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if we receive an INVITE with a Content-Length that is not a valid number, or is zero, then don't process the rest of the message body looking for an SDP

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closes issue #11475
Reported by: andrebarbosa



git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@108086 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Kevin P. Fleming
2008-03-12 19:16:07 +00:00
parent 4a8d87fe98
commit 988e55c13f
1 changed files with 15 additions and 0 deletions
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15
channels/chan_sip.c
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@@ -4856,6 +4856,7 @@ static void parse_request(struct sip_request *req)
static int find_sdp(struct sip_request *req)
{
const char *content_type;
const char *content_length;
const char *search;
char *boundary;
unsigned int x;
@@ -4863,6 +4864,20 @@ static int find_sdp(struct sip_request *req)
int found_application_sdp = FALSE;
int found_end_of_headers = FALSE;
content_length = get_header(req, "Content-Length");
if (!ast_strlen_zero(content_length)) {
if (sscanf(content_length, "%ud", &x) != 1) {
ast_log(LOG_WARNING, "Invalid Content-Length: %s\n", content_length);
return 0;
}
/* Content-Length of zero means there can't possibly be an
SDP here, even if the Content-Type says there is */
if (x == 0)
return 0;
}
content_type = get_header(req, "Content-Type");
/* if the body contains only SDP, this is easy */