IP applet by Bastian Blank <waldi@debian.org>

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 000000000..e5a95e6a4
--- /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;
+}