With vhost-user we can disable the checksum of UDP and TCP. Add a generic parameter for each of them to disable the checksum. Laurent Vivier (2): udp: Allow checksum to be disabled tcp: Allow checksum to be disabled tcp.c | 24 +++++++++++++++++------- tcp_buf.c | 8 +++++--- tcp_internal.h | 3 ++- udp.c | 41 +++++++++++++++++++++++++++++++---------- 4 files changed, 55 insertions(+), 21 deletions(-) -- 2.46.0
We can need not to set the UDP checksum. Add a parameter to
udp_update_hdr4() and udp_update_hdr6() to disable it.
Signed-off-by: Laurent Vivier <lvivier(a)redhat.com>
---
udp.c | 41 +++++++++++++++++++++++++++++++----------
1 file changed, 31 insertions(+), 10 deletions(-)
diff --git a/udp.c b/udp.c
index 2ba00c9c20a8..64a0d9f9dba2 100644
--- a/udp.c
+++ b/udp.c
@@ -298,11 +298,13 @@ static void udp_splice_send(const struct ctx *c, size_t start,
size_t n,
* @bp: Pointer to udp_payload_t to update
* @toside: Flowside for destination side
* @dlen: Length of UDP payload
+ * @no_udp_csum: Do not set UPD checksum
*
* Return: size of IPv4 payload (UDP header + data)
*/
static size_t udp_update_hdr4(struct iphdr *ip4h, struct udp_payload_t *bp,
- const struct flowside *toside, size_t dlen)
+ const struct flowside *toside, size_t dlen,
+ bool no_udp_csum)
{
const struct in_addr *src = inany_v4(&toside->oaddr);
const struct in_addr *dst = inany_v4(&toside->eaddr);
@@ -319,7 +321,10 @@ static size_t udp_update_hdr4(struct iphdr *ip4h, struct
udp_payload_t *bp,
bp->uh.source = htons(toside->oport);
bp->uh.dest = htons(toside->eport);
bp->uh.len = htons(l4len);
- csum_udp4(&bp->uh, *src, *dst, bp->data, dlen);
+ if (no_udp_csum)
+ bp->uh.check = 0;
+ else
+ csum_udp4(&bp->uh, *src, *dst, bp->data, dlen);
return l4len;
}
@@ -330,11 +335,13 @@ static size_t udp_update_hdr4(struct iphdr *ip4h, struct
udp_payload_t *bp,
* @bp: Pointer to udp_payload_t to update
* @toside: Flowside for destination side
* @dlen: Length of UDP payload
+ * @no_udp_csum: Do not set UPD checksum
*
* Return: size of IPv6 payload (UDP header + data)
*/
static size_t udp_update_hdr6(struct ipv6hdr *ip6h, struct udp_payload_t *bp,
- const struct flowside *toside, size_t dlen)
+ const struct flowside *toside, size_t dlen,
+ bool no_udp_csum)
{
uint16_t l4len = dlen + sizeof(bp->uh);
@@ -348,7 +355,16 @@ static size_t udp_update_hdr6(struct ipv6hdr *ip6h, struct
udp_payload_t *bp,
bp->uh.source = htons(toside->oport);
bp->uh.dest = htons(toside->eport);
bp->uh.len = ip6h->payload_len;
- csum_udp6(&bp->uh, &toside->oaddr.a6, &toside->eaddr.a6,
bp->data, dlen);
+ if (no_udp_csum) {
+ /* O is an invalid checksum for UDP IPv6 and dropped by
+ * the kernel stack, even if the checksum is disabled by virtio
+ * flags. We need to put any non-zero value here.
+ */
+ bp->uh.check = 0xffff;
+ } else {
+ csum_udp6(&bp->uh, &toside->oaddr.a6, &toside->eaddr.a6,
+ bp->data, dlen);
+ }
return l4len;
}
@@ -358,9 +374,11 @@ static size_t udp_update_hdr6(struct ipv6hdr *ip6h, struct
udp_payload_t *bp,
* @mmh: Receiving mmsghdr array
* @idx: Index of the datagram to prepare
* @toside: Flowside for destination side
+ * @no_udp_csum: Do not set UPD checksum
*/
-static void udp_tap_prepare(const struct mmsghdr *mmh, unsigned idx,
- const struct flowside *toside)
+static void udp_tap_prepare(const struct mmsghdr *mmh,
+ unsigned idx, const struct flowside *toside,
+ bool no_udp_csum)
{
struct iovec (*tap_iov)[UDP_NUM_IOVS] = &udp_l2_iov[idx];
struct udp_payload_t *bp = &udp_payload[idx];
@@ -368,13 +386,15 @@ static void udp_tap_prepare(const struct mmsghdr *mmh, unsigned
idx,
size_t l4len;
if (!inany_v4(&toside->eaddr) || !inany_v4(&toside->oaddr)) {
- l4len = udp_update_hdr6(&bm->ip6h, bp, toside, mmh[idx].msg_len);
+ l4len = udp_update_hdr6(&bm->ip6h, bp, toside,
+ mmh[idx].msg_len, no_udp_csum);
tap_hdr_update(&bm->taph, l4len + sizeof(bm->ip6h) +
sizeof(udp6_eth_hdr));
(*tap_iov)[UDP_IOV_ETH] = IOV_OF_LVALUE(udp6_eth_hdr);
(*tap_iov)[UDP_IOV_IP] = IOV_OF_LVALUE(bm->ip6h);
} else {
- l4len = udp_update_hdr4(&bm->ip4h, bp, toside, mmh[idx].msg_len);
+ l4len = udp_update_hdr4(&bm->ip4h, bp, toside,
+ mmh[idx].msg_len, no_udp_csum);
tap_hdr_update(&bm->taph, l4len + sizeof(bm->ip4h) +
sizeof(udp4_eth_hdr));
(*tap_iov)[UDP_IOV_ETH] = IOV_OF_LVALUE(udp4_eth_hdr);
@@ -565,7 +585,8 @@ void udp_listen_sock_handler(const struct ctx *c, union epoll_ref
ref,
udp_splice_prepare(udp_mh_recv, i);
} else if (batchpif == PIF_TAP) {
udp_tap_prepare(udp_mh_recv, i,
- flowside_at_sidx(batchsidx));
+ flowside_at_sidx(batchsidx),
+ false);
}
if (++i >= n)
@@ -636,7 +657,7 @@ void udp_reply_sock_handler(const struct ctx *c, union epoll_ref ref,
if (pif_is_socket(topif))
udp_splice_prepare(udp_mh_recv, i);
else if (topif == PIF_TAP)
- udp_tap_prepare(udp_mh_recv, i, toside);
+ udp_tap_prepare(udp_mh_recv, i, toside, false);
/* Restore sockaddr length clobbered by recvmsg() */
udp_mh_recv[i].msg_hdr.msg_namelen = sizeof(udp_meta[i].s_in);
}
--
2.46.0
On Mon, Sep 16, 2024 at 02:16:00PM +0200, Laurent Vivier wrote:We can need not to set the UDP checksum. Add a parameter to udp_update_hdr4() and udp_update_hdr6() to disable it. Signed-off-by: Laurent Vivier <lvivier(a)redhat.com> --- udp.c | 41 +++++++++++++++++++++++++++++++---------- 1 file changed, 31 insertions(+), 10 deletions(-) diff --git a/udp.c b/udp.c index 2ba00c9c20a8..64a0d9f9dba2 100644 --- a/udp.c +++ b/udp.c @@ -298,11 +298,13 @@ static void udp_splice_send(const struct ctx *c, size_t start, size_t n, * @bp: Pointer to udp_payload_t to update * @toside: Flowside for destination side * @dlen: Length of UDP payload + * @no_udp_csum: Do not set UPD checksums/UPD/UDP/g :) Otherwise LGTM.* * Return: size of IPv4 payload (UDP header + data) */ static size_t udp_update_hdr4(struct iphdr *ip4h, struct udp_payload_t *bp, - const struct flowside *toside, size_t dlen) + const struct flowside *toside, size_t dlen, + bool no_udp_csum) { const struct in_addr *src = inany_v4(&toside->oaddr); const struct in_addr *dst = inany_v4(&toside->eaddr); @@ -319,7 +321,10 @@ static size_t udp_update_hdr4(struct iphdr *ip4h, struct udp_payload_t *bp, bp->uh.source = htons(toside->oport); bp->uh.dest = htons(toside->eport); bp->uh.len = htons(l4len); - csum_udp4(&bp->uh, *src, *dst, bp->data, dlen); + if (no_udp_csum) + bp->uh.check = 0; + else + csum_udp4(&bp->uh, *src, *dst, bp->data, dlen); return l4len; } @@ -330,11 +335,13 @@ static size_t udp_update_hdr4(struct iphdr *ip4h, struct udp_payload_t *bp, * @bp: Pointer to udp_payload_t to update * @toside: Flowside for destination side * @dlen: Length of UDP payload + * @no_udp_csum: Do not set UPD checksum * * Return: size of IPv6 payload (UDP header + data) */ static size_t udp_update_hdr6(struct ipv6hdr *ip6h, struct udp_payload_t *bp, - const struct flowside *toside, size_t dlen) + const struct flowside *toside, size_t dlen, + bool no_udp_csum) { uint16_t l4len = dlen + sizeof(bp->uh); @@ -348,7 +355,16 @@ static size_t udp_update_hdr6(struct ipv6hdr *ip6h, struct udp_payload_t *bp, bp->uh.source = htons(toside->oport); bp->uh.dest = htons(toside->eport); bp->uh.len = ip6h->payload_len; - csum_udp6(&bp->uh, &toside->oaddr.a6, &toside->eaddr.a6, bp->data, dlen); + if (no_udp_csum) { + /* O is an invalid checksum for UDP IPv6 and dropped by + * the kernel stack, even if the checksum is disabled by virtio + * flags. We need to put any non-zero value here. + */ + bp->uh.check = 0xffff; + } else { + csum_udp6(&bp->uh, &toside->oaddr.a6, &toside->eaddr.a6, + bp->data, dlen); + } return l4len; } @@ -358,9 +374,11 @@ static size_t udp_update_hdr6(struct ipv6hdr *ip6h, struct udp_payload_t *bp, * @mmh: Receiving mmsghdr array * @idx: Index of the datagram to prepare * @toside: Flowside for destination side + * @no_udp_csum: Do not set UPD checksum */ -static void udp_tap_prepare(const struct mmsghdr *mmh, unsigned idx, - const struct flowside *toside) +static void udp_tap_prepare(const struct mmsghdr *mmh, + unsigned idx, const struct flowside *toside, + bool no_udp_csum) { struct iovec (*tap_iov)[UDP_NUM_IOVS] = &udp_l2_iov[idx]; struct udp_payload_t *bp = &udp_payload[idx]; @@ -368,13 +386,15 @@ static void udp_tap_prepare(const struct mmsghdr *mmh, unsigned idx, size_t l4len; if (!inany_v4(&toside->eaddr) || !inany_v4(&toside->oaddr)) { - l4len = udp_update_hdr6(&bm->ip6h, bp, toside, mmh[idx].msg_len); + l4len = udp_update_hdr6(&bm->ip6h, bp, toside, + mmh[idx].msg_len, no_udp_csum); tap_hdr_update(&bm->taph, l4len + sizeof(bm->ip6h) + sizeof(udp6_eth_hdr)); (*tap_iov)[UDP_IOV_ETH] = IOV_OF_LVALUE(udp6_eth_hdr); (*tap_iov)[UDP_IOV_IP] = IOV_OF_LVALUE(bm->ip6h); } else { - l4len = udp_update_hdr4(&bm->ip4h, bp, toside, mmh[idx].msg_len); + l4len = udp_update_hdr4(&bm->ip4h, bp, toside, + mmh[idx].msg_len, no_udp_csum); tap_hdr_update(&bm->taph, l4len + sizeof(bm->ip4h) + sizeof(udp4_eth_hdr)); (*tap_iov)[UDP_IOV_ETH] = IOV_OF_LVALUE(udp4_eth_hdr); @@ -565,7 +585,8 @@ void udp_listen_sock_handler(const struct ctx *c, union epoll_ref ref, udp_splice_prepare(udp_mh_recv, i); } else if (batchpif == PIF_TAP) { udp_tap_prepare(udp_mh_recv, i, - flowside_at_sidx(batchsidx)); + flowside_at_sidx(batchsidx), + false); } if (++i >= n) @@ -636,7 +657,7 @@ void udp_reply_sock_handler(const struct ctx *c, union epoll_ref ref, if (pif_is_socket(topif)) udp_splice_prepare(udp_mh_recv, i); else if (topif == PIF_TAP) - udp_tap_prepare(udp_mh_recv, i, toside); + udp_tap_prepare(udp_mh_recv, i, toside, false); /* Restore sockaddr length clobbered by recvmsg() */ udp_mh_recv[i].msg_hdr.msg_namelen = sizeof(udp_meta[i].s_in); }-- David Gibson (he or they) | I'll have my music baroque, and my code david AT gibson.dropbear.id.au | minimalist, thank you, not the other way | around. http://www.ozlabs.org/~dgibson
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(a)redhat.com>
---
tcp.c | 24 +++++++++++++++++-------
tcp_buf.c | 8 +++++---
tcp_internal.h | 3 ++-
3 files changed, 24 insertions(+), 11 deletions(-)
diff --git a/tcp.c b/tcp.c
index f9fe1b9a1330..a44d7b977214 100644
--- a/tcp.c
+++ b/tcp.c
@@ -903,6 +903,7 @@ static void tcp_fill_header(struct tcphdr *th,
* @dlen: TCP payload length
* @check: Checksum, if already known
* @seq: Sequence number for this segment
+ * @no_tcp_csum: Do not set TCP checksum
*
* Return: The IPv4 payload length, host order
*/
@@ -910,7 +911,7 @@ static size_t tcp_fill_headers4(const struct tcp_tap_conn *conn,
struct tap_hdr *taph,
struct iphdr *iph, struct tcphdr *th,
size_t dlen, const uint16_t *check,
- uint32_t seq)
+ uint32_t seq, bool no_tcp_csum)
{
const struct flowside *tapside = TAPFLOW(conn);
const struct in_addr *src4 = inany_v4(&tapside->oaddr);
@@ -929,7 +930,10 @@ static size_t tcp_fill_headers4(const struct tcp_tap_conn *conn,
tcp_fill_header(th, conn, seq);
- tcp_update_check_tcp4(iph, th);
+ if (no_tcp_csum)
+ th->check = 0;
+ else
+ tcp_update_check_tcp4(iph, th);
tap_hdr_update(taph, l3len + sizeof(struct ethhdr));
@@ -945,13 +949,14 @@ static size_t tcp_fill_headers4(const struct tcp_tap_conn *conn,
* @dlen: TCP payload length
* @check: Checksum, if already known
* @seq: Sequence number for this segment
+ * @no_tcp_csum: Do not set TCP checksum
*
* Return: The IPv6 payload length, host order
*/
static size_t tcp_fill_headers6(const struct tcp_tap_conn *conn,
struct tap_hdr *taph,
struct ipv6hdr *ip6h, struct tcphdr *th,
- size_t dlen, uint32_t seq)
+ size_t dlen, uint32_t seq, bool no_tcp_csum)
{
const struct flowside *tapside = TAPFLOW(conn);
size_t l4len = dlen + sizeof(*th);
@@ -970,7 +975,10 @@ static size_t tcp_fill_headers6(const struct tcp_tap_conn *conn,
tcp_fill_header(th, conn, seq);
- tcp_update_check_tcp6(ip6h, th);
+ if (no_tcp_csum)
+ th->check = 0;
+ else
+ tcp_update_check_tcp6(ip6h, th);
tap_hdr_update(taph, l4len + sizeof(*ip6h) + sizeof(struct ethhdr));
@@ -984,12 +992,14 @@ static size_t tcp_fill_headers6(const struct tcp_tap_conn *conn,
* @dlen: TCP payload length
* @check: Checksum, if already known
* @seq: Sequence number for this segment
+ * @no_tcp_csum: Do not set TCP checksum
*
* Return: IP payload length, host order
*/
size_t tcp_l2_buf_fill_headers(const struct tcp_tap_conn *conn,
struct iovec *iov, size_t dlen,
- const uint16_t *check, uint32_t seq)
+ const uint16_t *check, uint32_t seq,
+ bool no_tcp_csum)
{
const struct flowside *tapside = TAPFLOW(conn);
const struct in_addr *a4 = inany_v4(&tapside->oaddr);
@@ -998,13 +1008,13 @@ size_t tcp_l2_buf_fill_headers(const struct tcp_tap_conn *conn,
return tcp_fill_headers4(conn, iov[TCP_IOV_TAP].iov_base,
iov[TCP_IOV_IP].iov_base,
iov[TCP_IOV_PAYLOAD].iov_base, dlen,
- check, seq);
+ check, seq, no_tcp_csum);
}
return tcp_fill_headers6(conn, iov[TCP_IOV_TAP].iov_base,
iov[TCP_IOV_IP].iov_base,
iov[TCP_IOV_PAYLOAD].iov_base, dlen,
- seq);
+ seq, no_tcp_csum);
}
/**
diff --git a/tcp_buf.c b/tcp_buf.c
index 1a398461a34b..10a663bdfc26 100644
--- a/tcp_buf.c
+++ b/tcp_buf.c
@@ -320,7 +320,7 @@ int tcp_buf_send_flag(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(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(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);
diff --git a/tcp_internal.h b/tcp_internal.h
index aa8bb64f1f33..e7fe735bfcb4 100644
--- a/tcp_internal.h
+++ b/tcp_internal.h
@@ -91,7 +91,8 @@ void tcp_rst_do(struct ctx *c, struct tcp_tap_conn *conn);
size_t tcp_l2_buf_fill_headers(const struct tcp_tap_conn *conn,
struct iovec *iov, size_t dlen,
- const uint16_t *check, uint32_t seq);
+ const uint16_t *check, uint32_t seq,
+ bool no_tcp_csum);
int tcp_update_seqack_wnd(const struct ctx *c, struct tcp_tap_conn *conn,
int force_seq, struct tcp_info *tinfo);
int tcp_prepare_flags(struct ctx *c, struct tcp_tap_conn *conn, int flags,
--
2.46.0
On Mon, Sep 16, 2024 at 02:16:01PM +0200, Laurent Vivier wrote: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(a)redhat.com>Reviewed-by: David Gibson <david(a)gibson.dropbear.id.au>--- tcp.c | 24 +++++++++++++++++------- tcp_buf.c | 8 +++++--- tcp_internal.h | 3 ++- 3 files changed, 24 insertions(+), 11 deletions(-) diff --git a/tcp.c b/tcp.c index f9fe1b9a1330..a44d7b977214 100644 --- a/tcp.c +++ b/tcp.c @@ -903,6 +903,7 @@ static void tcp_fill_header(struct tcphdr *th, * @dlen: TCP payload length * @check: Checksum, if already known * @seq: Sequence number for this segment + * @no_tcp_csum: Do not set TCP checksum * * Return: The IPv4 payload length, host order */ @@ -910,7 +911,7 @@ static size_t tcp_fill_headers4(const struct tcp_tap_conn *conn, struct tap_hdr *taph, struct iphdr *iph, struct tcphdr *th, size_t dlen, const uint16_t *check, - uint32_t seq) + uint32_t seq, bool no_tcp_csum) { const struct flowside *tapside = TAPFLOW(conn); const struct in_addr *src4 = inany_v4(&tapside->oaddr); @@ -929,7 +930,10 @@ static size_t tcp_fill_headers4(const struct tcp_tap_conn *conn, tcp_fill_header(th, conn, seq); - tcp_update_check_tcp4(iph, th); + if (no_tcp_csum) + th->check = 0; + else + tcp_update_check_tcp4(iph, th); tap_hdr_update(taph, l3len + sizeof(struct ethhdr)); @@ -945,13 +949,14 @@ static size_t tcp_fill_headers4(const struct tcp_tap_conn *conn, * @dlen: TCP payload length * @check: Checksum, if already known * @seq: Sequence number for this segment + * @no_tcp_csum: Do not set TCP checksum * * Return: The IPv6 payload length, host order */ static size_t tcp_fill_headers6(const struct tcp_tap_conn *conn, struct tap_hdr *taph, struct ipv6hdr *ip6h, struct tcphdr *th, - size_t dlen, uint32_t seq) + size_t dlen, uint32_t seq, bool no_tcp_csum) { const struct flowside *tapside = TAPFLOW(conn); size_t l4len = dlen + sizeof(*th); @@ -970,7 +975,10 @@ static size_t tcp_fill_headers6(const struct tcp_tap_conn *conn, tcp_fill_header(th, conn, seq); - tcp_update_check_tcp6(ip6h, th); + if (no_tcp_csum) + th->check = 0; + else + tcp_update_check_tcp6(ip6h, th); tap_hdr_update(taph, l4len + sizeof(*ip6h) + sizeof(struct ethhdr)); @@ -984,12 +992,14 @@ static size_t tcp_fill_headers6(const struct tcp_tap_conn *conn, * @dlen: TCP payload length * @check: Checksum, if already known * @seq: Sequence number for this segment + * @no_tcp_csum: Do not set TCP checksum * * Return: IP payload length, host order */ size_t tcp_l2_buf_fill_headers(const struct tcp_tap_conn *conn, struct iovec *iov, size_t dlen, - const uint16_t *check, uint32_t seq) + const uint16_t *check, uint32_t seq, + bool no_tcp_csum) { const struct flowside *tapside = TAPFLOW(conn); const struct in_addr *a4 = inany_v4(&tapside->oaddr); @@ -998,13 +1008,13 @@ size_t tcp_l2_buf_fill_headers(const struct tcp_tap_conn *conn, return tcp_fill_headers4(conn, iov[TCP_IOV_TAP].iov_base, iov[TCP_IOV_IP].iov_base, iov[TCP_IOV_PAYLOAD].iov_base, dlen, - check, seq); + check, seq, no_tcp_csum); } return tcp_fill_headers6(conn, iov[TCP_IOV_TAP].iov_base, iov[TCP_IOV_IP].iov_base, iov[TCP_IOV_PAYLOAD].iov_base, dlen, - seq); + seq, no_tcp_csum); } /** diff --git a/tcp_buf.c b/tcp_buf.c index 1a398461a34b..10a663bdfc26 100644 --- a/tcp_buf.c +++ b/tcp_buf.c @@ -320,7 +320,7 @@ int tcp_buf_send_flag(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(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(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); diff --git a/tcp_internal.h b/tcp_internal.h index aa8bb64f1f33..e7fe735bfcb4 100644 --- a/tcp_internal.h +++ b/tcp_internal.h @@ -91,7 +91,8 @@ void tcp_rst_do(struct ctx *c, struct tcp_tap_conn *conn); size_t tcp_l2_buf_fill_headers(const struct tcp_tap_conn *conn, struct iovec *iov, size_t dlen, - const uint16_t *check, uint32_t seq); + const uint16_t *check, uint32_t seq, + bool no_tcp_csum); int tcp_update_seqack_wnd(const struct ctx *c, struct tcp_tap_conn *conn, int force_seq, struct tcp_info *tinfo); int tcp_prepare_flags(struct ctx *c, struct tcp_tap_conn *conn, int flags,-- David Gibson (he or they) | I'll have my music baroque, and my code david AT gibson.dropbear.id.au | minimalist, thank you, not the other way | around. http://www.ozlabs.org/~dgibson