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ec6c5df018
It should be stated as a rule that a C file should never include types/xxx.h when proto/xxx.h exists, as it gives less exposure to declaration conflicts (one of which was caught and fixed here) and it complicates the file headers for nothing. Only types/global.h, types/capture.h and types/polling.h have been found to be valid includes from C files.
63 lines
1.4 KiB
C
63 lines
1.4 KiB
C
/*
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* Functions for managing transparent proxying with CTTPROXY.
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* This file should be compiled only if CTTPROXY is enabled.
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*
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* Copyright 2000-2008 Willy Tarreau <w@1wt.eu>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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*/
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <common/compat.h>
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#include <common/config.h>
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#include <common/time.h>
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#include <import/ip_tproxy.h>
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/*
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* Checks that CTTPROXY is available and in the right version.
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* Returns 0 if OK, -1 if wrong version, -2 if not available or other error.
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*/
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int check_cttproxy_version() {
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struct in_tproxy itp1;
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int fd;
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memset(&itp1, 0, sizeof(itp1));
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fd = socket(AF_INET, SOCK_STREAM, 0);
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if (fd == -1)
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return -2;
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itp1.op = TPROXY_VERSION;
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itp1.v.version = 0x02000000; /* CTTPROXY version 2.0 expected */
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if (setsockopt(fd, SOL_IP, IP_TPROXY, &itp1, sizeof(itp1)) == -1) {
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if (errno == -EINVAL)
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return -1; /* wrong version */
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else
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return -2; /* not supported or other error */
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}
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return 0;
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}
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/*
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* Local variables:
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* c-indent-level: 8
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* c-basic-offset: 8
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* End:
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*/
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