[NETFILTER]: nf_conntrack_sip: support multiple media channels

Add support for multiple media channels and use it to create
expectations for video streams when present.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 14 insertions, 0 deletions

diff --git a/include/linux/netfilter/nf_conntrack_sip.h b/include/linux/netfilter/nf_conntrack_sip.h
index eca3ad3f28dc..71fa3eb5f485 100644
--- a/include/linux/netfilter/nf_conntrack_sip.h
+++ b/include/linux/netfilter/nf_conntrack_sip.h
@@ -12,10 +12,24 @@ struct nf_ct_sip_master {
 enum sip_expectation_classes {
         SIP_EXPECT_SIGNALLING,
         SIP_EXPECT_AUDIO,
+        SIP_EXPECT_VIDEO,
         __SIP_EXPECT_MAX
 };
 #define SIP_EXPECT_MAX  (__SIP_EXPECT_MAX - 1)
 
+struct sdp_media_type {
+        const char                      *name;
+        unsigned int                    len;
+        enum sip_expectation_classes    class;
+};
+
+#define SDP_MEDIA_TYPE(__name, __class)                                 \
+{                                                                       \
+        .name   = (__name),                                             \
+        .len    = sizeof(__name) - 1,                                   \
+        .class  = (__class),                                            \
+}
+
 struct sip_handler {
         const char      *method;
         unsigned int    len;