mirror of
https://github.com/the-tcpdump-group/tcpdump.git
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1ed63b5d06
We require an environment with a C99-compatible snprintf(), so we don't need to work around older implementations. Make the configuration process fail if we don't have snprintf() and vsnprintf(). We require at least VS 2015, so we don't have to check for _MSC_VER >= 1400. Make the build fail if we don't have at least VS 2015. We apparently do, however, have to use __inline, as the VS 2015 documentation doesn't meaning plain old "inline". Update a comment.
144 lines
4.3 KiB
C
144 lines
4.3 KiB
C
/*
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* Copyright (c) 1983, 1993 The Regents of the University of California.
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* Copyright (c) 1993 Digital Equipment Corporation.
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* Copyright (c) 2012 G. Vanem <gvanem@yahoo.no>.
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* Copyright (c) 2017 Ali Abdulkadir <autostart.ini@gmail.com>.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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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 <getservent.h>
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static FILE *servf = NULL;
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static char line[BUFSIZ+1];
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static struct servent serv;
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static char *serv_aliases[MAXALIASES];
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int _serv_stayopen;
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const char *etc_path(const char *file);
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/*
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* Check if <file> exists in the current directory and, if so, return it.
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* Else return either "%SYSTEMROOT%\System32\drivers\etc\<file>"
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* or $PREFIX/etc/<file>.
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* "<file>" is aka __PATH_SERVICES (aka "services" on Windows and
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* "/etc/services" on other platforms that would need this).
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*/
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const char *etc_path(const char *file)
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{
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const char *env = getenv(__PATH_SYSROOT);
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static char path[_MAX_PATH];
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/* see if "<file>" exists locally or whether __PATH_SYSROOT is valid */
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if (fopen(file, "r") || !env)
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return (file);
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else
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#ifdef _WIN32
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snprintf(path, sizeof(path), "%s%s%s", env, __PATH_ETC_INET, file);
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#else
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snprintf(path, sizeof(path), "%s%s", env, file);
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#endif
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return (path);
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}
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void
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setservent(int f)
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{
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if (servf == NULL)
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servf = fopen(etc_path(__PATH_SERVICES), "r");
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else
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rewind(servf);
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_serv_stayopen |= f;
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}
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void
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endservent(void)
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{
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if (servf) {
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fclose(servf);
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servf = NULL;
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}
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_serv_stayopen = 0;
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}
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struct servent *
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getservent(void)
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{
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char *p;
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char *cp, **q;
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if (servf == NULL && (servf = fopen(etc_path(__PATH_SERVICES), "r")) == NULL)
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return (NULL);
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again:
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if ((p = fgets(line, BUFSIZ, servf)) == NULL)
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return (NULL);
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if (*p == '#')
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goto again;
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cp = strpbrk(p, "#\n");
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if (cp == NULL)
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goto again;
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*cp = '\0';
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serv.s_name = p;
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p = strpbrk(p, " \t");
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if (p == NULL)
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goto again;
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*p++ = '\0';
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while (*p == ' ' || *p == '\t')
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p++;
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cp = strpbrk(p, ",/");
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if (cp == NULL)
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goto again;
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*cp++ = '\0';
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serv.s_port = htons((u_short)atoi(p));
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serv.s_proto = cp;
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q = serv.s_aliases = serv_aliases;
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cp = strpbrk(cp, " \t");
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if (cp != NULL)
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*cp++ = '\0';
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while (cp && *cp) {
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if (*cp == ' ' || *cp == '\t') {
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cp++;
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continue;
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}
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if (q < &serv_aliases[MAXALIASES - 1])
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*q++ = cp;
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cp = strpbrk(cp, " \t");
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if (cp != NULL)
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*cp++ = '\0';
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}
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*q = NULL;
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return (&serv);
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}
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