diff options
Diffstat (limited to 'slirp/tcp_subr.c')
| -rw-r--r-- | slirp/tcp_subr.c | 680 |
1 files changed, 181 insertions, 499 deletions
diff --git a/slirp/tcp_subr.c b/slirp/tcp_subr.c index e66987e..b42e6ea 100644 --- a/slirp/tcp_subr.c +++ b/slirp/tcp_subr.c @@ -37,13 +37,16 @@ /* * Changes and additions relating to SLiRP * Copyright (c) 1995 Danny Gasparovski. - * - * Please read the file COPYRIGHT for the + * + * Please read the file COPYRIGHT for the * terms and conditions of the copyright. */ #define WANT_SYS_IOCTL_H #include <slirp.h> +#define SLIRP_COMPILATION +#include "sockets.h" +#include "proxy_common.h" /* patchable/settable parameters for tcp */ int tcp_mssdflt = TCP_MSS; @@ -60,11 +63,11 @@ tcp_init() { tcp_iss = 1; /* wrong */ tcb.so_next = tcb.so_prev = &tcb; - + /* tcp_rcvspace = our Window we advertise to the remote */ tcp_rcvspace = TCP_RCVSPACE; tcp_sndspace = TCP_SNDSPACE; - + /* Make sure tcp_sndspace is at least 2*MSS */ if (tcp_sndspace < 2*(min(if_mtu, if_mru) - sizeof(struct tcpiphdr))) tcp_sndspace = 2*(min(if_mtu, if_mru) - sizeof(struct tcpiphdr)); @@ -92,7 +95,7 @@ tcp_template(tp) n->ti_dst = so->so_laddr; n->ti_sport = so->so_fport; n->ti_dport = so->so_lport; - + n->ti_seq = 0; n->ti_ack = 0; n->ti_x2 = 0; @@ -120,7 +123,7 @@ void tcp_respond(tp, ti, m, ack, seq, flags) struct tcpcb *tp; register struct tcpiphdr *ti; - register struct mbuf *m; + register MBuf m; tcp_seq ack, seq; int flags; { @@ -134,11 +137,11 @@ tcp_respond(tp, ti, m, ack, seq, flags) DEBUG_ARG("ack = %u", ack); DEBUG_ARG("seq = %u", seq); DEBUG_ARG("flags = %x", flags); - + if (tp) - win = sbspace(&tp->t_socket->so_rcv); + win = sbuf_space(&tp->t_socket->so_rcv); if (m == 0) { - if ((m = m_get()) == NULL) + if ((m = mbuf_alloc()) == NULL) return; #ifdef TCP_COMPAT_42 tlen = 1; @@ -146,16 +149,16 @@ tcp_respond(tp, ti, m, ack, seq, flags) tlen = 0; #endif m->m_data += if_maxlinkhdr; - *mtod(m, struct tcpiphdr *) = *ti; - ti = mtod(m, struct tcpiphdr *); + *MBUF_TO(m, struct tcpiphdr *) = *ti; + ti = MBUF_TO(m, struct tcpiphdr *); flags = TH_ACK; } else { - /* + /* * ti points into m so the next line is just making * the mbuf point to ti */ m->m_data = (caddr_t)ti; - + m->m_len = sizeof (struct tcpiphdr); tlen = 0; #define xchg(a,b,type) { type t; t=a; a=b; b=t; } @@ -183,11 +186,11 @@ tcp_respond(tp, ti, m, ack, seq, flags) ti->ti_sum = cksum(m, tlen); ((struct ip *)ti)->ip_len = tlen; - if(flags & TH_RST) + if(flags & TH_RST) ((struct ip *)ti)->ip_ttl = MAXTTL; - else + else ((struct ip *)ti)->ip_ttl = ip_defttl; - + (void) ip_output((struct socket *)0, m); } @@ -201,18 +204,18 @@ tcp_newtcpcb(so) struct socket *so; { register struct tcpcb *tp; - + tp = (struct tcpcb *)malloc(sizeof(*tp)); if (tp == NULL) return ((struct tcpcb *)0); - + memset((char *) tp, 0, sizeof(struct tcpcb)); tp->seg_next = tp->seg_prev = (tcpiphdrp_32)tp; tp->t_maxseg = tcp_mssdflt; - + tp->t_flags = tcp_do_rfc1323 ? (TF_REQ_SCALE|TF_REQ_TSTMP) : 0; tp->t_socket = so; - + /* * Init srtt to TCPTV_SRTTBASE (0), so we can tell that we have no * rtt estimate. Set rttvar so that srtt + 2 * rttvar gives @@ -222,14 +225,14 @@ tcp_newtcpcb(so) tp->t_rttvar = tcp_rttdflt * PR_SLOWHZ << 2; tp->t_rttmin = TCPTV_MIN; - TCPT_RANGESET(tp->t_rxtcur, + TCPT_RANGESET(tp->t_rxtcur, ((TCPTV_SRTTBASE >> 2) + (TCPTV_SRTTDFLT << 2)) >> 1, TCPTV_MIN, TCPTV_REXMTMAX); tp->snd_cwnd = TCP_MAXWIN << TCP_MAX_WINSHIFT; tp->snd_ssthresh = TCP_MAXWIN << TCP_MAX_WINSHIFT; tp->t_state = TCPS_CLOSED; - + so->so_tcpcb = tp; return (tp); @@ -240,7 +243,7 @@ tcp_newtcpcb(so) * the specified error. If connection is synchronized, * then send a RST to peer. */ -struct tcpcb *tcp_drop(struct tcpcb *tp, int err) +struct tcpcb *tcp_drop(struct tcpcb *tp, int err) { /* tcp_drop(tp, errno) register struct tcpcb *tp; @@ -251,7 +254,7 @@ struct tcpcb *tcp_drop(struct tcpcb *tp, int err) DEBUG_CALL("tcp_drop"); DEBUG_ARG("tp = %lx", (long)tp); DEBUG_ARG("errno = %d", errno); - + if (TCPS_HAVERCVDSYN(tp->t_state)) { tp->t_state = TCPS_CLOSED; (void) tcp_output(tp); @@ -277,22 +280,22 @@ tcp_close(tp) { register struct tcpiphdr *t; struct socket *so = tp->t_socket; - register struct mbuf *m; + register MBuf m; DEBUG_CALL("tcp_close"); DEBUG_ARG("tp = %lx", (long )tp); - + /* free the reassembly queue, if any */ t = (struct tcpiphdr *) tp->seg_next; while (t != (struct tcpiphdr *)tp) { t = (struct tcpiphdr *)t->ti_next; - m = (struct mbuf *) REASS_MBUF((struct tcpiphdr *)t->ti_prev); + m = (MBuf ) REASS_MBUF((struct tcpiphdr *)t->ti_prev); remque_32((struct tcpiphdr *) t->ti_prev); - m_freem(m); + mbuf_free(m); } /* It's static */ /* if (tp->t_template) - * (void) m_free(dtom(tp->t_template)); + * (void) mbuf_free(MBUF_FROM(tp->t_template)); */ /* free(tp, M_PCB); */ free(tp); @@ -302,8 +305,8 @@ tcp_close(tp) if (so == tcp_last_so) tcp_last_so = &tcb; closesocket(so->s); - sbfree(&so->so_rcv); - sbfree(&so->so_snd); + sbuf_free(&so->so_rcv); + sbuf_free(&so->so_snd); sofree(so); tcpstat.tcps_closed++; return ((struct tcpcb *)0); @@ -356,7 +359,7 @@ tcp_sockclosed(tp) DEBUG_CALL("tcp_sockclosed"); DEBUG_ARG("tp = %lx", (long)tp); - + switch (tp->t_state) { case TCPS_CLOSED: @@ -382,56 +385,80 @@ tcp_sockclosed(tp) tcp_output(tp); } -/* +static void +tcp_proxy_event( struct socket* so, + ProxyEvent event ) +{ + so->so_state &= ~SS_PROXIFIED; + + if (event == PROXY_EVENT_CONNECTED) { + so->so_state &= ~(SS_ISFCONNECTING); + } + else { + so->so_state = SS_NOFDREF; + } + + /* continue the connect */ + tcp_input(NULL, sizeof(struct ip), so); +} + +/* * 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 - * nonblocking. Connect returns after the SYN is sent, and does + * nonblocking. Connect returns after the SYN is sent, and does * not wait for ACK+SYN. */ int tcp_fconnect(so) struct socket *so; { int ret=0; - + int try_proxy = 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; + int 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 )); - + socket_set_nonblock(s); + socket_set_xreuseaddr(s); + socket_set_oobinline(s); + 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 + int last_byte = ntohl(so->so_faddr.s_addr) & 0xff; + + if (CTL_IS_DNS(last_byte)) + addr.sin_addr = dns_addr[last_byte - CTL_DNS]; + else + addr.sin_addr = loopback_addr; + } else { addr.sin_addr = so->so_faddr; + try_proxy = 1; + } 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))); + "addr.sin_addr.s_addr=%.16s\n", + ntohs(addr.sin_port), inet_ntoa(addr.sin_addr))); + + if (try_proxy) { + if (!proxy_manager_add(s, &addr, so, (ProxyEventFunc) tcp_proxy_event)) { + soisfconnecting(so); + so->so_state |= SS_PROXIFIED; + return 0; + } + } + /* 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 @@ -444,16 +471,16 @@ int tcp_fconnect(so) /* * 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 + * 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; @@ -462,11 +489,11 @@ tcp_connect(inso) struct sockaddr_in addr; int addrlen = sizeof(struct sockaddr_in); struct tcpcb *tp; - int s, opt; + int s; 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. @@ -487,38 +514,37 @@ tcp_connect(inso) 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)); - + socket_set_nonblock(s); + socket_set_xreuseaddr(s); + socket_set_oobinline(s); + socket_set_lowlatency(s); + 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 = alias_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 */ + socket_close(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) @@ -527,10 +553,10 @@ tcp_connect(inso) /* 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; + tp->iss = tcp_iss; tcp_iss += TCP_ISSINCR/2; tcp_sendseqinit(tp); tcp_output(tp); @@ -545,7 +571,7 @@ tcp_attach(so) { if ((so->so_tcpcb = tcp_newtcpcb(so)) == NULL) return -1; - + insque(so, &tcb); return 0; @@ -570,8 +596,7 @@ struct tos_t tcptos[] = { {0, 0, 0, 0} }; -struct emu_t *tcpemu = 0; - + /* * Return TOS according to the above table */ @@ -581,7 +606,7 @@ tcp_tos(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))) { @@ -590,16 +615,7 @@ tcp_tos(so) } 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; } @@ -610,54 +626,54 @@ int do_echo = -1; * 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! + * + * Return 1 if the mbuf m is still valid and should be + * sbuf_append()ed + * + * NOTE: if you return 0 you MUST mbuf_free() the mbuf! */ int tcp_emu(so, m) struct socket *so; - struct mbuf *m; + 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; - + 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; @@ -683,337 +699,41 @@ tcp_emu(so, m) so_rcv->sb_rptr = so_rcv->sb_data; so_rcv->sb_wptr = so_rcv->sb_data + so_rcv->sb_cc; } - m_free(m); + mbuf_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 = alias_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]", + */ + 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", + 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) { @@ -1024,34 +744,34 @@ do_prompt: &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 @@ -1070,7 +790,7 @@ do_prompt: (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 @@ -1078,12 +798,12 @@ do_prompt: *(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), @@ -1091,15 +811,15 @@ do_prompt: } 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", + 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), @@ -1108,7 +828,7 @@ do_prompt: 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 @@ -1116,45 +836,45 @@ do_prompt: * * 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 + * + * 0000:50 4E 41 00 05 * 0000:00 01 00 02 1B D7 00 00 67 E6 6C DC 63 00 12 50 .....×..gælÜc..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...........Á. * 0010:00 67 75 78 F5 63 00 0A 57 69 6E 32 2E 30 2E 30 .guxõc..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]; - + 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: @@ -1164,7 +884,7 @@ do_prompt: continue; } break; - + case 1: /* * We may get 0x50 several times, ignore them @@ -1178,15 +898,15 @@ do_prompt: continue; } break; - - case 4: - /* + + case 4: + /* * skip version number */ bptr++; break; - - case 5: + + case 5: /* * The difference between versions 1.0 and * 2.0 is here. For future versions of @@ -1196,19 +916,19 @@ do_prompt: bptr += 8; else bptr += 4; - break; - + break; + case 6: /* This is the field containing the port * number that RA-player is listening to. */ - lport = (((u_char*)bptr)[0] << 8) + lport = (((u_char*)bptr)[0] << 8) + ((u_char *)bptr)[1]; - if (lport < 6970) + 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), @@ -1222,17 +942,17 @@ do_prompt: p = 0; *(u_char *)bptr++ = (p >> 8) & 0xff; *(u_char *)bptr++ = p & 0xff; - ra = 0; + ra = 0; return 1; /* port redirected, we're done */ - break; - + break; + default: - ra = 0; + ra = 0; } ra++; } - return 1; - + return 1; + default: /* Ooops, not emulated, won't call tcp_emu again */ so->so_emu = 0; @@ -1249,15 +969,15 @@ int tcp_ctl(so) struct socket *so; { - struct sbuf *sb = &so->so_snd; + 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 @@ -1267,58 +987,20 @@ tcp_ctl(so) sb->sb_wptr += sb->sb_cc; return 0; } -#endif +#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; - } - } - + default: /* * 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 } } |