diff options
Diffstat (limited to 'networking/libiproute/ipaddress.c')
| -rw-r--r-- | networking/libiproute/ipaddress.c | 784 |
1 files changed, 784 insertions, 0 deletions
diff --git a/networking/libiproute/ipaddress.c b/networking/libiproute/ipaddress.c new file mode 100644 index 0000000..288dcca --- /dev/null +++ b/networking/libiproute/ipaddress.c @@ -0,0 +1,784 @@ +/* vi: set sw=4 ts=4: */ +/* + * ipaddress.c "ip address". + * + * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. + * + * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> + * + * Changes: + * Laszlo Valko <valko@linux.karinthy.hu> 990223: address label must be zero terminated + */ + +#include <fnmatch.h> +#include <net/if.h> +#include <net/if_arp.h> + +#include "ip_common.h" /* #include "libbb.h" is inside */ +#include "rt_names.h" +#include "utils.h" + +#ifndef IFF_LOWER_UP +/* from linux/if.h */ +#define IFF_LOWER_UP 0x10000 /* driver signals L1 up*/ +#endif + +typedef struct filter_t { + char *label; + char *flushb; + struct rtnl_handle *rth; + int scope, scopemask; + int flags, flagmask; + int flushp; + int flushe; + int ifindex; + family_t family; + smallint showqueue; + smallint oneline; + smallint up; + smallint flushed; + inet_prefix pfx; +} filter_t; + +#define filter (*(filter_t*)&bb_common_bufsiz1) + + +static void print_link_flags(unsigned flags, unsigned mdown) +{ + static const int flag_masks[] = { + IFF_LOOPBACK, IFF_BROADCAST, IFF_POINTOPOINT, + IFF_MULTICAST, IFF_NOARP, IFF_UP, IFF_LOWER_UP }; + static const char flag_labels[] ALIGN1 = + "LOOPBACK\0""BROADCAST\0""POINTOPOINT\0" + "MULTICAST\0""NOARP\0""UP\0""LOWER_UP\0"; + + bb_putchar('<'); + flags &= ~IFF_RUNNING; +#if 0 + _PF(ALLMULTI); + _PF(PROMISC); + _PF(MASTER); + _PF(SLAVE); + _PF(DEBUG); + _PF(DYNAMIC); + _PF(AUTOMEDIA); + _PF(PORTSEL); + _PF(NOTRAILERS); +#endif + flags = print_flags_separated(flag_masks, flag_labels, flags, ","); + if (flags) + printf("%x", flags); + if (mdown) + printf(",M-DOWN"); + printf("> "); +} + +static void print_queuelen(char *name) +{ + struct ifreq ifr; + int s; + + s = socket(AF_INET, SOCK_STREAM, 0); + if (s < 0) + return; + + memset(&ifr, 0, sizeof(ifr)); + strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name)); + if (ioctl_or_warn(s, SIOCGIFTXQLEN, &ifr) < 0) { + close(s); + return; + } + close(s); + + if (ifr.ifr_qlen) + printf("qlen %d", ifr.ifr_qlen); +} + +static int print_linkinfo(const struct nlmsghdr *n) +{ + struct ifinfomsg *ifi = NLMSG_DATA(n); + struct rtattr * tb[IFLA_MAX+1]; + int len = n->nlmsg_len; + unsigned m_flag = 0; + + if (n->nlmsg_type != RTM_NEWLINK && n->nlmsg_type != RTM_DELLINK) + return 0; + + len -= NLMSG_LENGTH(sizeof(*ifi)); + if (len < 0) + return -1; + + if (filter.ifindex && ifi->ifi_index != filter.ifindex) + return 0; + if (filter.up && !(ifi->ifi_flags & IFF_UP)) + return 0; + + memset(tb, 0, sizeof(tb)); + parse_rtattr(tb, IFLA_MAX, IFLA_RTA(ifi), len); + if (tb[IFLA_IFNAME] == NULL) { + bb_error_msg("nil ifname"); + return -1; + } + if (filter.label + && (!filter.family || filter.family == AF_PACKET) + && fnmatch(filter.label, RTA_DATA(tb[IFLA_IFNAME]), 0) + ) { + return 0; + } + + if (n->nlmsg_type == RTM_DELLINK) + printf("Deleted "); + + printf("%d: %s", ifi->ifi_index, + tb[IFLA_IFNAME] ? (char*)RTA_DATA(tb[IFLA_IFNAME]) : "<nil>"); + + if (tb[IFLA_LINK]) { + SPRINT_BUF(b1); + int iflink = *(int*)RTA_DATA(tb[IFLA_LINK]); + if (iflink == 0) + printf("@NONE: "); + else { + printf("@%s: ", ll_idx_n2a(iflink, b1)); + m_flag = ll_index_to_flags(iflink); + m_flag = !(m_flag & IFF_UP); + } + } else { + printf(": "); + } + print_link_flags(ifi->ifi_flags, m_flag); + + if (tb[IFLA_MTU]) + printf("mtu %u ", *(int*)RTA_DATA(tb[IFLA_MTU])); + if (tb[IFLA_QDISC]) + printf("qdisc %s ", (char*)RTA_DATA(tb[IFLA_QDISC])); +#ifdef IFLA_MASTER + if (tb[IFLA_MASTER]) { + SPRINT_BUF(b1); + printf("master %s ", ll_idx_n2a(*(int*)RTA_DATA(tb[IFLA_MASTER]), b1)); + } +#endif + if (filter.showqueue) + print_queuelen((char*)RTA_DATA(tb[IFLA_IFNAME])); + + if (!filter.family || filter.family == AF_PACKET) { + SPRINT_BUF(b1); + printf("%c link/%s ", _SL_, ll_type_n2a(ifi->ifi_type, b1, sizeof(b1))); + + if (tb[IFLA_ADDRESS]) { + fputs(ll_addr_n2a(RTA_DATA(tb[IFLA_ADDRESS]), + RTA_PAYLOAD(tb[IFLA_ADDRESS]), + ifi->ifi_type, + b1, sizeof(b1)), stdout); + } + if (tb[IFLA_BROADCAST]) { + if (ifi->ifi_flags & IFF_POINTOPOINT) + printf(" peer "); + else + printf(" brd "); + fputs(ll_addr_n2a(RTA_DATA(tb[IFLA_BROADCAST]), + RTA_PAYLOAD(tb[IFLA_BROADCAST]), + ifi->ifi_type, + b1, sizeof(b1)), stdout); + } + } + bb_putchar('\n'); + /*fflush(stdout);*/ + return 0; +} + +static int flush_update(void) +{ + if (rtnl_send(filter.rth, filter.flushb, filter.flushp) < 0) { + bb_perror_msg("failed to send flush request"); + return -1; + } + filter.flushp = 0; + return 0; +} + +static int print_addrinfo(const struct sockaddr_nl *who UNUSED_PARAM, + struct nlmsghdr *n, void *arg UNUSED_PARAM) +{ + struct ifaddrmsg *ifa = NLMSG_DATA(n); + int len = n->nlmsg_len; + struct rtattr * rta_tb[IFA_MAX+1]; + char abuf[256]; + SPRINT_BUF(b1); + + if (n->nlmsg_type != RTM_NEWADDR && n->nlmsg_type != RTM_DELADDR) + return 0; + len -= NLMSG_LENGTH(sizeof(*ifa)); + if (len < 0) { + bb_error_msg("wrong nlmsg len %d", len); + return -1; + } + + if (filter.flushb && n->nlmsg_type != RTM_NEWADDR) + return 0; + + memset(rta_tb, 0, sizeof(rta_tb)); + parse_rtattr(rta_tb, IFA_MAX, IFA_RTA(ifa), n->nlmsg_len - NLMSG_LENGTH(sizeof(*ifa))); + + if (!rta_tb[IFA_LOCAL]) + rta_tb[IFA_LOCAL] = rta_tb[IFA_ADDRESS]; + if (!rta_tb[IFA_ADDRESS]) + rta_tb[IFA_ADDRESS] = rta_tb[IFA_LOCAL]; + + if (filter.ifindex && filter.ifindex != ifa->ifa_index) + return 0; + if ((filter.scope ^ ifa->ifa_scope) & filter.scopemask) + return 0; + if ((filter.flags ^ ifa->ifa_flags) & filter.flagmask) + return 0; + if (filter.label) { + const char *label; + if (rta_tb[IFA_LABEL]) + label = RTA_DATA(rta_tb[IFA_LABEL]); + else + label = ll_idx_n2a(ifa->ifa_index, b1); + if (fnmatch(filter.label, label, 0) != 0) + return 0; + } + if (filter.pfx.family) { + if (rta_tb[IFA_LOCAL]) { + inet_prefix dst; + memset(&dst, 0, sizeof(dst)); + dst.family = ifa->ifa_family; + memcpy(&dst.data, RTA_DATA(rta_tb[IFA_LOCAL]), RTA_PAYLOAD(rta_tb[IFA_LOCAL])); + if (inet_addr_match(&dst, &filter.pfx, filter.pfx.bitlen)) + return 0; + } + } + + if (filter.flushb) { + struct nlmsghdr *fn; + if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) { + if (flush_update()) + return -1; + } + fn = (struct nlmsghdr*)(filter.flushb + NLMSG_ALIGN(filter.flushp)); + memcpy(fn, n, n->nlmsg_len); + fn->nlmsg_type = RTM_DELADDR; + fn->nlmsg_flags = NLM_F_REQUEST; + fn->nlmsg_seq = ++filter.rth->seq; + filter.flushp = (((char*)fn) + n->nlmsg_len) - filter.flushb; + filter.flushed = 1; + return 0; + } + + if (n->nlmsg_type == RTM_DELADDR) + printf("Deleted "); + + if (filter.oneline) + printf("%u: %s", ifa->ifa_index, ll_index_to_name(ifa->ifa_index)); + if (ifa->ifa_family == AF_INET) + printf(" inet "); + else if (ifa->ifa_family == AF_INET6) + printf(" inet6 "); + else + printf(" family %d ", ifa->ifa_family); + + if (rta_tb[IFA_LOCAL]) { + fputs(rt_addr_n2a(ifa->ifa_family, + RTA_PAYLOAD(rta_tb[IFA_LOCAL]), + RTA_DATA(rta_tb[IFA_LOCAL]), + abuf, sizeof(abuf)), stdout); + + if (rta_tb[IFA_ADDRESS] == NULL || + memcmp(RTA_DATA(rta_tb[IFA_ADDRESS]), RTA_DATA(rta_tb[IFA_LOCAL]), 4) == 0) { + printf("/%d ", ifa->ifa_prefixlen); + } else { + printf(" peer %s/%d ", + rt_addr_n2a(ifa->ifa_family, + RTA_PAYLOAD(rta_tb[IFA_ADDRESS]), + RTA_DATA(rta_tb[IFA_ADDRESS]), + abuf, sizeof(abuf)), + ifa->ifa_prefixlen); + } + } + + if (rta_tb[IFA_BROADCAST]) { + printf("brd %s ", + rt_addr_n2a(ifa->ifa_family, + RTA_PAYLOAD(rta_tb[IFA_BROADCAST]), + RTA_DATA(rta_tb[IFA_BROADCAST]), + abuf, sizeof(abuf))); + } + if (rta_tb[IFA_ANYCAST]) { + printf("any %s ", + rt_addr_n2a(ifa->ifa_family, + RTA_PAYLOAD(rta_tb[IFA_ANYCAST]), + RTA_DATA(rta_tb[IFA_ANYCAST]), + abuf, sizeof(abuf))); + } + printf("scope %s ", rtnl_rtscope_n2a(ifa->ifa_scope, b1, sizeof(b1))); + if (ifa->ifa_flags & IFA_F_SECONDARY) { + ifa->ifa_flags &= ~IFA_F_SECONDARY; + printf("secondary "); + } + if (ifa->ifa_flags & IFA_F_TENTATIVE) { + ifa->ifa_flags &= ~IFA_F_TENTATIVE; + printf("tentative "); + } + if (ifa->ifa_flags & IFA_F_DEPRECATED) { + ifa->ifa_flags &= ~IFA_F_DEPRECATED; + printf("deprecated "); + } + if (!(ifa->ifa_flags & IFA_F_PERMANENT)) { + printf("dynamic "); + } else + ifa->ifa_flags &= ~IFA_F_PERMANENT; + if (ifa->ifa_flags) + printf("flags %02x ", ifa->ifa_flags); + if (rta_tb[IFA_LABEL]) + fputs((char*)RTA_DATA(rta_tb[IFA_LABEL]), stdout); + if (rta_tb[IFA_CACHEINFO]) { + struct ifa_cacheinfo *ci = RTA_DATA(rta_tb[IFA_CACHEINFO]); + char buf[128]; + bb_putchar(_SL_); + if (ci->ifa_valid == 0xFFFFFFFFU) + sprintf(buf, "valid_lft forever"); + else + sprintf(buf, "valid_lft %dsec", ci->ifa_valid); + if (ci->ifa_prefered == 0xFFFFFFFFU) + sprintf(buf+strlen(buf), " preferred_lft forever"); + else + sprintf(buf+strlen(buf), " preferred_lft %dsec", ci->ifa_prefered); + printf(" %s", buf); + } + bb_putchar('\n'); + /*fflush(stdout);*/ + return 0; +} + + +struct nlmsg_list +{ + struct nlmsg_list *next; + struct nlmsghdr h; +}; + +static int print_selected_addrinfo(int ifindex, struct nlmsg_list *ainfo) +{ + for (; ainfo; ainfo = ainfo->next) { + struct nlmsghdr *n = &ainfo->h; + struct ifaddrmsg *ifa = NLMSG_DATA(n); + + if (n->nlmsg_type != RTM_NEWADDR) + continue; + + if (n->nlmsg_len < NLMSG_LENGTH(sizeof(ifa))) + return -1; + + if (ifa->ifa_index != ifindex || + (filter.family && filter.family != ifa->ifa_family)) + continue; + + print_addrinfo(NULL, n, NULL); + } + return 0; +} + + +static int store_nlmsg(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg) +{ + struct nlmsg_list **linfo = (struct nlmsg_list**)arg; + struct nlmsg_list *h; + struct nlmsg_list **lp; + + h = malloc(n->nlmsg_len+sizeof(void*)); + if (h == NULL) + return -1; + + memcpy(&h->h, n, n->nlmsg_len); + h->next = NULL; + + for (lp = linfo; *lp; lp = &(*lp)->next) + continue; + *lp = h; + + ll_remember_index(who, n, NULL); + return 0; +} + +static void ipaddr_reset_filter(int _oneline) +{ + memset(&filter, 0, sizeof(filter)); + filter.oneline = _oneline; +} + +/* Return value becomes exitcode. It's okay to not return at all */ +int ipaddr_list_or_flush(char **argv, int flush) +{ + static const char option[] ALIGN1 = "to\0""scope\0""up\0""label\0""dev\0"; + + struct nlmsg_list *linfo = NULL; + struct nlmsg_list *ainfo = NULL; + struct nlmsg_list *l; + struct rtnl_handle rth; + char *filter_dev = NULL; + int no_link = 0; + + ipaddr_reset_filter(oneline); + filter.showqueue = 1; + + if (filter.family == AF_UNSPEC) + filter.family = preferred_family; + + if (flush) { + if (!*argv) { + bb_error_msg_and_die(bb_msg_requires_arg, "flush"); + } + if (filter.family == AF_PACKET) { + bb_error_msg_and_die("cannot flush link addresses"); + } + } + + while (*argv) { + const int option_num = index_in_strings(option, *argv); + switch (option_num) { + case 0: /* to */ + NEXT_ARG(); + get_prefix(&filter.pfx, *argv, filter.family); + if (filter.family == AF_UNSPEC) { + filter.family = filter.pfx.family; + } + break; + case 1: /* scope */ + { + uint32_t scope = 0; + NEXT_ARG(); + filter.scopemask = -1; + if (rtnl_rtscope_a2n(&scope, *argv)) { + if (strcmp(*argv, "all") != 0) { + invarg(*argv, "scope"); + } + scope = RT_SCOPE_NOWHERE; + filter.scopemask = 0; + } + filter.scope = scope; + break; + } + case 2: /* up */ + filter.up = 1; + break; + case 3: /* label */ + NEXT_ARG(); + filter.label = *argv; + break; + case 4: /* dev */ + NEXT_ARG(); + default: + if (filter_dev) { + duparg2("dev", *argv); + } + filter_dev = *argv; + } + argv++; + } + + xrtnl_open(&rth); + + xrtnl_wilddump_request(&rth, preferred_family, RTM_GETLINK); + xrtnl_dump_filter(&rth, store_nlmsg, &linfo); + + if (filter_dev) { + filter.ifindex = xll_name_to_index(filter_dev); + } + + if (flush) { + char flushb[4096-512]; + + filter.flushb = flushb; + filter.flushp = 0; + filter.flushe = sizeof(flushb); + filter.rth = &rth; + + for (;;) { + xrtnl_wilddump_request(&rth, filter.family, RTM_GETADDR); + filter.flushed = 0; + xrtnl_dump_filter(&rth, print_addrinfo, NULL); + if (filter.flushed == 0) { + return 0; + } + if (flush_update() < 0) + return 1; + } + } + + if (filter.family != AF_PACKET) { + xrtnl_wilddump_request(&rth, filter.family, RTM_GETADDR); + xrtnl_dump_filter(&rth, store_nlmsg, &ainfo); + } + + + if (filter.family && filter.family != AF_PACKET) { + struct nlmsg_list **lp; + lp = &linfo; + + if (filter.oneline) + no_link = 1; + + while ((l = *lp) != NULL) { + int ok = 0; + struct ifinfomsg *ifi = NLMSG_DATA(&l->h); + struct nlmsg_list *a; + + for (a = ainfo; a; a = a->next) { + struct nlmsghdr *n = &a->h; + struct ifaddrmsg *ifa = NLMSG_DATA(n); + + if (ifa->ifa_index != ifi->ifi_index || + (filter.family && filter.family != ifa->ifa_family)) + continue; + if ((filter.scope ^ ifa->ifa_scope) & filter.scopemask) + continue; + if ((filter.flags ^ ifa->ifa_flags) & filter.flagmask) + continue; + if (filter.pfx.family || filter.label) { + struct rtattr *tb[IFA_MAX+1]; + memset(tb, 0, sizeof(tb)); + parse_rtattr(tb, IFA_MAX, IFA_RTA(ifa), IFA_PAYLOAD(n)); + if (!tb[IFA_LOCAL]) + tb[IFA_LOCAL] = tb[IFA_ADDRESS]; + + if (filter.pfx.family && tb[IFA_LOCAL]) { + inet_prefix dst; + memset(&dst, 0, sizeof(dst)); + dst.family = ifa->ifa_family; + memcpy(&dst.data, RTA_DATA(tb[IFA_LOCAL]), RTA_PAYLOAD(tb[IFA_LOCAL])); + if (inet_addr_match(&dst, &filter.pfx, filter.pfx.bitlen)) + continue; + } + if (filter.label) { + SPRINT_BUF(b1); + const char *label; + if (tb[IFA_LABEL]) + label = RTA_DATA(tb[IFA_LABEL]); + else + label = ll_idx_n2a(ifa->ifa_index, b1); + if (fnmatch(filter.label, label, 0) != 0) + continue; + } + } + + ok = 1; + break; + } + if (!ok) + *lp = l->next; + else + lp = &l->next; + } + } + + for (l = linfo; l; l = l->next) { + if (no_link || print_linkinfo(&l->h) == 0) { + struct ifinfomsg *ifi = NLMSG_DATA(&l->h); + if (filter.family != AF_PACKET) + print_selected_addrinfo(ifi->ifi_index, ainfo); + } + } + + return 0; +} + +static int default_scope(inet_prefix *lcl) +{ + if (lcl->family == AF_INET) { + if (lcl->bytelen >= 1 && *(uint8_t*)&lcl->data == 127) + return RT_SCOPE_HOST; + } + return 0; +} + +/* Return value becomes exitcode. It's okay to not return at all */ +static int ipaddr_modify(int cmd, char **argv) +{ + static const char option[] ALIGN1 = + "peer\0""remote\0""broadcast\0""brd\0" + "anycast\0""scope\0""dev\0""label\0""local\0"; + struct rtnl_handle rth; + struct { + struct nlmsghdr n; + struct ifaddrmsg ifa; + char buf[256]; + } req; + char *d = NULL; + char *l = NULL; + inet_prefix lcl; + inet_prefix peer; + int local_len = 0; + int peer_len = 0; + int brd_len = 0; + int any_len = 0; + bool scoped = 0; + + memset(&req, 0, sizeof(req)); + + req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg)); + req.n.nlmsg_flags = NLM_F_REQUEST; + req.n.nlmsg_type = cmd; + req.ifa.ifa_family = preferred_family; + + while (*argv) { + const int option_num = index_in_strings(option, *argv); + switch (option_num) { + case 0: /* peer */ + case 1: /* remote */ + NEXT_ARG(); + + if (peer_len) { + duparg("peer", *argv); + } + get_prefix(&peer, *argv, req.ifa.ifa_family); + peer_len = peer.bytelen; + if (req.ifa.ifa_family == AF_UNSPEC) { + req.ifa.ifa_family = peer.family; + } + addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &peer.data, peer.bytelen); + req.ifa.ifa_prefixlen = peer.bitlen; + break; + case 2: /* broadcast */ + case 3: /* brd */ + { + inet_prefix addr; + NEXT_ARG(); + if (brd_len) { + duparg("broadcast", *argv); + } + if (LONE_CHAR(*argv, '+')) { + brd_len = -1; + } else if (LONE_DASH(*argv)) { + brd_len = -2; + } else { + get_addr(&addr, *argv, req.ifa.ifa_family); + if (req.ifa.ifa_family == AF_UNSPEC) + req.ifa.ifa_family = addr.family; + addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &addr.data, addr.bytelen); + brd_len = addr.bytelen; + } + break; + } + case 4: /* anycast */ + { + inet_prefix addr; + NEXT_ARG(); + if (any_len) { + duparg("anycast", *argv); + } + get_addr(&addr, *argv, req.ifa.ifa_family); + if (req.ifa.ifa_family == AF_UNSPEC) { + req.ifa.ifa_family = addr.family; + } + addattr_l(&req.n, sizeof(req), IFA_ANYCAST, &addr.data, addr.bytelen); + any_len = addr.bytelen; + break; + } + case 5: /* scope */ + { + uint32_t scope = 0; + NEXT_ARG(); + if (rtnl_rtscope_a2n(&scope, *argv)) { + invarg(*argv, "scope"); + } + req.ifa.ifa_scope = scope; + scoped = 1; + break; + } + case 6: /* dev */ + NEXT_ARG(); + d = *argv; + break; + case 7: /* label */ + NEXT_ARG(); + l = *argv; + addattr_l(&req.n, sizeof(req), IFA_LABEL, l, strlen(l)+1); + break; + case 8: /* local */ + NEXT_ARG(); + default: + if (local_len) { + duparg2("local", *argv); + } + get_prefix(&lcl, *argv, req.ifa.ifa_family); + if (req.ifa.ifa_family == AF_UNSPEC) { + req.ifa.ifa_family = lcl.family; + } + addattr_l(&req.n, sizeof(req), IFA_LOCAL, &lcl.data, lcl.bytelen); + local_len = lcl.bytelen; + } + argv++; + } + + if (d == NULL) { + bb_error_msg(bb_msg_requires_arg, "\"dev\""); + return -1; + } + if (l && strncmp(d, l, strlen(d)) != 0) { + bb_error_msg_and_die("\"dev\" (%s) must match \"label\" (%s)", d, l); + } + + if (peer_len == 0 && local_len && cmd != RTM_DELADDR) { + peer = lcl; + addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &lcl.data, lcl.bytelen); + } + if (req.ifa.ifa_prefixlen == 0) + req.ifa.ifa_prefixlen = lcl.bitlen; + + if (brd_len < 0 && cmd != RTM_DELADDR) { + inet_prefix brd; + int i; + if (req.ifa.ifa_family != AF_INET) { + bb_error_msg_and_die("broadcast can be set only for IPv4 addresses"); + } + brd = peer; + if (brd.bitlen <= 30) { + for (i=31; i>=brd.bitlen; i--) { + if (brd_len == -1) + brd.data[0] |= htonl(1<<(31-i)); + else + brd.data[0] &= ~htonl(1<<(31-i)); + } + addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &brd.data, brd.bytelen); + brd_len = brd.bytelen; + } + } + if (!scoped && cmd != RTM_DELADDR) + req.ifa.ifa_scope = default_scope(&lcl); + + xrtnl_open(&rth); + + ll_init_map(&rth); + + req.ifa.ifa_index = xll_name_to_index(d); + + if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0) + return 2; + + return 0; +} + +/* Return value becomes exitcode. It's okay to not return at all */ +int do_ipaddr(char **argv) +{ + static const char commands[] ALIGN1 = + "add\0""delete\0""list\0""show\0""lst\0""flush\0"; + + int command_num = 2; /* default command is list */ + + if (*argv) { + command_num = index_in_substrings(commands, *argv); + if (command_num < 0 || command_num > 5) + bb_error_msg_and_die("unknown command %s", *argv); + argv++; + } + if (command_num == 0) /* add */ + return ipaddr_modify(RTM_NEWADDR, argv); + if (command_num == 1) /* delete */ + return ipaddr_modify(RTM_DELADDR, argv); + if (command_num == 5) /* flush */ + return ipaddr_list_or_flush(argv, 1); + /* 2 == list, 3 == show, 4 == lst */ + return ipaddr_list_or_flush(argv, 0); +} |