/* * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996, 1997 * 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: (1) source code distributions * retain the above copyright notice and this paragraph in its entirety, (2) * distributions including binary code include the above copyright notice and * this paragraph in its entirety in the documentation or other materials * provided with the distribution, and (3) all advertising materials mentioning * features or use of this software display the following acknowledgement: * ``This product includes software developed by the University of California, * Lawrence Berkeley Laboratory and its contributors.'' 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. */ #ifndef lint static const char rcsid[] = "@(#) $Header: /tcpdump/master/tcpdump/util.c,v 1.62 1999-12-15 06:58:03 fenner Exp $ (LBL)"; #endif #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include #include #include #ifdef HAVE_FCNTL_H #include #endif #ifdef HAVE_MALLOC_H #include #endif #include #include #if __STDC__ #include #else #include #endif #include #include #ifdef TIME_WITH_SYS_TIME #include #endif #include #include "interface.h" /* * Print out a filename (or other ascii string). * If ep is NULL, assume no truncation check is needed. * Return true if truncated. */ int fn_print(register const u_char *s, register const u_char *ep) { register int ret; register u_char c; ret = 1; /* assume truncated */ while (ep == NULL || s < ep) { c = *s++; if (c == '\0') { ret = 0; break; } if (!isascii(c)) { c = toascii(c); putchar('M'); putchar('-'); } if (!isprint(c)) { c ^= 0x40; /* DEL to ?, others to alpha */ putchar('^'); } putchar(c); } return(ret); } /* * Print out a counted filename (or other ascii string). * If ep is NULL, assume no truncation check is needed. * Return true if truncated. */ int fn_printn(register const u_char *s, register u_int n, register const u_char *ep) { register int ret; register u_char c; ret = 1; /* assume truncated */ while (ep == NULL || s < ep) { if (n-- <= 0) { ret = 0; break; } c = *s++; if (!isascii(c)) { c = toascii(c); putchar('M'); putchar('-'); } if (!isprint(c)) { c ^= 0x40; /* DEL to ?, others to alpha */ putchar('^'); } putchar(c); } return(ret); } /* * Print the timestamp */ void ts_print(register const struct timeval *tvp) { register int s; if (tflag > 0) { /* Default */ s = (tvp->tv_sec + thiszone) % 86400; (void)printf("%02d:%02d:%02d.%06u ", s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec); } else if (tflag < 0) { if (tflag < -1) { static unsigned b_sec; static unsigned b_usec; if (b_sec == 0) { printf("000000 "); } else { int d_usec = tvp->tv_usec - b_usec; int d_sec = tvp->tv_sec - b_sec; while (d_usec < 0) { d_usec += 1000000; d_sec--; } if (d_sec) printf("%d. ", d_sec); printf("%06d ", d_usec); } b_sec = tvp->tv_sec; b_usec = tvp->tv_usec; } else { /* Unix timeval style */ (void)printf("%u.%06u ", (u_int32_t)tvp->tv_sec, (u_int32_t)tvp->tv_usec); } } } /* * Print a relative number of seconds (e.g. hold time, prune timer) * in the form 5m1s. This does no truncation, so 32230861 seconds * is represented as 1y1w1d1h1m1s. */ void relts_print(int secs) { static char *lengths[]={"y","w","d","h","m","s"}; static int seconds[]={31536000,604800,86400,3600,60,1}; char **l = lengths; int *s = seconds; if (secs == 0) { (void)printf("0s"); return; } while (secs) { if (secs >= *s) { (void)printf("%d%s", secs / *s, *l); secs -= (secs / *s) * *s; } s++; l++; } } /* * Convert a token value to a string; use "fmt" if not found. */ const char * tok2str(register const struct tok *lp, register const char *fmt, register int v) { static char buf[128]; while (lp->s != NULL) { if (lp->v == v) return (lp->s); ++lp; } if (fmt == NULL) fmt = "#%d"; (void)sprintf(buf, fmt, v); return (buf); } /* VARARGS */ __dead void #if __STDC__ error(const char *fmt, ...) #else error(fmt, va_alist) const char *fmt; va_dcl #endif { va_list ap; (void)fprintf(stderr, "%s: ", program_name); #if __STDC__ va_start(ap, fmt); #else va_start(ap); #endif (void)vfprintf(stderr, fmt, ap); va_end(ap); if (*fmt) { fmt += strlen(fmt); if (fmt[-1] != '\n') (void)fputc('\n', stderr); } exit(1); /* NOTREACHED */ } /* VARARGS */ void #if __STDC__ warning(const char *fmt, ...) #else warning(fmt, va_alist) const char *fmt; va_dcl #endif { va_list ap; (void)fprintf(stderr, "%s: WARNING: ", program_name); #if __STDC__ va_start(ap, fmt); #else va_start(ap); #endif (void)vfprintf(stderr, fmt, ap); va_end(ap); if (*fmt) { fmt += strlen(fmt); if (fmt[-1] != '\n') (void)fputc('\n', stderr); } } /* * Copy arg vector into a new buffer, concatenating arguments with spaces. */ char * copy_argv(register char **argv) { register char **p; register u_int len = 0; char *buf; char *src, *dst; p = argv; if (*p == 0) return 0; while (*p) len += strlen(*p++) + 1; buf = (char *)malloc(len); if (buf == NULL) error("copy_argv: malloc"); p = argv; dst = buf; while ((src = *p++) != NULL) { while ((*dst++ = *src++) != '\0') ; dst[-1] = ' '; } dst[-1] = '\0'; return buf; } char * read_infile(char *fname) { register int fd, cc; register char *cp; struct stat buf; fd = open(fname, O_RDONLY); if (fd < 0) error("can't open %s: %s", fname, pcap_strerror(errno)); if (fstat(fd, &buf) < 0) error("can't stat %s: %s", fname, pcap_strerror(errno)); cp = malloc((u_int)buf.st_size + 1); cc = read(fd, cp, (int)buf.st_size); if (cc < 0) error("read %s: %s", fname, pcap_strerror(errno)); if (cc != buf.st_size) error("short read %s (%d != %d)", fname, cc, (int)buf.st_size); cp[(int)buf.st_size] = '\0'; return (cp); }