ee67461e56
Local changes: - Update some local modifications to fix build - Synch config.h with upstream as much as possible Changelog: https://git.tcpdump.org/tcpdump/blob/55bc126b0216cfe409b8d6bd378f65679d136ddf:/CHANGES Reviewed by: emaste Obtained from: https://www.tcpdump.org/release/tcpdump-4.99.4.tar.gz Sponsored by: The FreeBSD Foundation
100 lines
2.2 KiB
C
100 lines
2.2 KiB
C
/*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code
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* distributions retain the above copyright notice and this paragraph
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* in its entirety, and (2) distributions including binary code include
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* the above copyright notice and this paragraph in its entirety in
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* the documentation or other materials provided with the distribution.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND
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* WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
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* LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE.
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*/
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/* \summary: Secure Shell (SSH) printer */
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include "netdissect-stdinc.h"
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#include "netdissect-ctype.h"
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#include "netdissect.h"
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#include "extract.h"
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static int
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ssh_print_version(netdissect_options *ndo, const u_char *pptr, u_int len)
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{
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u_int idx = 0;
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if ( GET_U_1(pptr+idx) != 'S' )
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return 0;
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idx++;
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if ( GET_U_1(pptr+idx) != 'S' )
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return 0;
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idx++;
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if ( GET_U_1(pptr+idx) != 'H' )
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return 0;
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idx++;
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if ( GET_U_1(pptr+idx) != '-' )
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return 0;
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idx++;
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while (idx < len) {
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u_char c;
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c = GET_U_1(pptr + idx);
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if (c == '\n') {
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/*
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* LF without CR; end of line.
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* Skip the LF and print the line, with the
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* exception of the LF.
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*/
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goto print;
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} else if (c == '\r') {
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/* CR - any LF? */
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if ((idx+1) >= len) {
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/* not in this packet */
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goto trunc;
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}
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if (GET_U_1(pptr + idx + 1) == '\n') {
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/*
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* CR-LF; end of line.
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* Skip the CR-LF and print the line, with
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* the exception of the CR-LF.
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*/
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goto print;
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}
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/*
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* CR followed by something else; treat this as
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* if it were binary data and don't print it.
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*/
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goto trunc;
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} else if (!ND_ASCII_ISPRINT(c) ) {
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/*
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* Not a printable ASCII character; treat this
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* as if it were binary data and don't print it.
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*/
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goto trunc;
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}
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idx++;
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}
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trunc:
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return -1;
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print:
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ND_PRINT(": ");
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nd_print_protocol_caps(ndo);
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ND_PRINT(": %.*s", (int)idx, pptr);
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return idx;
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}
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void
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ssh_print(netdissect_options *ndo, const u_char *pptr, u_int len)
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{
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ndo->ndo_protocol = "ssh";
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ssh_print_version(ndo, pptr, len);
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}
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