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Handle capability stanzas that fail to provide node or version information

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While XEP-0115 states that the node and ver attributes are both required, some
devices fail to provide either field.  Prior to this patch, failure to provide
the node or ver attribute would cause a crash in res_xmpp.  While failing to
provide the node or ver attribute is technically invalid, since this
information is not utilized by Asterisk except for reporting purposes, for
interoperability reasons, we continue to process the capability stanza anyways.

(closes issue ASTERISK-20495)
Reported by: Martin W
Tested by: Martin W
patches:
  20495.patch uploaded by Martin W (license #6434)



git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/11@374622 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Matthew Jordan
2012-10-06 03:20:56 +00:00
parent a7a10088f3
commit 55b8cd2ec9
1 changed files with 7 additions and 2 deletions
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9
res/res_xmpp.c
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@@ -3142,8 +3142,13 @@ static int xmpp_pak_presence(struct ast_xmpp_client *client, struct ast_xmpp_cli
}
if ((node && strcmp(resource->caps.node, node)) || (ver && strcmp(resource->caps.version, ver))) {
ast_copy_string(resource->caps.node, node, sizeof(resource->caps.node));
ast_copy_string(resource->caps.version, ver, sizeof(resource->caps.version));
/* For interoperability reasons, proceed even if the resource fails to provide node or version */
if (node) {
ast_copy_string(resource->caps.node, node, sizeof(resource->caps.node));
}
if (ver) {
ast_copy_string(resource->caps.version, ver, sizeof(resource->caps.version));
}
/* Google Talk places the capabilities information directly in presence, so see if it is there */
if (iks_find_with_attrib(pak->x, "c", "node", "http://www.google.com/xmpp/client/caps") ||