sys/netinet/tcp_timewait.c

222  *    inp is locked, and is unlocked before returning.
228 	struct inpcb *inp = tp->t_inpcb;
233 	int isipv6 = inp->inp_inc.inc_flags & INC_ISIPV6;
237 	INP_WLOCK_ASSERT(inp);
239 	/* A dropped inp should never transition to TIME_WAIT state. */
240 	KASSERT((inp->inp_flags & INP_DROPPED) == 0, ("tcp_twstart: "
241 	    "(inp->inp_flags & INP_DROPPED) != 0"));
247 			error = in6_localaddr(&inp->in6p_faddr);
253 			error = in_localip(inp->inp_faddr);
258 				INP_WUNLOCK(inp);
284 				INP_WUNLOCK(inp);
292 	tw->tw_inpcb = inp;
293 	in_pcbref(inp);	/* Reference from tw */
298 	so = inp->inp_socket;
351 	inp->inp_ppcb = tw;
352 	inp->inp_flags |= INP_TIMEWAIT;
360 	if (inp->inp_flags & INP_SOCKREF) {
363 		inp->inp_flags &= ~INP_SOCKREF;
364 		INP_WUNLOCK(inp);
370 		INP_WUNLOCK(inp);
379 tcp_twcheck(struct inpcb *inp, struct tcpopt *to, struct tcphdr *th,
387 	INP_WLOCK_ASSERT(inp);
395 	tw = intotw(inp);
481 	INP_WUNLOCK(inp);
490 	struct inpcb *inp;
501 	inp = tw->tw_inpcb;
502 	KASSERT((inp->inp_flags & INP_TIMEWAIT), ("tcp_twclose: !timewait"));
503 	KASSERT(intotw(inp) == tw, ("tcp_twclose: inp_ppcb != tw"));
505 	INP_WLOCK_ASSERT(inp);
508 	inp->inp_ppcb = NULL;
509 	in_pcbdrop(inp);
511 	so = inp->inp_socket;
519 		if (inp->inp_flags & INP_SOCKREF) {
520 			inp->inp_flags &= ~INP_SOCKREF;
521 			INP_WUNLOCK(inp);
534 			INP_WUNLOCK(inp);
541 		in_pcbfree(inp);
549 	struct inpcb *inp = tw->tw_inpcb;
562 	int isipv6 = inp->inp_inc.inc_flags & INC_ISIPV6;
566 	INP_WLOCK_ASSERT(inp);
574 	mac_inpcb_create_mbuf(inp, m);
582 		tcpip_fillheaders(inp, ip6, th);
593 		tcpip_fillheaders(inp, ip, th);
626 		ip6->ip6_hlim = in6_selecthlim(inp, NULL);
628 		error = ip6_output(m, inp->in6p_outputopts, NULL,
629 		    (tw->tw_so_options & SO_DONTROUTE), NULL, NULL, inp);
644 		error = ip_output(m, inp->inp_options, NULL,
646 		    NULL, inp);
676 	struct inpcb *inp;
682 	inp = tw->tw_inpcb;
693 	released = in_pcbrele_wlocked(inp);
694 	KASSERT(!released, ("%s: inp should not be released here", __func__));
705 	struct inpcb *inp;
735 		inp = tw->tw_inpcb;
736 		in_pcbref(inp);
741 			INP_WLOCK(inp);
742 			tw = intotw(inp);
743 			if (in_pcbrele_wlocked(inp)) {
749 					 * state the inp should not be destroyed
756 					    "|| inp last reference) && tw != "
761 					    "|| inp last reference) && tw != "
771 				INP_WUNLOCK(inp);
782 			INP_WLOCK(inp);
783 			if (!in_pcbrele_wlocked(inp))
784 				INP_WUNLOCK(inp);