diff options
Diffstat (limited to 'tcp_internal.h')
| -rw-r--r-- | tcp_internal.h | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/tcp_internal.h b/tcp_internal.h index f55025c..d940885 100644 --- a/tcp_internal.h +++ b/tcp_internal.h @@ -6,6 +6,11 @@ #ifndef TCP_INTERNAL_H #define TCP_INTERNAL_H +#include <stdint.h> +#include <netinet/tcp.h> + +#include "util.h" + #define MAX_WS 8 #define MAX_WINDOW (1 << (16 + (MAX_WS))) @@ -38,6 +43,8 @@ /* Flags for internal usage */ #define DUP_ACK (1 << 5) +#define KEEPALIVE (1 << 6) + #define OPT_EOL 0 #define OPT_NOP 1 #define OPT_MSS 2 @@ -57,12 +64,13 @@ #define CONN_V4(conn) (!!inany_v4(&TAPFLOW(conn)->oaddr)) #define CONN_V6(conn) (!CONN_V4(conn)) -/* +/** * enum tcp_iov_parts - I/O vector parts for one TCP frame * @TCP_IOV_TAP tap backend specific header * @TCP_IOV_ETH Ethernet header * @TCP_IOV_IP IP (v4/v6) header * @TCP_IOV_PAYLOAD IP payload (TCP header + data) + * @TCP_IOV_ETH_PAD Ethernet (802.3) padding to 60 bytes * @TCP_NUM_IOVS the number of entries in the iovec array */ enum tcp_iov_parts { @@ -70,6 +78,7 @@ enum tcp_iov_parts { TCP_IOV_ETH = 1, TCP_IOV_IP = 2, TCP_IOV_PAYLOAD = 3, + TCP_IOV_ETH_PAD = 4, TCP_NUM_IOVS }; @@ -174,11 +183,12 @@ void tcp_rst_do(const struct ctx *c, struct tcp_tap_conn *conn); struct tcp_info_linux; -void tcp_fill_headers(const struct ctx *c, struct tcp_tap_conn *conn, - struct tap_hdr *taph, struct ethhdr *eh, - struct iphdr *ip4h, struct ipv6hdr *ip6h, - struct tcphdr *th, struct iov_tail *payload, - const uint16_t *ip4_check, uint32_t seq, bool no_tcp_csum); +size_t tcp_fill_headers(const struct ctx *c, struct tcp_tap_conn *conn, + struct ethhdr *eh, + struct iphdr *ip4h, struct ipv6hdr *ip6h, + struct tcphdr *th, struct iov_tail *payload, + const uint16_t *ip4_check, uint32_t seq, + bool no_tcp_csum); int tcp_update_seqack_wnd(const struct ctx *c, struct tcp_tap_conn *conn, bool force_seq, struct tcp_info_linux *tinfo); |