[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit

Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/app/iproute2/iproute2-3.4.0/lib/ll_map.c b/ap/app/iproute2/iproute2-3.4.0/lib/ll_map.c
new file mode 100755
index 0000000..1ca781e
--- /dev/null
+++ b/ap/app/iproute2/iproute2-3.4.0/lib/ll_map.c
@@ -0,0 +1,215 @@
+/*
+ * 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 <linux/if.h>
+
+#include "libnetlink.h"
+#include "ll_map.h"
+
+extern unsigned int if_nametoindex (const char *);
+
+struct ll_cache
+{
+	struct ll_cache   *idx_next;
+	unsigned	flags;
+	int		index;
+	unsigned short	type;
+	unsigned short	alen;
+	char		name[IFNAMSIZ];
+	unsigned char	addr[20];
+};
+
+#define IDXMAP_SIZE	1024
+static struct ll_cache *idx_head[IDXMAP_SIZE];
+
+static inline struct ll_cache *idxhead(int idx)
+{
+	return idx_head[idx & (IDXMAP_SIZE - 1)];
+}
+
+int ll_remember_index(const struct sockaddr_nl *who,
+		      struct nlmsghdr *n, void *arg)
+{
+	int h;
+	struct ifinfomsg *ifi = NLMSG_DATA(n);
+	struct ll_cache *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 & (IDXMAP_SIZE - 1);
+	for (imp = &idx_head[h]; (im=*imp)!=NULL; imp = &im->idx_next)
+		if (im->index == ifi->ifi_index)
+			break;
+
+	if (im == NULL) {
+		im = malloc(sizeof(*im));
+		if (im == NULL)
+			return 0;
+		im->idx_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)
+{
+	const struct ll_cache *im;
+
+	if (idx == 0)
+		return "*";
+
+	for (im = idxhead(idx); im; im = im->idx_next)
+		if (im->index == idx)
+			return im->name;
+
+	snprintf(buf, IFNAMSIZ, "if%d", idx);
+	return buf;
+}
+
+
+const char *ll_index_to_name(unsigned idx)
+{
+	static char nbuf[IFNAMSIZ];
+
+	return ll_idx_n2a(idx, nbuf);
+}
+
+int ll_index_to_type(unsigned idx)
+{
+	const struct ll_cache *im;
+
+	if (idx == 0)
+		return -1;
+	for (im = idxhead(idx); im; im = im->idx_next)
+		if (im->index == idx)
+			return im->type;
+	return -1;
+}
+
+unsigned ll_index_to_flags(unsigned idx)
+{
+	const struct ll_cache *im;
+
+	if (idx == 0)
+		return 0;
+
+	for (im = idxhead(idx); im; im = im->idx_next)
+		if (im->index == idx)
+			return im->flags;
+	return 0;
+}
+
+unsigned ll_index_to_addr(unsigned idx, unsigned char *addr,
+			  unsigned alen)
+{
+	const struct ll_cache *im;
+
+	if (idx == 0)
+		return 0;
+
+	for (im = idxhead(idx); im; im = im->idx_next) {
+		if (im->index == idx) {
+			if (alen > sizeof(im->addr))
+				alen = sizeof(im->addr);
+			if (alen > im->alen)
+				alen = im->alen;
+			memcpy(addr, im->addr, alen);
+			return alen;
+		}
+	}
+	return 0;
+}
+
+unsigned ll_name_to_index(const char *name)
+{
+	static char ncache[IFNAMSIZ];
+	static int icache;
+	struct ll_cache *im;
+	int i;
+	unsigned idx;
+
+	if (name == NULL)
+		return 0;
+
+	if (icache && strcmp(name, ncache) == 0)
+		return icache;
+
+	for (i=0; i<IDXMAP_SIZE; i++) {
+		for (im = idx_head[i]; im; im = im->idx_next) {
+			if (strcmp(im->name, name) == 0) {
+				icache = im->index;
+				strcpy(ncache, name);
+				return im->index;
+			}
+		}
+	}
+
+	idx = if_nametoindex(name);
+	if (idx == 0)
+		sscanf(name, "if%u", &idx);
+	return idx;
+}
+
+int ll_init_map(struct rtnl_handle *rth)
+{
+	static int initialized;
+
+	if (initialized)
+		return 0;
+
+	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, NULL) < 0) {
+		fprintf(stderr, "Dump terminated\n");
+		exit(1);
+	}
+
+	initialized = 1;
+
+	return 0;
+}