diff options
Diffstat (limited to 'c/src/exec/libnetworking/netinet/tcp_usrreq.c')
| -rw-r--r-- | c/src/exec/libnetworking/netinet/tcp_usrreq.c | 840 |
1 files changed, 0 insertions, 840 deletions
diff --git a/c/src/exec/libnetworking/netinet/tcp_usrreq.c b/c/src/exec/libnetworking/netinet/tcp_usrreq.c deleted file mode 100644 index ecd9d95636..0000000000 --- a/c/src/exec/libnetworking/netinet/tcp_usrreq.c +++ /dev/null @@ -1,840 +0,0 @@ -/* - * Copyright (c) 1982, 1986, 1988, 1993 - * The Regents of the University of California. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * From: @(#)tcp_usrreq.c 8.2 (Berkeley) 1/3/94 - * $Id$ - */ - -#include "opt_tcpdebug.h" - -#include <sys/param.h> -#include <sys/queue.h> -#include <sys/systm.h> -#include <sys/kernel.h> -#include <sys/sysctl.h> -#include <sys/malloc.h> -#include <sys/mbuf.h> -#include <sys/socket.h> -#include <sys/socketvar.h> -#include <sys/protosw.h> -#include <sys/errno.h> -#include <sys/stat.h> - -#include <net/if.h> -#include <net/route.h> - -#include <netinet/in.h> -#include <netinet/in_systm.h> -#include <netinet/ip.h> -#include <netinet/in_pcb.h> -#include <netinet/in_var.h> -#include <netinet/ip_var.h> -#include <netinet/tcp.h> -#include <netinet/tcp_fsm.h> -#include <netinet/tcp_seq.h> -#include <netinet/tcp_timer.h> -#include <netinet/tcp_var.h> -#include <netinet/tcpip.h> -#ifdef TCPDEBUG -#include <netinet/tcp_debug.h> -#endif - -/* - * TCP protocol interface to socket abstraction. - */ -extern char *tcpstates[]; - -static int tcp_attach __P((struct socket *)); -static int tcp_connect __P((struct tcpcb *, struct mbuf *)); -static struct tcpcb * - tcp_disconnect __P((struct tcpcb *)); -static struct tcpcb * - tcp_usrclosed __P((struct tcpcb *)); - -#ifdef TCPDEBUG -#define TCPDEBUG0 int ostate -#define TCPDEBUG1() ostate = tp ? tp->t_state : 0 -#define TCPDEBUG2(req) if (tp && (so->so_options & SO_DEBUG)) \ - tcp_trace(TA_USER, ostate, tp, 0, req) -#else -#define TCPDEBUG0 -#define TCPDEBUG1() -#define TCPDEBUG2(req) -#endif - -/* - * TCP attaches to socket via pru_attach(), reserving space, - * and an internet control block. - */ -static int -tcp_usr_attach(struct socket *so, int proto) -{ - int s = splnet(); - int error; - struct inpcb *inp = sotoinpcb(so); - struct tcpcb *tp = 0; - TCPDEBUG0; - - TCPDEBUG1(); - if (inp) { - error = EISCONN; - goto out; - } - - error = tcp_attach(so); - if (error) - goto out; - - if ((so->so_options & SO_LINGER) && so->so_linger == 0) - so->so_linger = TCP_LINGERTIME * hz; - tp = sototcpcb(so); -out: - TCPDEBUG2(PRU_ATTACH); - splx(s); - return error; -} - -/* - * pru_detach() detaches the TCP protocol from the socket. - * If the protocol state is non-embryonic, then can't - * do this directly: have to initiate a pru_disconnect(), - * which may finish later; embryonic TCB's can just - * be discarded here. - */ -static int -tcp_usr_detach(struct socket *so) -{ - int s = splnet(); - int error = 0; - struct inpcb *inp = sotoinpcb(so); - struct tcpcb *tp; - TCPDEBUG0; - - if (inp == 0) { - splx(s); - return EINVAL; /* XXX */ - } - tp = intotcpcb(inp); - TCPDEBUG1(); - if (tp->t_state > TCPS_LISTEN) - tp = tcp_disconnect(tp); - else - tp = tcp_close(tp); - - TCPDEBUG2(PRU_DETACH); - splx(s); - return error; -} - -#define COMMON_START() TCPDEBUG0; \ - do { \ - if (inp == 0) { \ - splx(s); \ - return EINVAL; \ - } \ - tp = intotcpcb(inp); \ - TCPDEBUG1(); \ - } while(0) - -#define COMMON_END(req) out: TCPDEBUG2(req); splx(s); return error; goto out - - -/* - * Give the socket an address. - */ -static int -tcp_usr_bind(struct socket *so, struct mbuf *nam) -{ - int s = splnet(); - int error = 0; - struct inpcb *inp = sotoinpcb(so); - struct tcpcb *tp; - struct sockaddr_in *sinp; - - COMMON_START(); - - /* - * Must check for multicast addresses and disallow binding - * to them. - */ - sinp = mtod(nam, struct sockaddr_in *); - if (sinp->sin_family == AF_INET && - IN_MULTICAST(ntohl(sinp->sin_addr.s_addr))) { - error = EAFNOSUPPORT; - goto out; - } - error = in_pcbbind(inp, nam); - if (error) - goto out; - COMMON_END(PRU_BIND); - -} - -/* - * Prepare to accept connections. - */ -static int -tcp_usr_listen(struct socket *so) -{ - int s = splnet(); - int error = 0; - struct inpcb *inp = sotoinpcb(so); - struct tcpcb *tp; - - COMMON_START(); - if (inp->inp_lport == 0) - error = in_pcbbind(inp, NULL); - if (error == 0) - tp->t_state = TCPS_LISTEN; - COMMON_END(PRU_LISTEN); -} - -/* - * Initiate connection to peer. - * Create a template for use in transmissions on this connection. - * Enter SYN_SENT state, and mark socket as connecting. - * Start keep-alive timer, and seed output sequence space. - * Send initial segment on connection. - */ -static int -tcp_usr_connect(struct socket *so, struct mbuf *nam) -{ - int s = splnet(); - int error = 0; - struct inpcb *inp = sotoinpcb(so); - struct tcpcb *tp; - struct sockaddr_in *sinp; - - COMMON_START(); - - /* - * Must disallow TCP ``connections'' to multicast addresses. - */ - sinp = mtod(nam, struct sockaddr_in *); - if (sinp->sin_family == AF_INET - && IN_MULTICAST(ntohl(sinp->sin_addr.s_addr))) { - error = EAFNOSUPPORT; - goto out; - } - - if ((error = tcp_connect(tp, nam)) != 0) - goto out; - error = tcp_output(tp); - COMMON_END(PRU_CONNECT); -} - -/* - * Initiate disconnect from peer. - * If connection never passed embryonic stage, just drop; - * else if don't need to let data drain, then can just drop anyways, - * else have to begin TCP shutdown process: mark socket disconnecting, - * drain unread data, state switch to reflect user close, and - * send segment (e.g. FIN) to peer. Socket will be really disconnected - * when peer sends FIN and acks ours. - * - * SHOULD IMPLEMENT LATER PRU_CONNECT VIA REALLOC TCPCB. - */ -static int -tcp_usr_disconnect(struct socket *so) -{ - int s = splnet(); - int error = 0; - struct inpcb *inp = sotoinpcb(so); - struct tcpcb *tp; - - COMMON_START(); - tp = tcp_disconnect(tp); - COMMON_END(PRU_DISCONNECT); -} - -/* - * Accept a connection. Essentially all the work is - * done at higher levels; just return the address - * of the peer, storing through addr. - */ -static int -tcp_usr_accept(struct socket *so, struct mbuf *nam) -{ - int s = splnet(); - int error = 0; - struct inpcb *inp = sotoinpcb(so); - struct tcpcb *tp; - - COMMON_START(); - in_setpeeraddr(inp, nam); - COMMON_END(PRU_ACCEPT); -} - -/* - * Mark the connection as being incapable of further output. - */ -static int -tcp_usr_shutdown(struct socket *so) -{ - int s = splnet(); - int error = 0; - struct inpcb *inp = sotoinpcb(so); - struct tcpcb *tp; - - COMMON_START(); - socantsendmore(so); - tp = tcp_usrclosed(tp); - if (tp) - error = tcp_output(tp); - COMMON_END(PRU_SHUTDOWN); -} - -/* - * After a receive, possibly send window update to peer. - */ -static int -tcp_usr_rcvd(struct socket *so, int flags) -{ - int s = splnet(); - int error = 0; - struct inpcb *inp = sotoinpcb(so); - struct tcpcb *tp; - - COMMON_START(); - tcp_output(tp); - COMMON_END(PRU_RCVD); -} - -/* - * Do a send by putting data in output queue and updating urgent - * marker if URG set. Possibly send more data. - */ -static int -tcp_usr_send(struct socket *so, int flags, struct mbuf *m, struct mbuf *nam, - struct mbuf *control) -{ - int s = splnet(); - int error = 0; - struct inpcb *inp = sotoinpcb(so); - struct tcpcb *tp; - - COMMON_START(); - if (control && control->m_len) { - m_freem(control); /* XXX shouldn't caller do this??? */ - if (m) - m_freem(m); - error = EINVAL; - goto out; - } - - if(!(flags & PRUS_OOB)) { - sbappend(&so->so_snd, m); - if (nam && tp->t_state < TCPS_SYN_SENT) { - /* - * Do implied connect if not yet connected, - * initialize window to default value, and - * initialize maxseg/maxopd using peer's cached - * MSS. - */ - error = tcp_connect(tp, nam); - if (error) - goto out; - tp->snd_wnd = TTCP_CLIENT_SND_WND; - tcp_mss(tp, -1); - } - - if (flags & PRUS_EOF) { - /* - * Close the send side of the connection after - * the data is sent. - */ - socantsendmore(so); - tp = tcp_usrclosed(tp); - } - if (tp != NULL) - error = tcp_output(tp); - } else { - if (sbspace(&so->so_snd) < -512) { - m_freem(m); - error = ENOBUFS; - goto out; - } - /* - * According to RFC961 (Assigned Protocols), - * the urgent pointer points to the last octet - * of urgent data. We continue, however, - * to consider it to indicate the first octet - * of data past the urgent section. - * Otherwise, snd_up should be one lower. - */ - sbappend(&so->so_snd, m); - if (nam && tp->t_state < TCPS_SYN_SENT) { - /* - * Do implied connect if not yet connected, - * initialize window to default value, and - * initialize maxseg/maxopd using peer's cached - * MSS. - */ - error = tcp_connect(tp, nam); - if (error) - goto out; - tp->snd_wnd = TTCP_CLIENT_SND_WND; - tcp_mss(tp, -1); - } - tp->snd_up = tp->snd_una + so->so_snd.sb_cc; - tp->t_force = 1; - error = tcp_output(tp); - tp->t_force = 0; - } - COMMON_END((flags & PRUS_OOB) ? PRU_SENDOOB : - ((flags & PRUS_EOF) ? PRU_SEND_EOF : PRU_SEND)); -} - -/* - * Abort the TCP. - */ -static int -tcp_usr_abort(struct socket *so) -{ - int s = splnet(); - int error = 0; - struct inpcb *inp = sotoinpcb(so); - struct tcpcb *tp; - - COMMON_START(); - tp = tcp_drop(tp, ECONNABORTED); - COMMON_END(PRU_ABORT); -} - -/* - * Fill in st_bklsize for fstat() operations on a socket. - */ -static int -tcp_usr_sense(struct socket *so, struct stat *sb) -{ - int s = splnet(); - - sb->st_blksize = so->so_snd.sb_hiwat; - splx(s); - return 0; -} - -/* - * Receive out-of-band data. - */ -static int -tcp_usr_rcvoob(struct socket *so, struct mbuf *m, int flags) -{ - int s = splnet(); - int error = 0; - struct inpcb *inp = sotoinpcb(so); - struct tcpcb *tp; - - COMMON_START(); - if ((so->so_oobmark == 0 && - (so->so_state & SS_RCVATMARK) == 0) || - so->so_options & SO_OOBINLINE || - tp->t_oobflags & TCPOOB_HADDATA) { - error = EINVAL; - goto out; - } - if ((tp->t_oobflags & TCPOOB_HAVEDATA) == 0) { - error = EWOULDBLOCK; - goto out; - } - m->m_len = 1; - *mtod(m, caddr_t) = tp->t_iobc; - if ((flags & MSG_PEEK) == 0) - tp->t_oobflags ^= (TCPOOB_HAVEDATA | TCPOOB_HADDATA); - COMMON_END(PRU_RCVOOB); -} - -static int -tcp_usr_sockaddr(struct socket *so, struct mbuf *nam) -{ - int s = splnet(); - int error = 0; - struct inpcb *inp = sotoinpcb(so); - struct tcpcb *tp; - - COMMON_START(); - in_setsockaddr(inp, nam); - COMMON_END(PRU_SOCKADDR); -} - -static int -tcp_usr_peeraddr(struct socket *so, struct mbuf *nam) -{ - int s = splnet(); - int error = 0; - struct inpcb *inp = sotoinpcb(so); - struct tcpcb *tp; - - COMMON_START(); - in_setpeeraddr(inp, nam); - COMMON_END(PRU_PEERADDR); -} - -/* - * XXX - this should just be a call to in_control, but we need to get - * the types worked out. - */ -static int -tcp_usr_control(struct socket *so, int cmd, caddr_t arg, struct ifnet *ifp) -{ - return in_control(so, cmd, arg, ifp); -} - -/* xxx - should be const */ -struct pr_usrreqs tcp_usrreqs = { - tcp_usr_abort, tcp_usr_accept, tcp_usr_attach, tcp_usr_bind, - tcp_usr_connect, pru_connect2_notsupp, tcp_usr_control, tcp_usr_detach, - tcp_usr_disconnect, tcp_usr_listen, tcp_usr_peeraddr, tcp_usr_rcvd, - tcp_usr_rcvoob, tcp_usr_send, tcp_usr_sense, tcp_usr_shutdown, - tcp_usr_sockaddr -}; - -/* - * Common subroutine to open a TCP connection to remote host specified - * by struct sockaddr_in in mbuf *nam. Call in_pcbbind to assign a local - * port number if needed. Call in_pcbladdr to do the routing and to choose - * a local host address (interface). If there is an existing incarnation - * of the same connection in TIME-WAIT state and if the remote host was - * sending CC options and if the connection duration was < MSL, then - * truncate the previous TIME-WAIT state and proceed. - * Initialize connection parameters and enter SYN-SENT state. - */ -static int -tcp_connect(tp, nam) - register struct tcpcb *tp; - struct mbuf *nam; -{ - struct inpcb *inp = tp->t_inpcb, *oinp; - struct socket *so = inp->inp_socket; - struct tcpcb *otp; - struct sockaddr_in *sin = mtod(nam, struct sockaddr_in *); - struct sockaddr_in *ifaddr; - int error; - struct rmxp_tao *taop; - struct rmxp_tao tao_noncached; - - if (inp->inp_lport == 0) { - error = in_pcbbind(inp, NULL); - if (error) - return error; - } - - /* - * Cannot simply call in_pcbconnect, because there might be an - * earlier incarnation of this same connection still in - * TIME_WAIT state, creating an ADDRINUSE error. - */ - error = in_pcbladdr(inp, nam, &ifaddr); - if (error) - return error; - oinp = in_pcblookuphash(inp->inp_pcbinfo, - sin->sin_addr, sin->sin_port, - inp->inp_laddr.s_addr != INADDR_ANY ? inp->inp_laddr - : ifaddr->sin_addr, - inp->inp_lport, 0); - if (oinp) { - if (oinp != inp && (otp = intotcpcb(oinp)) != NULL && - otp->t_state == TCPS_TIME_WAIT && - otp->t_duration < TCPTV_MSL && - (otp->t_flags & TF_RCVD_CC)) - otp = tcp_close(otp); - else - return EADDRINUSE; - } - if (inp->inp_laddr.s_addr == INADDR_ANY) - inp->inp_laddr = ifaddr->sin_addr; - inp->inp_faddr = sin->sin_addr; - inp->inp_fport = sin->sin_port; - in_pcbrehash(inp); - - tp->t_template = tcp_template(tp); - if (tp->t_template == 0) { - in_pcbdisconnect(inp); - return ENOBUFS; - } - - /* Compute window scaling to request. */ - while (tp->request_r_scale < TCP_MAX_WINSHIFT && - (TCP_MAXWIN << tp->request_r_scale) < so->so_rcv.sb_hiwat) - tp->request_r_scale++; - - soisconnecting(so); - tcpstat.tcps_connattempt++; - tp->t_state = TCPS_SYN_SENT; - tp->t_timer[TCPT_KEEP] = tcp_keepinit; - tp->iss = tcp_iss; tcp_iss += TCP_ISSINCR/2; - tcp_sendseqinit(tp); - - /* - * Generate a CC value for this connection and - * check whether CC or CCnew should be used. - */ - if ((taop = tcp_gettaocache(tp->t_inpcb)) == NULL) { - taop = &tao_noncached; - bzero(taop, sizeof(*taop)); - } - - tp->cc_send = CC_INC(tcp_ccgen); - if (taop->tao_ccsent != 0 && - CC_GEQ(tp->cc_send, taop->tao_ccsent)) { - taop->tao_ccsent = tp->cc_send; - } else { - taop->tao_ccsent = 0; - tp->t_flags |= TF_SENDCCNEW; - } - - return 0; -} - -int -tcp_ctloutput(op, so, level, optname, mp) - int op; - struct socket *so; - int level, optname; - struct mbuf **mp; -{ - int error = 0, s; - struct inpcb *inp; - register struct tcpcb *tp; - register struct mbuf *m; - register int i; - - s = splnet(); - inp = sotoinpcb(so); - if (inp == NULL) { - splx(s); - if (op == PRCO_SETOPT && *mp) - (void) m_free(*mp); - return (ECONNRESET); - } - if (level != IPPROTO_TCP) { - error = ip_ctloutput(op, so, level, optname, mp); - splx(s); - return (error); - } - tp = intotcpcb(inp); - - switch (op) { - - case PRCO_SETOPT: - m = *mp; - switch (optname) { - - case TCP_NODELAY: - if (m == NULL || m->m_len < sizeof (int)) - error = EINVAL; - else if (*mtod(m, int *)) - tp->t_flags |= TF_NODELAY; - else - tp->t_flags &= ~TF_NODELAY; - break; - - case TCP_MAXSEG: - if (m && (i = *mtod(m, int *)) > 0 && i <= tp->t_maxseg) - tp->t_maxseg = i; - else - error = EINVAL; - break; - - case TCP_NOOPT: - if (m == NULL || m->m_len < sizeof (int)) - error = EINVAL; - else if (*mtod(m, int *)) - tp->t_flags |= TF_NOOPT; - else - tp->t_flags &= ~TF_NOOPT; - break; - - case TCP_NOPUSH: - if (m == NULL || m->m_len < sizeof (int)) - error = EINVAL; - else if (*mtod(m, int *)) - tp->t_flags |= TF_NOPUSH; - else - tp->t_flags &= ~TF_NOPUSH; - break; - - default: - error = ENOPROTOOPT; - break; - } - if (m) - (void) m_free(m); - break; - - case PRCO_GETOPT: - *mp = m = m_get(M_WAIT, MT_SOOPTS); - m->m_len = sizeof(int); - - switch (optname) { - case TCP_NODELAY: - *mtod(m, int *) = tp->t_flags & TF_NODELAY; - break; - case TCP_MAXSEG: - *mtod(m, int *) = tp->t_maxseg; - break; - case TCP_NOOPT: - *mtod(m, int *) = tp->t_flags & TF_NOOPT; - break; - case TCP_NOPUSH: - *mtod(m, int *) = tp->t_flags & TF_NOPUSH; - break; - default: - error = ENOPROTOOPT; - break; - } - break; - } - splx(s); - return (error); -} - -/* - * tcp_sendspace and tcp_recvspace are the default send and receive window - * sizes, respectively. These are obsolescent (this information should - * be set by the route). - */ -u_long tcp_sendspace = 1024*16; -SYSCTL_INT(_net_inet_tcp, TCPCTL_SENDSPACE, sendspace, - CTLFLAG_RW, &tcp_sendspace , 0, ""); -u_long tcp_recvspace = 1024*16; -SYSCTL_INT(_net_inet_tcp, TCPCTL_RECVSPACE, recvspace, - CTLFLAG_RW, &tcp_recvspace , 0, ""); - -/* - * Attach TCP protocol to socket, allocating - * internet protocol control block, tcp control block, - * bufer space, and entering LISTEN state if to accept connections. - */ -static int -tcp_attach(so) - struct socket *so; -{ - register struct tcpcb *tp; - struct inpcb *inp; - int error; - - if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { - error = soreserve(so, tcp_sendspace, tcp_recvspace); - if (error) - return (error); - } - error = in_pcballoc(so, &tcbinfo); - if (error) - return (error); - inp = sotoinpcb(so); - tp = tcp_newtcpcb(inp); - if (tp == 0) { - int nofd = so->so_state & SS_NOFDREF; /* XXX */ - - so->so_state &= ~SS_NOFDREF; /* don't free the socket yet */ - in_pcbdetach(inp); - so->so_state |= nofd; - return (ENOBUFS); - } - tp->t_state = TCPS_CLOSED; - return (0); -} - -/* - * Initiate (or continue) disconnect. - * If embryonic state, just send reset (once). - * If in ``let data drain'' option and linger null, just drop. - * Otherwise (hard), mark socket disconnecting and drop - * current input data; switch states based on user close, and - * send segment to peer (with FIN). - */ -static struct tcpcb * -tcp_disconnect(tp) - register struct tcpcb *tp; -{ - struct socket *so = tp->t_inpcb->inp_socket; - - if (tp->t_state < TCPS_ESTABLISHED) - tp = tcp_close(tp); - else if ((so->so_options & SO_LINGER) && so->so_linger == 0) - tp = tcp_drop(tp, 0); - else { - soisdisconnecting(so); - sbflush(&so->so_rcv); - tp = tcp_usrclosed(tp); - if (tp) - (void) tcp_output(tp); - } - return (tp); -} - -/* - * User issued close, and wish to trail through shutdown states: - * if never received SYN, just forget it. If got a SYN from peer, - * but haven't sent FIN, then go to FIN_WAIT_1 state to send peer a FIN. - * If already got a FIN from peer, then almost done; go to LAST_ACK - * state. In all other cases, have already sent FIN to peer (e.g. - * after PRU_SHUTDOWN), and just have to play tedious game waiting - * for peer to send FIN or not respond to keep-alives, etc. - * We can let the user exit from the close as soon as the FIN is acked. - */ -static struct tcpcb * -tcp_usrclosed(tp) - register struct tcpcb *tp; -{ - - switch (tp->t_state) { - - case TCPS_CLOSED: - case TCPS_LISTEN: - tp->t_state = TCPS_CLOSED; - tp = tcp_close(tp); - break; - - case TCPS_SYN_SENT: - case TCPS_SYN_RECEIVED: - tp->t_flags |= TF_NEEDFIN; - break; - - case TCPS_ESTABLISHED: - tp->t_state = TCPS_FIN_WAIT_1; - break; - - case TCPS_CLOSE_WAIT: - tp->t_state = TCPS_LAST_ACK; - break; - } - if (tp && tp->t_state >= TCPS_FIN_WAIT_2) { - soisdisconnected(tp->t_inpcb->inp_socket); - /* To prevent the connection hanging in FIN_WAIT_2 forever. */ - if (tp->t_state == TCPS_FIN_WAIT_2) - tp->t_timer[TCPT_2MSL] = tcp_maxidle; - } - return (tp); -} - |