[3320] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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| 4 | *
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| 5 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
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| 6 | *
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| 7 | * Changes:
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| 8 | * Laszlo Valko <valko@linux.karinthy.hu> 990223: address label must be zero terminated
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| 9 | */
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| 10 |
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| 11 | #include <fnmatch.h>
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| 12 | #include <net/if.h>
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| 13 | #include <net/if_arp.h>
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| 14 |
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| 15 | #include "ip_common.h" /* #include "libbb.h" is inside */
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| 16 | #include "rt_names.h"
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| 17 | #include "utils.h"
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| 18 |
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| 19 | #ifndef IFF_LOWER_UP
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| 20 | /* from linux/if.h */
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| 21 | #define IFF_LOWER_UP 0x10000 /* driver signals L1 up */
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| 22 | #endif
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| 23 |
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| 24 | struct filter_t {
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| 25 | char *label;
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| 26 | char *flushb;
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| 27 | struct rtnl_handle *rth;
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| 28 | int scope, scopemask;
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| 29 | int flags, flagmask;
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| 30 | int flushp;
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| 31 | int flushe;
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| 32 | int ifindex;
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| 33 | family_t family;
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| 34 | smallint showqueue;
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| 35 | smallint oneline;
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| 36 | smallint up;
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| 37 | smallint flushed;
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| 38 | inet_prefix pfx;
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| 39 | } FIX_ALIASING;
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| 40 | typedef struct filter_t filter_t;
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| 41 |
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| 42 | #define G_filter (*(filter_t*)&bb_common_bufsiz1)
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| 43 |
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| 44 |
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| 45 | static void print_link_flags(unsigned flags, unsigned mdown)
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| 46 | {
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| 47 | static const int flag_masks[] = {
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| 48 | IFF_LOOPBACK, IFF_BROADCAST, IFF_POINTOPOINT,
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| 49 | IFF_MULTICAST, IFF_NOARP, IFF_UP, IFF_LOWER_UP };
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| 50 | static const char flag_labels[] ALIGN1 =
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| 51 | "LOOPBACK\0""BROADCAST\0""POINTOPOINT\0"
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| 52 | "MULTICAST\0""NOARP\0""UP\0""LOWER_UP\0";
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| 53 |
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| 54 | bb_putchar('<');
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| 55 | if (flags & IFF_UP && !(flags & IFF_RUNNING))
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| 56 | printf("NO-CARRIER,");
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| 57 | flags &= ~IFF_RUNNING;
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| 58 | #if 0
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| 59 | _PF(ALLMULTI);
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| 60 | _PF(PROMISC);
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| 61 | _PF(MASTER);
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| 62 | _PF(SLAVE);
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| 63 | _PF(DEBUG);
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| 64 | _PF(DYNAMIC);
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| 65 | _PF(AUTOMEDIA);
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| 66 | _PF(PORTSEL);
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| 67 | _PF(NOTRAILERS);
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| 68 | #endif
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| 69 | flags = print_flags_separated(flag_masks, flag_labels, flags, ",");
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| 70 | if (flags)
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| 71 | printf("%x", flags);
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| 72 | if (mdown)
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| 73 | printf(",M-DOWN");
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| 74 | printf("> ");
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| 75 | }
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| 76 |
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| 77 | static void print_queuelen(char *name)
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| 78 | {
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| 79 | struct ifreq ifr;
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| 80 | int s;
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| 81 |
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| 82 | s = socket(AF_INET, SOCK_STREAM, 0);
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| 83 | if (s < 0)
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| 84 | return;
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| 85 |
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| 86 | memset(&ifr, 0, sizeof(ifr));
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| 87 | strncpy_IFNAMSIZ(ifr.ifr_name, name);
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| 88 | if (ioctl_or_warn(s, SIOCGIFTXQLEN, &ifr) < 0) {
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| 89 | close(s);
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| 90 | return;
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| 91 | }
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| 92 | close(s);
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| 93 |
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| 94 | if (ifr.ifr_qlen)
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| 95 | printf("qlen %d", ifr.ifr_qlen);
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| 96 | }
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| 97 |
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| 98 | static NOINLINE int print_linkinfo(const struct nlmsghdr *n)
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| 99 | {
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| 100 | struct ifinfomsg *ifi = NLMSG_DATA(n);
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| 101 | struct rtattr *tb[IFLA_MAX+1];
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| 102 | int len = n->nlmsg_len;
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| 103 |
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| 104 | if (n->nlmsg_type != RTM_NEWLINK && n->nlmsg_type != RTM_DELLINK)
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| 105 | return 0;
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| 106 |
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| 107 | len -= NLMSG_LENGTH(sizeof(*ifi));
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| 108 | if (len < 0)
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| 109 | return -1;
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| 110 |
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| 111 | if (G_filter.ifindex && ifi->ifi_index != G_filter.ifindex)
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| 112 | return 0;
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| 113 | if (G_filter.up && !(ifi->ifi_flags & IFF_UP))
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| 114 | return 0;
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| 115 |
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| 116 | memset(tb, 0, sizeof(tb));
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| 117 | parse_rtattr(tb, IFLA_MAX, IFLA_RTA(ifi), len);
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| 118 | if (tb[IFLA_IFNAME] == NULL) {
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| 119 | bb_error_msg("nil ifname");
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| 120 | return -1;
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| 121 | }
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| 122 | if (G_filter.label
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| 123 | && (!G_filter.family || G_filter.family == AF_PACKET)
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| 124 | && fnmatch(G_filter.label, RTA_DATA(tb[IFLA_IFNAME]), 0)
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| 125 | ) {
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| 126 | return 0;
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| 127 | }
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| 128 |
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| 129 | if (n->nlmsg_type == RTM_DELLINK)
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| 130 | printf("Deleted ");
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| 131 |
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| 132 | printf("%d: %s", ifi->ifi_index,
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| 133 | /*tb[IFLA_IFNAME] ? (char*)RTA_DATA(tb[IFLA_IFNAME]) : "<nil>" - we checked tb[IFLA_IFNAME] above*/
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| 134 | (char*)RTA_DATA(tb[IFLA_IFNAME])
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| 135 | );
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| 136 |
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| 137 | {
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| 138 | unsigned m_flag = 0;
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| 139 | if (tb[IFLA_LINK]) {
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| 140 | SPRINT_BUF(b1);
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| 141 | int iflink = *(int*)RTA_DATA(tb[IFLA_LINK]);
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| 142 | if (iflink == 0)
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| 143 | printf("@NONE: ");
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| 144 | else {
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| 145 | printf("@%s: ", ll_idx_n2a(iflink, b1));
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| 146 | m_flag = ll_index_to_flags(iflink);
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| 147 | m_flag = !(m_flag & IFF_UP);
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| 148 | }
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| 149 | } else {
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| 150 | printf(": ");
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| 151 | }
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| 152 | print_link_flags(ifi->ifi_flags, m_flag);
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| 153 | }
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| 154 |
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| 155 | if (tb[IFLA_MTU])
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| 156 | printf("mtu %u ", *(int*)RTA_DATA(tb[IFLA_MTU]));
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| 157 | if (tb[IFLA_QDISC])
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| 158 | printf("qdisc %s ", (char*)RTA_DATA(tb[IFLA_QDISC]));
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| 159 | #ifdef IFLA_MASTER
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| 160 | if (tb[IFLA_MASTER]) {
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| 161 | SPRINT_BUF(b1);
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| 162 | printf("master %s ", ll_idx_n2a(*(int*)RTA_DATA(tb[IFLA_MASTER]), b1));
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| 163 | }
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| 164 | #endif
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| 165 | if (tb[IFLA_OPERSTATE]) {
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| 166 | static const char operstate_labels[] ALIGN1 =
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| 167 | "UNKNOWN\0""NOTPRESENT\0""DOWN\0""LOWERLAYERDOWN\0"
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| 168 | "TESTING\0""DORMANT\0""UP\0";
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| 169 | printf("state %s ", nth_string(operstate_labels,
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| 170 | *(uint8_t *)RTA_DATA(tb[IFLA_OPERSTATE])));
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| 171 | }
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| 172 | if (G_filter.showqueue)
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| 173 | print_queuelen((char*)RTA_DATA(tb[IFLA_IFNAME]));
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| 174 |
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| 175 | if (!G_filter.family || G_filter.family == AF_PACKET) {
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| 176 | SPRINT_BUF(b1);
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| 177 | printf("%c link/%s ", _SL_, ll_type_n2a(ifi->ifi_type, b1));
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| 178 |
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| 179 | if (tb[IFLA_ADDRESS]) {
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| 180 | fputs(ll_addr_n2a(RTA_DATA(tb[IFLA_ADDRESS]),
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| 181 | RTA_PAYLOAD(tb[IFLA_ADDRESS]),
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| 182 | ifi->ifi_type,
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| 183 | b1, sizeof(b1)), stdout);
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| 184 | }
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| 185 | if (tb[IFLA_BROADCAST]) {
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| 186 | if (ifi->ifi_flags & IFF_POINTOPOINT)
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| 187 | printf(" peer ");
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| 188 | else
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| 189 | printf(" brd ");
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| 190 | fputs(ll_addr_n2a(RTA_DATA(tb[IFLA_BROADCAST]),
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| 191 | RTA_PAYLOAD(tb[IFLA_BROADCAST]),
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| 192 | ifi->ifi_type,
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| 193 | b1, sizeof(b1)), stdout);
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| 194 | }
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| 195 | }
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| 196 | bb_putchar('\n');
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| 197 | /*fflush_all();*/
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| 198 | return 0;
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| 199 | }
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| 200 |
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| 201 | static int flush_update(void)
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| 202 | {
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| 203 | if (rtnl_send(G_filter.rth, G_filter.flushb, G_filter.flushp) < 0) {
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| 204 | bb_perror_msg("can't send flush request");
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| 205 | return -1;
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| 206 | }
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| 207 | G_filter.flushp = 0;
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| 208 | return 0;
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| 209 | }
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| 210 |
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| 211 | static int FAST_FUNC print_addrinfo(const struct sockaddr_nl *who UNUSED_PARAM,
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| 212 | struct nlmsghdr *n, void *arg UNUSED_PARAM)
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| 213 | {
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| 214 | struct ifaddrmsg *ifa = NLMSG_DATA(n);
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| 215 | int len = n->nlmsg_len;
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| 216 | struct rtattr * rta_tb[IFA_MAX+1];
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| 217 | char abuf[256];
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| 218 | SPRINT_BUF(b1);
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| 219 |
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| 220 | if (n->nlmsg_type != RTM_NEWADDR && n->nlmsg_type != RTM_DELADDR)
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| 221 | return 0;
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| 222 | len -= NLMSG_LENGTH(sizeof(*ifa));
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| 223 | if (len < 0) {
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| 224 | bb_error_msg("wrong nlmsg len %d", len);
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| 225 | return -1;
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| 226 | }
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| 227 |
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| 228 | if (G_filter.flushb && n->nlmsg_type != RTM_NEWADDR)
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| 229 | return 0;
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| 230 |
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| 231 | memset(rta_tb, 0, sizeof(rta_tb));
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| 232 | parse_rtattr(rta_tb, IFA_MAX, IFA_RTA(ifa), n->nlmsg_len - NLMSG_LENGTH(sizeof(*ifa)));
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| 233 |
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| 234 | if (!rta_tb[IFA_LOCAL])
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| 235 | rta_tb[IFA_LOCAL] = rta_tb[IFA_ADDRESS];
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| 236 | if (!rta_tb[IFA_ADDRESS])
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| 237 | rta_tb[IFA_ADDRESS] = rta_tb[IFA_LOCAL];
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| 238 |
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| 239 | if (G_filter.ifindex && G_filter.ifindex != ifa->ifa_index)
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| 240 | return 0;
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| 241 | if ((G_filter.scope ^ ifa->ifa_scope) & G_filter.scopemask)
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| 242 | return 0;
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| 243 | if ((G_filter.flags ^ ifa->ifa_flags) & G_filter.flagmask)
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| 244 | return 0;
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| 245 | if (G_filter.label) {
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| 246 | const char *label;
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| 247 | if (rta_tb[IFA_LABEL])
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| 248 | label = RTA_DATA(rta_tb[IFA_LABEL]);
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| 249 | else
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| 250 | label = ll_idx_n2a(ifa->ifa_index, b1);
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| 251 | if (fnmatch(G_filter.label, label, 0) != 0)
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| 252 | return 0;
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| 253 | }
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| 254 | if (G_filter.pfx.family) {
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| 255 | if (rta_tb[IFA_LOCAL]) {
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| 256 | inet_prefix dst;
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| 257 | memset(&dst, 0, sizeof(dst));
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| 258 | dst.family = ifa->ifa_family;
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| 259 | memcpy(&dst.data, RTA_DATA(rta_tb[IFA_LOCAL]), RTA_PAYLOAD(rta_tb[IFA_LOCAL]));
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| 260 | if (inet_addr_match(&dst, &G_filter.pfx, G_filter.pfx.bitlen))
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| 261 | return 0;
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| 262 | }
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| 263 | }
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| 264 |
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| 265 | if (G_filter.flushb) {
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| 266 | struct nlmsghdr *fn;
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| 267 | if (NLMSG_ALIGN(G_filter.flushp) + n->nlmsg_len > G_filter.flushe) {
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| 268 | if (flush_update())
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| 269 | return -1;
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| 270 | }
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| 271 | fn = (struct nlmsghdr*)(G_filter.flushb + NLMSG_ALIGN(G_filter.flushp));
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| 272 | memcpy(fn, n, n->nlmsg_len);
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| 273 | fn->nlmsg_type = RTM_DELADDR;
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| 274 | fn->nlmsg_flags = NLM_F_REQUEST;
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| 275 | fn->nlmsg_seq = ++G_filter.rth->seq;
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| 276 | G_filter.flushp = (((char*)fn) + n->nlmsg_len) - G_filter.flushb;
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| 277 | G_filter.flushed = 1;
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| 278 | return 0;
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| 279 | }
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| 280 |
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| 281 | if (n->nlmsg_type == RTM_DELADDR)
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| 282 | printf("Deleted ");
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| 283 |
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| 284 | if (G_filter.oneline)
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| 285 | printf("%u: %s", ifa->ifa_index, ll_index_to_name(ifa->ifa_index));
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| 286 | if (ifa->ifa_family == AF_INET)
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| 287 | printf(" inet ");
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| 288 | else if (ifa->ifa_family == AF_INET6)
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| 289 | printf(" inet6 ");
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| 290 | else
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| 291 | printf(" family %d ", ifa->ifa_family);
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| 292 |
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| 293 | if (rta_tb[IFA_LOCAL]) {
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| 294 | fputs(rt_addr_n2a(ifa->ifa_family,
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| 295 | RTA_DATA(rta_tb[IFA_LOCAL]),
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| 296 | abuf, sizeof(abuf)), stdout);
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| 297 |
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| 298 | if (rta_tb[IFA_ADDRESS] == NULL
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| 299 | || memcmp(RTA_DATA(rta_tb[IFA_ADDRESS]), RTA_DATA(rta_tb[IFA_LOCAL]), 4) == 0
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| 300 | ) {
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| 301 | printf("/%d ", ifa->ifa_prefixlen);
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| 302 | } else {
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| 303 | printf(" peer %s/%d ",
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| 304 | rt_addr_n2a(ifa->ifa_family,
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| 305 | RTA_DATA(rta_tb[IFA_ADDRESS]),
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| 306 | abuf, sizeof(abuf)),
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| 307 | ifa->ifa_prefixlen);
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| 308 | }
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| 309 | }
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| 310 |
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| 311 | if (rta_tb[IFA_BROADCAST]) {
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| 312 | printf("brd %s ",
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| 313 | rt_addr_n2a(ifa->ifa_family,
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| 314 | RTA_DATA(rta_tb[IFA_BROADCAST]),
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| 315 | abuf, sizeof(abuf)));
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| 316 | }
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| 317 | if (rta_tb[IFA_ANYCAST]) {
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| 318 | printf("any %s ",
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| 319 | rt_addr_n2a(ifa->ifa_family,
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| 320 | RTA_DATA(rta_tb[IFA_ANYCAST]),
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| 321 | abuf, sizeof(abuf)));
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| 322 | }
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| 323 | printf("scope %s ", rtnl_rtscope_n2a(ifa->ifa_scope, b1));
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| 324 | if (ifa->ifa_flags & IFA_F_SECONDARY) {
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| 325 | ifa->ifa_flags &= ~IFA_F_SECONDARY;
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| 326 | printf("secondary ");
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| 327 | }
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| 328 | if (ifa->ifa_flags & IFA_F_TENTATIVE) {
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| 329 | ifa->ifa_flags &= ~IFA_F_TENTATIVE;
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| 330 | printf("tentative ");
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| 331 | }
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| 332 | if (ifa->ifa_flags & IFA_F_DEPRECATED) {
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| 333 | ifa->ifa_flags &= ~IFA_F_DEPRECATED;
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| 334 | printf("deprecated ");
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| 335 | }
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| 336 | if (!(ifa->ifa_flags & IFA_F_PERMANENT)) {
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| 337 | printf("dynamic ");
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| 338 | } else
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| 339 | ifa->ifa_flags &= ~IFA_F_PERMANENT;
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| 340 | if (ifa->ifa_flags)
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| 341 | printf("flags %02x ", ifa->ifa_flags);
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| 342 | if (rta_tb[IFA_LABEL])
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| 343 | fputs((char*)RTA_DATA(rta_tb[IFA_LABEL]), stdout);
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| 344 | if (rta_tb[IFA_CACHEINFO]) {
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| 345 | struct ifa_cacheinfo *ci = RTA_DATA(rta_tb[IFA_CACHEINFO]);
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| 346 | char buf[128];
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| 347 | bb_putchar(_SL_);
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| 348 | if (ci->ifa_valid == 0xFFFFFFFFU)
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| 349 | sprintf(buf, "valid_lft forever");
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| 350 | else
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| 351 | sprintf(buf, "valid_lft %dsec", ci->ifa_valid);
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| 352 | if (ci->ifa_prefered == 0xFFFFFFFFU)
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| 353 | sprintf(buf+strlen(buf), " preferred_lft forever");
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| 354 | else
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| 355 | sprintf(buf+strlen(buf), " preferred_lft %dsec", ci->ifa_prefered);
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| 356 | printf(" %s", buf);
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| 357 | }
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| 358 | bb_putchar('\n');
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| 359 | /*fflush_all();*/
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| 360 | return 0;
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| 361 | }
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| 362 |
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| 363 |
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| 364 | struct nlmsg_list {
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| 365 | struct nlmsg_list *next;
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| 366 | struct nlmsghdr h;
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| 367 | };
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| 368 |
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| 369 | static int print_selected_addrinfo(int ifindex, struct nlmsg_list *ainfo)
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| 370 | {
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| 371 | for (; ainfo; ainfo = ainfo->next) {
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| 372 | struct nlmsghdr *n = &ainfo->h;
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| 373 | struct ifaddrmsg *ifa = NLMSG_DATA(n);
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| 374 |
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| 375 | if (n->nlmsg_type != RTM_NEWADDR)
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| 376 | continue;
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| 377 | if (n->nlmsg_len < NLMSG_LENGTH(sizeof(ifa)))
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| 378 | return -1;
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| 379 | if (ifa->ifa_index != ifindex
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| 380 | || (G_filter.family && G_filter.family != ifa->ifa_family)
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| 381 | ) {
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| 382 | continue;
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| 383 | }
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| 384 | print_addrinfo(NULL, n, NULL);
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| 385 | }
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| 386 | return 0;
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| 387 | }
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| 388 |
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| 389 |
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| 390 | static int FAST_FUNC store_nlmsg(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
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| 391 | {
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| 392 | struct nlmsg_list **linfo = (struct nlmsg_list**)arg;
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| 393 | struct nlmsg_list *h;
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| 394 | struct nlmsg_list **lp;
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| 395 |
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| 396 | h = xzalloc(n->nlmsg_len + sizeof(void*));
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| 397 |
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| 398 | memcpy(&h->h, n, n->nlmsg_len);
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| 399 | /*h->next = NULL; - xzalloc did it */
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| 400 |
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| 401 | for (lp = linfo; *lp; lp = &(*lp)->next)
|
---|
| 402 | continue;
|
---|
| 403 | *lp = h;
|
---|
| 404 |
|
---|
| 405 | ll_remember_index(who, n, NULL);
|
---|
| 406 | return 0;
|
---|
| 407 | }
|
---|
| 408 |
|
---|
| 409 | static void ipaddr_reset_filter(int _oneline)
|
---|
| 410 | {
|
---|
| 411 | memset(&G_filter, 0, sizeof(G_filter));
|
---|
| 412 | G_filter.oneline = _oneline;
|
---|
| 413 | }
|
---|
| 414 |
|
---|
| 415 | /* Return value becomes exitcode. It's okay to not return at all */
|
---|
| 416 | int FAST_FUNC ipaddr_list_or_flush(char **argv, int flush)
|
---|
| 417 | {
|
---|
| 418 | static const char option[] ALIGN1 = "to\0""scope\0""up\0""label\0""dev\0";
|
---|
| 419 |
|
---|
| 420 | struct nlmsg_list *linfo = NULL;
|
---|
| 421 | struct nlmsg_list *ainfo = NULL;
|
---|
| 422 | struct nlmsg_list *l;
|
---|
| 423 | struct rtnl_handle rth;
|
---|
| 424 | char *filter_dev = NULL;
|
---|
| 425 | int no_link = 0;
|
---|
| 426 |
|
---|
| 427 | ipaddr_reset_filter(oneline);
|
---|
| 428 | G_filter.showqueue = 1;
|
---|
| 429 |
|
---|
| 430 | if (G_filter.family == AF_UNSPEC)
|
---|
| 431 | G_filter.family = preferred_family;
|
---|
| 432 |
|
---|
| 433 | if (flush) {
|
---|
| 434 | if (!*argv) {
|
---|
| 435 | bb_error_msg_and_die(bb_msg_requires_arg, "flush");
|
---|
| 436 | }
|
---|
| 437 | if (G_filter.family == AF_PACKET) {
|
---|
| 438 | bb_error_msg_and_die("can't flush link addresses");
|
---|
| 439 | }
|
---|
| 440 | }
|
---|
| 441 |
|
---|
| 442 | while (*argv) {
|
---|
| 443 | const smalluint key = index_in_strings(option, *argv);
|
---|
| 444 | if (key == 0) { /* to */
|
---|
| 445 | NEXT_ARG();
|
---|
| 446 | get_prefix(&G_filter.pfx, *argv, G_filter.family);
|
---|
| 447 | if (G_filter.family == AF_UNSPEC) {
|
---|
| 448 | G_filter.family = G_filter.pfx.family;
|
---|
| 449 | }
|
---|
| 450 | } else if (key == 1) { /* scope */
|
---|
| 451 | uint32_t scope = 0;
|
---|
| 452 | NEXT_ARG();
|
---|
| 453 | G_filter.scopemask = -1;
|
---|
| 454 | if (rtnl_rtscope_a2n(&scope, *argv)) {
|
---|
| 455 | if (strcmp(*argv, "all") != 0) {
|
---|
| 456 | invarg(*argv, "scope");
|
---|
| 457 | }
|
---|
| 458 | scope = RT_SCOPE_NOWHERE;
|
---|
| 459 | G_filter.scopemask = 0;
|
---|
| 460 | }
|
---|
| 461 | G_filter.scope = scope;
|
---|
| 462 | } else if (key == 2) { /* up */
|
---|
| 463 | G_filter.up = 1;
|
---|
| 464 | } else if (key == 3) { /* label */
|
---|
| 465 | NEXT_ARG();
|
---|
| 466 | G_filter.label = *argv;
|
---|
| 467 | } else {
|
---|
| 468 | if (key == 4) /* dev */
|
---|
| 469 | NEXT_ARG();
|
---|
| 470 | if (filter_dev)
|
---|
| 471 | duparg2("dev", *argv);
|
---|
| 472 | filter_dev = *argv;
|
---|
| 473 | }
|
---|
| 474 | argv++;
|
---|
| 475 | }
|
---|
| 476 |
|
---|
| 477 | xrtnl_open(&rth);
|
---|
| 478 |
|
---|
| 479 | xrtnl_wilddump_request(&rth, preferred_family, RTM_GETLINK);
|
---|
| 480 | xrtnl_dump_filter(&rth, store_nlmsg, &linfo);
|
---|
| 481 |
|
---|
| 482 | if (filter_dev) {
|
---|
| 483 | G_filter.ifindex = xll_name_to_index(filter_dev);
|
---|
| 484 | }
|
---|
| 485 |
|
---|
| 486 | if (flush) {
|
---|
| 487 | char flushb[4096-512];
|
---|
| 488 |
|
---|
| 489 | G_filter.flushb = flushb;
|
---|
| 490 | G_filter.flushp = 0;
|
---|
| 491 | G_filter.flushe = sizeof(flushb);
|
---|
| 492 | G_filter.rth = &rth;
|
---|
| 493 |
|
---|
| 494 | for (;;) {
|
---|
| 495 | xrtnl_wilddump_request(&rth, G_filter.family, RTM_GETADDR);
|
---|
| 496 | G_filter.flushed = 0;
|
---|
| 497 | xrtnl_dump_filter(&rth, print_addrinfo, NULL);
|
---|
| 498 | if (G_filter.flushed == 0) {
|
---|
| 499 | return 0;
|
---|
| 500 | }
|
---|
| 501 | if (flush_update() < 0) {
|
---|
| 502 | return 1;
|
---|
| 503 | }
|
---|
| 504 | }
|
---|
| 505 | }
|
---|
| 506 |
|
---|
| 507 | if (G_filter.family != AF_PACKET) {
|
---|
| 508 | xrtnl_wilddump_request(&rth, G_filter.family, RTM_GETADDR);
|
---|
| 509 | xrtnl_dump_filter(&rth, store_nlmsg, &ainfo);
|
---|
| 510 | }
|
---|
| 511 |
|
---|
| 512 |
|
---|
| 513 | if (G_filter.family && G_filter.family != AF_PACKET) {
|
---|
| 514 | struct nlmsg_list **lp;
|
---|
| 515 | lp = &linfo;
|
---|
| 516 |
|
---|
| 517 | if (G_filter.oneline)
|
---|
| 518 | no_link = 1;
|
---|
| 519 |
|
---|
| 520 | while ((l = *lp) != NULL) {
|
---|
| 521 | int ok = 0;
|
---|
| 522 | struct ifinfomsg *ifi = NLMSG_DATA(&l->h);
|
---|
| 523 | struct nlmsg_list *a;
|
---|
| 524 |
|
---|
| 525 | for (a = ainfo; a; a = a->next) {
|
---|
| 526 | struct nlmsghdr *n = &a->h;
|
---|
| 527 | struct ifaddrmsg *ifa = NLMSG_DATA(n);
|
---|
| 528 |
|
---|
| 529 | if (ifa->ifa_index != ifi->ifi_index
|
---|
| 530 | || (G_filter.family && G_filter.family != ifa->ifa_family)
|
---|
| 531 | ) {
|
---|
| 532 | continue;
|
---|
| 533 | }
|
---|
| 534 | if ((G_filter.scope ^ ifa->ifa_scope) & G_filter.scopemask)
|
---|
| 535 | continue;
|
---|
| 536 | if ((G_filter.flags ^ ifa->ifa_flags) & G_filter.flagmask)
|
---|
| 537 | continue;
|
---|
| 538 | if (G_filter.pfx.family || G_filter.label) {
|
---|
| 539 | struct rtattr *tb[IFA_MAX+1];
|
---|
| 540 | memset(tb, 0, sizeof(tb));
|
---|
| 541 | parse_rtattr(tb, IFA_MAX, IFA_RTA(ifa), IFA_PAYLOAD(n));
|
---|
| 542 | if (!tb[IFA_LOCAL])
|
---|
| 543 | tb[IFA_LOCAL] = tb[IFA_ADDRESS];
|
---|
| 544 |
|
---|
| 545 | if (G_filter.pfx.family && tb[IFA_LOCAL]) {
|
---|
| 546 | inet_prefix dst;
|
---|
| 547 | memset(&dst, 0, sizeof(dst));
|
---|
| 548 | dst.family = ifa->ifa_family;
|
---|
| 549 | memcpy(&dst.data, RTA_DATA(tb[IFA_LOCAL]), RTA_PAYLOAD(tb[IFA_LOCAL]));
|
---|
| 550 | if (inet_addr_match(&dst, &G_filter.pfx, G_filter.pfx.bitlen))
|
---|
| 551 | continue;
|
---|
| 552 | }
|
---|
| 553 | if (G_filter.label) {
|
---|
| 554 | SPRINT_BUF(b1);
|
---|
| 555 | const char *label;
|
---|
| 556 | if (tb[IFA_LABEL])
|
---|
| 557 | label = RTA_DATA(tb[IFA_LABEL]);
|
---|
| 558 | else
|
---|
| 559 | label = ll_idx_n2a(ifa->ifa_index, b1);
|
---|
| 560 | if (fnmatch(G_filter.label, label, 0) != 0)
|
---|
| 561 | continue;
|
---|
| 562 | }
|
---|
| 563 | }
|
---|
| 564 |
|
---|
| 565 | ok = 1;
|
---|
| 566 | break;
|
---|
| 567 | }
|
---|
| 568 | if (!ok)
|
---|
| 569 | *lp = l->next;
|
---|
| 570 | else
|
---|
| 571 | lp = &l->next;
|
---|
| 572 | }
|
---|
| 573 | }
|
---|
| 574 |
|
---|
| 575 | for (l = linfo; l; l = l->next) {
|
---|
| 576 | if (no_link || print_linkinfo(&l->h) == 0) {
|
---|
| 577 | struct ifinfomsg *ifi = NLMSG_DATA(&l->h);
|
---|
| 578 | if (G_filter.family != AF_PACKET)
|
---|
| 579 | print_selected_addrinfo(ifi->ifi_index, ainfo);
|
---|
| 580 | }
|
---|
| 581 | }
|
---|
| 582 |
|
---|
| 583 | return 0;
|
---|
| 584 | }
|
---|
| 585 |
|
---|
| 586 | static int default_scope(inet_prefix *lcl)
|
---|
| 587 | {
|
---|
| 588 | if (lcl->family == AF_INET) {
|
---|
| 589 | if (lcl->bytelen >= 1 && *(uint8_t*)&lcl->data == 127)
|
---|
| 590 | return RT_SCOPE_HOST;
|
---|
| 591 | }
|
---|
| 592 | return 0;
|
---|
| 593 | }
|
---|
| 594 |
|
---|
| 595 | /* Return value becomes exitcode. It's okay to not return at all */
|
---|
| 596 | static int ipaddr_modify(int cmd, char **argv)
|
---|
| 597 | {
|
---|
| 598 | static const char option[] ALIGN1 =
|
---|
| 599 | "peer\0""remote\0""broadcast\0""brd\0"
|
---|
| 600 | "anycast\0""scope\0""dev\0""label\0""local\0";
|
---|
| 601 | struct rtnl_handle rth;
|
---|
| 602 | struct {
|
---|
| 603 | struct nlmsghdr n;
|
---|
| 604 | struct ifaddrmsg ifa;
|
---|
| 605 | char buf[256];
|
---|
| 606 | } req;
|
---|
| 607 | char *d = NULL;
|
---|
| 608 | char *l = NULL;
|
---|
| 609 | inet_prefix lcl;
|
---|
| 610 | inet_prefix peer;
|
---|
| 611 | int local_len = 0;
|
---|
| 612 | int peer_len = 0;
|
---|
| 613 | int brd_len = 0;
|
---|
| 614 | int any_len = 0;
|
---|
| 615 | bool scoped = 0;
|
---|
| 616 |
|
---|
| 617 | memset(&req, 0, sizeof(req));
|
---|
| 618 |
|
---|
| 619 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg));
|
---|
| 620 | req.n.nlmsg_flags = NLM_F_REQUEST;
|
---|
| 621 | req.n.nlmsg_type = cmd;
|
---|
| 622 | req.ifa.ifa_family = preferred_family;
|
---|
| 623 |
|
---|
| 624 | while (*argv) {
|
---|
| 625 | const smalluint arg = index_in_strings(option, *argv);
|
---|
| 626 | if (arg <= 1) { /* peer, remote */
|
---|
| 627 | NEXT_ARG();
|
---|
| 628 |
|
---|
| 629 | if (peer_len) {
|
---|
| 630 | duparg("peer", *argv);
|
---|
| 631 | }
|
---|
| 632 | get_prefix(&peer, *argv, req.ifa.ifa_family);
|
---|
| 633 | peer_len = peer.bytelen;
|
---|
| 634 | if (req.ifa.ifa_family == AF_UNSPEC) {
|
---|
| 635 | req.ifa.ifa_family = peer.family;
|
---|
| 636 | }
|
---|
| 637 | addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &peer.data, peer.bytelen);
|
---|
| 638 | req.ifa.ifa_prefixlen = peer.bitlen;
|
---|
| 639 | } else if (arg <= 3) { /* broadcast, brd */
|
---|
| 640 | inet_prefix addr;
|
---|
| 641 | NEXT_ARG();
|
---|
| 642 | if (brd_len) {
|
---|
| 643 | duparg("broadcast", *argv);
|
---|
| 644 | }
|
---|
| 645 | if (LONE_CHAR(*argv, '+')) {
|
---|
| 646 | brd_len = -1;
|
---|
| 647 | } else if (LONE_DASH(*argv)) {
|
---|
| 648 | brd_len = -2;
|
---|
| 649 | } else {
|
---|
| 650 | get_addr(&addr, *argv, req.ifa.ifa_family);
|
---|
| 651 | if (req.ifa.ifa_family == AF_UNSPEC)
|
---|
| 652 | req.ifa.ifa_family = addr.family;
|
---|
| 653 | addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &addr.data, addr.bytelen);
|
---|
| 654 | brd_len = addr.bytelen;
|
---|
| 655 | }
|
---|
| 656 | } else if (arg == 4) { /* anycast */
|
---|
| 657 | inet_prefix addr;
|
---|
| 658 | NEXT_ARG();
|
---|
| 659 | if (any_len) {
|
---|
| 660 | duparg("anycast", *argv);
|
---|
| 661 | }
|
---|
| 662 | get_addr(&addr, *argv, req.ifa.ifa_family);
|
---|
| 663 | if (req.ifa.ifa_family == AF_UNSPEC) {
|
---|
| 664 | req.ifa.ifa_family = addr.family;
|
---|
| 665 | }
|
---|
| 666 | addattr_l(&req.n, sizeof(req), IFA_ANYCAST, &addr.data, addr.bytelen);
|
---|
| 667 | any_len = addr.bytelen;
|
---|
| 668 | } else if (arg == 5) { /* scope */
|
---|
| 669 | uint32_t scope = 0;
|
---|
| 670 | NEXT_ARG();
|
---|
| 671 | if (rtnl_rtscope_a2n(&scope, *argv)) {
|
---|
| 672 | invarg(*argv, "scope");
|
---|
| 673 | }
|
---|
| 674 | req.ifa.ifa_scope = scope;
|
---|
| 675 | scoped = 1;
|
---|
| 676 | } else if (arg == 6) { /* dev */
|
---|
| 677 | NEXT_ARG();
|
---|
| 678 | d = *argv;
|
---|
| 679 | } else if (arg == 7) { /* label */
|
---|
| 680 | NEXT_ARG();
|
---|
| 681 | l = *argv;
|
---|
| 682 | addattr_l(&req.n, sizeof(req), IFA_LABEL, l, strlen(l) + 1);
|
---|
| 683 | } else {
|
---|
| 684 | if (arg == 8) /* local */
|
---|
| 685 | NEXT_ARG();
|
---|
| 686 | if (local_len) {
|
---|
| 687 | duparg2("local", *argv);
|
---|
| 688 | }
|
---|
| 689 | get_prefix(&lcl, *argv, req.ifa.ifa_family);
|
---|
| 690 | if (req.ifa.ifa_family == AF_UNSPEC) {
|
---|
| 691 | req.ifa.ifa_family = lcl.family;
|
---|
| 692 | }
|
---|
| 693 | addattr_l(&req.n, sizeof(req), IFA_LOCAL, &lcl.data, lcl.bytelen);
|
---|
| 694 | local_len = lcl.bytelen;
|
---|
| 695 | }
|
---|
| 696 | argv++;
|
---|
| 697 | }
|
---|
| 698 |
|
---|
| 699 | if (!d) {
|
---|
| 700 | /* There was no "dev IFACE", but we need that */
|
---|
| 701 | bb_error_msg_and_die("need \"dev IFACE\"");
|
---|
| 702 | }
|
---|
| 703 | if (l && strncmp(d, l, strlen(d)) != 0) {
|
---|
| 704 | bb_error_msg_and_die("\"dev\" (%s) must match \"label\" (%s)", d, l);
|
---|
| 705 | }
|
---|
| 706 |
|
---|
| 707 | if (peer_len == 0 && local_len && cmd != RTM_DELADDR) {
|
---|
| 708 | peer = lcl;
|
---|
| 709 | addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &lcl.data, lcl.bytelen);
|
---|
| 710 | }
|
---|
| 711 | if (req.ifa.ifa_prefixlen == 0)
|
---|
| 712 | req.ifa.ifa_prefixlen = lcl.bitlen;
|
---|
| 713 |
|
---|
| 714 | if (brd_len < 0 && cmd != RTM_DELADDR) {
|
---|
| 715 | inet_prefix brd;
|
---|
| 716 | int i;
|
---|
| 717 | if (req.ifa.ifa_family != AF_INET) {
|
---|
| 718 | bb_error_msg_and_die("broadcast can be set only for IPv4 addresses");
|
---|
| 719 | }
|
---|
| 720 | brd = peer;
|
---|
| 721 | if (brd.bitlen <= 30) {
|
---|
| 722 | for (i=31; i>=brd.bitlen; i--) {
|
---|
| 723 | if (brd_len == -1)
|
---|
| 724 | brd.data[0] |= htonl(1<<(31-i));
|
---|
| 725 | else
|
---|
| 726 | brd.data[0] &= ~htonl(1<<(31-i));
|
---|
| 727 | }
|
---|
| 728 | addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &brd.data, brd.bytelen);
|
---|
| 729 | brd_len = brd.bytelen;
|
---|
| 730 | }
|
---|
| 731 | }
|
---|
| 732 | if (!scoped && cmd != RTM_DELADDR)
|
---|
| 733 | req.ifa.ifa_scope = default_scope(&lcl);
|
---|
| 734 |
|
---|
| 735 | xrtnl_open(&rth);
|
---|
| 736 |
|
---|
| 737 | ll_init_map(&rth);
|
---|
| 738 |
|
---|
| 739 | req.ifa.ifa_index = xll_name_to_index(d);
|
---|
| 740 |
|
---|
| 741 | if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
|
---|
| 742 | return 2;
|
---|
| 743 |
|
---|
| 744 | return 0;
|
---|
| 745 | }
|
---|
| 746 |
|
---|
| 747 | /* Return value becomes exitcode. It's okay to not return at all */
|
---|
| 748 | int FAST_FUNC do_ipaddr(char **argv)
|
---|
| 749 | {
|
---|
| 750 | static const char commands[] ALIGN1 =
|
---|
| 751 | "add\0""delete\0""list\0""show\0""lst\0""flush\0";
|
---|
| 752 | smalluint cmd = 2;
|
---|
| 753 | if (*argv) {
|
---|
| 754 | cmd = index_in_substrings(commands, *argv);
|
---|
| 755 | if (cmd > 5)
|
---|
| 756 | bb_error_msg_and_die(bb_msg_invalid_arg, *argv, applet_name);
|
---|
| 757 | argv++;
|
---|
| 758 | if (cmd <= 1)
|
---|
| 759 | return ipaddr_modify((cmd == 0) ? RTM_NEWADDR : RTM_DELADDR, argv);
|
---|
| 760 | }
|
---|
| 761 | /* 2 == list, 3 == show, 4 == lst */
|
---|
| 762 | return ipaddr_list_or_flush(argv, cmd == 5);
|
---|
| 763 | }
|
---|