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busybox/networking/libiproute/ipaddress.c

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/*
* 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 "libbb.h"
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <fnmatch.h>
#include <string.h>
#include <unistd.h>
#include <net/if.h>
#include <net/if_arp.h>
#include "rt_names.h"
#include "utils.h"
#include "ip_common.h"
static struct
{
int ifindex;
int family;
int oneline;
int showqueue;
inet_prefix pfx;
int scope, scopemask;
int flags, flagmask;
int up;
char *label;
int flushed;
char *flushb;
int flushp;
int flushe;
struct rtnl_handle *rth;
} filter;
static void print_link_flags(FILE *fp, unsigned flags, unsigned mdown)
{
fprintf(fp, "<");
flags &= ~IFF_RUNNING;
#define _PF(f) if (flags&IFF_##f) { \
flags &= ~IFF_##f ; \
fprintf(fp, #f "%s", flags ? "," : ""); }
_PF(LOOPBACK);
_PF(BROADCAST);
_PF(POINTOPOINT);
_PF(MULTICAST);
_PF(NOARP);
#if 0
_PF(ALLMULTI);
_PF(PROMISC);
_PF(MASTER);
_PF(SLAVE);
_PF(DEBUG);
_PF(DYNAMIC);
_PF(AUTOMEDIA);
_PF(PORTSEL);
_PF(NOTRAILERS);
#endif
_PF(UP);
#undef _PF
if (flags)
fprintf(fp, "%x", flags);
if (mdown)
fprintf(fp, ",M-DOWN");
fprintf(fp, "> ");
}
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));
strcpy(ifr.ifr_name, name);
if (ioctl(s, SIOCGIFTXQLEN, &ifr) < 0) {
perror("SIOCGIFXQLEN");
close(s);
return;
}
close(s);
if (ifr.ifr_qlen)
printf("qlen %d", ifr.ifr_qlen);
}
static int print_linkinfo(struct sockaddr_nl ATTRIBUTE_UNUSED *who,
struct nlmsghdr *n, void ATTRIBUTE_UNUSED *arg)
{
FILE *fp = (FILE*)arg;
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)
fprintf(fp, "Deleted ");
fprintf(fp, "%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)
fprintf(fp, "@NONE: ");
else {
fprintf(fp, "@%s: ", ll_idx_n2a(iflink, b1));
m_flag = ll_index_to_flags(iflink);
m_flag = !(m_flag & IFF_UP);
}
} else {
fprintf(fp, ": ");
}
print_link_flags(fp, ifi->ifi_flags, m_flag);
if (tb[IFLA_MTU])
fprintf(fp, "mtu %u ", *(int*)RTA_DATA(tb[IFLA_MTU]));
if (tb[IFLA_QDISC])
fprintf(fp, "qdisc %s ", (char*)RTA_DATA(tb[IFLA_QDISC]));
#ifdef IFLA_MASTER
if (tb[IFLA_MASTER]) {
SPRINT_BUF(b1);
fprintf(fp, "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);
fprintf(fp, "%s", _SL_);
fprintf(fp, " link/%s ", ll_type_n2a(ifi->ifi_type, b1, sizeof(b1)));
if (tb[IFLA_ADDRESS]) {
fprintf(fp, "%s", ll_addr_n2a(RTA_DATA(tb[IFLA_ADDRESS]),
RTA_PAYLOAD(tb[IFLA_ADDRESS]),
ifi->ifi_type,
b1, sizeof(b1)));
}
if (tb[IFLA_BROADCAST]) {
if (ifi->ifi_flags&IFF_POINTOPOINT)
fprintf(fp, " peer ");
else
fprintf(fp, " brd ");
fprintf(fp, "%s", ll_addr_n2a(RTA_DATA(tb[IFLA_BROADCAST]),
RTA_PAYLOAD(tb[IFLA_BROADCAST]),
ifi->ifi_type,
b1, sizeof(b1)));
}
}
fprintf(fp, "\n");
fflush(fp);
return 0;
}
static int flush_update(void)
{
if (rtnl_send(filter.rth, filter.flushb, filter.flushp) < 0) {
perror("Failed to send flush request\n");
return -1;
}
filter.flushp = 0;
return 0;
}
static int print_addrinfo(struct sockaddr_nl ATTRIBUTE_UNUSED *who,
struct nlmsghdr *n, void ATTRIBUTE_UNUSED *arg)
{
FILE *fp = (FILE*)arg;
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++;
return 0;
}
if (n->nlmsg_type == RTM_DELADDR)
fprintf(fp, "Deleted ");
if (filter.oneline)
fprintf(fp, "%u: %s", ifa->ifa_index, ll_index_to_name(ifa->ifa_index));
if (ifa->ifa_family == AF_INET)
fprintf(fp, " inet ");
else if (ifa->ifa_family == AF_INET6)
fprintf(fp, " inet6 ");
else
fprintf(fp, " family %d ", ifa->ifa_family);
if (rta_tb[IFA_LOCAL]) {
fprintf(fp, "%s", rt_addr_n2a(ifa->ifa_family,
RTA_PAYLOAD(rta_tb[IFA_LOCAL]),
RTA_DATA(rta_tb[IFA_LOCAL]),
abuf, sizeof(abuf)));
if (rta_tb[IFA_ADDRESS] == NULL ||
memcmp(RTA_DATA(rta_tb[IFA_ADDRESS]), RTA_DATA(rta_tb[IFA_LOCAL]), 4) == 0) {
fprintf(fp, "/%d ", ifa->ifa_prefixlen);
} else {
fprintf(fp, " 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]) {
fprintf(fp, "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]) {
fprintf(fp, "any %s ",
rt_addr_n2a(ifa->ifa_family,
RTA_PAYLOAD(rta_tb[IFA_ANYCAST]),
RTA_DATA(rta_tb[IFA_ANYCAST]),
abuf, sizeof(abuf)));
}
fprintf(fp, "scope %s ", rtnl_rtscope_n2a(ifa->ifa_scope, b1, sizeof(b1)));
if (ifa->ifa_flags&IFA_F_SECONDARY) {
ifa->ifa_flags &= ~IFA_F_SECONDARY;
fprintf(fp, "secondary ");
}
if (ifa->ifa_flags&IFA_F_TENTATIVE) {
ifa->ifa_flags &= ~IFA_F_TENTATIVE;
fprintf(fp, "tentative ");
}
if (ifa->ifa_flags&IFA_F_DEPRECATED) {
ifa->ifa_flags &= ~IFA_F_DEPRECATED;
fprintf(fp, "deprecated ");
}
if (!(ifa->ifa_flags&IFA_F_PERMANENT)) {
fprintf(fp, "dynamic ");
} else
ifa->ifa_flags &= ~IFA_F_PERMANENT;
if (ifa->ifa_flags)
fprintf(fp, "flags %02x ", ifa->ifa_flags);
if (rta_tb[IFA_LABEL])
fprintf(fp, "%s", (char*)RTA_DATA(rta_tb[IFA_LABEL]));
if (rta_tb[IFA_CACHEINFO]) {
struct ifa_cacheinfo *ci = RTA_DATA(rta_tb[IFA_CACHEINFO]);
char buf[128];
fprintf(fp, "%s", _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);
fprintf(fp, " %s", buf);
}
fprintf(fp, "\n");
fflush(fp);
return 0;
}
struct nlmsg_list
{
struct nlmsg_list *next;
struct nlmsghdr h;
};
static int print_selected_addrinfo(int ifindex, struct nlmsg_list *ainfo, FILE *fp)
{
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, fp);
}
return 0;
}
static int store_nlmsg(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) /* NOTHING */;
*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;
}
int ipaddr_list_or_flush(int argc, char **argv, int flush)
{
static const char *const option[] = { "to", "scope", "up", "label", "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 (argc <= 0) {
fprintf(stderr, "Flush requires arguments.\n");
return -1;
}
if (filter.family == AF_PACKET) {
fprintf(stderr, "Cannot flush link addresses.\n");
return -1;
}
}
while (argc > 0) {
const int option_num = compare_string_array(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("invalid \"scope\"\n", *argv);
}
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++;
argc--;
}
if (rtnl_open(&rth, 0) < 0)
exit(1);
if (rtnl_wilddump_request(&rth, preferred_family, RTM_GETLINK) < 0) {
bb_perror_msg_and_die("Cannot send dump request");
}
if (rtnl_dump_filter(&rth, store_nlmsg, &linfo, NULL, NULL) < 0) {
bb_error_msg_and_die("Dump terminated");
}
if (filter_dev) {
filter.ifindex = ll_name_to_index(filter_dev);
if (filter.ifindex <= 0) {
bb_error_msg("Device \"%s\" does not exist", filter_dev);
return -1;
}
}
if (flush) {
char flushb[4096-512];
filter.flushb = flushb;
filter.flushp = 0;
filter.flushe = sizeof(flushb);
filter.rth = &rth;
for (;;) {
if (rtnl_wilddump_request(&rth, filter.family, RTM_GETADDR) < 0) {
perror("Cannot send dump request");
exit(1);
}
filter.flushed = 0;
if (rtnl_dump_filter(&rth, print_addrinfo, stdout, NULL, NULL) < 0) {
fprintf(stderr, "Flush terminated\n");
exit(1);
}
if (filter.flushed == 0) {
fflush(stdout);
return 0;
}
if (flush_update() < 0)
exit(1);
}
}
if (filter.family != AF_PACKET) {
if (rtnl_wilddump_request(&rth, filter.family, RTM_GETADDR) < 0) {
bb_perror_msg_and_die("Cannot send dump request");
}
if (rtnl_dump_filter(&rth, store_nlmsg, &ainfo, NULL, NULL) < 0) {
bb_error_msg_and_die("Dump terminated");
}
}
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(NULL, &l->h, stdout) == 0) {
struct ifinfomsg *ifi = NLMSG_DATA(&l->h);
if (filter.family != AF_PACKET)
print_selected_addrinfo(ifi->ifi_index, ainfo, stdout);
}
fflush(stdout);
}
exit(0);
}
static int default_scope(inet_prefix *lcl)
{
if (lcl->family == AF_INET) {
if (lcl->bytelen >= 1 && *(__u8*)&lcl->data == 127)
return RT_SCOPE_HOST;
}
return 0;
}
static int ipaddr_modify(int cmd, int argc, char **argv)
{
static const char *const option[] = {
"peer", "remote", "broadcast", "brd",
"anycast", "scope", "dev", "label", "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;
int 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 (argc > 0) {
const int option_num = compare_string_array(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 (strcmp(*argv, "+") == 0) {
brd_len = -1;
}
else if (strcmp(*argv, "-") == 0) {
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, "invalid scope value");
}
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;
}
argc--;
argv++;
}
if (d == NULL) {
bb_error_msg("Not enough information: \"dev\" argument is required");
return -1;
}
if (l && matches(d, l) != 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("Broadcast can be set only for IPv4 addresses");
return -1;
}
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);
if (rtnl_open(&rth, 0) < 0)
exit(1);
ll_init_map(&rth);
if ((req.ifa.ifa_index = ll_name_to_index(d)) == 0) {
bb_error_msg("Cannot find device \"%s\"", d);
return -1;
}
if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
exit(2);
exit(0);
}
int do_ipaddr(int argc, char **argv)
{
static const char *const commands[] = {
"add", "delete", "list", "show", "lst", "flush", 0
};
int command_num = 2;
if (*argv) {
command_num = compare_string_array(commands, *argv);
}
switch (command_num) {
case 0: /* add */
return ipaddr_modify(RTM_NEWADDR, argc-1, argv+1);
case 1: /* delete */
return ipaddr_modify(RTM_DELADDR, argc-1, argv+1);
case 2: /* list */
case 3: /* show */
case 4: /* lst */
return ipaddr_list_or_flush(argc-1, argv+1, 0);
case 5: /* flush */
return ipaddr_list_or_flush(argc-1, argv+1, 1);
}
bb_error_msg_and_die("Unknown command %s", *argv);
}
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