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[NETFILTER]: nf_conntrack_sip: support method specific request/response handling

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Add support for per-method request/response handlers and perform SDP
parsing for INVITE/UPDATE requests and for all informational and
successful responses.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy
2008-03-25 20:22:20 -07:00
committed by David S. Miller
parent 7d3dd043b6
commit 30f33e6dee
2 changed files with 117 additions and 10 deletions
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20
include/linux/netfilter/nf_conntrack_sip.h
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@ -5,6 +5,25 @@
#define SIP_PORT 5060
#define SIP_TIMEOUT 3600
struct sip_handler {
const char *method;
unsigned int len;
int (*request)(struct sk_buff *skb,
const char **dptr, unsigned int *datalen,
unsigned int cseq);
int (*response)(struct sk_buff *skb,
const char **dptr, unsigned int *datalen,
unsigned int cseq, unsigned int code);
};
#define SIP_HANDLER(__method, __request, __response) \
{ \
.method = (__method), \
.len = sizeof(__method) - 1, \
.request = (__request), \
.response = (__response), \
}
struct sip_header {
const char *name;
const char *cname;
@ -35,6 +54,7 @@ struct sip_header {
__SIP_HDR(__name, NULL, __search, __match)
enum sip_header_types {
SIP_HDR_CSEQ,
SIP_HDR_FROM,
SIP_HDR_TO,
SIP_HDR_CONTACT,