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 /*
  * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
  * All rights reserved. 
  * 
  * Redistribution and use in source and binary forms, with or without modification, 
  * are permitted provided that the following conditions are met:
  *
  * 1. Redistributions of source code must retain the above copyright notice,
  *    this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright notice,
  *    this list of conditions and the following disclaimer in the documentation
  *    and/or other materials provided with the distribution.
  * 3. The name of the author may not be used to endorse or promote products
  *    derived from this software without specific prior written permission. 
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
  * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
  * OF SUCH DAMAGE.
  *
  * This file is part of the lwIP TCP/IP stack.
  * 
  * Author: Adam Dunkels <adam@sics.se>
  *
  */
 
 
 #ifndef __LWIP_SOCKETS_H__
 #define __LWIP_SOCKETS_H__
 
 #include "lwip/opt.h"
 
 #if LWIP_SOCKET /* don't build if not configured for use in lwipopts.h */
 
 #include <stddef.h>
 
 #include "lwip/ip_addr.h"
 #include "lwip/inet.h"
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 /* members are in network byte order */
 struct sockaddr_in {
   u8_t sin_len;
   u8_t sin_family;
   u16_t sin_port;
   struct in_addr sin_addr;
   char sin_zero[8];
 };
 
 struct sockaddr {
   u8_t sa_len;
   u8_t sa_family;
   char sa_data[14];
 };
 
 #ifndef socklen_t
 #  define socklen_t u32_t
 #endif
 
 /* Socket protocol types (TCP/UDP/RAW) */
 #define SOCK_STREAM     1
 #define SOCK_DGRAM      2
 #define SOCK_RAW        3
 
 /*
  * Option flags per-socket. These must match the SOF_ flags in ip.h!
  */
 #define  SO_DEBUG       0x0001 /* Unimplemented: turn on debugging info recording */
 #define  SO_ACCEPTCONN  0x0002 /* socket has had listen() */
 #define  SO_REUSEADDR   0x0004 /* Unimplemented: allow local address reuse */
 #define  SO_KEEPALIVE   0x0008 /* keep connections alive */
 #define  SO_DONTROUTE   0x0010 /* Unimplemented: just use interface addresses */
 #define  SO_BROADCAST   0x0020 /* permit to send and to receive broadcast messages (see IP_SOF_BROADCAST option) */
 #define  SO_USELOOPBACK 0x0040 /* Unimplemented: bypass hardware when possible */
 #define  SO_LINGER      0x0080 /* linger on close if data present */
 #define  SO_OOBINLINE   0x0100 /* Unimplemented: leave received OOB data in line */
 #define  SO_REUSEPORT   0x0200 /* Unimplemented: allow local address & port reuse */
 
 #define SO_DONTLINGER   ((int)(~SO_LINGER))
 
 /*
  * Additional options, not kept in so_options.
  */
 #define SO_SNDBUF    0x1001    /* Unimplemented: send buffer size */
 #define SO_RCVBUF    0x1002    /* receive buffer size */
 #define SO_SNDLOWAT  0x1003    /* Unimplemented: send low-water mark */
 #define SO_RCVLOWAT  0x1004    /* Unimplemented: receive low-water mark */
 #define SO_SNDTIMEO  0x1005    /* Unimplemented: send timeout */
 #define SO_RCVTIMEO  0x1006    /* receive timeout */
 #define SO_ERROR     0x1007    /* get error status and clear */
 #define SO_TYPE      0x1008    /* get socket type */
 #define SO_CONTIMEO  0x1009    /* Unimplemented: connect timeout */
 #define SO_NO_CHECK  0x100a    /* don't create UDP checksum */
 
 
 /*
  * Structure used for manipulating linger option.
  */
 struct linger {
        int l_onoff;                /* option on/off */
        int l_linger;               /* linger time */
 };
 
 /*
  * Level number for (get/set)sockopt() to apply to socket itself.
  */
 #define  SOL_SOCKET  0xfff    /* options for socket level */
 
 
 #define AF_UNSPEC       0
 #define AF_INET         2
 #define PF_INET         AF_INET
 #define PF_UNSPEC       AF_UNSPEC
 
 #define IPPROTO_IP      0
 #define IPPROTO_TCP     6
 #define IPPROTO_UDP     17
 #define IPPROTO_UDPLITE 136
 
 /* Flags we can use with send and recv. */
 #define MSG_PEEK       0x01    /* Peeks at an incoming message */
 #define MSG_WAITALL    0x02    /* Unimplemented: Requests that the function block until the full amount of data requested can be returned */
 #define MSG_OOB        0x04    /* Unimplemented: Requests out-of-band data. The significance and semantics of out-of-band data are protocol-specific */
 #define MSG_DONTWAIT   0x08    /* Nonblocking i/o for this operation only */
 #define MSG_MORE       0x10    /* Sender will send more */
 
 
 /*
  * Options for level IPPROTO_IP
  */
 #define IP_TOS             1
 #define IP_TTL             2
 
 #if LWIP_TCP
 /*
  * Options for level IPPROTO_TCP
  */
 #define TCP_NODELAY    0x01    /* don't delay send to coalesce packets */
 #define TCP_KEEPALIVE  0x02    /* send KEEPALIVE probes when idle for pcb->keep_idle milliseconds */
 #define TCP_KEEPIDLE   0x03    /* set pcb->keep_idle  - Same as TCP_KEEPALIVE, but use seconds for get/setsockopt */
 #define TCP_KEEPINTVL  0x04    /* set pcb->keep_intvl - Use seconds for get/setsockopt */
 #define TCP_KEEPCNT    0x05    /* set pcb->keep_cnt   - Use number of probes sent for get/setsockopt */
 #endif /* LWIP_TCP */
 
 #if LWIP_UDP && LWIP_UDPLITE
 /*
  * Options for level IPPROTO_UDPLITE
  */
 #define UDPLITE_SEND_CSCOV 0x01 /* sender checksum coverage */
 #define UDPLITE_RECV_CSCOV 0x02 /* minimal receiver checksum coverage */
 #endif /* LWIP_UDP && LWIP_UDPLITE*/
 
 
 #if LWIP_IGMP
 /*
  * Options and types for UDP multicast traffic handling
  */
 #define IP_ADD_MEMBERSHIP  3
 #define IP_DROP_MEMBERSHIP 4
 #define IP_MULTICAST_TTL   5
 #define IP_MULTICAST_IF    6
 #define IP_MULTICAST_LOOP  7
 
 typedef struct ip_mreq {
     struct in_addr imr_multiaddr; /* IP multicast address of group */
     struct in_addr imr_interface; /* local IP address of interface */
 } ip_mreq;
 #endif /* LWIP_IGMP */
 
 /*
  * The Type of Service provides an indication of the abstract
  * parameters of the quality of service desired.  These parameters are
  * to be used to guide the selection of the actual service parameters
  * when transmitting a datagram through a particular network.  Several
  * networks offer service precedence, which somehow treats high
  * precedence traffic as more important than other traffic (generally
  * by accepting only traffic above a certain precedence at time of high
  * load).  The major choice is a three way tradeoff between low-delay,
  * high-reliability, and high-throughput.
  * The use of the Delay, Throughput, and Reliability indications may
  * increase the cost (in some sense) of the service.  In many networks
  * better performance for one of these parameters is coupled with worse
  * performance on another.  Except for very unusual cases at most two
  * of these three indications should be set.
  */
 #define IPTOS_TOS_MASK          0x1E
 #define IPTOS_TOS(tos)          ((tos) & IPTOS_TOS_MASK)
 #define IPTOS_LOWDELAY          0x10
 #define IPTOS_THROUGHPUT        0x08
 #define IPTOS_RELIABILITY       0x04
 #define IPTOS_LOWCOST           0x02
 #define IPTOS_MINCOST           IPTOS_LOWCOST
 
 /*
  * The Network Control precedence designation is intended to be used
  * within a network only.  The actual use and control of that
  * designation is up to each network. The Internetwork Control
  * designation is intended for use by gateway control originators only.
  * If the actual use of these precedence designations is of concern to
  * a particular network, it is the responsibility of that network to
  * control the access to, and use of, those precedence designations.
  */
 #define IPTOS_PREC_MASK                 0xe0
 #define IPTOS_PREC(tos)                ((tos) & IPTOS_PREC_MASK)
 #define IPTOS_PREC_NETCONTROL           0xe0
 #define IPTOS_PREC_INTERNETCONTROL      0xc0
 #define IPTOS_PREC_CRITIC_ECP           0xa0
 #define IPTOS_PREC_FLASHOVERRIDE        0x80
 #define IPTOS_PREC_FLASH                0x60
 #define IPTOS_PREC_IMMEDIATE            0x40
 #define IPTOS_PREC_PRIORITY             0x20
 #define IPTOS_PREC_ROUTINE              0x00
 
 
 /*
  * Commands for ioctlsocket(),  taken from the BSD file fcntl.h.
  * lwip_ioctl only supports FIONREAD and FIONBIO, for now
  *
  * Ioctl's have the command encoded in the lower word,
  * and the size of any in or out parameters in the upper
  * word.  The high 2 bits of the upper word are used
  * to encode the in/out status of the parameter; for now
  * we restrict parameters to at most 128 bytes.
  */
 #if !defined(FIONREAD) || !defined(FIONBIO)
 #define IOCPARM_MASK    0x7fU           /* parameters must be < 128 bytes */
 #define IOC_VOID        0x20000000UL    /* no parameters */
 #define IOC_OUT         0x40000000UL    /* copy out parameters */
 #define IOC_IN          0x80000000UL    /* copy in parameters */
 #define IOC_INOUT       (IOC_IN|IOC_OUT)
                                         /* 0x20000000 distinguishes new &
                                            old ioctl's */
 #define _IO(x,y)        (IOC_VOID|((x)<<8)|(y))
 
 #define _IOR(x,y,t)     (IOC_OUT|(((long)sizeof(t)&IOCPARM_MASK)<<16)|((x)<<8)|(y))
 
 #define _IOW(x,y,t)     (IOC_IN|(((long)sizeof(t)&IOCPARM_MASK)<<16)|((x)<<8)|(y))
 #endif /* !defined(FIONREAD) || !defined(FIONBIO) */
 
 #ifndef FIONREAD
 #define FIONREAD    _IOR('f', 127, unsigned long) /* get # bytes to read */
 #endif
 #ifndef FIONBIO
 #define FIONBIO     _IOW('f', 126, unsigned long) /* set/clear non-blocking i/o */
 #endif
 
 /* Socket I/O Controls: unimplemented */
 #ifndef SIOCSHIWAT
 #define SIOCSHIWAT  _IOW('s',  0, unsigned long)  /* set high watermark */
 #define SIOCGHIWAT  _IOR('s',  1, unsigned long)  /* get high watermark */
 #define SIOCSLOWAT  _IOW('s',  2, unsigned long)  /* set low watermark */
 #define SIOCGLOWAT  _IOR('s',  3, unsigned long)  /* get low watermark */
 #define SIOCATMARK  _IOR('s',  7, unsigned long)  /* at oob mark? */
 #endif
 
 /* Socket flags: */
 #ifndef O_NONBLOCK
 #define O_NONBLOCK    04000U
 #endif
 
 /* FD_SET used for lwip_select */
 #ifndef FD_SET
   #undef  FD_SETSIZE
   /* Make FD_SETSIZE match NUM_SOCKETS in socket.c */
   #define FD_SETSIZE    MEMP_NUM_NETCONN
   #define FD_SET(n, p)  ((p)->fd_bits[(n)/8] |=  (1 << ((n) & 7)))
   #define FD_CLR(n, p)  ((p)->fd_bits[(n)/8] &= ~(1 << ((n) & 7)))
   #define FD_ISSET(n,p) ((p)->fd_bits[(n)/8] &   (1 << ((n) & 7)))
   #define FD_ZERO(p)    memset((void*)(p),0,sizeof(*(p)))
 
   typedef struct fd_set {
           unsigned char fd_bits [(FD_SETSIZE+7)/8];
         } fd_set;
 
 #endif /* FD_SET */
 
 /** LWIP_TIMEVAL_PRIVATE: if you want to use the struct timeval provided
  * by your system, set this to 0 and include <sys/time.h> in cc.h */ 
 #ifndef LWIP_TIMEVAL_PRIVATE
 #define LWIP_TIMEVAL_PRIVATE 1
 #endif
 
 #if LWIP_TIMEVAL_PRIVATE
 struct timeval {
   long    tv_sec;         /* seconds */
   long    tv_usec;        /* and microseconds */
 };
 #endif /* LWIP_TIMEVAL_PRIVATE */
 
 void lwip_socket_init(void);
 
 int lwip_accept(int s, struct sockaddr *addr, socklen_t *addrlen);
 int lwip_bind(int s, const struct sockaddr *name, socklen_t namelen);
 int lwip_shutdown(int s, int how);
 int lwip_getpeername (int s, struct sockaddr *name, socklen_t *namelen);
 int lwip_getsockname (int s, struct sockaddr *name, socklen_t *namelen);
 int lwip_getsockopt (int s, int level, int optname, void *optval, socklen_t *optlen);
 int lwip_setsockopt (int s, int level, int optname, const void *optval, socklen_t optlen);
 int lwip_close(int s);
 int lwip_connect(int s, const struct sockaddr *name, socklen_t namelen);
 int lwip_listen(int s, int backlog);
 int lwip_recv(int s, void *mem, size_t len, int flags);
 int lwip_read(int s, void *mem, size_t len);
 int lwip_recvfrom(int s, void *mem, size_t len, int flags,
       struct sockaddr *from, socklen_t *fromlen);
 int lwip_send(int s, const void *dataptr, size_t size, int flags);
 int lwip_sendto(int s, const void *dataptr, size_t size, int flags,
     const struct sockaddr *to, socklen_t tolen);
 int lwip_socket(int domain, int type, int protocol);
 int lwip_write(int s, const void *dataptr, size_t size);
 int lwip_select(int maxfdp1, fd_set *readset, fd_set *writeset, fd_set *exceptset,
                 struct timeval *timeout);
 int lwip_ioctl(int s, long cmd, void *argp);
 
 #if LWIP_COMPAT_SOCKETS
 #define accept(a,b,c)         lwip_accept(a,b,c)
 #define bind(a,b,c)           lwip_bind(a,b,c)
 #define shutdown(a,b)         lwip_shutdown(a,b)
 #define closesocket(s)        lwip_close(s)
 #define connect(a,b,c)        lwip_connect(a,b,c)
 #define getsockname(a,b,c)    lwip_getsockname(a,b,c)
 #define getpeername(a,b,c)    lwip_getpeername(a,b,c)
 #define setsockopt(a,b,c,d,e) lwip_setsockopt(a,b,c,d,e)
 #define getsockopt(a,b,c,d,e) lwip_getsockopt(a,b,c,d,e)
 #define listen(a,b)           lwip_listen(a,b)
 #define recv(a,b,c,d)         lwip_recv(a,b,c,d)
 #define recvfrom(a,b,c,d,e,f) lwip_recvfrom(a,b,c,d,e,f)
 #define send(a,b,c,d)         lwip_send(a,b,c,d)
 #define sendto(a,b,c,d,e,f)   lwip_sendto(a,b,c,d,e,f)
 #define socket(a,b,c)         lwip_socket(a,b,c)
 #define select(a,b,c,d,e)     lwip_select(a,b,c,d,e)
 #define ioctlsocket(a,b,c)    lwip_ioctl(a,b,c)
 
 #if LWIP_POSIX_SOCKETS_IO_NAMES
 #define read(a,b,c)           lwip_read(a,b,c)
 #define write(a,b,c)          lwip_write(a,b,c)
 #define close(s)              lwip_close(s)
 #endif /* LWIP_POSIX_SOCKETS_IO_NAMES */
 
 #endif /* LWIP_COMPAT_SOCKETS */
 
 #ifdef __cplusplus
 }
 #endif
 
 #endif /* LWIP_SOCKET */
 
 #endif /* __LWIP_SOCKETS_H__ */