[NETFILTER]: nf_conntrack_sip: use strlen/strcmp
Replace sizeof/memcmp by strlen/strcmp. Use case-insensitive comparison
for SIP methods and the SIP/2.0 string, as specified in RFC 3261.
Signed-off-by: Patrick McHardy <kaber@xxxxxxxxx>
---
commit 9896edea1c747be496854039a846ad61193ecadd
tree 40d97595577407c336f378eb2ec85390828a5afc
parent ee0b2a3c7a34c1c09e96b5601d8e8ce46861e808
author Patrick McHardy <kaber@xxxxxxxxx> Thu, 28 Feb 2008 12:08:20 +0100
committer Patrick McHardy <kaber@xxxxxxxxx> Thu, 28 Feb 2008 12:08:20 +0100
net/ipv4/netfilter/nf_nat_sip.c | 12 ++++++------
net/netfilter/nf_conntrack_sip.c | 12 ++++++------
2 files changed, 12 insertions(+), 12 deletions(-)
diff --git a/net/ipv4/netfilter/nf_nat_sip.c b/net/ipv4/netfilter/nf_nat_sip.c
index acaa7d4..dd1b2d8 100644
--- a/net/ipv4/netfilter/nf_nat_sip.c
+++ b/net/ipv4/netfilter/nf_nat_sip.c
@@ -94,12 +94,12 @@ static int map_sip_addr(struct sk_buff *skb,
if ((matchlen == map->addr[dir].srciplen ||
matchlen == map->addr[dir].srclen) &&
- memcmp(*dptr + matchoff, map->addr[dir].src, matchlen) == 0) {
+ strncmp(*dptr + matchoff, map->addr[dir].src, matchlen) == 0) {
addr = map->addr[!dir].dst;
addrlen = map->addr[!dir].dstlen;
} else if ((matchlen == map->addr[dir].dstiplen ||
matchlen == map->addr[dir].dstlen) &&
- memcmp(*dptr + matchoff, map->addr[dir].dst, matchlen) == 0) {
+ strncmp(*dptr + matchoff, map->addr[dir].dst, matchlen) == 0) {
addr = map->addr[!dir].src;
addrlen = map->addr[!dir].srclen;
} else
@@ -117,20 +117,20 @@ static unsigned int ip_nat_sip(struct sk_buff *skb,
enum sip_header_pos pos;
struct addr_map map;
- if (*datalen < sizeof("SIP/2.0") - 1)
+ if (*datalen < strlen("SIP/2.0"))
return NF_ACCEPT;
addr_map_init(ct, &map);
/* Basic rules: requests and responses. */
- if (strncmp(*dptr, "SIP/2.0", sizeof("SIP/2.0") - 1) != 0) {
+ if (strnicmp(*dptr, "SIP/2.0", strlen("SIP/2.0")) != 0) {
/* 10.2: Constructing the REGISTER Request:
*
* The "userinfo" and "@" components of the SIP URI MUST NOT
* be present.
*/
- if (*datalen >= sizeof("REGISTER") - 1 &&
- strncmp(*dptr, "REGISTER", sizeof("REGISTER") - 1) == 0)
+ if (*datalen >= strlen("REGISTER") &&
+ strnicmp(*dptr, "REGISTER", strlen("REGISTER")) == 0)
pos = POS_REG_REQ_URI;
else
pos = POS_REQ_URI;
diff --git a/net/netfilter/nf_conntrack_sip.c b/net/netfilter/nf_conntrack_sip.c
index b273225..d8e5867 100644
--- a/net/netfilter/nf_conntrack_sip.c
+++ b/net/netfilter/nf_conntrack_sip.c
@@ -443,15 +443,15 @@ static int sip_help(struct sk_buff *skb,
}
datalen = skb->len - dataoff;
- if (datalen < sizeof("SIP/2.0 200") - 1)
+ if (datalen < strlen("SIP/2.0 200"))
goto out;
/* RTP info only in some SDP pkts */
- if (memcmp(dptr, "INVITE", sizeof("INVITE") - 1) != 0 &&
- memcmp(dptr, "UPDATE", sizeof("UPDATE") - 1) != 0 &&
- memcmp(dptr, "SIP/2.0 180", sizeof("SIP/2.0 180") - 1) != 0 &&
- memcmp(dptr, "SIP/2.0 183", sizeof("SIP/2.0 183") - 1) != 0 &&
- memcmp(dptr, "SIP/2.0 200", sizeof("SIP/2.0 200") - 1) != 0) {
+ if (strnicmp(dptr, "INVITE", strlen("INVITE")) != 0 &&
+ strnicmp(dptr, "UPDATE", strlen("UPDATE")) != 0 &&
+ strnicmp(dptr, "SIP/2.0 180", strlen("SIP/2.0 180")) != 0 &&
+ strnicmp(dptr, "SIP/2.0 183", strlen("SIP/2.0 183")) != 0 &&
+ strnicmp(dptr, "SIP/2.0 200", strlen("SIP/2.0 200")) != 0) {
goto out;
}
/* Get address and port from SDP packet. */
-
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