diff options
Diffstat (limited to 'checksum.c')
| -rw-r--r-- | checksum.c | 46 |
1 files changed, 23 insertions, 23 deletions
@@ -116,19 +116,19 @@ uint16_t csum_fold(uint32_t sum) /** * csum_ip4_header() - Calculate IPv4 header checksum - * @tot_len: IPv4 packet length (data + IP header, host order) + * @l3len: IPv4 packet length (host order) * @protocol: Protocol number * @saddr: IPv4 source address * @daddr: IPv4 destination address * * Return: 16-bit folded sum of the IPv4 header */ -uint16_t csum_ip4_header(uint16_t tot_len, uint8_t protocol, +uint16_t csum_ip4_header(uint16_t l3len, uint8_t protocol, struct in_addr saddr, struct in_addr daddr) { uint32_t sum = L2_BUF_IP4_PSUM(protocol); - sum += htons(tot_len); + sum += htons(l3len); sum += (saddr.s_addr >> 16) & 0xffff; sum += saddr.s_addr & 0xffff; sum += (daddr.s_addr >> 16) & 0xffff; @@ -140,13 +140,13 @@ uint16_t csum_ip4_header(uint16_t tot_len, uint8_t protocol, /** * proto_ipv4_header_psum() - Calculates the partial checksum of an * IPv4 header for UDP or TCP - * @tot_len: IPv4 Payload length (host order) + * @l4len: IPv4 Payload length (host order) * @proto: Protocol number * @saddr: Source address * @daddr: Destination address * Returns: Partial checksum of the IPv4 header */ -uint32_t proto_ipv4_header_psum(uint16_t tot_len, uint8_t protocol, +uint32_t proto_ipv4_header_psum(uint16_t l4len, uint8_t protocol, struct in_addr saddr, struct in_addr daddr) { uint32_t psum = htons(protocol); @@ -155,7 +155,7 @@ uint32_t proto_ipv4_header_psum(uint16_t tot_len, uint8_t protocol, psum += saddr.s_addr & 0xffff; psum += (daddr.s_addr >> 16) & 0xffff; psum += daddr.s_addr & 0xffff; - psum += htons(tot_len); + psum += htons(l4len); return psum; } @@ -165,22 +165,22 @@ uint32_t proto_ipv4_header_psum(uint16_t tot_len, uint8_t protocol, * @udp4hr: UDP header, initialised apart from checksum * @saddr: IPv4 source address * @daddr: IPv4 destination address - * @payload: ICMPv4 packet payload - * @len: Length of @payload (not including UDP) + * @payload: UDP packet payload + * @dlen: Length of @payload (not including UDP header) */ void csum_udp4(struct udphdr *udp4hr, struct in_addr saddr, struct in_addr daddr, - const void *payload, size_t len) + const void *payload, size_t dlen) { /* UDP checksums are optional, so don't bother */ udp4hr->check = 0; if (UDP4_REAL_CHECKSUMS) { - uint16_t tot_len = len + sizeof(struct udphdr); - uint32_t psum = proto_ipv4_header_psum(tot_len, IPPROTO_UDP, + uint16_t l4len = dlen + sizeof(struct udphdr); + uint32_t psum = proto_ipv4_header_psum(l4len, IPPROTO_UDP, saddr, daddr); psum = csum_unfolded(udp4hr, sizeof(struct udphdr), psum); - udp4hr->check = csum(payload, len, psum); + udp4hr->check = csum(payload, dlen, psum); } } @@ -188,9 +188,9 @@ void csum_udp4(struct udphdr *udp4hr, * csum_icmp4() - Calculate and set checksum for an ICMP packet * @icmp4hr: ICMP header, initialised apart from checksum * @payload: ICMP packet payload - * @len: Length of @payload (not including ICMP header) + * @dlen: Length of @payload (not including ICMP header) */ -void csum_icmp4(struct icmphdr *icmp4hr, const void *payload, size_t len) +void csum_icmp4(struct icmphdr *icmp4hr, const void *payload, size_t dlen) { uint32_t psum; @@ -199,7 +199,7 @@ void csum_icmp4(struct icmphdr *icmp4hr, const void *payload, size_t len) /* Partial checksum for ICMP header alone */ psum = sum_16b(icmp4hr, sizeof(*icmp4hr)); - icmp4hr->checksum = csum(payload, len, psum); + icmp4hr->checksum = csum(payload, dlen, psum); } /** @@ -227,18 +227,18 @@ uint32_t proto_ipv6_header_psum(uint16_t payload_len, uint8_t protocol, * csum_udp6() - Calculate and set checksum for a UDP over IPv6 packet * @udp6hr: UDP header, initialised apart from checksum * @payload: UDP packet payload - * @len: Length of @payload (not including UDP header) + * @dlen: Length of @payload (not including UDP header) */ void csum_udp6(struct udphdr *udp6hr, const struct in6_addr *saddr, const struct in6_addr *daddr, - const void *payload, size_t len) + const void *payload, size_t dlen) { - uint32_t psum = proto_ipv6_header_psum(len + sizeof(struct udphdr), + uint32_t psum = proto_ipv6_header_psum(dlen + sizeof(struct udphdr), IPPROTO_UDP, saddr, daddr); udp6hr->check = 0; psum = csum_unfolded(udp6hr, sizeof(struct udphdr), psum); - udp6hr->check = csum(payload, len, psum); + udp6hr->check = csum(payload, dlen, psum); } /** @@ -247,19 +247,19 @@ void csum_udp6(struct udphdr *udp6hr, * @saddr: IPv6 source address * @daddr: IPv6 destination address * @payload: ICMP packet payload - * @len: Length of @payload (not including ICMPv6 header) + * @dlen: Length of @payload (not including ICMPv6 header) */ void csum_icmp6(struct icmp6hdr *icmp6hr, const struct in6_addr *saddr, const struct in6_addr *daddr, - const void *payload, size_t len) + const void *payload, size_t dlen) { - uint32_t psum = proto_ipv6_header_psum(len + sizeof(*icmp6hr), + uint32_t psum = proto_ipv6_header_psum(dlen + sizeof(*icmp6hr), IPPROTO_ICMPV6, saddr, daddr); icmp6hr->icmp6_cksum = 0; /* Add in partial checksum for the ICMPv6 header alone */ psum += sum_16b(icmp6hr, sizeof(*icmp6hr)); - icmp6hr->icmp6_cksum = csum(payload, len, psum); + icmp6hr->icmp6_cksum = csum(payload, dlen, psum); } #ifdef __AVX2__ |