csum: Remove unused parameter from calc_csum()

The `ccsum' parameter to calc_csum() is never used and is set to 0 by
all callers. There's no reason to keep it, so remove it.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

csum.h

@@ -19,8 +19,7 @@ static inline unsigned short csum(unsigned short *buf, int nwords)
 	return ~sum;
 }
 
-static inline uint16_t calc_csum(void *addr, size_t len,
-				 int ccsum __maybe_unused)
+static inline uint16_t calc_csum(void *addr, size_t len)
 {
 	return csum(addr, len >> 1);
 }

proto_icmpv4.c

@@ -39,7 +39,7 @@ static void icmp(struct pkt_buff *pkt)
 	if (icmp == NULL)
 		return;
 
-	csum = calc_csum(icmp, pkt_len(pkt) + sizeof(*icmp), 0);
+	csum = calc_csum(icmp, pkt_len(pkt) + sizeof(*icmp));
 
 	tprintf(" [ ICMP ");
 	tprintf("Type (%u), ", icmp->type);

proto_ipv4.c

@@ -48,7 +48,7 @@ static void ipv4(struct pkt_buff *pkt)
 
 	frag_off = ntohs(ip->h_frag_off);
 	h_tot_len = ntohs(ip->h_tot_len);
-	csum = calc_csum(ip, ip->h_ihl * 4, 0);
+	csum = calc_csum(ip, ip->h_ihl * 4);
 
 	inet_ntop(AF_INET, &ip->h_saddr, src_ip, sizeof(src_ip));
 	inet_ntop(AF_INET, &ip->h_daddr, dst_ip, sizeof(dst_ip));

trafgen.c

@@ -333,7 +333,7 @@ static void apply_csum16(int id)
 		switch (csum->which) {
 		case CSUM_IP:
 			sum = calc_csum(packets[id].payload + csum->from,
-					csum->to - csum->from + 1, 0);
+					csum->to - csum->from + 1);
 			break;
 		case CSUM_UDP:
 			sum = p4_csum((void *) packets[id].payload + csum->from,

trafgen_parser.y

@@ -190,7 +190,7 @@ static void __set_csum16_static(size_t from, size_t to, enum csum which __maybe_
 	uint16_t sum;
 	uint8_t *psum;
 
-	sum = htons(calc_csum(pkt->payload + from, to - from, 0));
+	sum = htons(calc_csum(pkt->payload + from, to - from));
 	psum = (uint8_t *) ∑
 
 	set_byte(psum[0]);