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Diffstat (limited to 'contrib/telnet/telnetd/utility.c')
| -rw-r--r-- | contrib/telnet/telnetd/utility.c | 1192 |
1 files changed, 1192 insertions, 0 deletions
diff --git a/contrib/telnet/telnetd/utility.c b/contrib/telnet/telnetd/utility.c new file mode 100644 index 0000000..9553d58 --- /dev/null +++ b/contrib/telnet/telnetd/utility.c @@ -0,0 +1,1192 @@ +/* + * Copyright (c) 1989, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)utility.c 8.4 (Berkeley) 5/30/95"; +#endif /* not lint */ + +#define PRINTOPTIONS +#include "telnetd.h" + +/* + * utility functions performing io related tasks + */ + +/* + * ttloop + * + * A small subroutine to flush the network output buffer, get some data + * from the network, and pass it through the telnet state machine. We + * also flush the pty input buffer (by dropping its data) if it becomes + * too full. + */ + + void +ttloop() +{ + void netflush(); + + DIAG(TD_REPORT, {sprintf(nfrontp, "td: ttloop\r\n"); + nfrontp += strlen(nfrontp);}); + if (nfrontp-nbackp) { + netflush(); + } + ncc = read(net, netibuf, sizeof netibuf); + if (ncc < 0) { + syslog(LOG_INFO, "ttloop: read: %m\n"); + exit(1); + } else if (ncc == 0) { + syslog(LOG_INFO, "ttloop: peer died: %m\n"); + exit(1); + } + DIAG(TD_REPORT, {sprintf(nfrontp, "td: ttloop read %d chars\r\n", ncc); + nfrontp += strlen(nfrontp);}); + netip = netibuf; + telrcv(); /* state machine */ + if (ncc > 0) { + pfrontp = pbackp = ptyobuf; + telrcv(); + } +} /* end of ttloop */ + +/* + * Check a descriptor to see if out of band data exists on it. + */ + int +stilloob(s) + int s; /* socket number */ +{ + static struct timeval timeout = { 0 }; + fd_set excepts; + int value; + + do { + FD_ZERO(&excepts); + FD_SET(s, &excepts); + value = select(s+1, (fd_set *)0, (fd_set *)0, &excepts, &timeout); + } while ((value == -1) && (errno == EINTR)); + + if (value < 0) { + fatalperror(pty, "select"); + } + if (FD_ISSET(s, &excepts)) { + return 1; + } else { + return 0; + } +} + + void +ptyflush() +{ + int n; + + if ((n = pfrontp - pbackp) > 0) { + DIAG((TD_REPORT | TD_PTYDATA), + { sprintf(nfrontp, "td: ptyflush %d chars\r\n", n); + nfrontp += strlen(nfrontp); }); + DIAG(TD_PTYDATA, printdata("pd", pbackp, n)); + n = write(pty, pbackp, n); + } + if (n < 0) { + if (errno == EWOULDBLOCK || errno == EINTR) + return; + cleanup(0); + } + pbackp += n; + if (pbackp == pfrontp) + pbackp = pfrontp = ptyobuf; +} + +/* + * nextitem() + * + * Return the address of the next "item" in the TELNET data + * stream. This will be the address of the next character if + * the current address is a user data character, or it will + * be the address of the character following the TELNET command + * if the current address is a TELNET IAC ("I Am a Command") + * character. + */ + char * +nextitem(current) + char *current; +{ + if ((*current&0xff) != IAC) { + return current+1; + } + switch (*(current+1)&0xff) { + case DO: + case DONT: + case WILL: + case WONT: + return current+3; + case SB: /* loop forever looking for the SE */ + { + register char *look = current+2; + + for (;;) { + if ((*look++&0xff) == IAC) { + if ((*look++&0xff) == SE) { + return look; + } + } + } + } + default: + return current+2; + } +} /* end of nextitem */ + + +/* + * netclear() + * + * We are about to do a TELNET SYNCH operation. Clear + * the path to the network. + * + * Things are a bit tricky since we may have sent the first + * byte or so of a previous TELNET command into the network. + * So, we have to scan the network buffer from the beginning + * until we are up to where we want to be. + * + * A side effect of what we do, just to keep things + * simple, is to clear the urgent data pointer. The principal + * caller should be setting the urgent data pointer AFTER calling + * us in any case. + */ + void +netclear() +{ + register char *thisitem, *next; + char *good; +#define wewant(p) ((nfrontp > p) && ((*p&0xff) == IAC) && \ + ((*(p+1)&0xff) != EC) && ((*(p+1)&0xff) != EL)) + +#ifdef ENCRYPTION + thisitem = nclearto > netobuf ? nclearto : netobuf; +#else /* ENCRYPTION */ + thisitem = netobuf; +#endif /* ENCRYPTION */ + + while ((next = nextitem(thisitem)) <= nbackp) { + thisitem = next; + } + + /* Now, thisitem is first before/at boundary. */ + +#ifdef ENCRYPTION + good = nclearto > netobuf ? nclearto : netobuf; +#else /* ENCRYPTION */ + good = netobuf; /* where the good bytes go */ +#endif /* ENCRYPTION */ + + while (nfrontp > thisitem) { + if (wewant(thisitem)) { + int length; + + next = thisitem; + do { + next = nextitem(next); + } while (wewant(next) && (nfrontp > next)); + length = next-thisitem; + memmove(good, thisitem, length); + good += length; + thisitem = next; + } else { + thisitem = nextitem(thisitem); + } + } + + nbackp = netobuf; + nfrontp = good; /* next byte to be sent */ + neturg = 0; +} /* end of netclear */ + +/* + * netflush + * Send as much data as possible to the network, + * handling requests for urgent data. + */ + void +netflush() +{ + int n; + extern int not42; + + if ((n = nfrontp - nbackp) > 0) { + DIAG(TD_REPORT, + { sprintf(nfrontp, "td: netflush %d chars\r\n", n); + n += strlen(nfrontp); /* get count first */ + nfrontp += strlen(nfrontp); /* then move pointer */ + }); +#ifdef ENCRYPTION + if (encrypt_output) { + char *s = nclearto ? nclearto : nbackp; + if (nfrontp - s > 0) { + (*encrypt_output)((unsigned char *)s, nfrontp-s); + nclearto = nfrontp; + } + } +#endif /* ENCRYPTION */ + /* + * if no urgent data, or if the other side appears to be an + * old 4.2 client (and thus unable to survive TCP urgent data), + * write the entire buffer in non-OOB mode. + */ + if ((neturg == 0) || (not42 == 0)) { + n = write(net, nbackp, n); /* normal write */ + } else { + n = neturg - nbackp; + /* + * In 4.2 (and 4.3) systems, there is some question about + * what byte in a sendOOB operation is the "OOB" data. + * To make ourselves compatible, we only send ONE byte + * out of band, the one WE THINK should be OOB (though + * we really have more the TCP philosophy of urgent data + * rather than the Unix philosophy of OOB data). + */ + if (n > 1) { + n = send(net, nbackp, n-1, 0); /* send URGENT all by itself */ + } else { + n = send(net, nbackp, n, MSG_OOB); /* URGENT data */ + } + } + } + if (n < 0) { + if (errno == EWOULDBLOCK || errno == EINTR) + return; + cleanup(0); + } + nbackp += n; +#ifdef ENCRYPTION + if (nbackp > nclearto) + nclearto = 0; +#endif /* ENCRYPTION */ + if (nbackp >= neturg) { + neturg = 0; + } + if (nbackp == nfrontp) { + nbackp = nfrontp = netobuf; +#ifdef ENCRYPTION + nclearto = 0; +#endif /* ENCRYPTION */ + } + return; +} /* end of netflush */ + + +/* + * writenet + * + * Just a handy little function to write a bit of raw data to the net. + * It will force a transmit of the buffer if necessary + * + * arguments + * ptr - A pointer to a character string to write + * len - How many bytes to write + */ + void +writenet(ptr, len) + register unsigned char *ptr; + register int len; +{ + /* flush buffer if no room for new data) */ + if ((&netobuf[BUFSIZ] - nfrontp) < len) { + /* if this fails, don't worry, buffer is a little big */ + netflush(); + } + + memmove(nfrontp, ptr, len); + nfrontp += len; + +} /* end of writenet */ + + +/* + * miscellaneous functions doing a variety of little jobs follow ... + */ + + + void +fatal(f, msg) + int f; + char *msg; +{ + char buf[BUFSIZ]; + + (void) sprintf(buf, "telnetd: %s.\r\n", msg); +#ifdef ENCRYPTION + if (encrypt_output) { + /* + * Better turn off encryption first.... + * Hope it flushes... + */ + encrypt_send_end(); + netflush(); + } +#endif /* ENCRYPTION */ + (void) write(f, buf, (int)strlen(buf)); + sleep(1); /*XXX*/ + exit(1); +} + + void +fatalperror(f, msg) + int f; + char *msg; +{ + char buf[BUFSIZ], *strerror(); + + (void) sprintf(buf, "%s: %s", msg, strerror(errno)); + fatal(f, buf); +} + +char editedhost[32]; + + void +edithost(pat, host) + register char *pat; + register char *host; +{ + register char *res = editedhost; + char *strncpy(); + + if (!pat) + pat = ""; + while (*pat) { + switch (*pat) { + + case '#': + if (*host) + host++; + break; + + case '@': + if (*host) + *res++ = *host++; + break; + + default: + *res++ = *pat; + break; + } + if (res == &editedhost[sizeof editedhost - 1]) { + *res = '\0'; + return; + } + pat++; + } + if (*host) + (void) strncpy(res, host, + sizeof editedhost - (res - editedhost) -1); + else + *res = '\0'; + editedhost[sizeof editedhost - 1] = '\0'; +} + +static char *putlocation; + + void +putstr(s) + register char *s; +{ + + while (*s) + putchr(*s++); +} + + void +putchr(cc) + int cc; +{ + *putlocation++ = cc; +} + +/* + * This is split on two lines so that SCCS will not see the M + * between two % signs and expand it... + */ +static char fmtstr[] = { "%l:%M\ +%P on %A, %d %B %Y" }; + + void +putf(cp, where) + register char *cp; + char *where; +{ + char *slash; + time_t t; + char db[100]; +#ifdef STREAMSPTY + extern char *strchr(); +#else + extern char *strrchr(); +#endif + + putlocation = where; + + while (*cp) { + if (*cp != '%') { + putchr(*cp++); + continue; + } + switch (*++cp) { + + case 't': +#ifdef STREAMSPTY + /* names are like /dev/pts/2 -- we want pts/2 */ + slash = strchr(line+1, '/'); +#else + slash = strrchr(line, '/'); +#endif + if (slash == (char *) 0) + putstr(line); + else + putstr(&slash[1]); + break; + + case 'h': + putstr(editedhost); + break; + + case 'd': + (void)time(&t); + (void)strftime(db, sizeof(db), fmtstr, localtime(&t)); + putstr(db); + break; + + case '%': + putchr('%'); + break; + } + cp++; + } +} + +#ifdef DIAGNOSTICS +/* + * Print telnet options and commands in plain text, if possible. + */ + void +printoption(fmt, option) + register char *fmt; + register int option; +{ + if (TELOPT_OK(option)) + sprintf(nfrontp, "%s %s\r\n", fmt, TELOPT(option)); + else if (TELCMD_OK(option)) + sprintf(nfrontp, "%s %s\r\n", fmt, TELCMD(option)); + else + sprintf(nfrontp, "%s %d\r\n", fmt, option); + nfrontp += strlen(nfrontp); + return; +} + + void +printsub(direction, pointer, length) + char direction; /* '<' or '>' */ + unsigned char *pointer; /* where suboption data sits */ + int length; /* length of suboption data */ +{ + register int i; + char buf[512]; + + if (!(diagnostic & TD_OPTIONS)) + return; + + if (direction) { + sprintf(nfrontp, "td: %s suboption ", + direction == '<' ? "recv" : "send"); + nfrontp += strlen(nfrontp); + if (length >= 3) { + register int j; + + i = pointer[length-2]; + j = pointer[length-1]; + + if (i != IAC || j != SE) { + sprintf(nfrontp, "(terminated by "); + nfrontp += strlen(nfrontp); + if (TELOPT_OK(i)) + sprintf(nfrontp, "%s ", TELOPT(i)); + else if (TELCMD_OK(i)) + sprintf(nfrontp, "%s ", TELCMD(i)); + else + sprintf(nfrontp, "%d ", i); + nfrontp += strlen(nfrontp); + if (TELOPT_OK(j)) + sprintf(nfrontp, "%s", TELOPT(j)); + else if (TELCMD_OK(j)) + sprintf(nfrontp, "%s", TELCMD(j)); + else + sprintf(nfrontp, "%d", j); + nfrontp += strlen(nfrontp); + sprintf(nfrontp, ", not IAC SE!) "); + nfrontp += strlen(nfrontp); + } + } + length -= 2; + } + if (length < 1) { + sprintf(nfrontp, "(Empty suboption??\?)"); + nfrontp += strlen(nfrontp); + return; + } + switch (pointer[0]) { + case TELOPT_TTYPE: + sprintf(nfrontp, "TERMINAL-TYPE "); + nfrontp += strlen(nfrontp); + switch (pointer[1]) { + case TELQUAL_IS: + sprintf(nfrontp, "IS \"%.*s\"", length-2, (char *)pointer+2); + break; + case TELQUAL_SEND: + sprintf(nfrontp, "SEND"); + break; + default: + sprintf(nfrontp, + "- unknown qualifier %d (0x%x).", + pointer[1], pointer[1]); + } + nfrontp += strlen(nfrontp); + break; + case TELOPT_TSPEED: + sprintf(nfrontp, "TERMINAL-SPEED"); + nfrontp += strlen(nfrontp); + if (length < 2) { + sprintf(nfrontp, " (empty suboption??\?)"); + nfrontp += strlen(nfrontp); + break; + } + switch (pointer[1]) { + case TELQUAL_IS: + sprintf(nfrontp, " IS %.*s", length-2, (char *)pointer+2); + nfrontp += strlen(nfrontp); + break; + default: + if (pointer[1] == 1) + sprintf(nfrontp, " SEND"); + else + sprintf(nfrontp, " %d (unknown)", pointer[1]); + nfrontp += strlen(nfrontp); + for (i = 2; i < length; i++) { + sprintf(nfrontp, " ?%d?", pointer[i]); + nfrontp += strlen(nfrontp); + } + break; + } + break; + + case TELOPT_LFLOW: + sprintf(nfrontp, "TOGGLE-FLOW-CONTROL"); + nfrontp += strlen(nfrontp); + if (length < 2) { + sprintf(nfrontp, " (empty suboption??\?)"); + nfrontp += strlen(nfrontp); + break; + } + switch (pointer[1]) { + case LFLOW_OFF: + sprintf(nfrontp, " OFF"); break; + case LFLOW_ON: + sprintf(nfrontp, " ON"); break; + case LFLOW_RESTART_ANY: + sprintf(nfrontp, " RESTART-ANY"); break; + case LFLOW_RESTART_XON: + sprintf(nfrontp, " RESTART-XON"); break; + default: + sprintf(nfrontp, " %d (unknown)", pointer[1]); + } + nfrontp += strlen(nfrontp); + for (i = 2; i < length; i++) { + sprintf(nfrontp, " ?%d?", pointer[i]); + nfrontp += strlen(nfrontp); + } + break; + + case TELOPT_NAWS: + sprintf(nfrontp, "NAWS"); + nfrontp += strlen(nfrontp); + if (length < 2) { + sprintf(nfrontp, " (empty suboption??\?)"); + nfrontp += strlen(nfrontp); + break; + } + if (length == 2) { + sprintf(nfrontp, " ?%d?", pointer[1]); + nfrontp += strlen(nfrontp); + break; + } + sprintf(nfrontp, " %d %d (%d)", + pointer[1], pointer[2], + (int)((((unsigned int)pointer[1])<<8)|((unsigned int)pointer[2]))); + nfrontp += strlen(nfrontp); + if (length == 4) { + sprintf(nfrontp, " ?%d?", pointer[3]); + nfrontp += strlen(nfrontp); + break; + } + sprintf(nfrontp, " %d %d (%d)", + pointer[3], pointer[4], + (int)((((unsigned int)pointer[3])<<8)|((unsigned int)pointer[4]))); + nfrontp += strlen(nfrontp); + for (i = 5; i < length; i++) { + sprintf(nfrontp, " ?%d?", pointer[i]); + nfrontp += strlen(nfrontp); + } + break; + + case TELOPT_LINEMODE: + sprintf(nfrontp, "LINEMODE "); + nfrontp += strlen(nfrontp); + if (length < 2) { + sprintf(nfrontp, " (empty suboption??\?)"); + nfrontp += strlen(nfrontp); + break; + } + switch (pointer[1]) { + case WILL: + sprintf(nfrontp, "WILL "); + goto common; + case WONT: + sprintf(nfrontp, "WONT "); + goto common; + case DO: + sprintf(nfrontp, "DO "); + goto common; + case DONT: + sprintf(nfrontp, "DONT "); + common: + nfrontp += strlen(nfrontp); + if (length < 3) { + sprintf(nfrontp, "(no option??\?)"); + nfrontp += strlen(nfrontp); + break; + } + switch (pointer[2]) { + case LM_FORWARDMASK: + sprintf(nfrontp, "Forward Mask"); + nfrontp += strlen(nfrontp); + for (i = 3; i < length; i++) { + sprintf(nfrontp, " %x", pointer[i]); + nfrontp += strlen(nfrontp); + } + break; + default: + sprintf(nfrontp, "%d (unknown)", pointer[2]); + nfrontp += strlen(nfrontp); + for (i = 3; i < length; i++) { + sprintf(nfrontp, " %d", pointer[i]); + nfrontp += strlen(nfrontp); + } + break; + } + break; + + case LM_SLC: + sprintf(nfrontp, "SLC"); + nfrontp += strlen(nfrontp); + for (i = 2; i < length - 2; i += 3) { + if (SLC_NAME_OK(pointer[i+SLC_FUNC])) + sprintf(nfrontp, " %s", SLC_NAME(pointer[i+SLC_FUNC])); + else + sprintf(nfrontp, " %d", pointer[i+SLC_FUNC]); + nfrontp += strlen(nfrontp); + switch (pointer[i+SLC_FLAGS]&SLC_LEVELBITS) { + case SLC_NOSUPPORT: + sprintf(nfrontp, " NOSUPPORT"); break; + case SLC_CANTCHANGE: + sprintf(nfrontp, " CANTCHANGE"); break; + case SLC_VARIABLE: + sprintf(nfrontp, " VARIABLE"); break; + case SLC_DEFAULT: + sprintf(nfrontp, " DEFAULT"); break; + } + nfrontp += strlen(nfrontp); + sprintf(nfrontp, "%s%s%s", + pointer[i+SLC_FLAGS]&SLC_ACK ? "|ACK" : "", + pointer[i+SLC_FLAGS]&SLC_FLUSHIN ? "|FLUSHIN" : "", + pointer[i+SLC_FLAGS]&SLC_FLUSHOUT ? "|FLUSHOUT" : ""); + nfrontp += strlen(nfrontp); + if (pointer[i+SLC_FLAGS]& ~(SLC_ACK|SLC_FLUSHIN| + SLC_FLUSHOUT| SLC_LEVELBITS)) { + sprintf(nfrontp, "(0x%x)", pointer[i+SLC_FLAGS]); + nfrontp += strlen(nfrontp); + } + sprintf(nfrontp, " %d;", pointer[i+SLC_VALUE]); + nfrontp += strlen(nfrontp); + if ((pointer[i+SLC_VALUE] == IAC) && + (pointer[i+SLC_VALUE+1] == IAC)) + i++; + } + for (; i < length; i++) { + sprintf(nfrontp, " ?%d?", pointer[i]); + nfrontp += strlen(nfrontp); + } + break; + + case LM_MODE: + sprintf(nfrontp, "MODE "); + nfrontp += strlen(nfrontp); + if (length < 3) { + sprintf(nfrontp, "(no mode??\?)"); + nfrontp += strlen(nfrontp); + break; + } + { + char tbuf[32]; + sprintf(tbuf, "%s%s%s%s%s", + pointer[2]&MODE_EDIT ? "|EDIT" : "", + pointer[2]&MODE_TRAPSIG ? "|TRAPSIG" : "", + pointer[2]&MODE_SOFT_TAB ? "|SOFT_TAB" : "", + pointer[2]&MODE_LIT_ECHO ? "|LIT_ECHO" : "", + pointer[2]&MODE_ACK ? "|ACK" : ""); + sprintf(nfrontp, "%s", tbuf[1] ? &tbuf[1] : "0"); + nfrontp += strlen(nfrontp); + } + if (pointer[2]&~(MODE_EDIT|MODE_TRAPSIG|MODE_ACK)) { + sprintf(nfrontp, " (0x%x)", pointer[2]); + nfrontp += strlen(nfrontp); + } + for (i = 3; i < length; i++) { + sprintf(nfrontp, " ?0x%x?", pointer[i]); + nfrontp += strlen(nfrontp); + } + break; + default: + sprintf(nfrontp, "%d (unknown)", pointer[1]); + nfrontp += strlen(nfrontp); + for (i = 2; i < length; i++) { + sprintf(nfrontp, " %d", pointer[i]); + nfrontp += strlen(nfrontp); + } + } + break; + + case TELOPT_STATUS: { + register char *cp; + register int j, k; + + sprintf(nfrontp, "STATUS"); + nfrontp += strlen(nfrontp); + + switch (pointer[1]) { + default: + if (pointer[1] == TELQUAL_SEND) + sprintf(nfrontp, " SEND"); + else + sprintf(nfrontp, " %d (unknown)", pointer[1]); + nfrontp += strlen(nfrontp); + for (i = 2; i < length; i++) { + sprintf(nfrontp, " ?%d?", pointer[i]); + nfrontp += strlen(nfrontp); + } + break; + case TELQUAL_IS: + sprintf(nfrontp, " IS\r\n"); + nfrontp += strlen(nfrontp); + + for (i = 2; i < length; i++) { + switch(pointer[i]) { + case DO: cp = "DO"; goto common2; + case DONT: cp = "DONT"; goto common2; + case WILL: cp = "WILL"; goto common2; + case WONT: cp = "WONT"; goto common2; + common2: + i++; + if (TELOPT_OK(pointer[i])) + sprintf(nfrontp, " %s %s", cp, TELOPT(pointer[i])); + else + sprintf(nfrontp, " %s %d", cp, pointer[i]); + nfrontp += strlen(nfrontp); + + sprintf(nfrontp, "\r\n"); + nfrontp += strlen(nfrontp); + break; + + case SB: + sprintf(nfrontp, " SB "); + nfrontp += strlen(nfrontp); + i++; + j = k = i; + while (j < length) { + if (pointer[j] == SE) { + if (j+1 == length) + break; + if (pointer[j+1] == SE) + j++; + else + break; + } + pointer[k++] = pointer[j++]; + } + printsub(0, &pointer[i], k - i); + if (i < length) { + sprintf(nfrontp, " SE"); + nfrontp += strlen(nfrontp); + i = j; + } else + i = j - 1; + + sprintf(nfrontp, "\r\n"); + nfrontp += strlen(nfrontp); + + break; + + default: + sprintf(nfrontp, " %d", pointer[i]); + nfrontp += strlen(nfrontp); + break; + } + } + break; + } + break; + } + + case TELOPT_XDISPLOC: + sprintf(nfrontp, "X-DISPLAY-LOCATION "); + nfrontp += strlen(nfrontp); + switch (pointer[1]) { + case TELQUAL_IS: + sprintf(nfrontp, "IS \"%.*s\"", length-2, (char *)pointer+2); + break; + case TELQUAL_SEND: + sprintf(nfrontp, "SEND"); + break; + default: + sprintf(nfrontp, "- unknown qualifier %d (0x%x).", + pointer[1], pointer[1]); + } + nfrontp += strlen(nfrontp); + break; + + case TELOPT_NEW_ENVIRON: + sprintf(nfrontp, "NEW-ENVIRON "); + goto env_common1; + case TELOPT_OLD_ENVIRON: + sprintf(nfrontp, "OLD-ENVIRON"); + env_common1: + nfrontp += strlen(nfrontp); + switch (pointer[1]) { + case TELQUAL_IS: + sprintf(nfrontp, "IS "); + goto env_common; + case TELQUAL_SEND: + sprintf(nfrontp, "SEND "); + goto env_common; + case TELQUAL_INFO: + sprintf(nfrontp, "INFO "); + env_common: + nfrontp += strlen(nfrontp); + { + register int noquote = 2; + for (i = 2; i < length; i++ ) { + switch (pointer[i]) { + case NEW_ENV_VAR: + sprintf(nfrontp, "\" VAR " + noquote); + nfrontp += strlen(nfrontp); + noquote = 2; + break; + + case NEW_ENV_VALUE: + sprintf(nfrontp, "\" VALUE " + noquote); + nfrontp += strlen(nfrontp); + noquote = 2; + break; + + case ENV_ESC: + sprintf(nfrontp, "\" ESC " + noquote); + nfrontp += strlen(nfrontp); + noquote = 2; + break; + + case ENV_USERVAR: + sprintf(nfrontp, "\" USERVAR " + noquote); + nfrontp += strlen(nfrontp); + noquote = 2; + break; + + default: + def_case: + if (isprint(pointer[i]) && pointer[i] != '"') { + if (noquote) { + *nfrontp++ = '"'; + noquote = 0; + } + *nfrontp++ = pointer[i]; + } else { + sprintf(nfrontp, "\" %03o " + noquote, + pointer[i]); + nfrontp += strlen(nfrontp); + noquote = 2; + } + break; + } + } + if (!noquote) + *nfrontp++ = '"'; + break; + } + } + break; + +#if defined(AUTHENTICATION) + case TELOPT_AUTHENTICATION: + sprintf(nfrontp, "AUTHENTICATION"); + nfrontp += strlen(nfrontp); + + if (length < 2) { + sprintf(nfrontp, " (empty suboption??\?)"); + nfrontp += strlen(nfrontp); + break; + } + switch (pointer[1]) { + case TELQUAL_REPLY: + case TELQUAL_IS: + sprintf(nfrontp, " %s ", (pointer[1] == TELQUAL_IS) ? + "IS" : "REPLY"); + nfrontp += strlen(nfrontp); + if (AUTHTYPE_NAME_OK(pointer[2])) + sprintf(nfrontp, "%s ", AUTHTYPE_NAME(pointer[2])); + else + sprintf(nfrontp, "%d ", pointer[2]); + nfrontp += strlen(nfrontp); + if (length < 3) { + sprintf(nfrontp, "(partial suboption??\?)"); + nfrontp += strlen(nfrontp); + break; + } + sprintf(nfrontp, "%s|%s", + ((pointer[3] & AUTH_WHO_MASK) == AUTH_WHO_CLIENT) ? + "CLIENT" : "SERVER", + ((pointer[3] & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) ? + "MUTUAL" : "ONE-WAY"); + nfrontp += strlen(nfrontp); + + auth_printsub(&pointer[1], length - 1, buf, sizeof(buf)); + sprintf(nfrontp, "%s", buf); + nfrontp += strlen(nfrontp); + break; + + case TELQUAL_SEND: + i = 2; + sprintf(nfrontp, " SEND "); + nfrontp += strlen(nfrontp); + while (i < length) { + if (AUTHTYPE_NAME_OK(pointer[i])) + sprintf(nfrontp, "%s ", AUTHTYPE_NAME(pointer[i])); + else + sprintf(nfrontp, "%d ", pointer[i]); + nfrontp += strlen(nfrontp); + if (++i >= length) { + sprintf(nfrontp, "(partial suboption??\?)"); + nfrontp += strlen(nfrontp); + break; + } + sprintf(nfrontp, "%s|%s ", + ((pointer[i] & AUTH_WHO_MASK) == AUTH_WHO_CLIENT) ? + "CLIENT" : "SERVER", + ((pointer[i] & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) ? + "MUTUAL" : "ONE-WAY"); + nfrontp += strlen(nfrontp); + ++i; + } + break; + + case TELQUAL_NAME: + i = 2; + sprintf(nfrontp, " NAME \""); + nfrontp += strlen(nfrontp); + while (i < length) + *nfrontp += pointer[i++]; + *nfrontp += '"'; + break; + + default: + for (i = 2; i < length; i++) { + sprintf(nfrontp, " ?%d?", pointer[i]); + nfrontp += strlen(nfrontp); + } + break; + } + break; +#endif + +#ifdef ENCRYPTION + case TELOPT_ENCRYPT: + sprintf(nfrontp, "ENCRYPT"); + nfrontp += strlen(nfrontp); + if (length < 2) { + sprintf(nfrontp, " (empty suboption??\?)"); + nfrontp += strlen(nfrontp); + break; + } + switch (pointer[1]) { + case ENCRYPT_START: + sprintf(nfrontp, " START"); + nfrontp += strlen(nfrontp); + break; + + case ENCRYPT_END: + sprintf(nfrontp, " END"); + nfrontp += strlen(nfrontp); + break; + + case ENCRYPT_REQSTART: + sprintf(nfrontp, " REQUEST-START"); + nfrontp += strlen(nfrontp); + break; + + case ENCRYPT_REQEND: + sprintf(nfrontp, " REQUEST-END"); + nfrontp += strlen(nfrontp); + break; + + case ENCRYPT_IS: + case ENCRYPT_REPLY: + sprintf(nfrontp, " %s ", (pointer[1] == ENCRYPT_IS) ? + "IS" : "REPLY"); + nfrontp += strlen(nfrontp); + if (length < 3) { + sprintf(nfrontp, " (partial suboption??\?)"); + nfrontp += strlen(nfrontp); + break; + } + if (ENCTYPE_NAME_OK(pointer[2])) + sprintf(nfrontp, "%s ", ENCTYPE_NAME(pointer[2])); + else + sprintf(nfrontp, " %d (unknown)", pointer[2]); + nfrontp += strlen(nfrontp); + + encrypt_printsub(&pointer[1], length - 1, buf, sizeof(buf)); + sprintf(nfrontp, "%s", buf); + nfrontp += strlen(nfrontp); + break; + + case ENCRYPT_SUPPORT: + i = 2; + sprintf(nfrontp, " SUPPORT "); + nfrontp += strlen(nfrontp); + while (i < length) { + if (ENCTYPE_NAME_OK(pointer[i])) + sprintf(nfrontp, "%s ", ENCTYPE_NAME(pointer[i])); + else + sprintf(nfrontp, "%d ", pointer[i]); + nfrontp += strlen(nfrontp); + i++; + } + break; + + case ENCRYPT_ENC_KEYID: + sprintf(nfrontp, " ENC_KEYID", pointer[1]); + nfrontp += strlen(nfrontp); + goto encommon; + + case ENCRYPT_DEC_KEYID: + sprintf(nfrontp, " DEC_KEYID", pointer[1]); + nfrontp += strlen(nfrontp); + goto encommon; + + default: + sprintf(nfrontp, " %d (unknown)", pointer[1]); + nfrontp += strlen(nfrontp); + encommon: + for (i = 2; i < length; i++) { + sprintf(nfrontp, " %d", pointer[i]); + nfrontp += strlen(nfrontp); + } + break; + } + break; +#endif /* ENCRYPTION */ + + default: + if (TELOPT_OK(pointer[0])) + sprintf(nfrontp, "%s (unknown)", TELOPT(pointer[0])); + else + sprintf(nfrontp, "%d (unknown)", pointer[i]); + nfrontp += strlen(nfrontp); + for (i = 1; i < length; i++) { + sprintf(nfrontp, " %d", pointer[i]); + nfrontp += strlen(nfrontp); + } + break; + } + sprintf(nfrontp, "\r\n"); + nfrontp += strlen(nfrontp); +} + +/* + * Dump a data buffer in hex and ascii to the output data stream. + */ + void +printdata(tag, ptr, cnt) + register char *tag; + register char *ptr; + register int cnt; +{ + register int i; + char xbuf[30]; + + while (cnt) { + /* flush net output buffer if no room for new data) */ + if ((&netobuf[BUFSIZ] - nfrontp) < 80) { + netflush(); + } + + /* add a line of output */ + sprintf(nfrontp, "%s: ", tag); + nfrontp += strlen(nfrontp); + for (i = 0; i < 20 && cnt; i++) { + sprintf(nfrontp, "%02x", *ptr); + nfrontp += strlen(nfrontp); + if (isprint(*ptr)) { + xbuf[i] = *ptr; + } else { + xbuf[i] = '.'; + } + if (i % 2) { + *nfrontp = ' '; + nfrontp++; + } + cnt--; + ptr++; + } + xbuf[i] = '\0'; + sprintf(nfrontp, " %s\r\n", xbuf ); + nfrontp += strlen(nfrontp); + } +} +#endif /* DIAGNOSTICS */ |
