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socket-util: re-implement socket_address_parse_netlink() by using extract_first_word()

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This drops support of trailing white space when a multicast group is
specified.

Fixes one of issues in #11738.
This commit is contained in:
Yu Watanabe 2019-02-17 03:27:57 +09:00 committed by Lennart Poettering
parent 09ba1fcc57
commit 528a74a1ad
2 changed files with 36 additions and 12 deletions
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21
src/basic/socket-util.c
View file

@ -235,23 +235,32 @@ int socket_address_parse_and_warn(SocketAddress *a, const char *s) {
}
int socket_address_parse_netlink(SocketAddress *a, const char *s) {
int family;
_cleanup_free_ char *word = NULL;
unsigned group = 0;
_cleanup_free_ char *sfamily = NULL;
int family, r;
assert(a);
assert(s);
zero(*a);
a->type = SOCK_RAW;
errno = 0;
if (sscanf(s, "%ms %u", &sfamily, &group) < 1)
return errno > 0 ? -errno : -EINVAL;
r = extract_first_word(&s, &word, NULL, 0);
if (r < 0)
return r;
if (r == 0)
return -EINVAL;
family = netlink_family_from_string(sfamily);
family = netlink_family_from_string(word);
if (family < 0)
return -EINVAL;
if (!isempty(s)) {
r = safe_atou(s, &group);
if (r < 0)
return r;
}
a->sockaddr.nl.nl_family = AF_NETLINK;
a->sockaddr.nl.nl_groups = group;

27
src/test/test-socket-util.c
View file

@ -164,20 +164,35 @@ static void test_socket_address_parse_netlink(void) {
assert_se(socket_address_parse_netlink(&a, "junk") < 0);
assert_se(socket_address_parse_netlink(&a, "") < 0);
assert_se(socket_address_parse_netlink(&a, "route") >= 0);
assert_se(a.sockaddr.nl.nl_family == AF_NETLINK);
assert_se(a.sockaddr.nl.nl_groups == 0);
assert_se(a.protocol == NETLINK_ROUTE);
assert_se(socket_address_parse_netlink(&a, "route") >= 0);
assert_se(socket_address_parse_netlink(&a, "route 10") >= 0);
assert_se(a.sockaddr.sa.sa_family == AF_NETLINK);
assert_se(a.sockaddr.nl.nl_family == AF_NETLINK);
assert_se(a.sockaddr.nl.nl_groups == 10);
assert_se(a.protocol == NETLINK_ROUTE);
/* With spaces and tabs */
assert_se(socket_address_parse_netlink(&a, " kobject-uevent ") >= 0);
assert_se(socket_address_parse_netlink(&a, " \t kobject-uevent \t 10 \t") >= 0);
assert_se(a.sockaddr.sa.sa_family == AF_NETLINK);
assert_se(a.sockaddr.nl.nl_family == AF_NETLINK);
assert_se(a.sockaddr.nl.nl_groups == 0);
assert_se(a.protocol == NETLINK_KOBJECT_UEVENT);
assert_se(socket_address_parse_netlink(&a, " \t kobject-uevent \t 10") >= 0);
assert_se(a.sockaddr.nl.nl_family == AF_NETLINK);
assert_se(a.sockaddr.nl.nl_groups == 10);
assert_se(a.protocol == NETLINK_KOBJECT_UEVENT);
assert_se(socket_address_parse_netlink(&a, "kobject-uevent\t10") >= 0);
assert_se(a.sockaddr.nl.nl_family == AF_NETLINK);
assert_se(a.sockaddr.nl.nl_groups == 10);
assert_se(a.protocol == NETLINK_KOBJECT_UEVENT);
assert_se(socket_address_parse_netlink(&a, "kobject-uevent\t10") >= 0);
assert_se(a.sockaddr.sa.sa_family == AF_NETLINK);
assert_se(a.protocol == NETLINK_KOBJECT_UEVENT);
/* trailing space is not supported */
assert_se(socket_address_parse_netlink(&a, "kobject-uevent\t10 ") < 0);
/* Group must be unsigned */
assert_se(socket_address_parse_netlink(&a, "kobject-uevent -1") < 0);
/* oss-fuzz #6884 */
assert_se(socket_address_parse_netlink(&a, "\xff") < 0);