diff options
Diffstat (limited to 'freebsd/sys/netinet/tcp_output.c')
| -rw-r--r-- | freebsd/sys/netinet/tcp_output.c | 42 |
1 files changed, 22 insertions, 20 deletions
diff --git a/freebsd/sys/netinet/tcp_output.c b/freebsd/sys/netinet/tcp_output.c index a310512e..b39b0bdf 100644 --- a/freebsd/sys/netinet/tcp_output.c +++ b/freebsd/sys/netinet/tcp_output.c @@ -547,6 +547,11 @@ after_sack_rexmit: * (except for the sequence number) for all generated packets. This * makes it impossible to transmit any options which vary per generated * segment or packet. + * + * IPv4 handling has a clear separation of ip options and ip header + * flags while IPv6 combines both in in6p_outputopts. ip6_optlen() does + * the right thing below to provide length of just ip options and thus + * checking for ipoptlen is enough to decide if ip options are present. */ #ifdef IPSEC /* @@ -555,14 +560,25 @@ after_sack_rexmit: */ ipsec_optlen = ipsec_hdrsiz_tcp(tp); #endif + +#ifdef INET6 + if (isipv6) + ipoptlen = ip6_optlen(tp->t_inpcb); + else +#endif + if (tp->t_inpcb->inp_options) + ipoptlen = tp->t_inpcb->inp_options->m_len - + offsetof(struct ipoption, ipopt_list); + else + ipoptlen = 0; +#ifdef IPSEC + ipoptlen += ipsec_optlen; +#endif + if ((tp->t_flags & TF_TSO) && V_tcp_do_tso && len > tp->t_maxseg && ((tp->t_flags & TF_SIGNATURE) == 0) && tp->rcv_numsacks == 0 && sack_rxmit == 0 && -#ifdef IPSEC - ipsec_optlen == 0 && -#endif - tp->t_inpcb->inp_options == NULL && - tp->t_inpcb->in6p_options == NULL) + ipoptlen == 0) tso = 1; if (sack_rxmit) { @@ -835,20 +851,6 @@ send: hdrlen += optlen = tcp_addoptions(&to, opt); } -#ifdef INET6 - if (isipv6) - ipoptlen = ip6_optlen(tp->t_inpcb); - else -#endif - if (tp->t_inpcb->inp_options) - ipoptlen = tp->t_inpcb->inp_options->m_len - - offsetof(struct ipoption, ipopt_list); - else - ipoptlen = 0; -#ifdef IPSEC - ipoptlen += ipsec_optlen; -#endif - /* * Adjust data length if insertion of options will * bump the packet length beyond the t_maxseg length. @@ -1339,7 +1341,7 @@ send: ipov->ih_len = save; } #endif /* TCPDEBUG */ - TCP_PROBE3(debug__output, tp, th, mtod(m, const char *)); + TCP_PROBE3(debug__output, tp, th, m); /* * Fill in IP length and desired time to live and |