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When receiving a STUN binding request send one out as the Google Talk client uses this as a method to determine if the remote party is still reachable or not.

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Failure to do this results in the Google Talk client ignoring RTP packets after a specific period of time. This is also done as a result of receiving a STUN binding request so that the username information can be used from the inbound request, thus not requiring it to be stored on a per candidate basis.

(closes issue ASTERISK-20107)
Reported by: Malcolm Davenport


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@369858 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Joshua Colp
2012-07-09 22:38:25 +00:00
parent 7baa8bf43d
commit 8f162be802
1 changed files with 6 additions and 1 deletions
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7
main/stun.c
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@@ -328,6 +328,7 @@ int ast_stun_handle_packet(int s, struct sockaddr_in *src, unsigned char *data,
struct stun_header *resp = (struct stun_header *)respdata; struct stun_header *resp = (struct stun_header *)respdata;
int resplen = 0; /* len excluding header */ int resplen = 0; /* len excluding header */
int respleft = sizeof(respdata) - sizeof(struct stun_header); int respleft = sizeof(respdata) - sizeof(struct stun_header);
char combined[33];
resp->id = hdr->id; resp->id = hdr->id;
resp->msgtype = 0; resp->msgtype = 0;
@@ -338,12 +339,16 @@ int ast_stun_handle_packet(int s, struct sockaddr_in *src, unsigned char *data,
if (stundebug) if (stundebug)
ast_verbose("STUN Bind Request, username: %s\n", ast_verbose("STUN Bind Request, username: %s\n",
st.username ? st.username : "<none>"); st.username ? st.username : "<none>");
if (st.username) if (st.username) {
append_attr_string(&attr, STUN_USERNAME, st.username, &resplen, &respleft); append_attr_string(&attr, STUN_USERNAME, st.username, &resplen, &respleft);
snprintf(combined, sizeof(combined), "%16s%16s", st.username + 16, st.username);
}
append_attr_address(&attr, STUN_MAPPED_ADDRESS, src, &resplen, &respleft); append_attr_address(&attr, STUN_MAPPED_ADDRESS, src, &resplen, &respleft);
resp->msglen = htons(resplen); resp->msglen = htons(resplen);
resp->msgtype = htons(STUN_BINDRESP); resp->msgtype = htons(STUN_BINDRESP);
stun_send(s, src, resp); stun_send(s, src, resp);
ast_stun_request(s, src, combined, NULL);
ret = AST_STUN_ACCEPT; ret = AST_STUN_ACCEPT;
break; break;
default: default: