Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-next-2.6

[net-next-2.6.git] / net / netfilter / nf_conntrack_sip.c

diff --git a/net/netfilter/nf_conntrack_sip.c b/net/netfilter/nf_conntrack_sip.c
index f64de95448669242cf23ac5d8a38987c2f8cd344..bcf47eb518effb4645440a6f64726089984eaeb7 100644 (file)
--- a/net/netfilter/nf_conntrack_sip.c
+++ b/net/netfilter/nf_conntrack_sip.c
@@ -130,6 +130,44 @@ static int digits_len(const struct nf_conn *ct, const char *dptr,
        return len;
 }
 
+static int iswordc(const char c)
+{
+       if (isalnum(c) || c == '!' || c == '"' || c == '%' ||
+           (c >= '(' && c <= '/') || c == ':' || c == '<' || c == '>' ||
+           c == '?' || (c >= '[' && c <= ']') || c == '_' || c == '`' ||
+           c == '{' || c == '}' || c == '~')
+               return 1;
+       return 0;
+}
+
+static int word_len(const char *dptr, const char *limit)
+{
+       int len = 0;
+       while (dptr < limit && iswordc(*dptr)) {
+               dptr++;
+               len++;
+       }
+       return len;
+}
+
+static int callid_len(const struct nf_conn *ct, const char *dptr,
+                     const char *limit, int *shift)
+{
+       int len, domain_len;
+
+       len = word_len(dptr, limit);
+       dptr += len;
+       if (!len || dptr == limit || *dptr != '@')
+               return len;
+       dptr++;
+       len++;
+
+       domain_len = word_len(dptr, limit);
+       if (!domain_len)
+               return 0;
+       return len + domain_len;
+}
+
 /* get media type + port length */
 static int media_len(const struct nf_conn *ct, const char *dptr,
                     const char *limit, int *shift)
@@ -152,6 +190,9 @@ static int parse_addr(const struct nf_conn *ct, const char *cp,
        const char *end;
        int ret = 0;
 
+       if (!ct)
+               return 0;
+
        memset(addr, 0, sizeof(*addr));
        switch (nf_ct_l3num(ct)) {
        case AF_INET:
@@ -296,6 +337,7 @@ static const struct sip_header ct_sip_hdrs[] = {
        [SIP_HDR_VIA_TCP]               = SIP_HDR("Via", "v", "TCP ", epaddr_len),
        [SIP_HDR_EXPIRES]               = SIP_HDR("Expires", NULL, NULL, digits_len),
        [SIP_HDR_CONTENT_LENGTH]        = SIP_HDR("Content-Length", "l", NULL, digits_len),
+       [SIP_HDR_CALL_ID]               = SIP_HDR("Call-Id", "i", NULL, callid_len),
 };
 
 static const char *sip_follow_continuation(const char *dptr, const char *limit)