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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef prnetdb_h___
#define prnetdb_h___
#include "prtypes.h"
#include "prio.h"
PR_BEGIN_EXTERN_C
/*
*********************************************************************
* Translate an Internet address to/from a character string
*********************************************************************
*/
NSPR_API(PRStatus) PR_StringToNetAddr(
const char *string, PRNetAddr *addr);
NSPR_API(PRStatus) PR_NetAddrToString(
const PRNetAddr *addr, char *string, PRUint32 size);
/*
** Structures returned by network data base library. All addresses are
** supplied in host order, and returned in network order (suitable for
** use in system calls).
*/
/*
** Beware that WINSOCK.H defines h_addrtype and h_length as short.
** Client code does direct struct copies of hostent to PRHostEnt and
** hence the ifdef.
*/
typedef struct PRHostEnt {
char *h_name; /* official name of host */
char **h_aliases; /* alias list */
#ifdef WIN32
PRInt16 h_addrtype; /* host address type */
PRInt16 h_length; /* length of address */
#else
PRInt32 h_addrtype; /* host address type */
PRInt32 h_length; /* length of address */
#endif
char **h_addr_list; /* list of addresses from name server */
} PRHostEnt;
/* A safe size to use that will mostly work... */
#if (defined(AIX) && defined(_THREAD_SAFE))
#define PR_NETDB_BUF_SIZE sizeof(struct protoent_data)
#else
#define PR_NETDB_BUF_SIZE 1024
#endif
/***********************************************************************
** FUNCTION:
** DESCRIPTION: PR_GetHostByName()
** Lookup a host by name.
**
** INPUTS:
** char *hostname Character string defining the host name of interest
** char *buf A scratch buffer for the runtime to return result.
** This buffer is allocated by the caller.
** PRIntn bufsize Number of bytes in 'buf'. A recommnded value to
** use is PR_NETDB_BUF_SIZE.
** OUTPUTS:
** PRHostEnt *hostentry
** This structure is filled in by the runtime if
** the function returns PR_SUCCESS. This structure
** is allocated by the caller.
** RETURN:
** PRStatus PR_SUCCESS if the lookup succeeds. If it fails
** the result will be PR_FAILURE and the reason
** for the failure can be retrieved by PR_GetError().
***********************************************************************/
NSPR_API(PRStatus) PR_GetHostByName(
const char *hostname, char *buf, PRIntn bufsize, PRHostEnt *hostentry);
/***********************************************************************
** FUNCTION:
** DESCRIPTION: PR_GetIPNodeByName()
** Lookup a host by name. Equivalent to getipnodebyname(AI_DEFAULT)
** of RFC 2553.
**
** INPUTS:
** char *hostname Character string defining the host name of interest
** PRUint16 af Address family (either PR_AF_INET or PR_AF_INET6)
** PRIntn flags Specifies the types of addresses that are searched
** for and the types of addresses that are returned.
** The only supported flag is PR_AI_DEFAULT.
** char *buf A scratch buffer for the runtime to return result.
** This buffer is allocated by the caller.
** PRIntn bufsize Number of bytes in 'buf'. A recommnded value to
** use is PR_NETDB_BUF_SIZE.
** OUTPUTS:
** PRHostEnt *hostentry
** This structure is filled in by the runtime if
** the function returns PR_SUCCESS. This structure
** is allocated by the caller.
** RETURN:
** PRStatus PR_SUCCESS if the lookup succeeds. If it fails
** the result will be PR_FAILURE and the reason
** for the failure can be retrieved by PR_GetError().
***********************************************************************/
#define PR_AI_ALL 0x08
#define PR_AI_V4MAPPED 0x10
#define PR_AI_ADDRCONFIG 0x20
#define PR_AI_NOCANONNAME 0x8000
#define PR_AI_DEFAULT (PR_AI_V4MAPPED | PR_AI_ADDRCONFIG)
NSPR_API(PRStatus) PR_GetIPNodeByName(
const char *hostname,
PRUint16 af,
PRIntn flags,
char *buf,
PRIntn bufsize,
PRHostEnt *hostentry);
/***********************************************************************
** FUNCTION:
** DESCRIPTION: PR_GetHostByAddr()
** Lookup a host entry by its network address.
**
** INPUTS:
** char *hostaddr IP address of host in question
** char *buf A scratch buffer for the runtime to return result.
** This buffer is allocated by the caller.
** PRIntn bufsize Number of bytes in 'buf'. A recommnded value to
** use is PR_NETDB_BUF_SIZE.
** OUTPUTS:
** PRHostEnt *hostentry
** This structure is filled in by the runtime if
** the function returns PR_SUCCESS. This structure
** is allocated by the caller.
** RETURN:
** PRStatus PR_SUCCESS if the lookup succeeds. If it fails
** the result will be PR_FAILURE and the reason
** for the failure can be retrieved by PR_GetError().
***********************************************************************/
NSPR_API(PRStatus) PR_GetHostByAddr(
const PRNetAddr *hostaddr, char *buf, PRIntn bufsize, PRHostEnt *hostentry);
/***********************************************************************
** FUNCTION: PR_EnumerateHostEnt()
** DESCRIPTION:
** A stateless enumerator over a PRHostEnt structure acquired from
** PR_GetHostByName() PR_GetHostByAddr() to evaluate the possible
** network addresses.
**
** INPUTS:
** PRIntn enumIndex Index of the enumeration. The enumeration starts
** and ends with a value of zero.
**
** PRHostEnt *hostEnt A pointer to a host entry struct that was
** previously returned by PR_GetHostByName() or
** PR_GetHostByAddr().
**
** PRUint16 port The port number to be assigned as part of the
** PRNetAddr.
**
** OUTPUTS:
** PRNetAddr *address A pointer to an address structure that will be
** filled in by the call to the enumeration if the
** result of the call is greater than zero.
**
** RETURN:
** PRIntn The value that should be used for the next call
** of the enumerator ('enumIndex'). The enumeration
** is ended if this value is returned zero.
** If a value of -1 is returned, the enumeration
** has failed. The reason for the failure can be
** retrieved by calling PR_GetError().
***********************************************************************/
NSPR_API(PRIntn) PR_EnumerateHostEnt(
PRIntn enumIndex, const PRHostEnt *hostEnt, PRUint16 port, PRNetAddr *address);
/***********************************************************************
** FUNCTION: PR_InitializeNetAddr(),
** DESCRIPTION:
** Initialize the fields of a PRNetAddr, assigning well known values as
** appropriate.
**
** INPUTS
** PRNetAddrValue val The value to be assigned to the IP Address portion
** of the network address. This can only specify the
** special well known values that are equivalent to
** INADDR_ANY and INADDR_LOOPBACK.
**
** PRUint16 port The port number to be assigned in the structure.
**
** OUTPUTS:
** PRNetAddr *addr The address to be manipulated.
**
** RETURN:
** PRStatus To indicate success or failure. If the latter, the
** reason for the failure can be retrieved by calling
** PR_GetError();
***********************************************************************/
typedef enum PRNetAddrValue
{
PR_IpAddrNull, /* do NOT overwrite the IP address */
PR_IpAddrAny, /* assign logical INADDR_ANY to IP address */
PR_IpAddrLoopback, /* assign logical INADDR_LOOPBACK */
PR_IpAddrV4Mapped /* IPv4 mapped address */
} PRNetAddrValue;
NSPR_API(PRStatus) PR_InitializeNetAddr(
PRNetAddrValue val, PRUint16 port, PRNetAddr *addr);
/***********************************************************************
** FUNCTION: PR_SetNetAddr(),
** DESCRIPTION:
** Set the fields of a PRNetAddr, assigning well known values as
** appropriate. This function is similar to PR_InitializeNetAddr
** but differs in that the address family is specified.
**
** INPUTS
** PRNetAddrValue val The value to be assigned to the IP Address portion
** of the network address. This can only specify the
** special well known values that are equivalent to
** INADDR_ANY and INADDR_LOOPBACK.
**
** PRUint16 af The address family (either PR_AF_INET or PR_AF_INET6)
**
** PRUint16 port The port number to be assigned in the structure.
**
** OUTPUTS:
** PRNetAddr *addr The address to be manipulated.
**
** RETURN:
** PRStatus To indicate success or failure. If the latter, the
** reason for the failure can be retrieved by calling
** PR_GetError();
***********************************************************************/
NSPR_API(PRStatus) PR_SetNetAddr(
PRNetAddrValue val, PRUint16 af, PRUint16 port, PRNetAddr *addr);
/***********************************************************************
** FUNCTION:
** DESCRIPTION: PR_IsNetAddrType()
** Determine if the network address is of the specified type.
**
** INPUTS:
** const PRNetAddr *addr A network address.
** PRNetAddrValue The type of network address
**
** RETURN:
** PRBool PR_TRUE if the network address is of the
** specified type, else PR_FALSE.
***********************************************************************/
NSPR_API(PRBool) PR_IsNetAddrType(const PRNetAddr *addr, PRNetAddrValue val);
/***********************************************************************
** FUNCTION:
** DESCRIPTION: PR_ConvertIPv4AddrToIPv6()
** Convert an IPv4 addr to an (IPv4-mapped) IPv6 addr
**
** INPUTS:
** PRUint32 v4addr IPv4 address
**
** OUTPUTS:
** PRIPv6Addr *v6addr The converted IPv6 address
**
** RETURN:
** void
**
***********************************************************************/
NSPR_API(void) PR_ConvertIPv4AddrToIPv6(PRUint32 v4addr, PRIPv6Addr *v6addr);
/***********************************************************************
** MACRO:
** DESCRIPTION: PR_NetAddrFamily()
** Get the 'family' field of a PRNetAddr union.
**
** INPUTS:
** const PRNetAddr *addr A network address.
**
** RETURN:
** PRUint16 The 'family' field of 'addr'.
***********************************************************************/
#define PR_NetAddrFamily(addr) ((addr)->raw.family)
/***********************************************************************
** MACRO:
** DESCRIPTION: PR_NetAddrInetPort()
** Get the 'port' field of a PRNetAddr union.
**
** INPUTS:
** const PRNetAddr *addr A network address.
**
** RETURN:
** PRUint16 The 'port' field of 'addr'.
***********************************************************************/
#define PR_NetAddrInetPort(addr) \
((addr)->raw.family == PR_AF_INET6 ? (addr)->ipv6.port : (addr)->inet.port)
/***********************************************************************
** FUNCTION:
** DESCRIPTION: PR_GetProtoByName()
** Lookup a protocol entry based on protocol's name
**
** INPUTS:
** char *protocolname Character string of the protocol's name.
** char *buf A scratch buffer for the runtime to return result.
** This buffer is allocated by the caller.
** PRIntn bufsize Number of bytes in 'buf'. A recommnded value to
** use is PR_NETDB_BUF_SIZE.
** OUTPUTS:
** PRHostEnt *PRProtoEnt
** This structure is filled in by the runtime if
** the function returns PR_SUCCESS. This structure
** is allocated by the caller.
** RETURN:
** PRStatus PR_SUCCESS if the lookup succeeds. If it fails
** the result will be PR_FAILURE and the reason
** for the failure can be retrieved by PR_GetError().
***********************************************************************/
typedef struct PRProtoEnt {
char *p_name; /* official protocol name */
char **p_aliases; /* alias list */
#ifdef WIN32
PRInt16 p_num; /* protocol # */
#else
PRInt32 p_num; /* protocol # */
#endif
} PRProtoEnt;
NSPR_API(PRStatus) PR_GetProtoByName(
const char* protocolname, char* buffer, PRInt32 bufsize, PRProtoEnt* result);
/***********************************************************************
** FUNCTION:
** DESCRIPTION: PR_GetProtoByNumber()
** Lookup a protocol entry based on protocol's number
**
** INPUTS:
** PRInt32 protocolnumber
** Number assigned to the protocol.
** char *buf A scratch buffer for the runtime to return result.
** This buffer is allocated by the caller.
** PRIntn bufsize Number of bytes in 'buf'. A recommnded value to
** use is PR_NETDB_BUF_SIZE.
** OUTPUTS:
** PRHostEnt *PRProtoEnt
** This structure is filled in by the runtime if
** the function returns PR_SUCCESS. This structure
** is allocated by the caller.
** RETURN:
** PRStatus PR_SUCCESS if the lookup succeeds. If it fails
** the result will be PR_FAILURE and the reason
** for the failure can be retrieved by PR_GetError().
***********************************************************************/
NSPR_API(PRStatus) PR_GetProtoByNumber(
PRInt32 protocolnumber, char* buffer, PRInt32 bufsize, PRProtoEnt* result);
/***********************************************************************
** FUNCTION:
** DESCRIPTION: PR_GetAddrInfoByName()
** Look up a host by name. Equivalent to getaddrinfo(host, NULL, ...) of
** RFC 3493.
**
** INPUTS:
** char *hostname Character string defining the host name of interest
** PRUint16 af May be PR_AF_UNSPEC or PR_AF_INET.
** PRIntn flags May be either PR_AI_ADDRCONFIG or
** PR_AI_ADDRCONFIG | PR_AI_NOCANONNAME. Include
** PR_AI_NOCANONNAME to suppress the determination of
** the canonical name corresponding to hostname.
** RETURN:
** PRAddrInfo* Handle to a data structure containing the results
** of the host lookup. Use PR_EnumerateAddrInfo to
** inspect the PRNetAddr values stored in this object.
** When no longer needed, this handle must be destroyed
** with a call to PR_FreeAddrInfo. If a lookup error
** occurs, then NULL will be returned.
***********************************************************************/
typedef struct PRAddrInfo PRAddrInfo;
NSPR_API(PRAddrInfo*) PR_GetAddrInfoByName(
const char *hostname, PRUint16 af, PRIntn flags);
/***********************************************************************
** FUNCTION:
** DESCRIPTION: PR_FreeAddrInfo()
** Destroy the PRAddrInfo handle allocated by PR_GetAddrInfoByName().
**
** INPUTS:
** PRAddrInfo *addrInfo
** The handle resulting from a successful call to
** PR_GetAddrInfoByName().
** RETURN:
** void
***********************************************************************/
NSPR_API(void) PR_FreeAddrInfo(PRAddrInfo *addrInfo);
/***********************************************************************
** FUNCTION:
** DESCRIPTION: PR_EnumerateAddrInfo()
** A stateless enumerator over a PRAddrInfo handle acquired from
** PR_GetAddrInfoByName() to inspect the possible network addresses.
**
** INPUTS:
** void *enumPtr Index pointer of the enumeration. The enumeration
** starts and ends with a value of NULL.
** const PRAddrInfo *addrInfo
** The PRAddrInfo handle returned by a successful
** call to PR_GetAddrInfoByName().
** PRUint16 port The port number to be assigned as part of the
** PRNetAddr.
** OUTPUTS:
** PRNetAddr *result A pointer to an address structure that will be
** filled in by the call to the enumeration if the
** result of the call is not NULL.
** RETURN:
** void* The value that should be used for the next call
** of the enumerator ('enumPtr'). The enumeration
** is ended if this value is NULL.
***********************************************************************/
NSPR_API(void *) PR_EnumerateAddrInfo(
void *enumPtr, const PRAddrInfo *addrInfo, PRUint16 port, PRNetAddr *result);
/***********************************************************************
** FUNCTION:
** DESCRIPTION: PR_GetCanonNameFromAddrInfo()
** Extracts the canonical name of the hostname passed to
** PR_GetAddrInfoByName().
**
** INPUTS:
** const PRAddrInfo *addrInfo
** The PRAddrInfo handle returned by a successful
** call to PR_GetAddrInfoByName().
** RETURN:
** const char * A const pointer to the canonical hostname stored
** in the given PRAddrInfo handle. This pointer is
** invalidated once the PRAddrInfo handle is destroyed
** by a call to PR_FreeAddrInfo().
***********************************************************************/
NSPR_API(const char *) PR_GetCanonNameFromAddrInfo(
const PRAddrInfo *addrInfo);
/***********************************************************************
** FUNCTIONS: PR_ntohs, PR_ntohl, PR_ntohll, PR_htons, PR_htonl, PR_htonll
**
** DESCRIPTION: API entries for the common byte ordering routines.
**
** PR_ntohs 16 bit conversion from network to host
** PR_ntohl 32 bit conversion from network to host
** PR_ntohll 64 bit conversion from network to host
** PR_htons 16 bit conversion from host to network
** PR_htonl 32 bit conversion from host to network
** PR_ntonll 64 bit conversion from host to network
**
***********************************************************************/
NSPR_API(PRUint16) PR_ntohs(PRUint16);
NSPR_API(PRUint32) PR_ntohl(PRUint32);
NSPR_API(PRUint64) PR_ntohll(PRUint64);
NSPR_API(PRUint16) PR_htons(PRUint16);
NSPR_API(PRUint32) PR_htonl(PRUint32);
NSPR_API(PRUint64) PR_htonll(PRUint64);
PR_END_EXTERN_C
#endif /* prnetdb_h___ */