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Diffstat (limited to 'lib/isc/unix/include/isc/net.h')
| -rw-r--r-- | lib/isc/unix/include/isc/net.h | 365 |
1 files changed, 365 insertions, 0 deletions
diff --git a/lib/isc/unix/include/isc/net.h b/lib/isc/unix/include/isc/net.h new file mode 100644 index 0000000..6d3dcaa --- /dev/null +++ b/lib/isc/unix/include/isc/net.h @@ -0,0 +1,365 @@ +/* + * Copyright (C) 2004, 2005, 2007, 2008 Internet Systems Consortium, Inc. ("ISC") + * Copyright (C) 1999-2003 Internet Software Consortium. + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH + * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, + * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM + * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE + * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR + * PERFORMANCE OF THIS SOFTWARE. + */ + +/* $Id: net.h,v 1.48 2008/06/23 23:47:11 tbox Exp $ */ + +#ifndef ISC_NET_H +#define ISC_NET_H 1 + +/***** + ***** Module Info + *****/ + +/*! \file + * \brief + * Basic Networking Types + * + * This module is responsible for defining the following basic networking + * types: + * + *\li struct in_addr + *\li struct in6_addr + *\li struct in6_pktinfo + *\li struct sockaddr + *\li struct sockaddr_in + *\li struct sockaddr_in6 + *\li in_port_t + * + * It ensures that the AF_ and PF_ macros are defined. + * + * It declares ntoh[sl]() and hton[sl](). + * + * It declares inet_aton(), inet_ntop(), and inet_pton(). + * + * It ensures that #INADDR_LOOPBACK, #INADDR_ANY, #IN6ADDR_ANY_INIT, + * in6addr_any, and in6addr_loopback are available. + * + * It ensures that IN_MULTICAST() is available to check for multicast + * addresses. + * + * MP: + *\li No impact. + * + * Reliability: + *\li No anticipated impact. + * + * Resources: + *\li N/A. + * + * Security: + *\li No anticipated impact. + * + * Standards: + *\li BSD Socket API + *\li RFC2553 + */ + +/*** + *** Imports. + ***/ +#include <isc/platform.h> + +#include <sys/types.h> +#include <sys/socket.h> /* Contractual promise. */ + +#include <net/if.h> + +#include <netinet/in.h> /* Contractual promise. */ +#include <arpa/inet.h> /* Contractual promise. */ +#ifdef ISC_PLATFORM_NEEDNETINETIN6H +#include <netinet/in6.h> /* Required on UnixWare. */ +#endif +#ifdef ISC_PLATFORM_NEEDNETINET6IN6H +#include <netinet6/in6.h> /* Required on BSD/OS for in6_pktinfo. */ +#endif + +#ifndef ISC_PLATFORM_HAVEIPV6 +#include <isc/ipv6.h> /* Contractual promise. */ +#endif + +#include <isc/lang.h> +#include <isc/types.h> + +#ifdef ISC_PLATFORM_HAVEINADDR6 +#define in6_addr in_addr6 /*%< Required for pre RFC2133 implementations. */ +#endif + +#ifdef ISC_PLATFORM_HAVEIPV6 +#ifndef IN6ADDR_ANY_INIT +#ifdef s6_addr +/*% + * Required for some pre RFC2133 implementations. + * IN6ADDR_ANY_INIT and IN6ADDR_LOOPBACK_INIT were added in + * draft-ietf-ipngwg-bsd-api-04.txt or draft-ietf-ipngwg-bsd-api-05.txt. + * If 's6_addr' is defined then assume that there is a union and three + * levels otherwise assume two levels required. + */ +#define IN6ADDR_ANY_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } } } +#else +#define IN6ADDR_ANY_INIT { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } } +#endif +#endif + +#ifndef IN6ADDR_LOOPBACK_INIT +#ifdef s6_addr +/*% IPv6 address loopback init */ +#define IN6ADDR_LOOPBACK_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } } +#else +#define IN6ADDR_LOOPBACK_INIT { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } +#endif +#endif + +#ifndef IN6_IS_ADDR_V4MAPPED +/*% Is IPv6 address V4 mapped? */ +#define IN6_IS_ADDR_V4MAPPED(x) \ + (memcmp((x)->s6_addr, in6addr_any.s6_addr, 10) == 0 && \ + (x)->s6_addr[10] == 0xff && (x)->s6_addr[11] == 0xff) +#endif + +#ifndef IN6_IS_ADDR_V4COMPAT +/*% Is IPv6 address V4 compatible? */ +#define IN6_IS_ADDR_V4COMPAT(x) \ + (memcmp((x)->s6_addr, in6addr_any.s6_addr, 12) == 0 && \ + ((x)->s6_addr[12] != 0 || (x)->s6_addr[13] != 0 || \ + (x)->s6_addr[14] != 0 || \ + ((x)->s6_addr[15] != 0 && (x)->s6_addr[15] != 1))) +#endif + +#ifndef IN6_IS_ADDR_MULTICAST +/*% Is IPv6 address multicast? */ +#define IN6_IS_ADDR_MULTICAST(a) ((a)->s6_addr[0] == 0xff) +#endif + +#ifndef IN6_IS_ADDR_LINKLOCAL +/*% Is IPv6 address linklocal? */ +#define IN6_IS_ADDR_LINKLOCAL(a) \ + (((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0x80)) +#endif + +#ifndef IN6_IS_ADDR_SITELOCAL +/*% is IPv6 address sitelocal? */ +#define IN6_IS_ADDR_SITELOCAL(a) \ + (((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0xc0)) +#endif + + +#ifndef IN6_IS_ADDR_LOOPBACK +/*% is IPv6 address loopback? */ +#define IN6_IS_ADDR_LOOPBACK(x) \ + (memcmp((x)->s6_addr, in6addr_loopback.s6_addr, 16) == 0) +#endif +#endif + +#ifndef AF_INET6 +/*% IPv6 */ +#define AF_INET6 99 +#endif + +#ifndef PF_INET6 +/*% IPv6 */ +#define PF_INET6 AF_INET6 +#endif + +#ifndef INADDR_LOOPBACK +/*% inaddr loopback */ +#define INADDR_LOOPBACK 0x7f000001UL +#endif + +#ifndef ISC_PLATFORM_HAVEIN6PKTINFO +/*% IPv6 packet info */ +struct in6_pktinfo { + struct in6_addr ipi6_addr; /*%< src/dst IPv6 address */ + unsigned int ipi6_ifindex; /*%< send/recv interface index */ +}; +#endif + +#if defined(ISC_PLATFORM_HAVEIPV6) && defined(ISC_PLATFORM_NEEDIN6ADDRANY) +extern const struct in6_addr isc_net_in6addrany; +/*% + * Cope with a missing in6addr_any and in6addr_loopback. + */ +#define in6addr_any isc_net_in6addrany +#endif + +#if defined(ISC_PLATFORM_HAVEIPV6) && defined(ISC_PLATFORM_NEEDIN6ADDRLOOPBACK) +extern const struct in6_addr isc_net_in6addrloop; +#define in6addr_loopback isc_net_in6addrloop +#endif + +#ifdef ISC_PLATFORM_FIXIN6ISADDR +#undef IN6_IS_ADDR_GEOGRAPHIC +/*! + * \brief + * Fix UnixWare 7.1.1's broken IN6_IS_ADDR_* definitions. + */ +#define IN6_IS_ADDR_GEOGRAPHIC(a) (((a)->S6_un.S6_l[0] & 0xE0) == 0x80) +#undef IN6_IS_ADDR_IPX +#define IN6_IS_ADDR_IPX(a) (((a)->S6_un.S6_l[0] & 0xFE) == 0x04) +#undef IN6_IS_ADDR_LINKLOCAL +#define IN6_IS_ADDR_LINKLOCAL(a) (((a)->S6_un.S6_l[0] & 0xC0FF) == 0x80FE) +#undef IN6_IS_ADDR_MULTICAST +#define IN6_IS_ADDR_MULTICAST(a) (((a)->S6_un.S6_l[0] & 0xFF) == 0xFF) +#undef IN6_IS_ADDR_NSAP +#define IN6_IS_ADDR_NSAP(a) (((a)->S6_un.S6_l[0] & 0xFE) == 0x02) +#undef IN6_IS_ADDR_PROVIDER +#define IN6_IS_ADDR_PROVIDER(a) (((a)->S6_un.S6_l[0] & 0xE0) == 0x40) +#undef IN6_IS_ADDR_SITELOCAL +#define IN6_IS_ADDR_SITELOCAL(a) (((a)->S6_un.S6_l[0] & 0xC0FF) == 0xC0FE) +#endif /* ISC_PLATFORM_FIXIN6ISADDR */ + +#ifdef ISC_PLATFORM_NEEDPORTT +/*% + * Ensure type in_port_t is defined. + */ +typedef isc_uint16_t in_port_t; +#endif + +#ifndef MSG_TRUNC +/*% + * If this system does not have MSG_TRUNC (as returned from recvmsg()) + * ISC_PLATFORM_RECVOVERFLOW will be defined. This will enable the MSG_TRUNC + * faking code in socket.c. + */ +#define ISC_PLATFORM_RECVOVERFLOW +#endif + +/*% IP address. */ +#define ISC__IPADDR(x) ((isc_uint32_t)htonl((isc_uint32_t)(x))) + +/*% Is IP address multicast? */ +#define ISC_IPADDR_ISMULTICAST(i) \ + (((isc_uint32_t)(i) & ISC__IPADDR(0xf0000000)) \ + == ISC__IPADDR(0xe0000000)) + +#define ISC_IPADDR_ISEXPERIMENTAL(i) \ + (((isc_uint32_t)(i) & ISC__IPADDR(0xf0000000)) \ + == ISC__IPADDR(0xf0000000)) + +/*** + *** Functions. + ***/ + +ISC_LANG_BEGINDECLS + +isc_result_t +isc_net_probeipv4(void); +/*%< + * Check if the system's kernel supports IPv4. + * + * Returns: + * + *\li #ISC_R_SUCCESS IPv4 is supported. + *\li #ISC_R_NOTFOUND IPv4 is not supported. + *\li #ISC_R_DISABLED IPv4 is disabled. + *\li #ISC_R_UNEXPECTED + */ + +isc_result_t +isc_net_probeipv6(void); +/*%< + * Check if the system's kernel supports IPv6. + * + * Returns: + * + *\li #ISC_R_SUCCESS IPv6 is supported. + *\li #ISC_R_NOTFOUND IPv6 is not supported. + *\li #ISC_R_DISABLED IPv6 is disabled. + *\li #ISC_R_UNEXPECTED + */ + +isc_result_t +isc_net_probe_ipv6only(void); +/*%< + * Check if the system's kernel supports the IPV6_V6ONLY socket option. + * + * Returns: + * + *\li #ISC_R_SUCCESS the option is supported for both TCP and UDP. + *\li #ISC_R_NOTFOUND IPv6 itself or the option is not supported. + *\li #ISC_R_UNEXPECTED + */ + +isc_result_t +isc_net_probe_ipv6pktinfo(void); +/* + * Check if the system's kernel supports the IPV6_(RECV)PKTINFO socket option + * for UDP sockets. + * + * Returns: + * + * \li #ISC_R_SUCCESS the option is supported. + * \li #ISC_R_NOTFOUND IPv6 itself or the option is not supported. + * \li #ISC_R_UNEXPECTED + */ + +void +isc_net_disableipv4(void); + +void +isc_net_disableipv6(void); + +void +isc_net_enableipv4(void); + +void +isc_net_enableipv6(void); + +isc_result_t +isc_net_probeunix(void); +/* + * Returns whether UNIX domain sockets are supported. + */ + +isc_result_t +isc_net_getudpportrange(int af, in_port_t *low, in_port_t *high); +/*%< + * Returns system's default range of ephemeral UDP ports, if defined. + * If the range is not available or unknown, ISC_NET_PORTRANGELOW and + * ISC_NET_PORTRANGEHIGH will be returned. + * + * Requires: + * + *\li 'low' and 'high' must be non NULL. + * + * Returns: + * + *\li *low and *high will be the ports specifying the low and high ends of + * the range. + */ + +#ifdef ISC_PLATFORM_NEEDNTOP +const char * +isc_net_ntop(int af, const void *src, char *dst, size_t size); +#define inet_ntop isc_net_ntop +#endif + +#ifdef ISC_PLATFORM_NEEDPTON +int +isc_net_pton(int af, const char *src, void *dst); +#undef inet_pton +#define inet_pton isc_net_pton +#endif + +#ifdef ISC_PLATFORM_NEEDATON +int +isc_net_aton(const char *cp, struct in_addr *addr); +#define inet_aton isc_net_aton +#endif + +ISC_LANG_ENDDECLS + +#endif /* ISC_NET_H */ |