-/*
- * ll_map.c
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
- *
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <syslog.h>
-#include <fcntl.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <net/if.h>
-#include <string.h>
-
-#include "libnetlink.h"
-#include "ll_map.h"
-
-struct idxmap
-{
- struct idxmap * next;
- unsigned index;
- int type;
- int alen;
- unsigned flags;
- unsigned char addr[8];
- char name[16];
-};
-
-static struct idxmap *idxmap[16];
-
-int ll_remember_index(const struct sockaddr_nl *who,
- struct nlmsghdr *n, void *arg)
-{
- int h;
- struct ifinfomsg *ifi = NLMSG_DATA(n);
- struct idxmap *im, **imp;
- struct rtattr *tb[IFLA_MAX+1];
-
- if (n->nlmsg_type != RTM_NEWLINK)
- return 0;
-
- if (n->nlmsg_len < NLMSG_LENGTH(sizeof(ifi)))
- return -1;
-
-
- memset(tb, 0, sizeof(tb));
- parse_rtattr(tb, IFLA_MAX, IFLA_RTA(ifi), IFLA_PAYLOAD(n));
- if (tb[IFLA_IFNAME] == NULL)
- return 0;
-
- h = ifi->ifi_index&0xF;
-
- for (imp=&idxmap[h]; (im=*imp)!=NULL; imp = &im->next)
- if (im->index == ifi->ifi_index)
- break;
-
- if (im == NULL) {
- im = malloc(sizeof(*im));
- if (im == NULL)
- return 0;
- im->next = *imp;
- im->index = ifi->ifi_index;
- *imp = im;
- }
-
- im->type = ifi->ifi_type;
- im->flags = ifi->ifi_flags;
- if (tb[IFLA_ADDRESS]) {
- int alen;
- im->alen = alen = RTA_PAYLOAD(tb[IFLA_ADDRESS]);
- if (alen > sizeof(im->addr))
- alen = sizeof(im->addr);
- memcpy(im->addr, RTA_DATA(tb[IFLA_ADDRESS]), alen);
- } else {
- im->alen = 0;
- memset(im->addr, 0, sizeof(im->addr));
- }
- strcpy(im->name, RTA_DATA(tb[IFLA_IFNAME]));
- return 0;
-}
-
-const char *ll_idx_n2a(unsigned idx, char *buf)
-{
- struct idxmap *im;
-
- if (idx == 0)
- return "*";
- for (im = idxmap[idx&0xF]; im; im = im->next)
- if (im->index == idx)
- return im->name;
- snprintf(buf, 16, "if%d", idx);
- return buf;
-}
-
-
-const char *ll_index_to_name(unsigned idx)
-{
- static char nbuf[16];
-
- return ll_idx_n2a(idx, nbuf);
-}
-
-int ll_index_to_type(unsigned idx)
-{
- struct idxmap *im;
-
- if (idx == 0)
- return -1;
- for (im = idxmap[idx&0xF]; im; im = im->next)
- if (im->index == idx)
- return im->type;
- return -1;
-}
-
-unsigned ll_index_to_flags(unsigned idx)
-{
- struct idxmap *im;
-
- if (idx == 0)
- return 0;
-
- for (im = idxmap[idx&0xF]; im; im = im->next)
- if (im->index == idx)
- return im->flags;
- return 0;
-}
-
-unsigned ll_name_to_index(const char *name)
-{
- static char ncache[16];
- static int icache;
- struct idxmap *im;
- int i;
-
- if (name == NULL)
- return 0;
- if (icache && strcmp(name, ncache) == 0)
- return icache;
- for (i=0; i<16; i++) {
- for (im = idxmap[i]; im; im = im->next) {
- if (strcmp(im->name, name) == 0) {
- icache = im->index;
- strcpy(ncache, name);
- return im->index;
- }
- }
- }
-
- return if_nametoindex(name);
-}
-
-int ll_init_map(struct rtnl_handle *rth)
-{
- if (rtnl_wilddump_request(rth, AF_UNSPEC, RTM_GETLINK) < 0) {
- perror("Cannot send dump request");
- exit(1);
- }
-
- if (rtnl_dump_filter(rth, ll_remember_index, &idxmap, NULL, NULL) < 0) {
- fprintf(stderr, "Dump terminated\n");
- exit(1);
- }
- return 0;
-}