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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [Common/] [ethernet/] [lwIP/] [api/] [sockets.c] - Rev 637
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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> * * Improved by Marc Boucher <marc@mbsi.ca> and David Haas <dhaas@alum.rpi.edu> * */ #include <string.h> #include <errno.h> #include "lwip/opt.h" #include "lwip/api.h" #include "lwip/arch.h" #include "lwip/sys.h" #include "lwip/sockets.h" #define NUM_SOCKETS MEMP_NUM_NETCONN struct lwip_socket { struct netconn *conn; struct netbuf *lastdata; u16_t lastoffset; u16_t rcvevent; u16_t sendevent; u16_t flags; int err; }; struct lwip_select_cb { struct lwip_select_cb *next; fd_set *readset; fd_set *writeset; fd_set *exceptset; int sem_signalled; sys_sem_t sem; }; static struct lwip_socket sockets[NUM_SOCKETS]; static struct lwip_select_cb *select_cb_list = 0; static sys_sem_t socksem = 0; static sys_sem_t selectsem = 0; static void event_callback(struct netconn *conn, enum netconn_evt evt, u16_t len); static int err_to_errno_table[11] = { 0, /* ERR_OK 0 No error, everything OK. */ ENOMEM, /* ERR_MEM -1 Out of memory error. */ ENOBUFS, /* ERR_BUF -2 Buffer error. */ ECONNABORTED, /* ERR_ABRT -3 Connection aborted. */ ECONNRESET, /* ERR_RST -4 Connection reset. */ ESHUTDOWN, /* ERR_CLSD -5 Connection closed. */ ENOTCONN, /* ERR_CONN -6 Not connected. */ EINVAL, /* ERR_VAL -7 Illegal value. */ EIO, /* ERR_ARG -8 Illegal argument. */ EHOSTUNREACH, /* ERR_RTE -9 Routing problem. */ EADDRINUSE /* ERR_USE -10 Address in use. */ }; #define ERR_TO_ERRNO_TABLE_SIZE \ (sizeof(err_to_errno_table)/sizeof(err_to_errno_table[0])) #define err_to_errno(err) \ (-(err) >= 0 && -(err) < ERR_TO_ERRNO_TABLE_SIZE ? \ err_to_errno_table[-(err)] : EIO) #ifdef ERRNO #define set_errno(err) errno = (err) #else #define set_errno(err) #endif #define sock_set_errno(sk, e) do { \ sk->err = (e); \ set_errno(sk->err); \ } while (0) static struct lwip_socket * get_socket(int s) { struct lwip_socket *sock; if ((s < 0) || (s > NUM_SOCKETS)) { LWIP_DEBUGF(SOCKETS_DEBUG, ("get_socket(%d): invalid\n", s)); set_errno(EBADF); return NULL; } sock = &sockets[s]; if (!sock->conn) { LWIP_DEBUGF(SOCKETS_DEBUG, ("get_socket(%d): not active\n", s)); set_errno(EBADF); return NULL; } return sock; } static int alloc_socket(struct netconn *newconn) { int i; if (!socksem) socksem = sys_sem_new(1); /* Protect socket array */ sys_sem_wait(socksem); /* allocate a new socket identifier */ for(i = 0; i < NUM_SOCKETS; ++i) { if (!sockets[i].conn) { sockets[i].conn = newconn; sockets[i].lastdata = NULL; sockets[i].lastoffset = 0; sockets[i].rcvevent = 0; sockets[i].sendevent = 1; /* TCP send buf is empty */ sockets[i].flags = 0; sockets[i].err = 0; sys_sem_signal(socksem); return i; } } sys_sem_signal(socksem); return -1; } int lwip_accept(int s, struct sockaddr *addr, socklen_t *addrlen) { struct lwip_socket *sock; struct netconn *newconn; struct ip_addr naddr; u16_t port; int newsock; struct sockaddr_in sin; LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_accept(%d)...\n", s)); sock = get_socket(s); if (!sock) { set_errno(EBADF); return -1; } newconn = netconn_accept(sock->conn); /* get the IP address and port of the remote host */ netconn_peer(newconn, &naddr, &port); memset(&sin, 0, sizeof(sin)); sin.sin_len = sizeof(sin); sin.sin_family = AF_INET; sin.sin_port = htons(port); sin.sin_addr.s_addr = naddr.addr; if (*addrlen > sizeof(sin)) *addrlen = sizeof(sin); memcpy(addr, &sin, *addrlen); newsock = alloc_socket(newconn); if (newsock == -1) { netconn_delete(newconn); sock_set_errno(sock, ENOBUFS); return -1; } newconn->callback = event_callback; sock = get_socket(newsock); sys_sem_wait(socksem); sock->rcvevent += -1 - newconn->socket; newconn->socket = newsock; sys_sem_signal(socksem); LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_accept(%d) returning new sock=%d addr=", s, newsock)); ip_addr_debug_print(SOCKETS_DEBUG, &naddr); LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%u\n", port)); sock_set_errno(sock, 0); return newsock; } int lwip_bind(int s, struct sockaddr *name, socklen_t namelen) { struct lwip_socket *sock; struct ip_addr local_addr; u16_t local_port; err_t err; sock = get_socket(s); if (!sock) { set_errno(EBADF); return -1; } local_addr.addr = ((struct sockaddr_in *)name)->sin_addr.s_addr; local_port = ((struct sockaddr_in *)name)->sin_port; LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_bind(%d, addr=", s)); ip_addr_debug_print(SOCKETS_DEBUG, &local_addr); LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%u)\n", ntohs(local_port))); err = netconn_bind(sock->conn, &local_addr, ntohs(local_port)); if (err != ERR_OK) { LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_bind(%d) failed, err=%d\n", s, err)); sock_set_errno(sock, err_to_errno(err)); return -1; } LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_bind(%d) succeeded\n", s)); sock_set_errno(sock, 0); return 0; } int lwip_close(int s) { struct lwip_socket *sock; LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_close(%d)\n", s)); if (!socksem) socksem = sys_sem_new(1); /* We cannot allow multiple closes of the same socket. */ sys_sem_wait(socksem); sock = get_socket(s); if (!sock) { sys_sem_signal(socksem); set_errno(EBADF); return -1; } netconn_delete(sock->conn); if (sock->lastdata) { netbuf_delete(sock->lastdata); } sock->lastdata = NULL; sock->lastoffset = 0; sock->conn = NULL; sys_sem_signal(socksem); sock_set_errno(sock, 0); return 0; } int lwip_connect(int s, struct sockaddr *name, socklen_t namelen) { struct lwip_socket *sock; err_t err; sock = get_socket(s); if (!sock) { set_errno(EBADF); return -1; } if (((struct sockaddr_in *)name)->sin_family == AF_UNSPEC) { LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_connect(%d, AF_UNSPEC)\n", s)); err = netconn_disconnect(sock->conn); } else { struct ip_addr remote_addr; u16_t remote_port; remote_addr.addr = ((struct sockaddr_in *)name)->sin_addr.s_addr; remote_port = ((struct sockaddr_in *)name)->sin_port; LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_connect(%d, addr=", s)); ip_addr_debug_print(SOCKETS_DEBUG, &remote_addr); LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%u)\n", ntohs(remote_port))); err = netconn_connect(sock->conn, &remote_addr, ntohs(remote_port)); } if (err != ERR_OK) { LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_connect(%d) failed, err=%d\n", s, err)); sock_set_errno(sock, err_to_errno(err)); return -1; } LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_connect(%d) succeeded\n", s)); sock_set_errno(sock, 0); return 0; } int lwip_listen(int s, int backlog) { struct lwip_socket *sock; err_t err; LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_listen(%d, backlog=%d)\n", s, backlog)); sock = get_socket(s); if (!sock) { set_errno(EBADF); return -1; } err = netconn_listen(sock->conn); if (err != ERR_OK) { LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_listen(%d) failed, err=%d\n", s, err)); sock_set_errno(sock, err_to_errno(err)); return -1; } sock_set_errno(sock, 0); return 0; } int lwip_recvfrom(int s, void *mem, int len, unsigned int flags, struct sockaddr *from, socklen_t *fromlen) { struct lwip_socket *sock; struct netbuf *buf; u16_t buflen, copylen; struct ip_addr *addr; u16_t port; LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom(%d, %p, %d, 0x%x, ..)\n", s, mem, len, flags)); sock = get_socket(s); if (!sock) { set_errno(EBADF); return -1; } /* Check if there is data left from the last recv operation. */ if (sock->lastdata) { buf = sock->lastdata; } else { /* If this is non-blocking call, then check first */ if (((flags & MSG_DONTWAIT) || (sock->flags & O_NONBLOCK)) && !sock->rcvevent) { LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom(%d): returning EWOULDBLOCK\n", s)); sock_set_errno(sock, EWOULDBLOCK); return -1; } /* No data was left from the previous operation, so we try to get some from the network. */ buf = netconn_recv(sock->conn); if (!buf) { /* We should really do some error checking here. */ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom(%d): buf == NULL!\n", s)); sock_set_errno(sock, 0); return 0; } } buflen = netbuf_len(buf); buflen -= sock->lastoffset; if (len > buflen) { copylen = buflen; } else { copylen = len; } /* copy the contents of the received buffer into the supplied memory pointer mem */ netbuf_copy_partial(buf, mem, copylen, sock->lastoffset); /* Check to see from where the data was. */ if (from && fromlen) { struct sockaddr_in sin; addr = netbuf_fromaddr(buf); port = netbuf_fromport(buf); memset(&sin, 0, sizeof(sin)); sin.sin_len = sizeof(sin); sin.sin_family = AF_INET; sin.sin_port = htons(port); sin.sin_addr.s_addr = addr->addr; if (*fromlen > sizeof(sin)) *fromlen = sizeof(sin); memcpy(from, &sin, *fromlen); LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom(%d): addr=", s)); ip_addr_debug_print(SOCKETS_DEBUG, addr); LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%u len=%u\n", port, copylen)); } else { #if SOCKETS_DEBUG addr = netbuf_fromaddr(buf); port = netbuf_fromport(buf); LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom(%d): addr=", s)); ip_addr_debug_print(SOCKETS_DEBUG, addr); LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%u len=%u\n", port, copylen)); #endif } /* If this is a TCP socket, check if there is data left in the buffer. If so, it should be saved in the sock structure for next time around. */ if (netconn_type(sock->conn) == NETCONN_TCP && buflen - copylen > 0) { sock->lastdata = buf; sock->lastoffset += copylen; } else { sock->lastdata = NULL; sock->lastoffset = 0; netbuf_delete(buf); } sock_set_errno(sock, 0); return copylen; } int lwip_read(int s, void *mem, int len) { return lwip_recvfrom(s, mem, len, 0, NULL, NULL); } int lwip_recv(int s, void *mem, int len, unsigned int flags) { return lwip_recvfrom(s, mem, len, flags, NULL, NULL); } int lwip_send(int s, void *data, int size, unsigned int flags) { struct lwip_socket *sock; struct netbuf *buf; err_t err; LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_send(%d, data=%p, size=%d, flags=0x%x)\n", s, data, size, flags)); sock = get_socket(s); if (!sock) { set_errno(EBADF); return -1; } switch (netconn_type(sock->conn)) { case NETCONN_RAW: case NETCONN_UDP: case NETCONN_UDPLITE: case NETCONN_UDPNOCHKSUM: /* create a buffer */ buf = netbuf_new(); if (!buf) { LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_send(%d) ENOBUFS\n", s)); sock_set_errno(sock, ENOBUFS); return -1; } /* make the buffer point to the data that should be sent */ netbuf_ref(buf, data, size); /* send the data */ err = netconn_send(sock->conn, buf); /* deallocated the buffer */ netbuf_delete(buf); break; case NETCONN_TCP: err = netconn_write(sock->conn, data, size, NETCONN_COPY); break; default: err = ERR_ARG; break; } if (err != ERR_OK) { LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_send(%d) err=%d\n", s, err)); sock_set_errno(sock, err_to_errno(err)); return -1; } LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_send(%d) ok size=%d\n", s, size)); sock_set_errno(sock, 0); return size; } int lwip_sendto(int s, void *data, int size, unsigned int flags, struct sockaddr *to, socklen_t tolen) { struct lwip_socket *sock; struct ip_addr remote_addr, addr; u16_t remote_port, port; int ret,connected; sock = get_socket(s); if (!sock) { set_errno(EBADF); return -1; } /* get the peer if currently connected */ connected = (netconn_peer(sock->conn, &addr, &port) == ERR_OK); remote_addr.addr = ((struct sockaddr_in *)to)->sin_addr.s_addr; remote_port = ((struct sockaddr_in *)to)->sin_port; LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_sendto(%d, data=%p, size=%d, flags=0x%x to=", s, data, size, flags)); ip_addr_debug_print(SOCKETS_DEBUG, &remote_addr); LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%u\n", ntohs(remote_port))); netconn_connect(sock->conn, &remote_addr, ntohs(remote_port)); ret = lwip_send(s, data, size, flags); /* reset the remote address and port number of the connection */ if (connected) netconn_connect(sock->conn, &addr, port); else netconn_disconnect(sock->conn); return ret; } int lwip_socket(int domain, int type, int protocol) { struct netconn *conn; int i; /* create a netconn */ switch (type) { case SOCK_RAW: conn = netconn_new_with_proto_and_callback(NETCONN_RAW, protocol, event_callback); LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_socket(%s, SOCK_RAW, %d) = ", domain == PF_INET ? "PF_INET" : "UNKNOWN", protocol)); break; case SOCK_DGRAM: conn = netconn_new_with_callback(NETCONN_UDP, event_callback); LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_socket(%s, SOCK_DGRAM, %d) = ", domain == PF_INET ? "PF_INET" : "UNKNOWN", protocol)); break; case SOCK_STREAM: conn = netconn_new_with_callback(NETCONN_TCP, event_callback); LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_socket(%s, SOCK_STREAM, %d) = ", domain == PF_INET ? "PF_INET" : "UNKNOWN", protocol)); break; default: LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_socket(%d, %d/UNKNOWN, %d) = -1\n", domain, type, protocol)); set_errno(EINVAL); return -1; } if (!conn) { LWIP_DEBUGF(SOCKETS_DEBUG, ("-1 / ENOBUFS (could not create netconn)\n")); set_errno(ENOBUFS); return -1; } i = alloc_socket(conn); if (i == -1) { netconn_delete(conn); set_errno(ENOBUFS); return -1; } conn->socket = i; LWIP_DEBUGF(SOCKETS_DEBUG, ("%d\n", i)); set_errno(0); return i; } int lwip_write(int s, void *data, int size) { return lwip_send(s, data, size, 0); } static int lwip_selscan(int maxfdp1, fd_set *readset, fd_set *writeset, fd_set *exceptset) { int i, nready = 0; fd_set lreadset, lwriteset, lexceptset; struct lwip_socket *p_sock; FD_ZERO(&lreadset); FD_ZERO(&lwriteset); FD_ZERO(&lexceptset); /* Go through each socket in each list to count number of sockets which currently match */ for(i = 0; i < maxfdp1; i++) { if (FD_ISSET(i, readset)) { /* See if netconn of this socket is ready for read */ p_sock = get_socket(i); if (p_sock && (p_sock->lastdata || p_sock->rcvevent)) { FD_SET(i, &lreadset); LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_selscan: fd=%d ready for reading\n", i)); nready++; } } if (FD_ISSET(i, writeset)) { /* See if netconn of this socket is ready for write */ p_sock = get_socket(i); if (p_sock && p_sock->sendevent) { FD_SET(i, &lwriteset); LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_selscan: fd=%d ready for writing\n", i)); nready++; } } } *readset = lreadset; *writeset = lwriteset; FD_ZERO(exceptset); return nready; } int lwip_select(int maxfdp1, fd_set *readset, fd_set *writeset, fd_set *exceptset, struct timeval *timeout) { int i; int nready; fd_set lreadset, lwriteset, lexceptset; u32_t msectimeout; struct lwip_select_cb select_cb; struct lwip_select_cb *p_selcb; LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_select(%d, %p, %p, %p, tvsec=%ld tvusec=%ld)\n", maxfdp1, (void *)readset, (void *) writeset, (void *) exceptset, timeout ? timeout->tv_sec : -1L, timeout ? timeout->tv_usec : -1L)); select_cb.next = 0; select_cb.readset = readset; select_cb.writeset = writeset; select_cb.exceptset = exceptset; select_cb.sem_signalled = 0; /* Protect ourselves searching through the list */ if (!selectsem) selectsem = sys_sem_new(1); sys_sem_wait(selectsem); if (readset) lreadset = *readset; else FD_ZERO(&lreadset); if (writeset) lwriteset = *writeset; else FD_ZERO(&lwriteset); if (exceptset) lexceptset = *exceptset; else FD_ZERO(&lexceptset); /* Go through each socket in each list to count number of sockets which currently match */ nready = lwip_selscan(maxfdp1, &lreadset, &lwriteset, &lexceptset); /* If we don't have any current events, then suspend if we are supposed to */ if (!nready) { if (timeout && timeout->tv_sec == 0 && timeout->tv_usec == 0) { sys_sem_signal(selectsem); if (readset) FD_ZERO(readset); if (writeset) FD_ZERO(writeset); if (exceptset) FD_ZERO(exceptset); LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_select: no timeout, returning 0\n")); set_errno(0); return 0; } /* add our semaphore to list */ /* We don't actually need any dynamic memory. Our entry on the * list is only valid while we are in this function, so it's ok * to use local variables */ select_cb.sem = sys_sem_new(0); /* Note that we are still protected */ /* Put this select_cb on top of list */ select_cb.next = select_cb_list; select_cb_list = &select_cb; /* Now we can safely unprotect */ sys_sem_signal(selectsem); /* Now just wait to be woken */ if (timeout == 0) /* Wait forever */ msectimeout = 0; else msectimeout = ((timeout->tv_sec * 1000) + ((timeout->tv_usec + 500)/1000)); i = sys_sem_wait_timeout(select_cb.sem, msectimeout); /* Take us off the list */ sys_sem_wait(selectsem); if (select_cb_list == &select_cb) select_cb_list = select_cb.next; else for (p_selcb = select_cb_list; p_selcb; p_selcb = p_selcb->next) if (p_selcb->next == &select_cb) { p_selcb->next = select_cb.next; break; } sys_sem_signal(selectsem); sys_sem_free(select_cb.sem); if (i == 0) /* Timeout */ { if (readset) FD_ZERO(readset); if (writeset) FD_ZERO(writeset); if (exceptset) FD_ZERO(exceptset); LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_select: timeout expired\n")); set_errno(0); return 0; } if (readset) lreadset = *readset; else FD_ZERO(&lreadset); if (writeset) lwriteset = *writeset; else FD_ZERO(&lwriteset); if (exceptset) lexceptset = *exceptset; else FD_ZERO(&lexceptset); /* See what's set */ nready = lwip_selscan(maxfdp1, &lreadset, &lwriteset, &lexceptset); } else sys_sem_signal(selectsem); if (readset) *readset = lreadset; if (writeset) *writeset = lwriteset; if (exceptset) *exceptset = lexceptset; LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_select: nready=%d\n", nready)); set_errno(0); return nready; } static void event_callback(struct netconn *conn, enum netconn_evt evt, u16_t len) { int s; struct lwip_socket *sock; struct lwip_select_cb *scb; /* Get socket */ if (conn) { s = conn->socket; if (s < 0) { /* Data comes in right away after an accept, even though * the server task might not have created a new socket yet. * Just count down (or up) if that's the case and we * will use the data later. Note that only receive events * can happen before the new socket is set up. */ if (evt == NETCONN_EVT_RCVPLUS) conn->socket--; return; } sock = get_socket(s); if (!sock) return; } else return; if (!selectsem) selectsem = sys_sem_new(1); sys_sem_wait(selectsem); /* Set event as required */ switch (evt) { case NETCONN_EVT_RCVPLUS: sock->rcvevent++; break; case NETCONN_EVT_RCVMINUS: sock->rcvevent--; break; case NETCONN_EVT_SENDPLUS: sock->sendevent = 1; break; case NETCONN_EVT_SENDMINUS: sock->sendevent = 0; break; } sys_sem_signal(selectsem); /* Now decide if anyone is waiting for this socket */ /* NOTE: This code is written this way to protect the select link list but to avoid a deadlock situation by releasing socksem before signalling for the select. This means we need to go through the list multiple times ONLY IF a select was actually waiting. We go through the list the number of waiting select calls + 1. This list is expected to be small. */ while (1) { sys_sem_wait(selectsem); for (scb = select_cb_list; scb; scb = scb->next) { if (scb->sem_signalled == 0) { /* Test this select call for our socket */ if (scb->readset && FD_ISSET(s, scb->readset)) if (sock->rcvevent) break; if (scb->writeset && FD_ISSET(s, scb->writeset)) if (sock->sendevent) break; } } if (scb) { scb->sem_signalled = 1; sys_sem_signal(selectsem); sys_sem_signal(scb->sem); } else { sys_sem_signal(selectsem); break; } } } int lwip_shutdown(int s, int how) { LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_shutdown(%d, how=%d)\n", s, how)); return lwip_close(s); /* XXX temporary hack until proper implementation */ } int lwip_getpeername (int s, struct sockaddr *name, socklen_t *namelen) { struct lwip_socket *sock; struct sockaddr_in sin; struct ip_addr naddr; sock = get_socket(s); if (!sock) { set_errno(EBADF); return -1; } memset(&sin, 0, sizeof(sin)); sin.sin_len = sizeof(sin); sin.sin_family = AF_INET; /* get the IP address and port of the remote host */ netconn_peer(sock->conn, &naddr, &sin.sin_port); LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getpeername(%d, addr=", s)); ip_addr_debug_print(SOCKETS_DEBUG, &naddr); LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%d)\n", sin.sin_port)); sin.sin_port = htons(sin.sin_port); sin.sin_addr.s_addr = naddr.addr; if (*namelen > sizeof(sin)) *namelen = sizeof(sin); memcpy(name, &sin, *namelen); sock_set_errno(sock, 0); return 0; } int lwip_getsockname (int s, struct sockaddr *name, socklen_t *namelen) { struct lwip_socket *sock; struct sockaddr_in sin; struct ip_addr *naddr; sock = get_socket(s); if (!sock) { set_errno(EBADF); return -1; } memset(&sin, 0, sizeof(sin)); sin.sin_len = sizeof(sin); sin.sin_family = AF_INET; /* get the IP address and port of the remote host */ netconn_addr(sock->conn, &naddr, &sin.sin_port); LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockname(%d, addr=", s)); ip_addr_debug_print(SOCKETS_DEBUG, naddr); LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%d)\n", sin.sin_port)); sin.sin_port = htons(sin.sin_port); sin.sin_addr.s_addr = naddr->addr; if (*namelen > sizeof(sin)) *namelen = sizeof(sin); memcpy(name, &sin, *namelen); sock_set_errno(sock, 0); return 0; } int lwip_getsockopt (int s, int level, int optname, void *optval, socklen_t *optlen) { int err = 0; struct lwip_socket *sock = get_socket(s); if(!sock) { set_errno(EBADF); return -1; } if( NULL == optval || NULL == optlen ) { sock_set_errno( sock, EFAULT ); return -1; } /* Do length and type checks for the various options first, to keep it readable. */ switch( level ) { /* Level: SOL_SOCKET */ case SOL_SOCKET: switch(optname) { case SO_ACCEPTCONN: case SO_BROADCAST: /* UNIMPL case SO_DEBUG: */ /* UNIMPL case SO_DONTROUTE: */ case SO_ERROR: case SO_KEEPALIVE: /* UNIMPL case SO_OOBINLINE: */ /* UNIMPL case SO_RCVBUF: */ /* UNIMPL case SO_SNDBUF: */ /* UNIMPL case SO_RCVLOWAT: */ /* UNIMPL case SO_SNDLOWAT: */ #if SO_REUSE case SO_REUSEADDR: case SO_REUSEPORT: #endif /* SO_REUSE */ case SO_TYPE: /* UNIMPL case SO_USELOOPBACK: */ if( *optlen < sizeof(int) ) { err = EINVAL; } break; default: LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, SOL_SOCKET, UNIMPL: optname=0x%x, ..)\n", s, optname)); err = ENOPROTOOPT; } /* switch */ break; /* Level: IPPROTO_IP */ case IPPROTO_IP: switch(optname) { /* UNIMPL case IP_HDRINCL: */ /* UNIMPL case IP_RCVDSTADDR: */ /* UNIMPL case IP_RCVIF: */ case IP_TTL: case IP_TOS: if( *optlen < sizeof(int) ) { err = EINVAL; } break; default: LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, UNIMPL: optname=0x%x, ..)\n", s, optname)); err = ENOPROTOOPT; } /* switch */ break; /* Level: IPPROTO_TCP */ case IPPROTO_TCP: if( *optlen < sizeof(int) ) { err = EINVAL; break; } /* If this is no TCP socket, ignore any options. */ if ( sock->conn->type != NETCONN_TCP ) return 0; switch( optname ) { case TCP_NODELAY: case TCP_KEEPALIVE: break; default: LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_TCP, UNIMPL: optname=0x%x, ..)\n", s, optname)); err = ENOPROTOOPT; } /* switch */ break; /* UNDEFINED LEVEL */ default: LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, level=0x%x, UNIMPL: optname=0x%x, ..)\n", s, level, optname)); err = ENOPROTOOPT; } /* switch */ if( 0 != err ) { sock_set_errno(sock, err); return -1; } /* Now do the actual option processing */ switch(level) { /* Level: SOL_SOCKET */ case SOL_SOCKET: switch( optname ) { /* The option flags */ case SO_ACCEPTCONN: case SO_BROADCAST: /* UNIMPL case SO_DEBUG: */ /* UNIMPL case SO_DONTROUTE: */ case SO_KEEPALIVE: /* UNIMPL case SO_OOBINCLUDE: */ #if SO_REUSE case SO_REUSEADDR: case SO_REUSEPORT: #endif /* SO_REUSE */ /*case SO_USELOOPBACK: UNIMPL */ *(int*)optval = sock->conn->pcb.tcp->so_options & optname; LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, SOL_SOCKET, optname=0x%x, ..) = %s\n", s, optname, (*(int*)optval?"on":"off"))); break; case SO_TYPE: switch (sock->conn->type) { case NETCONN_RAW: *(int*)optval = SOCK_RAW; break; case NETCONN_TCP: *(int*)optval = SOCK_STREAM; break; case NETCONN_UDP: case NETCONN_UDPLITE: case NETCONN_UDPNOCHKSUM: *(int*)optval = SOCK_DGRAM; break; default: /* unrecognized socket type */ *(int*)optval = sock->conn->type; LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, SOL_SOCKET, SO_TYPE): unrecognized socket type %d\n", s, *(int *)optval)); } /* switch */ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, SOL_SOCKET, SO_TYPE) = %d\n", s, *(int *)optval)); break; case SO_ERROR: *(int *)optval = sock->err; sock->err = 0; LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, SOL_SOCKET, SO_ERROR) = %d\n", s, *(int *)optval)); break; } /* switch */ break; /* Level: IPPROTO_IP */ case IPPROTO_IP: switch( optname ) { case IP_TTL: *(int*)optval = sock->conn->pcb.tcp->ttl; LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, IP_TTL) = %d\n", s, *(int *)optval)); break; case IP_TOS: *(int*)optval = sock->conn->pcb.tcp->tos; LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, IP_TOS) = %d\n", s, *(int *)optval)); break; } /* switch */ break; /* Level: IPPROTO_TCP */ case IPPROTO_TCP: switch( optname ) { case TCP_NODELAY: *(int*)optval = (sock->conn->pcb.tcp->flags & TF_NODELAY); LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_TCP, TCP_NODELAY) = %s\n", s, (*(int*)optval)?"on":"off") ); break; case TCP_KEEPALIVE: *(int*)optval = (int)sock->conn->pcb.tcp->keepalive; LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, TCP_KEEPALIVE) = %d\n", s, *(int *)optval)); break; } /* switch */ break; } sock_set_errno(sock, err); return err ? -1 : 0; } int lwip_setsockopt (int s, int level, int optname, const void *optval, socklen_t optlen) { struct lwip_socket *sock = get_socket(s); int err = 0; if(!sock) { set_errno(EBADF); return -1; } if( NULL == optval ) { sock_set_errno( sock, EFAULT ); return -1; } /* Do length and type checks for the various options first, to keep it readable. */ switch( level ) { /* Level: SOL_SOCKET */ case SOL_SOCKET: switch(optname) { case SO_BROADCAST: /* UNIMPL case SO_DEBUG: */ /* UNIMPL case SO_DONTROUTE: */ case SO_KEEPALIVE: /* UNIMPL case SO_OOBINLINE: */ /* UNIMPL case SO_RCVBUF: */ /* UNIMPL case SO_SNDBUF: */ /* UNIMPL case SO_RCVLOWAT: */ /* UNIMPL case SO_SNDLOWAT: */ #if SO_REUSE case SO_REUSEADDR: case SO_REUSEPORT: #endif /* SO_REUSE */ /* UNIMPL case SO_USELOOPBACK: */ if( optlen < sizeof(int) ) { err = EINVAL; } break; default: LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, SOL_SOCKET, UNIMPL: optname=0x%x, ..)\n", s, optname)); err = ENOPROTOOPT; } /* switch */ break; /* Level: IPPROTO_IP */ case IPPROTO_IP: switch(optname) { /* UNIMPL case IP_HDRINCL: */ /* UNIMPL case IP_RCVDSTADDR: */ /* UNIMPL case IP_RCVIF: */ case IP_TTL: case IP_TOS: if( optlen < sizeof(int) ) { err = EINVAL; } break; default: LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_IP, UNIMPL: optname=0x%x, ..)\n", s, optname)); err = ENOPROTOOPT; } /* switch */ break; /* Level: IPPROTO_TCP */ case IPPROTO_TCP: if( optlen < sizeof(int) ) { err = EINVAL; break; } /* If this is no TCP socket, ignore any options. */ if ( sock->conn->type != NETCONN_TCP ) return 0; switch( optname ) { case TCP_NODELAY: case TCP_KEEPALIVE: break; default: LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, UNIMPL: optname=0x%x, ..)\n", s, optname)); err = ENOPROTOOPT; } /* switch */ break; /* UNDEFINED LEVEL */ default: LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, level=0x%x, UNIMPL: optname=0x%x, ..)\n", s, level, optname)); err = ENOPROTOOPT; } /* switch */ if( 0 != err ) { sock_set_errno(sock, err); return -1; } /* Now do the actual option processing */ switch(level) { /* Level: SOL_SOCKET */ case SOL_SOCKET: switch(optname) { /* The option flags */ case SO_BROADCAST: /* UNIMPL case SO_DEBUG: */ /* UNIMPL case SO_DONTROUTE: */ case SO_KEEPALIVE: /* UNIMPL case SO_OOBINCLUDE: */ #if SO_REUSE case SO_REUSEADDR: case SO_REUSEPORT: #endif /* SO_REUSE */ /* UNIMPL case SO_USELOOPBACK: */ if ( *(int*)optval ) { sock->conn->pcb.tcp->so_options |= optname; } else { sock->conn->pcb.tcp->so_options &= ~optname; } LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, SOL_SOCKET, optname=0x%x, ..) -> %s\n", s, optname, (*(int*)optval?"on":"off"))); break; } /* switch */ break; /* Level: IPPROTO_IP */ case IPPROTO_IP: switch( optname ) { case IP_TTL: sock->conn->pcb.tcp->ttl = (u8_t)(*(int*)optval); LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_IP, IP_TTL, ..) -> %u\n", s, sock->conn->pcb.tcp->ttl)); break; case IP_TOS: sock->conn->pcb.tcp->tos = (u8_t)(*(int*)optval); LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_IP, IP_TOS, ..)-> %u\n", s, sock->conn->pcb.tcp->tos)); break; } /* switch */ break; /* Level: IPPROTO_TCP */ case IPPROTO_TCP: switch( optname ) { case TCP_NODELAY: if ( *(int*)optval ) { sock->conn->pcb.tcp->flags |= TF_NODELAY; } else { sock->conn->pcb.tcp->flags &= ~TF_NODELAY; } LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, TCP_NODELAY) -> %s\n", s, (*(int *)optval)?"on":"off") ); break; case TCP_KEEPALIVE: sock->conn->pcb.tcp->keepalive = (u32_t)(*(int*)optval); LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, TCP_KEEPALIVE) -> %lu\n", s, sock->conn->pcb.tcp->keepalive)); break; } /* switch */ break; } /* switch */ sock_set_errno(sock, err); return err ? -1 : 0; } int lwip_ioctl(int s, long cmd, void *argp) { struct lwip_socket *sock = get_socket(s); if(!sock) { set_errno(EBADF); return -1; } switch (cmd) { case FIONREAD: if (!argp) { sock_set_errno(sock, EINVAL); return -1; } *((u16_t*)argp) = sock->conn->recv_avail; LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_ioctl(%d, FIONREAD, %p) = %u\n", s, argp, *((u16_t*)argp))); sock_set_errno(sock, 0); return 0; case FIONBIO: if (argp && *(u32_t*)argp) sock->flags |= O_NONBLOCK; else sock->flags &= ~O_NONBLOCK; LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_ioctl(%d, FIONBIO, %d)\n", s, !!(sock->flags & O_NONBLOCK))); sock_set_errno(sock, 0); return 0; default: LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_ioctl(%d, UNIMPL: 0x%lx, %p)\n", s, cmd, argp)); sock_set_errno(sock, ENOSYS); /* not yet implemented */ return -1; } }
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