Changeset View
Changeset View
Standalone View
Standalone View
sys/netinet/tcp_usrreq.c
| Show First 20 Lines • Show All 1,578 Lines • ▼ Show 20 Lines | tcp_ctloutput(struct socket *so, struct sockopt *sopt) | ||||
| inp = sotoinpcb(so); | inp = sotoinpcb(so); | ||||
| KASSERT(inp != NULL, ("tcp_ctloutput: inp == NULL")); | KASSERT(inp != NULL, ("tcp_ctloutput: inp == NULL")); | ||||
| INP_WLOCK(inp); | INP_WLOCK(inp); | ||||
| if (sopt->sopt_level != IPPROTO_TCP) { | if (sopt->sopt_level != IPPROTO_TCP) { | ||||
| #ifdef INET6 | #ifdef INET6 | ||||
| if (inp->inp_vflag & INP_IPV6PROTO) { | if (inp->inp_vflag & INP_IPV6PROTO) { | ||||
| INP_WUNLOCK(inp); | INP_WUNLOCK(inp); | ||||
| error = ip6_ctloutput(so, sopt); | error = ip6_ctloutput(so, sopt); | ||||
| /* | |||||
bz: Do you want to add a comment here why you are doing this? | |||||
Not Done Inline ActionsDone. tuexen: Done. | |||||
| * In case of the IPV6_USE_MIN_MTU socket option, | |||||
| * the INC_IPV6MINMTU flag to announce a corresponding | |||||
| * MSS during the initial handshake. | |||||
| * If the TCP connection is not in the front states, | |||||
| * just reduce the MSS being used. | |||||
| * This avoids the sending of TCP segments which will | |||||
| * be fragmented at the IPv6 layer. | |||||
| */ | |||||
| if ((error == 0) && | |||||
| (sopt->sopt_dir == SOPT_SET) && | |||||
| (sopt->sopt_level == IPPROTO_IPV6) && | |||||
| (sopt->sopt_name == IPV6_USE_MIN_MTU)) { | |||||
| INP_WLOCK(inp); | |||||
| if ((inp->inp_flags & | |||||
| (INP_TIMEWAIT | INP_DROPPED))) { | |||||
| INP_WUNLOCK(inp); | |||||
| return (ECONNRESET); | |||||
| } | |||||
| inp->inp_inc.inc_flags |= INC_IPV6MINMTU; | |||||
| tp = intotcpcb(inp); | |||||
| if ((tp->t_state >= TCPS_SYN_SENT) && | |||||
| (inp->inp_inc.inc_flags & INC_ISIPV6)) { | |||||
| struct ip6_pktopts *opt; | |||||
| opt = inp->in6p_outputopts; | |||||
| if ((opt != NULL) && | |||||
| (opt->ip6po_minmtu == | |||||
| IP6PO_MINMTU_ALL)) { | |||||
| if (tp->t_maxseg > TCP6_MSS) { | |||||
| tp->t_maxseg = TCP6_MSS; | |||||
| } | |||||
| } | |||||
| } | |||||
| INP_WUNLOCK(inp); | |||||
| } | |||||
| } | } | ||||
| #endif /* INET6 */ | #endif /* INET6 */ | ||||
| #if defined(INET6) && defined(INET) | #if defined(INET6) && defined(INET) | ||||
| else | else | ||||
| #endif | #endif | ||||
| #ifdef INET | #ifdef INET | ||||
| { | { | ||||
| INP_WUNLOCK(inp); | INP_WUNLOCK(inp); | ||||
| ▲ Show 20 Lines • Show All 1,048 Lines • Show Last 20 Lines | |||||
Do you want to add a comment here why you are doing this?