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-rw-r--r--pjlib/include/pj/sock.h1400
1 files changed, 700 insertions, 700 deletions
diff --git a/pjlib/include/pj/sock.h b/pjlib/include/pj/sock.h
index ebadcf38..02d88c1e 100644
--- a/pjlib/include/pj/sock.h
+++ b/pjlib/include/pj/sock.h
@@ -1,700 +1,700 @@
-/* $Id$ */
-/*
- * Copyright (C)2003-2006 Benny Prijono <benny@prijono.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-#ifndef __PJ_SOCK_H__
-#define __PJ_SOCK_H__
-
-/**
- * @file sock.h
- * @brief Socket Abstraction.
- */
-
-#include <pj/types.h>
-
-PJ_BEGIN_DECL
-
-
-/**
- * @defgroup PJ_SOCK Socket Abstraction
- * @ingroup PJ_IO
- * @{
- *
- * The PJLIB socket abstraction layer is a thin and very portable abstraction
- * for socket API. It provides API similar to BSD socket API. The abstraction
- * is needed because BSD socket API is not always available on all platforms,
- * therefore it wouldn't be possible to create a trully portable network
- * programs unless we provide such abstraction.
- *
- * Applications can use this API directly in their application, just
- * as they would when using traditional BSD socket API, provided they
- * call #pj_init() first.
- *
- * \section pj_sock_examples_sec Examples
- *
- * For some examples on how to use the socket API, please see:
- *
- * - \ref page_pjlib_sock_test
- * - \ref page_pjlib_select_test
- * - \ref page_pjlib_sock_perf_test
- */
-
-
-/**
- * Supported address families.
- * APPLICATION MUST USE THESE VALUES INSTEAD OF NORMAL AF_*, BECAUSE
- * THE LIBRARY WILL DO TRANSLATION TO THE NATIVE VALUE.
- */
-extern const pj_uint16_t PJ_AF_UNIX; /**< Unix domain socket. */
-#define PJ_AF_LOCAL PJ_AF_UNIX; /**< POSIX name for AF_UNIX */
-extern const pj_uint16_t PJ_AF_INET; /**< Internet IP protocol. */
-extern const pj_uint16_t PJ_AF_INET6; /**< IP version 6. */
-extern const pj_uint16_t PJ_AF_PACKET; /**< Packet family. */
-extern const pj_uint16_t PJ_AF_IRDA; /**< IRDA sockets. */
-
-
-/**
- * Supported types of sockets.
- * APPLICATION MUST USE THESE VALUES INSTEAD OF NORMAL SOCK_*, BECAUSE
- * THE LIBRARY WILL TRANSLATE THE VALUE TO THE NATIVE VALUE.
- */
-
-extern const pj_uint16_t PJ_SOCK_STREAM; /**< Sequenced, reliable, connection-
- based byte streams. */
-extern const pj_uint16_t PJ_SOCK_DGRAM; /**< Connectionless, unreliable
- datagrams of fixed maximum
- lengths. */
-extern const pj_uint16_t PJ_SOCK_RAW; /**< Raw protocol interface. */
-extern const pj_uint16_t PJ_SOCK_RDM; /**< Reliably-delivered messages. */
-
-
-/**
- * Socket level specified in #pj_sock_setsockopt() or #pj_sock_getsockopt().
- * APPLICATION MUST USE THESE VALUES INSTEAD OF NORMAL SOL_*, BECAUSE
- * THE LIBRARY WILL TRANSLATE THE VALUE TO THE NATIVE VALUE.
- */
-extern const pj_uint16_t PJ_SOL_SOCKET; /**< Socket level. */
-extern const pj_uint16_t PJ_SOL_IP; /**< IP level. */
-extern const pj_uint16_t PJ_SOL_TCP; /**< TCP level. */
-extern const pj_uint16_t PJ_SOL_UDP; /**< UDP level. */
-extern const pj_uint16_t PJ_SOL_IPV6; /**< IP version 6 */
-
-/**
- * Values to be specified as \c optname when calling #pj_sock_setsockopt()
- * or #pj_sock_getsockopt().
- */
-extern const pj_uint16_t PJ_SO_TYPE; /**< Socket type. */
-extern const pj_uint16_t PJ_SO_RCVBUF; /**< Buffer size for receive. */
-extern const pj_uint16_t PJ_SO_SNDBUF; /**< Buffer size for send. */
-
-
-/**
- * Flags to be specified in #pj_sock_recv, #pj_sock_send, etc.
- */
-typedef enum pj_sock_msg_flag
-{
- PJ_MSG_OOB = 0x01, /**< Out-of-band messages. */
- PJ_MSG_PEEK = 0x02, /**< Peek, don't remove from buffer. */
- PJ_MSG_DONTROUTE = 0x04, /**< Don't route. */
-} pj_sock_msg_flag;
-
-
-/**
- * Flag to be specified in #pj_sock_shutdown.
- */
-typedef enum pj_socket_sd_type
-{
- PJ_SD_RECEIVE = 0, /**< No more receive. */
- PJ_SHUT_RD = 0, /**< Alias for SD_RECEIVE. */
- PJ_SD_SEND = 1, /**< No more sending. */
- PJ_SHUT_WR = 1, /**< Alias for SD_SEND. */
- PJ_SD_BOTH = 2, /**< No more send and receive. */
- PJ_SHUT_RDWR = 2, /**< Alias for SD_BOTH. */
-} pj_socket_sd_type;
-
-
-
-/** Address to accept any incoming messages. */
-#define PJ_INADDR_ANY ((pj_uint32_t)0)
-
-/** Address indicating an error return */
-#define PJ_INADDR_NONE ((pj_uint32_t)0xffffffff)
-
-/** Address to send to all hosts. */
-#define PJ_INADDR_BROADCAST ((pj_uint32_t)0xffffffff)
-
-
-/**
- * Maximum length specifiable by #pj_sock_listen().
- * If the build system doesn't override this value, then the lowest
- * denominator (five, in Win32 systems) will be used.
- */
-#if !defined(PJ_SOMAXCONN)
-# define PJ_SOMAXCONN 5
-#endif
-
-
-/**
- * Constant for invalid socket returned by #pj_sock_socket() and
- * #pj_sock_accept().
- */
-#define PJ_INVALID_SOCKET (-1)
-
-/**
- * Structure describing a generic socket address.
- */
-typedef struct pj_sockaddr
-{
- pj_uint16_t sa_family; /**< Common data: address family. */
- char sa_data[14]; /**< Address data. */
-} pj_sockaddr;
-
-
-/**
- * This structure describes Internet address.
- */
-typedef struct pj_in_addr
-{
- pj_uint32_t s_addr; /**< The 32bit IP address. */
-} pj_in_addr;
-
-
-/**
- * This structure describes Internet socket address.
- */
-typedef struct pj_sockaddr_in
-{
- pj_uint16_t sin_family; /**< Address family. */
- pj_uint16_t sin_port; /**< Transport layer port number. */
- pj_in_addr sin_addr; /**< IP address. */
- char sin_zero[8]; /**< Padding. */
-} pj_sockaddr_in;
-
-
-/**
- * This structure describes IPv6 address.
- */
-typedef struct pj_in6_addr
-{
- /** Union of address formats. */
- union {
- pj_uint8_t u6_addr8[16]; /**< u6_addr8 */
- pj_uint16_t u6_addr16[8]; /**< u6_addr16 */
- pj_uint32_t u6_addr32[4]; /**< u6_addr32 */
- } in6_u;
-/** Shortcut to access in6_u.u6_addr8. */
-#define s6_addr in6_u.u6_addr8
-/** Shortcut to access in6_u.u6_addr16. */
-#define s6_addr16 in6_u.u6_addr16
-/** Shortcut to access in6_u.u6_addr32. */
-#define s6_addr32 in6_u.u6_addr32
-} pj_in6_addr;
-
-/** Initializer value for pj_in6_addr. */
-#define PJ_IN6ADDR_ANY_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } } }
-
-/** Initializer value for pj_in6_addr. */
-#define PJ_IN6ADDR_LOOPBACK_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } }
-
-/**
- * This structure describes IPv6 socket address.
- */
-typedef struct pj_sockaddr_in6
-{
- pj_uint16_t sin6_family; /**< Address family */
- pj_uint16_t sin6_port; /**< Transport layer port number. */
- pj_uint32_t sin6_flowinfo; /**< IPv6 flow information */
- pj_in6_addr sin6_addr; /**< IPv6 address. */
- pj_uint32_t sin6_scope_id; /**< IPv6 scope-id */
-} pj_sockaddr_in6;
-
-
-/*****************************************************************************
- *
- * SOCKET ADDRESS MANIPULATION.
- *
- *****************************************************************************
- */
-
-/**
- * Convert 16-bit value from network byte order to host byte order.
- *
- * @param netshort 16-bit network value.
- * @return 16-bit host value.
- */
-PJ_DECL(pj_uint16_t) pj_ntohs(pj_uint16_t netshort);
-
-/**
- * Convert 16-bit value from host byte order to network byte order.
- *
- * @param hostshort 16-bit host value.
- * @return 16-bit network value.
- */
-PJ_DECL(pj_uint16_t) pj_htons(pj_uint16_t hostshort);
-
-/**
- * Convert 32-bit value from network byte order to host byte order.
- *
- * @param netlong 32-bit network value.
- * @return 32-bit host value.
- */
-PJ_DECL(pj_uint32_t) pj_ntohl(pj_uint32_t netlong);
-
-/**
- * Convert 32-bit value from host byte order to network byte order.
- *
- * @param hostlong 32-bit host value.
- * @return 32-bit network value.
- */
-PJ_DECL(pj_uint32_t) pj_htonl(pj_uint32_t hostlong);
-
-/**
- * Convert an Internet host address given in network byte order
- * to string in standard numbers and dots notation.
- *
- * @param inaddr The host address.
- * @return The string address.
- */
-PJ_DECL(char*) pj_inet_ntoa(pj_in_addr inaddr);
-
-/**
- * This function converts the Internet host address cp from the standard
- * numbers-and-dots notation into binary data and stores it in the structure
- * that inp points to.
- *
- * @param cp IP address in standard numbers-and-dots notation.
- * @param inp Structure that holds the output of the conversion.
- *
- * @return nonzero if the address is valid, zero if not.
- */
-PJ_DECL(int) pj_inet_aton(const pj_str_t *cp, struct pj_in_addr *inp);
-
-/**
- * Convert address string with numbers and dots to binary IP address.
- *
- * @param cp The IP address in numbers and dots notation.
- * @return If success, the IP address is returned in network
- * byte order. If failed, PJ_INADDR_NONE will be
- * returned.
- * @remark
- * This is an obsolete interface to #pj_inet_aton(); it is obsolete
- * because -1 is a valid address (255.255.255.255), and #pj_inet_aton()
- * provides a cleaner way to indicate error return.
- */
-PJ_DECL(pj_in_addr) pj_inet_addr(const pj_str_t *cp);
-
-
-/**
- * Get the transport layer port number of an Internet socket address.
- * The port is returned in host byte order.
- *
- * @param addr The IP socket address.
- * @return Port number, in host byte order.
- */
-PJ_INLINE(pj_uint16_t) pj_sockaddr_in_get_port(const pj_sockaddr_in *addr)
-{
- return pj_ntohs(addr->sin_port);
-}
-
-/**
- * Set the port number of an Internet socket address.
- *
- * @param addr The IP socket address.
- * @param hostport The port number, in host byte order.
- */
-PJ_INLINE(void) pj_sockaddr_in_set_port(pj_sockaddr_in *addr,
- pj_uint16_t hostport)
-{
- addr->sin_port = pj_htons(hostport);
-}
-
-/**
- * Get the IP address of an Internet socket address.
- * The address is returned as 32bit value in host byte order.
- *
- * @param addr The IP socket address.
- * @return 32bit address, in host byte order.
- */
-PJ_INLINE(pj_in_addr) pj_sockaddr_in_get_addr(const pj_sockaddr_in *addr)
-{
- pj_in_addr in_addr;
- in_addr.s_addr = pj_ntohl(addr->sin_addr.s_addr);
- return in_addr;
-};
-
-/**
- * Set the IP address of an Internet socket address.
- *
- * @param addr The IP socket address.
- * @param hostaddr The host address, in host byte order.
- */
-PJ_INLINE(void) pj_sockaddr_in_set_addr(pj_sockaddr_in *addr,
- pj_uint32_t hostaddr)
-{
- addr->sin_addr.s_addr = pj_htonl(hostaddr);
-}
-
-/**
- * Set the IP address of an IP socket address from string address,
- * with resolving the host if necessary. The string address may be in a
- * standard numbers and dots notation or may be a hostname. If hostname
- * is specified, then the function will resolve the host into the IP
- * address.
- *
- * @param addr The IP socket address to be set.
- * @param cp The address string, which can be in a standard
- * dotted numbers or a hostname to be resolved.
- *
- * @return Zero on success.
- */
-PJ_DECL(pj_status_t) pj_sockaddr_in_set_str_addr( pj_sockaddr_in *addr,
- const pj_str_t *cp);
-
-/**
- * Set the IP address and port of an IP socket address.
- * The string address may be in a standard numbers and dots notation or
- * may be a hostname. If hostname is specified, then the function will
- * resolve the host into the IP address.
- *
- * @param addr The IP socket address to be set.
- * @param cp The address string, which can be in a standard
- * dotted numbers or a hostname to be resolved.
- * @param port The port number, in host byte order.
- *
- * @return Zero on success.
- */
-PJ_DECL(pj_status_t) pj_sockaddr_in_init( pj_sockaddr_in *addr,
- const pj_str_t *cp,
- pj_uint16_t port);
-
-
-/*****************************************************************************
- *
- * HOST NAME AND ADDRESS.
- *
- *****************************************************************************
- */
-
-/**
- * Get system's host name.
- *
- * @return The hostname, or empty string if the hostname can not
- * be identified.
- */
-PJ_DECL(const pj_str_t*) pj_gethostname(void);
-
-/**
- * Get host's IP address, which the the first IP address that is resolved
- * from the hostname.
- *
- * @return The host's IP address, PJ_INADDR_NONE if the host
- * IP address can not be identified.
- */
-PJ_DECL(pj_in_addr) pj_gethostaddr(void);
-
-
-/*****************************************************************************
- *
- * SOCKET API.
- *
- *****************************************************************************
- */
-
-/**
- * Create new socket/endpoint for communication.
- *
- * @param family Specifies a communication domain; this selects the
- * protocol family which will be used for communication.
- * @param type The socket has the indicated type, which specifies the
- * communication semantics.
- * @param protocol Specifies a particular protocol to be used with the
- * socket. Normally only a single protocol exists to support
- * a particular socket type within a given protocol family,
- * in which a case protocol can be specified as 0.
- * @param sock New socket descriptor, or PJ_INVALID_SOCKET on error.
- *
- * @return Zero on success.
- */
-PJ_DECL(pj_status_t) pj_sock_socket(int family,
- int type,
- int protocol,
- pj_sock_t *sock);
-
-/**
- * Close the socket descriptor.
- *
- * @param sockfd The socket descriptor.
- *
- * @return Zero on success.
- */
-PJ_DECL(pj_status_t) pj_sock_close(pj_sock_t sockfd);
-
-
-/**
- * This function gives the socket sockfd the local address my_addr. my_addr is
- * addrlen bytes long. Traditionally, this is called assigning a name to
- * a socket. When a socket is created with #pj_sock_socket(), it exists in a
- * name space (address family) but has no name assigned.
- *
- * @param sockfd The socket desriptor.
- * @param my_addr The local address to bind the socket to.
- * @param addrlen The length of the address.
- *
- * @return Zero on success.
- */
-PJ_DECL(pj_status_t) pj_sock_bind( pj_sock_t sockfd,
- const pj_sockaddr_t *my_addr,
- int addrlen);
-
-/**
- * Bind the IP socket sockfd to the given address and port.
- *
- * @param sockfd The socket descriptor.
- * @param addr Local address to bind the socket to, in host byte order.
- * @param port The local port to bind the socket to, in host byte order.
- *
- * @return Zero on success.
- */
-PJ_DECL(pj_status_t) pj_sock_bind_in( pj_sock_t sockfd,
- pj_uint32_t addr,
- pj_uint16_t port);
-
-#if PJ_HAS_TCP
-/**
- * Listen for incoming connection. This function only applies to connection
- * oriented sockets (such as PJ_SOCK_STREAM or PJ_SOCK_SEQPACKET), and it
- * indicates the willingness to accept incoming connections.
- *
- * @param sockfd The socket descriptor.
- * @param backlog Defines the maximum length the queue of pending
- * connections may grow to.
- *
- * @return Zero on success.
- */
-PJ_DECL(pj_status_t) pj_sock_listen( pj_sock_t sockfd,
- int backlog );
-
-/**
- * Accept new connection on the specified connection oriented server socket.
- *
- * @param serverfd The server socket.
- * @param newsock New socket on success, of PJ_INVALID_SOCKET if failed.
- * @param addr A pointer to sockaddr type. If the argument is not NULL,
- * it will be filled by the address of connecting entity.
- * @param addrlen Initially specifies the length of the address, and upon
- * return will be filled with the exact address length.
- *
- * @return Zero on success, or the error number.
- */
-PJ_DECL(pj_status_t) pj_sock_accept( pj_sock_t serverfd,
- pj_sock_t *newsock,
- pj_sockaddr_t *addr,
- int *addrlen);
-#endif
-
-/**
- * The file descriptor sockfd must refer to a socket. If the socket is of
- * type PJ_SOCK_DGRAM then the serv_addr address is the address to which
- * datagrams are sent by default, and the only address from which datagrams
- * are received. If the socket is of type PJ_SOCK_STREAM or PJ_SOCK_SEQPACKET,
- * this call attempts to make a connection to another socket. The
- * other socket is specified by serv_addr, which is an address (of length
- * addrlen) in the communications space of the socket. Each communications
- * space interprets the serv_addr parameter in its own way.
- *
- * @param sockfd The socket descriptor.
- * @param serv_addr Server address to connect to.
- * @param addrlen The length of server address.
- *
- * @return Zero on success.
- */
-PJ_DECL(pj_status_t) pj_sock_connect( pj_sock_t sockfd,
- const pj_sockaddr_t *serv_addr,
- int addrlen);
-
-/**
- * Return the address of peer which is connected to socket sockfd.
- *
- * @param sockfd The socket descriptor.
- * @param addr Pointer to sockaddr structure to which the address
- * will be returned.
- * @param namelen Initially the length of the addr. Upon return the value
- * will be set to the actual length of the address.
- *
- * @return Zero on success.
- */
-PJ_DECL(pj_status_t) pj_sock_getpeername(pj_sock_t sockfd,
- pj_sockaddr_t *addr,
- int *namelen);
-
-/**
- * Return the current name of the specified socket.
- *
- * @param sockfd The socket descriptor.
- * @param addr Pointer to sockaddr structure to which the address
- * will be returned.
- * @param namelen Initially the length of the addr. Upon return the value
- * will be set to the actual length of the address.
- *
- * @return Zero on success.
- */
-PJ_DECL(pj_status_t) pj_sock_getsockname( pj_sock_t sockfd,
- pj_sockaddr_t *addr,
- int *namelen);
-
-/**
- * Get socket option associated with a socket. Options may exist at multiple
- * protocol levels; they are always present at the uppermost socket level.
- *
- * @param sockfd The socket descriptor.
- * @param level The level which to get the option from.
- * @param optname The option name.
- * @param optval Identifies the buffer which the value will be
- * returned.
- * @param optlen Initially contains the length of the buffer, upon
- * return will be set to the actual size of the value.
- *
- * @return Zero on success.
- */
-PJ_DECL(pj_status_t) pj_sock_getsockopt( pj_sock_t sockfd,
- pj_uint16_t level,
- pj_uint16_t optname,
- void *optval,
- int *optlen);
-/**
- * Manipulate the options associated with a socket. Options may exist at
- * multiple protocol levels; they are always present at the uppermost socket
- * level.
- *
- * @param sockfd The socket descriptor.
- * @param level The level which to get the option from.
- * @param optname The option name.
- * @param optval Identifies the buffer which contain the value.
- * @param optlen The length of the value.
- *
- * @return PJ_SUCCESS or the status code.
- */
-PJ_DECL(pj_status_t) pj_sock_setsockopt( pj_sock_t sockfd,
- pj_uint16_t level,
- pj_uint16_t optname,
- const void *optval,
- int optlen);
-
-
-/**
- * Receives data stream or message coming to the specified socket.
- *
- * @param sockfd The socket descriptor.
- * @param buf The buffer to receive the data or message.
- * @param len On input, the length of the buffer. On return,
- * contains the length of data received.
- * @param flags Combination of #pj_sock_msg_flag.
- *
- * @return PJ_SUCCESS or the error code.
- */
-PJ_DECL(pj_status_t) pj_sock_recv(pj_sock_t sockfd,
- void *buf,
- pj_ssize_t *len,
- unsigned flags);
-
-/**
- * Receives data stream or message coming to the specified socket.
- *
- * @param sockfd The socket descriptor.
- * @param buf The buffer to receive the data or message.
- * @param len On input, the length of the buffer. On return,
- * contains the length of data received.
- * @param flags Bitmask combination of #pj_sock_msg_flag.
- * @param from If not NULL, it will be filled with the source
- * address of the connection.
- * @param fromlen Initially contains the length of from address,
- * and upon return will be filled with the actual
- * length of the address.
- *
- * @return PJ_SUCCESS or the error code.
- */
-PJ_DECL(pj_status_t) pj_sock_recvfrom( pj_sock_t sockfd,
- void *buf,
- pj_ssize_t *len,
- unsigned flags,
- pj_sockaddr_t *from,
- int *fromlen);
-
-/**
- * Transmit data to the socket.
- *
- * @param sockfd Socket descriptor.
- * @param buf Buffer containing data to be sent.
- * @param len On input, the length of the data in the buffer.
- * Upon return, it will be filled with the length
- * of data sent.
- * @param flags Bitmask combination of #pj_sock_msg_flag.
- *
- * @return PJ_SUCCESS or the status code.
- */
-PJ_DECL(pj_status_t) pj_sock_send(pj_sock_t sockfd,
- const void *buf,
- pj_ssize_t *len,
- unsigned flags);
-
-/**
- * Transmit data to the socket to the specified address.
- *
- * @param sockfd Socket descriptor.
- * @param buf Buffer containing data to be sent.
- * @param len On input, the length of the data in the buffer.
- * Upon return, it will be filled with the length
- * of data sent.
- * @param flags Bitmask combination of #pj_sock_msg_flag.
- * @param to The address to send.
- * @param tolen The length of the address in bytes.
- *
- * @return The length of data successfully sent.
- */
-PJ_DECL(pj_status_t) pj_sock_sendto(pj_sock_t sockfd,
- const void *buf,
- pj_ssize_t *len,
- unsigned flags,
- const pj_sockaddr_t *to,
- int tolen);
-
-#if PJ_HAS_TCP
-/**
- * The shutdown call causes all or part of a full-duplex connection on the
- * socket associated with sockfd to be shut down.
- *
- * @param sockfd The socket descriptor.
- * @param how If how is PJ_SHUT_RD, further receptions will be
- * disallowed. If how is PJ_SHUT_WR, further transmissions
- * will be disallowed. If how is PJ_SHUT_RDWR, further
- * receptions andtransmissions will be disallowed.
- *
- * @return Zero on success.
- */
-PJ_DECL(pj_status_t) pj_sock_shutdown( pj_sock_t sockfd,
- int how);
-#endif
-
-/**
- * @}
- */
-
-
-PJ_END_DECL
-
-#endif /* __PJ_SOCK_H__ */
-
+/* $Id$ */
+/*
+ * Copyright (C)2003-2006 Benny Prijono <benny@prijono.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#ifndef __PJ_SOCK_H__
+#define __PJ_SOCK_H__
+
+/**
+ * @file sock.h
+ * @brief Socket Abstraction.
+ */
+
+#include <pj/types.h>
+
+PJ_BEGIN_DECL
+
+
+/**
+ * @defgroup PJ_SOCK Socket Abstraction
+ * @ingroup PJ_IO
+ * @{
+ *
+ * The PJLIB socket abstraction layer is a thin and very portable abstraction
+ * for socket API. It provides API similar to BSD socket API. The abstraction
+ * is needed because BSD socket API is not always available on all platforms,
+ * therefore it wouldn't be possible to create a trully portable network
+ * programs unless we provide such abstraction.
+ *
+ * Applications can use this API directly in their application, just
+ * as they would when using traditional BSD socket API, provided they
+ * call #pj_init() first.
+ *
+ * \section pj_sock_examples_sec Examples
+ *
+ * For some examples on how to use the socket API, please see:
+ *
+ * - \ref page_pjlib_sock_test
+ * - \ref page_pjlib_select_test
+ * - \ref page_pjlib_sock_perf_test
+ */
+
+
+/**
+ * Supported address families.
+ * APPLICATION MUST USE THESE VALUES INSTEAD OF NORMAL AF_*, BECAUSE
+ * THE LIBRARY WILL DO TRANSLATION TO THE NATIVE VALUE.
+ */
+extern const pj_uint16_t PJ_AF_UNIX; /**< Unix domain socket. */
+#define PJ_AF_LOCAL PJ_AF_UNIX; /**< POSIX name for AF_UNIX */
+extern const pj_uint16_t PJ_AF_INET; /**< Internet IP protocol. */
+extern const pj_uint16_t PJ_AF_INET6; /**< IP version 6. */
+extern const pj_uint16_t PJ_AF_PACKET; /**< Packet family. */
+extern const pj_uint16_t PJ_AF_IRDA; /**< IRDA sockets. */
+
+
+/**
+ * Supported types of sockets.
+ * APPLICATION MUST USE THESE VALUES INSTEAD OF NORMAL SOCK_*, BECAUSE
+ * THE LIBRARY WILL TRANSLATE THE VALUE TO THE NATIVE VALUE.
+ */
+
+extern const pj_uint16_t PJ_SOCK_STREAM; /**< Sequenced, reliable, connection-
+ based byte streams. */
+extern const pj_uint16_t PJ_SOCK_DGRAM; /**< Connectionless, unreliable
+ datagrams of fixed maximum
+ lengths. */
+extern const pj_uint16_t PJ_SOCK_RAW; /**< Raw protocol interface. */
+extern const pj_uint16_t PJ_SOCK_RDM; /**< Reliably-delivered messages. */
+
+
+/**
+ * Socket level specified in #pj_sock_setsockopt() or #pj_sock_getsockopt().
+ * APPLICATION MUST USE THESE VALUES INSTEAD OF NORMAL SOL_*, BECAUSE
+ * THE LIBRARY WILL TRANSLATE THE VALUE TO THE NATIVE VALUE.
+ */
+extern const pj_uint16_t PJ_SOL_SOCKET; /**< Socket level. */
+extern const pj_uint16_t PJ_SOL_IP; /**< IP level. */
+extern const pj_uint16_t PJ_SOL_TCP; /**< TCP level. */
+extern const pj_uint16_t PJ_SOL_UDP; /**< UDP level. */
+extern const pj_uint16_t PJ_SOL_IPV6; /**< IP version 6 */
+
+/**
+ * Values to be specified as \c optname when calling #pj_sock_setsockopt()
+ * or #pj_sock_getsockopt().
+ */
+extern const pj_uint16_t PJ_SO_TYPE; /**< Socket type. */
+extern const pj_uint16_t PJ_SO_RCVBUF; /**< Buffer size for receive. */
+extern const pj_uint16_t PJ_SO_SNDBUF; /**< Buffer size for send. */
+
+
+/**
+ * Flags to be specified in #pj_sock_recv, #pj_sock_send, etc.
+ */
+typedef enum pj_sock_msg_flag
+{
+ PJ_MSG_OOB = 0x01, /**< Out-of-band messages. */
+ PJ_MSG_PEEK = 0x02, /**< Peek, don't remove from buffer. */
+ PJ_MSG_DONTROUTE = 0x04, /**< Don't route. */
+} pj_sock_msg_flag;
+
+
+/**
+ * Flag to be specified in #pj_sock_shutdown.
+ */
+typedef enum pj_socket_sd_type
+{
+ PJ_SD_RECEIVE = 0, /**< No more receive. */
+ PJ_SHUT_RD = 0, /**< Alias for SD_RECEIVE. */
+ PJ_SD_SEND = 1, /**< No more sending. */
+ PJ_SHUT_WR = 1, /**< Alias for SD_SEND. */
+ PJ_SD_BOTH = 2, /**< No more send and receive. */
+ PJ_SHUT_RDWR = 2, /**< Alias for SD_BOTH. */
+} pj_socket_sd_type;
+
+
+
+/** Address to accept any incoming messages. */
+#define PJ_INADDR_ANY ((pj_uint32_t)0)
+
+/** Address indicating an error return */
+#define PJ_INADDR_NONE ((pj_uint32_t)0xffffffff)
+
+/** Address to send to all hosts. */
+#define PJ_INADDR_BROADCAST ((pj_uint32_t)0xffffffff)
+
+
+/**
+ * Maximum length specifiable by #pj_sock_listen().
+ * If the build system doesn't override this value, then the lowest
+ * denominator (five, in Win32 systems) will be used.
+ */
+#if !defined(PJ_SOMAXCONN)
+# define PJ_SOMAXCONN 5
+#endif
+
+
+/**
+ * Constant for invalid socket returned by #pj_sock_socket() and
+ * #pj_sock_accept().
+ */
+#define PJ_INVALID_SOCKET (-1)
+
+/**
+ * Structure describing a generic socket address.
+ */
+typedef struct pj_sockaddr
+{
+ pj_uint16_t sa_family; /**< Common data: address family. */
+ char sa_data[14]; /**< Address data. */
+} pj_sockaddr;
+
+
+/**
+ * This structure describes Internet address.
+ */
+typedef struct pj_in_addr
+{
+ pj_uint32_t s_addr; /**< The 32bit IP address. */
+} pj_in_addr;
+
+
+/**
+ * This structure describes Internet socket address.
+ */
+typedef struct pj_sockaddr_in
+{
+ pj_uint16_t sin_family; /**< Address family. */
+ pj_uint16_t sin_port; /**< Transport layer port number. */
+ pj_in_addr sin_addr; /**< IP address. */
+ char sin_zero[8]; /**< Padding. */
+} pj_sockaddr_in;
+
+
+/**
+ * This structure describes IPv6 address.
+ */
+typedef struct pj_in6_addr
+{
+ /** Union of address formats. */
+ union {
+ pj_uint8_t u6_addr8[16]; /**< u6_addr8 */
+ pj_uint16_t u6_addr16[8]; /**< u6_addr16 */
+ pj_uint32_t u6_addr32[4]; /**< u6_addr32 */
+ } in6_u;
+/** Shortcut to access in6_u.u6_addr8. */
+#define s6_addr in6_u.u6_addr8
+/** Shortcut to access in6_u.u6_addr16. */
+#define s6_addr16 in6_u.u6_addr16
+/** Shortcut to access in6_u.u6_addr32. */
+#define s6_addr32 in6_u.u6_addr32
+} pj_in6_addr;
+
+/** Initializer value for pj_in6_addr. */
+#define PJ_IN6ADDR_ANY_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } } }
+
+/** Initializer value for pj_in6_addr. */
+#define PJ_IN6ADDR_LOOPBACK_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } }
+
+/**
+ * This structure describes IPv6 socket address.
+ */
+typedef struct pj_sockaddr_in6
+{
+ pj_uint16_t sin6_family; /**< Address family */
+ pj_uint16_t sin6_port; /**< Transport layer port number. */
+ pj_uint32_t sin6_flowinfo; /**< IPv6 flow information */
+ pj_in6_addr sin6_addr; /**< IPv6 address. */
+ pj_uint32_t sin6_scope_id; /**< IPv6 scope-id */
+} pj_sockaddr_in6;
+
+
+/*****************************************************************************
+ *
+ * SOCKET ADDRESS MANIPULATION.
+ *
+ *****************************************************************************
+ */
+
+/**
+ * Convert 16-bit value from network byte order to host byte order.
+ *
+ * @param netshort 16-bit network value.
+ * @return 16-bit host value.
+ */
+PJ_DECL(pj_uint16_t) pj_ntohs(pj_uint16_t netshort);
+
+/**
+ * Convert 16-bit value from host byte order to network byte order.
+ *
+ * @param hostshort 16-bit host value.
+ * @return 16-bit network value.
+ */
+PJ_DECL(pj_uint16_t) pj_htons(pj_uint16_t hostshort);
+
+/**
+ * Convert 32-bit value from network byte order to host byte order.
+ *
+ * @param netlong 32-bit network value.
+ * @return 32-bit host value.
+ */
+PJ_DECL(pj_uint32_t) pj_ntohl(pj_uint32_t netlong);
+
+/**
+ * Convert 32-bit value from host byte order to network byte order.
+ *
+ * @param hostlong 32-bit host value.
+ * @return 32-bit network value.
+ */
+PJ_DECL(pj_uint32_t) pj_htonl(pj_uint32_t hostlong);
+
+/**
+ * Convert an Internet host address given in network byte order
+ * to string in standard numbers and dots notation.
+ *
+ * @param inaddr The host address.
+ * @return The string address.
+ */
+PJ_DECL(char*) pj_inet_ntoa(pj_in_addr inaddr);
+
+/**
+ * This function converts the Internet host address cp from the standard
+ * numbers-and-dots notation into binary data and stores it in the structure
+ * that inp points to.
+ *
+ * @param cp IP address in standard numbers-and-dots notation.
+ * @param inp Structure that holds the output of the conversion.
+ *
+ * @return nonzero if the address is valid, zero if not.
+ */
+PJ_DECL(int) pj_inet_aton(const pj_str_t *cp, struct pj_in_addr *inp);
+
+/**
+ * Convert address string with numbers and dots to binary IP address.
+ *
+ * @param cp The IP address in numbers and dots notation.
+ * @return If success, the IP address is returned in network
+ * byte order. If failed, PJ_INADDR_NONE will be
+ * returned.
+ * @remark
+ * This is an obsolete interface to #pj_inet_aton(); it is obsolete
+ * because -1 is a valid address (255.255.255.255), and #pj_inet_aton()
+ * provides a cleaner way to indicate error return.
+ */
+PJ_DECL(pj_in_addr) pj_inet_addr(const pj_str_t *cp);
+
+
+/**
+ * Get the transport layer port number of an Internet socket address.
+ * The port is returned in host byte order.
+ *
+ * @param addr The IP socket address.
+ * @return Port number, in host byte order.
+ */
+PJ_INLINE(pj_uint16_t) pj_sockaddr_in_get_port(const pj_sockaddr_in *addr)
+{
+ return pj_ntohs(addr->sin_port);
+}
+
+/**
+ * Set the port number of an Internet socket address.
+ *
+ * @param addr The IP socket address.
+ * @param hostport The port number, in host byte order.
+ */
+PJ_INLINE(void) pj_sockaddr_in_set_port(pj_sockaddr_in *addr,
+ pj_uint16_t hostport)
+{
+ addr->sin_port = pj_htons(hostport);
+}
+
+/**
+ * Get the IP address of an Internet socket address.
+ * The address is returned as 32bit value in host byte order.
+ *
+ * @param addr The IP socket address.
+ * @return 32bit address, in host byte order.
+ */
+PJ_INLINE(pj_in_addr) pj_sockaddr_in_get_addr(const pj_sockaddr_in *addr)
+{
+ pj_in_addr in_addr;
+ in_addr.s_addr = pj_ntohl(addr->sin_addr.s_addr);
+ return in_addr;
+};
+
+/**
+ * Set the IP address of an Internet socket address.
+ *
+ * @param addr The IP socket address.
+ * @param hostaddr The host address, in host byte order.
+ */
+PJ_INLINE(void) pj_sockaddr_in_set_addr(pj_sockaddr_in *addr,
+ pj_uint32_t hostaddr)
+{
+ addr->sin_addr.s_addr = pj_htonl(hostaddr);
+}
+
+/**
+ * Set the IP address of an IP socket address from string address,
+ * with resolving the host if necessary. The string address may be in a
+ * standard numbers and dots notation or may be a hostname. If hostname
+ * is specified, then the function will resolve the host into the IP
+ * address.
+ *
+ * @param addr The IP socket address to be set.
+ * @param cp The address string, which can be in a standard
+ * dotted numbers or a hostname to be resolved.
+ *
+ * @return Zero on success.
+ */
+PJ_DECL(pj_status_t) pj_sockaddr_in_set_str_addr( pj_sockaddr_in *addr,
+ const pj_str_t *cp);
+
+/**
+ * Set the IP address and port of an IP socket address.
+ * The string address may be in a standard numbers and dots notation or
+ * may be a hostname. If hostname is specified, then the function will
+ * resolve the host into the IP address.
+ *
+ * @param addr The IP socket address to be set.
+ * @param cp The address string, which can be in a standard
+ * dotted numbers or a hostname to be resolved.
+ * @param port The port number, in host byte order.
+ *
+ * @return Zero on success.
+ */
+PJ_DECL(pj_status_t) pj_sockaddr_in_init( pj_sockaddr_in *addr,
+ const pj_str_t *cp,
+ pj_uint16_t port);
+
+
+/*****************************************************************************
+ *
+ * HOST NAME AND ADDRESS.
+ *
+ *****************************************************************************
+ */
+
+/**
+ * Get system's host name.
+ *
+ * @return The hostname, or empty string if the hostname can not
+ * be identified.
+ */
+PJ_DECL(const pj_str_t*) pj_gethostname(void);
+
+/**
+ * Get host's IP address, which the the first IP address that is resolved
+ * from the hostname.
+ *
+ * @return The host's IP address, PJ_INADDR_NONE if the host
+ * IP address can not be identified.
+ */
+PJ_DECL(pj_in_addr) pj_gethostaddr(void);
+
+
+/*****************************************************************************
+ *
+ * SOCKET API.
+ *
+ *****************************************************************************
+ */
+
+/**
+ * Create new socket/endpoint for communication.
+ *
+ * @param family Specifies a communication domain; this selects the
+ * protocol family which will be used for communication.
+ * @param type The socket has the indicated type, which specifies the
+ * communication semantics.
+ * @param protocol Specifies a particular protocol to be used with the
+ * socket. Normally only a single protocol exists to support
+ * a particular socket type within a given protocol family,
+ * in which a case protocol can be specified as 0.
+ * @param sock New socket descriptor, or PJ_INVALID_SOCKET on error.
+ *
+ * @return Zero on success.
+ */
+PJ_DECL(pj_status_t) pj_sock_socket(int family,
+ int type,
+ int protocol,
+ pj_sock_t *sock);
+
+/**
+ * Close the socket descriptor.
+ *
+ * @param sockfd The socket descriptor.
+ *
+ * @return Zero on success.
+ */
+PJ_DECL(pj_status_t) pj_sock_close(pj_sock_t sockfd);
+
+
+/**
+ * This function gives the socket sockfd the local address my_addr. my_addr is
+ * addrlen bytes long. Traditionally, this is called assigning a name to
+ * a socket. When a socket is created with #pj_sock_socket(), it exists in a
+ * name space (address family) but has no name assigned.
+ *
+ * @param sockfd The socket desriptor.
+ * @param my_addr The local address to bind the socket to.
+ * @param addrlen The length of the address.
+ *
+ * @return Zero on success.
+ */
+PJ_DECL(pj_status_t) pj_sock_bind( pj_sock_t sockfd,
+ const pj_sockaddr_t *my_addr,
+ int addrlen);
+
+/**
+ * Bind the IP socket sockfd to the given address and port.
+ *
+ * @param sockfd The socket descriptor.
+ * @param addr Local address to bind the socket to, in host byte order.
+ * @param port The local port to bind the socket to, in host byte order.
+ *
+ * @return Zero on success.
+ */
+PJ_DECL(pj_status_t) pj_sock_bind_in( pj_sock_t sockfd,
+ pj_uint32_t addr,
+ pj_uint16_t port);
+
+#if PJ_HAS_TCP
+/**
+ * Listen for incoming connection. This function only applies to connection
+ * oriented sockets (such as PJ_SOCK_STREAM or PJ_SOCK_SEQPACKET), and it
+ * indicates the willingness to accept incoming connections.
+ *
+ * @param sockfd The socket descriptor.
+ * @param backlog Defines the maximum length the queue of pending
+ * connections may grow to.
+ *
+ * @return Zero on success.
+ */
+PJ_DECL(pj_status_t) pj_sock_listen( pj_sock_t sockfd,
+ int backlog );
+
+/**
+ * Accept new connection on the specified connection oriented server socket.
+ *
+ * @param serverfd The server socket.
+ * @param newsock New socket on success, of PJ_INVALID_SOCKET if failed.
+ * @param addr A pointer to sockaddr type. If the argument is not NULL,
+ * it will be filled by the address of connecting entity.
+ * @param addrlen Initially specifies the length of the address, and upon
+ * return will be filled with the exact address length.
+ *
+ * @return Zero on success, or the error number.
+ */
+PJ_DECL(pj_status_t) pj_sock_accept( pj_sock_t serverfd,
+ pj_sock_t *newsock,
+ pj_sockaddr_t *addr,
+ int *addrlen);
+#endif
+
+/**
+ * The file descriptor sockfd must refer to a socket. If the socket is of
+ * type PJ_SOCK_DGRAM then the serv_addr address is the address to which
+ * datagrams are sent by default, and the only address from which datagrams
+ * are received. If the socket is of type PJ_SOCK_STREAM or PJ_SOCK_SEQPACKET,
+ * this call attempts to make a connection to another socket. The
+ * other socket is specified by serv_addr, which is an address (of length
+ * addrlen) in the communications space of the socket. Each communications
+ * space interprets the serv_addr parameter in its own way.
+ *
+ * @param sockfd The socket descriptor.
+ * @param serv_addr Server address to connect to.
+ * @param addrlen The length of server address.
+ *
+ * @return Zero on success.
+ */
+PJ_DECL(pj_status_t) pj_sock_connect( pj_sock_t sockfd,
+ const pj_sockaddr_t *serv_addr,
+ int addrlen);
+
+/**
+ * Return the address of peer which is connected to socket sockfd.
+ *
+ * @param sockfd The socket descriptor.
+ * @param addr Pointer to sockaddr structure to which the address
+ * will be returned.
+ * @param namelen Initially the length of the addr. Upon return the value
+ * will be set to the actual length of the address.
+ *
+ * @return Zero on success.
+ */
+PJ_DECL(pj_status_t) pj_sock_getpeername(pj_sock_t sockfd,
+ pj_sockaddr_t *addr,
+ int *namelen);
+
+/**
+ * Return the current name of the specified socket.
+ *
+ * @param sockfd The socket descriptor.
+ * @param addr Pointer to sockaddr structure to which the address
+ * will be returned.
+ * @param namelen Initially the length of the addr. Upon return the value
+ * will be set to the actual length of the address.
+ *
+ * @return Zero on success.
+ */
+PJ_DECL(pj_status_t) pj_sock_getsockname( pj_sock_t sockfd,
+ pj_sockaddr_t *addr,
+ int *namelen);
+
+/**
+ * Get socket option associated with a socket. Options may exist at multiple
+ * protocol levels; they are always present at the uppermost socket level.
+ *
+ * @param sockfd The socket descriptor.
+ * @param level The level which to get the option from.
+ * @param optname The option name.
+ * @param optval Identifies the buffer which the value will be
+ * returned.
+ * @param optlen Initially contains the length of the buffer, upon
+ * return will be set to the actual size of the value.
+ *
+ * @return Zero on success.
+ */
+PJ_DECL(pj_status_t) pj_sock_getsockopt( pj_sock_t sockfd,
+ pj_uint16_t level,
+ pj_uint16_t optname,
+ void *optval,
+ int *optlen);
+/**
+ * Manipulate the options associated with a socket. Options may exist at
+ * multiple protocol levels; they are always present at the uppermost socket
+ * level.
+ *
+ * @param sockfd The socket descriptor.
+ * @param level The level which to get the option from.
+ * @param optname The option name.
+ * @param optval Identifies the buffer which contain the value.
+ * @param optlen The length of the value.
+ *
+ * @return PJ_SUCCESS or the status code.
+ */
+PJ_DECL(pj_status_t) pj_sock_setsockopt( pj_sock_t sockfd,
+ pj_uint16_t level,
+ pj_uint16_t optname,
+ const void *optval,
+ int optlen);
+
+
+/**
+ * Receives data stream or message coming to the specified socket.
+ *
+ * @param sockfd The socket descriptor.
+ * @param buf The buffer to receive the data or message.
+ * @param len On input, the length of the buffer. On return,
+ * contains the length of data received.
+ * @param flags Combination of #pj_sock_msg_flag.
+ *
+ * @return PJ_SUCCESS or the error code.
+ */
+PJ_DECL(pj_status_t) pj_sock_recv(pj_sock_t sockfd,
+ void *buf,
+ pj_ssize_t *len,
+ unsigned flags);
+
+/**
+ * Receives data stream or message coming to the specified socket.
+ *
+ * @param sockfd The socket descriptor.
+ * @param buf The buffer to receive the data or message.
+ * @param len On input, the length of the buffer. On return,
+ * contains the length of data received.
+ * @param flags Bitmask combination of #pj_sock_msg_flag.
+ * @param from If not NULL, it will be filled with the source
+ * address of the connection.
+ * @param fromlen Initially contains the length of from address,
+ * and upon return will be filled with the actual
+ * length of the address.
+ *
+ * @return PJ_SUCCESS or the error code.
+ */
+PJ_DECL(pj_status_t) pj_sock_recvfrom( pj_sock_t sockfd,
+ void *buf,
+ pj_ssize_t *len,
+ unsigned flags,
+ pj_sockaddr_t *from,
+ int *fromlen);
+
+/**
+ * Transmit data to the socket.
+ *
+ * @param sockfd Socket descriptor.
+ * @param buf Buffer containing data to be sent.
+ * @param len On input, the length of the data in the buffer.
+ * Upon return, it will be filled with the length
+ * of data sent.
+ * @param flags Bitmask combination of #pj_sock_msg_flag.
+ *
+ * @return PJ_SUCCESS or the status code.
+ */
+PJ_DECL(pj_status_t) pj_sock_send(pj_sock_t sockfd,
+ const void *buf,
+ pj_ssize_t *len,
+ unsigned flags);
+
+/**
+ * Transmit data to the socket to the specified address.
+ *
+ * @param sockfd Socket descriptor.
+ * @param buf Buffer containing data to be sent.
+ * @param len On input, the length of the data in the buffer.
+ * Upon return, it will be filled with the length
+ * of data sent.
+ * @param flags Bitmask combination of #pj_sock_msg_flag.
+ * @param to The address to send.
+ * @param tolen The length of the address in bytes.
+ *
+ * @return The length of data successfully sent.
+ */
+PJ_DECL(pj_status_t) pj_sock_sendto(pj_sock_t sockfd,
+ const void *buf,
+ pj_ssize_t *len,
+ unsigned flags,
+ const pj_sockaddr_t *to,
+ int tolen);
+
+#if PJ_HAS_TCP
+/**
+ * The shutdown call causes all or part of a full-duplex connection on the
+ * socket associated with sockfd to be shut down.
+ *
+ * @param sockfd The socket descriptor.
+ * @param how If how is PJ_SHUT_RD, further receptions will be
+ * disallowed. If how is PJ_SHUT_WR, further transmissions
+ * will be disallowed. If how is PJ_SHUT_RDWR, further
+ * receptions andtransmissions will be disallowed.
+ *
+ * @return Zero on success.
+ */
+PJ_DECL(pj_status_t) pj_sock_shutdown( pj_sock_t sockfd,
+ int how);
+#endif
+
+/**
+ * @}
+ */
+
+
+PJ_END_DECL
+
+#endif /* __PJ_SOCK_H__ */
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-25 07:16:05 +0000