summaryrefslogtreecommitdiff
path: root/networking/libiproute/ll_map.c
diff options
context:
space:
mode:
authorGlenn L McGrath2002-11-10 01:33:55 +0000
committerGlenn L McGrath2002-11-10 01:33:55 +0000
commit9a2d27249cc2235f7e001a9ea8d4605406bc5f38 (patch)
treeb7b2917c3cf46ac3fa25df5f9a27a9a9fbfb0398 /networking/libiproute/ll_map.c
parent021fa7db9139bff3b4bf404dfd7d2b1541ed71f8 (diff)
downloadbusybox-9a2d27249cc2235f7e001a9ea8d4605406bc5f38.zip
busybox-9a2d27249cc2235f7e001a9ea8d4605406bc5f38.tar.gz
IP applet by Bastian Blank <waldi@debian.org>
Diffstat (limited to 'networking/libiproute/ll_map.c')
-rw-r--r--networking/libiproute/ll_map.c169
1 files changed, 169 insertions, 0 deletions
diff --git a/networking/libiproute/ll_map.c b/networking/libiproute/ll_map.c
new file mode 100644
index 0000000..e5a95e6
--- /dev/null
+++ b/networking/libiproute/ll_map.c
@@ -0,0 +1,169 @@
+/*
+ * 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 <string.h>
+
+#include "libnetlink.h"
+#include "ll_map.h"
+
+struct idxmap
+{
+ struct idxmap * next;
+ int index;
+ int type;
+ int alen;
+ unsigned flags;
+ unsigned char addr[8];
+ char name[16];
+};
+
+static struct idxmap *idxmap[16];
+
+int ll_remember_index(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(int 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(int idx)
+{
+ static char nbuf[16];
+
+ return ll_idx_n2a(idx, nbuf);
+}
+
+int ll_index_to_type(int 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(int 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;
+}
+
+int ll_name_to_index(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 0;
+}
+
+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;
+}