* #27232: jni: added pjproject checkout as regular git content
We will remove it once the next release of pjsip (with Android support)
comes out and is merged into SFLphone.
diff --git a/jni/pjproject-android/.svn/pristine/65/65565c2396b1d24d777dc6e901af66cd588acd2b.svn-base b/jni/pjproject-android/.svn/pristine/65/65565c2396b1d24d777dc6e901af66cd588acd2b.svn-base
new file mode 100644
index 0000000..b7d1cb0
--- /dev/null
+++ b/jni/pjproject-android/.svn/pristine/65/65565c2396b1d24d777dc6e901af66cd588acd2b.svn-base
@@ -0,0 +1,1432 @@
+/* $Id$ */
+/*
+ * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
+ * Copyright (C) 2003-2008 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.
+ */
+
+/** Address family is unspecified. @see pj_AF_UNSPEC() */
+extern const pj_uint16_t PJ_AF_UNSPEC;
+
+/** Unix domain socket. @see pj_AF_UNIX() */
+extern const pj_uint16_t PJ_AF_UNIX;
+
+/** POSIX name for AF_UNIX */
+#define PJ_AF_LOCAL PJ_AF_UNIX;
+
+/** Internet IP protocol. @see pj_AF_INET() */
+extern const pj_uint16_t PJ_AF_INET;
+
+/** IP version 6. @see pj_AF_INET6() */
+extern const pj_uint16_t PJ_AF_INET6;
+
+/** Packet family. @see pj_AF_PACKET() */
+extern const pj_uint16_t PJ_AF_PACKET;
+
+/** IRDA sockets. @see pj_AF_IRDA() */
+extern const pj_uint16_t PJ_AF_IRDA;
+
+/*
+ * Accessor functions for various address family constants. These
+ * functions are provided because Symbian doesn't allow exporting
+ * global variables from a DLL.
+ */
+
+#if defined(PJ_DLL)
+ /** Get #PJ_AF_UNSPEC value */
+ PJ_DECL(pj_uint16_t) pj_AF_UNSPEC(void);
+ /** Get #PJ_AF_UNIX value. */
+ PJ_DECL(pj_uint16_t) pj_AF_UNIX(void);
+ /** Get #PJ_AF_INET value. */
+ PJ_DECL(pj_uint16_t) pj_AF_INET(void);
+ /** Get #PJ_AF_INET6 value. */
+ PJ_DECL(pj_uint16_t) pj_AF_INET6(void);
+ /** Get #PJ_AF_PACKET value. */
+ PJ_DECL(pj_uint16_t) pj_AF_PACKET(void);
+ /** Get #PJ_AF_IRDA value. */
+ PJ_DECL(pj_uint16_t) pj_AF_IRDA(void);
+#else
+ /* When pjlib is not built as DLL, these accessor functions are
+ * simply a macro to get their constants
+ */
+ /** Get #PJ_AF_UNSPEC value */
+# define pj_AF_UNSPEC() PJ_AF_UNSPEC
+ /** Get #PJ_AF_UNIX value. */
+# define pj_AF_UNIX() PJ_AF_UNIX
+ /** Get #PJ_AF_INET value. */
+# define pj_AF_INET() PJ_AF_INET
+ /** Get #PJ_AF_INET6 value. */
+# define pj_AF_INET6() PJ_AF_INET6
+ /** Get #PJ_AF_PACKET value. */
+# define pj_AF_PACKET() PJ_AF_PACKET
+ /** Get #PJ_AF_IRDA value. */
+# define pj_AF_IRDA() PJ_AF_IRDA
+#endif
+
+
+/**
+ * Supported types of sockets.
+ * APPLICATION MUST USE THESE VALUES INSTEAD OF NORMAL SOCK_*, BECAUSE
+ * THE LIBRARY WILL TRANSLATE THE VALUE TO THE NATIVE VALUE.
+ */
+
+/** Sequenced, reliable, connection-based byte streams.
+ * @see pj_SOCK_STREAM() */
+extern const pj_uint16_t PJ_SOCK_STREAM;
+
+/** Connectionless, unreliable datagrams of fixed maximum lengths.
+ * @see pj_SOCK_DGRAM() */
+extern const pj_uint16_t PJ_SOCK_DGRAM;
+
+/** Raw protocol interface. @see pj_SOCK_RAW() */
+extern const pj_uint16_t PJ_SOCK_RAW;
+
+/** Reliably-delivered messages. @see pj_SOCK_RDM() */
+extern const pj_uint16_t PJ_SOCK_RDM;
+
+
+/*
+ * Accessor functions for various constants. These functions are provided
+ * because Symbian doesn't allow exporting global variables from a DLL.
+ */
+
+#if defined(PJ_DLL)
+ /** Get #PJ_SOCK_STREAM constant */
+ PJ_DECL(int) pj_SOCK_STREAM(void);
+ /** Get #PJ_SOCK_DGRAM constant */
+ PJ_DECL(int) pj_SOCK_DGRAM(void);
+ /** Get #PJ_SOCK_RAW constant */
+ PJ_DECL(int) pj_SOCK_RAW(void);
+ /** Get #PJ_SOCK_RDM constant */
+ PJ_DECL(int) pj_SOCK_RDM(void);
+#else
+ /** Get #PJ_SOCK_STREAM constant */
+# define pj_SOCK_STREAM() PJ_SOCK_STREAM
+ /** Get #PJ_SOCK_DGRAM constant */
+# define pj_SOCK_DGRAM() PJ_SOCK_DGRAM
+ /** Get #PJ_SOCK_RAW constant */
+# define pj_SOCK_RAW() PJ_SOCK_RAW
+ /** Get #PJ_SOCK_RDM constant */
+# define pj_SOCK_RDM() PJ_SOCK_RDM
+#endif
+
+
+/**
+ * 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.
+ */
+/** Socket level. @see pj_SOL_SOCKET() */
+extern const pj_uint16_t PJ_SOL_SOCKET;
+/** IP level. @see pj_SOL_IP() */
+extern const pj_uint16_t PJ_SOL_IP;
+/** TCP level. @see pj_SOL_TCP() */
+extern const pj_uint16_t PJ_SOL_TCP;
+/** UDP level. @see pj_SOL_UDP() */
+extern const pj_uint16_t PJ_SOL_UDP;
+/** IP version 6. @see pj_SOL_IPV6() */
+extern const pj_uint16_t PJ_SOL_IPV6;
+
+/*
+ * Accessor functions for various constants. These functions are provided
+ * because Symbian doesn't allow exporting global variables from a DLL.
+ */
+
+#if defined(PJ_DLL)
+ /** Get #PJ_SOL_SOCKET constant */
+ PJ_DECL(pj_uint16_t) pj_SOL_SOCKET(void);
+ /** Get #PJ_SOL_IP constant */
+ PJ_DECL(pj_uint16_t) pj_SOL_IP(void);
+ /** Get #PJ_SOL_TCP constant */
+ PJ_DECL(pj_uint16_t) pj_SOL_TCP(void);
+ /** Get #PJ_SOL_UDP constant */
+ PJ_DECL(pj_uint16_t) pj_SOL_UDP(void);
+ /** Get #PJ_SOL_IPV6 constant */
+ PJ_DECL(pj_uint16_t) pj_SOL_IPV6(void);
+#else
+ /** Get #PJ_SOL_SOCKET constant */
+# define pj_SOL_SOCKET() PJ_SOL_SOCKET
+ /** Get #PJ_SOL_IP constant */
+# define pj_SOL_IP() PJ_SOL_IP
+ /** Get #PJ_SOL_TCP constant */
+# define pj_SOL_TCP() PJ_SOL_TCP
+ /** Get #PJ_SOL_UDP constant */
+# define pj_SOL_UDP() PJ_SOL_UDP
+ /** Get #PJ_SOL_IPV6 constant */
+# define pj_SOL_IPV6() PJ_SOL_IPV6
+#endif
+
+
+/* IP_TOS
+ *
+ * Note:
+ * TOS CURRENTLY DOES NOT WORK IN Windows 2000 and above!
+ * See http://support.microsoft.com/kb/248611
+ */
+/** IP_TOS optname in setsockopt(). @see pj_IP_TOS() */
+extern const pj_uint16_t PJ_IP_TOS;
+
+/*
+ * IP TOS related constats.
+ *
+ * Note:
+ * TOS CURRENTLY DOES NOT WORK IN Windows 2000 and above!
+ * See http://support.microsoft.com/kb/248611
+ */
+/** Minimize delays. @see pj_IPTOS_LOWDELAY() */
+extern const pj_uint16_t PJ_IPTOS_LOWDELAY;
+
+/** Optimize throughput. @see pj_IPTOS_THROUGHPUT() */
+extern const pj_uint16_t PJ_IPTOS_THROUGHPUT;
+
+/** Optimize for reliability. @see pj_IPTOS_RELIABILITY() */
+extern const pj_uint16_t PJ_IPTOS_RELIABILITY;
+
+/** "filler data" where slow transmission does't matter.
+ * @see pj_IPTOS_MINCOST() */
+extern const pj_uint16_t PJ_IPTOS_MINCOST;
+
+
+#if defined(PJ_DLL)
+ /** Get #PJ_IP_TOS constant */
+ PJ_DECL(int) pj_IP_TOS(void);
+
+ /** Get #PJ_IPTOS_LOWDELAY constant */
+ PJ_DECL(int) pj_IPTOS_LOWDELAY(void);
+
+ /** Get #PJ_IPTOS_THROUGHPUT constant */
+ PJ_DECL(int) pj_IPTOS_THROUGHPUT(void);
+
+ /** Get #PJ_IPTOS_RELIABILITY constant */
+ PJ_DECL(int) pj_IPTOS_RELIABILITY(void);
+
+ /** Get #PJ_IPTOS_MINCOST constant */
+ PJ_DECL(int) pj_IPTOS_MINCOST(void);
+#else
+ /** Get #PJ_IP_TOS constant */
+# define pj_IP_TOS() PJ_IP_TOS
+
+ /** Get #PJ_IPTOS_LOWDELAY constant */
+# define pj_IPTOS_LOWDELAY() PJ_IP_TOS_LOWDELAY
+
+ /** Get #PJ_IPTOS_THROUGHPUT constant */
+# define pj_IPTOS_THROUGHPUT() PJ_IP_TOS_THROUGHPUT
+
+ /** Get #PJ_IPTOS_RELIABILITY constant */
+# define pj_IPTOS_RELIABILITY() PJ_IP_TOS_RELIABILITY
+
+ /** Get #PJ_IPTOS_MINCOST constant */
+# define pj_IPTOS_MINCOST() PJ_IP_TOS_MINCOST
+#endif
+
+
+/**
+ * Values to be specified as \c optname when calling #pj_sock_setsockopt()
+ * or #pj_sock_getsockopt().
+ */
+
+/** Socket type. @see pj_SO_TYPE() */
+extern const pj_uint16_t PJ_SO_TYPE;
+
+/** Buffer size for receive. @see pj_SO_RCVBUF() */
+extern const pj_uint16_t PJ_SO_RCVBUF;
+
+/** Buffer size for send. @see pj_SO_SNDBUF() */
+extern const pj_uint16_t PJ_SO_SNDBUF;
+
+/** Disables the Nagle algorithm for send coalescing. @see pj_TCP_NODELAY */
+extern const pj_uint16_t PJ_TCP_NODELAY;
+
+/** Allows the socket to be bound to an address that is already in use.
+ * @see pj_SO_REUSEADDR */
+extern const pj_uint16_t PJ_SO_REUSEADDR;
+
+/** Do not generate SIGPIPE. @see pj_SO_NOSIGPIPE */
+extern const pj_uint16_t PJ_SO_NOSIGPIPE;
+
+/** Set the protocol-defined priority for all packets to be sent on socket.
+ */
+extern const pj_uint16_t PJ_SO_PRIORITY;
+
+/** IP multicast interface. @see pj_IP_MULTICAST_IF() */
+extern const pj_uint16_t PJ_IP_MULTICAST_IF;
+
+/** IP multicast ttl. @see pj_IP_MULTICAST_TTL() */
+extern const pj_uint16_t PJ_IP_MULTICAST_TTL;
+
+/** IP multicast loopback. @see pj_IP_MULTICAST_LOOP() */
+extern const pj_uint16_t PJ_IP_MULTICAST_LOOP;
+
+/** Add an IP group membership. @see pj_IP_ADD_MEMBERSHIP() */
+extern const pj_uint16_t PJ_IP_ADD_MEMBERSHIP;
+
+/** Drop an IP group membership. @see pj_IP_DROP_MEMBERSHIP() */
+extern const pj_uint16_t PJ_IP_DROP_MEMBERSHIP;
+
+
+#if defined(PJ_DLL)
+ /** Get #PJ_SO_TYPE constant */
+ PJ_DECL(pj_uint16_t) pj_SO_TYPE(void);
+
+ /** Get #PJ_SO_RCVBUF constant */
+ PJ_DECL(pj_uint16_t) pj_SO_RCVBUF(void);
+
+ /** Get #PJ_SO_SNDBUF constant */
+ PJ_DECL(pj_uint16_t) pj_SO_SNDBUF(void);
+
+ /** Get #PJ_TCP_NODELAY constant */
+ PJ_DECL(pj_uint16_t) pj_TCP_NODELAY(void);
+
+ /** Get #PJ_SO_REUSEADDR constant */
+ PJ_DECL(pj_uint16_t) pj_SO_REUSEADDR(void);
+
+ /** Get #PJ_SO_NOSIGPIPE constant */
+ PJ_DECL(pj_uint16_t) pj_SO_NOSIGPIPE(void);
+
+ /** Get #PJ_SO_PRIORITY constant */
+ PJ_DECL(pj_uint16_t) pj_SO_PRIORITY(void);
+
+ /** Get #PJ_IP_MULTICAST_IF constant */
+ PJ_DECL(pj_uint16_t) pj_IP_MULTICAST_IF(void);
+
+ /** Get #PJ_IP_MULTICAST_TTL constant */
+ PJ_DECL(pj_uint16_t) pj_IP_MULTICAST_TTL(void);
+
+ /** Get #PJ_IP_MULTICAST_LOOP constant */
+ PJ_DECL(pj_uint16_t) pj_IP_MULTICAST_LOOP(void);
+
+ /** Get #PJ_IP_ADD_MEMBERSHIP constant */
+ PJ_DECL(pj_uint16_t) pj_IP_ADD_MEMBERSHIP(void);
+
+ /** Get #PJ_IP_DROP_MEMBERSHIP constant */
+ PJ_DECL(pj_uint16_t) pj_IP_DROP_MEMBERSHIP(void);
+#else
+ /** Get #PJ_SO_TYPE constant */
+# define pj_SO_TYPE() PJ_SO_TYPE
+
+ /** Get #PJ_SO_RCVBUF constant */
+# define pj_SO_RCVBUF() PJ_SO_RCVBUF
+
+ /** Get #PJ_SO_SNDBUF constant */
+# define pj_SO_SNDBUF() PJ_SO_SNDBUF
+
+ /** Get #PJ_TCP_NODELAY constant */
+# define pj_TCP_NODELAY() PJ_TCP_NODELAY
+
+ /** Get #PJ_SO_REUSEADDR constant */
+# define pj_SO_REUSEADDR() PJ_SO_REUSEADDR
+
+ /** Get #PJ_SO_NOSIGPIPE constant */
+# define pj_SO_NOSIGPIPE() PJ_SO_NOSIGPIPE
+
+ /** Get #PJ_SO_PRIORITY constant */
+# define pj_SO_PRIORITY() PJ_SO_PRIORITY
+
+ /** Get #PJ_IP_MULTICAST_IF constant */
+# define pj_IP_MULTICAST_IF() PJ_IP_MULTICAST_IF
+
+ /** Get #PJ_IP_MULTICAST_TTL constant */
+# define pj_IP_MULTICAST_TTL() PJ_IP_MULTICAST_TTL
+
+ /** Get #PJ_IP_MULTICAST_LOOP constant */
+# define pj_IP_MULTICAST_LOOP() PJ_IP_MULTICAST_LOOP
+
+ /** Get #PJ_IP_ADD_MEMBERSHIP constant */
+# define pj_IP_ADD_MEMBERSHIP() PJ_IP_ADD_MEMBERSHIP
+
+ /** Get #PJ_IP_DROP_MEMBERSHIP constant */
+# define pj_IP_DROP_MEMBERSHIP() PJ_IP_DROP_MEMBERSHIP
+#endif
+
+
+/*
+ * Flags to be specified in #pj_sock_recv, #pj_sock_send, etc.
+ */
+
+/** Out-of-band messages. @see pj_MSG_OOB() */
+extern const int PJ_MSG_OOB;
+
+/** Peek, don't remove from buffer. @see pj_MSG_PEEK() */
+extern const int PJ_MSG_PEEK;
+
+/** Don't route. @see pj_MSG_DONTROUTE() */
+extern const int PJ_MSG_DONTROUTE;
+
+
+#if defined(PJ_DLL)
+ /** Get #PJ_MSG_OOB constant */
+ PJ_DECL(int) pj_MSG_OOB(void);
+
+ /** Get #PJ_MSG_PEEK constant */
+ PJ_DECL(int) pj_MSG_PEEK(void);
+
+ /** Get #PJ_MSG_DONTROUTE constant */
+ PJ_DECL(int) pj_MSG_DONTROUTE(void);
+#else
+ /** Get #PJ_MSG_OOB constant */
+# define pj_MSG_OOB() PJ_MSG_OOB
+
+ /** Get #PJ_MSG_PEEK constant */
+# define pj_MSG_PEEK() PJ_MSG_PEEK
+
+ /** Get #PJ_MSG_DONTROUTE constant */
+# define pj_MSG_DONTROUTE() PJ_MSG_DONTROUTE
+#endif
+
+
+/**
+ * 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)
+
+/* Must undefine s_addr because of pj_in_addr below */
+#undef s_addr
+
+/**
+ * This structure describes Internet address.
+ */
+typedef struct pj_in_addr
+{
+ pj_uint32_t s_addr; /**< The 32bit IP address. */
+} pj_in_addr;
+
+
+/**
+ * Maximum length of text representation of an IPv4 address.
+ */
+#define PJ_INET_ADDRSTRLEN 16
+
+/**
+ * Maximum length of text representation of an IPv6 address.
+ */
+#define PJ_INET6_ADDRSTRLEN 46
+
+/**
+ * The size of sin_zero field in pj_sockaddr_in structure. Most OSes
+ * use 8, but others such as the BSD TCP/IP stack in eCos uses 24.
+ */
+#ifndef PJ_SOCKADDR_IN_SIN_ZERO_LEN
+# define PJ_SOCKADDR_IN_SIN_ZERO_LEN 8
+#endif
+
+/**
+ * This structure describes Internet socket address.
+ * If PJ_SOCKADDR_HAS_LEN is not zero, then sin_zero_len member is added
+ * to this struct. As far the application is concerned, the value of
+ * this member will always be zero. Internally, PJLIB may modify the value
+ * before calling OS socket API, and reset the value back to zero before
+ * returning the struct to application.
+ */
+struct pj_sockaddr_in
+{
+#if defined(PJ_SOCKADDR_HAS_LEN) && PJ_SOCKADDR_HAS_LEN!=0
+ pj_uint8_t sin_zero_len; /**< Just ignore this. */
+ pj_uint8_t sin_family; /**< Address family. */
+#else
+ pj_uint16_t sin_family; /**< Address family. */
+#endif
+ pj_uint16_t sin_port; /**< Transport layer port number. */
+ pj_in_addr sin_addr; /**< IP address. */
+ char sin_zero[PJ_SOCKADDR_IN_SIN_ZERO_LEN]; /**< Padding.*/
+};
+
+
+#undef s6_addr
+
+/**
+ * This structure describes IPv6 address.
+ */
+typedef union pj_in6_addr
+{
+ /* This is the main entry */
+ pj_uint8_t s6_addr[16]; /**< 8-bit array */
+
+ /* While these are used for proper alignment */
+ pj_uint32_t u6_addr32[4];
+
+ /* Do not use this with Winsock2, as this will align pj_sockaddr_in6
+ * to 64-bit boundary and Winsock2 doesn't like it!
+ * Update 26/04/2010:
+ * This is now disabled, see http://trac.pjsip.org/repos/ticket/1058
+ */
+#if 0 && defined(PJ_HAS_INT64) && PJ_HAS_INT64!=0 && \
+ (!defined(PJ_WIN32) || PJ_WIN32==0)
+ pj_int64_t u6_addr64[2];
+#endif
+
+} 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.
+ * If PJ_SOCKADDR_HAS_LEN is not zero, then sin_zero_len member is added
+ * to this struct. As far the application is concerned, the value of
+ * this member will always be zero. Internally, PJLIB may modify the value
+ * before calling OS socket API, and reset the value back to zero before
+ * returning the struct to application.
+ */
+typedef struct pj_sockaddr_in6
+{
+#if defined(PJ_SOCKADDR_HAS_LEN) && PJ_SOCKADDR_HAS_LEN!=0
+ pj_uint8_t sin6_zero_len; /**< Just ignore this. */
+ pj_uint8_t sin6_family; /**< Address family. */
+#else
+ pj_uint16_t sin6_family; /**< Address family */
+#endif
+ 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; /**< Set of interfaces for a scope */
+} pj_sockaddr_in6;
+
+
+/**
+ * This structure describes common attributes found in transport addresses.
+ * If PJ_SOCKADDR_HAS_LEN is not zero, then sa_zero_len member is added
+ * to this struct. As far the application is concerned, the value of
+ * this member will always be zero. Internally, PJLIB may modify the value
+ * before calling OS socket API, and reset the value back to zero before
+ * returning the struct to application.
+ */
+typedef struct pj_addr_hdr
+{
+#if defined(PJ_SOCKADDR_HAS_LEN) && PJ_SOCKADDR_HAS_LEN!=0
+ pj_uint8_t sa_zero_len;
+ pj_uint8_t sa_family;
+#else
+ pj_uint16_t sa_family; /**< Common data: address family. */
+#endif
+} pj_addr_hdr;
+
+
+/**
+ * This union describes a generic socket address.
+ */
+typedef union pj_sockaddr
+{
+ pj_addr_hdr addr; /**< Generic transport address. */
+ pj_sockaddr_in ipv4; /**< IPv4 transport address. */
+ pj_sockaddr_in6 ipv6; /**< IPv6 transport address. */
+} pj_sockaddr;
+
+
+/**
+ * This structure provides multicast group information for IPv4 addresses.
+ */
+typedef struct pj_ip_mreq {
+ pj_in_addr imr_multiaddr; /**< IP multicast address of group. */
+ pj_in_addr imr_interface; /**< local IP address of interface. */
+} pj_ip_mreq;
+
+
+/*****************************************************************************
+ *
+ * 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);
+
+/**
+ * This function converts an address in its standard text presentation form
+ * into its numeric binary form. It supports both IPv4 and IPv6 address
+ * conversion.
+ *
+ * @param af Specify the family of the address. The PJ_AF_INET and
+ * PJ_AF_INET6 address families shall be supported.
+ * @param src Points to the string being passed in.
+ * @param dst Points to a buffer into which the function stores the
+ * numeric address; this shall be large enough to hold the
+ * numeric address (32 bits for PJ_AF_INET, 128 bits for
+ * PJ_AF_INET6).
+ *
+ * @return PJ_SUCCESS if conversion was successful.
+ */
+PJ_DECL(pj_status_t) pj_inet_pton(int af, const pj_str_t *src, void *dst);
+
+/**
+ * This function converts a numeric address into a text string suitable
+ * for presentation. It supports both IPv4 and IPv6 address
+ * conversion.
+ * @see pj_sockaddr_print()
+ *
+ * @param af Specify the family of the address. This can be PJ_AF_INET
+ * or PJ_AF_INET6.
+ * @param src Points to a buffer holding an IPv4 address if the af argument
+ * is PJ_AF_INET, or an IPv6 address if the af argument is
+ * PJ_AF_INET6; the address must be in network byte order.
+ * @param dst Points to a buffer where the function stores the resulting
+ * text string; it shall not be NULL.
+ * @param size Specifies the size of this buffer, which shall be large
+ * enough to hold the text string (PJ_INET_ADDRSTRLEN characters
+ * for IPv4, PJ_INET6_ADDRSTRLEN characters for IPv6).
+ *
+ * @return PJ_SUCCESS if conversion was successful.
+ */
+PJ_DECL(pj_status_t) pj_inet_ntop(int af, const void *src,
+ char *dst, int size);
+
+/**
+ * Converts numeric address into its text string representation.
+ * @see pj_sockaddr_print()
+ *
+ * @param af Specify the family of the address. This can be PJ_AF_INET
+ * or PJ_AF_INET6.
+ * @param src Points to a buffer holding an IPv4 address if the af argument
+ * is PJ_AF_INET, or an IPv6 address if the af argument is
+ * PJ_AF_INET6; the address must be in network byte order.
+ * @param dst Points to a buffer where the function stores the resulting
+ * text string; it shall not be NULL.
+ * @param size Specifies the size of this buffer, which shall be large
+ * enough to hold the text string (PJ_INET_ADDRSTRLEN characters
+ * for IPv4, PJ_INET6_ADDRSTRLEN characters for IPv6).
+ *
+ * @return The address string or NULL if failed.
+ */
+PJ_DECL(char*) pj_inet_ntop2(int af, const void *src,
+ char *dst, int size);
+
+/**
+ * Print socket address.
+ *
+ * @param addr The socket address.
+ * @param buf Text buffer.
+ * @param size Size of buffer.
+ * @param flags Bitmask combination of these value:
+ * - 1: port number is included.
+ * - 2: square bracket is included for IPv6 address.
+ *
+ * @return The address string.
+ */
+PJ_DECL(char*) pj_sockaddr_print(const pj_sockaddr_t *addr,
+ char *buf, int size,
+ unsigned flags);
+
+/**
+ * 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);
+
+/**
+ * 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_addr2(const char *cp);
+
+/**
+ * Initialize IPv4 socket address based on the address and port info.
+ * 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.
+ *
+ * @see pj_sockaddr_init()
+ *
+ * @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);
+
+/**
+ * Initialize IP socket address based on the address and port info.
+ * 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.
+ *
+ * @see pj_sockaddr_in_init()
+ *
+ * @param af Internet address family.
+ * @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_init(int af,
+ pj_sockaddr *addr,
+ const pj_str_t *cp,
+ pj_uint16_t port);
+
+/**
+ * Compare two socket addresses.
+ *
+ * @param addr1 First address.
+ * @param addr2 Second address.
+ *
+ * @return Zero on equal, -1 if addr1 is less than addr2,
+ * and +1 if addr1 is more than addr2.
+ */
+PJ_DECL(int) pj_sockaddr_cmp(const pj_sockaddr_t *addr1,
+ const pj_sockaddr_t *addr2);
+
+/**
+ * Get pointer to the address part of a socket address.
+ *
+ * @param addr Socket address.
+ *
+ * @return Pointer to address part (sin_addr or sin6_addr,
+ * depending on address family)
+ */
+PJ_DECL(void*) pj_sockaddr_get_addr(const pj_sockaddr_t *addr);
+
+/**
+ * Check that a socket address contains a non-zero address part.
+ *
+ * @param addr Socket address.
+ *
+ * @return Non-zero if address is set to non-zero.
+ */
+PJ_DECL(pj_bool_t) pj_sockaddr_has_addr(const pj_sockaddr_t *addr);
+
+/**
+ * Get the address part length of a socket address, based on its address
+ * family. For PJ_AF_INET, the length will be sizeof(pj_in_addr), and
+ * for PJ_AF_INET6, the length will be sizeof(pj_in6_addr).
+ *
+ * @param addr Socket address.
+ *
+ * @return Length in bytes.
+ */
+PJ_DECL(unsigned) pj_sockaddr_get_addr_len(const pj_sockaddr_t *addr);
+
+/**
+ * Get the socket address length, based on its address
+ * family. For PJ_AF_INET, the length will be sizeof(pj_sockaddr_in), and
+ * for PJ_AF_INET6, the length will be sizeof(pj_sockaddr_in6).
+ *
+ * @param addr Socket address.
+ *
+ * @return Length in bytes.
+ */
+PJ_DECL(unsigned) pj_sockaddr_get_len(const pj_sockaddr_t *addr);
+
+/**
+ * Copy only the address part (sin_addr/sin6_addr) of a socket address.
+ *
+ * @param dst Destination socket address.
+ * @param src Source socket address.
+ *
+ * @see @pj_sockaddr_cp()
+ */
+PJ_DECL(void) pj_sockaddr_copy_addr(pj_sockaddr *dst,
+ const pj_sockaddr *src);
+/**
+ * Copy socket address. This will copy the whole structure depending
+ * on the address family of the source socket address.
+ *
+ * @param dst Destination socket address.
+ * @param src Source socket address.
+ *
+ * @see @pj_sockaddr_copy_addr()
+ */
+PJ_DECL(void) pj_sockaddr_cp(pj_sockaddr_t *dst, const pj_sockaddr_t *src);
+
+/**
+ * Get the IP address of an IPv4 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_DECL(pj_in_addr) pj_sockaddr_in_get_addr(const pj_sockaddr_in *addr);
+
+/**
+ * Set the IP address of an IPv4 socket address.
+ *
+ * @param addr The IP socket address.
+ * @param hostaddr The host address, in host byte order.
+ */
+PJ_DECL(void) pj_sockaddr_in_set_addr(pj_sockaddr_in *addr,
+ pj_uint32_t 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.
+ *
+ * @see pj_sockaddr_set_str_addr()
+ *
+ * @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 PJ_SUCCESS 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 of an IPv4 or IPv6 socket address from string address,
+ * with resolving the host if necessary. The string address may be in a
+ * standard IPv6 or IPv6 address or may be a hostname. If hostname
+ * is specified, then the function will resolve the host into the IP
+ * address according to the address family.
+ *
+ * @param af Address family.
+ * @param addr The IP socket address to be set.
+ * @param cp The address string, which can be in a standard
+ * IP numbers (IPv4 or IPv6) or a hostname to be resolved.
+ *
+ * @return PJ_SUCCESS on success.
+ */
+PJ_DECL(pj_status_t) pj_sockaddr_set_str_addr(int af,
+ pj_sockaddr *addr,
+ const pj_str_t *cp);
+
+/**
+ * Get the port number of a socket address, in host byte order.
+ * This function can be used for both IPv4 and IPv6 socket address.
+ *
+ * @param addr Socket address.
+ *
+ * @return Port number, in host byte order.
+ */
+PJ_DECL(pj_uint16_t) pj_sockaddr_get_port(const pj_sockaddr_t *addr);
+
+/**
+ * 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_DECL(pj_uint16_t) pj_sockaddr_in_get_port(const pj_sockaddr_in *addr);
+
+/**
+ * Set the port number of an Internet socket address.
+ *
+ * @param addr The socket address.
+ * @param hostport The port number, in host byte order.
+ */
+PJ_DECL(pj_status_t) pj_sockaddr_set_port(pj_sockaddr *addr,
+ pj_uint16_t hostport);
+
+/**
+ * Set the port number of an IPv4 socket address.
+ *
+ * @see pj_sockaddr_set_port()
+ *
+ * @param addr The IP socket address.
+ * @param hostport The port number, in host byte order.
+ */
+PJ_DECL(void) pj_sockaddr_in_set_port(pj_sockaddr_in *addr,
+ pj_uint16_t hostport);
+
+/**
+ * Parse string containing IP address and optional port into socket address,
+ * possibly also with address family detection. This function supports both
+ * IPv4 and IPv6 parsing, however IPv6 parsing may only be done if IPv6 is
+ * enabled during compilation.
+ *
+ * This function supports parsing several formats. Sample IPv4 inputs and
+ * their default results::
+ * - "10.0.0.1:80": address 10.0.0.1 and port 80.
+ * - "10.0.0.1": address 10.0.0.1 and port zero.
+ * - "10.0.0.1:": address 10.0.0.1 and port zero.
+ * - "10.0.0.1:0": address 10.0.0.1 and port zero.
+ * - ":80": address 0.0.0.0 and port 80.
+ * - ":": address 0.0.0.0 and port 0.
+ * - "localhost": address 127.0.0.1 and port 0.
+ * - "localhost:": address 127.0.0.1 and port 0.
+ * - "localhost:80": address 127.0.0.1 and port 80.
+ *
+ * Sample IPv6 inputs and their default results:
+ * - "[fec0::01]:80": address fec0::01 and port 80
+ * - "[fec0::01]": address fec0::01 and port 0
+ * - "[fec0::01]:": address fec0::01 and port 0
+ * - "[fec0::01]:0": address fec0::01 and port 0
+ * - "fec0::01": address fec0::01 and port 0
+ * - "fec0::01:80": address fec0::01:80 and port 0
+ * - "::": address zero (::) and port 0
+ * - "[::]": address zero (::) and port 0
+ * - "[::]:": address zero (::) and port 0
+ * - ":::": address zero (::) and port 0
+ * - "[::]:80": address zero (::) and port 0
+ * - ":::80": address zero (::) and port 80
+ *
+ * Note: when the IPv6 socket address contains port number, the IP
+ * part of the socket address should be enclosed with square brackets,
+ * otherwise the port number will be included as part of the IP address
+ * (see "fec0::01:80" example above).
+ *
+ * @param af Optionally specify the address family to be used. If the
+ * address family is to be deducted from the input, specify
+ * pj_AF_UNSPEC() here. Other supported values are
+ * #pj_AF_INET() and #pj_AF_INET6()
+ * @param options Additional options to assist the parsing, must be zero
+ * for now.
+ * @param str The input string to be parsed.
+ * @param addr Pointer to store the result.
+ *
+ * @return PJ_SUCCESS if the parsing is successful.
+ *
+ * @see pj_sockaddr_parse2()
+ */
+PJ_DECL(pj_status_t) pj_sockaddr_parse(int af, unsigned options,
+ const pj_str_t *str,
+ pj_sockaddr *addr);
+
+/**
+ * This function is similar to #pj_sockaddr_parse(), except that it will not
+ * convert the hostpart into IP address (thus possibly resolving the hostname
+ * into a #pj_sockaddr.
+ *
+ * Unlike #pj_sockaddr_parse(), this function has a limitation that if port
+ * number is specified in an IPv6 input string, the IP part of the IPv6 socket
+ * address MUST be enclosed in square brackets, otherwise the port number will
+ * be considered as part of the IPv6 IP address.
+ *
+ * @param af Optionally specify the address family to be used. If the
+ * address family is to be deducted from the input, specify
+ * #pj_AF_UNSPEC() here. Other supported values are
+ * #pj_AF_INET() and #pj_AF_INET6()
+ * @param options Additional options to assist the parsing, must be zero
+ * for now.
+ * @param str The input string to be parsed.
+ * @param hostpart Optional pointer to store the host part of the socket
+ * address, with any brackets removed.
+ * @param port Optional pointer to store the port number. If port number
+ * is not found, this will be set to zero upon return.
+ * @param raf Optional pointer to store the detected address family of
+ * the input address.
+ *
+ * @return PJ_SUCCESS if the parsing is successful.
+ *
+ * @see pj_sockaddr_parse()
+ */
+PJ_DECL(pj_status_t) pj_sockaddr_parse2(int af, unsigned options,
+ const pj_str_t *str,
+ pj_str_t *hostpart,
+ pj_uint16_t *port,
+ int *raf);
+
+/*****************************************************************************
+ *
+ * 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);
+
+/**
+ * Bind the IP socket sockfd to the given address and a random port in the
+ * specified range.
+ *
+ * @param sockfd The socket desriptor.
+ * @param addr The local address and port to bind the socket to.
+ * @param port_range The port range, relative the to start port number
+ * specified in port field in #addr. Note that if the
+ * port is zero, this param will be ignored.
+ * @param max_try Maximum retries.
+ *
+ * @return Zero on success.
+ */
+PJ_DECL(pj_status_t) pj_sock_bind_random( pj_sock_t sockfd,
+ const pj_sockaddr_t *addr,
+ pj_uint16_t port_range,
+ pj_uint16_t max_try);
+
+#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);
+
+
+/**
+ * Helper function to set socket buffer size using #pj_sock_setsockopt()
+ * with capability to auto retry with lower buffer setting value until
+ * the highest possible value is successfully set.
+ *
+ * @param sockfd The socket descriptor.
+ * @param optname The option name, valid values are pj_SO_RCVBUF()
+ * and pj_SO_SNDBUF().
+ * @param auto_retry Option whether auto retry with lower value is
+ * enabled.
+ * @param buf_size On input, specify the prefered buffer size setting,
+ * on output, the buffer size setting applied.
+ *
+ * @return PJ_SUCCESS or the status code.
+ */
+PJ_DECL(pj_status_t) pj_sock_setsockopt_sobuf( pj_sock_t sockfd,
+ pj_uint16_t optname,
+ pj_bool_t auto_retry,
+ unsigned *buf_size);
+
+
+/**
+ * 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 Flags (such as pj_MSG_PEEK()).
+ *
+ * @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 Flags (such as pj_MSG_PEEK()).
+ * @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 Flags (such as pj_MSG_DONTROUTE()).
+ *
+ * @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 Flags (such as pj_MSG_DONTROUTE()).
+ * @param to The address to send.
+ * @param tolen The length of the address in bytes.
+ *
+ * @return PJ_SUCCESS or the status code.
+ */
+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__ */
+