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[NETFILTER]: nf_conntrack_sip: parse SIP headers properly

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Introduce new function for SIP header parsing that properly deals with
continuation lines and whitespace in headers and use it.

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 20:18:57 -07:00
committed by David S. Miller
parent ac3677406d
commit ea45f12a27
3 changed files with 152 additions and 169 deletions
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30
include/linux/netfilter/nf_conntrack_sip.h
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@@ -5,14 +5,6 @@
#define SIP_PORT 5060
#define SIP_TIMEOUT 3600
enum sip_header_pos {
POS_FROM,
POS_TO,
POS_VIA,
POS_CONTACT,
POS_CONTENT,
};
struct sip_header {
const char *name;
const char *cname;
@@ -36,9 +28,20 @@ struct sip_header {
.match_len = (__match), \
}
#define SIP_HDR(__name, __cname, __search, __match) \
__SIP_HDR(__name, __cname, __search, __match)
#define SDP_HDR(__name, __search, __match) \
__SIP_HDR(__name, NULL, __search, __match)
enum sip_header_types {
SIP_HDR_FROM,
SIP_HDR_TO,
SIP_HDR_CONTACT,
SIP_HDR_VIA,
SIP_HDR_CONTENT_LENGTH,
};
enum sdp_header_types {
SDP_HDR_UNSPEC,
SDP_HDR_VERSION,
@@ -60,13 +63,10 @@ extern unsigned int (*nf_nat_sdp_hook)(struct sk_buff *skb,
extern int ct_sip_parse_request(const struct nf_conn *ct,
const char *dptr, unsigned int datalen,
unsigned int *matchoff, unsigned int *matchlen);
extern int ct_sip_get_info(const struct nf_conn *ct, const char *dptr,
size_t dlen, unsigned int *matchoff,
unsigned int *matchlen, enum sip_header_pos pos);
extern int ct_sip_lnlen(const char *line, const char *limit);
extern const char *ct_sip_search(const char *needle, const char *haystack,
size_t needle_len, size_t haystack_len,
int case_sensitive);
extern int ct_sip_get_header(const struct nf_conn *ct, const char *dptr,
unsigned int dataoff, unsigned int datalen,
enum sip_header_types type,
unsigned int *matchoff, unsigned int *matchlen);
extern int ct_sip_get_sdp_header(const struct nf_conn *ct, const char *dptr,
unsigned int dataoff, unsigned int datalen,