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sys/netinet/tcp_output.c
| Show First 20 Lines • Show All 779 Lines • ▼ Show 20 Lines | send: | ||||
| optlen = 0; | optlen = 0; | ||||
| #ifdef INET6 | #ifdef INET6 | ||||
| if (isipv6) | if (isipv6) | ||||
| hdrlen = sizeof (struct ip6_hdr) + sizeof (struct tcphdr); | hdrlen = sizeof (struct ip6_hdr) + sizeof (struct tcphdr); | ||||
| else | else | ||||
| #endif | #endif | ||||
| hdrlen = sizeof (struct tcpiphdr); | hdrlen = sizeof (struct tcpiphdr); | ||||
| if (flags & TH_SYN) { | |||||
| tp->snd_nxt = tp->iss; | |||||
| } | |||||
| /* | /* | ||||
| * Compute options for segment. | * Compute options for segment. | ||||
| * We only have to care about SYN and established connection | * We only have to care about SYN and established connection | ||||
| * segments. Options for SYN-ACK segments are handled in TCP | * segments. Options for SYN-ACK segments are handled in TCP | ||||
| * syncache. | * syncache. | ||||
| */ | */ | ||||
| to.to_flags = 0; | to.to_flags = 0; | ||||
| if ((tp->t_flags & TF_NOOPT) == 0) { | if ((tp->t_flags & TF_NOOPT) == 0) { | ||||
| /* Maximum segment size. */ | /* Maximum segment size. */ | ||||
| if (flags & TH_SYN) { | if (flags & TH_SYN) { | ||||
| tp->snd_nxt = tp->iss; | |||||
| to.to_mss = tcp_mssopt(&tp->t_inpcb->inp_inc); | to.to_mss = tcp_mssopt(&tp->t_inpcb->inp_inc); | ||||
| to.to_flags |= TOF_MSS; | to.to_flags |= TOF_MSS; | ||||
| /* | /* | ||||
| * On SYN or SYN|ACK transmits on TFO connections, | * On SYN or SYN|ACK transmits on TFO connections, | ||||
| * only include the TFO option if it is not a | * only include the TFO option if it is not a | ||||
| * retransmit, as the presence of the TFO option may | * retransmit, as the presence of the TFO option may | ||||
| * have caused the original SYN or SYN|ACK to have | * have caused the original SYN or SYN|ACK to have | ||||
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