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-rw-r--r--dhcp.c24
-rw-r--r--dhcp.h1
-rw-r--r--passt.c8
-rw-r--r--tcp.c93
4 files changed, 73 insertions, 53 deletions
diff --git a/dhcp.c b/dhcp.c
index 24194ee..7deced1 100644
--- a/dhcp.c
+++ b/dhcp.c
@@ -46,11 +46,8 @@ struct opt {
unsigned char c[255];
};
-static struct opt opts[255] = {
- [1] = { 0, 4, { 0 }, 0, { 0 }, }, /* Mask */
- [3] = { 0, 4, { 0 }, 0, { 0 }, }, /* Router */
- [51] = { 0, 4, { 0xff, 0xff, 0xff, 0xff }, 0, { 0 }, }, /* Lease time */
- [53] = { 0, 1, { 0 }, 0, { 0 }, }, /* Type */
+static struct opt opts[255];
+
#define DHCPDISCOVER 1
#define DHCPOFFER 2
#define DHCPREQUEST 3
@@ -60,8 +57,21 @@ static struct opt opts[255] = {
#define DHCPRELEASE 7
#define DHCPINFORM 8
#define DHCPFORCERENEW 9
- [54] = { 0, 4, { 0 }, 0, { 0 }, }, /* Server ID */
-};
+
+/**
+ * dhcp_init() - Initialise DHCP options
+ */
+void dhcp_init(void)
+{
+ opts[1] = (struct opt) { 0, 4, { 0 }, 0, { 0 }, }; /* Mask */
+ opts[3] = (struct opt) { 0, 4, { 0 }, 0, { 0 }, }; /* Router */
+ opts[51] = (struct opt) { 0, 4, { 0xff,
+ 0xff,
+ 0xff,
+ 0xff }, 0, { 0 }, }; /* Lease time */
+ opts[53] = (struct opt) { 0, 1, { 0 }, 0, { 0 }, }; /* Type */
+ opts[54] = (struct opt) { 0, 4, { 0 }, 0, { 0 }, }; /* Server ID */
+}
/**
* struct msg - BOOTP/DHCP message
diff --git a/dhcp.h b/dhcp.h
index c4fbfe5..59ec10a 100644
--- a/dhcp.h
+++ b/dhcp.h
@@ -1 +1,2 @@
int dhcp(struct ctx *c, struct ethhdr *eh, size_t len);
+void dhcp_init(void);
diff --git a/passt.c b/passt.c
index 1dc1cca..77cd48c 100644
--- a/passt.c
+++ b/passt.c
@@ -54,6 +54,7 @@
#include "util.h"
#include "passt.h"
+#include "dhcp.h"
#include "dhcpv6.h"
#include "icmp.h"
#include "tcp.h"
@@ -376,8 +377,6 @@ int main(int argc, char **argv)
}
sock_probe_mem(&c);
- proto_update_l2_buf(c.mac_guest, c.mac, &c.addr4);
-
tap_sock_init(&c);
clock_gettime(CLOCK_MONOTONIC, &now);
@@ -386,6 +385,11 @@ int main(int argc, char **argv)
(!c.no_tcp && tcp_sock_init(&c, &now)))
exit(EXIT_FAILURE);
+ proto_update_l2_buf(c.mac_guest, c.mac, &c.addr4);
+
+ if (c.v4 && !c.no_dhcp)
+ dhcp_init();
+
if (c.v6 && !c.no_dhcpv6)
dhcpv6_init(&c);
diff --git a/tcp.c b/tcp.c
index 6752a59..bf7c610 100644
--- a/tcp.c
+++ b/tcp.c
@@ -576,7 +576,7 @@ void tcp_remap_to_init(in_port_t port, in_port_t delta)
* @uh: Headroom for TCP header
* @data: Storage for TCP payload
*/
-__extension__ static struct tcp4_l2_buf_t {
+static struct tcp4_l2_buf_t {
uint32_t psum; /* 0 */
uint32_t tsum; /* 4 */
#ifdef __AVX2__
@@ -593,16 +593,7 @@ __extension__ static struct tcp4_l2_buf_t {
#else
} __attribute__ ((packed, aligned(__alignof__(unsigned int))))
#endif
-tcp4_l2_buf[TCP_TAP_FRAMES] = {
- [ 0 ... TCP_TAP_FRAMES - 1 ] = {
- 0, 0,
-#ifdef __AVX2__
- { 0 },
-#endif
- 0, L2_BUF_ETH_IP4_INIT, L2_BUF_IP4_INIT(IPPROTO_TCP),
- { .doff = sizeof(struct tcphdr) / 4, .ack = 1 }, { 0 },
- },
-};
+tcp4_l2_buf[TCP_TAP_FRAMES];
static int tcp4_l2_buf_mss;
static int tcp4_l2_buf_mss_nr_set;
@@ -618,7 +609,7 @@ static int tcp4_l2_buf_mss_tap_nr_set;
* @th: Headroom for TCP header
* @data: Storage for TCP payload
*/
-__extension__ struct tcp6_l2_buf_t {
+struct tcp6_l2_buf_t {
#ifdef __AVX2__
uint8_t pad[14]; /* 0 align ip6h to 32 bytes */
#else
@@ -635,13 +626,7 @@ __extension__ struct tcp6_l2_buf_t {
#else
} __attribute__ ((packed, aligned(__alignof__(unsigned int))))
#endif
-tcp6_l2_buf[TCP_TAP_FRAMES] = {
- [ 0 ... TCP_TAP_FRAMES - 1 ] = {
- { 0 },
- 0, L2_BUF_ETH_IP6_INIT, L2_BUF_IP6_INIT(IPPROTO_TCP),
- { .doff = sizeof(struct tcphdr) / 4, .ack = 1 }, { 0 },
- },
-};
+tcp6_l2_buf[TCP_TAP_FRAMES];
static int tcp6_l2_buf_mss;
static int tcp6_l2_buf_mss_nr_set;
@@ -661,12 +646,7 @@ static struct iovec tcp6_l2_flags_iov_tap [TCP_TAP_FRAMES];
static struct msghdr tcp4_l2_mh_sock;
static struct msghdr tcp6_l2_mh_sock;
-__extension__
-static struct mmsghdr tcp_l2_mh_tap [TCP_TAP_FRAMES] = {
- [ 0 ... TCP_TAP_FRAMES - 1 ] = {
- .msg_hdr.msg_iovlen = 1,
- },
-};
+static struct mmsghdr tcp_l2_mh_tap [TCP_TAP_FRAMES];
/* sendmsg() to socket */
static struct iovec tcp_tap_iov [UIO_MAXIOV];
@@ -682,7 +662,7 @@ static struct iovec tcp_tap_iov [UIO_MAXIOV];
* @th: Headroom for TCP header
* @opts: Headroom for TCP options
*/
-__extension__ static struct tcp4_l2_flags_buf_t {
+static struct tcp4_l2_flags_buf_t {
uint32_t psum; /* 0 */
uint32_t tsum; /* 4 */
#ifdef __AVX2__
@@ -699,16 +679,7 @@ __extension__ static struct tcp4_l2_flags_buf_t {
#else
} __attribute__ ((packed, aligned(__alignof__(unsigned int))))
#endif
-tcp4_l2_flags_buf[TCP_TAP_FRAMES] = {
- [ 0 ... TCP_TAP_FRAMES - 1 ] = {
- 0, 0,
-#ifdef __AVX2__
- { 0 },
-#endif
- 0, L2_BUF_ETH_IP4_INIT, L2_BUF_IP4_INIT(IPPROTO_TCP),
- { 0 }, { 0 },
- },
-};
+tcp4_l2_flags_buf[TCP_TAP_FRAMES];
static int tcp4_l2_flags_buf_used;
@@ -721,7 +692,7 @@ static int tcp4_l2_flags_buf_used;
* @th: Headroom for TCP header
* @opts: Headroom for TCP options
*/
-__extension__ struct tcp6_l2_flags_buf_t {
+static struct tcp6_l2_flags_buf_t {
#ifdef __AVX2__
uint8_t pad[14]; /* 0 align ip6h to 32 bytes */
#else
@@ -737,13 +708,7 @@ __extension__ struct tcp6_l2_flags_buf_t {
#else
} __attribute__ ((packed, aligned(__alignof__(unsigned int))))
#endif
-tcp6_l2_flags_buf[TCP_TAP_FRAMES] = {
- [ 0 ... TCP_TAP_FRAMES - 1 ] = {
- { 0 },
- 0, L2_BUF_ETH_IP6_INIT, L2_BUF_IP6_INIT(IPPROTO_TCP),
- { 0 }, { 0 },
- },
-};
+tcp6_l2_flags_buf[TCP_TAP_FRAMES];
static int tcp6_l2_flags_buf_used;
@@ -984,6 +949,26 @@ static void tcp_sock4_iov_init(void)
struct iovec *iov;
int i;
+ for (i = 0; i < ARRAY_SIZE(tcp4_l2_buf); i++) {
+ tcp4_l2_buf[i] = (struct tcp4_l2_buf_t) { 0, 0,
+#ifdef __AVX2__
+ { 0 },
+#endif
+ 0, L2_BUF_ETH_IP4_INIT, L2_BUF_IP4_INIT(IPPROTO_TCP),
+ { .doff = sizeof(struct tcphdr) / 4, .ack = 1 }, { 0 },
+ };
+ }
+
+ for (i = 0; i < ARRAY_SIZE(tcp4_l2_flags_buf); i++) {
+ tcp4_l2_flags_buf[i] = (struct tcp4_l2_flags_buf_t) { 0, 0,
+#ifdef __AVX2__
+ { 0 },
+#endif
+ 0, L2_BUF_ETH_IP4_INIT, L2_BUF_IP4_INIT(IPPROTO_TCP),
+ { 0 }, { 0 },
+ };
+ }
+
tcp4_l2_iov_sock[0].iov_base = tcp_buf_discard;
for (i = 0, iov = tcp4_l2_iov_sock + 1; i < TCP_TAP_FRAMES;
i++, iov++) {
@@ -1010,6 +995,22 @@ static void tcp_sock6_iov_init(void)
struct iovec *iov;
int i;
+ for (i = 0; i < ARRAY_SIZE(tcp6_l2_buf); i++) {
+ tcp6_l2_buf[i] = (struct tcp6_l2_buf_t) {
+ { 0 },
+ 0, L2_BUF_ETH_IP6_INIT, L2_BUF_IP6_INIT(IPPROTO_TCP),
+ { .doff = sizeof(struct tcphdr) / 4, .ack = 1 }, { 0 },
+ };
+ }
+
+ for (i = 0; i < ARRAY_SIZE(tcp6_l2_flags_buf); i++) {
+ tcp6_l2_flags_buf[i] = (struct tcp6_l2_flags_buf_t) {
+ { 0 },
+ 0, L2_BUF_ETH_IP6_INIT, L2_BUF_IP6_INIT(IPPROTO_TCP),
+ { 0 }, { 0 },
+ };
+ }
+
tcp6_l2_iov_sock[0].iov_base = tcp_buf_discard;
for (i = 0, iov = tcp6_l2_iov_sock + 1; i < TCP_TAP_FRAMES;
i++, iov++) {
@@ -3529,6 +3530,7 @@ int tcp_sock_init(struct ctx *c, struct timespec *now)
{
struct tcp_sock_refill_arg refill_arg = { c, 0 };
in_port_t port;
+ int i;
getrandom(&c->tcp.hash_secret, sizeof(c->tcp.hash_secret), GRND_RANDOM);
@@ -3539,6 +3541,9 @@ int tcp_sock_init(struct ctx *c, struct timespec *now)
tcp_sock_init_one(c, 0, port);
}
+ for (i = 0; i < ARRAY_SIZE(tcp_l2_mh_tap); i++)
+ tcp_l2_mh_tap[i] = (struct mmsghdr) { .msg_hdr.msg_iovlen = 1 };
+
if (c->v4)
tcp_sock4_iov_init();
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-24 18:30:00 +0000