X-Git-Url: https://git.subgeniuskitty.com/unix-history/.git/blobdiff_plain/b2a3d55917a26470f77b73231e70f736b9ba615f..ed554bc5e4201344d7eaad78263566e79428759c:/usr/src/sys/netinet/tcp_usrreq.c diff --git a/usr/src/sys/netinet/tcp_usrreq.c b/usr/src/sys/netinet/tcp_usrreq.c index 155ea50693..38a08d6d0c 100644 --- a/usr/src/sys/netinet/tcp_usrreq.c +++ b/usr/src/sys/netinet/tcp_usrreq.c @@ -1,42 +1,68 @@ /* - * Copyright (c) 1982 Regents of the University of California. - * All rights reserved. The Berkeley software License Agreement - * specifies the terms and conditions for redistribution. + * Copyright (c) 1982, 1986, 1988, 1993 + * The Regents of the University of California. All rights reserved. * - * @(#)tcp_usrreq.c 6.9 (Berkeley) %G% + * 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. + * + * @(#)tcp_usrreq.c 8.2 (Berkeley) 1/3/94 */ -#include "param.h" -#include "systm.h" -#include "mbuf.h" -#include "socket.h" -#include "socketvar.h" -#include "protosw.h" -#include "errno.h" -#include "stat.h" - -#include "../net/if.h" -#include "../net/route.h" - -#include "in.h" -#include "in_pcb.h" -#include "in_systm.h" -#include "ip.h" -#include "ip_var.h" -#include "tcp.h" -#include "tcp_fsm.h" -#include "tcp_seq.h" -#include "tcp_timer.h" -#include "tcp_var.h" -#include "tcpip.h" -#include "tcp_debug.h" +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include /* * TCP protocol interface to socket abstraction. */ extern char *tcpstates[]; -struct tcpcb *tcp_newtcpcb(); -int tcpsenderrors; /* * Process a TCP user request for TCP tb. If this is a send request @@ -44,24 +70,30 @@ int tcpsenderrors; * (called from the software clock routine), then timertype tells which timer. */ /*ARGSUSED*/ -tcp_usrreq(so, req, m, nam, rights) +int +tcp_usrreq(so, req, m, nam, control) struct socket *so; int req; - struct mbuf *m, *nam, *rights; + struct mbuf *m, *nam, *control; { - register struct inpcb *inp = sotoinpcb(so); + register struct inpcb *inp; register struct tcpcb *tp; - int s = splnet(); + int s; int error = 0; int ostate; if (req == PRU_CONTROL) return (in_control(so, (int)m, (caddr_t)nam, - (struct ifnet *)rights)); - if (rights && rights->m_len) { - splx(s); + (struct ifnet *)control)); + if (control && control->m_len) { + m_freem(control); + if (m) + m_freem(m); return (EINVAL); } + + s = splnet(); + inp = sotoinpcb(so); /* * When a TCP is attached to a socket, then there will be * a (struct inpcb) pointed at by the socket, and this @@ -154,9 +186,14 @@ tcp_usrreq(so, req, m, nam, rights) error = ENOBUFS; break; } + /* 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] = TCPTV_KEEP; + tp->t_timer[TCPT_KEEP] = TCPTV_KEEP_INIT; tp->iss = tcp_iss; tcp_iss += TCP_ISSINCR/2; tcp_sendseqinit(tp); error = tcp_output(tp); @@ -189,15 +226,9 @@ tcp_usrreq(so, req, m, nam, rights) * done at higher levels; just return the address * of the peer, storing through addr. */ - case PRU_ACCEPT: { - struct sockaddr_in *sin = mtod(nam, struct sockaddr_in *); - - nam->m_len = sizeof (struct sockaddr_in); - sin->sin_family = AF_INET; - sin->sin_port = inp->inp_fport; - sin->sin_addr = inp->inp_faddr; + case PRU_ACCEPT: + in_setpeeraddr(inp, nam); break; - } /* * Mark the connection as being incapable of further output. @@ -222,16 +253,7 @@ tcp_usrreq(so, req, m, nam, rights) */ case PRU_SEND: sbappend(&so->so_snd, m); -#ifdef notdef - if (tp->t_flags & TF_PUSH) - tp->snd_end = tp->snd_una + so->so_snd.sb_cc; -#endif error = tcp_output(tp); - if (error) { /* XXX fix to use other path */ - if (error == ENOBUFS) /* XXX */ - error = 0; /* XXX */ - tcpsenderrors++; - } break; /* @@ -243,11 +265,13 @@ tcp_usrreq(so, req, m, nam, rights) case PRU_SENSE: ((struct stat *) m)->st_blksize = so->so_snd.sb_hiwat; + (void) splx(s); return (0); case PRU_RCVOOB: if ((so->so_oobmark == 0 && (so->so_state & SS_RCVATMARK) == 0) || + so->so_options & SO_OOBINLINE || tp->t_oobflags & TCPOOB_HADDATA) { error = EINVAL; break; @@ -268,8 +292,16 @@ tcp_usrreq(so, req, m, nam, rights) error = ENOBUFS; break; } - tp->snd_up = tp->snd_una + so->so_snd.sb_cc + 1; + /* + * 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); + tp->snd_up = tp->snd_una + so->so_snd.sb_cc; tp->t_force = 1; error = tcp_output(tp); tp->t_force = 0; @@ -301,19 +333,33 @@ tcp_usrreq(so, req, m, nam, rights) return (error); } +int tcp_ctloutput(op, so, level, optname, mp) int op; struct socket *so; int level, optname; struct mbuf **mp; { - int error = 0; - struct inpcb *inp = sotoinpcb(so); - register struct tcpcb *tp = intotcpcb(inp); + int error = 0, s; + struct inpcb *inp; + register struct tcpcb *tp; register struct mbuf *m; + register int i; - if (level != IPPROTO_TCP) - return (ip_ctloutput(op, so, level, optname, mp)); + 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) { @@ -330,12 +376,19 @@ tcp_ctloutput(op, so, level, optname, mp) tp->t_flags &= ~TF_NODELAY; break; - case TCP_MAXSEG: /* not yet */ + case TCP_MAXSEG: + if (m && (i = *mtod(m, int *)) > 0 && i <= tp->t_maxseg) + tp->t_maxseg = i; + else + error = EINVAL; + break; + default: - error = EINVAL; + error = ENOPROTOOPT; break; } - m_free(m); + if (m) + (void) m_free(m); break; case PRCO_GETOPT: @@ -350,21 +403,24 @@ tcp_ctloutput(op, so, level, optname, mp) *mtod(m, int *) = tp->t_maxseg; break; default: - error = EINVAL; + error = ENOPROTOOPT; break; } break; } + splx(s); return (error); } -int tcp_sendspace = 1024*4; -int tcp_recvspace = 1024*4; +u_long tcp_sendspace = 1024*8; +u_long tcp_recvspace = 1024*8; + /* * Attach TCP protocol to socket, allocating * internet protocol control block, tcp control block, * bufer space, and entering LISTEN state if to accept connections. */ +int tcp_attach(so) struct socket *so; { @@ -372,9 +428,11 @@ tcp_attach(so) struct inpcb *inp; int error; - error = soreserve(so, tcp_sendspace, tcp_recvspace); - if (error) - return (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, &tcb); if (error) return (error);