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99679ececc
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1071 c046a42c-6fe2-441c-8c8c-71466251a162
1325 lines
35 KiB
C
1325 lines
35 KiB
C
/*
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* Copyright (c) 1982, 1986, 1988, 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)tcp_subr.c 8.1 (Berkeley) 6/10/93
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* tcp_subr.c,v 1.5 1994/10/08 22:39:58 phk Exp
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*/
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/*
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* Changes and additions relating to SLiRP
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* Copyright (c) 1995 Danny Gasparovski.
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*
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* Please read the file COPYRIGHT for the
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* terms and conditions of the copyright.
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*/
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#define WANT_SYS_IOCTL_H
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#include <slirp.h>
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/* patchable/settable parameters for tcp */
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int tcp_mssdflt = TCP_MSS;
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int tcp_rttdflt = TCPTV_SRTTDFLT / PR_SLOWHZ;
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int tcp_do_rfc1323 = 0; /* Don't do rfc1323 performance enhancements */
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int tcp_rcvspace; /* You may want to change this */
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int tcp_sndspace; /* Keep small if you have an error prone link */
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/*
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* Tcp initialization
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*/
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void
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tcp_init()
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{
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tcp_iss = 1; /* wrong */
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tcb.so_next = tcb.so_prev = &tcb;
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/* tcp_rcvspace = our Window we advertise to the remote */
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tcp_rcvspace = TCP_RCVSPACE;
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tcp_sndspace = TCP_SNDSPACE;
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/* Make sure tcp_sndspace is at least 2*MSS */
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if (tcp_sndspace < 2*(min(if_mtu, if_mru) - sizeof(struct tcpiphdr)))
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tcp_sndspace = 2*(min(if_mtu, if_mru) - sizeof(struct tcpiphdr));
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}
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/*
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* Create template to be used to send tcp packets on a connection.
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* Call after host entry created, fills
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* in a skeletal tcp/ip header, minimizing the amount of work
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* necessary when the connection is used.
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*/
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/* struct tcpiphdr * */
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void
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tcp_template(tp)
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struct tcpcb *tp;
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{
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struct socket *so = tp->t_socket;
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register struct tcpiphdr *n = &tp->t_template;
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n->ti_next = n->ti_prev = 0;
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n->ti_x1 = 0;
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n->ti_pr = IPPROTO_TCP;
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n->ti_len = htons(sizeof (struct tcpiphdr) - sizeof (struct ip));
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n->ti_src = so->so_faddr;
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n->ti_dst = so->so_laddr;
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n->ti_sport = so->so_fport;
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n->ti_dport = so->so_lport;
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n->ti_seq = 0;
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n->ti_ack = 0;
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n->ti_x2 = 0;
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n->ti_off = 5;
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n->ti_flags = 0;
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n->ti_win = 0;
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n->ti_sum = 0;
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n->ti_urp = 0;
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}
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/*
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* Send a single message to the TCP at address specified by
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* the given TCP/IP header. If m == 0, then we make a copy
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* of the tcpiphdr at ti and send directly to the addressed host.
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* This is used to force keep alive messages out using the TCP
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* template for a connection tp->t_template. If flags are given
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* then we send a message back to the TCP which originated the
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* segment ti, and discard the mbuf containing it and any other
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* attached mbufs.
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*
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* In any case the ack and sequence number of the transmitted
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* segment are as specified by the parameters.
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*/
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void
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tcp_respond(tp, ti, m, ack, seq, flags)
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struct tcpcb *tp;
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register struct tcpiphdr *ti;
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register struct mbuf *m;
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tcp_seq ack, seq;
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int flags;
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{
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register int tlen;
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int win = 0;
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DEBUG_CALL("tcp_respond");
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DEBUG_ARG("tp = %lx", (long)tp);
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DEBUG_ARG("ti = %lx", (long)ti);
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DEBUG_ARG("m = %lx", (long)m);
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DEBUG_ARG("ack = %u", ack);
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DEBUG_ARG("seq = %u", seq);
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DEBUG_ARG("flags = %x", flags);
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if (tp)
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win = sbspace(&tp->t_socket->so_rcv);
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if (m == 0) {
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if ((m = m_get()) == NULL)
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return;
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#ifdef TCP_COMPAT_42
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tlen = 1;
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#else
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tlen = 0;
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#endif
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m->m_data += if_maxlinkhdr;
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*mtod(m, struct tcpiphdr *) = *ti;
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ti = mtod(m, struct tcpiphdr *);
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flags = TH_ACK;
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} else {
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/*
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* ti points into m so the next line is just making
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* the mbuf point to ti
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*/
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m->m_data = (caddr_t)ti;
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m->m_len = sizeof (struct tcpiphdr);
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tlen = 0;
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#define xchg(a,b,type) { type t; t=a; a=b; b=t; }
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xchg(ti->ti_dst.s_addr, ti->ti_src.s_addr, u_int32_t);
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xchg(ti->ti_dport, ti->ti_sport, u_int16_t);
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#undef xchg
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}
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ti->ti_len = htons((u_short)(sizeof (struct tcphdr) + tlen));
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tlen += sizeof (struct tcpiphdr);
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m->m_len = tlen;
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ti->ti_next = ti->ti_prev = 0;
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ti->ti_x1 = 0;
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ti->ti_seq = htonl(seq);
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ti->ti_ack = htonl(ack);
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ti->ti_x2 = 0;
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ti->ti_off = sizeof (struct tcphdr) >> 2;
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ti->ti_flags = flags;
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if (tp)
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ti->ti_win = htons((u_int16_t) (win >> tp->rcv_scale));
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else
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ti->ti_win = htons((u_int16_t)win);
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ti->ti_urp = 0;
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ti->ti_sum = 0;
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ti->ti_sum = cksum(m, tlen);
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((struct ip *)ti)->ip_len = tlen;
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if(flags & TH_RST)
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((struct ip *)ti)->ip_ttl = MAXTTL;
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else
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((struct ip *)ti)->ip_ttl = ip_defttl;
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(void) ip_output((struct socket *)0, m);
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}
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/*
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* Create a new TCP control block, making an
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* empty reassembly queue and hooking it to the argument
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* protocol control block.
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*/
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struct tcpcb *
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tcp_newtcpcb(so)
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struct socket *so;
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{
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register struct tcpcb *tp;
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tp = (struct tcpcb *)malloc(sizeof(*tp));
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if (tp == NULL)
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return ((struct tcpcb *)0);
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memset((char *) tp, 0, sizeof(struct tcpcb));
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tp->seg_next = tp->seg_prev = (tcpiphdrp_32)tp;
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tp->t_maxseg = tcp_mssdflt;
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tp->t_flags = tcp_do_rfc1323 ? (TF_REQ_SCALE|TF_REQ_TSTMP) : 0;
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tp->t_socket = so;
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/*
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* Init srtt to TCPTV_SRTTBASE (0), so we can tell that we have no
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* rtt estimate. Set rttvar so that srtt + 2 * rttvar gives
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* reasonable initial retransmit time.
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*/
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tp->t_srtt = TCPTV_SRTTBASE;
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tp->t_rttvar = tcp_rttdflt * PR_SLOWHZ << 2;
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tp->t_rttmin = TCPTV_MIN;
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TCPT_RANGESET(tp->t_rxtcur,
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((TCPTV_SRTTBASE >> 2) + (TCPTV_SRTTDFLT << 2)) >> 1,
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TCPTV_MIN, TCPTV_REXMTMAX);
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tp->snd_cwnd = TCP_MAXWIN << TCP_MAX_WINSHIFT;
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tp->snd_ssthresh = TCP_MAXWIN << TCP_MAX_WINSHIFT;
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tp->t_state = TCPS_CLOSED;
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so->so_tcpcb = tp;
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return (tp);
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}
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/*
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* Drop a TCP connection, reporting
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* the specified error. If connection is synchronized,
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* then send a RST to peer.
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*/
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struct tcpcb *tcp_drop(struct tcpcb *tp, int err)
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{
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/* tcp_drop(tp, errno)
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register struct tcpcb *tp;
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int errno;
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{
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*/
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DEBUG_CALL("tcp_drop");
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DEBUG_ARG("tp = %lx", (long)tp);
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DEBUG_ARG("errno = %d", errno);
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if (TCPS_HAVERCVDSYN(tp->t_state)) {
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tp->t_state = TCPS_CLOSED;
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(void) tcp_output(tp);
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tcpstat.tcps_drops++;
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} else
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tcpstat.tcps_conndrops++;
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/* if (errno == ETIMEDOUT && tp->t_softerror)
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* errno = tp->t_softerror;
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*/
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/* so->so_error = errno; */
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return (tcp_close(tp));
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}
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/*
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* Close a TCP control block:
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* discard all space held by the tcp
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* discard internet protocol block
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* wake up any sleepers
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*/
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struct tcpcb *
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tcp_close(tp)
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register struct tcpcb *tp;
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{
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register struct tcpiphdr *t;
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struct socket *so = tp->t_socket;
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register struct mbuf *m;
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DEBUG_CALL("tcp_close");
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DEBUG_ARG("tp = %lx", (long )tp);
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/* free the reassembly queue, if any */
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t = (struct tcpiphdr *) tp->seg_next;
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while (t != (struct tcpiphdr *)tp) {
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t = (struct tcpiphdr *)t->ti_next;
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m = (struct mbuf *) REASS_MBUF((struct tcpiphdr *)t->ti_prev);
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remque_32((struct tcpiphdr *) t->ti_prev);
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m_freem(m);
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}
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/* It's static */
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/* if (tp->t_template)
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* (void) m_free(dtom(tp->t_template));
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*/
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/* free(tp, M_PCB); */
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free(tp);
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so->so_tcpcb = 0;
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soisfdisconnected(so);
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/* clobber input socket cache if we're closing the cached connection */
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if (so == tcp_last_so)
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tcp_last_so = &tcb;
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closesocket(so->s);
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sbfree(&so->so_rcv);
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sbfree(&so->so_snd);
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sofree(so);
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tcpstat.tcps_closed++;
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return ((struct tcpcb *)0);
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}
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void
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tcp_drain()
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{
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/* XXX */
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}
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/*
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* When a source quench is received, close congestion window
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* to one segment. We will gradually open it again as we proceed.
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*/
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#ifdef notdef
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void
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tcp_quench(i, errno)
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int errno;
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{
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struct tcpcb *tp = intotcpcb(inp);
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if (tp)
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tp->snd_cwnd = tp->t_maxseg;
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}
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#endif /* notdef */
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|
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/*
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* TCP protocol interface to socket abstraction.
|
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*/
|
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|
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/*
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* User issued close, and wish to trail through shutdown states:
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* if never received SYN, just forget it. If got a SYN from peer,
|
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* but haven't sent FIN, then go to FIN_WAIT_1 state to send peer a FIN.
|
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* If already got a FIN from peer, then almost done; go to LAST_ACK
|
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* state. In all other cases, have already sent FIN to peer (e.g.
|
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* after PRU_SHUTDOWN), and just have to play tedious game waiting
|
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* for peer to send FIN or not respond to keep-alives, etc.
|
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* We can let the user exit from the close as soon as the FIN is acked.
|
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*/
|
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void
|
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tcp_sockclosed(tp)
|
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struct tcpcb *tp;
|
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{
|
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|
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DEBUG_CALL("tcp_sockclosed");
|
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DEBUG_ARG("tp = %lx", (long)tp);
|
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|
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switch (tp->t_state) {
|
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|
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case TCPS_CLOSED:
|
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case TCPS_LISTEN:
|
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case TCPS_SYN_SENT:
|
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tp->t_state = TCPS_CLOSED;
|
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tp = tcp_close(tp);
|
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break;
|
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|
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case TCPS_SYN_RECEIVED:
|
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case TCPS_ESTABLISHED:
|
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tp->t_state = TCPS_FIN_WAIT_1;
|
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break;
|
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|
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case TCPS_CLOSE_WAIT:
|
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tp->t_state = TCPS_LAST_ACK;
|
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break;
|
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}
|
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/* soisfdisconnecting(tp->t_socket); */
|
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if (tp && tp->t_state >= TCPS_FIN_WAIT_2)
|
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soisfdisconnected(tp->t_socket);
|
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if (tp)
|
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tcp_output(tp);
|
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}
|
||
|
||
/*
|
||
* Connect to a host on the Internet
|
||
* Called by tcp_input
|
||
* Only do a connect, the tcp fields will be set in tcp_input
|
||
* return 0 if there's a result of the connect,
|
||
* else return -1 means we're still connecting
|
||
* The return value is almost always -1 since the socket is
|
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* nonblocking. Connect returns after the SYN is sent, and does
|
||
* not wait for ACK+SYN.
|
||
*/
|
||
int tcp_fconnect(so)
|
||
struct socket *so;
|
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{
|
||
int ret=0;
|
||
|
||
DEBUG_CALL("tcp_fconnect");
|
||
DEBUG_ARG("so = %lx", (long )so);
|
||
|
||
if( (ret=so->s=socket(AF_INET,SOCK_STREAM,0)) >= 0) {
|
||
int opt, s=so->s;
|
||
struct sockaddr_in addr;
|
||
|
||
fd_nonblock(s);
|
||
opt = 1;
|
||
setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&opt,sizeof(opt ));
|
||
opt = 1;
|
||
setsockopt(s,SOL_SOCKET,SO_OOBINLINE,(char *)&opt,sizeof(opt ));
|
||
|
||
addr.sin_family = AF_INET;
|
||
if ((so->so_faddr.s_addr & htonl(0xffffff00)) == special_addr.s_addr) {
|
||
/* It's an alias */
|
||
switch(ntohl(so->so_faddr.s_addr) & 0xff) {
|
||
case CTL_DNS:
|
||
addr.sin_addr = dns_addr;
|
||
break;
|
||
case CTL_ALIAS:
|
||
default:
|
||
addr.sin_addr = loopback_addr;
|
||
break;
|
||
}
|
||
} else
|
||
addr.sin_addr = so->so_faddr;
|
||
addr.sin_port = so->so_fport;
|
||
|
||
DEBUG_MISC((dfd, " connect()ing, addr.sin_port=%d, "
|
||
"addr.sin_addr.s_addr=%.16s\n",
|
||
ntohs(addr.sin_port), inet_ntoa(addr.sin_addr)));
|
||
/* We don't care what port we get */
|
||
ret = connect(s,(struct sockaddr *)&addr,sizeof (addr));
|
||
|
||
/*
|
||
* If it's not in progress, it failed, so we just return 0,
|
||
* without clearing SS_NOFDREF
|
||
*/
|
||
soisfconnecting(so);
|
||
}
|
||
|
||
return(ret);
|
||
}
|
||
|
||
/*
|
||
* Accept the socket and connect to the local-host
|
||
*
|
||
* We have a problem. The correct thing to do would be
|
||
* to first connect to the local-host, and only if the
|
||
* connection is accepted, then do an accept() here.
|
||
* But, a) we need to know who's trying to connect
|
||
* to the socket to be able to SYN the local-host, and
|
||
* b) we are already connected to the foreign host by
|
||
* the time it gets to accept(), so... We simply accept
|
||
* here and SYN the local-host.
|
||
*/
|
||
void
|
||
tcp_connect(inso)
|
||
struct socket *inso;
|
||
{
|
||
struct socket *so;
|
||
struct sockaddr_in addr;
|
||
int addrlen = sizeof(struct sockaddr_in);
|
||
struct tcpcb *tp;
|
||
int s, opt;
|
||
|
||
DEBUG_CALL("tcp_connect");
|
||
DEBUG_ARG("inso = %lx", (long)inso);
|
||
|
||
/*
|
||
* If it's an SS_ACCEPTONCE socket, no need to socreate()
|
||
* another socket, just use the accept() socket.
|
||
*/
|
||
if (inso->so_state & SS_FACCEPTONCE) {
|
||
/* FACCEPTONCE already have a tcpcb */
|
||
so = inso;
|
||
} else {
|
||
if ((so = socreate()) == NULL) {
|
||
/* If it failed, get rid of the pending connection */
|
||
closesocket(accept(inso->s,(struct sockaddr *)&addr,&addrlen));
|
||
return;
|
||
}
|
||
if (tcp_attach(so) < 0) {
|
||
free(so); /* NOT sofree */
|
||
return;
|
||
}
|
||
so->so_laddr = inso->so_laddr;
|
||
so->so_lport = inso->so_lport;
|
||
}
|
||
|
||
(void) tcp_mss(sototcpcb(so), 0);
|
||
|
||
if ((s = accept(inso->s,(struct sockaddr *)&addr,&addrlen)) < 0) {
|
||
tcp_close(sototcpcb(so)); /* This will sofree() as well */
|
||
return;
|
||
}
|
||
fd_nonblock(s);
|
||
opt = 1;
|
||
setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&opt,sizeof(int));
|
||
opt = 1;
|
||
setsockopt(s,SOL_SOCKET,SO_OOBINLINE,(char *)&opt,sizeof(int));
|
||
|
||
so->so_fport = addr.sin_port;
|
||
so->so_faddr = addr.sin_addr;
|
||
/* Translate connections from localhost to the real hostname */
|
||
if (so->so_faddr.s_addr == 0 || so->so_faddr.s_addr == loopback_addr.s_addr)
|
||
so->so_faddr = our_addr;
|
||
|
||
/* Close the accept() socket, set right state */
|
||
if (inso->so_state & SS_FACCEPTONCE) {
|
||
closesocket(so->s); /* If we only accept once, close the accept() socket */
|
||
so->so_state = SS_NOFDREF; /* Don't select it yet, even though we have an FD */
|
||
/* if it's not FACCEPTONCE, it's already NOFDREF */
|
||
}
|
||
so->s = s;
|
||
|
||
so->so_iptos = tcp_tos(so);
|
||
tp = sototcpcb(so);
|
||
|
||
tcp_template(tp);
|
||
|
||
/* 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); */ /* NOFDREF used instead */
|
||
tcpstat.tcps_connattempt++;
|
||
|
||
tp->t_state = TCPS_SYN_SENT;
|
||
tp->t_timer[TCPT_KEEP] = TCPTV_KEEP_INIT;
|
||
tp->iss = tcp_iss;
|
||
tcp_iss += TCP_ISSINCR/2;
|
||
tcp_sendseqinit(tp);
|
||
tcp_output(tp);
|
||
}
|
||
|
||
/*
|
||
* Attach a TCPCB to a socket.
|
||
*/
|
||
int
|
||
tcp_attach(so)
|
||
struct socket *so;
|
||
{
|
||
if ((so->so_tcpcb = tcp_newtcpcb(so)) == NULL)
|
||
return -1;
|
||
|
||
insque(so, &tcb);
|
||
|
||
return 0;
|
||
}
|
||
|
||
/*
|
||
* Set the socket's type of service field
|
||
*/
|
||
struct tos_t tcptos[] = {
|
||
{0, 20, IPTOS_THROUGHPUT, 0}, /* ftp data */
|
||
{21, 21, IPTOS_LOWDELAY, EMU_FTP}, /* ftp control */
|
||
{0, 23, IPTOS_LOWDELAY, 0}, /* telnet */
|
||
{0, 80, IPTOS_THROUGHPUT, 0}, /* WWW */
|
||
{0, 513, IPTOS_LOWDELAY, EMU_RLOGIN|EMU_NOCONNECT}, /* rlogin */
|
||
{0, 514, IPTOS_LOWDELAY, EMU_RSH|EMU_NOCONNECT}, /* shell */
|
||
{0, 544, IPTOS_LOWDELAY, EMU_KSH}, /* kshell */
|
||
{0, 543, IPTOS_LOWDELAY, 0}, /* klogin */
|
||
{0, 6667, IPTOS_THROUGHPUT, EMU_IRC}, /* IRC */
|
||
{0, 6668, IPTOS_THROUGHPUT, EMU_IRC}, /* IRC undernet */
|
||
{0, 7070, IPTOS_LOWDELAY, EMU_REALAUDIO }, /* RealAudio control */
|
||
{0, 113, IPTOS_LOWDELAY, EMU_IDENT }, /* identd protocol */
|
||
{0, 0, 0, 0}
|
||
};
|
||
|
||
struct emu_t *tcpemu = 0;
|
||
|
||
/*
|
||
* Return TOS according to the above table
|
||
*/
|
||
u_int8_t
|
||
tcp_tos(so)
|
||
struct socket *so;
|
||
{
|
||
int i = 0;
|
||
struct emu_t *emup;
|
||
|
||
while(tcptos[i].tos) {
|
||
if ((tcptos[i].fport && (ntohs(so->so_fport) == tcptos[i].fport)) ||
|
||
(tcptos[i].lport && (ntohs(so->so_lport) == tcptos[i].lport))) {
|
||
so->so_emu = tcptos[i].emu;
|
||
return tcptos[i].tos;
|
||
}
|
||
i++;
|
||
}
|
||
|
||
/* Nope, lets see if there's a user-added one */
|
||
for (emup = tcpemu; emup; emup = emup->next) {
|
||
if ((emup->fport && (ntohs(so->so_fport) == emup->fport)) ||
|
||
(emup->lport && (ntohs(so->so_lport) == emup->lport))) {
|
||
so->so_emu = emup->emu;
|
||
return emup->tos;
|
||
}
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
int do_echo = -1;
|
||
|
||
/*
|
||
* Emulate programs that try and connect to us
|
||
* This includes ftp (the data connection is
|
||
* initiated by the server) and IRC (DCC CHAT and
|
||
* DCC SEND) for now
|
||
*
|
||
* NOTE: It's possible to crash SLiRP by sending it
|
||
* unstandard strings to emulate... if this is a problem,
|
||
* more checks are needed here
|
||
*
|
||
* XXX Assumes the whole command came in one packet
|
||
*
|
||
* XXX Some ftp clients will have their TOS set to
|
||
* LOWDELAY and so Nagel will kick in. Because of this,
|
||
* we'll get the first letter, followed by the rest, so
|
||
* we simply scan for ORT instead of PORT...
|
||
* DCC doesn't have this problem because there's other stuff
|
||
* in the packet before the DCC command.
|
||
*
|
||
* Return 1 if the mbuf m is still valid and should be
|
||
* sbappend()ed
|
||
*
|
||
* NOTE: if you return 0 you MUST m_free() the mbuf!
|
||
*/
|
||
int
|
||
tcp_emu(so, m)
|
||
struct socket *so;
|
||
struct mbuf *m;
|
||
{
|
||
u_int n1, n2, n3, n4, n5, n6;
|
||
char buff[256];
|
||
u_int32_t laddr;
|
||
u_int lport;
|
||
char *bptr;
|
||
|
||
DEBUG_CALL("tcp_emu");
|
||
DEBUG_ARG("so = %lx", (long)so);
|
||
DEBUG_ARG("m = %lx", (long)m);
|
||
|
||
switch(so->so_emu) {
|
||
int x, i;
|
||
|
||
case EMU_IDENT:
|
||
/*
|
||
* Identification protocol as per rfc-1413
|
||
*/
|
||
|
||
{
|
||
struct socket *tmpso;
|
||
struct sockaddr_in addr;
|
||
int addrlen = sizeof(struct sockaddr_in);
|
||
struct sbuf *so_rcv = &so->so_rcv;
|
||
|
||
memcpy(so_rcv->sb_wptr, m->m_data, m->m_len);
|
||
so_rcv->sb_wptr += m->m_len;
|
||
so_rcv->sb_rptr += m->m_len;
|
||
m->m_data[m->m_len] = 0; /* NULL terminate */
|
||
if (strchr(m->m_data, '\r') || strchr(m->m_data, '\n')) {
|
||
if (sscanf(so_rcv->sb_data, "%d%*[ ,]%d", &n1, &n2) == 2) {
|
||
HTONS(n1);
|
||
HTONS(n2);
|
||
/* n2 is the one on our host */
|
||
for (tmpso = tcb.so_next; tmpso != &tcb; tmpso = tmpso->so_next) {
|
||
if (tmpso->so_laddr.s_addr == so->so_laddr.s_addr &&
|
||
tmpso->so_lport == n2 &&
|
||
tmpso->so_faddr.s_addr == so->so_faddr.s_addr &&
|
||
tmpso->so_fport == n1) {
|
||
if (getsockname(tmpso->s,
|
||
(struct sockaddr *)&addr, &addrlen) == 0)
|
||
n2 = ntohs(addr.sin_port);
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
so_rcv->sb_cc = sprintf(so_rcv->sb_data, "%d,%d\r\n", n1, n2);
|
||
so_rcv->sb_rptr = so_rcv->sb_data;
|
||
so_rcv->sb_wptr = so_rcv->sb_data + so_rcv->sb_cc;
|
||
}
|
||
m_free(m);
|
||
return 0;
|
||
}
|
||
|
||
#if 0
|
||
case EMU_RLOGIN:
|
||
/*
|
||
* Rlogin emulation
|
||
* First we accumulate all the initial option negotiation,
|
||
* then fork_exec() rlogin according to the options
|
||
*/
|
||
{
|
||
int i, i2, n;
|
||
char *ptr;
|
||
char args[100];
|
||
char term[100];
|
||
struct sbuf *so_snd = &so->so_snd;
|
||
struct sbuf *so_rcv = &so->so_rcv;
|
||
|
||
/* First check if they have a priveladged port, or too much data has arrived */
|
||
if (ntohs(so->so_lport) > 1023 || ntohs(so->so_lport) < 512 ||
|
||
(m->m_len + so_rcv->sb_wptr) > (so_rcv->sb_data + so_rcv->sb_datalen)) {
|
||
memcpy(so_snd->sb_wptr, "Permission denied\n", 18);
|
||
so_snd->sb_wptr += 18;
|
||
so_snd->sb_cc += 18;
|
||
tcp_sockclosed(sototcpcb(so));
|
||
m_free(m);
|
||
return 0;
|
||
}
|
||
|
||
/* Append the current data */
|
||
memcpy(so_rcv->sb_wptr, m->m_data, m->m_len);
|
||
so_rcv->sb_wptr += m->m_len;
|
||
so_rcv->sb_rptr += m->m_len;
|
||
m_free(m);
|
||
|
||
/*
|
||
* Check if we have all the initial options,
|
||
* and build argument list to rlogin while we're here
|
||
*/
|
||
n = 0;
|
||
ptr = so_rcv->sb_data;
|
||
args[0] = 0;
|
||
term[0] = 0;
|
||
while (ptr < so_rcv->sb_wptr) {
|
||
if (*ptr++ == 0) {
|
||
n++;
|
||
if (n == 2) {
|
||
sprintf(args, "rlogin -l %s %s",
|
||
ptr, inet_ntoa(so->so_faddr));
|
||
} else if (n == 3) {
|
||
i2 = so_rcv->sb_wptr - ptr;
|
||
for (i = 0; i < i2; i++) {
|
||
if (ptr[i] == '/') {
|
||
ptr[i] = 0;
|
||
#ifdef HAVE_SETENV
|
||
sprintf(term, "%s", ptr);
|
||
#else
|
||
sprintf(term, "TERM=%s", ptr);
|
||
#endif
|
||
ptr[i] = '/';
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
if (n != 4)
|
||
return 0;
|
||
|
||
/* We have it, set our term variable and fork_exec() */
|
||
#ifdef HAVE_SETENV
|
||
setenv("TERM", term, 1);
|
||
#else
|
||
putenv(term);
|
||
#endif
|
||
fork_exec(so, args, 2);
|
||
term[0] = 0;
|
||
so->so_emu = 0;
|
||
|
||
/* And finally, send the client a 0 character */
|
||
so_snd->sb_wptr[0] = 0;
|
||
so_snd->sb_wptr++;
|
||
so_snd->sb_cc++;
|
||
|
||
return 0;
|
||
}
|
||
|
||
case EMU_RSH:
|
||
/*
|
||
* rsh emulation
|
||
* First we accumulate all the initial option negotiation,
|
||
* then rsh_exec() rsh according to the options
|
||
*/
|
||
{
|
||
int n;
|
||
char *ptr;
|
||
char *user;
|
||
char *args;
|
||
struct sbuf *so_snd = &so->so_snd;
|
||
struct sbuf *so_rcv = &so->so_rcv;
|
||
|
||
/* First check if they have a priveladged port, or too much data has arrived */
|
||
if (ntohs(so->so_lport) > 1023 || ntohs(so->so_lport) < 512 ||
|
||
(m->m_len + so_rcv->sb_wptr) > (so_rcv->sb_data + so_rcv->sb_datalen)) {
|
||
memcpy(so_snd->sb_wptr, "Permission denied\n", 18);
|
||
so_snd->sb_wptr += 18;
|
||
so_snd->sb_cc += 18;
|
||
tcp_sockclosed(sototcpcb(so));
|
||
m_free(m);
|
||
return 0;
|
||
}
|
||
|
||
/* Append the current data */
|
||
memcpy(so_rcv->sb_wptr, m->m_data, m->m_len);
|
||
so_rcv->sb_wptr += m->m_len;
|
||
so_rcv->sb_rptr += m->m_len;
|
||
m_free(m);
|
||
|
||
/*
|
||
* Check if we have all the initial options,
|
||
* and build argument list to rlogin while we're here
|
||
*/
|
||
n = 0;
|
||
ptr = so_rcv->sb_data;
|
||
user="";
|
||
args="";
|
||
if (so->extra==NULL) {
|
||
struct socket *ns;
|
||
struct tcpcb* tp;
|
||
int port=atoi(ptr);
|
||
if (port <= 0) return 0;
|
||
if (port > 1023 || port < 512) {
|
||
memcpy(so_snd->sb_wptr, "Permission denied\n", 18);
|
||
so_snd->sb_wptr += 18;
|
||
so_snd->sb_cc += 18;
|
||
tcp_sockclosed(sototcpcb(so));
|
||
return 0;
|
||
}
|
||
if ((ns=socreate()) == NULL)
|
||
return 0;
|
||
if (tcp_attach(ns)<0) {
|
||
free(ns);
|
||
return 0;
|
||
}
|
||
|
||
ns->so_laddr=so->so_laddr;
|
||
ns->so_lport=htons(port);
|
||
|
||
(void) tcp_mss(sototcpcb(ns), 0);
|
||
|
||
ns->so_faddr=so->so_faddr;
|
||
ns->so_fport=htons(IPPORT_RESERVED-1); /* Use a fake port. */
|
||
|
||
if (ns->so_faddr.s_addr == 0 ||
|
||
ns->so_faddr.s_addr == loopback_addr.s_addr)
|
||
ns->so_faddr = our_addr;
|
||
|
||
ns->so_iptos = tcp_tos(ns);
|
||
tp = sototcpcb(ns);
|
||
|
||
tcp_template(tp);
|
||
|
||
/* 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++;
|
||
*/
|
||
|
||
/*soisfconnecting(ns);*/
|
||
|
||
tcpstat.tcps_connattempt++;
|
||
|
||
tp->t_state = TCPS_SYN_SENT;
|
||
tp->t_timer[TCPT_KEEP] = TCPTV_KEEP_INIT;
|
||
tp->iss = tcp_iss;
|
||
tcp_iss += TCP_ISSINCR/2;
|
||
tcp_sendseqinit(tp);
|
||
tcp_output(tp);
|
||
so->extra=ns;
|
||
}
|
||
while (ptr < so_rcv->sb_wptr) {
|
||
if (*ptr++ == 0) {
|
||
n++;
|
||
if (n == 2) {
|
||
user=ptr;
|
||
} else if (n == 3) {
|
||
args=ptr;
|
||
}
|
||
}
|
||
}
|
||
|
||
if (n != 4)
|
||
return 0;
|
||
|
||
rsh_exec(so,so->extra, user, inet_ntoa(so->so_faddr), args);
|
||
so->so_emu = 0;
|
||
so->extra=NULL;
|
||
|
||
/* And finally, send the client a 0 character */
|
||
so_snd->sb_wptr[0] = 0;
|
||
so_snd->sb_wptr++;
|
||
so_snd->sb_cc++;
|
||
|
||
return 0;
|
||
}
|
||
|
||
case EMU_CTL:
|
||
{
|
||
int num;
|
||
struct sbuf *so_snd = &so->so_snd;
|
||
struct sbuf *so_rcv = &so->so_rcv;
|
||
|
||
/*
|
||
* If there is binary data here, we save it in so->so_m
|
||
*/
|
||
if (!so->so_m) {
|
||
int rxlen;
|
||
char *rxdata;
|
||
rxdata=mtod(m, char *);
|
||
for (rxlen=m->m_len; rxlen; rxlen--) {
|
||
if (*rxdata++ & 0x80) {
|
||
so->so_m = m;
|
||
return 0;
|
||
}
|
||
}
|
||
} /* if(so->so_m==NULL) */
|
||
|
||
/*
|
||
* Append the line
|
||
*/
|
||
sbappendsb(so_rcv, m);
|
||
|
||
/* To avoid going over the edge of the buffer, we reset it */
|
||
if (so_snd->sb_cc == 0)
|
||
so_snd->sb_wptr = so_snd->sb_rptr = so_snd->sb_data;
|
||
|
||
/*
|
||
* A bit of a hack:
|
||
* If the first packet we get here is 1 byte long, then it
|
||
* was done in telnet character mode, therefore we must echo
|
||
* the characters as they come. Otherwise, we echo nothing,
|
||
* because in linemode, the line is already echoed
|
||
* XXX two or more control connections won't work
|
||
*/
|
||
if (do_echo == -1) {
|
||
if (m->m_len == 1) do_echo = 1;
|
||
else do_echo = 0;
|
||
}
|
||
if (do_echo) {
|
||
sbappendsb(so_snd, m);
|
||
m_free(m);
|
||
tcp_output(sototcpcb(so)); /* XXX */
|
||
} else
|
||
m_free(m);
|
||
|
||
num = 0;
|
||
while (num < so->so_rcv.sb_cc) {
|
||
if (*(so->so_rcv.sb_rptr + num) == '\n' ||
|
||
*(so->so_rcv.sb_rptr + num) == '\r') {
|
||
int n;
|
||
|
||
*(so_rcv->sb_rptr + num) = 0;
|
||
if (ctl_password && !ctl_password_ok) {
|
||
/* Need a password */
|
||
if (sscanf(so_rcv->sb_rptr, "pass %256s", buff) == 1) {
|
||
if (strcmp(buff, ctl_password) == 0) {
|
||
ctl_password_ok = 1;
|
||
n = sprintf(so_snd->sb_wptr,
|
||
"Password OK.\r\n");
|
||
goto do_prompt;
|
||
}
|
||
}
|
||
n = sprintf(so_snd->sb_wptr,
|
||
"Error: Password required, log on with \"pass PASSWORD\"\r\n");
|
||
goto do_prompt;
|
||
}
|
||
cfg_quitting = 0;
|
||
n = do_config(so_rcv->sb_rptr, so, PRN_SPRINTF);
|
||
if (!cfg_quitting) {
|
||
/* Register the printed data */
|
||
do_prompt:
|
||
so_snd->sb_cc += n;
|
||
so_snd->sb_wptr += n;
|
||
/* Add prompt */
|
||
n = sprintf(so_snd->sb_wptr, "Slirp> ");
|
||
so_snd->sb_cc += n;
|
||
so_snd->sb_wptr += n;
|
||
}
|
||
/* Drop so_rcv data */
|
||
so_rcv->sb_cc = 0;
|
||
so_rcv->sb_wptr = so_rcv->sb_rptr = so_rcv->sb_data;
|
||
tcp_output(sototcpcb(so)); /* Send the reply */
|
||
}
|
||
num++;
|
||
}
|
||
return 0;
|
||
}
|
||
#endif
|
||
case EMU_FTP: /* ftp */
|
||
*(m->m_data+m->m_len) = 0; /* NULL terminate for strstr */
|
||
if ((bptr = (char *)strstr(m->m_data, "ORT")) != NULL) {
|
||
/*
|
||
* Need to emulate the PORT command
|
||
*/
|
||
x = sscanf(bptr, "ORT %d,%d,%d,%d,%d,%d\r\n%256[^\177]",
|
||
&n1, &n2, &n3, &n4, &n5, &n6, buff);
|
||
if (x < 6)
|
||
return 1;
|
||
|
||
laddr = htonl((n1 << 24) | (n2 << 16) | (n3 << 8) | (n4));
|
||
lport = htons((n5 << 8) | (n6));
|
||
|
||
if ((so = solisten(0, laddr, lport, SS_FACCEPTONCE)) == NULL)
|
||
return 1;
|
||
|
||
n6 = ntohs(so->so_fport);
|
||
|
||
n5 = (n6 >> 8) & 0xff;
|
||
n6 &= 0xff;
|
||
|
||
laddr = ntohl(so->so_faddr.s_addr);
|
||
|
||
n1 = ((laddr >> 24) & 0xff);
|
||
n2 = ((laddr >> 16) & 0xff);
|
||
n3 = ((laddr >> 8) & 0xff);
|
||
n4 = (laddr & 0xff);
|
||
|
||
m->m_len = bptr - m->m_data; /* Adjust length */
|
||
m->m_len += sprintf(bptr,"ORT %d,%d,%d,%d,%d,%d\r\n%s",
|
||
n1, n2, n3, n4, n5, n6, x==7?buff:"");
|
||
return 1;
|
||
} else if ((bptr = (char *)strstr(m->m_data, "27 Entering")) != NULL) {
|
||
/*
|
||
* Need to emulate the PASV response
|
||
*/
|
||
x = sscanf(bptr, "27 Entering Passive Mode (%d,%d,%d,%d,%d,%d)\r\n%256[^\177]",
|
||
&n1, &n2, &n3, &n4, &n5, &n6, buff);
|
||
if (x < 6)
|
||
return 1;
|
||
|
||
laddr = htonl((n1 << 24) | (n2 << 16) | (n3 << 8) | (n4));
|
||
lport = htons((n5 << 8) | (n6));
|
||
|
||
if ((so = solisten(0, laddr, lport, SS_FACCEPTONCE)) == NULL)
|
||
return 1;
|
||
|
||
n6 = ntohs(so->so_fport);
|
||
|
||
n5 = (n6 >> 8) & 0xff;
|
||
n6 &= 0xff;
|
||
|
||
laddr = ntohl(so->so_faddr.s_addr);
|
||
|
||
n1 = ((laddr >> 24) & 0xff);
|
||
n2 = ((laddr >> 16) & 0xff);
|
||
n3 = ((laddr >> 8) & 0xff);
|
||
n4 = (laddr & 0xff);
|
||
|
||
m->m_len = bptr - m->m_data; /* Adjust length */
|
||
m->m_len += sprintf(bptr,"27 Entering Passive Mode (%d,%d,%d,%d,%d,%d)\r\n%s",
|
||
n1, n2, n3, n4, n5, n6, x==7?buff:"");
|
||
|
||
return 1;
|
||
}
|
||
|
||
return 1;
|
||
|
||
case EMU_KSH:
|
||
/*
|
||
* The kshell (Kerberos rsh) and shell services both pass
|
||
* a local port port number to carry signals to the server
|
||
* and stderr to the client. It is passed at the beginning
|
||
* of the connection as a NUL-terminated decimal ASCII string.
|
||
*/
|
||
so->so_emu = 0;
|
||
for (lport = 0, i = 0; i < m->m_len-1; ++i) {
|
||
if (m->m_data[i] < '0' || m->m_data[i] > '9')
|
||
return 1; /* invalid number */
|
||
lport *= 10;
|
||
lport += m->m_data[i] - '0';
|
||
}
|
||
if (m->m_data[m->m_len-1] == '\0' && lport != 0 &&
|
||
(so = solisten(0, so->so_laddr.s_addr, htons(lport), SS_FACCEPTONCE)) != NULL)
|
||
m->m_len = sprintf(m->m_data, "%d", ntohs(so->so_fport))+1;
|
||
return 1;
|
||
|
||
case EMU_IRC:
|
||
/*
|
||
* Need to emulate DCC CHAT, DCC SEND and DCC MOVE
|
||
*/
|
||
*(m->m_data+m->m_len) = 0; /* NULL terminate the string for strstr */
|
||
if ((bptr = (char *)strstr(m->m_data, "DCC")) == NULL)
|
||
return 1;
|
||
|
||
/* The %256s is for the broken mIRC */
|
||
if (sscanf(bptr, "DCC CHAT %256s %u %u", buff, &laddr, &lport) == 3) {
|
||
if ((so = solisten(0, htonl(laddr), htons(lport), SS_FACCEPTONCE)) == NULL)
|
||
return 1;
|
||
|
||
m->m_len = bptr - m->m_data; /* Adjust length */
|
||
m->m_len += sprintf(bptr, "DCC CHAT chat %lu %u%c\n",
|
||
(unsigned long)ntohl(so->so_faddr.s_addr),
|
||
ntohs(so->so_fport), 1);
|
||
} else if (sscanf(bptr, "DCC SEND %256s %u %u %u", buff, &laddr, &lport, &n1) == 4) {
|
||
if ((so = solisten(0, htonl(laddr), htons(lport), SS_FACCEPTONCE)) == NULL)
|
||
return 1;
|
||
|
||
m->m_len = bptr - m->m_data; /* Adjust length */
|
||
m->m_len += sprintf(bptr, "DCC SEND %s %lu %u %u%c\n",
|
||
buff, (unsigned long)ntohl(so->so_faddr.s_addr),
|
||
ntohs(so->so_fport), n1, 1);
|
||
} else if (sscanf(bptr, "DCC MOVE %256s %u %u %u", buff, &laddr, &lport, &n1) == 4) {
|
||
if ((so = solisten(0, htonl(laddr), htons(lport), SS_FACCEPTONCE)) == NULL)
|
||
return 1;
|
||
|
||
m->m_len = bptr - m->m_data; /* Adjust length */
|
||
m->m_len += sprintf(bptr, "DCC MOVE %s %lu %u %u%c\n",
|
||
buff, (unsigned long)ntohl(so->so_faddr.s_addr),
|
||
ntohs(so->so_fport), n1, 1);
|
||
}
|
||
return 1;
|
||
|
||
case EMU_REALAUDIO:
|
||
/*
|
||
* RealAudio emulation - JP. We must try to parse the incoming
|
||
* data and try to find the two characters that contain the
|
||
* port number. Then we redirect an udp port and replace the
|
||
* number with the real port we got.
|
||
*
|
||
* The 1.0 beta versions of the player are not supported
|
||
* any more.
|
||
*
|
||
* A typical packet for player version 1.0 (release version):
|
||
*
|
||
* 0000:50 4E 41 00 05
|
||
* 0000:00 01 00 02 1B D7 00 00 67 E6 6C DC 63 00 12 50 .....<2E>..g<>l<EFBFBD>c..P
|
||
* 0010:4E 43 4C 49 45 4E 54 20 31 30 31 20 41 4C 50 48 NCLIENT 101 ALPH
|
||
* 0020:41 6C 00 00 52 00 17 72 61 66 69 6C 65 73 2F 76 Al..R..rafiles/v
|
||
* 0030:6F 61 2F 65 6E 67 6C 69 73 68 5F 2E 72 61 79 42 oa/english_.rayB
|
||
*
|
||
* Now the port number 0x1BD7 is found at offset 0x04 of the
|
||
* Now the port number 0x1BD7 is found at offset 0x04 of the
|
||
* second packet. This time we received five bytes first and
|
||
* then the rest. You never know how many bytes you get.
|
||
*
|
||
* A typical packet for player version 2.0 (beta):
|
||
*
|
||
* 0000:50 4E 41 00 06 00 02 00 00 00 01 00 02 1B C1 00 PNA...........<2E>.
|
||
* 0010:00 67 75 78 F5 63 00 0A 57 69 6E 32 2E 30 2E 30 .gux<75>c..Win2.0.0
|
||
* 0020:2E 35 6C 00 00 52 00 1C 72 61 66 69 6C 65 73 2F .5l..R..rafiles/
|
||
* 0030:77 65 62 73 69 74 65 2F 32 30 72 65 6C 65 61 73 website/20releas
|
||
* 0040:65 2E 72 61 79 53 00 00 06 36 42 e.rayS...6B
|
||
*
|
||
* Port number 0x1BC1 is found at offset 0x0d.
|
||
*
|
||
* This is just a horrible switch statement. Variable ra tells
|
||
* us where we're going.
|
||
*/
|
||
|
||
bptr = m->m_data;
|
||
while (bptr < m->m_data + m->m_len) {
|
||
u_short p;
|
||
static int ra = 0;
|
||
char ra_tbl[4];
|
||
|
||
ra_tbl[0] = 0x50;
|
||
ra_tbl[1] = 0x4e;
|
||
ra_tbl[2] = 0x41;
|
||
ra_tbl[3] = 0;
|
||
|
||
switch (ra) {
|
||
case 0:
|
||
case 2:
|
||
case 3:
|
||
if (*bptr++ != ra_tbl[ra]) {
|
||
ra = 0;
|
||
continue;
|
||
}
|
||
break;
|
||
|
||
case 1:
|
||
/*
|
||
* We may get 0x50 several times, ignore them
|
||
*/
|
||
if (*bptr == 0x50) {
|
||
ra = 1;
|
||
bptr++;
|
||
continue;
|
||
} else if (*bptr++ != ra_tbl[ra]) {
|
||
ra = 0;
|
||
continue;
|
||
}
|
||
break;
|
||
|
||
case 4:
|
||
/*
|
||
* skip version number
|
||
*/
|
||
bptr++;
|
||
break;
|
||
|
||
case 5:
|
||
/*
|
||
* The difference between versions 1.0 and
|
||
* 2.0 is here. For future versions of
|
||
* the player this may need to be modified.
|
||
*/
|
||
if (*(bptr + 1) == 0x02)
|
||
bptr += 8;
|
||
else
|
||
bptr += 4;
|
||
break;
|
||
|
||
case 6:
|
||
/* This is the field containing the port
|
||
* number that RA-player is listening to.
|
||
*/
|
||
lport = (((u_char*)bptr)[0] << 8)
|
||
+ ((u_char *)bptr)[1];
|
||
if (lport < 6970)
|
||
lport += 256; /* don't know why */
|
||
if (lport < 6970 || lport > 7170)
|
||
return 1; /* failed */
|
||
|
||
/* try to get udp port between 6970 - 7170 */
|
||
for (p = 6970; p < 7071; p++) {
|
||
if (udp_listen( htons(p),
|
||
so->so_laddr.s_addr,
|
||
htons(lport),
|
||
SS_FACCEPTONCE)) {
|
||
break;
|
||
}
|
||
}
|
||
if (p == 7071)
|
||
p = 0;
|
||
*(u_char *)bptr++ = (p >> 8) & 0xff;
|
||
*(u_char *)bptr++ = p & 0xff;
|
||
ra = 0;
|
||
return 1; /* port redirected, we're done */
|
||
break;
|
||
|
||
default:
|
||
ra = 0;
|
||
}
|
||
ra++;
|
||
}
|
||
return 1;
|
||
|
||
default:
|
||
/* Ooops, not emulated, won't call tcp_emu again */
|
||
so->so_emu = 0;
|
||
return 1;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Do misc. config of SLiRP while its running.
|
||
* Return 0 if this connections is to be closed, 1 otherwise,
|
||
* return 2 if this is a command-line connection
|
||
*/
|
||
int
|
||
tcp_ctl(so)
|
||
struct socket *so;
|
||
{
|
||
struct sbuf *sb = &so->so_snd;
|
||
int command;
|
||
struct ex_list *ex_ptr;
|
||
int do_pty;
|
||
// struct socket *tmpso;
|
||
|
||
DEBUG_CALL("tcp_ctl");
|
||
DEBUG_ARG("so = %lx", (long )so);
|
||
|
||
#if 0
|
||
/*
|
||
* Check if they're authorised
|
||
*/
|
||
if (ctl_addr.s_addr && (ctl_addr.s_addr == -1 || (so->so_laddr.s_addr != ctl_addr.s_addr))) {
|
||
sb->sb_cc = sprintf(sb->sb_wptr,"Error: Permission denied.\r\n");
|
||
sb->sb_wptr += sb->sb_cc;
|
||
return 0;
|
||
}
|
||
#endif
|
||
command = (ntohl(so->so_faddr.s_addr) & 0xff);
|
||
|
||
switch(command) {
|
||
default: /* Check for exec's */
|
||
|
||
/*
|
||
* Check if it's pty_exec
|
||
*/
|
||
for (ex_ptr = exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next) {
|
||
if (ex_ptr->ex_fport == so->so_fport &&
|
||
command == ex_ptr->ex_addr) {
|
||
do_pty = ex_ptr->ex_pty;
|
||
goto do_exec;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Nothing bound..
|
||
*/
|
||
/* tcp_fconnect(so); */
|
||
|
||
/* FALLTHROUGH */
|
||
case CTL_ALIAS:
|
||
sb->sb_cc = sprintf(sb->sb_wptr,
|
||
"Error: No application configured.\r\n");
|
||
sb->sb_wptr += sb->sb_cc;
|
||
return(0);
|
||
|
||
do_exec:
|
||
DEBUG_MISC((dfd, " executing %s \n",ex_ptr->ex_exec));
|
||
return(fork_exec(so, ex_ptr->ex_exec, do_pty));
|
||
|
||
#if 0
|
||
case CTL_CMD:
|
||
for (tmpso = tcb.so_next; tmpso != &tcb; tmpso = tmpso->so_next) {
|
||
if (tmpso->so_emu == EMU_CTL &&
|
||
!(tmpso->so_tcpcb?
|
||
(tmpso->so_tcpcb->t_state & (TCPS_TIME_WAIT|TCPS_LAST_ACK))
|
||
:0)) {
|
||
/* Ooops, control connection already active */
|
||
sb->sb_cc = sprintf(sb->sb_wptr,"Sorry, already connected.\r\n");
|
||
sb->sb_wptr += sb->sb_cc;
|
||
return 0;
|
||
}
|
||
}
|
||
so->so_emu = EMU_CTL;
|
||
ctl_password_ok = 0;
|
||
sb->sb_cc = sprintf(sb->sb_wptr, "Slirp command-line ready (type \"help\" for help).\r\nSlirp> ");
|
||
sb->sb_wptr += sb->sb_cc;
|
||
do_echo=-1;
|
||
return(2);
|
||
#endif
|
||
}
|
||
}
|