/*
* utils.c - various utility functions used in pppd.
*
- * Copyright (c) 1999 The Australian National University.
- * All rights reserved.
+ * Copyright (c) 1999-2002 Paul Mackerras. All rights reserved.
*
- * Redistribution and use in source and binary forms are permitted
- * provided that the above copyright 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.
+ * 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. The name(s) of the authors of this software must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission.
+ *
+ * 3. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by Paul Mackerras
+ * <paulus@samba.org>".
+ *
+ * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
+ * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
+ * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
-#ifndef lint
-static char rcsid[] = "$Id: utils.c,v 1.2 1999/04/16 11:34:27 paulus Exp $";
-#endif
+
+#define RCSID "$Id: utils.c,v 1.25 2008/06/03 12:06:37 paulus Exp $"
#include <stdio.h>
#include <ctype.h>
#include <fcntl.h>
#include <syslog.h>
#include <netdb.h>
+#include <time.h>
#include <utmp.h>
#include <pwd.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <netinet/in.h>
+#ifdef SVR4
+#include <sys/mkdev.h>
+#endif
#include "pppd.h"
+#include "fsm.h"
+#include "lcp.h"
+
+
+#if defined(SUNOS4)
+extern char *strerror();
+#endif
-static void pr_log __P((void *, char *, ...));
static void logit __P((int, char *, va_list));
+static void log_write __P((int, char *));
static void vslp_printer __P((void *, char *, ...));
-static void format_packet __P((u_char *, int, void (*) (void *, char *, ...),
- void *));
+static void format_packet __P((u_char *, int, printer_func, void *));
struct buffer_info {
char *ptr;
/*
* slprintf - format a message into a buffer. Like sprintf except we
* also specify the length of the output buffer, and we handle
- * %r (recursive format), %m (error message), %v (visible string),
+ * %m (error message), %v (visible string),
* %q (quoted string), %t (current time) and %I (IP address) formats.
* Doesn't do floating-point formats.
* Returns the number of chars put into buf.
va_list args;
int n;
-#if __STDC__
+#if defined(__STDC__)
va_start(args, fmt);
#else
char *buf;
u_int32_t ip;
static char hexchars[] = "0123456789abcdef";
struct buffer_info bufinfo;
+ int termch;
buf0 = buf;
--buflen;
if (*fmt == 0)
break;
c = *++fmt;
- width = prec = 0;
+ width = 0;
+ prec = -1;
fillch = ' ';
if (c == '0') {
fillch = '0';
prec = va_arg(args, int);
c = *++fmt;
} else {
+ prec = 0;
while (isdigit(c)) {
prec = prec * 10 + c - '0';
c = *++fmt;
neg = 0;
++fmt;
switch (c) {
+ case 'l':
+ c = *fmt++;
+ switch (c) {
+ case 'd':
+ val = va_arg(args, long);
+ if (val < 0) {
+ neg = 1;
+ val = -val;
+ }
+ base = 10;
+ break;
+ case 'u':
+ val = va_arg(args, unsigned long);
+ base = 10;
+ break;
+ default:
+ OUTCHAR('%');
+ OUTCHAR('l');
+ --fmt; /* so %lz outputs %lz etc. */
+ continue;
+ }
+ break;
case 'd':
i = va_arg(args, int);
if (i < 0) {
val = i;
base = 10;
break;
+ case 'u':
+ val = va_arg(args, unsigned int);
+ base = 10;
+ break;
case 'o':
val = va_arg(args, unsigned int);
base = 8;
(ip >> 16) & 0xff, (ip >> 8) & 0xff, ip & 0xff);
str = num;
break;
- case 'r':
- f = va_arg(args, char *);
-#ifndef __powerpc__
- n = vslprintf(buf, buflen + 1, f, va_arg(args, va_list));
-#else
- /* On the powerpc, a va_list is an array of 1 structure */
- n = vslprintf(buf, buflen + 1, f, va_arg(args, void *));
-#endif
- buf += n;
- buflen -= n;
- continue;
case 't':
time(&t);
str = ctime(&t);
case 'q': /* quoted string */
quoted = c == 'q';
p = va_arg(args, unsigned char *);
- if (fillch == '0' && prec > 0) {
+ if (p == NULL)
+ p = (unsigned char *)"<NULL>";
+ if (fillch == '0' && prec >= 0) {
n = prec;
+ termch = -1; /* matches no unsigned char value */
} else {
- n = strlen((char *)p);
- if (prec > 0 && prec < n)
+ n = buflen;
+ if (prec != -1 && n > prec)
n = prec;
+ termch = 0; /* stop on null byte */
}
while (n > 0 && buflen > 0) {
c = *p++;
+ if (c == termch)
+ break;
--n;
if (!quoted && c >= 0x80) {
OUTCHAR('M');
}
len = num + sizeof(num) - 1 - str;
} else {
- len = strlen(str);
- if (prec > 0 && len > prec)
- len = prec;
+ for (len = 0; len < buflen && (prec == -1 || len < prec); ++len)
+ if (str[len] == 0)
+ break;
}
if (width > 0) {
if (width > buflen)
va_list pvar;
struct buffer_info *bi;
-#if __STDC__
+#if defined(__STDC__)
va_start(pvar, fmt);
#else
void *arg;
bi->len -= n;
}
+#ifdef unused
/*
* log_packet - format a packet and log it.
*/
-char line[256]; /* line to be logged accumulated here */
-char *linep;
-
void
log_packet(p, len, prefix, level)
u_char *p;
char *prefix;
int level;
{
- strlcpy(line, prefix, sizeof(line));
- linep = line + strlen(line);
- format_packet(p, len, pr_log, NULL);
- if (linep != line)
- syslog(level, "%s", line);
+ init_pr_log(prefix, level);
+ format_packet(p, len, pr_log, &level);
+ end_pr_log();
}
+#endif /* unused */
/*
* format_packet - make a readable representation of a packet,
format_packet(p, len, printer, arg)
u_char *p;
int len;
- void (*printer) __P((void *, char *, ...));
+ printer_func printer;
void *arg;
{
int i, n;
printer(arg, "%.*B", len, p);
}
-static void
+/*
+ * init_pr_log, end_pr_log - initialize and finish use of pr_log.
+ */
+
+static char line[256]; /* line to be logged accumulated here */
+static char *linep; /* current pointer within line */
+static int llevel; /* level for logging */
+
+void
+init_pr_log(prefix, level)
+ const char *prefix;
+ int level;
+{
+ linep = line;
+ if (prefix != NULL) {
+ strlcpy(line, prefix, sizeof(line));
+ linep = line + strlen(line);
+ }
+ llevel = level;
+}
+
+void
+end_pr_log()
+{
+ if (linep != line) {
+ *linep = 0;
+ log_write(llevel, line);
+ }
+}
+
+/*
+ * pr_log - printer routine for outputting to syslog
+ */
+void
pr_log __V((void *arg, char *fmt, ...))
{
- int n;
- va_list pvar;
- char buf[256];
+ int l, n;
+ va_list pvar;
+ char *p, *eol;
+ char buf[256];
-#if __STDC__
- va_start(pvar, fmt);
+#if defined(__STDC__)
+ va_start(pvar, fmt);
#else
- void *arg;
- char *fmt;
- va_start(pvar);
- arg = va_arg(pvar, void *);
- fmt = va_arg(pvar, char *);
+ void *arg;
+ char *fmt;
+ va_start(pvar);
+ arg = va_arg(pvar, void *);
+ fmt = va_arg(pvar, char *);
#endif
- n = vslprintf(buf, sizeof(buf), fmt, pvar);
- va_end(pvar);
+ n = vslprintf(buf, sizeof(buf), fmt, pvar);
+ va_end(pvar);
+
+ p = buf;
+ eol = strchr(buf, '\n');
+ if (linep != line) {
+ l = (eol == NULL)? n: eol - buf;
+ if (linep + l < line + sizeof(line)) {
+ if (l > 0) {
+ memcpy(linep, buf, l);
+ linep += l;
+ }
+ if (eol == NULL)
+ return;
+ p = eol + 1;
+ eol = strchr(p, '\n');
+ }
+ *linep = 0;
+ log_write(llevel, line);
+ linep = line;
+ }
- if (linep + n + 1 > line + sizeof(line)) {
- syslog(LOG_DEBUG, "%s", line);
- linep = line;
- }
- strlcpy(linep, buf, line + sizeof(line) - linep);
- linep += n;
+ while (eol != NULL) {
+ *eol = 0;
+ log_write(llevel, p);
+ p = eol + 1;
+ eol = strchr(p, '\n');
+ }
+
+ /* assumes sizeof(buf) <= sizeof(line) */
+ l = buf + n - p;
+ if (l > 0) {
+ memcpy(line, p, n);
+ linep = line + l;
+ }
}
/*
print_string(p, len, printer, arg)
char *p;
int len;
- void (*printer) __P((void *, char *, ...));
+ printer_func printer;
void *arg;
{
int c;
printer(arg, "\\t");
break;
default:
- printer(arg, "\\%.3o", c);
+ printer(arg, "\\%.3o", (unsigned char) c);
}
}
}
char *fmt;
va_list args;
{
- int n;
- char buf[256];
+ char buf[1024];
+
+ vslprintf(buf, sizeof(buf), fmt, args);
+ log_write(level, buf);
+}
- n = vslprintf(buf, sizeof(buf), fmt, args);
+static void
+log_write(level, buf)
+ int level;
+ char *buf;
+{
syslog(level, "%s", buf);
if (log_to_fd >= 0 && (level != LOG_DEBUG || debug)) {
- if (buf[n-1] != '\n')
- buf[n++] = '\n';
- if (write(log_to_fd, buf, n) != n)
+ int n = strlen(buf);
+
+ if (n > 0 && buf[n-1] == '\n')
+ --n;
+ if (write(log_to_fd, buf, n) != n
+ || write(log_to_fd, "\n", 1) != 1)
log_to_fd = -1;
}
}
{
va_list pvar;
-#if __STDC__
+#if defined(__STDC__)
va_start(pvar, fmt);
#else
char *fmt;
{
va_list pvar;
-#if __STDC__
+#if defined(__STDC__)
va_start(pvar, fmt);
#else
char *fmt;
logit(LOG_ERR, fmt, pvar);
va_end(pvar);
+ ++error_count;
}
/*
{
va_list pvar;
-#if __STDC__
+#if defined(__STDC__)
va_start(pvar, fmt);
#else
char *fmt;
{
va_list pvar;
-#if __STDC__
+#if defined(__STDC__)
va_start(pvar, fmt);
#else
char *fmt;
{
va_list pvar;
-#if __STDC__
+#if defined(__STDC__)
va_start(pvar, fmt);
#else
char *fmt;
{
va_list pvar;
-#if __STDC__
+#if defined(__STDC__)
va_start(pvar, fmt);
#else
char *fmt;
va_end(pvar);
}
+/*
+ * dump_packet - print out a packet in readable form if it is interesting.
+ * Assumes len >= PPP_HDRLEN.
+ */
+void
+dump_packet(const char *tag, unsigned char *p, int len)
+{
+ int proto;
+
+ if (!debug)
+ return;
+
+ /*
+ * don't print LCP echo request/reply packets if debug <= 1
+ * and the link is up.
+ */
+ proto = (p[2] << 8) + p[3];
+ if (debug <= 1 && unsuccess == 0 && proto == PPP_LCP
+ && len >= PPP_HDRLEN + HEADERLEN) {
+ unsigned char *lcp = p + PPP_HDRLEN;
+ int l = (lcp[2] << 8) + lcp[3];
+
+ if ((lcp[0] == ECHOREQ || lcp[0] == ECHOREP)
+ && l >= HEADERLEN && l <= len - PPP_HDRLEN)
+ return;
+ }
+
+ dbglog("%s %P", tag, p, len);
+}
+
+/*
+ * complete_read - read a full `count' bytes from fd,
+ * unless end-of-file or an error other than EINTR is encountered.
+ */
+ssize_t
+complete_read(int fd, void *buf, size_t count)
+{
+ size_t done;
+ ssize_t nb;
+ char *ptr = buf;
+
+ for (done = 0; done < count; ) {
+ nb = read(fd, ptr, count - done);
+ if (nb < 0) {
+ if (errno == EINTR && !got_sigterm)
+ continue;
+ return -1;
+ }
+ if (nb == 0)
+ break;
+ done += nb;
+ ptr += nb;
+ }
+ return done;
+}
+
/* Procedures for locking the serial device using a lock file. */
#ifndef LOCK_DIR
-#ifdef _linux_
+#ifdef __linux__
#define LOCK_DIR "/var/lock"
#else
#ifdef SVR4
* lock - create a lock file for the named device
*/
int
-lock(char *dev)
+lock(dev)
+ char *dev;
{
#ifdef LOCKLIB
int result;
result = mklock (dev, (void *) 0);
if (result == 0) {
- strlcpy(lock_file, sizeof(lock_file), dev);
+ strlcpy(lock_file, dev, sizeof(lock_file));
return 0;
}
major(sbuf.st_rdev), minor(sbuf.st_rdev));
#else
char *p;
+ char lockdev[MAXPATHLEN];
+
+ if ((p = strstr(dev, "dev/")) != NULL) {
+ dev = p + 4;
+ strncpy(lockdev, dev, MAXPATHLEN-1);
+ lockdev[MAXPATHLEN-1] = 0;
+ while ((p = strrchr(lockdev, '/')) != NULL) {
+ *p = '_';
+ }
+ dev = lockdev;
+ } else
+ if ((p = strrchr(dev, '/')) != NULL)
+ dev = p + 1;
- if ((p = strrchr(dev, '/')) != NULL)
- dev = p + 1;
slprintf(lock_file, sizeof(lock_file), "%s/LCK..%s", LOCK_DIR, dev);
#endif
* between when the parent died and the child rewrote the lockfile).
*/
int
-relock(int pid)
+relock(pid)
+ int pid;
{
#ifdef LOCKLIB
/* XXX is there a way to do this? */
projects / ppp.git / blobdiff