From 7adcb5b605cc1328a3084c334f4697ec9771936c Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 15 Apr 2024 19:13:01 +0200 Subject: Adding upstream version 4.99.4. Signed-off-by: Daniel Baumann --- print-ssh.c | 99 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 99 insertions(+) create mode 100644 print-ssh.c (limited to 'print-ssh.c') diff --git a/print-ssh.c b/print-ssh.c new file mode 100644 index 0000000..5207c52 --- /dev/null +++ b/print-ssh.c @@ -0,0 +1,99 @@ +/* + * 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. + */ + +/* \summary: Secure Shell (SSH) printer */ + +#ifdef HAVE_CONFIG_H +#include +#endif + +#include "netdissect-stdinc.h" +#include "netdissect-ctype.h" + +#include "netdissect.h" +#include "extract.h" + +static int +ssh_print_version(netdissect_options *ndo, const u_char *pptr, u_int len) +{ + u_int idx = 0; + + if ( GET_U_1(pptr+idx) != 'S' ) + return 0; + idx++; + if ( GET_U_1(pptr+idx) != 'S' ) + return 0; + idx++; + if ( GET_U_1(pptr+idx) != 'H' ) + return 0; + idx++; + if ( GET_U_1(pptr+idx) != '-' ) + return 0; + idx++; + + while (idx < len) { + u_char c; + + c = GET_U_1(pptr + idx); + if (c == '\n') { + /* + * LF without CR; end of line. + * Skip the LF and print the line, with the + * exception of the LF. + */ + goto print; + } else if (c == '\r') { + /* CR - any LF? */ + if ((idx+1) >= len) { + /* not in this packet */ + goto trunc; + } + if (GET_U_1(pptr + idx + 1) == '\n') { + /* + * CR-LF; end of line. + * Skip the CR-LF and print the line, with + * the exception of the CR-LF. + */ + goto print; + } + + /* + * CR followed by something else; treat this as + * if it were binary data and don't print it. + */ + goto trunc; + } else if (!ND_ASCII_ISPRINT(c) ) { + /* + * Not a printable ASCII character; treat this + * as if it were binary data and don't print it. + */ + goto trunc; + } + idx++; + } +trunc: + return -1; +print: + ND_PRINT(": "); + nd_print_protocol_caps(ndo); + ND_PRINT(": %.*s", (int)idx, pptr); + return idx; +} + +void +ssh_print(netdissect_options *ndo, const u_char *pptr, u_int len) +{ + ndo->ndo_protocol = "ssh"; + + ssh_print_version(ndo, pptr, len); +} -- cgit v1.2.3