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-rw-r--r--tcp.c6
-rw-r--r--tcp_buf.c246
-rw-r--r--tcp_buf.h3
3 files changed, 75 insertions, 180 deletions
diff --git a/tcp.c b/tcp.c
index 0569dc6..10ad06a 100644
--- a/tcp.c
+++ b/tcp.c
@@ -2611,11 +2611,7 @@ int tcp_init(struct ctx *c)
{
ASSERT(!c->no_tcp);
- if (c->ifi4)
- tcp_sock4_iov_init(c);
-
- if (c->ifi6)
- tcp_sock6_iov_init(c);
+ tcp_sock_iov_init(c);
memset(init_sock_pool4, 0xff, sizeof(init_sock_pool4));
memset(init_sock_pool6, 0xff, sizeof(init_sock_pool6));
diff --git a/tcp_buf.c b/tcp_buf.c
index e249c6b..274e313 100644
--- a/tcp_buf.c
+++ b/tcp_buf.c
@@ -38,59 +38,44 @@
(c->mode == MODE_PASTA ? 1 : TCP_FRAMES_MEM)
/* Static buffers */
-/* Ethernet header for IPv4 frames */
+
+/* Ethernet header for IPv4 and IPv6 frames */
static struct ethhdr tcp4_eth_src;
+static struct ethhdr tcp6_eth_src;
+
+static struct tap_hdr tcp_payload_tap_hdr[TCP_FRAMES_MEM];
+
+/* IP headers for IPv4 and IPv6 */
+struct iphdr tcp4_payload_ip[TCP_FRAMES_MEM];
+struct ipv6hdr tcp6_payload_ip[TCP_FRAMES_MEM];
-static struct tap_hdr tcp4_payload_tap_hdr[TCP_FRAMES_MEM];
-/* IPv4 headers */
-static struct iphdr tcp4_payload_ip[TCP_FRAMES_MEM];
-/* TCP segments with payload for IPv4 frames */
-static struct tcp_payload_t tcp4_payload[TCP_FRAMES_MEM];
+/* TCP segments with payload for IPv4 and IPv6 frames */
+static struct tcp_payload_t tcp_payload[TCP_FRAMES_MEM];
-static_assert(MSS4 <= sizeof(tcp4_payload[0].data), "MSS4 is greater than 65516");
+static_assert(MSS4 <= sizeof(tcp_payload[0].data), "MSS4 is greater than 65516");
+static_assert(MSS6 <= sizeof(tcp_payload[0].data), "MSS6 is greater than 65516");
/* References tracking the owner connection of frames in the tap outqueue */
-static struct tcp_tap_conn *tcp4_frame_conns[TCP_FRAMES_MEM];
-static unsigned int tcp4_payload_used;
+static struct tcp_tap_conn *tcp_frame_conns[TCP_FRAMES_MEM];
+static unsigned int tcp_payload_used;
-static struct tap_hdr tcp4_flags_tap_hdr[TCP_FRAMES_MEM];
+static struct tap_hdr tcp_flags_tap_hdr[TCP_FRAMES_MEM];
/* IPv4 headers for TCP segment without payload */
static struct iphdr tcp4_flags_ip[TCP_FRAMES_MEM];
/* TCP segments without payload for IPv4 frames */
-static struct tcp_flags_t tcp4_flags[TCP_FRAMES_MEM];
-
-static unsigned int tcp4_flags_used;
-
-/* Ethernet header for IPv6 frames */
-static struct ethhdr tcp6_eth_src;
-
-static struct tap_hdr tcp6_payload_tap_hdr[TCP_FRAMES_MEM];
-/* IPv6 headers */
-static struct ipv6hdr tcp6_payload_ip[TCP_FRAMES_MEM];
-/* TCP headers and data for IPv6 frames */
-static struct tcp_payload_t tcp6_payload[TCP_FRAMES_MEM];
+static struct tcp_flags_t tcp_flags[TCP_FRAMES_MEM];
-static_assert(MSS6 <= sizeof(tcp6_payload[0].data), "MSS6 is greater than 65516");
+static unsigned int tcp_flags_used;
-/* References tracking the owner connection of frames in the tap outqueue */
-static struct tcp_tap_conn *tcp6_frame_conns[TCP_FRAMES_MEM];
-static unsigned int tcp6_payload_used;
-
-static struct tap_hdr tcp6_flags_tap_hdr[TCP_FRAMES_MEM];
/* IPv6 headers for TCP segment without payload */
static struct ipv6hdr tcp6_flags_ip[TCP_FRAMES_MEM];
-/* TCP segment without payload for IPv6 frames */
-static struct tcp_flags_t tcp6_flags[TCP_FRAMES_MEM];
-
-static unsigned int tcp6_flags_used;
/* recvmsg()/sendmsg() data for tap */
static struct iovec iov_sock [TCP_FRAMES_MEM + 1];
-static struct iovec tcp4_l2_iov [TCP_FRAMES_MEM][TCP_NUM_IOVS];
-static struct iovec tcp6_l2_iov [TCP_FRAMES_MEM][TCP_NUM_IOVS];
-static struct iovec tcp4_l2_flags_iov [TCP_FRAMES_MEM][TCP_NUM_IOVS];
-static struct iovec tcp6_l2_flags_iov [TCP_FRAMES_MEM][TCP_NUM_IOVS];
+static struct iovec tcp_l2_iov[TCP_FRAMES_MEM][TCP_NUM_IOVS];
+static struct iovec tcp_l2_flags_iov[TCP_FRAMES_MEM][TCP_NUM_IOVS];
+
/**
* tcp_update_l2_buf() - Update Ethernet header buffers with addresses
* @eth_d: Ethernet destination address, NULL if unchanged
@@ -103,86 +88,46 @@ void tcp_update_l2_buf(const unsigned char *eth_d, const unsigned char *eth_s)
}
/**
- * tcp_sock4_iov_init() - Initialise scatter-gather L2 buffers for IPv4 sockets
+ * tcp_sock_iov_init() - Initialise scatter-gather L2 buffers for IPv4 sockets
* @c: Execution context
*/
-void tcp_sock4_iov_init(const struct ctx *c)
+void tcp_sock_iov_init(const struct ctx *c)
{
+ struct ipv6hdr ip6 = L2_BUF_IP6_INIT(IPPROTO_TCP);
struct iphdr iph = L2_BUF_IP4_INIT(IPPROTO_TCP);
- struct iovec *iov;
int i;
+ tcp6_eth_src.h_proto = htons_constant(ETH_P_IPV6);
tcp4_eth_src.h_proto = htons_constant(ETH_P_IP);
- for (i = 0; i < ARRAY_SIZE(tcp4_payload); i++) {
+ for (i = 0; i < ARRAY_SIZE(tcp_payload); i++) {
+ tcp6_payload_ip[i] = ip6;
tcp4_payload_ip[i] = iph;
- tcp4_payload[i].th.doff = sizeof(struct tcphdr) / 4;
- tcp4_payload[i].th.ack = 1;
+ tcp_payload[i].th.doff = sizeof(struct tcphdr) / 4;
+ tcp_payload[i].th.ack = 1;
}
- for (i = 0; i < ARRAY_SIZE(tcp4_flags); i++) {
+ for (i = 0; i < ARRAY_SIZE(tcp_flags); i++) {
+ tcp6_flags_ip[i] = ip6;
tcp4_flags_ip[i] = iph;
- tcp4_flags[i].th.doff = sizeof(struct tcphdr) / 4;
- tcp4_flags[i].th.ack = 1;
+ tcp_flags[i].th.doff = sizeof(struct tcphdr) / 4;
+ tcp_flags[i].th.ack = 1;
}
for (i = 0; i < TCP_FRAMES_MEM; i++) {
- iov = tcp4_l2_iov[i];
+ struct iovec *iov = tcp_l2_iov[i];
- iov[TCP_IOV_TAP] = tap_hdr_iov(c, &tcp4_payload_tap_hdr[i]);
+ iov[TCP_IOV_TAP] = tap_hdr_iov(c, &tcp_payload_tap_hdr[i]);
iov[TCP_IOV_ETH].iov_len = sizeof(struct ethhdr);
- iov[TCP_IOV_PAYLOAD].iov_base = &tcp4_payload[i];
- }
-
- for (i = 0; i < TCP_FRAMES_MEM; i++) {
- iov = tcp4_l2_flags_iov[i];
-
- iov[TCP_IOV_TAP] = tap_hdr_iov(c, &tcp4_flags_tap_hdr[i]);
- iov[TCP_IOV_ETH] = IOV_OF_LVALUE(tcp4_eth_src);
- iov[TCP_IOV_IP] = IOV_OF_LVALUE(tcp4_flags_ip[i]);
- iov[TCP_IOV_PAYLOAD].iov_base = &tcp4_flags[i];
- }
-}
-
-/**
- * tcp_sock6_iov_init() - Initialise scatter-gather L2 buffers for IPv6 sockets
- * @c: Execution context
- */
-void tcp_sock6_iov_init(const struct ctx *c)
-{
- struct ipv6hdr ip6 = L2_BUF_IP6_INIT(IPPROTO_TCP);
- struct iovec *iov;
- int i;
-
- tcp6_eth_src.h_proto = htons_constant(ETH_P_IPV6);
-
- for (i = 0; i < ARRAY_SIZE(tcp6_payload); i++) {
- tcp6_payload_ip[i] = ip6;
- tcp6_payload[i].th.doff = sizeof(struct tcphdr) / 4;
- tcp6_payload[i].th.ack = 1;
- }
-
- for (i = 0; i < ARRAY_SIZE(tcp6_flags); i++) {
- tcp6_flags_ip[i] = ip6;
- tcp6_flags[i].th.doff = sizeof(struct tcphdr) / 4;
- tcp6_flags[i].th .ack = 1;
+ iov[TCP_IOV_PAYLOAD].iov_base = &tcp_payload[i];
}
for (i = 0; i < TCP_FRAMES_MEM; i++) {
- iov = tcp6_l2_iov[i];
+ struct iovec *iov = tcp_l2_flags_iov[i];
- iov[TCP_IOV_TAP] = tap_hdr_iov(c, &tcp6_payload_tap_hdr[i]);
+ iov[TCP_IOV_TAP] = tap_hdr_iov(c, &tcp_flags_tap_hdr[i]);
iov[TCP_IOV_ETH].iov_len = sizeof(struct ethhdr);
- iov[TCP_IOV_PAYLOAD].iov_base = &tcp6_payload[i];
- }
-
- for (i = 0; i < TCP_FRAMES_MEM; i++) {
- iov = tcp6_l2_flags_iov[i];
-
- iov[TCP_IOV_TAP] = tap_hdr_iov(c, &tcp6_flags_tap_hdr[i]);
- iov[TCP_IOV_ETH] = IOV_OF_LVALUE(tcp6_eth_src);
- iov[TCP_IOV_IP] = IOV_OF_LVALUE(tcp6_flags_ip[i]);
- iov[TCP_IOV_PAYLOAD].iov_base = &tcp6_flags[i];
+ iov[TCP_IOV_PAYLOAD].iov_base = &tcp_flags[i];
}
}
@@ -192,13 +137,9 @@ void tcp_sock6_iov_init(const struct ctx *c)
*/
void tcp_flags_flush(const struct ctx *c)
{
- tap_send_frames(c, &tcp6_l2_flags_iov[0][0], TCP_NUM_IOVS,
- tcp6_flags_used);
- tcp6_flags_used = 0;
-
- tap_send_frames(c, &tcp4_l2_flags_iov[0][0], TCP_NUM_IOVS,
- tcp4_flags_used);
- tcp4_flags_used = 0;
+ tap_send_frames(c, &tcp_l2_flags_iov[0][0], TCP_NUM_IOVS,
+ tcp_flags_used);
+ tcp_flags_used = 0;
}
/**
@@ -237,21 +178,13 @@ void tcp_payload_flush(const struct ctx *c)
{
size_t m;
- m = tap_send_frames(c, &tcp6_l2_iov[0][0], TCP_NUM_IOVS,
- tcp6_payload_used);
- if (m != tcp6_payload_used) {
- tcp_revert_seq(c, &tcp6_frame_conns[m], &tcp6_l2_iov[m],
- tcp6_payload_used - m);
+ m = tap_send_frames(c, &tcp_l2_iov[0][0], TCP_NUM_IOVS,
+ tcp_payload_used);
+ if (m != tcp_payload_used) {
+ tcp_revert_seq(c, &tcp_frame_conns[m], &tcp_l2_iov[m],
+ tcp_payload_used - m);
}
- tcp6_payload_used = 0;
-
- m = tap_send_frames(c, &tcp4_l2_iov[0][0], TCP_NUM_IOVS,
- tcp4_payload_used);
- if (m != tcp4_payload_used) {
- tcp_revert_seq(c, &tcp4_frame_conns[m], &tcp4_l2_iov[m],
- tcp4_payload_used - m);
- }
- tcp4_payload_used = 0;
+ tcp_payload_used = 0;
}
/**
@@ -271,41 +204,30 @@ int tcp_buf_send_flag(const struct ctx *c, struct tcp_tap_conn *conn, int flags)
uint32_t seq;
int ret;
+ iov = tcp_l2_flags_iov[tcp_flags_used];
if (CONN_V4(conn)) {
- iov = tcp4_l2_flags_iov[tcp4_flags_used];
- iov[TCP_IOV_IP] = IOV_OF_LVALUE(tcp4_flags_ip[tcp4_flags_used]);
+ iov[TCP_IOV_IP] = IOV_OF_LVALUE(tcp4_flags_ip[tcp_flags_used]);
iov[TCP_IOV_ETH].iov_base = &tcp4_eth_src;
- tcp4_flags_used++;
} else {
- iov = tcp6_l2_flags_iov[tcp6_flags_used];
- iov[TCP_IOV_IP] = IOV_OF_LVALUE(tcp6_flags_ip[tcp6_flags_used]);
+ iov[TCP_IOV_IP] = IOV_OF_LVALUE(tcp6_flags_ip[tcp_flags_used]);
iov[TCP_IOV_ETH].iov_base = &tcp6_eth_src;
- tcp6_flags_used++;
}
- payload = iov[TCP_IOV_PAYLOAD].iov_base;
+ payload = iov[TCP_IOV_PAYLOAD].iov_base;
seq = conn->seq_to_tap;
ret = tcp_prepare_flags(c, conn, flags, &payload->th,
&payload->opts, &optlen);
- if (ret <= 0) {
- if (CONN_V4(conn))
- tcp4_flags_used--;
- else
- tcp6_flags_used--;
+ if (ret <= 0)
return ret;
- }
+ tcp_flags_used++;
l4len = tcp_l2_buf_fill_headers(conn, iov, optlen, NULL, seq, false);
iov[TCP_IOV_PAYLOAD].iov_len = l4len;
if (flags & DUP_ACK) {
struct iovec *dup_iov;
- if (CONN_V4(conn))
- dup_iov = tcp4_l2_flags_iov[tcp4_flags_used++];
- else
- dup_iov = tcp6_l2_flags_iov[tcp6_flags_used++];
-
+ dup_iov = tcp_l2_flags_iov[tcp_flags_used++];
memcpy(dup_iov[TCP_IOV_TAP].iov_base, iov[TCP_IOV_TAP].iov_base,
iov[TCP_IOV_TAP].iov_len);
dup_iov[TCP_IOV_ETH].iov_base = iov[TCP_IOV_ETH].iov_base;
@@ -315,13 +237,8 @@ int tcp_buf_send_flag(const struct ctx *c, struct tcp_tap_conn *conn, int flags)
dup_iov[TCP_IOV_PAYLOAD].iov_len = l4len;
}
- if (CONN_V4(conn)) {
- if (tcp4_flags_used > TCP_FRAMES_MEM - 2)
- tcp_flags_flush(c);
- } else {
- if (tcp6_flags_used > TCP_FRAMES_MEM - 2)
- tcp_flags_flush(c);
- }
+ if (tcp_flags_used > TCP_FRAMES_MEM - 2)
+ tcp_flags_flush(c);
return 0;
}
@@ -337,42 +254,30 @@ int tcp_buf_send_flag(const struct ctx *c, struct tcp_tap_conn *conn, int flags)
static void tcp_data_to_tap(const struct ctx *c, struct tcp_tap_conn *conn,
ssize_t dlen, int no_csum, uint32_t seq)
{
+ const uint16_t *check = NULL;
struct iovec *iov;
size_t l4len;
conn->seq_to_tap = seq + dlen;
-
+ tcp_frame_conns[tcp_payload_used] = conn;
+ iov = tcp_l2_iov[tcp_payload_used];
if (CONN_V4(conn)) {
- struct iovec *iov_prev = tcp4_l2_iov[tcp4_payload_used - 1];
- const uint16_t *check = NULL;
-
if (no_csum) {
+ struct iovec *iov_prev = tcp_l2_iov[tcp_payload_used - 1];
struct iphdr *iph = iov_prev[TCP_IOV_IP].iov_base;
+
check = &iph->check;
}
-
- tcp4_frame_conns[tcp4_payload_used] = conn;
- iov = tcp4_l2_iov[tcp4_payload_used];
- iov[TCP_IOV_IP] =
- IOV_OF_LVALUE(tcp4_payload_ip[tcp4_payload_used++]);
+ iov[TCP_IOV_IP] = IOV_OF_LVALUE(tcp4_payload_ip[tcp_payload_used]);
iov[TCP_IOV_ETH].iov_base = &tcp4_eth_src;
- 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);
} else if (CONN_V6(conn)) {
- tcp6_frame_conns[tcp6_payload_used] = conn;
- iov = tcp6_l2_iov[tcp6_payload_used];
- iov[TCP_IOV_IP] =
- IOV_OF_LVALUE(tcp6_payload_ip[tcp6_payload_used++]);
+ iov[TCP_IOV_IP] = IOV_OF_LVALUE(tcp6_payload_ip[tcp_payload_used]);
iov[TCP_IOV_ETH].iov_base = &tcp6_eth_src;
- 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);
}
+ l4len = tcp_l2_buf_fill_headers(conn, iov, dlen, check, seq, false);
+ iov[TCP_IOV_PAYLOAD].iov_len = l4len;
+ if (++tcp_payload_used > TCP_FRAMES_MEM - 1)
+ tcp_payload_flush(c);
}
/**
@@ -388,8 +293,7 @@ int tcp_buf_data_from_sock(const struct ctx *c, struct tcp_tap_conn *conn)
{
uint32_t wnd_scaled = conn->wnd_from_tap << conn->ws_from_tap;
int fill_bufs, send_bufs = 0, last_len, iov_rem = 0;
- int len, dlen, v4 = CONN_V4(conn);
- int s = conn->sock, i;
+ int len, dlen, i, s = conn->sock;
struct msghdr mh_sock = { 0 };
uint16_t mss = MSS_GET(conn);
uint32_t already_sent, seq;
@@ -436,19 +340,15 @@ int tcp_buf_data_from_sock(const struct ctx *c, struct tcp_tap_conn *conn)
mh_sock.msg_iovlen = fill_bufs;
}
- if (( v4 && tcp4_payload_used + fill_bufs > TCP_FRAMES_MEM) ||
- (!v4 && tcp6_payload_used + fill_bufs > TCP_FRAMES_MEM)) {
+ if (tcp_payload_used + fill_bufs > TCP_FRAMES_MEM) {
tcp_payload_flush(c);
/* Silence Coverity CWE-125 false positive */
- tcp4_payload_used = tcp6_payload_used = 0;
+ tcp_payload_used = 0;
}
for (i = 0, iov = iov_sock + 1; i < fill_bufs; i++, iov++) {
- if (v4)
- iov->iov_base = &tcp4_payload[tcp4_payload_used + i].data;
- else
- iov->iov_base = &tcp6_payload[tcp6_payload_used + i].data;
+ iov->iov_base = &tcp_payload[tcp_payload_used + i].data;
iov->iov_len = mss;
}
if (iov_rem)
@@ -502,7 +402,7 @@ int tcp_buf_data_from_sock(const struct ctx *c, struct tcp_tap_conn *conn)
dlen = mss;
seq = conn->seq_to_tap;
for (i = 0; i < send_bufs; i++) {
- int no_csum = i && i != send_bufs - 1 && tcp4_payload_used;
+ int no_csum = i && i != send_bufs - 1 && tcp_payload_used;
if (i == send_bufs - 1)
dlen = last_len;
diff --git a/tcp_buf.h b/tcp_buf.h
index 8d4b615..49c04d4 100644
--- a/tcp_buf.h
+++ b/tcp_buf.h
@@ -6,8 +6,7 @@
#ifndef TCP_BUF_H
#define TCP_BUF_H
-void tcp_sock4_iov_init(const struct ctx *c);
-void tcp_sock6_iov_init(const struct ctx *c);
+void tcp_sock_iov_init(const struct ctx *c);
void tcp_flags_flush(const struct ctx *c);
void tcp_payload_flush(const struct ctx *c);
int tcp_buf_data_from_sock(const struct ctx *c, struct tcp_tap_conn *conn);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 14:50:57 +0000