2.6.26-stable review patch. If anyone has any objections, please let us know. ------------------ From: Herbert Xu netfilter: nf_nat_sip: c= is optional for session Upstream commit c71529e4: According to RFC2327, the connection information is optional in the session description since it can be specified in the media description instead. My provider does exactly that and does not provide any connection information in the session description. As a result the new kernel drops all invite responses. This patch makes it optional as documented. Signed-off-by: Herbert Xu Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/ipv4/netfilter/nf_nat_sip.c | 38 +++++++++++++++++++++++++------------- 1 file changed, 25 insertions(+), 13 deletions(-) --- a/net/ipv4/netfilter/nf_nat_sip.c +++ b/net/ipv4/netfilter/nf_nat_sip.c @@ -318,11 +318,11 @@ static int mangle_content_len(struct sk_ buffer, buflen); } -static unsigned mangle_sdp_packet(struct sk_buff *skb, const char **dptr, - unsigned int dataoff, unsigned int *datalen, - enum sdp_header_types type, - enum sdp_header_types term, - char *buffer, int buflen) +static int mangle_sdp_packet(struct sk_buff *skb, const char **dptr, + unsigned int dataoff, unsigned int *datalen, + enum sdp_header_types type, + enum sdp_header_types term, + char *buffer, int buflen) { enum ip_conntrack_info ctinfo; struct nf_conn *ct = nf_ct_get(skb, &ctinfo); @@ -330,9 +330,9 @@ static unsigned mangle_sdp_packet(struct if (ct_sip_get_sdp_header(ct, *dptr, dataoff, *datalen, type, term, &matchoff, &matchlen) <= 0) - return 0; + return -ENOENT; return mangle_packet(skb, dptr, datalen, matchoff, matchlen, - buffer, buflen); + buffer, buflen) ? 0 : -EINVAL; } static unsigned int ip_nat_sdp_addr(struct sk_buff *skb, const char **dptr, @@ -346,8 +346,8 @@ static unsigned int ip_nat_sdp_addr(stru unsigned int buflen; buflen = sprintf(buffer, NIPQUAD_FMT, NIPQUAD(addr->ip)); - if (!mangle_sdp_packet(skb, dptr, dataoff, datalen, type, term, - buffer, buflen)) + if (mangle_sdp_packet(skb, dptr, dataoff, datalen, type, term, + buffer, buflen)) return 0; return mangle_content_len(skb, dptr, datalen); @@ -381,15 +381,27 @@ static unsigned int ip_nat_sdp_session(s /* Mangle session description owner and contact addresses */ buflen = sprintf(buffer, "%u.%u.%u.%u", NIPQUAD(addr->ip)); - if (!mangle_sdp_packet(skb, dptr, dataoff, datalen, + if (mangle_sdp_packet(skb, dptr, dataoff, datalen, SDP_HDR_OWNER_IP4, SDP_HDR_MEDIA, buffer, buflen)) return 0; - if (!mangle_sdp_packet(skb, dptr, dataoff, datalen, - SDP_HDR_CONNECTION_IP4, SDP_HDR_MEDIA, - buffer, buflen)) + switch (mangle_sdp_packet(skb, dptr, dataoff, datalen, + SDP_HDR_CONNECTION_IP4, SDP_HDR_MEDIA, + buffer, buflen)) { + case 0: + /* + * RFC 2327: + * + * Session description + * + * c=* (connection information - not required if included in all media) + */ + case -ENOENT: + break; + default: return 0; + } return mangle_content_len(skb, dptr, datalen); } -- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/