X-Git-Url: http://git.samba.org/?a=blobdiff_plain;f=util.c;h=a7a25578cf5206a1cc9da371b3c587c44df88a4b;hb=45859cc378646e7320281b74e4fae10b3bc29305;hp=82a789e68ebbb8af366c9cafc15ef29d4f2049ff;hpb=626b7e21ea02cdb6d0d869c1b907ba5bdddbad64;p=metze%2Fwireshark%2Fwip.git diff --git a/util.c b/util.c index 82a789e68e..a7a25578cf 100644 --- a/util.c +++ b/util.c @@ -1,10 +1,10 @@ /* util.c * Utility routines * - * $Id: util.c,v 1.65 2003/06/13 20:40:31 guy Exp $ + * $Id$ * - * Ethereal - Network traffic analyzer - * By Gerald Combs + * Wireshark - Network traffic analyzer + * By Gerald Combs * Copyright 1998 Gerald Combs * * This program is free software; you can redistribute it and/or @@ -41,336 +41,18 @@ #include #endif -#ifdef HAVE_SYS_STAT_H -#include -#endif - -#ifdef NEED_SNPRINTF_H -# include "snprintf.h" -#endif - -#ifdef NEED_MKSTEMP -#include "mkstemp.h" -#endif - -#ifdef HAVE_IO_H -#include -typedef int mode_t; /* for win32 */ -#endif - -#ifdef HAVE_LIBZ -#include /* to get the libz version number */ -#endif - -#ifdef HAVE_LIBPCAP -#include -#include "pcap-util.h" -#endif - -#ifdef HAVE_SOME_SNMP - -#ifdef HAVE_NET_SNMP -#include -#endif /* HAVE_NET_SNMP */ - -#ifdef HAVE_UCD_SNMP -#include -#endif /* HAVE_UCD_SNMP */ - -#endif /* HAVE_SOME_SNMP */ - -#ifdef HAVE_SYS_UTSNAME_H -#include -#endif +#include +#include +#include #include "util.h" -/* - * See whether the last line in the string goes past column 80; if so, - * replace the blank at the specified point with a newline. - */ -static void -do_word_wrap(GString *str, gint point) -{ - char *line_begin; - - line_begin = strrchr(str->str, '\n'); - if (line_begin == NULL) - line_begin = str->str; - else - line_begin++; - if (strlen(line_begin) > 80) { - g_assert(str->str[point] == ' '); - str->str[point] = '\n'; - } -} - -/* - * Get various library compile-time versions and append them to - * the specified GString. - */ -void -get_compiled_version_info(GString *str) -{ -#ifdef HAVE_LIBPCAP -#ifdef HAVE_PCAP_VERSION - extern char pcap_version[]; -#endif /* HAVE_PCAP_VERSION */ -#endif /* HAVE_LIBPCAP */ - gint break_point; - - g_string_append(str, "with "); - g_string_sprintfa(str, -#ifdef GLIB_MAJOR_VERSION - "GLib %d.%d.%d,", GLIB_MAJOR_VERSION, GLIB_MINOR_VERSION, - GLIB_MICRO_VERSION); -#else - "GLib (version unknown),"); -#endif - -#ifdef HAVE_LIBPCAP - g_string_append(str, " "); - break_point = str->len - 1; -#ifdef WIN32 - g_string_append("with WinPcap (version unknown)"); -#else /* WIN32 */ -#ifdef HAVE_PCAP_VERSION - g_string_sprintfa(str, "with libpcap %s,", pcap_version); -#else /* HAVE_PCAP_VERSION */ - g_string_append("with libpcap (version unknown)"); -#endif /* HAVE_PCAP_VERSION */ - do_word_wrap(str, break_point); -#endif /* WIN32 */ -#else /* HAVE_LIBPCAP */ - g_string_append(str, " "); - break_point = str->len - 1; -#ifdef WIN32 - g_string_append(str, "without WinPcap,"); -#else /* WIN32 */ - g_string_append(str, "without libpcap,"); -#endif /* WIN32 */ - do_word_wrap(str, break_point); -#endif /* HAVE_LIBPCAP */ - - g_string_append(str, " "); - break_point = str->len - 1; -#ifdef HAVE_LIBZ - g_string_append(str, "with libz "); -#ifdef ZLIB_VERSION - g_string_append(str, ZLIB_VERSION); -#else /* ZLIB_VERSION */ - g_string_append(str, "(version unknown)"); -#endif /* ZLIB_VERSION */ -#else /* HAVE_LIBZ */ - g_string_append(str, "without libz"); -#endif /* HAVE_LIBZ */ - g_string_append(str, ","); - do_word_wrap(str, break_point); - -/* Oh, this is pretty. */ -/* Oh, ha. you think that was pretty. Try this:! --Wes */ - g_string_append(str, " "); - break_point = str->len - 1; -#ifdef HAVE_SOME_SNMP - -#ifdef HAVE_UCD_SNMP - g_string_append(str, "with UCD-SNMP "); - g_string_append(str, VersionInfo); -#endif /* HAVE_UCD_SNMP */ - -#ifdef HAVE_NET_SNMP - g_string_append(str, "with Net-SNMP "); - g_string_append(str, netsnmp_get_version()); -#endif /* HAVE_NET_SNMP */ - -#else /* no SNMP library */ - g_string_append(str, "without UCD-SNMP or Net-SNMP"); -#endif /* HAVE_SOME_SNMP */ - g_string_append(str, ","); - do_word_wrap(str, break_point); - - g_string_append(str, " "); - break_point = str->len - 1; -#ifdef HAVE_GNU_ADNS - g_string_append(str, "with ADNS"); -#else - g_string_append(str, "without ADNS"); -#endif /* HAVE_GNU_ADNS */ - do_word_wrap(str, break_point); -} - -/* - * Get various library run-time versions, and the OS version, and append - * them to the specified GString. - */ -void -get_runtime_version_info(GString *str) -{ -#if defined(WIN32) - OSVERSIONINFO info; -#elif defined(HAVE_SYS_UTSNAME_H) - struct utsname name; -#endif - -#ifdef HAVE_LIBPCAP -#ifdef WIN32 - /* - * On Windows, we might have been compiled with WinPcap but - * might not have it loaded; indicate whether we have it or - * not. - * - * XXX - when versions of libcap and WinPcap with - * "pcap_lib_version()" are released, we should use it - * here if available. - */ - if (has_wpcap) - g_string_sprintfa(str, "with WinPcap "); - else - g_string_append(str, "without WinPcap "); -#endif /* WIN32 */ -#endif /* HAVE_LIBPCAP */ - - g_string_append(str, "on "); -#if defined(WIN32) - info.dwOSVersionInfoSize = sizeof info; - if (!GetVersionEx(&info)) { - /* - * XXX - get the failure reason. - */ - g_string_append(str, "unknown Windows version"); - return; - } - switch (info.dwPlatformId) { - - case VER_PLATFORM_WIN32s: - /* Shyeah, right. */ - g_string_sprintfa(str, "Windows 3.1 with Win32s"); - break; - - case VER_PLATFORM_WIN32_WINDOWS: - /* Windows OT */ - switch (info.dwMajorVersion) { - - case 4: - /* 3 cheers for Microsoft marketing! */ - switch (info.dwMinorVersion) { - - case 0: - g_string_sprintfa(str, "Windows 95"); - break; - - case 10: - g_string_sprintfa(str, "Windows 98"); - break; - - case 90: - g_string_sprintfa(str, "Windows Me"); - break; - - default: - g_string_sprintfa(str, "Windows OT, unknown version %u.%u", - info.dwMajorVersion, info.dwMinorVersion); - break; - } - break; - - default: - g_string_sprintfa(str, "Windows OT, unknown version %u.%u", - info.dwMajorVersion, info.dwMinorVersion); - break; - } - break; - - case VER_PLATFORM_WIN32_NT: - /* Windows NT */ - switch (info.dwMajorVersion) { - - case 3: - case 4: - g_string_sprintfa(str, "Windows NT %u.%u", - info.dwMajorVersion, info.dwMinorVersion); - break; - - case 5: - /* 3 cheers for Microsoft marketing! */ - switch (info.dwMinorVersion) { - - case 0: - g_string_sprintfa(str, "Windows 2000"); - break; - - case 1: - g_string_sprintfa(str, "Windows XP"); - break; - - case 2: - g_string_sprintfa(str, "Windows Server 2003"); - break; - - default: - g_string_sprintfa(str, "Windows NT, unknown version %u.%u", - info.dwMajorVersion, info.dwMinorVersion); - break; - } - break; - - default: - g_string_sprintfa(str, "Windows NT, unknown version %u.%u", - info.dwMajorVersion, info.dwMinorVersion); - break; - } - break; - - default: - g_string_sprintfa(str, "Unknown Windows platform %u version %u.%u", - info.dwPlatformId, info.dwMajorVersion, info.dwMinorVersion); - break; - } - if (info.szCSDVersion[0] != '\0') - g_string_sprintfa(str, " %s", info.szCSDVersion); - g_string_sprintfa(str, ", build %u", info.dwBuildNumber); -#elif defined(HAVE_SYS_UTSNAME_H) - /* - * We have , so we assume we have "uname()". - */ - if (uname(&name) < 0) { - g_string_sprintfa(str, "unknown OS version (uname failed - %s)", - strerror(errno)); - return; - } - - if (strcmp(name.sysname, "AIX") == 0) { - /* - * Yay, IBM! Thanks for doing something different - * from most of the other UNIXes out there, and - * making "name.version" apparently be the major - * version number and "name.release" be the minor - * version number. - */ - g_string_sprintfa(str, "%s %s.%s", name.sysname, name.version, - name.release); - } else { - /* - * XXX - get "version" on any other platforms? - * - * On Digital/Tru65 UNIX, it's something unknown. - * On Solaris, it's some kind of build information. - * On HP-UX, it appears to be some sort of subrevision - * thing. - */ - g_string_sprintfa(str, "%s %s", name.sysname, name.release); - } -#else - g_string_append(str, "an unknown OS"); -#endif -} - /* * Collect command-line arguments as a string consisting of the arguments, * separated by spaces. */ char * -get_args_as_string(int argc, char **argv, int optind) +get_args_as_string(int argc, char **argv, int optindex) { int len; int i; @@ -380,244 +62,31 @@ get_args_as_string(int argc, char **argv, int optind) * Find out how long the string will be. */ len = 0; - for (i = optind; i < argc; i++) { - len += strlen(argv[i]); + for (i = optindex; i < argc; i++) { + len += (int) strlen(argv[i]); len++; /* space, or '\0' if this is the last argument */ } /* * Allocate the buffer for the string. */ - argstring = g_malloc(len); + argstring = (char *)g_malloc(len); /* * Now construct the string. */ - strcpy(argstring, ""); - i = optind; + argstring[0] = '\0'; + i = optindex; for (;;) { - strcat(argstring, argv[i]); + g_strlcat(argstring, argv[i], len); i++; if (i == argc) break; - strcat(argstring, " "); + g_strlcat(argstring, " ", len); } return argstring; } -static char * -setup_tmpdir(char *dir) -{ - int len = strlen(dir); - char *newdir; - - /* Append slash if necessary */ - if (dir[len - 1] == '/') { - newdir = dir; - } - else { - newdir = g_malloc(len + 2); - strcpy(newdir, dir); - strcat(newdir, "/"); - } - return newdir; -} - -static int -try_tempfile(char *namebuf, int namebuflen, const char *dir, const char *pfx) -{ - static const char suffix[] = "XXXXXXXXXX"; - int namelen = strlen(dir) + strlen(pfx) + sizeof suffix; - mode_t old_umask; - int tmp_fd; - - if (namebuflen < namelen) { - /* Stick in a truncated name, so that if this error is - reported with the file name, you at least get - something. */ - snprintf(namebuf, namebuflen, "%s%s%s", dir, pfx, suffix); - errno = ENAMETOOLONG; - return -1; - } - strcpy(namebuf, dir); - strcat(namebuf, pfx); - strcat(namebuf, suffix); - - /* The Single UNIX Specification doesn't say that "mkstemp()" - creates the temporary file with mode rw-------, so we - won't assume that all UNIXes will do so; instead, we set - the umask to 0077 to take away all group and other - permissions, attempt to create the file, and then put - the umask back. */ - old_umask = umask(0077); - tmp_fd = mkstemp(namebuf); - umask(old_umask); - return tmp_fd; -} - -static char *tmpdir = NULL; -#ifdef WIN32 -static char *temp = NULL; -#endif -static char *E_tmpdir; - -#ifndef P_tmpdir -#define P_tmpdir "/var/tmp" -#endif - -int -create_tempfile(char *namebuf, int namebuflen, const char *pfx) -{ - char *dir; - int fd; - static gboolean initialized; - - if (!initialized) { - if ((dir = getenv("TMPDIR")) != NULL) - tmpdir = setup_tmpdir(dir); -#ifdef WIN32 - if ((dir = getenv("TEMP")) != NULL) - temp = setup_tmpdir(dir); -#endif - - E_tmpdir = setup_tmpdir(P_tmpdir); - initialized = TRUE; - } - - if (tmpdir != NULL) { - fd = try_tempfile(namebuf, namebuflen, tmpdir, pfx); - if (fd != -1) - return fd; - } - -#ifdef WIN32 - if (temp != NULL) { - fd = try_tempfile(namebuf, namebuflen, temp, pfx); - if (fd != -1) - return fd; - } -#endif - - fd = try_tempfile(namebuf, namebuflen, E_tmpdir, pfx); - if (fd != -1) - return fd; - - return try_tempfile(namebuf, namebuflen, "/tmp", pfx); -} - -/* ASCII/EBCDIC conversion tables from - * http://www.room42.com/store/computer_center/code_tables.shtml - */ -#if 0 -static guint8 ASCII_translate_EBCDIC [ 256 ] = { - 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, - 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, - 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, - 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, - 0x40, 0x5A, 0x7F, 0x7B, 0x5B, 0x6C, 0x50, 0x7D, 0x4D, - 0x5D, 0x5C, 0x4E, 0x6B, 0x60, 0x4B, 0x61, - 0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, - 0xF9, 0x7A, 0x5E, 0x4C, 0x7E, 0x6E, 0x6F, - 0x7C, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, - 0xC9, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, - 0xD7, 0xD8, 0xD9, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, - 0xE8, 0xE9, 0xAD, 0xE0, 0xBD, 0x5F, 0x6D, - 0x7D, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, - 0x89, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, - 0x97, 0x98, 0x99, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, - 0xA8, 0xA9, 0xC0, 0x6A, 0xD0, 0xA1, 0x4B, - 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, - 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, - 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, - 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, - 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, - 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, - 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, - 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, - 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, - 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, - 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, - 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, - 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, - 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, - 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, - 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B -}; - -void -ASCII_to_EBCDIC(guint8 *buf, guint bytes) -{ - guint i; - guint8 *bufptr; - - bufptr = buf; - - for (i = 0; i < bytes; i++, bufptr++) { - *bufptr = ASCII_translate_EBCDIC[*bufptr]; - } -} - -guint8 -ASCII_to_EBCDIC1(guint8 c) -{ - return ASCII_translate_EBCDIC[c]; -} -#endif - -static guint8 EBCDIC_translate_ASCII [ 256 ] = { - 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, - 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, - 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, - 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, - 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, - 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F, - 0x2E, 0x2E, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, - 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x2E, 0x3F, - 0x20, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, - 0x2E, 0x2E, 0x2E, 0x3C, 0x28, 0x2B, 0x7C, - 0x26, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, - 0x2E, 0x21, 0x24, 0x2A, 0x29, 0x3B, 0x5E, - 0x2D, 0x2F, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, - 0x2E, 0x7C, 0x2C, 0x25, 0x5F, 0x3E, 0x3F, - 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, - 0x2E, 0x3A, 0x23, 0x40, 0x27, 0x3D, 0x22, - 0x2E, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, - 0x69, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, - 0x2E, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70, 0x71, - 0x72, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, - 0x2E, 0x7E, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, - 0x7A, 0x2E, 0x2E, 0x2E, 0x5B, 0x2E, 0x2E, - 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, - 0x2E, 0x2E, 0x2E, 0x2E, 0x5D, 0x2E, 0x2E, - 0x7B, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, - 0x49, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, - 0x7D, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, 0x50, 0x51, - 0x52, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, - 0x5C, 0x2E, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, - 0x5A, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, - 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, - 0x39, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E -}; - -void -EBCDIC_to_ASCII(guint8 *buf, guint bytes) -{ - guint i; - guint8 *bufptr; - - bufptr = buf; - - for (i = 0; i < bytes; i++, bufptr++) { - *bufptr = EBCDIC_translate_ASCII[*bufptr]; - } -} - -guint8 -EBCDIC_to_ASCII1(guint8 c) -{ - return EBCDIC_translate_ASCII[c]; -} - /* Compute the difference between two seconds/microseconds time stamps. */ void compute_timestamp_diff(gint *diffsec, gint *diffusec, @@ -662,35 +131,211 @@ compute_timestamp_diff(gint *diffsec, gint *diffusec, } } -/* Decode a base64 string in-place - simple and slow algorithm. - Return length of result. Taken from rproxy/librsync/base64.c by - Andrew Tridgell. */ +/* Remove any % from an IP address. */ +static char *sanitize_filter_ip(char *hostname) { + gchar *end; + gchar *ret; -size_t base64_decode(char *s) -{ - static const char b64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; - int bit_offset, byte_offset, idx, i, n; - unsigned char *d = (unsigned char *)s; - char *p; - - n=i=0; - - while (*s && (p=strchr(b64, *s))) { - idx = (int)(p - b64); - byte_offset = (i*6)/8; - bit_offset = (i*6)%8; - d[byte_offset] &= ~((1<<(8-bit_offset))-1); - if (bit_offset < 3) { - d[byte_offset] |= (idx << (2-bit_offset)); - n = byte_offset+1; - } else { - d[byte_offset] |= (idx >> (bit_offset-2)); - d[byte_offset+1] = 0; - d[byte_offset+1] |= (idx << (8-(bit_offset-2))) & 0xFF; - n = byte_offset+2; - } - s++; i++; + ret = g_strdup(hostname); + if (!ret) + return NULL; + + end = strchr(ret, '%'); + if (end) + *end = '\0'; + return ret; +} + +/* Try to figure out if we're remotely connected, e.g. via ssh or + Terminal Server, and create a capture filter that matches aspects of the + connection. We match the following environment variables: + + SSH_CONNECTION (ssh): + SSH_CLIENT (ssh): + REMOTEHOST (tcsh, others?): + DISPLAY (x11): [remote name]: + SESSIONNAME (terminal server): + */ + +const gchar *get_conn_cfilter(void) { + static GString *filter_str = NULL; + gchar *env, **tokens; + char *lastp, *lastc, *p; + char *pprotocol = NULL; + char *phostname = NULL; + size_t hostlen; + char *remip, *locip; + + if (filter_str == NULL) { + filter_str = g_string_new(""); } + if ((env = getenv("SSH_CONNECTION")) != NULL) { + tokens = g_strsplit(env, " ", 4); + if (tokens[3]) { + remip = sanitize_filter_ip(tokens[0]); + locip = sanitize_filter_ip(tokens[2]); + g_string_printf(filter_str, "not (tcp port %s and %s host %s " + "and tcp port %s and %s host %s)", tokens[1], host_ip_af(remip), remip, + tokens[3], host_ip_af(locip), locip); + g_free(remip); + g_free(locip); + return filter_str->str; + } + } else if ((env = getenv("SSH_CLIENT")) != NULL) { + tokens = g_strsplit(env, " ", 3); + remip = sanitize_filter_ip(tokens[2]); + g_string_printf(filter_str, "not (tcp port %s and %s host %s " + "and tcp port %s)", tokens[1], host_ip_af(remip), tokens[0], remip); + g_free(remip); + return filter_str->str; + } else if ((env = getenv("REMOTEHOST")) != NULL) { + /* FreeBSD 7.0 sets REMOTEHOST to an empty string */ + if (g_ascii_strcasecmp(env, "localhost") == 0 || + strcmp(env, "127.0.0.1") == 0 || + strcmp(env, "") == 0) { + return ""; + } + remip = sanitize_filter_ip(env); + g_string_printf(filter_str, "not %s host %s", host_ip_af(remip), remip); + g_free(remip); + return filter_str->str; + } else if ((env = getenv("DISPLAY")) != NULL) { + /* + * This mirrors what _X11TransConnectDisplay() does. + * Note that, on some systems, the hostname can + * begin with "/", which means that it's a pathname + * of a UNIX domain socket to connect to. + * + * The comments mirror those in _X11TransConnectDisplay(), + * too. :-) + * + * Display names may be of the following format: + * + * [protoco./] [hostname] : [:] displaynumber [.screennumber] + * + * A string with exactly two colons separating hostname + * from the display indicates a DECnet style name. Colons + * in the hostname may occur if an IPv6 numeric address + * is used as the hostname. An IPv6 numeric address may + * also end in a double colon, so three colons in a row + * indicates an IPv6 address ending in :: followed by + * :display. To make it easier for people to read, an + * IPv6 numeric address hostname may be surrounded by [] + * in a similar fashion to the IPv6 numeric address URL + * syntax defined by IETF RFC 2732. + * + * If no hostname and no protocol is specified, the string + * is interpreted as the most efficient local connection + * to a server on the same machine. This is usually: + * + * o shared memory + * o local stream + * o UNIX domain socket + * o TCP to local host. + */ + + p = env; + + /* + * Step 0, find the protocol. This is delimited by + * the optional slash ('/'). + */ + for (lastp = p; *p != '\0' && *p != ':' && *p != '/'; p++) + ; + if (*p == '\0') + return ""; /* must have a colon */ + + if (p != lastp && *p != ':') { /* protocol given? */ + /* Yes */ + pprotocol = p; + + /* Is it TCP? */ + if (p - lastp != 3 || g_ascii_strncasecmp(lastp, "tcp", 3) != 0) + return ""; /* not TCP */ + p++; /* skip the '/' */ + } else + p = env; /* reset the pointer in + case no protocol was given */ - return n; + /* + * Step 1, find the hostname. This is delimited either by + * one colon, or two colons in the case of DECnet (DECnet + * Phase V allows a single colon in the hostname). (See + * note above regarding IPv6 numeric addresses with + * triple colons or [] brackets.) + */ + lastp = p; + lastc = NULL; + for (; *p != '\0'; p++) + if (*p == ':') + lastc = p; + + if (lastc == NULL) + return ""; /* must have a colon */ + + if ((lastp != lastc) && (*(lastc - 1) == ':') + && (((lastc - 1) == lastp) || (*(lastc - 2) != ':'))) { + /* DECnet display specified */ + return ""; + } else + hostlen = lastc - lastp; + + if (hostlen == 0) + return ""; /* no hostname supplied */ + + phostname = (char *)g_malloc(hostlen + 1); + memcpy(phostname, lastp, hostlen); + phostname[hostlen] = '\0'; + + if (pprotocol == NULL) { + /* + * No protocol was explicitly specified, so it + * could be a local connection over a transport + * that we won't see. + * + * Does the host name refer to the local host? + * If so, the connection would probably be a + * local connection. + * + * XXX - compare against our host name? + * _X11TransConnectDisplay() does. + */ + if (g_ascii_strcasecmp(phostname, "localhost") == 0 || + strcmp(phostname, "127.0.0.1") == 0) { + g_free(phostname); + return ""; + } + + /* + * A host name of "unix" (case-sensitive) also + * causes a local connection. + */ + if (strcmp(phostname, "unix") == 0) { + g_free(phostname); + return ""; + } + + /* + * Does the host name begin with "/"? If so, + * it's presumed to be the pathname of a + * UNIX domain socket. + */ + if (phostname[0] == '/') { + g_free(phostname); + return ""; + } + } + + g_string_printf(filter_str, "not %s host %s", + host_ip_af(phostname), phostname); + g_free(phostname); + return filter_str->str; +#ifdef _WIN32 + } else if (GetSystemMetrics(SM_REMOTESESSION)) { + /* We have a remote session: http://msdn.microsoft.com/en-us/library/aa380798%28VS.85%29.aspx */ + g_string_printf(filter_str, "not tcp port 3389"); + return filter_str->str; +#endif /* _WIN32 */ + } + return ""; }