projects / thirdparty / squid.git / blame
| Commit | Line | Data |
|---|---|---|
| 055421ee AJ |
1 | /* |
| 2 | * DEBUG: section 21 Misc Functions | |
| 3 | * AUTHOR: Amos Jeffries | |
| 4 | * | |
| 5 | * SQUID Web Proxy Cache http://www.squid-cache.org/ | |
| 6 | * ---------------------------------------------------------- | |
| 7 | * | |
| 8 | * Squid is the result of efforts by numerous individuals from | |
| 9 | * the Internet community; see the CONTRIBUTORS file for full | |
| 10 | * details. Many organizations have provided support for Squid's | |
| 11 | * development; see the SPONSORS file for full details. Squid is | |
| 12 | * Copyrighted (C) 2001 by the Regents of the University of | |
| 13 | * California; see the COPYRIGHT file for full details. Squid | |
| 14 | * incorporates software developed and/or copyrighted by other | |
| 15 | * sources; see the CREDITS file for full details. | |
| 16 | * | |
| 17 | * This program is free software; you can redistribute it and/or modify | |
| 18 | * it under the terms of the GNU General Public License as published by | |
| 19 | * the Free Software Foundation; either version 2 of the License, or | |
| 20 | * (at your option) any later version. | |
| 21 | * | |
| 22 | * This program is distributed in the hope that it will be useful, | |
| 23 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 24 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 25 | * GNU General Public License for more details. | |
| 26 | * | |
| 27 | * You should have received a copy of the GNU General Public License | |
| 28 | * along with this program; if not, write to the Free Software | |
| 29 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. | |
| 30 | * | |
| 31 | */ | |
| 32 | ||
| f7f3304a | 33 | #include "squid.h" |
| 055421ee AJ |
34 | #include "Debug.h" |
| 35 | #include "ip/tools.h" | |
| 36 | ||
| 60d08fa6 AJ |
37 | #if HAVE_UNISTD_H |
| 38 | #include <unistd.h> | |
| 39 | #endif | |
| 055421ee AJ |
40 | #if HAVE_SYS_SOCKET_H |
| 41 | #include <sys/socket.h> | |
| 42 | #endif | |
| 43 | #if HAVE_NETINET_IN_H | |
| 44 | #include <netinet/in.h> | |
| 45 | #endif | |
| 46 | #if HAVE_NETINET_IN6_H | |
| 47 | #include <netinet/in6.h> | |
| 48 | #endif | |
| 49 | ||
| 50 | int Ip::EnableIpv6 = IPV6_OFF; | |
| 51 | ||
| 52 | void | |
| 53 | Ip::ProbeTransport() | |
| 54 | { | |
| 55 | #if USE_IPV6 | |
| 56 | // check for usable IPv6 sockets | |
| 57 | int s = socket(PF_INET6, SOCK_STREAM, 0); | |
| 58 | if (s < 0) { | |
| 59 | debugs(3, 2, "IPv6 not supported on this machine. Auto-Disabled."); | |
| 60 | EnableIpv6 = IPV6_OFF; | |
| 61 | return; | |
| 62 | } | |
| 63 | ||
| 64 | // Test for v4-mapping capability | |
| ca44fd48 AJ |
65 | // (AKA. the operating system supports RFC 3493 section 5.3) |
| 66 | #if defined(IPV6_V6ONLY) | |
| 055421ee | 67 | int tos = 0; |
| 6df7ad56 | 68 | if (setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, (char *) &tos, sizeof(int)) == 0) { |
| 055421ee AJ |
69 | debugs(3, 2, "Detected IPv6 hybrid or v4-mapping stack..."); |
| 70 | EnableIpv6 |= IPV6_SPECIAL_V4MAPPING; | |
| 71 | } else { | |
| 72 | debugs(3, 2, "Detected split IPv4 and IPv6 stacks ..."); | |
| e0209dae | 73 | EnableIpv6 |= IPV6_SPECIAL_SPLITSTACK; |
| 055421ee | 74 | } |
| ca44fd48 AJ |
75 | #else |
| 76 | // compliance here means they at least supply the option for compilers building code | |
| 77 | // even if possibly to return hard-coded -1 on use. | |
| 78 | debugs(3, 2, "Missing RFC 3493 compliance - attempting split IPv4 and IPv6 stacks ..."); | |
| 79 | EnableIpv6 |= IPV6_SPECIAL_SPLITSTACK; | |
| 80 | #endif | |
| 055421ee AJ |
81 | close(s); |
| 82 | ||
| 83 | debugs(3, 2, "IPv6 transport " << (EnableIpv6?"Enabled":"Disabled")); | |
| 84 | #else | |
| 85 | debugs(3, 2, "IPv6 transport forced OFF by build parameters."); | |
| 86 | EnableIpv6 = IPV6_OFF; | |
| 87 | #endif | |
| 88 | } |