+++ /dev/null
-
-/*
- * utils.c - various utility functions used in pppoed.
- *
- * mostly stolen from ppp-2.3.10 by Marc Boucher <marc@mbsi.ca>
- *
- * Feb 18/2000 Made fully re-entrant (JHS)
- *
- * Copyright (c) 1999 The Australian National University.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms are permitted
- * provided that the above copyright poe_notice and this paragraph are
- * duplicated in all such forms and that any documentation,
- * advertising materials, and other materials related to such
- * distribution and use acknowledge that the software was developed
- * by the Australian National University. The name of the University
- * may not be used to endorse or promote products derived from this
- * software without specific prior written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- */
-
-#include <stdio.h> /* stdio */
-#include <stdlib.h> /* strtoul(), realloc() */
-#include <string.h> /* memcpy() */
-#include <unistd.h> /* STDIN_FILENO,exec */
-#include <errno.h> /* errno */
-
-#include <sys/time.h>
-
-#include <net/ethernet.h>
-#include <netinet/in.h>
-
-#include <stdarg.h>
-#include <ctype.h>
-#include <syslog.h>
-#include <limits.h>
-#include <paths.h>
-
-#include "pppoe.h"
-
-static char pidfilename[PATH_MAX]; /* name of pid file */
-
-/*
-static int detached = 0;
- log_to_fd = -1;
- */
-
-static void vslp_printer (void *, char *,...);
-static void format_packet (struct pppoe_packet *, int, void (*)(void *, char *,...), void *);
-static void format_tag (struct pppoe_tag *, void (*)(void *, char *,...), void *);
-struct buffer_poe_info {
- char *ptr;
- int len;
-};
-
-void poe_die (int status);
-
-
-/*
- * vpoe_slprintf - like vsprintf, except we
- * also specify the length of the output buffer, and we handle
- * %r (recursive format), %m (poe_error message), %v (visible string),
- * %q (quoted string), %t (current time) and %E (Ether address) formats.
- * Doesn't do floating-point formats.
- * Returns the number of chars put into buf.
- */
-#define OUTCHAR(c) (buflen > 0? (--buflen, *buf++ = (c)): 0)
-
-int
-vpoe_slprintf (char *buf, int buflen, char *fmt, va_list args)
-{
- int c, i, n;
- int width, prec, fillch;
- int base, len, neg, quoted;
- unsigned long val = 0;
- char *str, *f, *buf0;
- unsigned char *p;
- char num[32];
- time_t t;
- static char hexchars[] = "0123456789abcdef";
- struct buffer_poe_info bufpoe_info;
-
- buf0 = buf;
- --buflen;
- while (buflen > 0) {
- for (f = fmt; *f != '%' && *f != 0; ++f);
- if (f > fmt) {
- len = f - fmt;
- if (len > buflen)
- len = buflen;
- memcpy (buf, fmt, len);
- buf += len;
- buflen -= len;
- fmt = f;
- }
- if (*fmt == 0)
- break;
- c = *++fmt;
- width = 0;
- prec = -1;
- fillch = ' ';
- if (c == '0') {
- fillch = '0';
- c = *++fmt;
- }
- if (c == '*') {
- width = va_arg (args, int);
- c = *++fmt;
- }
- else {
- while (isdigit (c)) {
- width = width * 10 + c - '0';
- c = *++fmt;
- }
- }
- if (c == '.') {
- c = *++fmt;
- if (c == '*') {
- prec = va_arg (args, int);
- c = *++fmt;
- }
- else {
- prec = 0;
- while (isdigit (c)) {
- prec = prec * 10 + c - '0';
- c = *++fmt;
- }
- }
- }
- str = 0;
- base = 0;
- neg = 0;
- ++fmt;
- switch (c) {
- case 'd':
- i = va_arg (args, int);
- if (i < 0) {
- neg = 1;
- val = -i;
- }
- else
- val = i;
- base = 10;
- break;
- case 'o':
- val = va_arg (args, unsigned int);
- base = 8;
- break;
- case 'x':
- case 'X':
- val = va_arg (args, unsigned int);
- base = 16;
- break;
- case 'p':
- val = (unsigned long) va_arg (args, void *);
- base = 16;
- neg = 2;
- break;
- case 's':
- str = va_arg (args, char *);
- break;
- case 'c':
- num[0] = va_arg (args, int);
- num[1] = 0;
- str = num;
- break;
- case 'm':
- str = strerror (errno);
- break;
- case 'E':
- p = va_arg (args, unsigned char *);
- for (n = ETH_ALEN; n > 0; --n) {
- c = *p++;
- OUTCHAR (hexchars[(c >> 4) & 0xf]);
- OUTCHAR (hexchars[c & 0xf]);
- if (n > 1)
- OUTCHAR (':');
- }
- continue;
- case 'r':
- f = va_arg (args, char *);
-#ifndef __powerpc__
- n = vpoe_slprintf (buf, buflen + 1, f, va_arg (args, va_list));
-#else
- /* On the powerpc, a va_list is an array of 1 structure */
- n = vpoe_slprintf (buf, buflen + 1, f, va_arg (args, void *));
-#endif
- buf += n;
- buflen -= n;
- continue;
- case 't':
- time (&t);
- str = ctime (&t);
- str += 4; /* chop off the day name */
- str[15] = 0; /* chop off year and newline */
- break;
- case 'v': /* "visible" string */
- case 'q': /* quoted string */
- quoted = c == 'q';
- p = va_arg (args, unsigned char *);
- if (fillch == '0' && prec >= 0) {
- n = prec;
- }
- else {
- n = strlen ((char *) p);
- if (prec >= 0 && n > prec)
- n = prec;
- }
- while (n > 0 && buflen > 0) {
- c = *p++;
- --n;
- if (!quoted && c >= 0x80) {
- OUTCHAR ('M');
- OUTCHAR ('-');
- c -= 0x80;
- }
- if (quoted && (c == '"' || c == '\\'))
- OUTCHAR ('\\');
- if (c < 0x20 || (0x7f <= c && c < 0xa0)) {
- if (quoted) {
- OUTCHAR ('\\');
- switch (c) {
- case '\t':
- OUTCHAR ('t');
- break;
- case '\n':
- OUTCHAR ('n');
- break;
- case '\b':
- OUTCHAR ('b');
- break;
- case '\f':
- OUTCHAR ('f');
- break;
- default:
- OUTCHAR ('x');
- OUTCHAR (hexchars[c >> 4]);
- OUTCHAR (hexchars[c & 0xf]);
- }
- }
- else {
- if (c == '\t')
- OUTCHAR (c);
- else {
- OUTCHAR ('^');
- OUTCHAR (c ^ 0x40);
- }
- }
- }
- else
- OUTCHAR (c);
- }
- continue;
- case 'P': /* print PPPoE packet */
- bufpoe_info.ptr = buf;
- bufpoe_info.len = buflen + 1;
- p = va_arg (args, unsigned char *);
- n = va_arg (args, int);
- format_packet ((struct pppoe_packet *) p, n, vslp_printer, &bufpoe_info);
- buf = bufpoe_info.ptr;
- buflen = bufpoe_info.len - 1;
- continue;
- case 'T': /* print PPPoE tag */
- bufpoe_info.ptr = buf;
- bufpoe_info.len = buflen + 1;
- p = va_arg (args, unsigned char *);
- format_tag ((struct pppoe_tag *) p, vslp_printer, &bufpoe_info);
- buf = bufpoe_info.ptr;
- buflen = bufpoe_info.len - 1;
- continue;
- case 'B':
- p = va_arg (args, unsigned char *);
- for (n = prec; n > 0; --n) {
- c = *p++;
- if (fillch == ' ')
- OUTCHAR (' ');
- OUTCHAR (hexchars[(c >> 4) & 0xf]);
- OUTCHAR (hexchars[c & 0xf]);
- }
- continue;
- default:
- *buf++ = '%';
- if (c != '%')
- --fmt; /* so %z outputs %z etc. */
- --buflen;
- continue;
- }
- if (base != 0) {
- str = num + sizeof (num);
- *--str = 0;
- while (str > num + neg) {
- *--str = hexchars[val % base];
- val = val / base;
- if (--prec <= 0 && val == 0)
- break;
- }
- switch (neg) {
- case 1:
- *--str = '-';
- break;
- case 2:
- *--str = 'x';
- *--str = '0';
- break;
- }
- len = num + sizeof (num) - 1 - str;
- }
- else {
- len = strlen (str);
- if (prec >= 0 && len > prec)
- len = prec;
- }
- if (width > 0) {
- if (width > buflen)
- width = buflen;
- if ((n = width - len) > 0) {
- buflen -= n;
- for (; n > 0; --n)
- *buf++ = fillch;
- }
- }
- if (len > buflen)
- len = buflen;
- memcpy (buf, str, len);
- buf += len;
- buflen -= len;
- }
- *buf = 0;
- return buf - buf0;
-}
-
-/*
- * vslp_printer - used in processing a %P format
- */
-static void
-vslp_printer (void *arg, char *fmt,...)
-{
- int n;
- va_list pvar;
- struct buffer_poe_info *bi;
-
- va_start (pvar, fmt);
-
- bi = (struct buffer_poe_info *) arg;
- n = vpoe_slprintf (bi->ptr, bi->len, fmt, pvar);
- va_end (pvar);
-
- bi->ptr += n;
- bi->len -= n;
-}
-
-/*
- * format_packet - make a readable representation of a packet,
- * calling `printer(arg, format, ...)' to output it.
- */
-static void
-format_packet (struct pppoe_packet *p,
- int len,
- void (*printer) (void *, char *,...),
- void *arg)
-{
- struct pppoe_tag *t;
-
- printer (arg, "Ether addr: %E\n", p->addr.sll_addr);
-
- switch ((unsigned) ntohs (p->addr.sll_protocol)) {
- case ETH_P_PPPOE_DISC:
- printer (arg, " (PPPOE Discovery)\n");
- break;
- case ETH_P_PPPOE_SESS:
- printer (arg, " (PPPOE Session)\n");
- break;
- }
-
- printer (arg, " PPPoE hdr: ver=0x%01x type=0x%01x code=0x%02x "
- "sid=0x%04x length=0x%04x ", (unsigned) p->hdr->ver,
- (unsigned) p->hdr->type, (unsigned) p->hdr->code, (unsigned) p->hdr->sid,
- (unsigned) ntohs (p->hdr->length));
-
- switch (p->hdr->code) {
- case PADI_CODE:
- printer (arg, "(PADI)\n");
- break;
- case PADO_CODE:
- printer (arg, "(PADO)\n");
- break;
- case PADR_CODE:
- printer (arg, "(PADR)\n");
- break;
- case PADS_CODE:
- printer (arg, "(PADS)\n");
- break;
- case PADT_CODE:
- printer (arg, "(PADT)\n");
- break;
- default:
- printer (arg, "(Unknown)\n");
- }
-
-#if 0
- if (ntohs (p->addr.sll_protocol) != ETH_P_PPPOE_DISC) {
- len = ntohs (p->length);
-
- if (len > 64)
- printer (arg, " %.64B ...", (p + 1));
- else
- printer (arg, " %.*B", len, p + 1);
-
- return;
- }
-#endif
-
- for(t = (struct pppoe_tag *) (&p->hdr->tag);
- (t < (struct pppoe_tag *) ((char *) (&p->hdr->tag) + ntohs (p->hdr->length))) &&
- ntohs (t->tag_type) != PTT_EOL;
- t = (struct pppoe_tag *) ((char *) (t + 1) + ntohs (t->tag_len))) {
- format_tag (t, printer, arg);
- }
-}
-
-/*
- * format_tag - make a readable representation of a tag,
- * calling `printer(arg, format, ...)' to output it.
- */
-static void
-format_tag (struct pppoe_tag *t,
- void (*printer) (void *, char *,...),
- void *arg)
-{
- printer (arg, " PPPoE tag: type=%04x length=%04x ",
- ntohs (t->tag_type), ntohs (t->tag_len));
- switch ( t->tag_type ) {
- case PTT_EOL:
- printer (arg, "(End of list)");
- break;
- case PTT_SRV_NAME:
- printer (arg, "(Service name)");
- break;
- case PTT_AC_NAME:
- printer (arg, "(AC Name)");
- break;
- case PTT_HOST_UNIQ:
- printer (arg, "(Host Uniq)");
- break;
- case PTT_AC_COOKIE:
- printer (arg, "(AC Cookie)");
- break;
- case PTT_VENDOR:
- printer (arg, "(Vendor Specific)");
- break;
- case PTT_RELAY_SID:
- printer (arg, "(Relay Session ID)");
- break;
- case PTT_SRV_ERR:
- printer (arg, "(Service Name Error)");
- break;
- case PTT_SYS_ERR:
- printer (arg, "(AC System Error)");
- break;
- case PTT_GEN_ERR:
- printer (arg, "(Generic Error)");
- break;
- default:
- printer (arg, "(Unknown)");
- }
- if (ntohs (t->tag_len) > 0)
- switch ( t->tag_type ) {
- case PTT_SRV_NAME:
- case PTT_AC_NAME:
- case PTT_SRV_ERR:
- case PTT_SYS_ERR:
- case PTT_GEN_ERR: /* ascii data */
- {
- char *buf;
- buf = malloc (ntohs (t->tag_len) + 1);
- memset (buf, 0, ntohs (t->tag_len) + 1);
- strncpy (buf, (char *) (t + 1), ntohs (t->tag_len));
-// buf[ntohs (t->tag_len)] = '\0';
- printer (arg, " data (UTF-8): %s", buf);
- free (buf);
- break;
- }
-
- case PTT_HOST_UNIQ:
- case PTT_AC_COOKIE:
- case PTT_RELAY_SID:
- printer (arg, " data (bin): %.*B", ntohs (t->tag_len), (char *) (t + 1));
- break;
-
- default:
- printer (arg, " unrecognized data");
- }
-}
-
-/*
- * poe_logit - does the hard work for poe_fatal et al.
- */
-static void
-poe_logit (struct session *ses,int level, char *fmt, va_list args)
-{
- int n;
- char buf[256];
-
- n = vpoe_slprintf (buf, sizeof (buf), fmt, args);
- syslog (level, "%s", buf);
- if (log_to_fd >= 0 && (level != LOG_DEBUG || ses->opt_debug)) {
- if (buf[n - 1] != '\n')
- buf[n++] = '\n';
- if (write (log_to_fd, buf, n) != n)
- log_to_fd = -1;
- }
-}
-
-/*
- * poe_fatal - log an poe_error message and poe_die horribly.
- */
-void
-poe_fatal (struct session *ses, char *fmt,...)
-{
- va_list pvar;
-
- va_start (pvar, fmt);
-
- poe_logit (ses,LOG_ERR, fmt, pvar);
- va_end (pvar);
-
- poe_die(1); /* as promised */
-}
-
-/*
- * poe_error - log an poe_error message.
- */
-void
-poe_error (struct session *ses,char *fmt,...)
-{
- va_list pvar;
-
- va_start (pvar, fmt);
-
- poe_logit (ses,LOG_ERR, fmt, pvar);
- va_end (pvar);
-}
-
-/*
- * poe_warn - log a poe_warning message.
- */
-void
-poe_warn (struct session *ses,char *fmt,...)
-{
- va_list pvar;
-
- va_start (pvar, fmt);
-
- poe_logit (ses,LOG_WARNING, fmt, pvar);
- va_end (pvar);
-}
-
-#if 0
-/*
- * poe_notice - log a poe_notice-level message.
- */
-void
-poe_notice (int log_to_fd ,char *fmt,...)
-{
- va_list pvar;
-
- va_start (pvar, fmt);
-
- poe_logit (log_to_fd,LOG_NOTICE, fmt, pvar);
- va_end (pvar);
-}
-
-#endif
-/*
- * poe_info - log an poe_informational message.
- */
-void
-poe_info (struct session *ses,char *fmt,...)
-{
- va_list pvar;
-
- va_start (pvar, fmt);
-
- poe_logit (ses,LOG_INFO, fmt, pvar);
- va_end (pvar);
-}
-
-/*
- * poe_dbglog - log a debug message.
- */
-void
-poe_dbglog (struct session *ses ,char *fmt,...)
-{
- va_list pvar;
-
- va_start (pvar, fmt);
-
- poe_logit (ses,LOG_DEBUG, fmt, pvar);
- va_end (pvar);
-}
-
-/*
- * Create a file containing our process ID.
- */
-void
-poe_create_pidfile (struct session *ses)
-{
- FILE *pidfile;
-
- sprintf (pidfilename, "%s%s.pid", _PATH_VARRUN, "pppoed");
- if ((pidfile = fopen (pidfilename, "w")) != NULL) {
- fprintf (pidfile, "%d\n", getpid ());
- (void) fclose (pidfile);
- }
- else {
- poe_error (ses,"Failed to create pid file %s: %m", pidfilename);
- pidfilename[0] = 0;
- }
-}
-
-/*
- * detach - detach us from the controlling terminal.
- */
-void
-poe_detach (struct session *ses)
-{
- if (ses->detached)
- return;
-
- if ((daemon (0, 0)) < 0) {
- poe_error (ses,"Couldn't detach (daemon failed: %m)");
-#if 0
- poe_die (1); /* or just return? */
-#endif
- }
- ses->detached = 1;
- ses->log_to_fd = -1;
- /* update pid files if they have been written already */
- if (pidfilename[0])
- poe_create_pidfile (ses);
-}
-
-/*
- * cleanup - restore anything which needs to be restored before we exit
- */
-/* ARGSUSED */
-static void
-cleanup ()
-{
- if (pidfilename[0] != 0 && unlink (pidfilename) < 0 && errno != ENOENT)
- syslog (LOG_INFO,"unable to delete pid file ");
- pidfilename[0] = 0;
-}
-
-/*
- * poe_die - clean up state and exit with the specified status.
- */
-void
-poe_die (int status)
-{
- cleanup ();
- syslog (LOG_INFO, "Exit.");
- exit (status);
-}
projects / ppp.git / blobdiff