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sockets.h
00001 /* 00002 * Copyright (c) 2001-2004 Swedish Institute of Computer Science. 00003 * All rights reserved. 00004 * 00005 * Redistribution and use in source and binary forms, with or without modification, 00006 * are permitted provided that the following conditions are met: 00007 * 00008 * 1. Redistributions of source code must retain the above copyright notice, 00009 * this list of conditions and the following disclaimer. 00010 * 2. Redistributions in binary form must reproduce the above copyright notice, 00011 * this list of conditions and the following disclaimer in the documentation 00012 * and/or other materials provided with the distribution. 00013 * 3. The name of the author may not be used to endorse or promote products 00014 * derived from this software without specific prior written permission. 00015 * 00016 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 00017 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 00018 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 00019 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 00020 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 00021 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 00022 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 00023 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 00024 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 00025 * OF SUCH DAMAGE. 00026 * 00027 * This file is part of the lwIP TCP/IP stack. 00028 * 00029 * Author: Adam Dunkels <adam@sics.se> 00030 * 00031 */ 00032 00033 00034 #ifndef __LWIP_SOCKETS_H__ 00035 #define __LWIP_SOCKETS_H__ 00036 00037 #include "lwip/opt.h" 00038 00039 #if LWIP_SOCKET /* don't build if not configured for use in lwipopts.h */ 00040 00041 #include "lwip/ip_addr.h" 00042 #include "lwip/inet.h" 00043 00044 #ifdef __cplusplus 00045 extern "C" { 00046 #endif 00047 00048 /* members are in network byte order */ 00049 struct sockaddr_in { 00050 u8_t sin_len; 00051 u8_t sin_family; 00052 u16_t sin_port; 00053 struct in_addr sin_addr; 00054 char sin_zero[8]; 00055 }; 00056 00057 struct sockaddr { 00058 u8_t sa_len; 00059 u8_t sa_family; 00060 char sa_data[14]; 00061 }; 00062 00063 #ifndef socklen_t 00064 # define socklen_t u32_t 00065 #endif 00066 00067 /* Socket protocol types (TCP/UDP/RAW) */ 00068 #define SOCK_STREAM 1 00069 #define SOCK_DGRAM 2 00070 #define SOCK_RAW 3 00071 00072 /* 00073 * Option flags per-socket. These must match the SOF_ flags in ip.h! 00074 */ 00075 #define SO_DEBUG 0x0001 /* Unimplemented: turn on debugging info recording */ 00076 #define SO_ACCEPTCONN 0x0002 /* socket has had listen() */ 00077 #define SO_REUSEADDR 0x0004 /* Unimplemented: allow local address reuse */ 00078 #define SO_KEEPALIVE 0x0008 /* keep connections alive */ 00079 #define SO_DONTROUTE 0x0010 /* Unimplemented: just use interface addresses */ 00080 #define SO_BROADCAST 0x0020 /* Unimplemented: permit sending of broadcast msgs */ 00081 #define SO_USELOOPBACK 0x0040 /* Unimplemented: bypass hardware when possible */ 00082 #define SO_LINGER 0x0080 /* linger on close if data present */ 00083 #define SO_OOBINLINE 0x0100 /* Unimplemented: leave received OOB data in line */ 00084 #define SO_REUSEPORT 0x0200 /* Unimplemented: allow local address & port reuse */ 00085 00086 #define SO_DONTLINGER ((int)(~SO_LINGER)) 00087 00088 /* 00089 * Additional options, not kept in so_options. 00090 */ 00091 #define SO_SNDBUF 0x1001 /* Unimplemented: send buffer size */ 00092 #define SO_RCVBUF 0x1002 /* receive buffer size */ 00093 #define SO_SNDLOWAT 0x1003 /* Unimplemented: send low-water mark */ 00094 #define SO_RCVLOWAT 0x1004 /* Unimplemented: receive low-water mark */ 00095 #define SO_SNDTIMEO 0x1005 /* Unimplemented: send timeout */ 00096 #define SO_RCVTIMEO 0x1006 /* receive timeout */ 00097 #define SO_ERROR 0x1007 /* get error status and clear */ 00098 #define SO_TYPE 0x1008 /* get socket type */ 00099 #define SO_CONTIMEO 0x1009 /* Unimplemented: connect timeout */ 00100 #define SO_NO_CHECK 0x100a /* don't create UDP checksum */ 00101 00102 00103 /* 00104 * Structure used for manipulating linger option. 00105 */ 00106 struct linger { 00107 int l_onoff; /* option on/off */ 00108 int l_linger; /* linger time */ 00109 }; 00110 00111 /* 00112 * Level number for (get/set)sockopt() to apply to socket itself. 00113 */ 00114 #define SOL_SOCKET 0xfff /* options for socket level */ 00115 00116 00117 #define AF_UNSPEC 0 00118 #define AF_INET 2 00119 #define PF_INET AF_INET 00120 #define PF_UNSPEC AF_UNSPEC 00121 00122 #define IPPROTO_IP 0 00123 #define IPPROTO_TCP 6 00124 #define IPPROTO_UDP 17 00125 #define IPPROTO_UDPLITE 136 00126 00127 /* Flags we can use with send and recv. */ 00128 #define MSG_PEEK 0x01 /* Peeks at an incoming message */ 00129 #define MSG_WAITALL 0x02 /* Unimplemented: Requests that the function block until the full amount of data requested can be returned */ 00130 #define MSG_OOB 0x04 /* Unimplemented: Requests out-of-band data. The significance and semantics of out-of-band data are protocol-specific */ 00131 #define MSG_DONTWAIT 0x08 /* Nonblocking i/o for this operation only */ 00132 #define MSG_MORE 0x10 /* Sender will send more */ 00133 00134 00135 /* 00136 * Options for level IPPROTO_IP 00137 */ 00138 #define IP_TOS 1 00139 #define IP_TTL 2 00140 00141 #if LWIP_TCP 00142 /* 00143 * Options for level IPPROTO_TCP 00144 */ 00145 #define TCP_NODELAY 0x01 /* don't delay send to coalesce packets */ 00146 #define TCP_KEEPALIVE 0x02 /* send KEEPALIVE probes when idle for pcb->keep_idle milliseconds */ 00147 #define TCP_KEEPIDLE 0x03 /* set pcb->keep_idle - Same as TCP_KEEPALIVE, but use seconds for get/setsockopt */ 00148 #define TCP_KEEPINTVL 0x04 /* set pcb->keep_intvl - Use seconds for get/setsockopt */ 00149 #define TCP_KEEPCNT 0x05 /* set pcb->keep_cnt - Use number of probes sent for get/setsockopt */ 00150 #endif /* LWIP_TCP */ 00151 00152 #if LWIP_UDP && LWIP_UDPLITE 00153 /* 00154 * Options for level IPPROTO_UDPLITE 00155 */ 00156 #define UDPLITE_SEND_CSCOV 0x01 /* sender checksum coverage */ 00157 #define UDPLITE_RECV_CSCOV 0x02 /* minimal receiver checksum coverage */ 00158 #endif /* LWIP_UDP && LWIP_UDPLITE*/ 00159 00160 00161 #if LWIP_IGMP 00162 /* 00163 * Options and types for UDP multicast traffic handling 00164 */ 00165 #define IP_ADD_MEMBERSHIP 3 00166 #define IP_DROP_MEMBERSHIP 4 00167 #define IP_MULTICAST_TTL 5 00168 #define IP_MULTICAST_IF 6 00169 #define IP_MULTICAST_LOOP 7 00170 00171 typedef struct ip_mreq { 00172 struct in_addr imr_multiaddr; /* IP multicast address of group */ 00173 struct in_addr imr_interface; /* local IP address of interface */ 00174 } ip_mreq; 00175 #endif /* LWIP_IGMP */ 00176 00177 /* 00178 * The Type of Service provides an indication of the abstract 00179 * parameters of the quality of service desired. These parameters are 00180 * to be used to guide the selection of the actual service parameters 00181 * when transmitting a datagram through a particular network. Several 00182 * networks offer service precedence, which somehow treats high 00183 * precedence traffic as more important than other traffic (generally 00184 * by accepting only traffic above a certain precedence at time of high 00185 * load). The major choice is a three way tradeoff between low-delay, 00186 * high-reliability, and high-throughput. 00187 * The use of the Delay, Throughput, and Reliability indications may 00188 * increase the cost (in some sense) of the service. In many networks 00189 * better performance for one of these parameters is coupled with worse 00190 * performance on another. Except for very unusual cases at most two 00191 * of these three indications should be set. 00192 */ 00193 #define IPTOS_TOS_MASK 0x1E 00194 #define IPTOS_TOS(tos) ((tos) & IPTOS_TOS_MASK) 00195 #define IPTOS_LOWDELAY 0x10 00196 #define IPTOS_THROUGHPUT 0x08 00197 #define IPTOS_RELIABILITY 0x04 00198 #define IPTOS_LOWCOST 0x02 00199 #define IPTOS_MINCOST IPTOS_LOWCOST 00200 00201 /* 00202 * The Network Control precedence designation is intended to be used 00203 * within a network only. The actual use and control of that 00204 * designation is up to each network. The Internetwork Control 00205 * designation is intended for use by gateway control originators only. 00206 * If the actual use of these precedence designations is of concern to 00207 * a particular network, it is the responsibility of that network to 00208 * control the access to, and use of, those precedence designations. 00209 */ 00210 #define IPTOS_PREC_MASK 0xe0 00211 #define IPTOS_PREC(tos) ((tos) & IPTOS_PREC_MASK) 00212 #define IPTOS_PREC_NETCONTROL 0xe0 00213 #define IPTOS_PREC_INTERNETCONTROL 0xc0 00214 #define IPTOS_PREC_CRITIC_ECP 0xa0 00215 #define IPTOS_PREC_FLASHOVERRIDE 0x80 00216 #define IPTOS_PREC_FLASH 0x60 00217 #define IPTOS_PREC_IMMEDIATE 0x40 00218 #define IPTOS_PREC_PRIORITY 0x20 00219 #define IPTOS_PREC_ROUTINE 0x00 00220 00221 00222 /* 00223 * Commands for ioctlsocket(), taken from the BSD file fcntl.h. 00224 * lwip_ioctl only supports FIONREAD and FIONBIO, for now 00225 * 00226 * Ioctl's have the command encoded in the lower word, 00227 * and the size of any in or out parameters in the upper 00228 * word. The high 2 bits of the upper word are used 00229 * to encode the in/out status of the parameter; for now 00230 * we restrict parameters to at most 128 bytes. 00231 */ 00232 #if !defined(FIONREAD) || !defined(FIONBIO) 00233 #define IOCPARM_MASK 0x7fU /* parameters must be < 128 bytes */ 00234 #define IOC_VOID 0x20000000UL /* no parameters */ 00235 #define IOC_OUT 0x40000000UL /* copy out parameters */ 00236 #define IOC_IN 0x80000000UL /* copy in parameters */ 00237 #define IOC_INOUT (IOC_IN|IOC_OUT) 00238 /* 0x20000000 distinguishes new & 00239 old ioctl's */ 00240 #define _IO(x,y) (IOC_VOID|((x)<<8)|(y)) 00241 00242 #define _IOR(x,y,t) (IOC_OUT|(((long)sizeof(t)&IOCPARM_MASK)<<16)|((x)<<8)|(y)) 00243 00244 #define _IOW(x,y,t) (IOC_IN|(((long)sizeof(t)&IOCPARM_MASK)<<16)|((x)<<8)|(y)) 00245 #endif /* !defined(FIONREAD) || !defined(FIONBIO) */ 00246 00247 #ifndef FIONREAD 00248 #define FIONREAD _IOR('f', 127, unsigned long) /* get # bytes to read */ 00249 #endif 00250 #ifndef FIONBIO 00251 #define FIONBIO _IOW('f', 126, unsigned long) /* set/clear non-blocking i/o */ 00252 #endif 00253 00254 /* Socket I/O Controls: unimplemented */ 00255 #ifndef SIOCSHIWAT 00256 #define SIOCSHIWAT _IOW('s', 0, unsigned long) /* set high watermark */ 00257 #define SIOCGHIWAT _IOR('s', 1, unsigned long) /* get high watermark */ 00258 #define SIOCSLOWAT _IOW('s', 2, unsigned long) /* set low watermark */ 00259 #define SIOCGLOWAT _IOR('s', 3, unsigned long) /* get low watermark */ 00260 #define SIOCATMARK _IOR('s', 7, unsigned long) /* at oob mark? */ 00261 #endif 00262 00263 /* Socket flags: */ 00264 #ifndef O_NONBLOCK 00265 #define O_NONBLOCK 04000U 00266 #endif 00267 00268 /* FD_SET used for lwip_select */ 00269 #ifndef FD_SET 00270 #undef FD_SETSIZE 00271 /* Make FD_SETSIZE match NUM_SOCKETS in socket.c */ 00272 #define FD_SETSIZE MEMP_NUM_NETCONN 00273 #define FD_SET(n, p) ((p)->fd_bits[(n)/8] |= (1 << ((n) & 7))) 00274 #define FD_CLR(n, p) ((p)->fd_bits[(n)/8] &= ~(1 << ((n) & 7))) 00275 #define FD_ISSET(n,p) ((p)->fd_bits[(n)/8] & (1 << ((n) & 7))) 00276 #define FD_ZERO(p) memset((void*)(p),0,sizeof(*(p))) 00277 00278 typedef struct fd_set { 00279 unsigned char fd_bits [(FD_SETSIZE+7)/8]; 00280 } fd_set; 00281 00282 #endif /* FD_SET */ 00283 00284 /** LWIP_TIMEVAL_PRIVATE: if you want to use the struct timeval provided 00285 * by your system, set this to 0 and include <sys/time.h> in cc.h */ 00286 #ifndef LWIP_TIMEVAL_PRIVATE 00287 #define LWIP_TIMEVAL_PRIVATE 1 00288 #endif 00289 00290 #if LWIP_TIMEVAL_PRIVATE 00291 struct timeval { 00292 long tv_sec; /* seconds */ 00293 long tv_usec; /* and microseconds */ 00294 }; 00295 #endif /* LWIP_TIMEVAL_PRIVATE */ 00296 00297 void lwip_socket_init(void); 00298 00299 int lwip_accept(int s, struct sockaddr *addr, socklen_t *addrlen); 00300 int lwip_bind(int s, const struct sockaddr *name, socklen_t namelen); 00301 int lwip_shutdown(int s, int how); 00302 int lwip_getpeername (int s, struct sockaddr *name, socklen_t *namelen); 00303 int lwip_getsockname (int s, struct sockaddr *name, socklen_t *namelen); 00304 int lwip_getsockopt (int s, int level, int optname, void *optval, socklen_t *optlen); 00305 int lwip_setsockopt (int s, int level, int optname, const void *optval, socklen_t optlen); 00306 int lwip_close(int s); 00307 int lwip_connect(int s, const struct sockaddr *name, socklen_t namelen); 00308 int lwip_listen(int s, int backlog); 00309 int lwip_recv(int s, void *mem, size_t len, int flags); 00310 int lwip_read(int s, void *mem, size_t len); 00311 int lwip_recvfrom(int s, void *mem, size_t len, int flags, 00312 struct sockaddr *from, socklen_t *fromlen); 00313 int lwip_send(int s, const void *dataptr, size_t size, int flags); 00314 int lwip_sendto(int s, const void *dataptr, size_t size, int flags, 00315 const struct sockaddr *to, socklen_t tolen); 00316 int lwip_socket(int domain, int type, int protocol); 00317 int lwip_write(int s, const void *dataptr, size_t size); 00318 int lwip_select(int maxfdp1, fd_set *readset, fd_set *writeset, fd_set *exceptset, 00319 struct timeval *timeout); 00320 int lwip_ioctl(int s, long cmd, void *argp); 00321 00322 #if LWIP_COMPAT_SOCKETS 00323 #define accept(a,b,c) lwip_accept(a,b,c) 00324 #define bind(a,b,c) lwip_bind(a,b,c) 00325 #define shutdown(a,b) lwip_shutdown(a,b) 00326 #define closesocket(s) lwip_close(s) 00327 #define connect(a,b,c) lwip_connect(a,b,c) 00328 #define getsockname(a,b,c) lwip_getsockname(a,b,c) 00329 #define getpeername(a,b,c) lwip_getpeername(a,b,c) 00330 #define setsockopt(a,b,c,d,e) lwip_setsockopt(a,b,c,d,e) 00331 #define getsockopt(a,b,c,d,e) lwip_getsockopt(a,b,c,d,e) 00332 #define listen(a,b) lwip_listen(a,b) 00333 #define recv(a,b,c,d) lwip_recv(a,b,c,d) 00334 #define recvfrom(a,b,c,d,e,f) lwip_recvfrom(a,b,c,d,e,f) 00335 #define send(a,b,c,d) lwip_send(a,b,c,d) 00336 #define sendto(a,b,c,d,e,f) lwip_sendto(a,b,c,d,e,f) 00337 #define socket(a,b,c) lwip_socket(a,b,c) 00338 #define select(a,b,c,d,e) lwip_select(a,b,c,d,e) 00339 #define ioctlsocket(a,b,c) lwip_ioctl(a,b,c) 00340 00341 #if LWIP_POSIX_SOCKETS_IO_NAMES 00342 #define read(a,b,c) lwip_read(a,b,c) 00343 #define write(a,b,c) lwip_write(a,b,c) 00344 #define close(s) lwip_close(s) 00345 #endif /* LWIP_POSIX_SOCKETS_IO_NAMES */ 00346 00347 #endif /* LWIP_COMPAT_SOCKETS */ 00348 00349 #ifdef __cplusplus 00350 } 00351 #endif 00352 00353 #endif /* LWIP_SOCKET */ 00354 00355 #endif /* __LWIP_SOCKETS_H__ */
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