diff options
| -rw-r--r-- | networking/ifconfig.c | 162 |
1 files changed, 58 insertions, 104 deletions
diff --git a/networking/ifconfig.c b/networking/ifconfig.c index 05be7dc..d28ca22 100644 --- a/networking/ifconfig.c +++ b/networking/ifconfig.c @@ -279,7 +279,6 @@ int ifconfig_main(int argc, char **argv) const struct arg1opt *a1op; const struct options *op; int sockfd; /* socket fd we use to manipulate stuff with */ - int goterr; int selector; #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS unsigned int mask; @@ -293,7 +292,6 @@ int ifconfig_main(int argc, char **argv) /*char host[128];*/ const char *host = NULL; /* make gcc happy */ - goterr = 0; did_flags = 0; #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS sai_hostname = 0; @@ -305,7 +303,7 @@ int ifconfig_main(int argc, char **argv) --argc; #if ENABLE_FEATURE_IFCONFIG_STATUS - if ((argc > 0) && (((*argv)[0] == '-') && ((*argv)[1] == 'a') && !(*argv)[2])) { + if (argc > 0 && (argv[0][0] == '-' && argv[0][1] == 'a' && !argv[0][2])) { interface_opt_a = 1; --argc; ++argv; @@ -337,13 +335,11 @@ 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... */ mask &= op->flags; - if (mask) { /* set the mask and go. */ + if (mask) /* set the mask and go. */ goto FOUND_ARG; - } /* If we get here, there was a valid arg with an */ /* invalid '-' prefix. */ - ++goterr; - goto LOOP; + bb_error_msg_and_die("bad: '%s'", p-1); } } @@ -356,16 +352,13 @@ int ifconfig_main(int argc, char **argv) if (mask & ARG_MASK) { mask = op->arg_flags; a1op = Arg1Opt + (op - OptArray); - if (mask & A_NETMASK & did_flags) { + if (mask & A_NETMASK & did_flags) bb_show_usage(); - } if (*++argv == NULL) { - if (mask & A_ARG_REQ) { + if (mask & A_ARG_REQ) bb_show_usage(); - } else { - --argv; - mask &= A_SET_AFTER; /* just for broadcast */ - } + --argv; + mask &= A_SET_AFTER; /* just for broadcast */ } else { /* got an arg so process it */ HOSTNAME: did_flags |= (mask & (A_NETMASK|A_HOSTNAME)); @@ -382,121 +375,95 @@ int ifconfig_main(int argc, char **argv) #if ENABLE_FEATURE_IPV6 prefix = strchr(host, '/'); if (prefix) { - if (safe_strtoi(prefix + 1, &prefix_len) || - (prefix_len < 0) || (prefix_len > 128)) - { - ++goterr; - goto LOOP; - } - *prefix = 0; + prefix_len = xatou_range(prefix + 1, 0, 128); + *prefix = '\0'; } #endif - sai.sin_family = AF_INET; sai.sin_port = 0; if (!strcmp(host, bb_str_default)) { /* 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)) { + 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 #if ENABLE_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; memcpy((char *) &ifr6.ifr6_addr, - (char *) &sai6.sin6_addr, - sizeof(struct in6_addr)); + (char *) &sai6.sin6_addr, + sizeof(struct in6_addr)); /* Create a channel to the NET kernel. */ - if ((sockfd6 = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { - bb_perror_msg_and_die("socket6"); - } - if (ioctl(sockfd6, SIOGIFINDEX, &ifr) < 0) { - perror("SIOGIFINDEX"); - ++goterr; - continue; - } + sockfd6 = xsocket(AF_INET6, SOCK_DGRAM, 0); + if (ioctl(sockfd6, SIOGIFINDEX, &ifr) < 0) + bb_perror_msg_and_die("SIOGIFINDEX"); ifr6.ifr6_ifindex = ifr.ifr_ifindex; ifr6.ifr6_prefixlen = prefix_len; - if (ioctl(sockfd6, a1op->selector, &ifr6) < 0) { - perror(a1op->name); - ++goterr; - } + if (ioctl(sockfd6, a1op->selector, &ifr6) < 0) + bb_perror_msg_and_die(a1op->name); continue; + } #endif - } else if (inet_aton(host, &sai.sin_addr) == 0) { + else if (inet_aton(host, &sai.sin_addr) == 0) { /* It's not a dotted quad. */ - struct hostent *hp = gethostbyname(host); - if (!hp) { - ++goterr; - continue; - } + struct hostent *hp = xgethostbyname(host); memcpy((char *) &sai.sin_addr, (char *) hp->h_addr_list[0], sizeof(struct in_addr)); } #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS - if (mask & A_HOSTNAME) { + if (mask & A_HOSTNAME) sai_hostname = sai.sin_addr.s_addr; - } - if (mask & A_NETMASK) { + 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. */ - if (strcmp("ether", *argv) || (*++argv == NULL)) { + if (strcmp("ether", *argv) || !*++argv) bb_show_usage(); - } /*safe_strncpy(host, *argv, sizeof(host));*/ host = *argv; - if (in_ether(host, &sa)) { - bb_error_msg("invalid hw-addr %s", host); - ++goterr; - continue; - } + if (in_ether(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) { - if (ioctl(sockfd, SIOCGIFMAP, &ifr) < 0) { - ++goterr; - continue; - } - if ((mask & A_MAP_UCHAR) == A_MAP_UCHAR) { + if (ioctl(sockfd, SIOCGIFMAP, &ifr) < 0) + bb_perror_msg_and_die("SIOCGIFMAP"); + if ((mask & A_MAP_UCHAR) == A_MAP_UCHAR) *((unsigned char *) p) = i; - } else if (mask & A_MAP_USHORT) { + else if (mask & A_MAP_USHORT) *((unsigned short *) p) = i; - } else { + else *((unsigned long *) p) = i; - } } else #endif - if (mask & A_CAST_CHAR_PTR) { + if (mask & A_CAST_CHAR_PTR) *((caddr_t *) p) = (caddr_t) i; - } else { /* A_CAST_INT */ + else /* A_CAST_INT */ *((int *) p) = i; - } } - if (ioctl(sockfd, a1op->selector, &ifr) < 0) { - perror(a1op->name); - ++goterr; - continue; - } + if (ioctl(sockfd, a1op->selector, &ifr) < 0) + bb_perror_msg_and_die(a1op->name); #ifdef QUESTIONABLE_ALIAS_CASE if (mask & A_COLON_CHK) { /* @@ -508,46 +475,33 @@ int ifconfig_main(int argc, char **argv) */ char *ptr; short int found_colon = 0; - - for (ptr = ifr.ifr_name; *ptr; ptr++) { - if (*ptr == ':') { + for (ptr = ifr.ifr_name; *ptr; ptr++) + if (*ptr == ':') found_colon++; - } - } - - if (found_colon && *(ptr - 1) == '-') { + if (found_colon && ptr[-1] == '-') continue; - } } #endif } - if (!(mask & A_SET_AFTER)) { + if (!(mask & A_SET_AFTER)) continue; - } mask = N_SET; } - 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; - } - } - LOOP: - continue; - } /* end of while-loop */ - - if (ENABLE_FEATURE_CLEAN_UP) close(sockfd); - return goterr; + if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) + bb_perror_msg_and_die("SIOCGIFFLAGS"); + 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"); + } /* while() */ + + if (ENABLE_FEATURE_CLEAN_UP) + close(sockfd); + return 0; } #if ENABLE_FEATURE_IFCONFIG_HW |