TCP_SYN is only used within LwIP.
 
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TCP_SYN macro

Syntax

#define TCP_SYN 0x02U

References

LocationText
tcp.h:73
#define TCP_SYN 0x02U
tcp.c:1169
ret = tcp_enqueue_flags(pcb, TCP_SYN);
tcp_in.c:236
if (flags & (TCP_FIN | TCP_SYN)) {
tcp_in.c:651
} else if (flags & TCP_SYN) {
tcp_in.c:719
rc = tcp_enqueue_flags(npcb, TCP_SYN | TCP_ACK);
tcp_in.c:753
if (flags & TCP_SYN) {
tcp_in.c:837
if ((flags & TCP_SYN) && (pcb->state != SYN_SENT && pcb->state != SYN_RCVD)) {
tcp_in.c:858
if ((flags & TCP_ACK) && (flags & TCP_SYN)
tcp_in.c:974
} else if ((flags & TCP_SYN) && (seqno == pcb->rcv_nxt - 1)) {
tcp_in.c:1478
if (TCPH_FLAGS(inseg.tcphdr) & TCP_SYN) {
tcp_out.c:1011
if ((TCPH_FLAGS(last_unsent->tcphdr) & (TCP_SYN | TCP_FIN | TCP_RST)) == 0) {
tcp_out.c:1042
(flags & (TCP_SYN | TCP_FIN)) != 0);
tcp_out.c:1049
if (flags & TCP_SYN) {
tcp_out.c:1113
if ((flags & TCP_SYN) || (flags & TCP_FIN)) {
tcp_priv.h:155
#define TCP_TCPLEN(seg) ((seg)->len + (((TCPH_FLAGS((seg)->tcphdr) & (TCP_FIN | TCP_SYN)) != 0) ? 1U : 0U))