mirror of
https://github.com/sheumann/hush.git
synced 2024-08-14 11:28:58 +00:00
function old new delta ipaddr_list_or_flush 1254 1248 -6 ipaddr_modify 1299 1279 -20 .rodata 135249 135193 -56 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-82) Total: -82 bytes Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
767 lines
19 KiB
C
767 lines
19 KiB
C
/* 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
|
|
|
|
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;
|
|
} FIX_ALIASING;
|
|
typedef struct filter_t filter_t;
|
|
|
|
#define G_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('<');
|
|
if (flags & IFF_UP && !(flags & IFF_RUNNING))
|
|
printf("NO-CARRIER,");
|
|
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_IFNAMSIZ(ifr.ifr_name, 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 NOINLINE int print_linkinfo(const struct nlmsghdr *n)
|
|
{
|
|
struct ifinfomsg *ifi = NLMSG_DATA(n);
|
|
struct rtattr *tb[IFLA_MAX+1];
|
|
int len = n->nlmsg_len;
|
|
|
|
if (n->nlmsg_type != RTM_NEWLINK && n->nlmsg_type != RTM_DELLINK)
|
|
return 0;
|
|
|
|
len -= NLMSG_LENGTH(sizeof(*ifi));
|
|
if (len < 0)
|
|
return -1;
|
|
|
|
if (G_filter.ifindex && ifi->ifi_index != G_filter.ifindex)
|
|
return 0;
|
|
if (G_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 (G_filter.label
|
|
&& (!G_filter.family || G_filter.family == AF_PACKET)
|
|
&& fnmatch(G_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>" - we checked tb[IFLA_IFNAME] above*/
|
|
(char*)RTA_DATA(tb[IFLA_IFNAME])
|
|
);
|
|
|
|
{
|
|
unsigned m_flag = 0;
|
|
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 (tb[IFLA_OPERSTATE]) {
|
|
static const char operstate_labels[] ALIGN1 =
|
|
"UNKNOWN\0""NOTPRESENT\0""DOWN\0""LOWERLAYERDOWN\0"
|
|
"TESTING\0""DORMANT\0""UP\0";
|
|
printf("state %s ", nth_string(operstate_labels,
|
|
*(__u8 *)RTA_DATA(tb[IFLA_OPERSTATE])));
|
|
}
|
|
if (G_filter.showqueue)
|
|
print_queuelen((char*)RTA_DATA(tb[IFLA_IFNAME]));
|
|
|
|
if (!G_filter.family || G_filter.family == AF_PACKET) {
|
|
SPRINT_BUF(b1);
|
|
printf("%c link/%s ", _SL_, ll_type_n2a(ifi->ifi_type, 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_all();*/
|
|
return 0;
|
|
}
|
|
|
|
static int flush_update(void)
|
|
{
|
|
if (rtnl_send(G_filter.rth, G_filter.flushb, G_filter.flushp) < 0) {
|
|
bb_perror_msg("can't send flush request");
|
|
return -1;
|
|
}
|
|
G_filter.flushp = 0;
|
|
return 0;
|
|
}
|
|
|
|
static int FAST_FUNC 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 (G_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 (G_filter.ifindex && G_filter.ifindex != ifa->ifa_index)
|
|
return 0;
|
|
if ((G_filter.scope ^ ifa->ifa_scope) & G_filter.scopemask)
|
|
return 0;
|
|
if ((G_filter.flags ^ ifa->ifa_flags) & G_filter.flagmask)
|
|
return 0;
|
|
if (G_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(G_filter.label, label, 0) != 0)
|
|
return 0;
|
|
}
|
|
if (G_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, &G_filter.pfx, G_filter.pfx.bitlen))
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (G_filter.flushb) {
|
|
struct nlmsghdr *fn;
|
|
if (NLMSG_ALIGN(G_filter.flushp) + n->nlmsg_len > G_filter.flushe) {
|
|
if (flush_update())
|
|
return -1;
|
|
}
|
|
fn = (struct nlmsghdr*)(G_filter.flushb + NLMSG_ALIGN(G_filter.flushp));
|
|
memcpy(fn, n, n->nlmsg_len);
|
|
fn->nlmsg_type = RTM_DELADDR;
|
|
fn->nlmsg_flags = NLM_F_REQUEST;
|
|
fn->nlmsg_seq = ++G_filter.rth->seq;
|
|
G_filter.flushp = (((char*)fn) + n->nlmsg_len) - G_filter.flushb;
|
|
G_filter.flushed = 1;
|
|
return 0;
|
|
}
|
|
|
|
if (n->nlmsg_type == RTM_DELADDR)
|
|
printf("Deleted ");
|
|
|
|
if (G_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_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_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_DATA(rta_tb[IFA_BROADCAST]),
|
|
abuf, sizeof(abuf)));
|
|
}
|
|
if (rta_tb[IFA_ANYCAST]) {
|
|
printf("any %s ",
|
|
rt_addr_n2a(ifa->ifa_family,
|
|
RTA_DATA(rta_tb[IFA_ANYCAST]),
|
|
abuf, sizeof(abuf)));
|
|
}
|
|
printf("scope %s ", rtnl_rtscope_n2a(ifa->ifa_scope, 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_all();*/
|
|
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
|
|
|| (G_filter.family && G_filter.family != ifa->ifa_family)
|
|
) {
|
|
continue;
|
|
}
|
|
print_addrinfo(NULL, n, NULL);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int FAST_FUNC 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 = xzalloc(n->nlmsg_len + sizeof(void*));
|
|
|
|
memcpy(&h->h, n, n->nlmsg_len);
|
|
/*h->next = NULL; - xzalloc did it */
|
|
|
|
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(&G_filter, 0, sizeof(G_filter));
|
|
G_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);
|
|
G_filter.showqueue = 1;
|
|
|
|
if (G_filter.family == AF_UNSPEC)
|
|
G_filter.family = preferred_family;
|
|
|
|
if (flush) {
|
|
if (!*argv) {
|
|
bb_error_msg_and_die(bb_msg_requires_arg, "flush");
|
|
}
|
|
if (G_filter.family == AF_PACKET) {
|
|
bb_error_msg_and_die("can't flush link addresses");
|
|
}
|
|
}
|
|
|
|
while (*argv) {
|
|
const smalluint key = index_in_strings(option, *argv);
|
|
if (key == 0) { /* to */
|
|
NEXT_ARG();
|
|
get_prefix(&G_filter.pfx, *argv, G_filter.family);
|
|
if (G_filter.family == AF_UNSPEC) {
|
|
G_filter.family = G_filter.pfx.family;
|
|
}
|
|
} else if (key == 1) { /* scope */
|
|
uint32_t scope = 0;
|
|
NEXT_ARG();
|
|
G_filter.scopemask = -1;
|
|
if (rtnl_rtscope_a2n(&scope, *argv)) {
|
|
if (strcmp(*argv, "all") != 0) {
|
|
invarg(*argv, "scope");
|
|
}
|
|
scope = RT_SCOPE_NOWHERE;
|
|
G_filter.scopemask = 0;
|
|
}
|
|
G_filter.scope = scope;
|
|
} else if (key == 2) { /* up */
|
|
G_filter.up = 1;
|
|
} else if (key == 3) { /* label */
|
|
NEXT_ARG();
|
|
G_filter.label = *argv;
|
|
} else {
|
|
if (key == 4) /* dev */
|
|
NEXT_ARG();
|
|
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) {
|
|
G_filter.ifindex = xll_name_to_index(filter_dev);
|
|
}
|
|
|
|
if (flush) {
|
|
char flushb[4096-512];
|
|
|
|
G_filter.flushb = flushb;
|
|
G_filter.flushp = 0;
|
|
G_filter.flushe = sizeof(flushb);
|
|
G_filter.rth = &rth;
|
|
|
|
for (;;) {
|
|
xrtnl_wilddump_request(&rth, G_filter.family, RTM_GETADDR);
|
|
G_filter.flushed = 0;
|
|
xrtnl_dump_filter(&rth, print_addrinfo, NULL);
|
|
if (G_filter.flushed == 0) {
|
|
return 0;
|
|
}
|
|
if (flush_update() < 0) {
|
|
return 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (G_filter.family != AF_PACKET) {
|
|
xrtnl_wilddump_request(&rth, G_filter.family, RTM_GETADDR);
|
|
xrtnl_dump_filter(&rth, store_nlmsg, &ainfo);
|
|
}
|
|
|
|
|
|
if (G_filter.family && G_filter.family != AF_PACKET) {
|
|
struct nlmsg_list **lp;
|
|
lp = &linfo;
|
|
|
|
if (G_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
|
|
|| (G_filter.family && G_filter.family != ifa->ifa_family)
|
|
) {
|
|
continue;
|
|
}
|
|
if ((G_filter.scope ^ ifa->ifa_scope) & G_filter.scopemask)
|
|
continue;
|
|
if ((G_filter.flags ^ ifa->ifa_flags) & G_filter.flagmask)
|
|
continue;
|
|
if (G_filter.pfx.family || G_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 (G_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, &G_filter.pfx, G_filter.pfx.bitlen))
|
|
continue;
|
|
}
|
|
if (G_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(G_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 (G_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 smalluint arg = index_in_strings(option, *argv);
|
|
if (arg <= 1) { /* peer, 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;
|
|
} else if (arg <= 3) { /* broadcast, 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;
|
|
}
|
|
} else if (arg == 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;
|
|
} else if (arg == 5) { /* scope */
|
|
uint32_t scope = 0;
|
|
NEXT_ARG();
|
|
if (rtnl_rtscope_a2n(&scope, *argv)) {
|
|
invarg(*argv, "scope");
|
|
}
|
|
req.ifa.ifa_scope = scope;
|
|
scoped = 1;
|
|
} else if (arg == 6) { /* dev */
|
|
NEXT_ARG();
|
|
d = *argv;
|
|
} else if (arg == 7) { /* label */
|
|
NEXT_ARG();
|
|
l = *argv;
|
|
addattr_l(&req.n, sizeof(req), IFA_LABEL, l, strlen(l)+1);
|
|
} else {
|
|
if (arg == 8) /* local */
|
|
NEXT_ARG();
|
|
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++;
|
|
}
|
|
|
|
// d cannot be null here, NEXT_ARG() of "dev" ensures that
|
|
//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";
|
|
smalluint cmd = 2;
|
|
if (*argv) {
|
|
cmd = index_in_substrings(commands, *argv);
|
|
if (cmd > 5)
|
|
bb_error_msg_and_die(bb_msg_invalid_arg, *argv, applet_name);
|
|
argv++;
|
|
if (cmd <= 1)
|
|
return ipaddr_modify((cmd == 0) ? RTM_NEWADDR : RTM_DELADDR, argv);
|
|
}
|
|
/* 2 == list, 3 == show, 4 == lst */
|
|
return ipaddr_list_or_flush(argv, cmd == 5);
|
|
}
|