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tcp: Allow checksum to be disabled

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We can need not to set TCP checksum. Add a parameter to
tcp_fill_headers4() and tcp_fill_headers6() to disable it.

Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
Laurent Vivier 2024-09-18 15:13:28 +02:00 • committed by Stefano Brivio
parent 4fe5f4e813
commit 8f8c4d27eb
3 changed files with 38 additions and 25 deletions

8
tcp_buf.c
View file

@ -320,7 +320,7 @@ int tcp_buf_send_flag(const struct ctx *c, struct tcp_tap_conn *conn, int flags)
return ret;
}
l4len = tcp_l2_buf_fill_headers(conn, iov, optlen, NULL, seq);
l4len = tcp_l2_buf_fill_headers(conn, iov, optlen, NULL, seq, false);
iov[TCP_IOV_PAYLOAD].iov_len = l4len;
if (flags & DUP_ACK) {
@ -381,7 +381,8 @@ static void tcp_data_to_tap(const struct ctx *c, struct tcp_tap_conn *conn,
tcp4_frame_conns[tcp4_payload_used] = conn;
iov = tcp4_l2_iov[tcp4_payload_used++];
l4len = tcp_l2_buf_fill_headers(conn, iov, dlen, check, seq);
l4len = tcp_l2_buf_fill_headers(conn, iov, dlen, check, seq,
false);
iov[TCP_IOV_PAYLOAD].iov_len = l4len;
if (tcp4_payload_used > TCP_FRAMES_MEM - 1)
tcp_payload_flush(c);
@ -389,7 +390,8 @@ static void tcp_data_to_tap(const struct ctx *c, struct tcp_tap_conn *conn,
tcp6_frame_conns[tcp6_payload_used] = conn;
iov = tcp6_l2_iov[tcp6_payload_used++];
l4len = tcp_l2_buf_fill_headers(conn, iov, dlen, NULL, seq);
l4len = tcp_l2_buf_fill_headers(conn, iov, dlen, NULL, seq,
false);
iov[TCP_IOV_PAYLOAD].iov_len = l4len;
if (tcp6_payload_used > TCP_FRAMES_MEM - 1)
tcp_payload_flush(c);