SIOCSOUTFILL, ifreq_offsetof(ifr_data)}, #endif #ifdef CONFIG_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)}, + {"SIOCSIFMAP", SIOCSIFMAP, ifreq_offsetof(ifr_map.mem_start)}, + {"SIOCSIFMAP", SIOCSIFMAP, ifreq_offsetof(ifr_map.base_addr)}, + {"SIOCSIFMAP", SIOCSIFMAP, ifreq_offsetof(ifr_map.irq)}, #endif /* Last entry if for unmatched (possibly hostname) arg. */ #ifdef CONFIG_FEATURE_IPV6 - {"SIOCSIFADDR", SIOCSIFADDR, ifreq_offsetof(ifr_addr)}, /* IPv6 version ignores the offset */ - {"SIOCDIFADDR", SIOCDIFADDR, ifreq_offsetof(ifr_addr)}, /* IPv6 version ignores the offset */ + {"SIOCSIFADDR", SIOCSIFADDR, ifreq_offsetof(ifr_addr)}, /* IPv6 version ignores the offset */ + {"SIOCDIFADDR", SIOCDIFADDR, ifreq_offsetof(ifr_addr)}, /* IPv6 version ignores the offset */ #endif - {"SIOCSIFADDR", SIOCSIFADDR, ifreq_offsetof(ifr_addr)}, + {"SIOCSIFADDR", 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}, #ifdef CONFIG_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}, #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 #ifdef CONFIG_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 #ifdef CONFIG_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)} }; /* @@ -264,7 +278,6 @@ int ifconfig_main(int argc, char **argv) { struct ifreq ifr; struct sockaddr_in sai; - #ifdef CONFIG_FEATURE_IPV6 struct sockaddr_in6 sai6; #endif @@ -276,20 +289,30 @@ int ifconfig_main(int argc, char **argv) int sockfd; /* socket fd we use to manipulate stuff with */ int goterr; int selector; - char *p; - char host[128]; +#ifdef CONFIG_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]; goterr = 0; did_flags = 0; +#ifdef CONFIG_FEATURE_IFCONFIG_BROADCAST_PLUS + sai_hostname = 0; + sai_netmask = 0; +#endif /* skip argv[0] */ ++argv; --argc; #ifdef CONFIG_FEATURE_IFCONFIG_STATUS - if ((argc > 0) && (strcmp(*argv, "-a") == 0)) { + if ((argc > 0) && (((*argv)[0] == '-') && ((*argv)[1] == 'a') && !(*argv)[2])) { interface_opt_a = 1; --argc; ++argv; @@ -300,15 +323,13 @@ int ifconfig_main(int argc, char **argv) #ifdef CONFIG_FEATURE_IFCONFIG_STATUS return display_interfaces(argc ? *argv : NULL); #else - error_msg_and_die + bb_error_msg_and_die ("ifconfig was not compiled with interface status display support."); #endif } /* Create a channel to the NET kernel. */ - if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { - perror_msg_and_die("socket"); - } + sockfd = bb_xsocket(AF_INET, SOCK_DGRAM, 0); /* get interface name */ safe_strncpy(ifr.ifr_name, *argv, IFNAMSIZ); @@ -324,7 +345,7 @@ int ifconfig_main(int argc, char **argv) for (op = OptArray; op->name; op++) { /* Find table entry. */ if (strcmp(p, op->name) == 0) { /* If name matches... */ if ((mask &= op->flags)) { /* set the mask and go. */ - goto FOUND_ARG;; + goto FOUND_ARG; } /* If we get here, there was a valid arg with an */ /* invalid '-' prefix. */ @@ -343,18 +364,18 @@ int ifconfig_main(int argc, char **argv) mask = op->arg_flags; a1op = Arg1Opt + (op - OptArray); if (mask & A_NETMASK & did_flags) { - show_usage(); + bb_show_usage(); } if (*++argv == NULL) { if (mask & A_ARG_REQ) { - show_usage(); + bb_show_usage(); } else { --argv; mask &= A_SET_AFTER; /* just for broadcast */ } } else { /* got an arg so process it */ HOSTNAME: - did_flags |= (mask & A_NETMASK); + did_flags |= (mask & (A_NETMASK|A_HOSTNAME)); if (mask & A_CAST_HOST_COPY) { #ifdef CONFIG_FEATURE_IFCONFIG_HW if (mask & A_CAST_RESOLVE) { @@ -367,8 +388,9 @@ int ifconfig_main(int argc, char **argv) safe_strncpy(host, *argv, (sizeof host)); #ifdef CONFIG_FEATURE_IPV6 if ((prefix = strchr(host, '/'))) { - prefix_len = atol(prefix + 1); - if ((prefix_len < 0) || (prefix_len > 128)) { + if (safe_strtoi(prefix + 1, &prefix_len) || + (prefix_len < 0) || (prefix_len > 128)) + { ++goterr; goto LOOP; } @@ -381,10 +403,14 @@ int ifconfig_main(int argc, char **argv) if (!strcmp(host, bb_INET_default)) { /* Default is special, meaning 0.0.0.0. */ sai.sin_addr.s_addr = INADDR_ANY; +#ifdef CONFIG_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 #ifdef CONFIG_FEATURE_IPV6 - } else - if (inet_pton(AF_INET6, host, &sai6.sin6_addr) > - 0) { + } else if (inet_pton(AF_INET6, host, &sai6.sin6_addr) > 0) { int sockfd6; struct in6_ifreq ifr6; @@ -393,9 +419,8 @@ int ifconfig_main(int argc, char **argv) sizeof(struct in6_addr)); /* Create a channel to the NET kernel. */ - if ((sockfd6 = - socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { - perror_msg_and_die("socket6"); + if ((sockfd6 = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { + bb_perror_msg_and_die("socket6"); } if (ioctl(sockfd6, SIOGIFINDEX, &ifr) < 0) { perror("SIOGIFINDEX"); @@ -412,19 +437,32 @@ int ifconfig_main(int argc, char **argv) #endif } else if (inet_aton(host, &sai.sin_addr) == 0) { /* It's not a dotted quad. */ - ++goterr; - continue; + struct hostent *hp; + if ((hp = gethostbyname(host)) == (struct hostent *)NULL) { + ++goterr; + continue; + } + memcpy((char *) &sai.sin_addr, (char *) hp->h_addr_list[0], + sizeof(struct in_addr)); + } +#ifdef CONFIG_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; #ifdef CONFIG_FEATURE_IFCONFIG_HW } else { /* A_CAST_HOST_COPY_IN_ETHER */ /* This is the "hw" arg case. */ if (strcmp("ether", *argv) || (*++argv == NULL)) { - show_usage(); + bb_show_usage(); } safe_strncpy(host, *argv, (sizeof host)); if (in_ether(host, &sa)) { - error_msg("invalid hw-addr %s", host); + bb_error_msg("invalid hw-addr %s", host); ++goterr; continue; } @@ -434,7 +472,7 @@ int ifconfig_main(int argc, char **argv) memcpy((((char *) (&ifr)) + a1op->ifr_offset), p, sizeof(struct sockaddr)); } else { - unsigned int i = strtoul(*argv, NULL, 0); + unsigned long i = strtoul(*argv, NULL, 0); p = ((char *) (&ifr)) + a1op->ifr_offset; #ifdef CONFIG_FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ @@ -471,7 +509,7 @@ int ifconfig_main(int argc, char **argv) * 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. + * it'll go with the cross-platform support etc. */ char *ptr; short int found_colon = 0; @@ -513,6 +551,7 @@ int ifconfig_main(int argc, char **argv) continue; } /* end of while-loop */ + if (ENABLE_FEATURE_CLEAN_UP) close(sockfd); return goterr; } @@ -520,7 +559,7 @@ int ifconfig_main(int argc, char **argv) /* Input an Ethernet address and convert to binary. */ static int in_ether(char *bufp, struct sockaddr *sap) { - unsigned char *ptr; + char *ptr; int i, j; unsigned char val; unsigned char c; @@ -528,22 +567,21 @@ static int in_ether(char *bufp, struct sockaddr *sap) sap->sa_family = ARPHRD_ETHER; ptr = sap->sa_data; - for (i = 0; i < ETH_ALEN; i++) { - val = 0; + i = 0; + do { + j = val = 0; /* We might get a semicolon here - not required. */ if (i && (*bufp == ':')) { bufp++; } - for (j = 0; j < 2; j++) { + do { c = *bufp; - if (c >= '0' && c <= '9') { + if (((unsigned char)(c - '0')) <= 9) { c -= '0'; - } else if (c >= 'a' && c <= 'f') { - c -= ('a' - 10); - } else if (c >= 'A' && c <= 'F') { - c -= ('A' - 10); + } else if (((unsigned char)((c|0x20) - 'a')) <= 5) { + c = (c|0x20) - ('a'-10); } else if (j && (c == ':' || c == 0)) { break; } else { @@ -552,9 +590,9 @@ static int in_ether(char *bufp, struct sockaddr *sap) ++bufp; val <<= 4; val += c; - } + } while (++j < 2); *ptr++ = val; - } + } while (++i < ETH_ALEN); return (int) (*bufp); /* Error if we don't end at end of string. */ }