projects / thirdparty / squid.git / blame
| Commit | Line | Data |
|---|---|---|
| 055421ee | 1 | /* |
| bbc27441 | 2 | * Copyright (C) 1996-2014 The Squid Software Foundation and contributors |
| 055421ee | 3 | * |
| bbc27441 AJ |
4 | * Squid software is distributed under GPLv2+ license and includes |
| 5 | * contributions from numerous individuals and organizations. | |
| 6 | * Please see the COPYING and CONTRIBUTORS files for details. | |
| 055421ee AJ |
7 | */ |
| 8 | ||
| bbc27441 AJ |
9 | /* DEBUG: section 21 Misc Functions */ |
| 10 | ||
| f7f3304a | 11 | #include "squid.h" |
| 055421ee AJ |
12 | #include "Debug.h" |
| 13 | #include "ip/tools.h" | |
| 14 | ||
| 60d08fa6 AJ |
15 | #if HAVE_UNISTD_H |
| 16 | #include <unistd.h> | |
| 17 | #endif | |
| 055421ee AJ |
18 | #if HAVE_SYS_SOCKET_H |
| 19 | #include <sys/socket.h> | |
| 20 | #endif | |
| 21 | #if HAVE_NETINET_IN_H | |
| 22 | #include <netinet/in.h> | |
| 23 | #endif | |
| 24 | #if HAVE_NETINET_IN6_H | |
| 25 | #include <netinet/in6.h> | |
| 26 | #endif | |
| 27 | ||
| 28 | int Ip::EnableIpv6 = IPV6_OFF; | |
| 29 | ||
| 30 | void | |
| 31 | Ip::ProbeTransport() | |
| 32 | { | |
| 33 | #if USE_IPV6 | |
| 34 | // check for usable IPv6 sockets | |
| 35 | int s = socket(PF_INET6, SOCK_STREAM, 0); | |
| 36 | if (s < 0) { | |
| 37 | debugs(3, 2, "IPv6 not supported on this machine. Auto-Disabled."); | |
| 38 | EnableIpv6 = IPV6_OFF; | |
| 39 | return; | |
| 40 | } | |
| 41 | ||
| 42 | // Test for v4-mapping capability | |
| ca44fd48 AJ |
43 | // (AKA. the operating system supports RFC 3493 section 5.3) |
| 44 | #if defined(IPV6_V6ONLY) | |
| 055421ee | 45 | int tos = 0; |
| 6df7ad56 | 46 | if (setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, (char *) &tos, sizeof(int)) == 0) { |
| 055421ee AJ |
47 | debugs(3, 2, "Detected IPv6 hybrid or v4-mapping stack..."); |
| 48 | EnableIpv6 |= IPV6_SPECIAL_V4MAPPING; | |
| 49 | } else { | |
| 50 | debugs(3, 2, "Detected split IPv4 and IPv6 stacks ..."); | |
| e0209dae | 51 | EnableIpv6 |= IPV6_SPECIAL_SPLITSTACK; |
| 055421ee | 52 | } |
| ca44fd48 AJ |
53 | #else |
| 54 | // compliance here means they at least supply the option for compilers building code | |
| 55 | // even if possibly to return hard-coded -1 on use. | |
| 56 | debugs(3, 2, "Missing RFC 3493 compliance - attempting split IPv4 and IPv6 stacks ..."); | |
| 57 | EnableIpv6 |= IPV6_SPECIAL_SPLITSTACK; | |
| 58 | #endif | |
| 055421ee AJ |
59 | close(s); |
| 60 | ||
| 61 | debugs(3, 2, "IPv6 transport " << (EnableIpv6?"Enabled":"Disabled")); | |
| 62 | #else | |
| 63 | debugs(3, 2, "IPv6 transport forced OFF by build parameters."); | |
| 64 | EnableIpv6 = IPV6_OFF; | |
| 65 | #endif | |
| 66 | } |