diff options
Diffstat (limited to 'slirp/tcp_subr.c')
-rw-r--r-- | slirp/tcp_subr.c | 366 |
1 files changed, 4 insertions, 362 deletions
diff --git a/slirp/tcp_subr.c b/slirp/tcp_subr.c index 219f1dd..892bd83 100644 --- a/slirp/tcp_subr.c +++ b/slirp/tcp_subr.c @@ -60,7 +60,6 @@ tcp_init(void) * in a skeletal tcp/ip header, minimizing the amount of work * necessary when the connection is used. */ -/* struct tcpiphdr * */ void tcp_template(struct tcpcb *tp) { @@ -119,11 +118,7 @@ tcp_respond(struct tcpcb *tp, struct tcpiphdr *ti, struct mbuf *m, if (m == NULL) { if ((m = m_get()) == NULL) return; -#ifdef TCP_COMPAT_42 - tlen = 1; -#else tlen = 0; -#endif m->m_data += IF_MAXLINKHDR; *mtod(m, struct tcpiphdr *) = *ti; ti = mtod(m, struct tcpiphdr *); @@ -220,12 +215,6 @@ tcp_newtcpcb(struct socket *so) */ struct tcpcb *tcp_drop(struct tcpcb *tp, int err) { -/* tcp_drop(tp, errno) - register struct tcpcb *tp; - int errno; -{ -*/ - DEBUG_CALL("tcp_drop"); DEBUG_ARG("tp = %lx", (long)tp); DEBUG_ARG("errno = %d", errno); @@ -236,10 +225,6 @@ struct tcpcb *tcp_drop(struct tcpcb *tp, int err) STAT(tcpstat.tcps_drops++); } else STAT(tcpstat.tcps_conndrops++); -/* if (errno == ETIMEDOUT && tp->t_softerror) - * errno = tp->t_softerror; - */ -/* so->so_error = errno; */ return (tcp_close(tp)); } @@ -267,14 +252,8 @@ tcp_close(struct tcpcb *tp) remque(tcpiphdr2qlink(tcpiphdr_prev(t))); m_freem(m); } - /* It's static */ -/* if (tp->t_template) - * (void) m_free(dtom(tp->t_template)); - */ -/* free(tp, M_PCB); */ free(tp); so->so_tcpcb = NULL; - soisfdisconnected(so); /* clobber input socket cache if we're closing the cached connection */ if (so == tcp_last_so) tcp_last_so = &tcb; @@ -286,30 +265,6 @@ tcp_close(struct tcpcb *tp) return ((struct tcpcb *)0); } -#ifdef notdef -void -tcp_drain() -{ - /* XXX */ -} - -/* - * When a source quench is received, close congestion window - * to one segment. We will gradually open it again as we proceed. - */ -void -tcp_quench(i, errno) - - int errno; -{ - struct tcpcb *tp = intotcpcb(inp); - - if (tp) - tp->snd_cwnd = tp->t_maxseg; -} - -#endif /* notdef */ - /* * TCP protocol interface to socket abstraction. */ @@ -349,9 +304,6 @@ tcp_sockclosed(struct tcpcb *tp) tp->t_state = TCPS_LAST_ACK; break; } -/* soisfdisconnecting(tp->t_socket); */ - if (tp && tp->t_state >= TCPS_FIN_WAIT_2) - soisfdisconnected(tp->t_socket); if (tp) tcp_output(tp); } @@ -490,13 +442,6 @@ tcp_connect(struct socket *inso) 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 */ STAT(tcpstat.tcps_connattempt++); tp->t_state = TCPS_SYN_SENT; @@ -540,10 +485,7 @@ static const struct tos_t tcptos[] = { {0, 0, 0, 0} }; -#ifdef CONFIG_QEMU -static -#endif -struct emu_t *tcpemu = NULL; +static struct emu_t *tcpemu = NULL; /* * Return TOS according to the above table @@ -575,10 +517,6 @@ tcp_tos(struct socket *so) return 0; } -#if 0 -int do_echo = -1; -#endif - /* * Emulate programs that try and connect to us * This includes ftp (the data connection is @@ -661,302 +599,6 @@ tcp_emu(struct socket *so, struct mbuf *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);*/ - - STAT(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; /* NUL terminate for strstr */ if ((bptr = (char *)strstr(m->m_data, "ORT")) != NULL) { @@ -1100,7 +742,7 @@ do_prompt: * 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 .....×..gælÜc..P + * 0000:00 01 00 02 1B D7 00 00 67 E6 6C DC 63 00 12 50 ........g.l.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 @@ -1112,8 +754,8 @@ do_prompt: * * 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 + * 0000:50 4E 41 00 06 00 02 00 00 00 01 00 02 1B C1 00 PNA............. + * 0010:00 67 75 78 F5 63 00 0A 57 69 6E 32 2E 30 2E 30 .gux.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 |