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Diffstat (limited to 'util-print.c')
-rw-r--r-- | util-print.c | 938 |
1 files changed, 938 insertions, 0 deletions
diff --git a/util-print.c b/util-print.c new file mode 100644 index 00000000..5db042a3 --- /dev/null +++ b/util-print.c @@ -0,0 +1,938 @@ +/* + * 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. + */ + +/* + * txtproto_print() derived from original code by Hannes Gredler + * (hannes@juniper.net): + * + * 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, and (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. + * 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. + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <netdissect-stdinc.h> + +#include <sys/stat.h> + +#ifdef HAVE_FCNTL_H +#include <fcntl.h> +#endif +#include <ctype.h> +#include <stdio.h> +#include <stdarg.h> +#include <stdlib.h> +#include <string.h> + +#include "netdissect.h" +#include "ascii_strcasecmp.h" +#include "timeval-operations.h" + +int32_t thiszone; /* seconds offset from gmt to local time */ +/* invalid string to print '(invalid)' for malformed or corrupted packets */ +const char istr[] = " (invalid)"; + +/* + * timestamp display buffer size, the biggest size of both formats is needed + * sizeof("0000000000.000000000") > sizeof("00:00:00.000000000") + */ +#define TS_BUF_SIZE sizeof("0000000000.000000000") + +#define TOKBUFSIZE 128 + +/* + * Print out a character, filtering out the non-printable ones + */ +void +fn_print_char(netdissect_options *ndo, u_char c) +{ + if (!ND_ISASCII(c)) { + c = ND_TOASCII(c); + ND_PRINT((ndo, "M-")); + } + if (!ND_ISPRINT(c)) { + c ^= 0x40; /* DEL to ?, others to alpha */ + ND_PRINT((ndo, "^")); + } + ND_PRINT((ndo, "%c", c)); +} + +/* + * Print out a null-terminated filename (or other ascii string). + * If ep is NULL, assume no truncation check is needed. + * Return true if truncated. + * Stop at ep (if given) or before the null char, whichever is first. + */ +int +fn_print(netdissect_options *ndo, + 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 (!ND_ISASCII(c)) { + c = ND_TOASCII(c); + ND_PRINT((ndo, "M-")); + } + if (!ND_ISPRINT(c)) { + c ^= 0x40; /* DEL to ?, others to alpha */ + ND_PRINT((ndo, "^")); + } + ND_PRINT((ndo, "%c", c)); + } + return(ret); +} + +/* + * Print out a null-terminated filename (or other ascii string) from + * a fixed-length buffer. + * If ep is NULL, assume no truncation check is needed. + * Return the number of bytes of string processed, including the + * terminating null, if not truncated. Return 0 if truncated. + */ +u_int +fn_printztn(netdissect_options *ndo, + register const u_char *s, register u_int n, register const u_char *ep) +{ + register u_int bytes; + register u_char c; + + bytes = 0; + for (;;) { + if (n == 0 || (ep != NULL && s >= ep)) { + /* + * Truncated. This includes "no null before we + * got to the end of the fixed-length buffer". + * + * XXX - BOOTP says "null-terminated", which + * means the maximum length of the string, in + * bytes, is 1 less than the size of the buffer, + * as there must always be a terminating null. + */ + bytes = 0; + break; + } + + c = *s++; + bytes++; + n--; + if (c == '\0') { + /* End of string */ + break; + } + if (!ND_ISASCII(c)) { + c = ND_TOASCII(c); + ND_PRINT((ndo, "M-")); + } + if (!ND_ISPRINT(c)) { + c ^= 0x40; /* DEL to ?, others to alpha */ + ND_PRINT((ndo, "^")); + } + ND_PRINT((ndo, "%c", c)); + } + return(bytes); +} + +/* + * Print out a counted filename (or other ascii string). + * If ep is NULL, assume no truncation check is needed. + * Return true if truncated. + * Stop at ep (if given) or after n bytes, whichever is first. + */ +int +fn_printn(netdissect_options *ndo, + register const u_char *s, register u_int n, register const u_char *ep) +{ + register u_char c; + + while (n > 0 && (ep == NULL || s < ep)) { + n--; + c = *s++; + if (!ND_ISASCII(c)) { + c = ND_TOASCII(c); + ND_PRINT((ndo, "M-")); + } + if (!ND_ISPRINT(c)) { + c ^= 0x40; /* DEL to ?, others to alpha */ + ND_PRINT((ndo, "^")); + } + ND_PRINT((ndo, "%c", c)); + } + return (n == 0) ? 0 : 1; +} + +/* + * Print out a null-padded filename (or other ascii string). + * If ep is NULL, assume no truncation check is needed. + * Return true if truncated. + * Stop at ep (if given) or after n bytes or before the null char, + * whichever is first. + */ +int +fn_printzp(netdissect_options *ndo, + 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 (n > 0 && (ep == NULL || s < ep)) { + n--; + c = *s++; + if (c == '\0') { + ret = 0; + break; + } + if (!ND_ISASCII(c)) { + c = ND_TOASCII(c); + ND_PRINT((ndo, "M-")); + } + if (!ND_ISPRINT(c)) { + c ^= 0x40; /* DEL to ?, others to alpha */ + ND_PRINT((ndo, "^")); + } + ND_PRINT((ndo, "%c", c)); + } + return (n == 0) ? 0 : ret; +} + +/* + * Format the timestamp + */ +static char * +ts_format(netdissect_options *ndo +#ifndef HAVE_PCAP_SET_TSTAMP_PRECISION +_U_ +#endif +, int sec, int usec, char *buf) +{ + const char *format; + +#ifdef HAVE_PCAP_SET_TSTAMP_PRECISION + switch (ndo->ndo_tstamp_precision) { + + case PCAP_TSTAMP_PRECISION_MICRO: + format = "%02d:%02d:%02d.%06u"; + break; + + case PCAP_TSTAMP_PRECISION_NANO: + format = "%02d:%02d:%02d.%09u"; + break; + + default: + format = "%02d:%02d:%02d.{unknown}"; + break; + } +#else + format = "%02d:%02d:%02d.%06u"; +#endif + + snprintf(buf, TS_BUF_SIZE, format, + sec / 3600, (sec % 3600) / 60, sec % 60, usec); + + return buf; +} + +/* + * Format the timestamp - Unix timeval style + */ +static char * +ts_unix_format(netdissect_options *ndo +#ifndef HAVE_PCAP_SET_TSTAMP_PRECISION +_U_ +#endif +, int sec, int usec, char *buf) +{ + const char *format; + +#ifdef HAVE_PCAP_SET_TSTAMP_PRECISION + switch (ndo->ndo_tstamp_precision) { + + case PCAP_TSTAMP_PRECISION_MICRO: + format = "%u.%06u"; + break; + + case PCAP_TSTAMP_PRECISION_NANO: + format = "%u.%09u"; + break; + + default: + format = "%u.{unknown}"; + break; + } +#else + format = "%u.%06u"; +#endif + + snprintf(buf, TS_BUF_SIZE, format, + (unsigned)sec, (unsigned)usec); + + return buf; +} + +/* + * Print the timestamp + */ +void +ts_print(netdissect_options *ndo, + register const struct timeval *tvp) +{ + register int s; + struct tm *tm; + time_t Time; + char buf[TS_BUF_SIZE]; + static struct timeval tv_ref; + struct timeval tv_result; + int negative_offset; + int nano_prec; + + switch (ndo->ndo_tflag) { + + case 0: /* Default */ + s = (tvp->tv_sec + thiszone) % 86400; + ND_PRINT((ndo, "%s ", ts_format(ndo, s, tvp->tv_usec, buf))); + break; + + case 1: /* No time stamp */ + break; + + case 2: /* Unix timeval style */ + ND_PRINT((ndo, "%s ", ts_unix_format(ndo, + tvp->tv_sec, tvp->tv_usec, buf))); + break; + + case 3: /* Microseconds/nanoseconds since previous packet */ + case 5: /* Microseconds/nanoseconds since first packet */ +#ifdef HAVE_PCAP_SET_TSTAMP_PRECISION + switch (ndo->ndo_tstamp_precision) { + case PCAP_TSTAMP_PRECISION_MICRO: + nano_prec = 0; + break; + case PCAP_TSTAMP_PRECISION_NANO: + nano_prec = 1; + break; + default: + nano_prec = 0; + break; + } +#else + nano_prec = 0; +#endif + if (!(netdissect_timevalisset(&tv_ref))) + tv_ref = *tvp; /* set timestamp for first packet */ + + negative_offset = netdissect_timevalcmp(tvp, &tv_ref, <); + if (negative_offset) + netdissect_timevalsub(&tv_ref, tvp, &tv_result, nano_prec); + else + netdissect_timevalsub(tvp, &tv_ref, &tv_result, nano_prec); + + ND_PRINT((ndo, (negative_offset ? "-" : " "))); + + ND_PRINT((ndo, "%s ", ts_format(ndo, + tv_result.tv_sec, tv_result.tv_usec, buf))); + + if (ndo->ndo_tflag == 3) + tv_ref = *tvp; /* set timestamp for previous packet */ + break; + + case 4: /* Default + Date */ + s = (tvp->tv_sec + thiszone) % 86400; + Time = (tvp->tv_sec + thiszone) - s; + tm = gmtime (&Time); + if (!tm) + ND_PRINT((ndo, "Date fail ")); + else + ND_PRINT((ndo, "%04d-%02d-%02d %s ", + tm->tm_year+1900, tm->tm_mon+1, tm->tm_mday, + ts_format(ndo, s, tvp->tv_usec, buf))); + break; + } +} + +/* + * Print an unsigned 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 +unsigned_relts_print(netdissect_options *ndo, + uint32_t secs) +{ + static const char *lengths[] = {"y", "w", "d", "h", "m", "s"}; + static const u_int seconds[] = {31536000, 604800, 86400, 3600, 60, 1}; + const char **l = lengths; + const u_int *s = seconds; + + if (secs == 0) { + ND_PRINT((ndo, "0s")); + return; + } + while (secs > 0) { + if (secs >= *s) { + ND_PRINT((ndo, "%d%s", secs / *s, *l)); + secs -= (secs / *s) * *s; + } + s++; + l++; + } +} + +/* + * Print a signed 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 +signed_relts_print(netdissect_options *ndo, + int32_t secs) +{ + if (secs < 0) { + ND_PRINT((ndo, "-")); + if (secs == INT32_MIN) { + /* + * -2^31; you can't fit its absolute value into + * a 32-bit signed integer. + * + * Just directly pass said absolute value to + * unsigned_relts_print() directly. + * + * (XXX - does ISO C guarantee that -(-2^n), + * when calculated and cast to an n-bit unsigned + * integer type, will have the value 2^n?) + */ + unsigned_relts_print(ndo, 2147483648U); + } else { + /* + * We now know -secs will fit into an int32_t; + * negate it and pass that to unsigned_relts_print(). + */ + unsigned_relts_print(ndo, -secs); + } + return; + } + unsigned_relts_print(ndo, secs); +} + +/* + * this is a generic routine for printing unknown data; + * we pass on the linefeed plus indentation string to + * get a proper output - returns 0 on error + */ + +int +print_unknown_data(netdissect_options *ndo, const u_char *cp,const char *ident,int len) +{ + if (len < 0) { + ND_PRINT((ndo,"%sDissector error: print_unknown_data called with negative length", + ident)); + return(0); + } + if (ndo->ndo_snapend - cp < len) + len = ndo->ndo_snapend - cp; + if (len < 0) { + ND_PRINT((ndo,"%sDissector error: print_unknown_data called with pointer past end of packet", + ident)); + return(0); + } + hex_print(ndo, ident,cp,len); + return(1); /* everything is ok */ +} + +/* + * Convert a token value to a string; use "fmt" if not found. + */ +const char * +tok2strbuf(register const struct tok *lp, register const char *fmt, + register u_int v, char *buf, size_t bufsize) +{ + if (lp != NULL) { + while (lp->s != NULL) { + if (lp->v == v) + return (lp->s); + ++lp; + } + } + if (fmt == NULL) + fmt = "#%d"; + + (void)snprintf(buf, bufsize, fmt, v); + return (const char *)buf; +} + +/* + * 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 u_int v) +{ + static char buf[4][TOKBUFSIZE]; + static int idx = 0; + char *ret; + + ret = buf[idx]; + idx = (idx+1) & 3; + return tok2strbuf(lp, fmt, v, ret, sizeof(buf[0])); +} + +/* + * Convert a bit token value to a string; use "fmt" if not found. + * this is useful for parsing bitfields, the output strings are seperated + * if the s field is positive. + */ +static char * +bittok2str_internal(register const struct tok *lp, register const char *fmt, + register u_int v, const char *sep) +{ + static char buf[256]; /* our stringbuffer */ + int buflen=0; + register u_int rotbit; /* this is the bit we rotate through all bitpositions */ + register u_int tokval; + const char * sepstr = ""; + + while (lp != NULL && lp->s != NULL) { + tokval=lp->v; /* load our first value */ + rotbit=1; + while (rotbit != 0) { + /* + * lets AND the rotating bit with our token value + * and see if we have got a match + */ + if (tokval == (v&rotbit)) { + /* ok we have found something */ + buflen+=snprintf(buf+buflen, sizeof(buf)-buflen, "%s%s", + sepstr, lp->s); + sepstr = sep; + break; + } + rotbit=rotbit<<1; /* no match - lets shift and try again */ + } + lp++; + } + + if (buflen == 0) + /* bummer - lets print the "unknown" message as advised in the fmt string if we got one */ + (void)snprintf(buf, sizeof(buf), fmt == NULL ? "#%08x" : fmt, v); + return (buf); +} + +/* + * Convert a bit token value to a string; use "fmt" if not found. + * this is useful for parsing bitfields, the output strings are not seperated. + */ +char * +bittok2str_nosep(register const struct tok *lp, register const char *fmt, + register u_int v) +{ + return (bittok2str_internal(lp, fmt, v, "")); +} + +/* + * Convert a bit token value to a string; use "fmt" if not found. + * this is useful for parsing bitfields, the output strings are comma seperated. + */ +char * +bittok2str(register const struct tok *lp, register const char *fmt, + register u_int v) +{ + return (bittok2str_internal(lp, fmt, v, ", ")); +} + +/* + * Convert a value to a string using an array; the macro + * tok2strary() in <netdissect.h> is the public interface to + * this function and ensures that the second argument is + * correct for bounds-checking. + */ +const char * +tok2strary_internal(register const char **lp, int n, register const char *fmt, + register int v) +{ + static char buf[TOKBUFSIZE]; + + if (v >= 0 && v < n && lp[v] != NULL) + return lp[v]; + if (fmt == NULL) + fmt = "#%d"; + (void)snprintf(buf, sizeof(buf), fmt, v); + return (buf); +} + +/* + * Convert a 32-bit netmask to prefixlen if possible + * the function returns the prefix-len; if plen == -1 + * then conversion was not possible; + */ + +int +mask2plen(uint32_t mask) +{ + uint32_t bitmasks[33] = { + 0x00000000, + 0x80000000, 0xc0000000, 0xe0000000, 0xf0000000, + 0xf8000000, 0xfc000000, 0xfe000000, 0xff000000, + 0xff800000, 0xffc00000, 0xffe00000, 0xfff00000, + 0xfff80000, 0xfffc0000, 0xfffe0000, 0xffff0000, + 0xffff8000, 0xffffc000, 0xffffe000, 0xfffff000, + 0xfffff800, 0xfffffc00, 0xfffffe00, 0xffffff00, + 0xffffff80, 0xffffffc0, 0xffffffe0, 0xfffffff0, + 0xfffffff8, 0xfffffffc, 0xfffffffe, 0xffffffff + }; + int prefix_len = 32; + + /* let's see if we can transform the mask into a prefixlen */ + while (prefix_len >= 0) { + if (bitmasks[prefix_len] == mask) + break; + prefix_len--; + } + return (prefix_len); +} + +int +mask62plen(const u_char *mask) +{ + u_char bitmasks[9] = { + 0x00, + 0x80, 0xc0, 0xe0, 0xf0, + 0xf8, 0xfc, 0xfe, 0xff + }; + int byte; + int cidr_len = 0; + + for (byte = 0; byte < 16; byte++) { + u_int bits; + + for (bits = 0; bits < (sizeof (bitmasks) / sizeof (bitmasks[0])); bits++) { + if (mask[byte] == bitmasks[bits]) { + cidr_len += bits; + break; + } + } + + if (mask[byte] != 0xff) + break; + } + return (cidr_len); +} + +/* + * Routine to print out information for text-based protocols such as FTP, + * HTTP, SMTP, RTSP, SIP, .... + */ +#define MAX_TOKEN 128 + +/* + * Fetch a token from a packet, starting at the specified index, + * and return the length of the token. + * + * Returns 0 on error; yes, this is indistinguishable from an empty + * token, but an "empty token" isn't a valid token - it just means + * either a space character at the beginning of the line (this + * includes a blank line) or no more tokens remaining on the line. + */ +static int +fetch_token(netdissect_options *ndo, const u_char *pptr, u_int idx, u_int len, + u_char *tbuf, size_t tbuflen) +{ + size_t toklen = 0; + + for (; idx < len; idx++) { + if (!ND_TTEST(*(pptr + idx))) { + /* ran past end of captured data */ + return (0); + } + if (!isascii(*(pptr + idx))) { + /* not an ASCII character */ + return (0); + } + if (isspace(*(pptr + idx))) { + /* end of token */ + break; + } + if (!isprint(*(pptr + idx))) { + /* not part of a command token or response code */ + return (0); + } + if (toklen + 2 > tbuflen) { + /* no room for this character and terminating '\0' */ + return (0); + } + tbuf[toklen] = *(pptr + idx); + toklen++; + } + if (toklen == 0) { + /* no token */ + return (0); + } + tbuf[toklen] = '\0'; + + /* + * Skip past any white space after the token, until we see + * an end-of-line (CR or LF). + */ + for (; idx < len; idx++) { + if (!ND_TTEST(*(pptr + idx))) { + /* ran past end of captured data */ + break; + } + if (*(pptr + idx) == '\r' || *(pptr + idx) == '\n') { + /* end of line */ + break; + } + if (!isascii(*(pptr + idx)) || !isprint(*(pptr + idx))) { + /* not a printable ASCII character */ + break; + } + if (!isspace(*(pptr + idx))) { + /* beginning of next token */ + break; + } + } + return (idx); +} + +/* + * Scan a buffer looking for a line ending - LF or CR-LF. + * Return the index of the character after the line ending or 0 if + * we encounter a non-ASCII or non-printable character or don't find + * the line ending. + */ +static u_int +print_txt_line(netdissect_options *ndo, const char *protoname, + const char *prefix, const u_char *pptr, u_int idx, u_int len) +{ + u_int startidx; + u_int linelen; + + startidx = idx; + while (idx < len) { + ND_TCHECK(*(pptr+idx)); + if (*(pptr+idx) == '\n') { + /* + * LF without CR; end of line. + * Skip the LF and print the line, with the + * exception of the LF. + */ + linelen = idx - startidx; + idx++; + goto print; + } else if (*(pptr+idx) == '\r') { + /* CR - any LF? */ + if ((idx+1) >= len) { + /* not in this packet */ + return (0); + } + ND_TCHECK(*(pptr+idx+1)); + if (*(pptr+idx+1) == '\n') { + /* + * CR-LF; end of line. + * Skip the CR-LF and print the line, with + * the exception of the CR-LF. + */ + linelen = idx - startidx; + idx += 2; + goto print; + } + + /* + * CR followed by something else; treat this + * as if it were binary data, and don't print + * it. + */ + return (0); + } else if (!isascii(*(pptr+idx)) || + (!isprint(*(pptr+idx)) && *(pptr+idx) != '\t')) { + /* + * Not a printable ASCII character and not a tab; + * treat this as if it were binary data, and + * don't print it. + */ + return (0); + } + idx++; + } + + /* + * All printable ASCII, but no line ending after that point + * in the buffer; treat this as if it were truncated. + */ +trunc: + linelen = idx - startidx; + ND_PRINT((ndo, "%s%.*s[!%s]", prefix, (int)linelen, pptr + startidx, + protoname)); + return (0); + +print: + ND_PRINT((ndo, "%s%.*s", prefix, (int)linelen, pptr + startidx)); + return (idx); +} + +void +txtproto_print(netdissect_options *ndo, const u_char *pptr, u_int len, + const char *protoname, const char **cmds, u_int flags) +{ + u_int idx, eol; + u_char token[MAX_TOKEN+1]; + const char *cmd; + int is_reqresp = 0; + const char *pnp; + + if (cmds != NULL) { + /* + * This protocol has more than just request and + * response lines; see whether this looks like a + * request or response. + */ + idx = fetch_token(ndo, pptr, 0, len, token, sizeof(token)); + if (idx != 0) { + /* Is this a valid request name? */ + while ((cmd = *cmds++) != NULL) { + if (ascii_strcasecmp((const char *)token, cmd) == 0) { + /* Yes. */ + is_reqresp = 1; + break; + } + } + + /* + * No - is this a valid response code (3 digits)? + * + * Is this token the response code, or is the next + * token the response code? + */ + if (flags & RESP_CODE_SECOND_TOKEN) { + /* + * Next token - get it. + */ + idx = fetch_token(ndo, pptr, idx, len, token, + sizeof(token)); + } + if (idx != 0) { + if (isdigit(token[0]) && isdigit(token[1]) && + isdigit(token[2]) && token[3] == '\0') { + /* Yes. */ + is_reqresp = 1; + } + } + } + } else { + /* + * This protocol has only request and response lines + * (e.g., FTP, where all the data goes over a + * different connection); assume the payload is + * a request or response. + */ + is_reqresp = 1; + } + + /* Capitalize the protocol name */ + for (pnp = protoname; *pnp != '\0'; pnp++) + ND_PRINT((ndo, "%c", toupper((u_char)*pnp))); + + if (is_reqresp) { + /* + * In non-verbose mode, just print the protocol, followed + * by the first line as the request or response info. + * + * In verbose mode, print lines as text until we run out + * of characters or see something that's not a + * printable-ASCII line. + */ + if (ndo->ndo_vflag) { + /* + * We're going to print all the text lines in the + * request or response; just print the length + * on the first line of the output. + */ + ND_PRINT((ndo, ", length: %u", len)); + for (idx = 0; + idx < len && (eol = print_txt_line(ndo, protoname, "\n\t", pptr, idx, len)) != 0; + idx = eol) + ; + } else { + /* + * Just print the first text line. + */ + print_txt_line(ndo, protoname, ": ", pptr, 0, len); + } + } +} + +void +safeputs(netdissect_options *ndo, + const u_char *s, const u_int maxlen) +{ + u_int idx = 0; + + while (*s && idx < maxlen) { + safeputchar(ndo, *s); + idx++; + s++; + } +} + +void +safeputchar(netdissect_options *ndo, + const u_char c) +{ + ND_PRINT((ndo, (c < 0x80 && ND_ISPRINT(c)) ? "%c" : "\\0x%02x", c)); +} + +#ifdef LBL_ALIGN +/* + * Some compilers try to optimize memcpy(), using the alignment constraint + * on the argument pointer type. by using this function, we try to avoid the + * optimization. + */ +void +unaligned_memcpy(void *p, const void *q, size_t l) +{ + memcpy(p, q, l); +} + +/* As with memcpy(), so with memcmp(). */ +int +unaligned_memcmp(const void *p, const void *q, size_t l) +{ + return (memcmp(p, q, l)); +} +#endif + |