diff options
Diffstat (limited to 'ifconfig.c')
| -rw-r--r-- | ifconfig.c | 711 |
1 files changed, 382 insertions, 329 deletions
@@ -15,19 +15,26 @@ * Foundation; either version 2 of the License, or (at * your option) any later version. * - * $Id: ifconfig.c,v 1.4 2001/03/06 00:48:59 andersen Exp $ + * $Id: ifconfig.c,v 1.5 2001/03/08 22:57:00 mjn3 Exp $ * - * Majorly hacked up by Larry Doolittle <ldoolitt@recycle.lbl.gov> + */ + +/* + * 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. */ -#include "busybox.h" -#include <sys/types.h> #include <stdio.h> #include <stdlib.h> -#include <errno.h> #include <string.h> // strcmp and friends #include <ctype.h> // isdigit and friends +#include <stddef.h> /* offsetof */ +#include <sys/types.h> #include <sys/socket.h> #include <sys/ioctl.h> #include <netinet/in.h> @@ -35,397 +42,443 @@ #include <net/if.h> #include <net/if_arp.h> #include <linux/if_ether.h> +#include "busybox.h" -static int sockfd; /* socket fd we use to manipulate stuff with */ +#ifdef BB_FEATURE_IFCONFIG_SLIP +#include <linux/if_slip.h> +#endif -#define TESTME 0 -#if TESTME -#define ioctl test_ioctl -char *saddr_to_a(struct sockaddr *s) -{ - if (s->sa_family == ARPHRD_ETHER) { - static char hw[18]; - sprintf(hw, "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x", - s->sa_data[0], s->sa_data[1], s->sa_data[2], - s->sa_data[3], s->sa_data[4], s->sa_data[5]); - return hw; - } else if (s->sa_family == AF_INET) { - struct sockaddr_in *ss = (struct sockaddr_in *) s; - return inet_ntoa(ss->sin_addr); - } else { - return NULL; - } -} +/* I don't know if this is needed for busybox or not. Anyone? */ +#define QUESTIONABLE_ALIAS_CASE -int test_ioctl(int __fd, unsigned long int __request, void *param) -{ - struct ifreq *i=(struct ifreq *)param; - printf("ioctl fd=%d, request=%ld\n", __fd, __request); - - switch(__request) { - case SIOCGIFFLAGS: printf(" SIOCGIFFLAGS\n"); i->ifr_flags = 0; break; - case SIOCSIFFLAGS: printf(" SIOCSIFFLAGS, %x\n", i->ifr_flags); break; - case SIOCSIFMETRIC: printf(" SIOCSIFMETRIC, %d\n", i->ifr_metric); break; - case SIOCSIFMTU: printf(" SIOCSIFMTU, %d\n", i->ifr_mtu); break; - case SIOCSIFBRDADDR: printf(" SIOCSIFBRDADDR, %s\n", saddr_to_a(&(i->ifr_broadaddr))); break; - case SIOCSIFDSTADDR: printf(" SIOCSIFDSTADDR, %s\n", saddr_to_a(&(i->ifr_dstaddr ))); break; - case SIOCSIFNETMASK: printf(" SIOCSIFNETMASK, %s\n", saddr_to_a(&(i->ifr_netmask ))); break; - case SIOCSIFADDR: printf(" SIOCSIFADDR, %s\n", saddr_to_a(&(i->ifr_addr ))); break; - case SIOCSIFHWADDR: printf(" SIOCSIFHWADDR, %s\n", saddr_to_a(&(i->ifr_hwaddr ))); break; /* broken */ - default: - } - return 0; -} + +/* 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 -/* print usage and exit */ +#ifndef IFF_DYNAMIC +#define IFF_DYNAMIC 0x8000 /* dialup device with changing addresses */ +#endif -#define _(x) x +/* + * 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. + */ -/* Set a certain interface flag. */ -static int -set_flag(char *ifname, short flag) -{ - struct ifreq ifr; - - strcpy(ifr.ifr_name, ifname); - if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) { - perror("SIOCGIFFLAGS"); - return -1; - } - strcpy(ifr.ifr_name, ifname); - ifr.ifr_flags |= flag; - if (ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0) { - perror("SIOCSIFFLAGS"); - return -1; - } - return 0; -} +/* + * 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. */ + +/* + * 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. + */ -/* Clear a certain interface flag. */ -static int -clr_flag(char *ifname, short flag) -{ - struct ifreq ifr; - - strcpy(ifr.ifr_name, ifname); - if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) { - perror("SIOCGIFFLAGS"); - return -1; - } - strcpy(ifr.ifr_name, ifname); - ifr.ifr_flags &= ~flag; - if (ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0) { - perror("SIOCSIFFLAGS"); - return -1; - } - return 0; -} +#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_USHORT) +#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_HW (A_ARG_REQ | A_CAST_HOST_COPY_IN_ETHER) +#define ARG_POINTOPOINT (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) + + +/* + * Set up the tables. Warning! They must have corresponding order! + */ -/* which element in struct ifreq to frob */ -enum frob { - L_METRIC, - L_MTU, - L_DATA, - L_BROAD, - L_DEST, - L_MASK, - L_HWAD, +struct arg1opt { + const char *name; + unsigned short selector; + unsigned short ifr_offset; }; - -struct flag_map { - char *name; - enum frob frob; - int flag; - int sflag; - int action; +struct options { + const char *name; + const unsigned char flags; + const unsigned char arg_flags; + const unsigned short selector; }; -/* action: - * 2 set - * 4 clear - * 6 set/clear - * 8 clear/set - * 10 numeric - * 12 address - * 14 address/clear - */ -const static struct flag_map flag_table[] = { - {"arp", 0, IFF_NOARP, 0, 6}, - {"trailers", 0, IFF_NOTRAILERS, 0, 6}, - {"promisc", 0, IFF_PROMISC, 0, 8}, - {"multicast", 0, IFF_MULTICAST, 0, 8}, - {"allmulti", 0, IFF_ALLMULTI, 0, 8}, - {"up", 0, (IFF_UP | IFF_RUNNING), 0, 2}, - {"down", 0, IFF_UP, 0, 4}, - {"metric", L_METRIC, 0, SIOCSIFMETRIC, 10}, - {"mtu", L_MTU, 0, SIOCSIFMTU, 10}, +#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)}, + {"SIOCSIFDSTADDR", SIOCSIFDSTADDR, ifreq_offsetof(ifr_dstaddr)}, + {"SIOCSIFNETMASK", SIOCSIFNETMASK, ifreq_offsetof(ifr_netmask)}, + {"SIOCSIFBRDADDR", SIOCSIFBRDADDR, ifreq_offsetof(ifr_broadaddr)}, +#ifdef BB_FEATURE_IFCONFIG_HW + {"SIOCSIFHWADDR", SIOCSIFHWADDR, ifreq_offsetof(ifr_hwaddr)}, +#endif + {"SIOCSIFDSTADDR", SIOCSIFDSTADDR, ifreq_offsetof(ifr_dstaddr)}, #ifdef SIOCSKEEPALIVE - {"keepalive", L_DATA, 0, SIOCSKEEPALIVE, 10}, + {"SIOCSKEEPALIVE", SIOCSKEEPALIVE, ifreq_offsetof(ifr_data)}, #endif #ifdef SIOCSOUTFILL - {"outfill", L_DATA, 0, SIOCSOUTFILL, 10}, + {"SIOCSOUTFILL", SIOCSOUTFILL, ifreq_offsetof(ifr_data)}, +#endif +#ifdef BB_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)}, #endif - {"broadcast", L_BROAD, IFF_BROADCAST, SIOCSIFBRDADDR, 14}, - {"dstaddr", L_DEST, 0, SIOCSIFDSTADDR, 12}, - {"netmask", L_MASK, 0, SIOCSIFNETMASK, 12}, - {"pointopoint", L_DEST, IFF_POINTOPOINT, SIOCSIFDSTADDR, 14}, - {"hw", L_HWAD, 0, SIOCSIFHWADDR, 14}, + /* Last entry if for unmatched (possibly hostname) arg. */ + {"SIOCSIFADDR", SIOCSIFADDR, ifreq_offsetof(ifr_addr)}, }; - -/* resolve XXX.YYY.ZZZ.QQQ -> binary */ - -static int -INET_resolve(char *name, struct sockaddr_in *sin) -{ - sin->sin_family = AF_INET; - sin->sin_port = 0; - - /* Default is special, meaning 0.0.0.0. */ - if (strcmp(name, "default")==0) { - sin->sin_addr.s_addr = INADDR_ANY; - return 1; - } - /* Look to see if it's a dotted quad. */ - if (inet_aton(name, &sin->sin_addr)) { - return 0; - } - /* guess not.. */ - errno = EINVAL; - return -1; -} - -/* Input an Ethernet address and convert to binary. */ -static int -in_ether(char *bufp, struct sockaddr *sap) -{ - unsigned char *ptr; - char c, *orig; - int i; - unsigned val; - - sap->sa_family = ARPHRD_ETHER; - ptr = sap->sa_data; - - i = 0; - orig = bufp; - while ((*bufp != '\0') && (i < ETH_ALEN)) { - val = 0; - c = *bufp++; - if (isdigit(c)) - val = c - '0'; - else if (c >= 'a' && c <= 'f') - val = c - 'a' + 10; - else if (c >= 'A' && c <= 'F') - val = c - 'A' + 10; - else { -#ifdef DEBUG - error_msg( - _("in_ether(%s): invalid ether address!"), - orig); +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}, +#ifdef BB_FEATURE_IFCONFIG_HW + {"hw", N_ARG, ARG_HW, 0}, #endif - errno = EINVAL; - return -1; - } - val <<= 4; - c = *bufp; - if (isdigit(c)) - val |= c - '0'; - else if (c >= 'a' && c <= 'f') - val |= c - 'a' + 10; - else if (c >= 'A' && c <= 'F') - val |= c - 'A' + 10; - else if (c == ':' || c == 0) - val >>= 4; - else { -#ifdef DEBUG - error_msg( - _("in_ether(%s): invalid ether address!"), - orig); + {"pointopoint", N_ARG | M_CLR, ARG_POINTOPOINT, IFF_POINTOPOINT}, +#ifdef SIOCSKEEPALIVE + {"keepalive", N_ARG, ARG_KEEPALIVE, 0}, #endif - errno = EINVAL; - return -1; - } - if (c != 0) - bufp++; - *ptr++ = (unsigned char) (val & 0377); - i++; - - /* optional colon already handled, don't swallow a second */ - } +#ifdef SIOCSOUTFILL + {"outfill", N_ARG, ARG_OUTFILL, 0}, +#endif +#ifdef BB_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 + {"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)} +}; - if(i != ETH_ALEN) { - errno = EINVAL; - return -1; - } +/* + * A couple of prototypes. + */ + +#ifdef BB_FEATURE_IFCONFIG_HW +static int in_ether(char *bufp, struct sockaddr *sap); +#endif - return 0; -} - #ifdef BB_FEATURE_IFCONFIG_STATUS extern int display_interfaces(void); -#else -int display_interfaces(void) -{ - show_usage(); -} #endif +/* + * Our main function. + */ + int ifconfig_main(int argc, char **argv) { struct ifreq ifr; - struct sockaddr_in sa; - char **spp, *cmd; - int goterr = 0; - int r; - /* int didnetmask = 0; special case input error detection no longer implemented */ + struct sockaddr_in sai; +#ifdef BB_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 goterr; + int selector; + char *p; char host[128]; - const struct flag_map *ft; - int i, sense; - int a, ecode; - struct sockaddr *d; + unsigned char mask; + unsigned char did_flags; + + goterr = 0; + did_flags = 0; if(argc < 2) { +#ifdef BB_FEATURE_IFCONFIG_STATUS return(display_interfaces()); +#else + show_usage(); +#endif } /* Create a channel to the NET kernel. */ if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { - perror_msg_and_die("socket"); + perror("socket"); + exit(1); } /* skip argv[0] */ - argc--; argv++; - spp = argv; - /* get interface name */ - - safe_strncpy(ifr.ifr_name, *spp++, IFNAMSIZ); + safe_strncpy(ifr.ifr_name, *argv, IFNAMSIZ); /* Process the remaining arguments. */ - while (*spp != (char *) NULL) { - cmd = *spp; - sense=0; - if (*cmd=='-') { - sense=1; - cmd++; + while (*++argv != (char *) 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. */ } - ft = NULL; - for (i=0; i<(sizeof(flag_table)/sizeof(struct flag_map)); i++) { - if (strcmp(cmd, flag_table[i].name)==0) { - ft=flag_table+i; - spp++; - break; + for (op = OptArray ; op->name ; op++) { /* Find table entry. */ + if (!strcmp(p,op->name)) { /* If name matches... */ + if ((mask &= op->flags)) { /* set the mask and go. */ + goto FOUND_ARG;; + } + /* If we get here, there was a valid arg with an */ + /* invalid '-' prefix. */ + ++goterr; + goto LOOP; } } - if (ft) { - switch (ft->action+sense) { - case 4: - case 7: - case 8: - case 15: - goterr |= clr_flag(ifr.ifr_name, ft->flag); - break; - case 2: - case 6: - case 9: - goterr |= set_flag(ifr.ifr_name, ft->flag); - break; - case 10: - if (*spp == NULL) + + /* We fell through, so treat as possible hostname. */ + a1op = Arg1Opt + (sizeof(Arg1Opt) / sizeof(Arg1Opt[0])) - 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) { + show_usage(); + } + if (*++argv == NULL) { + if (mask & A_ARG_REQ) { show_usage(); - a = atoi(*spp++); - switch (ft->frob) { - case L_METRIC: ifr.ifr_metric = a; break; - case L_MTU: ifr.ifr_mtu = a; break; - case L_DATA: ifr.ifr_data = (caddr_t) a; break; - default: error_msg_and_die("bugaboo"); + } else { + --argv; + mask &= A_SET_AFTER; /* just for broadcast */ } - - if (ioctl(sockfd, ft->sflag, &ifr) < 0) { - perror(ft->name); /* imperfect */ - goterr++; + } else { /* got an arg so process it */ + HOSTNAME: + did_flags |= (mask & A_NETMASK); + if (mask & A_CAST_HOST_COPY) { +#ifdef BB_FEATURE_IFCONFIG_HW + if (mask & A_CAST_RESOLVE) { +#endif + safe_strncpy(host, *argv, (sizeof host)); + sai.sin_family = AF_INET; + sai.sin_port = 0; + if (!strcmp(host, "default")) { + /* Default is special, meaning 0.0.0.0. */ + sai.sin_addr.s_addr = INADDR_ANY; + } else if (inet_aton(host, &sai.sin_addr) == 0) { + /* It's not a dotted quad. */ + ++goterr; + continue; + } + p = (char *) &sai; +#ifdef BB_FEATURE_IFCONFIG_HW + } else { /* A_CAST_HOST_COPY_IN_ETHER */ + /* This is the "hw" arg case. */ + if (strcmp("ether", *argv) || (*++argv == NULL)) { + show_usage(); + } + safe_strncpy(host, *argv, (sizeof host)); + if (in_ether(host, &sa)) { + fprintf(stderr, "invalid hw-addr %s\n", host); + ++goterr; + continue; + } + p = (char *) &sa; + } +#endif + memcpy((((char *)(&ifr)) + a1op->ifr_offset), + p, sizeof(struct sockaddr)); + } else { + unsigned int i = strtoul(*argv,NULL,0); + p = ((char *)(&ifr)) + a1op->ifr_offset; +#ifdef BB_FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ + if (mask & A_MAP_TYPE) { + if (ioctl(sockfd, SIOCGIFMAP, &ifr) < 0) { + ++goterr; + continue; + } + 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; + } } - break; - case 12: - case 14: - if (ft->action+sense==10 && *spp == NULL) { - show_usage(); - break; + + if (ioctl(sockfd, a1op->selector, &ifr) < 0) { + perror(a1op->name); + ++goterr; + continue; } - if (*spp != NULL) { - safe_strncpy(host, *spp, (sizeof host)); - spp++; - if (ft->frob == L_HWAD) { - ecode = in_ether(host, &ifr.ifr_hwaddr); - } else { - switch (ft->frob) { - case L_BROAD: d = &ifr.ifr_broadaddr; break; - case L_DEST: d = &ifr.ifr_dstaddr; break; - case L_MASK: d = &ifr.ifr_netmask; break; - default: error_msg_and_die("bugaboo"); + +#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++; } - ecode = INET_resolve(host, (struct sockaddr_in *) d); } - if (ecode < 0 || ioctl(sockfd, ft->sflag, &ifr) < 0) { - perror(ft->name); /* imperfect */ - goterr++; + + if (found_colon && *(ptr - 1) == '-') { + continue; } } - if (ft->flag != 0) { - goterr |= set_flag(ifr.ifr_name, ft->flag); - } - break; - default: - show_usage(); - } /* end of switch */ - continue; +#endif + } + if (!(mask & A_SET_AFTER)) { + continue; + } + mask = N_SET; } - - /* If the next argument is a valid hostname, assume OK. */ - safe_strncpy(host, *spp, (sizeof host)); - if (INET_resolve(host, &sa) < 0) { - show_usage(); + if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) { + perror("SIOCGIFFLAGS"); + ++goterr; + } else { + selector = op->selector; + if (mask & SET_MASK) { + ifr.ifr_flags |= selector; + } else { + ifr.ifr_flags &= ~selector; + } + if (ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0) { + perror("SIOCSIFFLAGS"); + ++goterr; + } } - memcpy((char *) &ifr.ifr_addr, - (char *) &sa, sizeof(struct sockaddr)); + LOOP: + } /* end of while-loop */ - r = ioctl(sockfd, SIOCSIFADDR, &ifr); + return goterr; +} - if (r < 0) { - perror("SIOCSIFADDR"); - goterr++; - } +#ifdef BB_FEATURE_IFCONFIG_HW +/* Input an Ethernet address and convert to binary. */ +static int +in_ether(char *bufp, struct sockaddr *sap) +{ + unsigned char *ptr; + int i, j; + unsigned char val; + unsigned char c; + + sap->sa_family = ARPHRD_ETHER; + ptr = sap->sa_data; + + for (i = 0 ; i < ETH_ALEN ; i++) { + val = 0; - /* - * 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) == '-')) - goterr |= set_flag(ifr.ifr_name, (IFF_UP | IFF_RUNNING)); + /* We might get a semicolon here - not required. */ + if (i && (*bufp == ':')) { + bufp++; } - - spp++; - } /* end of while-loop */ + for (j=0 ; j<2 ; j++) { + c = *bufp; + if (c >= '0' && c <= '9') { + c -= '0'; + } else if (c >= 'a' && c <= 'f') { + c -= ('a' + 10); + } else if (c >= 'A' && c <= 'F') { + c -= ('A' + 10); + } else if (j && (c == ':' || c == 0)) { + break; + } else { + return -1; + } + ++bufp; + val <<= 4; + val += c; + } + *ptr++ = val; + } - return goterr; + return (int) (*bufp); /* Error if we don't end at end of string. */ } - +#endif |