X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=extensions%2Flibipt_ULOG.c;fp=extensions%2Flibipt_ULOG.c;h=a73b685fcde32ce75f0c6425e3a46cd71ad31c17;hb=a7620a02aaaddfaf83581aade872df16b8724c62;hp=f4b7a14a0110acb1aa187eaa0941e0053fc56d03;hpb=34d283f916eeef73728a99668e40754f3961f580;p=iptables.git

diff --git a/extensions/libipt_ULOG.c b/extensions/libipt_ULOG.c
index f4b7a14..a73b685 100644
--- a/extensions/libipt_ULOG.c
+++ b/extensions/libipt_ULOG.c
@@ -110,6 +110,14 @@ static int parse(int c, char **argv, int invert, unsigned int *flags,
 				   "Maximum prefix length %u for --ulog-prefix",
 				   (unsigned int)sizeof(loginfo->prefix) - 1);
 
+		if (strlen(optarg) == 0)
+			exit_error(PARAMETER_PROBLEM,
+				   "No prefix specified for --ulog-prefix");
+
+		if (strlen(optarg) != strlen(strtok(optarg, "\n")))
+			exit_error(PARAMETER_PROBLEM,
+				   "Newlines not allowed in --ulog-prefix");
+
 		strcpy(loginfo->prefix, optarg);
 		*flags |= IPT_LOG_OPT_PREFIX;
 		break;