/** * @file * Sockets BSD-Like API module * */ /* * 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 * * Improved by Marc Boucher and David Haas * */ #include "lwip/opt.h" #if LWIP_SOCKET /* don't build if not configured for use in lwipopts.h */ #include "lwip/sockets.h" #include "lwip/api.h" #include "lwip/sys.h" #include "lwip/igmp.h" #include "lwip/inet.h" #include "lwip/tcp.h" #include "lwip/raw.h" #include "lwip/udp.h" #include "lwip/tcpip.h" #include #define NUM_SOCKETS MEMP_NUM_NETCONN /** Contains all internal pointers and states used for a socket */ struct lwip_socket { /** sockets currently are built on netconns, each socket has one netconn */ struct netconn *conn; /** data that was left from the previous read */ struct netbuf *lastdata; /** offset in the data that was left from the previous read */ u16_t lastoffset; /** number of times data was received, set by event_callback(), tested by the receive and select functions */ u16_t rcvevent; /** number of times data was received, set by event_callback(), tested by select */ u16_t sendevent; /** socket flags (currently, only used for O_NONBLOCK) */ u16_t flags; /** last error that occurred on this socket */ int err; }; /** Description for a task waiting in select */ struct lwip_select_cb { /** Pointer to the next waiting task */ struct lwip_select_cb *next; /** readset passed to select */ fd_set *readset; /** writeset passed to select */ fd_set *writeset; /** unimplemented: exceptset passed to select */ fd_set *exceptset; /** don't signal the same semaphore twice: set to 1 when signalled */ int sem_signalled; /** semaphore to wake up a task waiting for select */ sys_sem_t sem; }; /** This struct is used to pass data to the set/getsockopt_internal * functions running in tcpip_thread context (only a void* is allowed) */ struct lwip_setgetsockopt_data { /** socket struct for which to change options */ struct lwip_socket *sock; /** socket index for which to change options */ int s; /** level of the option to process */ int level; /** name of the option to process */ int optname; /** set: value to set the option to * get: value of the option is stored here */ void *optval; /** size of *optval */ socklen_t *optlen; /** if an error occures, it is temporarily stored here */ err_t err; }; /** The global array of available sockets */ static struct lwip_socket sockets[NUM_SOCKETS]; /** The global list of tasks waiting for select */ static struct lwip_select_cb *select_cb_list; /** Semaphore protecting the sockets array */ static sys_sem_t socksem; /** Semaphore protecting select_cb_list */ static sys_sem_t selectsem; /** Table to quickly map an lwIP error (err_t) to a socket error * by using -err as an index */ static const int err_to_errno_table[] = { 0, /* ERR_OK 0 No error, everything OK. */ ENOMEM, /* ERR_MEM -1 Out of memory error. */ ENOBUFS, /* ERR_BUF -2 Buffer error. */ EHOSTUNREACH, /* ERR_RTE -3 Routing problem. */ ECONNABORTED, /* ERR_ABRT -4 Connection aborted. */ ECONNRESET, /* ERR_RST -5 Connection reset. */ ESHUTDOWN, /* ERR_CLSD -6 Connection closed. */ ENOTCONN, /* ERR_CONN -7 Not connected. */ EINVAL, /* ERR_VAL -8 Illegal value. */ EIO, /* ERR_ARG -9 Illegal argument. */ EADDRINUSE, /* ERR_USE -10 Address in use. */ -1, /* ERR_IF -11 Low-level netif error */ -1, /* ERR_ISCONN -12 Already connected. */ ETIMEDOUT, /* ERR_TIMEOUT -13 Timeout */ EINPROGRESS /* ERR_INPROGRESS -14 Operation in progress */ }; #define ERR_TO_ERRNO_TABLE_SIZE \ (sizeof(err_to_errno_table)/sizeof(err_to_errno_table[0])) #define err_to_errno(err) \ ((unsigned)(-(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) /* Forward delcaration of some functions */ static void event_callback(struct netconn *conn, enum netconn_evt evt, u16_t len); static void lwip_getsockopt_internal(void *arg); static void lwip_setsockopt_internal(void *arg); /** * Initialize this module. This function has to be called before any other * functions in this module! */ void lwip_socket_init(void) { socksem = sys_sem_new(1); selectsem = sys_sem_new(1); } /** * Map a externally used socket index to the internal socket representation. * * @param s externally used socket index * @return struct lwip_socket for the socket or NULL if not found */ 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; } /** * Allocate a new socket for a given netconn. * * @param newconn the netconn for which to allocate a socket * @return the index of the new socket; -1 on error */ static int alloc_socket(struct netconn *newconn) { int i; /* 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; } /* Below this, the well-known socket functions are implemented. * Use google.com or opengroup.org to get a good description :-) * * Exceptions are documented! */ int lwip_accept(int s, struct sockaddr *addr, socklen_t *addrlen) { struct lwip_socket *sock, *nsock; struct netconn *newconn; struct ip_addr naddr; u16_t port; int newsock; struct sockaddr_in sin; err_t err; LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_accept(%d)...\n", s)); sock = get_socket(s); if (!sock) return -1; newconn = netconn_accept(sock->conn); if (!newconn) { LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_accept(%d) failed, err=%d\n", s, sock->conn->err)); sock_set_errno(sock, err_to_errno(sock->conn->err)); return -1; } /* get the IP address and port of the remote host */ err = netconn_peer(newconn, &naddr, &port); if (err != ERR_OK) { netconn_delete(newconn); sock_set_errno(sock, err_to_errno(err)); return -1; } 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); SMEMCPY(addr, &sin, *addrlen); newsock = alloc_socket(newconn); if (newsock == -1) { netconn_delete(newconn); sock_set_errno(sock, ENFILE); return -1; } LWIP_ASSERT("invalid socket index", (newsock >= 0) && (newsock < NUM_SOCKETS)); newconn->callback = event_callback; nsock = &sockets[newsock]; LWIP_ASSERT("invalid socket pointer", nsock != NULL); sys_sem_wait(socksem); /* See event_callback: If data comes in right away after an accept, even * though the server task might not have created a new socket yet. * In that case, newconn->socket is counted down (newconn->socket--), * so nsock->rcvevent is >= 1 here! */ nsock->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) return -1; LWIP_ERROR("lwip_bind: invalid address", ((namelen == sizeof(struct sockaddr_in)) && ((((struct sockaddr_in *)name)->sin_family) == AF_INET)), sock_set_errno(sock, err_to_errno(ERR_ARG)); 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)); sock = get_socket(s); if (!sock) { return -1; } netconn_delete(sock->conn); sys_sem_wait(socksem); if (sock->lastdata) { netbuf_delete(sock->lastdata); } sock->lastdata = NULL; sock->lastoffset = 0; sock->conn = NULL; sock_set_errno(sock, 0); sys_sem_signal(socksem); return 0; } int lwip_connect(int s, const struct sockaddr *name, socklen_t namelen) { struct lwip_socket *sock; err_t err; sock = get_socket(s); if (!sock) return -1; LWIP_ERROR("lwip_connect: invalid address", ((namelen == sizeof(struct sockaddr_in)) && ((((struct sockaddr_in *)name)->sin_family) == AF_INET)), sock_set_errno(sock, err_to_errno(ERR_ARG)); 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; } /** * Set a socket into listen mode. * The socket may not have been used for another connection previously. * * @param s the socket to set to listening mode * @param backlog (ATTENTION: need TCP_LISTEN_BACKLOG=1) * @return 0 on success, non-zero on failure */ 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) return -1; /* limit the "backlog" parameter to fit in an u8_t */ if (backlog < 0) { backlog = 0; } if (backlog > 0xff) { backlog = 0xff; } err = netconn_listen_with_backlog(sock->conn, backlog); 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; } #ifdef KLH_TD10887_DEBUG // this table will record execution paths in calls to lwip_recvfrom // Of interest is the aggregation of single TCP receive packets into // the caller's receive buffer and whether PUSH flags present in TCP // packets are relayed to the caller struct Dbg_rec { int a; int b; int c; int d; int e; }; #define DBG_TBL_SIZE 800 struct Dbg_rec dbg_tbl[DBG_TBL_SIZE]; int dbg_idx = 0; void debug(int a, int b, int c, int d, int e) { if (dbg_idx < DBG_TBL_SIZE) { dbg_tbl[dbg_idx].a = a; dbg_tbl[dbg_idx].b = b; dbg_tbl[dbg_idx].c = c; dbg_tbl[dbg_idx].d = d; dbg_tbl[dbg_idx].e = e; dbg_idx++; } } void reset_debug_table() { memset(dbg_tbl, 0, sizeof(dbg_tbl)); dbg_idx = 0; } #endif 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, off = 0; struct ip_addr *addr; u16_t port; u8_t done = 0; LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom(%d, %p, %d, 0x%x, ..)\n", s, mem, len, flags)); #ifdef KLH_TD10887_DEBUG if (s == 0 && mem == 0 && len == 0 && flags == 0) { reset_debug_table(); return 0; } debug(0, s, (int)mem, len, flags); #endif sock = get_socket(s); if (!sock) return -1; do { LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom: top while sock->lastdata=%p\n", (void*)sock->lastdata)); /* Check if there is data left from the last recv operation. */ if (sock->lastdata) { #ifdef KLH_TD10887_DEBUG debug(1, 0, (int)sock->lastdata, 0, 0); #endif 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); #ifdef KLH_TD10887_DEBUG debug(2, 1, 1, 1, 1); #endif return -1; } /* No data was left from the previous operation, so we try to get some from the network. */ sock->lastdata = buf = netconn_recv(sock->conn); LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom: netconn_recv netbuf=%p\n", (void*)buf)); 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, (((sock->conn->pcb.ip!=NULL) && (sock->conn->err==ERR_OK))?ETIMEDOUT:err_to_errno(sock->conn->err))); #ifdef KLH_TD10887_DEBUG debug(3, 2, (int)sock->conn->pcb.ip, sock->conn->err, sock->err); #endif return 0; } } buflen = netbuf_len(buf); LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom: buflen=%d len=%d off=%d sock->lastoffset=%d\n", buflen, len, off, sock->lastoffset)); #ifdef KLH_TD10887_DEBUG debug(4, buflen, len, off, sock->lastoffset); #endif 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, (u8_t*)mem + off, copylen, sock->lastoffset); off += copylen; if (netconn_type(sock->conn) == NETCONN_TCP) { len -= copylen; #ifdef KLH_TD10887_DEBUG debug(5, len, off, buf->p->flags & PBUF_FLAG_PUSH, sock->rcvevent); #endif if ( (len <= 0) || (buf->p->flags & PBUF_FLAG_PUSH) || !sock->rcvevent) { done = 1; } } else { done = 1; #ifdef KLH_TD10887_DEBUG debug(6, 4, 4, 4, 4); #endif } /* If we don't peek the incoming message... */ if ((flags & MSG_PEEK)==0) { /* 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 ((sock->conn->type == NETCONN_TCP) && (buflen - copylen > 0)) { sock->lastdata = buf; sock->lastoffset += copylen; #ifdef KLH_TD10887_DEBUG debug(7, 5, 5, 5, 5); #endif LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom: lastdata now netbuf=%p\n", (void*)buf)); } else { sock->lastdata = NULL; sock->lastoffset = 0; #ifdef KLH_TD10887_DEBUG debug(8, 6, 6, 6, 6); #endif LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom: deleting netbuf=%p\n", (void*)buf)); netbuf_delete(buf); } } else { done = 1; #ifdef KLH_TD10887_DEBUG debug(9, 7, 7, 7, 7); #endif } } while (!done); /* Check to see from where the data was.*/ if (from && fromlen) { struct sockaddr_in sin; if (netconn_type(sock->conn) == NETCONN_TCP) { addr = (struct ip_addr*)&(sin.sin_addr.s_addr); netconn_getaddr(sock->conn, addr, &port, 0); } else { 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); SMEMCPY(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, off)); } else { #if SOCKETS_DEBUG struct sockaddr_in sin; if (netconn_type(sock->conn) == NETCONN_TCP) { addr = (struct ip_addr*)&(sin.sin_addr.s_addr); netconn_getaddr(sock->conn, addr, &port, 0); } else { 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, off)); #endif /* SOCKETS_DEBUG */ } sock_set_errno(sock, 0); #ifdef KLH_TD10887_DEBUG debug(10, 8, 8, off, 8); #endif return off; } 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, const void *data, int size, unsigned int flags) { struct lwip_socket *sock; 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) return -1; if (sock->conn->type!=NETCONN_TCP) { #if (LWIP_UDP || LWIP_RAW) return lwip_sendto(s, data, size, flags, NULL, 0); #else sock_set_errno(sock, err_to_errno(ERR_ARG)); return -1; #endif /* (LWIP_UDP || LWIP_RAW) */ } err = netconn_write(sock->conn, data, size, NETCONN_COPY | ((flags & MSG_MORE)?NETCONN_MORE:0)); LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_send(%d) err=%d size=%d\n", s, err, size)); sock_set_errno(sock, err_to_errno(err)); return (err==ERR_OK?size:-1); } int lwip_sendto(int s, const void *data, int size, unsigned int flags, struct sockaddr *to, socklen_t tolen) { struct lwip_socket *sock; struct ip_addr remote_addr; int err; #if !LWIP_TCPIP_CORE_LOCKING struct netbuf buf; u16_t remote_port; #endif sock = get_socket(s); if (!sock) return -1; if (sock->conn->type==NETCONN_TCP) { #if LWIP_TCP return lwip_send(s, data, size, flags); #else sock_set_errno(sock, err_to_errno(ERR_ARG)); return -1; #endif /* LWIP_TCP */ } LWIP_ASSERT("lwip_sendto: size must fit in u16_t", ((size >= 0) && (size <= 0xffff))); LWIP_ERROR("lwip_sendto: invalid address", (((to == NULL) && (tolen == 0)) || ((tolen == sizeof(struct sockaddr_in)) && ((((struct sockaddr_in *)to)->sin_family) == AF_INET))), sock_set_errno(sock, err_to_errno(ERR_ARG)); return -1;); #if LWIP_TCPIP_CORE_LOCKING /* Should only be consider like a sample or a simple way to experiment this option (no check of "to" field...) */ { struct pbuf* p; p = pbuf_alloc(PBUF_TRANSPORT, 0, PBUF_REF); if (p == NULL) { err = ERR_MEM; } else { p->payload = (void*)data; p->len = p->tot_len = size; remote_addr.addr = ((struct sockaddr_in *)to)->sin_addr.s_addr; LOCK_TCPIP_CORE(); if (sock->conn->type==NETCONN_RAW) { err = sock->conn->err = raw_sendto(sock->conn->pcb.raw, p, &remote_addr); } else { err = sock->conn->err = udp_sendto(sock->conn->pcb.udp, p, &remote_addr, ntohs(((struct sockaddr_in *)to)->sin_port)); } UNLOCK_TCPIP_CORE(); pbuf_free(p); } } #else /* initialize a buffer */ buf.p = buf.ptr = NULL; if (to) { remote_addr.addr = ((struct sockaddr_in *)to)->sin_addr.s_addr; remote_port = ntohs(((struct sockaddr_in *)to)->sin_port); buf.addr = &remote_addr; buf.port = remote_port; } else { remote_addr.addr = 0; remote_port = 0; buf.addr = NULL; buf.port = 0; } 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", remote_port)); /* make the buffer point to the data that should be sent */ if ((err = netbuf_ref(&buf, data, size)) == ERR_OK) { /* send the data */ err = netconn_send(sock->conn, &buf); } /* deallocated the buffer */ if (buf.p != NULL) { pbuf_free(buf.p); } #endif /* LWIP_TCPIP_CORE_LOCKING */ sock_set_errno(sock, err_to_errno(err)); return (err==ERR_OK?size:-1); } int lwip_socket(int domain, int type, int protocol) { struct netconn *conn; int i; LWIP_UNUSED_ARG(domain); /* create a netconn */ switch (type) { case SOCK_RAW: conn = netconn_new_with_proto_and_callback(NETCONN_RAW, (u8_t)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( (protocol == IPPROTO_UDPLITE) ? NETCONN_UDPLITE : 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(ENFILE); return -1; } conn->socket = i; LWIP_DEBUGF(SOCKETS_DEBUG, ("%d\n", i)); set_errno(0); return i; } int lwip_write(int s, const void *data, int size) { return lwip_send(s, data, size, 0); } /** * Go through the readset and writeset lists and see which socket of the sockets * set in the sets has events. On return, readset, writeset and exceptset have * the sockets enabled that had events. * * exceptset is not used for now!!! * * @param maxfdp1 the highest socket index in the sets * @param readset in: set of sockets to check for read events; * out: set of sockets that had read events * @param writeset in: set of sockets to check for write events; * out: set of sockets that had write events * @param exceptset not yet implemented * @return number of sockets that had events (read+write) */ 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; } /** * Processing exceptset is not yet implemented. */ 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 */ 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)); if(msectimeout == 0) msectimeout = 1; } 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; } /** * Callback registered in the netconn layer for each socket-netconn. * Processes recvevent (data available) and wakes up tasks waiting for select. */ 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; LWIP_UNUSED_ARG(len); /* 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. */ sys_sem_wait(socksem); if (conn->socket < 0) { if (evt == NETCONN_EVT_RCVPLUS) { conn->socket--; } sys_sem_signal(socksem); return; } sys_sem_signal(socksem); } sock = get_socket(s); if (!sock) { return; } } else { return; } 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; default: LWIP_ASSERT("unknown event", 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; } } } /** * Unimplemented: Close one end of a full-duplex connection. * Currently, the full connection is closed. */ int lwip_shutdown(int s, int how) { LWIP_UNUSED_ARG(how); LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_shutdown(%d, how=%d)\n", s, how)); return lwip_close(s); /* XXX temporary hack until proper implementation */ } static int lwip_getaddrname(int s, struct sockaddr *name, socklen_t *namelen, u8_t local) { struct lwip_socket *sock; struct sockaddr_in sin; struct ip_addr naddr; sock = get_socket(s); if (!sock) return -1; memset(&sin, 0, sizeof(sin)); sin.sin_len = sizeof(sin); sin.sin_family = AF_INET; /* get the IP address and port */ netconn_getaddr(sock->conn, &naddr, &sin.sin_port, local); LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getaddrname(%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); SMEMCPY(name, &sin, *namelen); sock_set_errno(sock, 0); return 0; } int lwip_getpeername(int s, struct sockaddr *name, socklen_t *namelen) { return lwip_getaddrname(s, name, namelen, 0); } int lwip_getsockname(int s, struct sockaddr *name, socklen_t *namelen) { return lwip_getaddrname(s, name, namelen, 1); } int lwip_getsockopt(int s, int level, int optname, void *optval, socklen_t *optlen) { err_t err = ERR_OK; struct lwip_socket *sock = get_socket(s); struct lwip_setgetsockopt_data data; if (!sock) 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_CONTIMEO: */ /* UNIMPL case SO_SNDTIMEO: */ #if LWIP_SO_RCVTIMEO case SO_RCVTIMEO: #endif /* LWIP_SO_RCVTIMEO */ #if LWIP_SO_RCVBUF case SO_RCVBUF: #endif /* LWIP_SO_RCVBUF */ /* UNIMPL case SO_OOBINLINE: */ /* 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; case SO_NO_CHECK: if (*optlen < sizeof(int)) { err = EINVAL; } #if LWIP_UDP if ((sock->conn->type != NETCONN_UDP) || ((udp_flags(sock->conn->pcb.udp) & UDP_FLAGS_UDPLITE) != 0)) { /* this flag is only available for UDP, not for UDP lite */ err = EAFNOSUPPORT; } #endif /* LWIP_UDP */ break; default: LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, SOL_SOCKET, UNIMPL: optname=0x%x, ..)\n", s, optname)); err = ENOPROTOOPT; } /* switch (optname) */ 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; #if LWIP_IGMP case IP_MULTICAST_TTL: if (*optlen < sizeof(u8_t)) { err = EINVAL; } break; case IP_MULTICAST_IF: if (*optlen < sizeof(struct in_addr)) { err = EINVAL; } break; #endif /* LWIP_IGMP */ default: LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, UNIMPL: optname=0x%x, ..)\n", s, optname)); err = ENOPROTOOPT; } /* switch (optname) */ break; #if LWIP_TCP /* 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: #if LWIP_TCP_KEEPALIVE case TCP_KEEPIDLE: case TCP_KEEPINTVL: case TCP_KEEPCNT: #endif /* LWIP_TCP_KEEPALIVE */ break; default: LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_TCP, UNIMPL: optname=0x%x, ..)\n", s, optname)); err = ENOPROTOOPT; } /* switch (optname) */ break; #endif /* LWIP_TCP */ #if LWIP_UDP && LWIP_UDPLITE /* Level: IPPROTO_UDPLITE */ case IPPROTO_UDPLITE: if (*optlen < sizeof(int)) { err = EINVAL; break; } /* If this is no UDP lite socket, ignore any options. */ if (sock->conn->type != NETCONN_UDPLITE) return 0; switch (optname) { case UDPLITE_SEND_CSCOV: case UDPLITE_RECV_CSCOV: break; default: LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_UDPLITE, UNIMPL: optname=0x%x, ..)\n", s, optname)); err = ENOPROTOOPT; } /* switch (optname) */ break; #endif /* LWIP_UDP && LWIP_UDPLITE*/ /* 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 (err != ERR_OK) { sock_set_errno(sock, err); return -1; } /* Now do the actual option processing */ data.sock = sock; data.level = level; data.optname = optname; data.optval = optval; data.optlen = optlen; data.err = err; tcpip_callback(lwip_getsockopt_internal, &data); sys_arch_sem_wait(sock->conn->op_completed, 0); /* maybe lwip_getsockopt_internal has changed err */ err = data.err; sock_set_errno(sock, err); return err ? -1 : 0; } static void lwip_getsockopt_internal(void *arg) { struct lwip_socket *sock; #ifdef LWIP_DEBUG int s; #endif /* LWIP_DEBUG */ int level, optname; void *optval; struct lwip_setgetsockopt_data *data; LWIP_ASSERT("arg != NULL", arg != NULL); data = (struct lwip_setgetsockopt_data*)arg; sock = data->sock; #ifdef LWIP_DEBUG s = data->s; #endif /* LWIP_DEBUG */ level = data->level; optname = data->optname; optval = data->optval; 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.ip->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 (NETCONNTYPE_GROUP(sock->conn->type)) { case NETCONN_RAW: *(int*)optval = SOCK_RAW; break; case NETCONN_TCP: *(int*)optval = SOCK_STREAM; break; case NETCONN_UDP: *(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 (sock->conn->type) */ LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, SOL_SOCKET, SO_TYPE) = %d\n", s, *(int *)optval)); break; case SO_ERROR: if (sock->err == 0) { sock_set_errno(sock, err_to_errno(sock->conn->err)); } *(int *)optval = sock->err; sock->err = 0; LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, SOL_SOCKET, SO_ERROR) = %d\n", s, *(int *)optval)); break; #if LWIP_SO_RCVTIMEO case SO_RCVTIMEO: *(int *)optval = sock->conn->recv_timeout; break; #endif /* LWIP_SO_RCVTIMEO */ #if LWIP_SO_RCVBUF case SO_RCVBUF: *(int *)optval = sock->conn->recv_bufsize; break; #endif /* LWIP_SO_RCVBUF */ #if LWIP_UDP case SO_NO_CHECK: *(int*)optval = (udp_flags(sock->conn->pcb.udp) & UDP_FLAGS_NOCHKSUM) ? 1 : 0; break; #endif /* LWIP_UDP*/ } /* switch (optname) */ break; /* Level: IPPROTO_IP */ case IPPROTO_IP: switch (optname) { case IP_TTL: *(int*)optval = sock->conn->pcb.ip->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.ip->tos; LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, IP_TOS) = %d\n", s, *(int *)optval)); break; #if LWIP_IGMP case IP_MULTICAST_TTL: *(u8_t*)optval = sock->conn->pcb.ip->ttl; LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, IP_MULTICAST_TTL) = %d\n", s, *(int *)optval)); break; case IP_MULTICAST_IF: ((struct in_addr*) optval)->s_addr = sock->conn->pcb.udp->multicast_ip.addr; LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, IP_MULTICAST_IF) = 0x%x\n", s, *(u32_t *)optval)); break; #endif /* LWIP_IGMP */ } /* switch (optname) */ break; #if LWIP_TCP /* 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->keep_idle; LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, TCP_KEEPALIVE) = %d\n", s, *(int *)optval)); break; #if LWIP_TCP_KEEPALIVE case TCP_KEEPIDLE: *(int*)optval = (int)(sock->conn->pcb.tcp->keep_idle/1000); LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, TCP_KEEPIDLE) = %d\n", s, *(int *)optval)); break; case TCP_KEEPINTVL: *(int*)optval = (int)(sock->conn->pcb.tcp->keep_intvl/1000); LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, TCP_KEEPINTVL) = %d\n", s, *(int *)optval)); break; case TCP_KEEPCNT: *(int*)optval = (int)sock->conn->pcb.tcp->keep_cnt; LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, TCP_KEEPCNT) = %d\n", s, *(int *)optval)); break; #endif /* LWIP_TCP_KEEPALIVE */ } /* switch (optname) */ break; #endif /* LWIP_TCP */ #if LWIP_UDP && LWIP_UDPLITE /* Level: IPPROTO_UDPLITE */ case IPPROTO_UDPLITE: switch (optname) { case UDPLITE_SEND_CSCOV: *(int*)optval = sock->conn->pcb.udp->chksum_len_tx; LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_UDPLITE, UDPLITE_SEND_CSCOV) = %d\n", s, (*(int*)optval)) ); break; case UDPLITE_RECV_CSCOV: *(int*)optval = sock->conn->pcb.udp->chksum_len_rx; LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_UDPLITE, UDPLITE_RECV_CSCOV) = %d\n", s, (*(int*)optval)) ); break; } /* switch (optname) */ break; #endif /* LWIP_UDP */ } /* switch (level) */ sys_sem_signal(sock->conn->op_completed); } int lwip_setsockopt(int s, int level, int optname, const void *optval, socklen_t optlen) { struct lwip_socket *sock = get_socket(s); int err = ERR_OK; struct lwip_setgetsockopt_data data; if (!sock) 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 case SO_CONTIMEO: */ /* UNIMPL case case SO_SNDTIMEO: */ #if LWIP_SO_RCVTIMEO case SO_RCVTIMEO: #endif /* LWIP_SO_RCVTIMEO */ #if LWIP_SO_RCVBUF case SO_RCVBUF: #endif /* LWIP_SO_RCVBUF */ /* UNIMPL case SO_OOBINLINE: */ /* 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; case SO_NO_CHECK: if (optlen < sizeof(int)) { err = EINVAL; } #if LWIP_UDP if ((sock->conn->type != NETCONN_UDP) || ((udp_flags(sock->conn->pcb.udp) & UDP_FLAGS_UDPLITE) != 0)) { /* this flag is only available for UDP, not for UDP lite */ err = EAFNOSUPPORT; } #endif /* LWIP_UDP */ break; default: LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, SOL_SOCKET, UNIMPL: optname=0x%x, ..)\n", s, optname)); err = ENOPROTOOPT; } /* switch (optname) */ 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; #if LWIP_IGMP case IP_MULTICAST_TTL: if (optlen < sizeof(u8_t)) { err = EINVAL; } if (NETCONNTYPE_GROUP(sock->conn->type) != NETCONN_UDP) { err = EAFNOSUPPORT; } break; case IP_MULTICAST_IF: if (optlen < sizeof(struct in_addr)) { err = EINVAL; } if (NETCONNTYPE_GROUP(sock->conn->type) != NETCONN_UDP) { err = EAFNOSUPPORT; } break; case IP_ADD_MEMBERSHIP: case IP_DROP_MEMBERSHIP: if (optlen < sizeof(struct ip_mreq)) { err = EINVAL; } if (NETCONNTYPE_GROUP(sock->conn->type) != NETCONN_UDP) { err = EAFNOSUPPORT; } break; #endif /* LWIP_IGMP */ default: LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_IP, UNIMPL: optname=0x%x, ..)\n", s, optname)); err = ENOPROTOOPT; } /* switch (optname) */ break; #if LWIP_TCP /* 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: #if LWIP_TCP_KEEPALIVE case TCP_KEEPIDLE: case TCP_KEEPINTVL: case TCP_KEEPCNT: #endif /* LWIP_TCP_KEEPALIVE */ break; default: LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, UNIMPL: optname=0x%x, ..)\n", s, optname)); err = ENOPROTOOPT; } /* switch (optname) */ break; #endif /* LWIP_TCP */ #if LWIP_UDP && LWIP_UDPLITE /* Level: IPPROTO_UDPLITE */ case IPPROTO_UDPLITE: if (optlen < sizeof(int)) { err = EINVAL; break; } /* If this is no UDP lite socket, ignore any options. */ if (sock->conn->type != NETCONN_UDPLITE) return 0; switch (optname) { case UDPLITE_SEND_CSCOV: case UDPLITE_RECV_CSCOV: break; default: LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_UDPLITE, UNIMPL: optname=0x%x, ..)\n", s, optname)); err = ENOPROTOOPT; } /* switch (optname) */ break; #endif /* LWIP_UDP && LWIP_UDPLITE */ /* UNDEFINED LEVEL */ default: LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, level=0x%x, UNIMPL: optname=0x%x, ..)\n", s, level, optname)); err = ENOPROTOOPT; } /* switch (level) */ if (err != ERR_OK) { sock_set_errno(sock, err); return -1; } /* Now do the actual option processing */ data.sock = sock; data.level = level; data.optname = optname; data.optval = (void*)optval; data.optlen = &optlen; data.err = err; tcpip_callback(lwip_setsockopt_internal, &data); sys_arch_sem_wait(sock->conn->op_completed, 0); /* maybe lwip_setsockopt_internal has changed err */ err = data.err; sock_set_errno(sock, err); return err ? -1 : 0; } static void lwip_setsockopt_internal(void *arg) { struct lwip_socket *sock; #ifdef LWIP_DEBUG int s; #endif /* LWIP_DEBUG */ int level, optname; const void *optval; struct lwip_setgetsockopt_data *data; LWIP_ASSERT("arg != NULL", arg != NULL); data = (struct lwip_setgetsockopt_data*)arg; sock = data->sock; #ifdef LWIP_DEBUG s = data->s; #endif /* LWIP_DEBUG */ level = data->level; optname = data->optname; optval = data->optval; 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.ip->so_options |= optname; } else { sock->conn->pcb.ip->so_options &= ~optname; } LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, SOL_SOCKET, optname=0x%x, ..) -> %s\n", s, optname, (*(int*)optval?"on":"off"))); break; #if LWIP_SO_RCVTIMEO case SO_RCVTIMEO: sock->conn->recv_timeout = ( *(int*)optval ); break; #endif /* LWIP_SO_RCVTIMEO */ #if LWIP_SO_RCVBUF case SO_RCVBUF: sock->conn->recv_bufsize = ( *(int*)optval ); break; #endif /* LWIP_SO_RCVBUF */ #if LWIP_UDP case SO_NO_CHECK: if (*(int*)optval) { udp_setflags(sock->conn->pcb.udp, udp_flags(sock->conn->pcb.udp) | UDP_FLAGS_NOCHKSUM); } else { udp_setflags(sock->conn->pcb.udp, udp_flags(sock->conn->pcb.udp) & ~UDP_FLAGS_NOCHKSUM); } break; #endif /* LWIP_UDP */ } /* switch (optname) */ break; /* Level: IPPROTO_IP */ case IPPROTO_IP: switch (optname) { case IP_TTL: sock->conn->pcb.ip->ttl = (u8_t)(*(int*)optval); LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_IP, IP_TTL, ..) -> %u\n", s, sock->conn->pcb.ip->ttl)); break; case IP_TOS: sock->conn->pcb.ip->tos = (u8_t)(*(int*)optval); LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_IP, IP_TOS, ..)-> %u\n", s, sock->conn->pcb.ip->tos)); break; #if LWIP_IGMP case IP_MULTICAST_TTL: sock->conn->pcb.udp->ttl = (u8_t)(*(u8_t*)optval); break; case IP_MULTICAST_IF: sock->conn->pcb.udp->multicast_ip.addr = ((struct in_addr*) optval)->s_addr; break; case IP_ADD_MEMBERSHIP: case IP_DROP_MEMBERSHIP: { /* If this is a TCP or a RAW socket, ignore these options. */ struct ip_mreq *imr = (struct ip_mreq *)optval; if(optname == IP_ADD_MEMBERSHIP){ data->err = igmp_joingroup((struct ip_addr*)&(imr->imr_interface.s_addr), (struct ip_addr*)&(imr->imr_multiaddr.s_addr)); } else { data->err = igmp_leavegroup((struct ip_addr*)&(imr->imr_interface.s_addr), (struct ip_addr*)&(imr->imr_multiaddr.s_addr)); } if(data->err != ERR_OK) { data->err = EADDRNOTAVAIL; } } break; #endif /* LWIP_IGMP */ } /* switch (optname) */ break; #if LWIP_TCP /* 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->keep_idle = (u32_t)(*(int*)optval); LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, TCP_KEEPALIVE) -> %lu\n", s, sock->conn->pcb.tcp->keep_idle)); break; #if LWIP_TCP_KEEPALIVE case TCP_KEEPIDLE: sock->conn->pcb.tcp->keep_idle = 1000*(u32_t)(*(int*)optval); LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, TCP_KEEPIDLE) -> %lu\n", s, sock->conn->pcb.tcp->keep_idle)); break; case TCP_KEEPINTVL: sock->conn->pcb.tcp->keep_intvl = 1000*(u32_t)(*(int*)optval); LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, TCP_KEEPINTVL) -> %lu\n", s, sock->conn->pcb.tcp->keep_intvl)); break; case TCP_KEEPCNT: sock->conn->pcb.tcp->keep_cnt = (u32_t)(*(int*)optval); LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, TCP_KEEPCNT) -> %lu\n", s, sock->conn->pcb.tcp->keep_cnt)); break; #endif /* LWIP_TCP_KEEPALIVE */ } /* switch (optname) */ break; #endif /* LWIP_TCP*/ #if LWIP_UDP && LWIP_UDPLITE /* Level: IPPROTO_UDPLITE */ case IPPROTO_UDPLITE: switch (optname) { case UDPLITE_SEND_CSCOV: if ((*(int*)optval != 0) && (*(int*)optval < 8)) { /* don't allow illegal values! */ sock->conn->pcb.udp->chksum_len_tx = 8; } else { sock->conn->pcb.udp->chksum_len_tx = *(int*)optval; } LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_UDPLITE, UDPLITE_SEND_CSCOV) -> %d\n", s, (*(int*)optval)) ); break; case UDPLITE_RECV_CSCOV: if ((*(int*)optval != 0) && (*(int*)optval < 8)) { /* don't allow illegal values! */ sock->conn->pcb.udp->chksum_len_rx = 8; } else { sock->conn->pcb.udp->chksum_len_rx = *(int*)optval; } LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_UDPLITE, UDPLITE_RECV_CSCOV) -> %d\n", s, (*(int*)optval)) ); break; } /* switch (optname) */ break; #endif /* LWIP_UDP */ } /* switch (level) */ sys_sem_signal(sock->conn->op_completed); } int lwip_ioctl(int s, long cmd, void *argp) { struct lwip_socket *sock = get_socket(s); u16_t buflen = 0; if (!sock) return -1; switch (cmd) { case FIONREAD: if (!argp) { sock_set_errno(sock, EINVAL); return -1; } SYS_ARCH_GET(sock->conn->recv_avail, *((u16_t*)argp)); /* Check if there is data left from the last recv operation. /maq 041215 */ if (sock->lastdata) { buflen = netbuf_len(sock->lastdata); buflen -= sock->lastoffset; *((u16_t*)argp) += buflen; } 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; } /* switch (cmd) */ } int lwip_get_errno(int s) { struct lwip_socket *sock = get_socket(s); if (!sock) return EBADF; return sock->err; } #endif /* LWIP_SOCKET */