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| author | Denys Vlasenko <vda.linux@googlemail.com> | 2010-04-02 07:04:44 +0200 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2010-04-02 07:04:44 +0200 |
| commit | 37201213ca45f2163abed70a213bb24956b243a8 (patch) | |
| tree | b0fb9484e8c322b272e2b07fc31904611d03afdd | |
| parent | b38af7bd31d98dd6e849354ee94ebafe580e7cc1 (diff) | |
| download | busybox-37201213ca45f2163abed70a213bb24956b243a8.tar.gz | |
ifplugd: more robust interface name match check
function old new delta
check_existence_through_netlink 278 308 +30
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
| -rw-r--r-- | networking/ifplugd.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/networking/ifplugd.c b/networking/ifplugd.c index f398cca22..41b04c4ed 100644 --- a/networking/ifplugd.c +++ b/networking/ifplugd.c @@ -485,8 +485,10 @@ static smallint detect_link(void) static NOINLINE int check_existence_through_netlink(void) { + int iface_len; char replybuf[1024]; + iface_len = strlen(G.iface); while (1) { struct nlmsghdr *mhdr; ssize_t bytes; @@ -526,8 +528,9 @@ static NOINLINE int check_existence_through_netlink(void) int len = RTA_PAYLOAD(attr); if (len > IFNAMSIZ) len = IFNAMSIZ; - - if (strncmp(G.iface, RTA_DATA(attr), len) == 0) { + if (iface_len <= len + && strncmp(G.iface, RTA_DATA(attr), len) == 0 + ) { G.iface_exists = (mhdr->nlmsg_type == RTM_NEWLINK); } } |