netfilter: replace strnicmp with strncasecmp

The kernel used to contain two functions for length-delimited,
case-insensitive string comparison, strnicmp with correct semantics and
a slightly buggy strncasecmp.  The latter is the POSIX name, so strnicmp
was renamed to strncasecmp, and strnicmp made into a wrapper for the new
strncasecmp to avoid breaking existing users.

To allow the compat wrapper strnicmp to be removed at some point in the
future, and to avoid the extra indirection cost, do
s/strnicmp/strncasecmp/g.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

net/netfilter/ipvs/ip_vs_ftp.c

@@ -96,13 +96,13 @@ static int ip_vs_ftp_get_addrport(char *data, char *data_limit,
 
 	if (data_limit - data < plen) {
 		/* check if there is partial match */
-		if (strnicmp(data, pattern, data_limit - data) == 0)
+		if (strncasecmp(data, pattern, data_limit - data) == 0)
 			return -1;
 		else
 			return 0;
 	}
 
-	if (strnicmp(data, pattern, plen) != 0) {
+	if (strncasecmp(data, pattern, plen) != 0) {
 		return 0;
 	}
 	s = data + plen;
@@ -354,7 +354,7 @@ static int ip_vs_ftp_in(struct ip_vs_app *app, struct ip_vs_conn *cp,
 	data_limit = skb_tail_pointer(skb);
 
 	while (data <= data_limit - 6) {
-		if (strnicmp(data, "PASV\r\n", 6) == 0) {
+		if (strncasecmp(data, "PASV\r\n", 6) == 0) {
 			/* Passive mode on */
 			IP_VS_DBG(7, "got PASV at %td of %td\n",
 				  data - data_start,

net/netfilter/nf_conntrack_ftp.c

@@ -304,12 +304,12 @@ static int find_pattern(const char *data, size_t dlen,
 
 	if (dlen <= plen) {
 		/* Short packet: try for partial? */
-		if (strnicmp(data, pattern, dlen) == 0)
+		if (strncasecmp(data, pattern, dlen) == 0)
 			return -1;
 		else return 0;
 	}
 
-	if (strnicmp(data, pattern, plen) != 0) {
+	if (strncasecmp(data, pattern, plen) != 0) {
 #if 0
 		size_t i;
 

net/netfilter/nf_conntrack_sip.c

@@ -247,7 +247,7 @@ int ct_sip_parse_request(const struct nf_conn *ct,
 	for (; dptr < limit - strlen("sip:"); dptr++) {
 		if (*dptr == '\r' || *dptr == '\n')
 			return -1;
-		if (strnicmp(dptr, "sip:", strlen("sip:")) == 0) {
+		if (strncasecmp(dptr, "sip:", strlen("sip:")) == 0) {
 			dptr += strlen("sip:");
 			break;
 		}
@@ -350,7 +350,7 @@ static const char *ct_sip_header_search(const char *dptr, const char *limit,
 			continue;
 		}
 
-		if (strnicmp(dptr, needle, len) == 0)
+		if (strncasecmp(dptr, needle, len) == 0)
 			return dptr;
 	}
 	return NULL;
@@ -383,10 +383,10 @@ int ct_sip_get_header(const struct nf_conn *ct, const char *dptr,
 		/* Find header. Compact headers must be followed by a
 		 * non-alphabetic character to avoid mismatches. */
 		if (limit - dptr >= hdr->len &&
-		    strnicmp(dptr, hdr->name, hdr->len) == 0)
+		    strncasecmp(dptr, hdr->name, hdr->len) == 0)
 			dptr += hdr->len;
 		else if (hdr->cname && limit - dptr >= hdr->clen + 1 &&
-			 strnicmp(dptr, hdr->cname, hdr->clen) == 0 &&
+			 strncasecmp(dptr, hdr->cname, hdr->clen) == 0 &&
 			 !isalpha(*(dptr + hdr->clen)))
 			dptr += hdr->clen;
 		else
@@ -620,9 +620,9 @@ static int ct_sip_parse_transport(struct nf_conn *ct, const char *dptr,
 
 	if (ct_sip_parse_param(ct, dptr, dataoff, datalen, "transport=",
 			       &matchoff, &matchlen)) {
-		if (!strnicmp(dptr + matchoff, "TCP", strlen("TCP")))
+		if (!strncasecmp(dptr + matchoff, "TCP", strlen("TCP")))
 			*proto = IPPROTO_TCP;
-		else if (!strnicmp(dptr + matchoff, "UDP", strlen("UDP")))
+		else if (!strncasecmp(dptr + matchoff, "UDP", strlen("UDP")))
 			*proto = IPPROTO_UDP;
 		else
 			return 0;
@@ -743,10 +743,10 @@ int ct_sip_get_sdp_header(const struct nf_conn *ct, const char *dptr,
 
 		if (term != SDP_HDR_UNSPEC &&
 		    limit - dptr >= thdr->len &&
-		    strnicmp(dptr, thdr->name, thdr->len) == 0)
+		    strncasecmp(dptr, thdr->name, thdr->len) == 0)
 			break;
 		else if (limit - dptr >= hdr->len &&
-			 strnicmp(dptr, hdr->name, hdr->len) == 0)
+			 strncasecmp(dptr, hdr->name, hdr->len) == 0)
 			dptr += hdr->len;
 		else
 			continue;
@@ -1394,7 +1394,7 @@ static int process_sip_response(struct sk_buff *skb, unsigned int protoff,
 		if (handler->response == NULL)
 			continue;
 		if (*datalen < matchend + handler->len ||
-		    strnicmp(*dptr + matchend, handler->method, handler->len))
+		    strncasecmp(*dptr + matchend, handler->method, handler->len))
 			continue;
 		return handler->response(skb, protoff, dataoff, dptr, datalen,
 					 cseq, code);
@@ -1435,7 +1435,7 @@ static int process_sip_request(struct sk_buff *skb, unsigned int protoff,
 		if (handler->request == NULL)
 			continue;
 		if (*datalen < handler->len ||
-		    strnicmp(*dptr, handler->method, handler->len))
+		    strncasecmp(*dptr, handler->method, handler->len))
 			continue;
 
 		if (ct_sip_get_header(ct, *dptr, 0, *datalen, SIP_HDR_CSEQ,
@@ -1462,7 +1462,7 @@ static int process_sip_msg(struct sk_buff *skb, struct nf_conn *ct,
 	const struct nf_nat_sip_hooks *hooks;
 	int ret;
 
-	if (strnicmp(*dptr, "SIP/2.0 ", strlen("SIP/2.0 ")) != 0)
+	if (strncasecmp(*dptr, "SIP/2.0 ", strlen("SIP/2.0 ")) != 0)
 		ret = process_sip_request(skb, protoff, dataoff, dptr, datalen);
 	else
 		ret = process_sip_response(skb, protoff, dataoff, dptr, datalen);

net/netfilter/nf_log.c

@@ -30,7 +30,7 @@ static struct nf_logger *__find_logger(int pf, const char *str_logger)
 
 		log = rcu_dereference_protected(loggers[pf][i],
 						lockdep_is_held(&nf_log_mutex));
-		if (!strnicmp(str_logger, log->name, strlen(log->name)))
+		if (!strncasecmp(str_logger, log->name, strlen(log->name)))
 			return log;
 	}
 

net/netfilter/nf_nat_sip.c

@@ -155,7 +155,7 @@ static unsigned int nf_nat_sip(struct sk_buff *skb, unsigned int protoff,
 	int request, in_header;
 
 	/* Basic rules: requests and responses. */
-	if (strnicmp(*dptr, "SIP/2.0", strlen("SIP/2.0")) != 0) {
+	if (strncasecmp(*dptr, "SIP/2.0", strlen("SIP/2.0")) != 0) {
 		if (ct_sip_parse_request(ct, *dptr, *datalen,
 					 &matchoff, &matchlen,
 					 &addr, &port) > 0 &&