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Diffstat (limited to 'src/teln.c')
| -rw-r--r-- | src/teln.c | 564 |
1 files changed, 0 insertions, 564 deletions
diff --git a/src/teln.c b/src/teln.c deleted file mode 100644 index 6fa910b..0000000 --- a/src/teln.c +++ /dev/null @@ -1,564 +0,0 @@ -/* Copyright (c) 1993-2002 - * Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de) - * Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de) - * Copyright (c) 1987 Oliver Laumann - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program (see the file COPYING); if not, write to the - * Free Software Foundation, Inc., - * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA - * - **************************************************************** - */ - -#include <sys/types.h> -#include <sys/socket.h> -#include <fcntl.h> -#include <netdb.h> - -#include "config.h" - -#ifdef BUILTIN_TELNET - -#include "screen.h" -#include "extern.h" - -extern struct win *fore; -extern struct layer *flayer; -extern int visual_bell; -extern char screenterm[]; - -static void TelReply __P((struct win *, char *, int)); -static void TelDocmd __P((struct win *, int, int)); -static void TelDosub __P((struct win *)); - -#define TEL_DEFPORT 23 -#define TEL_CONNECTING (-2) - -#define TC_IAC 255 -#define TC_DONT 254 -#define TC_DO 253 -#define TC_WONT 252 -#define TC_WILL 251 -#define TC_SB 250 -#define TC_BREAK 243 -#define TC_SE 240 - -#define TC_S "S b swWdDc" - -#define TO_BINARY 0 -#define TO_ECHO 1 -#define TO_SGA 3 -#define TO_TM 6 -#define TO_TTYPE 24 -#define TO_NAWS 31 -#define TO_TSPEED 32 -#define TO_LFLOW 33 -#define TO_XDISPLOC 35 -#define TO_NEWENV 39 - -#define TO_S "be c t wsf xE E" - - -static unsigned char tn_init[] = { - TC_IAC, TC_DO, TO_SGA, - TC_IAC, TC_WILL, TO_TTYPE, - TC_IAC, TC_WILL, TO_NAWS, - TC_IAC, TC_WILL, TO_LFLOW, -}; - -static void -tel_connev_fn(ev, data) -struct event *ev; -char *data; -{ - struct win *p = (struct win *)data; - if (connect(p->w_ptyfd, (struct sockaddr *)&p->w_telsa, sizeof(p->w_telsa)) && errno != EISCONN) - { - char buf[1024]; - buf[0] = ' '; - strncpy(buf + 1, strerror(errno), sizeof(buf) - 2); - buf[sizeof(buf) - 1] = 0; - WriteString(p, buf, strlen(buf)); - WindowDied(p); - return; - } - WriteString(p, "connected.\r\n", 12); - evdeq(&p->w_telconnev); - p->w_telstate = 0; -} - -int -TelOpen(args) -char **args; -{ - int fd; - int on = 1; - - if ((fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1) - { - Msg(errno, "TelOpen: socket"); - return -1; - } - if (setsockopt(fd, SOL_SOCKET, SO_OOBINLINE, (char *)&on, sizeof(on))) - Msg(errno, "TelOpen: setsockopt SO_OOBINLINE"); - return fd; -} - -int -TelConnect(p) -struct win *p; -{ - int port = TEL_DEFPORT; - struct hostent *hp; - char **args; - char buf[256]; - - args = p->w_cmdargs + 1; - - if (!*args) - { - Msg(0, "Usage: screen //telnet host [port]"); - return -1; - } - if (args[1]) - port = atoi(args[1]); - p->w_telsa.sin_family = AF_INET; - if((p->w_telsa.sin_addr.s_addr = inet_addr(*args)) == -1) - { - if ((hp = gethostbyname(*args)) == NULL) - { - Msg(0, "unknown host: %s", *args); - return -1; - } - if (hp->h_length != sizeof(p->w_telsa.sin_addr.s_addr) || hp->h_addrtype != AF_INET) - { - Msg(0, "Bad address type for %s", hp->h_name); - return -1; - } - bcopy((char *)hp->h_addr,(char *)&p->w_telsa.sin_addr.s_addr, hp->h_length); - p->w_telsa.sin_family = hp->h_addrtype; - } - p->w_telsa.sin_port = htons(port); - if (port != TEL_DEFPORT) - sprintf(buf, "Trying %s %d...", inet_ntoa(p->w_telsa.sin_addr), port); - else - sprintf(buf, "Trying %s...", inet_ntoa(p->w_telsa.sin_addr)); - WriteString(p, buf, strlen(buf)); - if (connect(p->w_ptyfd, (struct sockaddr *)&p->w_telsa, sizeof(p->w_telsa))) - { - if (errno == EINPROGRESS) - { - p->w_telstate = TEL_CONNECTING; - p->w_telconnev.fd = p->w_ptyfd; - p->w_telconnev.handler = tel_connev_fn; - p->w_telconnev.data = (char *)p; - p->w_telconnev.type = EV_WRITE; - p->w_telconnev.pri = 1; - debug("telnet connect in progress...\n"); - evenq(&p->w_telconnev); - } - else - { - Msg(errno, "TelOpen: connect"); - return -1; - } - } - else - WriteString(p, "connected.\r\n", 12); - if (port == TEL_DEFPORT) - TelReply(p, (char *)tn_init, sizeof(tn_init)); - return 0; -} - -int -TelIsline(p) -struct win *p; -{ - return !fore->w_telropts[TO_SGA]; -} - -void -TelProcessLine(bufpp, lenp) -char **bufpp; -int *lenp; -{ - int echo = !fore->w_telropts[TO_ECHO]; - unsigned char c; - char *tb; - int tl; - - char *buf = *bufpp; - int l = *lenp; - while (l--) - { - c = *(unsigned char *)buf++; - if (fore->w_telbufl + 2 >= IOSIZE) - { - WBell(fore, visual_bell); - continue; - } - if (c == '\r') - { - if (echo) - WriteString(fore, "\r\n", 2); - fore->w_telbuf[fore->w_telbufl++] = '\r'; - fore->w_telbuf[fore->w_telbufl++] = '\n'; - tb = fore->w_telbuf; - tl = fore->w_telbufl; - LayProcess(&tb, &tl); - fore->w_telbufl = 0; - continue; - } - if (c == '\b' && fore->w_telbufl > 0) - { - if (echo) - { - WriteString(fore, (char *)&c, 1); - WriteString(fore, " ", 1); - WriteString(fore, (char *)&c, 1); - } - fore->w_telbufl--; - } - if ((c >= 0x20 && c <= 0x7e) || c >= 0xa0) - { - if (echo) - WriteString(fore, (char *)&c, 1); - fore->w_telbuf[fore->w_telbufl++] = c; - } - } - *lenp = 0; -} - -int -DoTelnet(buf, lenp, f) -char *buf; -int *lenp; -int f; -{ - int echo = !fore->w_telropts[TO_ECHO]; - int cmode = fore->w_telropts[TO_SGA]; - int bin = fore->w_telropts[TO_BINARY]; - char *p = buf, *sbuf; - int trunc = 0; - int c; - int l = *lenp; - - sbuf = p; - while (l-- > 0) - { - c = *(unsigned char *)p++; - if (c == TC_IAC || (c == '\r' && (l ==0 || *p != '\n') && cmode && !bin)) - { - if (cmode && echo) - { - WriteString(fore, sbuf, p - sbuf); - sbuf = p; - } - if (f-- <= 0) - { - trunc++; - l--; - } - if (l < 0) - { - p--; /* drop char */ - break; - } - if (l) - bcopy(p, p + 1, l); - if (c == TC_IAC) - *p++ = c; - else if (c == '\r') - *p++ = 0; - else if (c == '\n') - { - p[-1] = '\r'; - *p++ = '\n'; - } - } - } - *lenp = p - buf; - return trunc; -} - -/* modifies data in-place, returns new length */ -int -TelIn(p, buf, len, free) -struct win *p; -char *buf; -int len; -int free; -{ - char *rp, *wp; - int c; - - rp = wp = buf; - while (len-- > 0) - { - c = *(unsigned char *)rp++; - - if (p->w_telstate >= TC_WILL && p->w_telstate <= TC_DONT) - { - TelDocmd(p, p->w_telstate, c); - p->w_telstate = 0; - continue; - } - if (p->w_telstate == TC_SB || p->w_telstate == TC_SE) - { - if (p->w_telstate == TC_SE && c == TC_IAC) - p->w_telsubidx--; - if (p->w_telstate == TC_SE && c == TC_SE) - { - p->w_telsubidx--; - TelDosub(p); - p->w_telstate = 0; - continue; - } - if (p->w_telstate == TC_SB && c == TC_IAC) - p->w_telstate = TC_SE; - else - p->w_telstate = TC_SB; - p->w_telsubbuf[p->w_telsubidx] = c; - if (p->w_telsubidx < sizeof(p->w_telsubbuf) - 1) - p->w_telsubidx++; - continue; - } - if (p->w_telstate == TC_IAC) - { - if ((c >= TC_WILL && c <= TC_DONT) || c == TC_SB) - { - p->w_telsubidx = 0; - p->w_telstate = c; - continue; - } - p->w_telstate = 0; - if (c != TC_IAC) - continue; - } - else if (c == TC_IAC) - { - p->w_telstate = c; - continue; - } - if (p->w_telstate == '\r') - { - p->w_telstate = 0; - if (c == 0) - continue; /* suppress trailing \0 */ - } - else if (c == '\n' && !p->w_telropts[TO_SGA]) - { - /* oops... simulate terminal line mode: insert \r */ - if (wp + 1 == rp) - { - if (free-- > 0) - { - if (len) - bcopy(rp, rp + 1, len); - rp++; - *wp++ = '\r'; - } - } - else - *wp++ = '\r'; - } - if (c == '\r') - p->w_telstate = c; - *wp++ = c; - } - return wp - buf; -} - -static void -TelReply(p, str, len) -struct win *p; -char *str; -int len; -{ - if (len <= 0) - return; - if (p->w_inlen + len > IOSIZE) - { - Msg(0, "Warning: telnet protocol overrun!"); - return; - } - bcopy(str, p->w_inbuf + p->w_inlen, len); - p->w_inlen += len; -} - -static void -TelDocmd(p, cmd, opt) -struct win *p; -int cmd, opt; -{ - unsigned char b[3]; - int repl = 0; - - if (cmd == TC_WONT) - debug2("[WONT %c %d]\n", TO_S[opt], opt); - if (cmd == TC_WILL) - debug2("[WILL %c %d]\n", TO_S[opt], opt); - if (cmd == TC_DONT) - debug2("[DONT %c %d]\n", TO_S[opt], opt); - if (cmd == TC_DO) - debug2("[DO %c %d]\n", TO_S[opt], opt); - - switch(cmd) - { - case TC_WILL: - if (p->w_telropts[opt] || opt == TO_TM) - return; - repl = TC_DONT; - if (opt == TO_ECHO || opt == TO_SGA || opt == TO_BINARY) - { - p->w_telropts[opt] = 1; - /* setcon(); */ - repl = TC_DO; - } - break; - case TC_WONT: - if (!p->w_telropts[opt] || opt == TO_TM) - return; - repl = TC_DONT; -#if 0 - if (opt == TO_ECHO || opt == TO_SGA) - setcon(); -#endif - p->w_telropts[opt] = 0; - break; - case TC_DO: - if (p->w_telmopts[opt]) - return; - repl = TC_WONT; - if (opt == TO_TTYPE || opt == TO_SGA || opt == TO_BINARY || opt == TO_NAWS || opt == TO_TM || opt == TO_LFLOW) - { - repl = TC_WILL; - p->w_telmopts[opt] = 1; - } - p->w_telmopts[TO_TM] = 0; - break; - case TC_DONT: - if (!p->w_telmopts[opt]) - return; - repl = TC_WONT; - p->w_telmopts[opt] = 0; - break; - } - b[0] = TC_IAC; - b[1] = repl; - b[2] = opt; - TelReply(p, (char *)b, 3); - if (cmd == TC_DO && opt == TO_NAWS) - TelWindowSize(p); -} - - -static void -TelDosub(p) -struct win *p; -{ - char trepl[20 + 6 + 1]; - int l; - - switch(p->w_telsubbuf[0]) - { - case TO_TTYPE: - if (p->w_telsubidx != 2 || p->w_telsubbuf[1] != 1) - return; - l = strlen(screenterm); - if (l >= 20) - break; - sprintf(trepl, "%c%c%c%c%s%c%c", TC_IAC, TC_SB, TO_TTYPE, 0, screenterm, TC_IAC, TC_SE); - TelReply(p, trepl, l + 6); - break; - case TO_LFLOW: - if (p->w_telsubidx != 2) - return; - debug1("[FLOW %d]\r\n", p->w_telsubbuf[1]); - break; - default: - break; - } -} - -void -TelBreak(p) -struct win *p; -{ - static unsigned char tel_break[] = { TC_IAC, TC_BREAK }; - TelReply(p, (char *)tel_break, 2); -} - -void -TelWindowSize(p) -struct win *p; -{ - char s[20], trepl[20], *t; - int i; - - debug2("TelWindowSize %d %d\n", p->w_width, p->w_height); - if (p->w_width == 0 || p->w_height == 0 || !p->w_telmopts[TO_NAWS]) - return; - sprintf(s, "%c%c%c%c%c%c%c%c%c", TC_SB, TC_SB, TO_NAWS, p->w_width / 256, p->w_width & 255, p->w_height / 256, p->w_height & 255, TC_SE, TC_SE); - t = trepl; - for (i = 0; i < 9; i++) - if ((unsigned char)(*t++ = s[i]) == TC_IAC) - *t++ = TC_IAC; - trepl[0] = TC_IAC; - t[-2] = TC_IAC; - debug(" - sending"); - for (i = 0; trepl + i < t; i++) - debug1(" %02x", (unsigned char)trepl[i]); - debug("\n"); - TelReply(p, trepl, t - trepl); -} - -static char tc_s[] = TC_S; -static char to_s[] = TO_S; - -void -TelStatus(p, buf, l) -struct win *p; -char *buf; -int l; -{ - int i; - - *buf++ = '['; - for (i = 0; to_s[i]; i++) - { - if (to_s[i] == ' ' || p->w_telmopts[i] == 0) - continue; - *buf++ = to_s[i]; - } - *buf++ = ':'; - for (i = 0; to_s[i]; i++) - { - if (to_s[i] == ' ' || p->w_telropts[i] == 0) - continue; - *buf++ = to_s[i]; - } - if (p->w_telstate == TEL_CONNECTING) - buf[-1] = 'C'; - else if (p->w_telstate && p->w_telstate != '\r') - { - *buf++ = ':'; - *buf++ = tc_s[p->w_telstate - TC_SE]; - } - *buf++ = ']'; - *buf = 0; - return; -} - -#endif /* BUILTIN_TELNET */ |