netfilter: nf_nat_snmp_basic: remove debug parameter

To see debug message of nf_nat_snmp_basic, we should set debug value
when we insert this module. but it is inconvenient and only using of
the dynamic debugging is enough to debug.

This patch just removes debug code. then in the next patch, debugging code
will be added.

Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

net/ipv4/netfilter/nf_nat_snmp_basic.c

@@ -66,7 +66,6 @@ MODULE_ALIAS("ip_nat_snmp_basic");
 #define SNMP_TRAP_PORT 162
 #define NOCT1(n) (*(u8 *)(n))
 
-static int debug;
 static DEFINE_SPINLOCK(snmp_lock);
 
 /*
@@ -888,23 +887,13 @@ static inline void mangle_address(unsigned char *begin,
 				  __sum16 *check)
 {
 	if (map->from == NOCT1(addr)) {
-		u_int32_t old;
-
-		if (debug)
-			memcpy(&old, addr, sizeof(old));
-
 		*addr = map->to;
 
 		/* Update UDP checksum if being used */
 		if (*check) {
 			fast_csum(check,
 				  &map->from, &map->to, addr - begin);
-
 		}
-
-		if (debug)
-			printk(KERN_DEBUG "bsalg: mapped %pI4 to %pI4\n",
-			       &old, addr);
 	}
 }
 
@@ -995,10 +984,6 @@ static int snmp_parse_mangle(unsigned char *msg,
 	struct asn1_octstr comm;
 	struct snmp_object *obj;
 
-	if (debug > 1)
-		print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_NONE, 16, 1,
-			       msg, len, 0);
-
 	asn1_open(&ctx, msg, len);
 
 	/*
@@ -1018,8 +1003,6 @@ static int snmp_parse_mangle(unsigned char *msg,
 		return 0;
 	if (!asn1_uint_decode (&ctx, end, &vers))
 		return 0;
-	if (debug > 1)
-		pr_debug("bsalg: snmp version: %u\n", vers + 1);
 	if (vers > 1)
 		return 1;
 
@@ -1032,14 +1015,6 @@ static int snmp_parse_mangle(unsigned char *msg,
 		return 0;
 	if (!asn1_octets_decode(&ctx, end, &comm.data, &comm.len))
 		return 0;
-	if (debug > 1) {
-		unsigned int i;
-
-		pr_debug("bsalg: community: ");
-		for (i = 0; i < comm.len; i++)
-			pr_cont("%c", comm.data[i]);
-		pr_cont("\n");
-	}
 	kfree(comm.data);
 
 	/*
@@ -1049,23 +1024,6 @@ static int snmp_parse_mangle(unsigned char *msg,
 		return 0;
 	if (cls != ASN1_CTX || con != ASN1_CON)
 		return 0;
-	if (debug > 1) {
-		static const unsigned char *const pdus[] = {
-			[SNMP_PDU_GET] = "get",
-			[SNMP_PDU_NEXT] = "get-next",
-			[SNMP_PDU_RESPONSE] = "response",
-			[SNMP_PDU_SET] = "set",
-			[SNMP_PDU_TRAP1] = "trapv1",
-			[SNMP_PDU_BULK] = "bulk",
-			[SNMP_PDU_INFORM] = "inform",
-			[SNMP_PDU_TRAP2] = "trapv2"
-		};
-
-		if (pdutype > SNMP_PDU_TRAP2)
-			pr_debug("bsalg: bad pdu type %u\n", pdutype);
-		else
-			pr_debug("bsalg: pdu: %s\n", pdus[pdutype]);
-	}
 	if (pdutype != SNMP_PDU_RESPONSE &&
 	    pdutype != SNMP_PDU_TRAP1 && pdutype != SNMP_PDU_TRAP2)
 		return 1;
@@ -1088,11 +1046,6 @@ static int snmp_parse_mangle(unsigned char *msg,
 
 		if (!snmp_request_decode(&ctx, &req))
 			return 0;
-
-		if (debug > 1)
-			pr_debug("bsalg: request: id=0x%lx error_status=%u "
-			"error_index=%u\n", req.id, req.error_status,
-			req.error_index);
 	}
 
 	/*
@@ -1105,8 +1058,6 @@ static int snmp_parse_mangle(unsigned char *msg,
 		return 0;
 
 	while (!asn1_eoc_decode(&ctx, eoc)) {
-		unsigned int i;
-
 		if (!snmp_object_decode(&ctx, &obj)) {
 			if (obj) {
 				kfree(obj->id);
@@ -1115,17 +1066,6 @@ static int snmp_parse_mangle(unsigned char *msg,
 			return 0;
 		}
 
-		if (debug > 1) {
-			pr_debug("bsalg: object: ");
-			for (i = 0; i < obj->id_len; i++) {
-				if (i > 0)
-					pr_cont(".");
-				pr_cont("%lu", obj->id[i]);
-			}
-			pr_cont(": type=%u\n", obj->type);
-
-		}
-
 		if (obj->type == SNMP_IPADDR)
 			mangle_address(ctx.begin, ctx.pointer - 4, map, check);
 
@@ -1252,5 +1192,3 @@ static void __exit nf_nat_snmp_basic_fini(void)
 
 module_init(nf_nat_snmp_basic_init);
 module_exit(nf_nat_snmp_basic_fini);
-
-module_param(debug, int, 0600);