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minix/lib/liblwip/api/sockets.c
Ambarisha B 7e55dbac33 LIBLWIP - updated to LwIP trunk 
commit a4a41b9023ef5b3a7c4a1cd82fb167fc63e706df
Author: goldsimon <goldsimon@gmx.de>
Date:   Wed Sep 26 21:50:42 2012 +0200

- This also brings in LwIP's IPv6 codebase

Signed-off-by: Tomas Hruby <tom@minix3.org>
2013-03-25 16:51:24 +01:00

2555 lines
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/**
* @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 <adam@sics.se>
*
* Improved by Marc Boucher <marc@mbsi.ca> and David Haas <dhaas@alum.rpi.edu>
*
*/
#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 "lwip/pbuf.h"
#if LWIP_CHECKSUM_ON_COPY
#include "lwip/inet_chksum.h"
#endif
#include <string.h>
#define IP4ADDR_PORT_TO_SOCKADDR(sin, ipXaddr, port) do { \
(sin)->sin_len = sizeof(struct sockaddr_in); \
(sin)->sin_family = AF_INET; \
(sin)->sin_port = htons((port)); \
inet_addr_from_ipaddr(&(sin)->sin_addr, ipX_2_ip(ipXaddr)); \
memset((sin)->sin_zero, 0, SIN_ZERO_LEN); }while(0)
#define SOCKADDR4_TO_IP4ADDR_PORT(sin, ipXaddr, port) do { \
inet_addr_to_ipaddr(ipX_2_ip(ipXaddr), &((sin)->sin_addr)); \
(port) = ntohs((sin)->sin_port); }while(0)
#if LWIP_IPV6
#define IS_SOCK_ADDR_LEN_VALID(namelen) (((namelen) == sizeof(struct sockaddr_in)) || \
((namelen) == sizeof(struct sockaddr_in6)))
#define IS_SOCK_ADDR_TYPE_VALID(name) (((name)->sa_family == AF_INET) || \
((name)->sa_family == AF_INET6))
#define SOCK_ADDR_TYPE_MATCH(name, sock) \
((((name)->sa_family == AF_INET) && !(NETCONNTYPE_ISIPV6((sock)->conn->type))) || \
(((name)->sa_family == AF_INET6) && (NETCONNTYPE_ISIPV6((sock)->conn->type))))
#define IP6ADDR_PORT_TO_SOCKADDR(sin6, ipXaddr, port) do { \
(sin6)->sin6_len = sizeof(struct sockaddr_in6); \
(sin6)->sin6_family = AF_INET6; \
(sin6)->sin6_port = htons((port)); \
(sin6)->sin6_flowinfo = 0; \
inet6_addr_from_ip6addr(&(sin6)->sin6_addr, ipX_2_ip6(ipXaddr)); }while(0)
#define IPXADDR_PORT_TO_SOCKADDR(isipv6, sockaddr, ipXaddr, port) do { \
if (isipv6) { \
IP6ADDR_PORT_TO_SOCKADDR((struct sockaddr_in6*)(void*)(sockaddr), ipXaddr, port); \
} else { \
IP4ADDR_PORT_TO_SOCKADDR((struct sockaddr_in*)(void*)(sockaddr), ipXaddr, port); \
} } while(0)
#define SOCKADDR6_TO_IP6ADDR_PORT(sin6, ipXaddr, port) do { \
inet6_addr_to_ip6addr(ipX_2_ip6(ipXaddr), &((sin6)->sin6_addr)); \
(port) = ntohs((sin6)->sin6_port); }while(0)
#define SOCKADDR_TO_IPXADDR_PORT(isipv6, sockaddr, ipXaddr, port) do { \
if (isipv6) { \
SOCKADDR6_TO_IP6ADDR_PORT((struct sockaddr_in6*)(void*)(sockaddr), ipXaddr, port); \
} else { \
SOCKADDR4_TO_IP4ADDR_PORT((struct sockaddr_in*)(void*)(sockaddr), ipXaddr, port); \
} } while(0)
#define DOMAIN_TO_NETCONN_TYPE(domain, type) (((domain) == AF_INET) ? \
(type) : (enum netconn_type)((type) | NETCONN_TYPE_IPV6))
#else /* LWIP_IPV6 */
#define IS_SOCK_ADDR_LEN_VALID(namelen) ((namelen) == sizeof(struct sockaddr_in))
#define IS_SOCK_ADDR_TYPE_VALID(name) ((name)->sa_family == AF_INET)
#define SOCK_ADDR_TYPE_MATCH(name, sock) 1
#define IPXADDR_PORT_TO_SOCKADDR(isipv6, sockaddr, ipXaddr, port) \
IP4ADDR_PORT_TO_SOCKADDR((struct sockaddr_in*)(void*)(sockaddr), ipXaddr, port)
#define SOCKADDR_TO_IPXADDR_PORT(isipv6, sockaddr, ipXaddr, port) \
SOCKADDR4_TO_IP4ADDR_PORT((struct sockaddr_in*)(void*)(sockaddr), ipXaddr, port)
#define DOMAIN_TO_NETCONN_TYPE(domain, netconn_type) (netconn_type)
#endif /* LWIP_IPV6 */
#define IS_SOCK_ADDR_TYPE_VALID_OR_UNSPEC(name) (((name)->sa_family == AF_UNSPEC) || \
IS_SOCK_ADDR_TYPE_VALID(name))
#define SOCK_ADDR_TYPE_MATCH_OR_UNSPEC(name, sock) (((name)->sa_family == AF_UNSPEC) || \
SOCK_ADDR_TYPE_MATCH(name, sock))
#define IS_SOCK_ADDR_ALIGNED(name) ((((mem_ptr_t)(name)) % 4) == 0)
#define NUM_SOCKETS MEMP_NUM_NETCONN
/** Contains all internal pointers and states used for a socket */
struct lwip_sock {
/** sockets currently are built on netconns, each socket has one netconn */
struct netconn *conn;
/** data that was left from the previous read */
void *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 */
s16_t rcvevent;
/** number of times data was ACKed (free send buffer), set by event_callback(),
tested by select */
u16_t sendevent;
/** error happened for this socket, set by event_callback(), tested by select */
u16_t errevent;
/** last error that occurred on this socket */
int err;
/** counter of how many threads are waiting for this socket using select */
int select_waiting;
};
/** Description for a task waiting in select */
struct lwip_select_cb {
/** Pointer to the next waiting task */
struct lwip_select_cb *next;
/** Pointer to the previous waiting task */
struct lwip_select_cb *prev;
/** 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_sock *sock;
#ifdef LWIP_DEBUG
/** socket index for which to change options */
int s;
#endif /* LWIP_DEBUG */
/** 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;
};
/** A struct sockaddr replacement that has the same alignment as sockaddr_in/
* sockaddr_in6 if instantiated.
*/
union sockaddr_aligned {
struct sockaddr sa;
#if LWIP_IPV6
struct sockaddr_in6 sin6;
#endif /* LWIP_IPV6 */
struct sockaddr_in sin;
};
/** The global array of available sockets */
static struct lwip_sock sockets[NUM_SOCKETS];
/** The global list of tasks waiting for select */
static struct lwip_select_cb *select_cb_list;
/** This counter is increased from lwip_select when the list is chagned
and checked in event_callback to see if it has changed. */
static volatile int select_cb_ctr;
/** 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. */
EWOULDBLOCK, /* ERR_TIMEOUT -3 Timeout */
EHOSTUNREACH, /* ERR_RTE -4 Routing problem. */
EINPROGRESS, /* ERR_INPROGRESS -5 Operation in progress */
EINVAL, /* ERR_VAL -6 Illegal value. */
EWOULDBLOCK, /* ERR_WOULDBLOCK -7 Operation would block. */
EADDRINUSE, /* ERR_USE -8 Address in use. */
EALREADY, /* ERR_ISCONN -9 Already connected. */
ECONNABORTED, /* ERR_ABRT -10 Connection aborted. */
ECONNRESET, /* ERR_RST -11 Connection reset. */
ENOTCONN, /* ERR_CLSD -12 Connection closed. */
ENOTCONN, /* ERR_CONN -13 Not connected. */
EIO, /* ERR_ARG -14 Illegal argument. */
-1, /* ERR_IF -15 Low-level netif error */
};
#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
#ifndef set_errno
#define set_errno(err) errno = (err)
#endif
#else /* ERRNO */
#define set_errno(err)
#endif /* ERRNO */
#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)
{
}
/**
* Map a externally used socket index to the internal socket representation.
*
* @param s externally used socket index
* @return struct lwip_sock for the socket or NULL if not found
*/
static struct lwip_sock *
get_socket(int s)
{
struct lwip_sock *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;
}
/**
* Same as get_socket but doesn't set errno
*
* @param s externally used socket index
* @return struct lwip_sock for the socket or NULL if not found
*/
static struct lwip_sock *
tryget_socket(int s)
{
if ((s < 0) || (s >= NUM_SOCKETS)) {
return NULL;
}
if (!sockets[s].conn) {
return NULL;
}
return &sockets[s];
}
/**
* Allocate a new socket for a given netconn.
*
* @param newconn the netconn for which to allocate a socket
* @param accepted 1 if socket has been created by accept(),
* 0 if socket has been created by socket()
* @return the index of the new socket; -1 on error
*/
static int
alloc_socket(struct netconn *newconn, int accepted)
{
int i;
SYS_ARCH_DECL_PROTECT(lev);
/* allocate a new socket identifier */
for (i = 0; i < NUM_SOCKETS; ++i) {
/* Protect socket array */
SYS_ARCH_PROTECT(lev);
if (!sockets[i].conn) {
sockets[i].conn = newconn;
/* The socket is not yet known to anyone, so no need to protect
after having marked it as used. */
SYS_ARCH_UNPROTECT(lev);
sockets[i].lastdata = NULL;
sockets[i].lastoffset = 0;
sockets[i].rcvevent = 0;
/* TCP sendbuf is empty, but the socket is not yet writable until connected
* (unless it has been created by accept()). */
sockets[i].sendevent = (NETCONNTYPE_GROUP(newconn->type) == NETCONN_TCP ? (accepted != 0) : 1);
sockets[i].errevent = 0;
sockets[i].err = 0;
sockets[i].select_waiting = 0;
return i;
}
SYS_ARCH_UNPROTECT(lev);
}
return -1;
}
/** Free a socket. The socket's netconn must have been
* delete before!
*
* @param sock the socket to free
* @param is_tcp != 0 for TCP sockets, used to free lastdata
*/
static void
free_socket(struct lwip_sock *sock, int is_tcp)
{
void *lastdata;
SYS_ARCH_DECL_PROTECT(lev);
lastdata = sock->lastdata;
sock->lastdata = NULL;
sock->lastoffset = 0;
sock->err = 0;
/* Protect socket array */
SYS_ARCH_PROTECT(lev);
sock->conn = NULL;
SYS_ARCH_UNPROTECT(lev);
/* don't use 'sock' after this line, as another task might have allocated it */
if (lastdata != NULL) {
if (is_tcp) {
pbuf_free((struct pbuf *)lastdata);
} else {
netbuf_delete((struct netbuf *)lastdata);
}
}
}
/* 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_sock *sock, *nsock;
struct netconn *newconn;
ipX_addr_t naddr;
u16_t port = 0;
int newsock;
err_t err;
SYS_ARCH_DECL_PROTECT(lev);
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_accept(%d)...\n", s));
sock = get_socket(s);
if (!sock) {
return -1;
}
if (netconn_is_nonblocking(sock->conn) && (sock->rcvevent <= 0)) {
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_accept(%d): returning EWOULDBLOCK\n", s));
sock_set_errno(sock, EWOULDBLOCK);
return -1;
}
/* wait for a new connection */
err = netconn_accept(sock->conn, &newconn);
if (err != ERR_OK) {
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_accept(%d): netconn_acept failed, err=%d\n", s, err));
if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_TCP) {
sock_set_errno(sock, EOPNOTSUPP);
return EOPNOTSUPP;
}
sock_set_errno(sock, err_to_errno(err));
return -1;
}
LWIP_ASSERT("newconn != NULL", newconn != NULL);
/* Prevent automatic window updates, we do this on our own! */
netconn_set_noautorecved(newconn, 1);
/* Note that POSIX only requires us to check addr is non-NULL. addrlen must
* not be NULL if addr is valid.
*/
if (addr != NULL) {
union sockaddr_aligned tempaddr;
/* get the IP address and port of the remote host */
err = netconn_peer(newconn, ipX_2_ip(&naddr), &port);
if (err != ERR_OK) {
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_accept(%d): netconn_peer failed, err=%d\n", s, err));
netconn_delete(newconn);
sock_set_errno(sock, err_to_errno(err));
return -1;
}
LWIP_ASSERT("addr valid but addrlen NULL", addrlen != NULL);
IPXADDR_PORT_TO_SOCKADDR(NETCONNTYPE_ISIPV6(newconn->type), &tempaddr, &naddr, port);
if (*addrlen > tempaddr.sa.sa_len) {
*addrlen = tempaddr.sa.sa_len;
}
MEMCPY(addr, &tempaddr, *addrlen);
}
newsock = alloc_socket(newconn, 1);
if (newsock == -1) {
netconn_delete(newconn);
sock_set_errno(sock, ENFILE);
return -1;
}
LWIP_ASSERT("invalid socket index", (newsock >= 0) && (newsock < NUM_SOCKETS));
LWIP_ASSERT("newconn->callback == event_callback", newconn->callback == event_callback);
nsock = &sockets[newsock];
/* 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!
*/
SYS_ARCH_PROTECT(lev);
nsock->rcvevent += (s16_t)(-1 - newconn->socket);
newconn->socket = newsock;
SYS_ARCH_UNPROTECT(lev);
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_accept(%d) returning new sock=%d", s, newsock));
if (addr != NULL) {
LWIP_DEBUGF(SOCKETS_DEBUG, (" addr="));
ipX_addr_debug_print(NETCONNTYPE_ISIPV6(newconn->type), SOCKETS_DEBUG, &naddr);
LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%"U16_F"\n", port));
}
sock_set_errno(sock, 0);
return newsock;
}
int
lwip_bind(int s, const struct sockaddr *name, socklen_t namelen)
{
struct lwip_sock *sock;
ipX_addr_t local_addr;
u16_t local_port;
err_t err;
sock = get_socket(s);
if (!sock) {
return -1;
}
if (!SOCK_ADDR_TYPE_MATCH(name, sock)) {
/* sockaddr does not match socket type (IPv4/IPv6) */
sock_set_errno(sock, err_to_errno(ERR_VAL));
return -1;
}
/* check size, familiy and alignment of 'name' */
LWIP_ERROR("lwip_bind: invalid address", (IS_SOCK_ADDR_LEN_VALID(namelen) &&
IS_SOCK_ADDR_TYPE_VALID(name) && IS_SOCK_ADDR_ALIGNED(name)),
sock_set_errno(sock, err_to_errno(ERR_ARG)); return -1;);
LWIP_UNUSED_ARG(namelen);
SOCKADDR_TO_IPXADDR_PORT((name->sa_family == AF_INET6), name, &local_addr, local_port);
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_bind(%d, addr=", s));
ipX_addr_debug_print(name->sa_family == AF_INET6, SOCKETS_DEBUG, &local_addr);
LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%"U16_F")\n", local_port));
err = netconn_bind(sock->conn, ipX_2_ip(&local_addr), 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_sock *sock;
int is_tcp = 0;
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_close(%d)\n", s));
sock = get_socket(s);
if (!sock) {
return -1;
}
if(sock->conn != NULL) {
is_tcp = NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_TCP;
} else {
LWIP_ASSERT("sock->lastdata == NULL", sock->lastdata == NULL);
}
netconn_delete(sock->conn);
free_socket(sock, is_tcp);
set_errno(0);
return 0;
}
int
lwip_connect(int s, const struct sockaddr *name, socklen_t namelen)
{
struct lwip_sock *sock;
err_t err;
sock = get_socket(s);
if (!sock) {
return -1;
}
if (!SOCK_ADDR_TYPE_MATCH_OR_UNSPEC(name, sock)) {
/* sockaddr does not match socket type (IPv4/IPv6) */
sock_set_errno(sock, err_to_errno(ERR_VAL));
return -1;
}
/* check size, familiy and alignment of 'name' */
LWIP_ERROR("lwip_connect: invalid address", IS_SOCK_ADDR_LEN_VALID(namelen) &&
IS_SOCK_ADDR_TYPE_VALID_OR_UNSPEC(name) && IS_SOCK_ADDR_ALIGNED(name),
sock_set_errno(sock, err_to_errno(ERR_ARG)); return -1;);
LWIP_UNUSED_ARG(namelen);
if (name->sa_family == AF_UNSPEC) {
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_connect(%d, AF_UNSPEC)\n", s));
err = netconn_disconnect(sock->conn);
} else {
ipX_addr_t remote_addr;
u16_t remote_port;
SOCKADDR_TO_IPXADDR_PORT((name->sa_family == AF_INET6), name, &remote_addr, remote_port);
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_connect(%d, addr=", s));
ipX_addr_debug_print(name->sa_family == AF_INET6, SOCKETS_DEBUG, &remote_addr);
LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%"U16_F")\n", remote_port));
err = netconn_connect(sock->conn, ipX_2_ip(&remote_addr), 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: needs TCP_LISTEN_BACKLOG=1)
* @return 0 on success, non-zero on failure
*/
int
lwip_listen(int s, int backlog)
{
struct lwip_sock *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 */
backlog = LWIP_MIN(LWIP_MAX(backlog, 0), 0xff);
err = netconn_listen_with_backlog(sock->conn, (u8_t)backlog);
if (err != ERR_OK) {
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_listen(%d) failed, err=%d\n", s, err));
if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_TCP) {
sock_set_errno(sock, EOPNOTSUPP);
return EOPNOTSUPP;
}
sock_set_errno(sock, err_to_errno(err));
return -1;
}
sock_set_errno(sock, 0);
return 0;
}
int
lwip_recvfrom(int s, void *mem, size_t len, int flags,
struct sockaddr *from, socklen_t *fromlen)
{
struct lwip_sock *sock;
void *buf = NULL;
struct pbuf *p;
u16_t buflen, copylen;
int off = 0;
u8_t done = 0;
err_t err;
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom(%d, %p, %"SZT_F", 0x%x, ..)\n", s, mem, len, flags));
sock = get_socket(s);
if (!sock) {
return -1;
}
do {
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom: top while sock->lastdata=%p\n", sock->lastdata));
/* 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) || netconn_is_nonblocking(sock->conn)) &&
(sock->rcvevent <= 0)) {
if (off > 0) {
/* update receive window */
netconn_recved(sock->conn, (u32_t)off);
/* already received data, return that */
sock_set_errno(sock, 0);
return off;
}
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. */
if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_TCP) {
err = netconn_recv_tcp_pbuf(sock->conn, (struct pbuf **)&buf);
} else {
err = netconn_recv(sock->conn, (struct netbuf **)&buf);
}
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom: netconn_recv err=%d, netbuf=%p\n",
err, buf));
if (err != ERR_OK) {
if (off > 0) {
/* update receive window */
netconn_recved(sock->conn, (u32_t)off);
/* already received data, return that */
sock_set_errno(sock, 0);
return off;
}
/* We should really do some error checking here. */
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom(%d): buf == NULL, error is \"%s\"!\n",
s, lwip_strerr(err)));
sock_set_errno(sock, err_to_errno(err));
if (err == ERR_CLSD) {
return 0;
} else {
return -1;
}
}
LWIP_ASSERT("buf != NULL", buf != NULL);
sock->lastdata = buf;
}
if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_TCP) {
p = (struct pbuf *)buf;
} else {
p = ((struct netbuf *)buf)->p;
}
buflen = p->tot_len;
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom: buflen=%"U16_F" len=%"SZT_F" off=%d sock->lastoffset=%"U16_F"\n",
buflen, len, off, sock->lastoffset));
buflen -= sock->lastoffset;
if (len > buflen) {
copylen = buflen;
} else {
copylen = (u16_t)len;
}
/* copy the contents of the received buffer into
the supplied memory pointer mem */
pbuf_copy_partial(p, (u8_t*)mem + off, copylen, sock->lastoffset);
off += copylen;
if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_TCP) {
LWIP_ASSERT("invalid copylen, len would underflow", len >= copylen);
len -= copylen;
if ( (len <= 0) ||
(p->flags & PBUF_FLAG_PUSH) ||
(sock->rcvevent <= 0) ||
((flags & MSG_PEEK)!=0)) {
done = 1;
}
} else {
done = 1;
}
/* Check to see from where the data was.*/
if (done) {
#if !SOCKETS_DEBUG
if (from && fromlen)
#endif /* !SOCKETS_DEBUG */
{
u16_t port;
ipX_addr_t tmpaddr;
ipX_addr_t *fromaddr;
union sockaddr_aligned saddr;
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom(%d): addr=", s));
if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_TCP) {
fromaddr = &tmpaddr;
/* @todo: this does not work for IPv6, yet */
netconn_getaddr(sock->conn, ipX_2_ip(fromaddr), &port, 0);
} else {
port = netbuf_fromport((struct netbuf *)buf);
fromaddr = netbuf_fromaddr_ipX((struct netbuf *)buf);
}
IPXADDR_PORT_TO_SOCKADDR(NETCONNTYPE_ISIPV6(netconn_type(sock->conn)),
&saddr, fromaddr, port);
ipX_addr_debug_print(NETCONNTYPE_ISIPV6(netconn_type(sock->conn)),
SOCKETS_DEBUG, fromaddr);
LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%"U16_F" len=%d\n", port, off));
#if SOCKETS_DEBUG
if (from && fromlen)
#endif /* SOCKETS_DEBUG */
{
if (*fromlen > saddr.sa.sa_len) {
*fromlen = saddr.sa.sa_len;
}
MEMCPY(from, &saddr, *fromlen);
}
}
}
/* 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 ((NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_TCP) && (buflen - copylen > 0)) {
sock->lastdata = buf;
sock->lastoffset += copylen;
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom: lastdata now netbuf=%p\n", buf));
} else {
sock->lastdata = NULL;
sock->lastoffset = 0;
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom: deleting netbuf=%p\n", buf));
if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_TCP) {
pbuf_free((struct pbuf *)buf);
} else {
netbuf_delete((struct netbuf *)buf);
}
}
}
} while (!done);
if ((off > 0) && (NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_TCP)) {
/* update receive window */
netconn_recved(sock->conn, (u32_t)off);
}
sock_set_errno(sock, 0);
return off;
}
int
lwip_read(int s, void *mem, size_t len)
{
return lwip_recvfrom(s, mem, len, 0, NULL, NULL);
}
int
lwip_recv(int s, void *mem, size_t len, int flags)
{
return lwip_recvfrom(s, mem, len, flags, NULL, NULL);
}
int
lwip_send(int s, const void *data, size_t size, int flags)
{
struct lwip_sock *sock;
err_t err;
u8_t write_flags;
size_t written;
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_send(%d, data=%p, size=%"SZT_F", flags=0x%x)\n",
s, data, size, flags));
sock = get_socket(s);
if (!sock) {
return -1;
}
if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_TCP) {
#if (LWIP_UDP || LWIP_RAW)
return lwip_sendto(s, data, size, flags, NULL, 0);
#else /* (LWIP_UDP || LWIP_RAW) */
sock_set_errno(sock, err_to_errno(ERR_ARG));
return -1;
#endif /* (LWIP_UDP || LWIP_RAW) */
}
write_flags = NETCONN_COPY |
((flags & MSG_MORE) ? NETCONN_MORE : 0) |
((flags & MSG_DONTWAIT) ? NETCONN_DONTBLOCK : 0);
written = 0;
err = netconn_write_partly(sock->conn, data, size, write_flags, &written);
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_send(%d) err=%d written=%"SZT_F"\n", s, err, written));
sock_set_errno(sock, err_to_errno(err));
return (err == ERR_OK ? (int)written : -1);
}
int
lwip_sendto(int s, const void *data, size_t size, int flags,
const struct sockaddr *to, socklen_t tolen)
{
struct lwip_sock *sock;
err_t err;
u16_t short_size;
u16_t remote_port;
#if !LWIP_TCPIP_CORE_LOCKING
struct netbuf buf;
#endif
sock = get_socket(s);
if (!sock) {
return -1;
}
if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_TCP) {
#if LWIP_TCP
return lwip_send(s, data, size, flags);
#else /* LWIP_TCP */
LWIP_UNUSED_ARG(flags);
sock_set_errno(sock, err_to_errno(ERR_ARG));
return -1;
#endif /* LWIP_TCP */
}
if ((to != NULL) && !SOCK_ADDR_TYPE_MATCH(to, sock)) {
/* sockaddr does not match socket type (IPv4/IPv6) */
sock_set_errno(sock, err_to_errno(ERR_VAL));
return -1;
}
/* @todo: split into multiple sendto's? */
LWIP_ASSERT("lwip_sendto: size must fit in u16_t", size <= 0xffff);
short_size = (u16_t)size;
LWIP_ERROR("lwip_sendto: invalid address", (((to == NULL) && (tolen == 0)) ||
(IS_SOCK_ADDR_LEN_VALID(tolen) &&
IS_SOCK_ADDR_TYPE_VALID(to) && IS_SOCK_ADDR_ALIGNED(to))),
sock_set_errno(sock, err_to_errno(ERR_ARG)); return -1;);
LWIP_UNUSED_ARG(tolen);
#if LWIP_TCPIP_CORE_LOCKING
/* Special speedup for fast UDP/RAW sending: call the raw API directly
instead of using the netconn functions. */
{
struct pbuf* p;
ipX_addr_t *remote_addr;
ipX_addr_t remote_addr_tmp;
#if LWIP_NETIF_TX_SINGLE_PBUF
p = pbuf_alloc(PBUF_TRANSPORT, short_size, PBUF_RAM);
if (p != NULL) {
#if LWIP_CHECKSUM_ON_COPY
u16_t chksum = 0;
if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_RAW) {
chksum = LWIP_CHKSUM_COPY(p->payload, data, short_size);
} else
#endif /* LWIP_CHECKSUM_ON_COPY */
MEMCPY(p->payload, data, size);
#else /* LWIP_NETIF_TX_SINGLE_PBUF */
p = pbuf_alloc(PBUF_TRANSPORT, short_size, PBUF_REF);
if (p != NULL) {
p->payload = (void*)data;
#endif /* LWIP_NETIF_TX_SINGLE_PBUF */
if (to != NULL) {
SOCKADDR_TO_IPXADDR_PORT(to->sa_family == AF_INET6,
to, &remote_addr_tmp, remote_port);
remote_addr = &remote_addr_tmp;
} else {
remote_addr = &sock->conn->pcb.ip->remote_ip;
#if LWIP_UDP
if (NETCONNTYPE_GROUP(sock->conn->type) == NETCONN_UDP) {
remote_port = sock->conn->pcb.udp->remote_port;
} else
#endif /* LWIP_UDP */
{
remote_port = 0;
}
}
LOCK_TCPIP_CORE();
if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_RAW) {
#if LWIP_RAW
err = sock->conn->last_err = raw_sendto(sock->conn->pcb.raw, p, ipX_2_ip(remote_addr));
#else /* LWIP_RAW */
err = ERR_ARG;
#endif /* LWIP_RAW */
}
#if LWIP_UDP && LWIP_RAW
else
#endif /* LWIP_UDP && LWIP_RAW */
{
#if LWIP_UDP
#if LWIP_CHECKSUM_ON_COPY && LWIP_NETIF_TX_SINGLE_PBUF
err = sock->conn->last_err = udp_sendto_chksum(sock->conn->pcb.udp, p,
ipX_2_ip(remote_addr), remote_port, 1, chksum);
#else /* LWIP_CHECKSUM_ON_COPY && LWIP_NETIF_TX_SINGLE_PBUF */
err = sock->conn->last_err = udp_sendto(sock->conn->pcb.udp, p,
ipX_2_ip(remote_addr), remote_port);
#endif /* LWIP_CHECKSUM_ON_COPY && LWIP_NETIF_TX_SINGLE_PBUF */
#else /* LWIP_UDP */
err = ERR_ARG;
#endif /* LWIP_UDP */
}
UNLOCK_TCPIP_CORE();
pbuf_free(p);
} else {
err = ERR_MEM;
}
}
#else /* LWIP_TCPIP_CORE_LOCKING */
/* initialize a buffer */
buf.p = buf.ptr = NULL;
#if LWIP_CHECKSUM_ON_COPY
buf.flags = 0;
#endif /* LWIP_CHECKSUM_ON_COPY */
if (to) {
SOCKADDR_TO_IPXADDR_PORT((to->sa_family) == AF_INET6, to, &buf.addr, remote_port);
} else {
remote_port = 0;
ipX_addr_set_any(NETCONNTYPE_ISIPV6(netconn_type(sock->conn)), &buf.addr);
}
netbuf_fromport(&buf) = remote_port;
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_sendto(%d, data=%p, short_size=%"U16_F", flags=0x%x to=",
s, data, short_size, flags));
ipX_addr_debug_print(NETCONNTYPE_ISIPV6(netconn_type(sock->conn)),
SOCKETS_DEBUG, &buf.addr);
LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%"U16_F"\n", remote_port));
/* make the buffer point to the data that should be sent */
#if LWIP_NETIF_TX_SINGLE_PBUF
/* Allocate a new netbuf and copy the data into it. */
if (netbuf_alloc(&buf, short_size) == NULL) {
err = ERR_MEM;
} else {
#if LWIP_CHECKSUM_ON_COPY
if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_RAW) {
u16_t chksum = LWIP_CHKSUM_COPY(buf.p->payload, data, short_size);
netbuf_set_chksum(&buf, chksum);
err = ERR_OK;
} else
#endif /* LWIP_CHECKSUM_ON_COPY */
{
err = netbuf_take(&buf, data, short_size);
}
}
#else /* LWIP_NETIF_TX_SINGLE_PBUF */
err = netbuf_ref(&buf, data, short_size);
#endif /* LWIP_NETIF_TX_SINGLE_PBUF */
if (err == ERR_OK) {
/* send the data */
err = netconn_send(sock->conn, &buf);
}
/* deallocated the buffer */
netbuf_free(&buf);
#endif /* LWIP_TCPIP_CORE_LOCKING */
sock_set_errno(sock, err_to_errno(err));
return (err == ERR_OK ? short_size : -1);
}
int
lwip_socket(int domain, int type, int protocol)
{
struct netconn *conn;
int i;
#if !LWIP_IPV6
LWIP_UNUSED_ARG(domain); /* @todo: check this */
#endif /* LWIP_IPV6 */
/* create a netconn */
switch (type) {
case SOCK_RAW:
conn = netconn_new_with_proto_and_callback(DOMAIN_TO_NETCONN_TYPE(domain, 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(DOMAIN_TO_NETCONN_TYPE(domain,
((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(DOMAIN_TO_NETCONN_TYPE(domain, NETCONN_TCP), event_callback);
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_socket(%s, SOCK_STREAM, %d) = ",
domain == PF_INET ? "PF_INET" : "UNKNOWN", protocol));
if (conn != NULL) {
/* Prevent automatic window updates, we do this on our own! */
netconn_set_noautorecved(conn, 1);
}
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, 0);
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, size_t 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
* @param writeset_in: set of sockets to check for write events
* @param exceptset_in: set of sockets to check for error events
* @param readset_out: set of sockets that had read events
* @param writeset_out: set of sockets that had write events
* @param exceptset_out: set os sockets that had error events
* @return number of sockets that had events (read/write/exception) (>= 0)
*/
static int
lwip_selscan(int maxfdp1, fd_set *readset_in, fd_set *writeset_in, fd_set *exceptset_in,
fd_set *readset_out, fd_set *writeset_out, fd_set *exceptset_out)
{
int i, nready = 0;
fd_set lreadset, lwriteset, lexceptset;
struct lwip_sock *sock;
SYS_ARCH_DECL_PROTECT(lev);
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++) {
void* lastdata = NULL;
s16_t rcvevent = 0;
u16_t sendevent = 0;
u16_t errevent = 0;
/* First get the socket's status (protected)... */
SYS_ARCH_PROTECT(lev);
sock = tryget_socket(i);
if (sock != NULL) {
lastdata = sock->lastdata;
rcvevent = sock->rcvevent;
sendevent = sock->sendevent;
errevent = sock->errevent;
}
SYS_ARCH_UNPROTECT(lev);
/* ... then examine it: */
/* See if netconn of this socket is ready for read */
if (readset_in && FD_ISSET(i, readset_in) && ((lastdata != NULL) || (rcvevent > 0))) {
FD_SET(i, &lreadset);
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_selscan: fd=%d ready for reading\n", i));
nready++;
}
/* See if netconn of this socket is ready for write */
if (writeset_in && FD_ISSET(i, writeset_in) && (sendevent != 0)) {
FD_SET(i, &lwriteset);
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_selscan: fd=%d ready for writing\n", i));
nready++;
}
/* See if netconn of this socket had an error */
if (exceptset_in && FD_ISSET(i, exceptset_in) && (errevent != 0)) {
FD_SET(i, &lexceptset);
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_selscan: fd=%d ready for exception\n", i));
nready++;
}
}
/* copy local sets to the ones provided as arguments */
*readset_out = lreadset;
*writeset_out = lwriteset;
*exceptset_out = lexceptset;
LWIP_ASSERT("nready >= 0", nready >= 0);
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)
{
u32_t waitres = 0;
int nready;
fd_set lreadset, lwriteset, lexceptset;
u32_t msectimeout;
struct lwip_select_cb select_cb;
err_t err;
int i;
SYS_ARCH_DECL_PROTECT(lev);
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_select(%d, %p, %p, %p, tvsec=%"S32_F" tvusec=%"S32_F")\n",
maxfdp1, (void *)readset, (void *) writeset, (void *) exceptset,
timeout ? (s32_t)timeout->tv_sec : (s32_t)-1,
timeout ? (s32_t)timeout->tv_usec : (s32_t)-1));
/* Go through each socket in each list to count number of sockets which
currently match */
nready = lwip_selscan(maxfdp1, readset, writeset, exceptset, &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) {
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_select: no timeout, returning 0\n"));
/* This is OK as the local fdsets are empty and nready is zero,
or we would have returned earlier. */
goto return_copy_fdsets;
}
/* None ready: 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.next = NULL;
select_cb.prev = NULL;
select_cb.readset = readset;
select_cb.writeset = writeset;
select_cb.exceptset = exceptset;
select_cb.sem_signalled = 0;
err = sys_sem_new(&select_cb.sem, 0);
if (err != ERR_OK) {
/* failed to create semaphore */
set_errno(ENOMEM);
return -1;
}
/* Protect the select_cb_list */
SYS_ARCH_PROTECT(lev);
/* Put this select_cb on top of list */
select_cb.next = select_cb_list;
if (select_cb_list != NULL) {
select_cb_list->prev = &select_cb;
}
select_cb_list = &select_cb;
/* Increasing this counter tells even_callback that the list has changed. */
select_cb_ctr++;
/* Now we can safely unprotect */
SYS_ARCH_UNPROTECT(lev);
/* Increase select_waiting for each socket we are interested in */
for(i = 0; i < maxfdp1; i++) {
if ((readset && FD_ISSET(i, readset)) ||
(writeset && FD_ISSET(i, writeset)) ||
(exceptset && FD_ISSET(i, exceptset))) {
struct lwip_sock *sock = tryget_socket(i);
LWIP_ASSERT("sock != NULL", sock != NULL);
SYS_ARCH_PROTECT(lev);
sock->select_waiting++;
LWIP_ASSERT("sock->select_waiting > 0", sock->select_waiting > 0);
SYS_ARCH_UNPROTECT(lev);
}
}
/* Call lwip_selscan again: there could have been events between
the last scan (whithout us on the list) and putting us on the list! */
nready = lwip_selscan(maxfdp1, readset, writeset, exceptset, &lreadset, &lwriteset, &lexceptset);
if (!nready) {
/* Still none ready, 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) {
/* Wait 1ms at least (0 means wait forever) */
msectimeout = 1;
}
}
waitres = sys_arch_sem_wait(&select_cb.sem, msectimeout);
}
/* Increase select_waiting for each socket we are interested in */
for(i = 0; i < maxfdp1; i++) {
if ((readset && FD_ISSET(i, readset)) ||
(writeset && FD_ISSET(i, writeset)) ||
(exceptset && FD_ISSET(i, exceptset))) {
struct lwip_sock *sock = tryget_socket(i);
LWIP_ASSERT("sock != NULL", sock != NULL);
SYS_ARCH_PROTECT(lev);
sock->select_waiting--;
LWIP_ASSERT("sock->select_waiting >= 0", sock->select_waiting >= 0);
SYS_ARCH_UNPROTECT(lev);
}
}
/* Take us off the list */
SYS_ARCH_PROTECT(lev);
if (select_cb.next != NULL) {
select_cb.next->prev = select_cb.prev;
}
if (select_cb_list == &select_cb) {
LWIP_ASSERT("select_cb.prev == NULL", select_cb.prev == NULL);
select_cb_list = select_cb.next;
} else {
LWIP_ASSERT("select_cb.prev != NULL", select_cb.prev != NULL);
select_cb.prev->next = select_cb.next;
}
/* Increasing this counter tells even_callback that the list has changed. */
select_cb_ctr++;
SYS_ARCH_UNPROTECT(lev);
sys_sem_free(&select_cb.sem);
if (waitres == SYS_ARCH_TIMEOUT) {
/* Timeout */
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_select: timeout expired\n"));
/* This is OK as the local fdsets are empty and nready is zero,
or we would have returned earlier. */
goto return_copy_fdsets;
}
/* See what's set */
nready = lwip_selscan(maxfdp1, readset, writeset, exceptset, &lreadset, &lwriteset, &lexceptset);
}
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_select: nready=%d\n", nready));
return_copy_fdsets:
set_errno(0);
if (readset) {
*readset = lreadset;
}
if (writeset) {
*writeset = lwriteset;
}
if (exceptset) {
*exceptset = lexceptset;
}
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_sock *sock;
struct lwip_select_cb *scb;
int last_select_cb_ctr;
SYS_ARCH_DECL_PROTECT(lev);
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_ARCH_PROTECT(lev);
if (conn->socket < 0) {
if (evt == NETCONN_EVT_RCVPLUS) {
conn->socket--;
}
SYS_ARCH_UNPROTECT(lev);
return;
}
s = conn->socket;
SYS_ARCH_UNPROTECT(lev);
}
sock = get_socket(s);
if (!sock) {
return;
}
} else {
return;
}
SYS_ARCH_PROTECT(lev);
/* 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;
case NETCONN_EVT_ERROR:
sock->errevent = 1;
break;
default:
LWIP_ASSERT("unknown event", 0);
break;
}
if (sock->select_waiting == 0) {
/* noone is waiting for this socket, no need to check select_cb_list */
SYS_ARCH_UNPROTECT(lev);
return;
}
/* Now decide if anyone is waiting for this socket */
/* NOTE: This code goes through the select_cb_list 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. */
/* At this point, SYS_ARCH is still protected! */
again:
for (scb = select_cb_list; scb != NULL; scb = scb->next) {
if (scb->sem_signalled == 0) {
/* semaphore not signalled yet */
int do_signal = 0;
/* Test this select call for our socket */
if (sock->rcvevent > 0) {
if (scb->readset && FD_ISSET(s, scb->readset)) {
do_signal = 1;
}
}
if (sock->sendevent != 0) {
if (!do_signal && scb->writeset && FD_ISSET(s, scb->writeset)) {
do_signal = 1;
}
}
if (sock->errevent != 0) {
if (!do_signal && scb->exceptset && FD_ISSET(s, scb->exceptset)) {
do_signal = 1;
}
}
if (do_signal) {
scb->sem_signalled = 1;
/* Don't call SYS_ARCH_UNPROTECT() before signaling the semaphore, as this might
lead to the select thread taking itself off the list, invalidagin the semaphore. */
sys_sem_signal(&scb->sem);
}
}
/* unlock interrupts with each step */
last_select_cb_ctr = select_cb_ctr;
SYS_ARCH_UNPROTECT(lev);
/* this makes sure interrupt protection time is short */
SYS_ARCH_PROTECT(lev);
if (last_select_cb_ctr != select_cb_ctr) {
/* someone has changed select_cb_list, restart at the beginning */
goto again;
}
}
SYS_ARCH_UNPROTECT(lev);
}
/**
* Unimplemented: Close one end of a full-duplex connection.
* Currently, the full connection is closed.
*/
int
lwip_shutdown(int s, int how)
{
struct lwip_sock *sock;
err_t err;
u8_t shut_rx = 0, shut_tx = 0;
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_shutdown(%d, how=%d)\n", s, how));
sock = get_socket(s);
if (!sock) {
return -1;
}
if (sock->conn != NULL) {
if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_TCP) {
sock_set_errno(sock, EOPNOTSUPP);
return EOPNOTSUPP;
}
} else {
sock_set_errno(sock, ENOTCONN);
return ENOTCONN;
}
if (how == SHUT_RD) {
shut_rx = 1;
} else if (how == SHUT_WR) {
shut_tx = 1;
} else if(how == SHUT_RDWR) {
shut_rx = 1;
shut_tx = 1;
} else {
sock_set_errno(sock, EINVAL);
return EINVAL;
}
err = netconn_shutdown(sock->conn, shut_rx, shut_tx);
sock_set_errno(sock, err_to_errno(err));
return (err == ERR_OK ? 0 : -1);
}
static int
lwip_getaddrname(int s, struct sockaddr *name, socklen_t *namelen, u8_t local)
{
struct lwip_sock *sock;
union sockaddr_aligned saddr;
ipX_addr_t naddr;
u16_t port;
sock = get_socket(s);
if (!sock) {
return -1;
}
/* get the IP address and port */
/* @todo: this does not work for IPv6, yet */
netconn_getaddr(sock->conn, ipX_2_ip(&naddr), &port, local);
IPXADDR_PORT_TO_SOCKADDR(NETCONNTYPE_ISIPV6(netconn_type(sock->conn)),
&saddr, &naddr, port);
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getaddrname(%d, addr=", s));
ipX_addr_debug_print(NETCONNTYPE_ISIPV6(netconn_type(sock->conn)),
SOCKETS_DEBUG, &naddr);
LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%"U16_F")\n", port));
if (*namelen > saddr.sa.sa_len) {
*namelen = saddr.sa.sa_len;
}
MEMCPY(name, &saddr, *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_sock *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: */
#if LWIP_SO_SNDTIMEO
case SO_SNDTIMEO:
#endif /* LWIP_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 (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != 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;
case IP_MULTICAST_LOOP:
if (*optlen < sizeof(u8_t)) {
err = EINVAL;
}
if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_UDP) {
err = EAFNOSUPPORT;
}
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 (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != 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_IPV6
/* Level: IPPROTO_IPV6 */
case IPPROTO_IPV6:
switch (optname) {
case IPV6_V6ONLY:
if (*optlen < sizeof(int)) {
err = EINVAL;
}
/* @todo: this does not work for datagram sockets, yet */
if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_TCP)
return 0;
break;
default:
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IPV6, UNIMPL: optname=0x%x, ..)\n",
s, optname));
err = ENOPROTOOPT;
} /* switch (optname) */
break;
#endif /* LWIP_IPV6 */
#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 (!NETCONNTYPE_ISUDPLITE(netconn_type(sock->conn))) {
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;
#ifdef LWIP_DEBUG
data.s = s;
#endif /* LWIP_DEBUG */
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_sock *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 = ip_get_option(sock->conn->pcb.ip, 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(netconn_type(sock->conn))) {
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 = netconn_type(sock->conn);
LWIP_DEBUGF(SOCKETS_DEBUG,
("lwip_getsockopt(%d, SOL_SOCKET, SO_TYPE): unrecognized socket type %d\n",
s, *(int *)optval));
} /* switch (netconn_type(sock->conn)) */
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, SOL_SOCKET, SO_TYPE) = %d\n",
s, *(int *)optval));
break;
case SO_ERROR:
/* only overwrite ERR_OK or tempoary errors */
if ((sock->err == 0) || (sock->err == EINPROGRESS)) {
sock_set_errno(sock, err_to_errno(sock->conn->last_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_SNDTIMEO
case SO_SNDTIMEO:
*(int *)optval = netconn_get_sendtimeout(sock->conn);
break;
#endif /* LWIP_SO_SNDTIMEO */
#if LWIP_SO_RCVTIMEO
case SO_RCVTIMEO:
*(int *)optval = netconn_get_recvtimeout(sock->conn);
break;
#endif /* LWIP_SO_RCVTIMEO */
#if LWIP_SO_RCVBUF
case SO_RCVBUF:
*(int *)optval = netconn_get_recvbufsize(sock->conn);
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*/
default:
LWIP_ASSERT("unhandled optname", 0);
break;
} /* 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:
inet_addr_from_ipaddr((struct in_addr*)optval, &sock->conn->pcb.udp->multicast_ip);
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, IP_MULTICAST_IF) = 0x%"X32_F"\n",
s, *(u32_t *)optval));
break;
case IP_MULTICAST_LOOP:
if ((sock->conn->pcb.udp->flags & UDP_FLAGS_MULTICAST_LOOP) != 0) {
*(u8_t*)optval = 1;
} else {
*(u8_t*)optval = 0;
}
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, IP_MULTICAST_LOOP) = %d\n",
s, *(int *)optval));
break;
#endif /* LWIP_IGMP */
default:
LWIP_ASSERT("unhandled optname", 0);
break;
} /* switch (optname) */
break;
#if LWIP_TCP
/* Level: IPPROTO_TCP */
case IPPROTO_TCP:
switch (optname) {
case TCP_NODELAY:
*(int*)optval = tcp_nagle_disabled(sock->conn->pcb.tcp);
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 */
default:
LWIP_ASSERT("unhandled optname", 0);
break;
} /* switch (optname) */
break;
#endif /* LWIP_TCP */
#if LWIP_IPV6
/* Level: IPPROTO_IPV6 */
case IPPROTO_IPV6:
switch (optname) {
case IPV6_V6ONLY:
*(int*)optval = ((sock->conn->flags & NETCONN_FLAG_IPV6_V6ONLY) ? 1 : 0);
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IPV6, IPV6_V6ONLY) = %d\n",
s, *(int *)optval));
break;
default:
LWIP_ASSERT("unhandled optname", 0);
break;
} /* switch (optname) */
break;
#endif /* LWIP_IPV6 */
#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;
default:
LWIP_ASSERT("unhandled optname", 0);
break;
} /* switch (optname) */
break;
#endif /* LWIP_UDP */
default:
LWIP_ASSERT("unhandled level", 0);
break;
} /* 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_sock *sock = get_socket(s);
err_t 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: */
#if LWIP_SO_SNDTIMEO
case SO_SNDTIMEO:
#endif /* LWIP_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 ((NETCONNTYPE_GROUP(netconn_type(sock->conn)) != 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(netconn_type(sock->conn)) != NETCONN_UDP) {
err = EAFNOSUPPORT;
}
break;
case IP_MULTICAST_IF:
if (optlen < sizeof(struct in_addr)) {
err = EINVAL;
}
if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_UDP) {
err = EAFNOSUPPORT;
}
break;
case IP_MULTICAST_LOOP:
if (optlen < sizeof(u8_t)) {
err = EINVAL;
}
if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_UDP) {
err = EAFNOSUPPORT;
}
break;
case IP_ADD_MEMBERSHIP:
case IP_DROP_MEMBERSHIP:
if (optlen < sizeof(struct ip_mreq)) {
err = EINVAL;
}
if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != 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 (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != 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_IPV6
/* Level: IPPROTO_IPV6 */
case IPPROTO_IPV6:
switch (optname) {
case IPV6_V6ONLY:
if (optlen < sizeof(int)) {
err = EINVAL;
}
/* @todo: this does not work for datagram sockets, yet */
if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_TCP)
return 0;
break;
default:
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_IPV6, UNIMPL: optname=0x%x, ..)\n",
s, optname));
err = ENOPROTOOPT;
} /* switch (optname) */
break;
#endif /* LWIP_IPV6 */
#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 (!NETCONNTYPE_ISUDPLITE(netconn_type(sock->conn)))
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;
#ifdef LWIP_DEBUG
data.s = s;
#endif /* LWIP_DEBUG */
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_sock *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) {
ip_set_option(sock->conn->pcb.ip, optname);
} else {
ip_reset_option(sock->conn->pcb.ip, 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_SNDTIMEO
case SO_SNDTIMEO:
netconn_set_sendtimeout(sock->conn, (s32_t)*(int*)optval);
break;
#endif /* LWIP_SO_SNDTIMEO */
#if LWIP_SO_RCVTIMEO
case SO_RCVTIMEO:
netconn_set_recvtimeout(sock->conn, *(int*)optval);
break;
#endif /* LWIP_SO_RCVTIMEO */
#if LWIP_SO_RCVBUF
case SO_RCVBUF:
netconn_set_recvbufsize(sock->conn, *(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 */
default:
LWIP_ASSERT("unhandled optname", 0);
break;
} /* 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, ..) -> %d\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, ..)-> %d\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:
inet_addr_to_ipaddr(&sock->conn->pcb.udp->multicast_ip, (struct in_addr*)optval);
break;
case IP_MULTICAST_LOOP:
if (*(u8_t*)optval) {
udp_setflags(sock->conn->pcb.udp, udp_flags(sock->conn->pcb.udp) | UDP_FLAGS_MULTICAST_LOOP);
} else {
udp_setflags(sock->conn->pcb.udp, udp_flags(sock->conn->pcb.udp) & ~UDP_FLAGS_MULTICAST_LOOP);
}
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;
ip_addr_t if_addr;
ip_addr_t multi_addr;
inet_addr_to_ipaddr(&if_addr, &imr->imr_interface);
inet_addr_to_ipaddr(&multi_addr, &imr->imr_multiaddr);
if(optname == IP_ADD_MEMBERSHIP){
data->err = igmp_joingroup(&if_addr, &multi_addr);
} else {
data->err = igmp_leavegroup(&if_addr, &multi_addr);
}
if(data->err != ERR_OK) {
data->err = EADDRNOTAVAIL;
}
}
break;
#endif /* LWIP_IGMP */
default:
LWIP_ASSERT("unhandled optname", 0);
break;
} /* switch (optname) */
break;
#if LWIP_TCP
/* Level: IPPROTO_TCP */
case IPPROTO_TCP:
switch (optname) {
case TCP_NODELAY:
if (*(int*)optval) {
tcp_nagle_disable(sock->conn->pcb.tcp);
} else {
tcp_nagle_enable(sock->conn->pcb.tcp);
}
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) -> %"U32_F"\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) -> %"U32_F"\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) -> %"U32_F"\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) -> %"U32_F"\n",
s, sock->conn->pcb.tcp->keep_cnt));
break;
#endif /* LWIP_TCP_KEEPALIVE */
default:
LWIP_ASSERT("unhandled optname", 0);
break;
} /* switch (optname) */
break;
#endif /* LWIP_TCP*/
#if LWIP_IPV6
/* Level: IPPROTO_IPV6 */
case IPPROTO_IPV6:
switch (optname) {
case IPV6_V6ONLY:
if (*(int*)optval) {
sock->conn->flags |= NETCONN_FLAG_IPV6_V6ONLY;
} else {
sock->conn->flags &= ~NETCONN_FLAG_IPV6_V6ONLY;
}
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_IPV6, IPV6_V6ONLY, ..) -> %d\n",
s, ((sock->conn->flags & NETCONN_FLAG_IPV6_V6ONLY) ? 1 : 0)));
break;
default:
LWIP_ASSERT("unhandled optname", 0);
break;
} /* switch (optname) */
break;
#endif /* LWIP_IPV6 */
#if LWIP_UDP && LWIP_UDPLITE
/* Level: IPPROTO_UDPLITE */
case IPPROTO_UDPLITE:
switch (optname) {
case UDPLITE_SEND_CSCOV:
if ((*(int*)optval != 0) && ((*(int*)optval < 8) || (*(int*)optval > 0xffff))) {
/* don't allow illegal values! */
sock->conn->pcb.udp->chksum_len_tx = 8;
} else {
sock->conn->pcb.udp->chksum_len_tx = (u16_t)*(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) || (*(int*)optval > 0xffff))) {
/* don't allow illegal values! */
sock->conn->pcb.udp->chksum_len_rx = 8;
} else {
sock->conn->pcb.udp->chksum_len_rx = (u16_t)*(int*)optval;
}
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_UDPLITE, UDPLITE_RECV_CSCOV) -> %d\n",
s, (*(int*)optval)) );
break;
default:
LWIP_ASSERT("unhandled optname", 0);
break;
} /* switch (optname) */
break;
#endif /* LWIP_UDP */
default:
LWIP_ASSERT("unhandled level", 0);
break;
} /* switch (level) */
sys_sem_signal(&sock->conn->op_completed);
}
int
lwip_ioctl(int s, long cmd, void *argp)
{
struct lwip_sock *sock = get_socket(s);
u8_t val;
#if LWIP_SO_RCVBUF
u16_t buflen = 0;
s16_t recv_avail;
#endif /* LWIP_SO_RCVBUF */
if (!sock) {
return -1;
}
switch (cmd) {
#if LWIP_SO_RCVBUF || LWIP_FIONREAD_LINUXMODE
case FIONREAD:
if (!argp) {
sock_set_errno(sock, EINVAL);
return -1;
}
#if LWIP_FIONREAD_LINUXMODE
if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_TCP) {
struct pbuf *p;
if (sock->lastdata) {
p = ((struct netbuf *)sock->lastdata)->p;
} else {
struct netbuf *rxbuf;
err_t err;
if (sock->rcvevent <= 0) {
*((u16_t*)argp) = 0;
} else {
err = netconn_recv(sock->conn, &rxbuf);
if (err != ERR_OK) {
*((u16_t*)argp) = 0;
} else {
sock->lastdata = rxbuf;
*((u16_t*)argp) = rxbuf->p->tot_len;
}
}
}
return 0;
}
#endif /* LWIP_FIONREAD_LINUXMODE */
#if LWIP_SO_RCVBUF
/* we come here if either LWIP_FIONREAD_LINUXMODE==0 or this is a TCP socket */
SYS_ARCH_GET(sock->conn->recv_avail, recv_avail);
if (recv_avail < 0) {
recv_avail = 0;
}
*((u16_t*)argp) = (u16_t)recv_avail;
/* Check if there is data left from the last recv operation. /maq 041215 */
if (sock->lastdata) {
struct pbuf *p = (struct pbuf *)sock->lastdata;
if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_TCP) {
p = ((struct netbuf *)p)->p;
}
buflen = p->tot_len;
buflen -= sock->lastoffset;
*((u16_t*)argp) += buflen;
}
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_ioctl(%d, FIONREAD, %p) = %"U16_F"\n", s, argp, *((u16_t*)argp)));
sock_set_errno(sock, 0);
return 0;
#else /* LWIP_SO_RCVBUF */
break;
#endif /* LWIP_SO_RCVBUF */
#endif /* LWIP_SO_RCVBUF || LWIP_FIONREAD_LINUXMODE */
case FIONBIO:
val = 0;
if (argp && *(u32_t*)argp) {
val = 1;
}
netconn_set_nonblocking(sock->conn, val);
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_ioctl(%d, FIONBIO, %d)\n", s, val));
sock_set_errno(sock, 0);
return 0;
default:
break;
} /* switch (cmd) */
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;
}
/** A minimal implementation of fcntl.
* Currently only the commands F_GETFL and F_SETFL are implemented.
* Only the flag O_NONBLOCK is implemented.
*/
int
lwip_fcntl(int s, int cmd, int val)
{
struct lwip_sock *sock = get_socket(s);
int ret = -1;
if (!sock || !sock->conn) {
return -1;
}
switch (cmd) {
case F_GETFL:
ret = netconn_is_nonblocking(sock->conn) ? O_NONBLOCK : 0;
break;
case F_SETFL:
if ((val & ~O_NONBLOCK) == 0) {
/* only O_NONBLOCK, all other bits are zero */
netconn_set_nonblocking(sock->conn, val & O_NONBLOCK);
ret = 0;
}
break;
default:
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_fcntl(%d, UNIMPL: %d, %d)\n", s, cmd, val));
break;
}
return ret;
}
#endif /* LWIP_SOCKET */
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