diff options
Diffstat (limited to 'tcp.c')
| -rw-r--r-- | tcp.c | 42 |
1 files changed, 22 insertions, 20 deletions
@@ -757,32 +757,34 @@ static void tcp_sock_set_bufsize(const struct ctx *c, int s) /** * tcp_update_check_tcp4() - Update TCP checksum from stored one * @iph: IPv4 header - * @th: TCP header followed by TCP payload + * @bp: TCP header followed by TCP payload */ -static void tcp_update_check_tcp4(const struct iphdr *iph, struct tcphdr *th) +static void tcp_update_check_tcp4(const struct iphdr *iph, + struct tcp_payload_t *bp) { uint16_t l4len = ntohs(iph->tot_len) - sizeof(struct iphdr); struct in_addr saddr = { .s_addr = iph->saddr }; struct in_addr daddr = { .s_addr = iph->daddr }; uint32_t sum = proto_ipv4_header_psum(l4len, IPPROTO_TCP, saddr, daddr); - th->check = 0; - th->check = csum(th, l4len, sum); + bp->th.check = 0; + bp->th.check = csum(bp, l4len, sum); } /** * tcp_update_check_tcp6() - Calculate TCP checksum for IPv6 * @ip6h: IPv6 header - * @th: TCP header followed by TCP payload + * @bp: TCP header followed by TCP payload */ -static void tcp_update_check_tcp6(struct ipv6hdr *ip6h, struct tcphdr *th) +static void tcp_update_check_tcp6(const struct ipv6hdr *ip6h, + struct tcp_payload_t *bp) { uint16_t l4len = ntohs(ip6h->payload_len); uint32_t sum = proto_ipv6_header_psum(l4len, IPPROTO_TCP, &ip6h->saddr, &ip6h->daddr); - th->check = 0; - th->check = csum(th, l4len, sum); + bp->th.check = 0; + bp->th.check = csum(bp, l4len, sum); } /** @@ -902,7 +904,7 @@ static void tcp_fill_header(struct tcphdr *th, * @conn: Connection pointer * @taph: tap backend specific header * @iph: Pointer to IPv4 header - * @th: Pointer to TCP header + * @bp: Pointer to TCP header followed by TCP payload * @dlen: TCP payload length * @check: Checksum, if already known * @seq: Sequence number for this segment @@ -912,14 +914,14 @@ static void tcp_fill_header(struct tcphdr *th, */ static size_t tcp_fill_headers4(const struct tcp_tap_conn *conn, struct tap_hdr *taph, - struct iphdr *iph, struct tcphdr *th, + struct iphdr *iph, struct tcp_payload_t *bp, size_t dlen, const uint16_t *check, uint32_t seq, bool no_tcp_csum) { const struct flowside *tapside = TAPFLOW(conn); const struct in_addr *src4 = inany_v4(&tapside->oaddr); const struct in_addr *dst4 = inany_v4(&tapside->eaddr); - size_t l4len = dlen + sizeof(*th); + size_t l4len = dlen + sizeof(bp->th); size_t l3len = l4len + sizeof(*iph); ASSERT(src4 && dst4); @@ -931,12 +933,12 @@ static size_t tcp_fill_headers4(const struct tcp_tap_conn *conn, iph->check = check ? *check : csum_ip4_header(l3len, IPPROTO_TCP, *src4, *dst4); - tcp_fill_header(th, conn, seq); + tcp_fill_header(&bp->th, conn, seq); if (no_tcp_csum) - th->check = 0; + bp->th.check = 0; else - tcp_update_check_tcp4(iph, th); + tcp_update_check_tcp4(iph, bp); tap_hdr_update(taph, l3len + sizeof(struct ethhdr)); @@ -948,7 +950,7 @@ static size_t tcp_fill_headers4(const struct tcp_tap_conn *conn, * @conn: Connection pointer * @taph: tap backend specific header * @ip6h: Pointer to IPv6 header - * @th: Pointer to TCP header + * @bp: Pointer to TCP header followed by TCP payload * @dlen: TCP payload length * @check: Checksum, if already known * @seq: Sequence number for this segment @@ -958,11 +960,11 @@ static size_t tcp_fill_headers4(const struct tcp_tap_conn *conn, */ static size_t tcp_fill_headers6(const struct tcp_tap_conn *conn, struct tap_hdr *taph, - struct ipv6hdr *ip6h, struct tcphdr *th, + struct ipv6hdr *ip6h, struct tcp_payload_t *bp, size_t dlen, uint32_t seq, bool no_tcp_csum) { const struct flowside *tapside = TAPFLOW(conn); - size_t l4len = dlen + sizeof(*th); + size_t l4len = dlen + sizeof(bp->th); ip6h->payload_len = htons(l4len); ip6h->saddr = tapside->oaddr.a6; @@ -976,12 +978,12 @@ static size_t tcp_fill_headers6(const struct tcp_tap_conn *conn, ip6h->flow_lbl[1] = (conn->sock >> 8) & 0xff; ip6h->flow_lbl[2] = (conn->sock >> 0) & 0xff; - tcp_fill_header(th, conn, seq); + tcp_fill_header(&bp->th, conn, seq); if (no_tcp_csum) - th->check = 0; + bp->th.check = 0; else - tcp_update_check_tcp6(ip6h, th); + tcp_update_check_tcp6(ip6h, bp); tap_hdr_update(taph, l4len + sizeof(*ip6h) + sizeof(struct ethhdr)); |