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iplink: forbid negative ifindex and modifying ifindex

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Cc: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
This commit is contained in:
WANG Cong 2014-09-05 16:36:14 -07:00 committed by Stephen Hemminger
parent 9464a5f26c
commit 3c682146ae
1 changed files with 8 additions and 1 deletions
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9
ip/iplink.c
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@ -400,6 +400,8 @@ int iplink_parse(int argc, char **argv, struct iplink_req *req,
} else if (strcmp(*argv, "index") == 0) {
NEXT_ARG();
*index = atoi(*argv);
if (*index < 0)
invarg("Invalid \"index\" value", *argv);
} else if (matches(*argv, "link") == 0) {
NEXT_ARG();
*link = *argv;
@ -607,7 +609,7 @@ static int iplink_modify(int cmd, unsigned int flags, int argc, char **argv)
char *name = NULL;
char *link = NULL;
char *type = NULL;
int index = 0;
int index = -1;
int group;
struct link_util *lu = NULL;
struct iplink_req req;
@ -658,6 +660,11 @@ static int iplink_modify(int cmd, unsigned int flags, int argc, char **argv)
"argument is required.\n");
exit(-1);
}
if (cmd == RTM_NEWLINK && index != -1) {
fprintf(stderr, "index can be used only when "
"creating devices.\n");
exit(-1);
}
req.i.ifi_index = ll_name_to_index(dev);
if (req.i.ifi_index == 0) {