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vpx_network.c
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vpx_network.c
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/*
* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "tctypes.h"
#include "rtp.h"
#include <stdio.h>
#include <ctype.h> //for tolower
#include <string.h>
#if defined(_WIN32_WCE) && defined(WIN32_PLATFORM_WFSP)
//INITGUID needs to be defined before DEFINE_GUID is defined
# define INITGUID
#endif
#include "vpx_network.h"
#if ENABLE_LOGGING
# ifndef vpx_NO_GLOBALS
static int module_loglevel = 0;
# else
# include "vpx_global_handling.h"
# define module_loglevel VPXGLOBALm(vpx_network,module_loglevel)
# endif
#endif
#ifndef INVALID_SOCKET
# define INVALID_SOCKET -1
#endif
#ifndef SOCKET_ERROR
# define SOCKET_ERROR -1
#endif
#if vpx_NET_SUPPORT_IPV6
# define supported_network_layer(n) ((n == vpx_IPv4) || (n == vpx_IPv6))
#else
# define supported_network_layer(n) (n == vpx_IPv4)
#endif
#define supported_transport_layer(t) ((t == vpx_TCP) || (t == vpx_UDP))
#if defined(__SYMBIAN32__)
# include <in_sock.h>
/*the prototype for bzero appears in symbian's headers, but bzero is
not in the libs (Series60 v2.1)*/
# define bzero(p,s) memset(p,0,s)
#endif
#if defined(_WIN32_WCE) && defined(WIN32_PLATFORM_WFSP)
# include <connmgr.h>
static HANDLE g_cxhandle = NULL; //data connection handle
#endif
enum
{
kInited = 0x01,
kBound = 0x02,
kConnected = 0x04,
kListening = 0x08
};
static TCRV socket_option(struct vpxsocket *vpx_sock, tc8 set, tc32 level,
tc32 option, void *value, tc32 optlen);
static tc32 set_nonblocking_io(struct vpxsocket *vpx_sock, tc32 on);
/*
*
* Exposed library functions
*
*/
/*
vpx_net_init()
Performs any necessary system dependent network initialization
Return: TC_OK on success, TC_ERROR otherwise
*/
TCRV vpx_net_init()
{
TCRV rv = TC_OK;
#if defined(WIN32) || defined(_WIN32_WCE)
WSADATA wsa_data;
#endif
//module_loglevel = VPXLOG_DEBUG;
vpxlog_dbg(LOG_PACKET,"vpx_network version: %s\n", vpx_network_version);
#if defined(WIN32) || defined(_WIN32_WCE)
//smartphone
# if defined(WIN32_PLATFORM_WFSP)
if (!g_cxhandle)
{
CONNMGR_CONNECTIONINFO ci = {0};
DWORD status;
HANDLE connection;
HRESULT hr;
ci.cbSize = sizeof(CONNMGR_CONNECTIONINFO);
ci.dwParams = CONNMGR_PARAM_GUIDDESTNET; //| CONNMGR_PARAM_MINRCVBW
#ifdef _X86_
/*the emulator has a proxy connection setup to access the internet;
w/o this flag set the call will fail*/
ci.dwFlags = CONNMGR_FLAG_PROXY_HTTP;
#else
ci.dwFlags = 0;
#endif
ci.dwPriority = CONNMGR_PRIORITY_USERINTERACTIVE;
ci.bExclusive = FALSE; //share connection among apps
ci.bDisabled = FALSE;
ci.guidDestNet = IID_DestNetCorp;
hr = ConnMgrEstablishConnectionSync(&ci, &connection, 50000, &status);
if (hr == E_FAIL && status == CONNMGR_STATUS_NOPATHTODESTINATION)
{
vpxlog_error("vpx_net_init: connection to IID_DestNetCorp failed."
" attempting DestNetInternet\n");
ci.guidDestNet = IID_DestNetInternet;
hr = ConnMgrEstablishConnectionSync(&ci, &connection, 50000, &status);
}
if (hr == S_OK && status == CONNMGR_STATUS_CONNECTED)
{
vpxlog_info("vpx_net_init: ConnMgrEstablishConnectionSync success\n");
}
else
{
rv = TC_ERROR;
vpxlog_error("vpx_net_init: ConnMgrEstablishConnectionSync failed,"
" hr:%u status:%u\n", hr, status);
}
}
# endif
/*
Initialize windows networking services
WINSOCK_VERSION is defined in winsock2.h
if the initialization fails or the returned version
is not equal to what we asked for, return an error
*/
if (WSAStartup(WINSOCK_VERSION, &wsa_data) ||
(LOBYTE(wsa_data.wVersion) != LOBYTE(WINSOCK_VERSION)) ||
(HIBYTE(wsa_data.wVersion) != HIBYTE(WINSOCK_VERSION)))
{
WSACleanup();
rv = TC_ERROR;
}
#endif
return rv;
}
/*
vpx_net_destroy()
Performs any necessary system dependent network deinitialization
*/
void vpx_net_destroy()
{
#if defined(WIN32) || defined(_WIN32_WCE)
# if defined(WIN32_PLATFORM_WFSP)
if (g_cxhandle)
{
//release our data connection immediately
ConnMgrReleaseConnection(g_cxhandle, 0);
g_cxhandle = NULL;
}
# endif
WSACleanup();
#endif
}
/*
vpx_net_open(struct vpxsocket* vpx_sock, enum network_layer net_layer,
enum transport_layer trans_layer)
vpx_sock - pointer to an vpxsocket structure that is to hold network info
net_layer - network layer of the socket to be created
trans_layer - transport layer of the socket to be created
Attempts to create a socket with the specified network
and transport layer. Read and send timeouts default to vpx_NET_NO_TIMEOUT.
Return:
TC_OK: on success
TC_INVALID_PARAMS: if vpx_sock is NULL or if the network/transport
layer is not supported.
TC_ERROR: if a socket could not be created.
*/
TCRV vpx_net_open(struct vpxsocket *vpx_sock,
enum network_layer net_layer,
enum transport_layer trans_layer)
{
TCRV rv = TC_INVALID_PARAMS;
if (vpx_sock && supported_transport_layer(trans_layer) &&
supported_network_layer(net_layer))
{
memset(vpx_sock, 0, sizeof(struct vpxsocket));
vpx_sock->nl = net_layer;
vpx_sock->tl = trans_layer;
switch (vpx_sock->nl)
{
case vpx_IPv4:
vpx_sock->sock = socket(PF_INET, trans_layer, 0);
break;
case vpx_IPv6:
#if vpx_NET_SUPPORT_IPV6
vpx_sock->sock = socket(PF_INET6, trans_layer, 0);
#endif
break;
}
if (vpx_sock->sock != INVALID_SOCKET)
{
rv = TC_OK;
vpx_sock->state = kInited;
vpx_sock->read_timeout_ms = vpx_NET_NO_TIMEOUT;
vpx_sock->send_timeout_ms = vpx_NET_NO_TIMEOUT;
}
else
rv = TC_ERROR;
}
return rv;
}
/*
vpx_net_close(struct vpxsocket* vpx_sock)
vpx_sock - pointer to an vpxsocket structure which
holds the socket to be closed
Attempts to close the socket associated with the vpx_sock structure
Return:
TC_OK: on success
TC_INVALID_PARAMS: if vpx_sock is NULL
TC_ERROR: if the socket could not be closed
*/
TCRV vpx_net_close(struct vpxsocket *vpx_sock)
{
TCRV rv = TC_INVALID_PARAMS;
if (vpx_sock && (vpx_sock->state & kInited))
{
#if defined(WIN32) || defined(_WIN32_WCE)
rv = closesocket(vpx_sock->sock) ? TC_ERROR : TC_OK;
#else
int ret;
ret = close(vpx_sock->sock);
rv = (ret) ? TC_ERROR : TC_OK;
vpxlog_dbg(LOG_PACKET, "vpx_net_close: fd=%d ret=%d eno=%d\n",
vpx_sock->sock, ret, errno);
#endif
vpx_sock->state = 0;
}
return rv;
}
/*
vpx_net_bind(struct vpxsocket* vpx_sock,
union vpx_sockaddr_x* vpx_sa_x,
tcu16 port)
vpx_sock - pointer to an vpxsocket structure that contains
the socket to be bound
vpx_sa_x - pointer to an vpx_sockaddr_x struct that contains the
interface to bind to or NULL if the user wants to
bind to any interface.
port - the port to bind the socket to
Attempts to bind vpx_sock to port on the interface specified in vpx_sa_x
or to any interface if vpx_sa_x is NULL. If provided vpx_sa_x should have
been filled out by vpx_net_get_addr_info.
Return:
TC_OK: on success
TC_INVALID_PARAMS: if vpx_sock is NULL or does not point to a structure
that was initialized via vpx_net_open
TC_ERROR: if vpx_sock could not be bound to the specified port
and interface
*/
TCRV vpx_net_bind(struct vpxsocket *vpx_sock,
union vpx_sockaddr_x *vpx_sa_x,
tcu16 port)
{
TCRV rv = TC_INVALID_PARAMS;
if (vpx_sock && (vpx_sock->state & kInited))
{
tc32 ret = SOCKET_ERROR;
switch (vpx_sock->nl)
{
case vpx_IPv4:
vpx_sock->local_addr.sa_in.sin_family = AF_INET;
vpx_sock->local_addr.sa_in.sin_addr.s_addr = vpx_sa_x ?
vpx_sa_x->sa_in.sin_addr.s_addr :
INADDR_ANY;
vpx_sock->local_addr.sa_in.sin_port = htons(port);
ret = bind(vpx_sock->sock, (struct sockaddr *)&vpx_sock->local_addr.sa_in,
sizeof(struct sockaddr_in));
break;
case vpx_IPv6:
#if vpx_NET_SUPPORT_IPV6
vpx_sock->local_addr.sa_in6.sin6_family = AF_INET6;
vpx_sock->local_addr.sa_in6.sin6_addr = vpx_sa_x ?
vpx_sa_x->sa_in6.sin6_addr :
in6addr_any;
vpx_sock->local_addr.sa_in6.sin6_port = htons(port);
ret = bind(vpx_sock->sock, (struct sockaddr *)&vpx_sock->local_addr.sa_in6,
sizeof(struct sockaddr_in6));
#endif
break;
}
if (ret != SOCKET_ERROR)
{
vpx_sock->state |= kBound;
rv = TC_OK;
}
else
rv = TC_ERROR;
}
return rv;
}
/*
vpx_net_listen(struct vpxsocket* vpx_sock, tc32 backlog)
vpx_sock - pointer to a properly initialized and bound vpxsocket
structure to be setup to listen for incoming connections
backlog - the maximum length the queue of pending connections can grow to.
If the value is less than 1, backlog will be set to the system's
maximum value.
Attempts to put vpx_sock into a state where it can accept incoming connections.
Return:
TC_OK: on success
TC_INVALID_PARAMS: if vpx_sock is NULL, not properly initialized and bound,
or if the transport layer does not support listening
TC_ERROR: if the vpx_sock could not be put into the listening state
*/
TCRV vpx_net_listen(struct vpxsocket *vpx_sock, tc32 backlog)
{
TCRV rv = TC_INVALID_PARAMS;
if (vpx_sock && (vpx_sock->state & kBound) && (vpx_sock->tl == vpx_TCP))
{
if (backlog < 1)
backlog = SOMAXCONN;
if (listen(vpx_sock->sock, backlog) != SOCKET_ERROR)
{
rv = TC_OK;
vpx_sock->state |= kListening;
}
else
rv = TC_ERROR;
}
return rv;
}
/*
vpx_net_accept(struct vpxsocket* vpx_sock, struct vpxsocket* vpx_sock_peer)
vpx_sock - pointer to a properly initialized, bound and listening
vpxsocket structure
vpx_sock_peer - result parameter; pointer to an vpxsocket structure that
will be filled out with the accepted connection's info
Attempts to have vpx_sock accept connections on the port it's currently
listening. If successful, vpx_sock_peer will be filled out with the
remote peer's info.
Return:
TC_OK: on success
TC_INVALID_PARAMS: if vpx_sock is NULL, was not put into the listening
state via vpx_net_listen or vpx_sock_peer is NULL
TC_ERROR: if there was an error accepting connections on vpx_sock
*/
TCRV vpx_net_accept(struct vpxsocket *vpx_sock, struct vpxsocket *vpx_sock_peer)
{
TCRV rv = TC_INVALID_PARAMS;
if (vpx_sock && (vpx_sock->state & kListening) && vpx_sock_peer)
{
unsigned int len;
switch (vpx_sock->nl)
{
case vpx_IPv4:
len = sizeof(struct sockaddr_in);
vpx_sock_peer->sock = accept(vpx_sock->sock,
(struct sockaddr *)&vpx_sock_peer->remote_addr.sa_in,
&len);
break;
case vpx_IPv6:
#if vpx_NET_SUPPORT_IPV6
len = sizeof(struct sockaddr_in6);
vpx_sock_peer->sock = accept(vpx_sock->sock,
(struct sockaddr *)&vpx_sock_peer->remote_addr.sa_in6,
&len);
#endif
break;
}
if (vpx_sock_peer->sock != INVALID_SOCKET)
{
vpx_sock_peer->nl = vpx_sock->nl;
vpx_sock_peer->tl = vpx_sock->tl;
vpx_sock_peer->state = kInited | kConnected;
vpx_sock_peer->read_timeout_ms = vpx_NET_NO_TIMEOUT;
vpx_sock_peer->send_timeout_ms = vpx_NET_NO_TIMEOUT;
rv = TC_OK;
}
else
rv = TC_ERROR;
}
return rv;
}
/*
vpx_net_connect(struct vpxsocket* vpx_sock, tc8* ip_addr, tcu16 port)
vpx_sock - pointer to an vpxsocket structure that is to be connencted
to the endpoint described by ip_addr and port
ip_addr - pointer to a character string that contains the address to
attempt to connect to
port - the port to attempt to connect to on ip_addr
Attempt to connect vpx_sock to port on ip_addr.
Return:
TC_OK: on success
TC_INVALID_PARAMS: if vpx_sock is NULL, not properly initialized or
if ip_addr is NULL
TC_ERROR: if information could not be obtained about the host or
if a connection could not be established
*/
TCRV vpx_net_connect(struct vpxsocket *vpx_sock, tc8 *ip_addr, tcu16 port)
{
TCRV rv = TC_INVALID_PARAMS;
if (vpx_sock && (vpx_sock->state & kInited))
{
rv = vpx_net_get_addr_info(ip_addr, port, vpx_sock->nl, vpx_sock->tl, &vpx_sock->remote_addr);
if (!rv)
{
tc32 ret = 0;
switch (vpx_sock->nl)
{
case vpx_IPv4:
ret = connect(vpx_sock->sock,
(struct sockaddr *)&vpx_sock->remote_addr.sa_in,
sizeof(struct sockaddr_in));
break;
case vpx_IPv6:
#if vpx_NET_SUPPORT_IPV6
ret = connect(vpx_sock->sock,
(struct sockaddr *)&vpx_sock->remote_addr.sa_in6,
sizeof(struct sockaddr_in6));
#endif
break;
}
if (!ret)
{
rv = TC_OK;
vpx_sock->state |= kConnected;
}
else
rv = TC_ERROR;
}
}
return rv;
}
/*
vpx_net_get_addr_info(tc8* ip_addr,
tcu16 port,
enum network_layer net_layer,
enum transport_layer trans_layer,
union vpx_sockaddr_x* vpx_sa_x)
ip_addr - address to resolve
port - port on ip_addr to obtain information for or 0 indicating any
net_layer - network layer desired on the host machine
trans_layer - the transport layer desired on the host machine
vpx_sa_x - pointer to an vpx_sockaddr_x union that will receive host
information if obtained
Attempts to acquire information about ip_addr that can be used in a
connection attempt. This information will be stored in vpx_sa_x which
can be used in subsequent vpx_net_ functions
Return:
TC_OK: on success
TC_INVALID_PARAMS: if ip_addr or vpx_sa_x are NULL or if the specified
network/transport layers are unsupported by this library
TC_ERROR: if no information could be obtained about the host
*/
TCRV vpx_net_get_addr_info(tc8 *ip_addr,
tcu16 port,
enum network_layer net_layer,
enum transport_layer trans_layer,
union vpx_sockaddr_x *vpx_sa_x)
{
TCRV rv = TC_INVALID_PARAMS;
if (ip_addr && vpx_sa_x &&
supported_network_layer(net_layer) &&
supported_transport_layer(trans_layer))
{
#if vpx_NET_SUPPORT_IPV6
char portstr[6];
struct addrinfo hints;
struct addrinfo *host = NULL;
memset(&hints, 0, sizeof(struct addrinfo));
hints.ai_socktype = trans_layer;
switch (net_layer)
{
case vpx_IPv4:
hints.ai_family = PF_INET;
break;
case vpx_IPv6:
hints.ai_family = PF_INET6;
break;
}
sprintf(portstr, "%hu", port);
if (!getaddrinfo(ip_addr, portstr, &hints, &host))
{
memcpy(&vpx_sa_x->sa_in6, host->ai_addr, host->ai_addrlen);
freeaddrinfo(host);
rv = TC_OK;
}
else
rv = TC_ERROR;
#else
tc8 *p = ip_addr;
tc8 is_host_name = 0;
//IPv4, unfortunately gethostbyname will fail if given a dotted decimal ip,
//unlike getaddrinfo. So to avoid any delay's we check to see what
//representation of an ip we have,
//if there's a letter assume we have a hostname
while (*p && !(is_host_name = (tolower(*p) >= 'a' && tolower(*p) <= 'z'))) ++p;
if (is_host_name)
{
#if defined(__SYMBIAN32__) && !defined(__WINS__)
//vpxlog_dbg("Trying to get address by name %s:%d\n", ip_addr, port);
{
RSocketServ iSocketServ;
TNameEntry iNameEntry;
TNameRecord iNameRecord;
RHostResolver iResolver;
TRequestStatus iStatus;
User::LeaveIfError(iSocketServ.Connect());
User::LeaveIfError(iResolver.Open(iSocketServ, KAfInet, KProtocolInetUdp));
TPtrC8 ihostname8((const TUint8 *)ip_addr, strlen(ip_addr));
TBuf<256> ihostname;
ihostname.Copy(ihostname8);
//vpxlog_dbg("ihostname = %s\n", ihostname.Ptr());
iResolver.GetByName(ihostname, iNameEntry, iStatus);
User::WaitForRequest(iStatus);
if (iStatus == KErrNone)
{
iNameRecord = iNameEntry();
TInetAddr addr;
addr = TInetAddr::Cast(iNameRecord.iAddr);
bzero(&vpx_sa_x->sa_in, sizeof(struct sockaddr_in));
vpx_sa_x->sa_in.sin_addr.s_addr = ntohl(addr.Address());
vpx_sa_x->sa_in.sin_family = AF_INET;
vpx_sa_x->sa_in.sin_port = htons(port);
rv = TC_OK;
//vpxlog_dbg("I got an address of %x\n",vpx_sa_x->sa_in.sin_addr.s_addr);
}
else
{
rv = TC_ERROR;
//vpxlog_dbg("I got an error message %d\n",iStatus.Int() );
}
iResolver.Close();
iSocketServ.Close();
}
#else
#if defined(VXWORKS)
tc32 host;
/* The only way VxWorks will be able to resolve a host name
is if it's in its host table or if the image was built with
the resolvLib included */
if ((host = hostGetByName(ip_addr)) != ERROR)
{
vpx_sa_x->sa_in.sin_addr.s_addr = host;
#else
struct hostent *host;
if ((host = gethostbyname(ip_addr)))
{
memcpy(&vpx_sa_x->sa_in.sin_addr, host->h_addr_list[0], sizeof(struct in_addr));
#endif
vpx_sa_x->sa_in.sin_family = AF_INET;
vpx_sa_x->sa_in.sin_port = htons(port);
rv = TC_OK;
}
else
{
//could not resolve host name
rv = TC_ERROR;
}
//vpxlog_dbg("gethostbyname returned %d %x\n", rv, host);
#endif
}
else
{
#if defined(__SYMBIAN32__)
bzero(&vpx_sa_x->sa_in, sizeof(struct sockaddr_in));
if ((vpx_sa_x->sa_in.sin_addr.s_addr = inet_addr(ip_addr)) != INADDR_NONE)
{
#elif defined(WIN32) || defined(_WIN32_WCE)
if ((vpx_sa_x->sa_in.sin_addr.s_addr = inet_addr(ip_addr)) != INADDR_NONE)
{
#else
if ((vpx_sa_x->sa_in.sin_addr.s_addr = inet_addr(ip_addr)) > 0)
{
#endif
vpx_sa_x->sa_in.sin_family = AF_INET;
vpx_sa_x->sa_in.sin_port = htons(port);
rv = TC_OK;
}
else
{
vpxlog_dbg(ERRORS, "vpx_network: inet_addr() call returned INADDR_NONE\n");
rv = TC_ERROR;
}
}
#endif
}
return rv;
}
/*
vpx_net_read(struct vpxsocket* vpx_sock, tc8* buffer,
tc32 buf_len, tc32* bytes_read)
vpx_sock - pointer to a properly initialized vpxsocket structure
buffer - pointer to a character array where data is to be stored
buf_len - the max max amount of data to be read into buffer
bytes_read - pointer to an integer that will receive the actual amount
of data read or NULL
Attempts to read at most buf_len bytes off the socket into buffer. This
operation can only be done on a connected socket. If a read timeout has
been set to a non-zero value the operation will fail if it could not be
completed within the specified time. If the read timeout has been set to
0 the operation will fail if it could not be completed immediately.
Return:
TC_OK: on success
TC_INVALID_PARAMS: if vpx_sock is NULL, was not properly initialized
via vpx_net_open, was not connected via
vpx_net_connect, buffer is NULL or buf_len is <= 0
TC_TIMEDOUT: if a read timeout has been set to non-zero value and the
operation could not be completed in the specified time
TC_WOULDBLOCK: if the read timeout has been set to 0 and the operation
could not be completed immediately
TC_ERROR: if an error other than timed out or would block is encountered
trying to complete the operation, more information can be
obtained through calling vpx_net_get_error
*/
TCRV vpx_net_read(struct vpxsocket *vpx_sock, tc8 *buffer,
tc32 buf_len, tc32 *bytes_read)
{
TCRV rv = TC_INVALID_PARAMS;
if (vpx_sock && (vpx_sock->state & kConnected) && buffer && (buf_len > 0))
{
tc32 total_bytes_read = 0,
ret;
if (vpx_sock->read_timeout_ms)
{
struct timeval tv;
fd_set read_fds;
FD_ZERO(&read_fds);
FD_SET(vpx_sock->sock, &read_fds);
if (vpx_sock->read_timeout_ms != vpx_NET_NO_TIMEOUT)
{
tv.tv_sec = 0;
tv.tv_usec = vpx_sock->read_timeout_ms * 1000;
#if !defined(__SYMBIAN32__)
ret = select(vpx_sock->sock + 1, &read_fds, NULL, NULL, &tv);
#else
/*jwz 2005-10-04, symbian seems only to define a blocking select
via ioctl; as the client doesn't currently hit this path I
haven't looked for a replacement*/
ret = -1;
vpxassert(vpx_sock->read_timeout_ms == vpx_NET_NO_TIMEOUT);
#endif
}
else
{
#if !defined(__SYMBIAN32__)
ret = select(vpx_sock->sock + 1, &read_fds, NULL, NULL, NULL);
#else
/*jwz 2005-10-04, symbian seems only to define a blocking select
via ioctl; this select was unnecessary as the socket is set to
blocking.*/
ret = 1;
#endif
}
if (ret > 0)
{
tc32 n = 0;
#if defined(WIN32) || defined(_WIN32_WCE)
unsigned long recv_len = 0;
ioctlsocket(vpx_sock->sock, FIONREAD, &recv_len);
#elif defined(VXWORKS)
tcu32 recv_len = 0;
ioctl(vpx_sock->sock, FIONREAD, (tc32)&recv_len);
#elif defined(__SYMBIAN32__)
tcu32 recv_len = 0;
ioctl(vpx_sock->sock, E32IONREAD, &recv_len);
#else
tcu32 recv_len = 0;
ioctl(vpx_sock->sock, FIONREAD, &recv_len);
#endif
/* At this point select has said that the socket is readable.
We want to try to read once before checking the amount
available on the socket in case there is an error pending,
in which case recv_len would be 0. */
do
{
n = recv(vpx_sock->sock, buffer + total_bytes_read, buf_len, 0);
total_bytes_read += n;
buf_len -= n;
}
while (buf_len && ((tcu32)total_bytes_read < recv_len) && (n > 0));
rv = (n <= 0) ? TC_ERROR : TC_OK;
}
else if (ret < 0)
rv = TC_ERROR;
else
rv = TC_TIMEDOUT;
}
else
{
//set the socket to non-blocking...
if (!set_nonblocking_io(vpx_sock, 1))
{
#if defined(WIN32) || defined(_WIN32_WCE)
tc32 error = 0;
#endif
total_bytes_read = recv(vpx_sock->sock, buffer, buf_len, 0);
if (total_bytes_read < 0)
{
#if defined(LINUX) || defined(VXWORKS) || defined(__uClinux__) || defined(__SYMBIAN32__)
switch (errno)
{
case EAGAIN:
#if defined(EWOULDBLOCK) && EAGAIN != EWOULDBLOCK
case EWOULDBLOCK:
#endif
rv = TC_WOULDBLOCK;
break;
case EINTR:
case EFAULT:
rv = TC_ERROR;
break;
default:
/* default return is TC_INVALID_PARAMS and
covers EBADF, ENOTCONN, ENOTSOCK, EINVAL, etc */
break;
}
#elif defined(WIN32) || defined(_WIN32_WCE)
switch (error = WSAGetLastError())
{
case WSAEWOULDBLOCK:
rv = TC_WOULDBLOCK;
break;
case WSAEMSGSIZE:
rv = TC_MSG_TOO_LARGE;
break;
case WSAENETDOWN:
case WSAEFAULT:
case WSAEINTR:
case WSAEINPROGRESS:
case WSAENETRESET:
case WSAESHUTDOWN:
case WSAECONNABORTED:
case WSAETIMEDOUT:
case WSAECONNRESET:
rv = TC_ERROR;
break;
default:
/* defaults are approximately equal to those
described in the LINUX #if block */
break;
}
#endif
}
else
rv = TC_OK;
//reset the socket to blocking...
if (set_nonblocking_io(vpx_sock, 0))
rv = TC_ERROR;
#if defined(WIN32) || defined(_WIN32_WCE)
else
WSASetLastError(error);
#endif
}
}
if (bytes_read)
*bytes_read = (total_bytes_read > 0) ? total_bytes_read : 0;
}
return rv;
}
/*
vpx_net_recvfrom(struct vpxsocket* vpx_sock, tc8* buffer, tc32 buf_len,
tc32* bytes_read, union vpx_sockaddr_x* vpx_sa_x)
vpx_sock - pointer to a properly initialized vpxsocket structure
buffer - pointer to a character array where data is to be stored
buf_len - max amount of data to be read
bytes_read - pointer to an integer that will receive the actual amount
of data read or NULL
vpx_sa_from - pointer to a vpx_sockaddr_x union used to store the address
of the remote peer the data was received from or NULL
Attempts to read at most buf_len bytes off the socket into buffer. This
operation can be done on a connected or unconnected socket. If a
read timeout has been set to a non-zero value the operation will fail if
it could not be completed within the specified time. If the send timeout
has been set to 0 the operation will fail if it could not be completed
immediately. If data is received and vpx_sa_from is non-NULL the address
of the sender will be stored in it.
Return:
TC_OK: on success
TC_INVALID_PARAMS: if vpx_sock is NULL, was not properly initialized
via vpx_net_open, buffer is NULL or buf_len is <= 0
TC_TIMEDOUT: if a read timeout has been set to non-zero value and the
operation could not be completed in the specified time
TC_WOULDBLOCK: if the read timeout has been set to 0 and the operation
could not be completed immediately
TC_ERROR: if an error other than timed out or would block is encountered
trying to complete the operation, more information can be
obtained through calling vpx_net_get_error
*/
TCRV vpx_net_recvfrom(struct vpxsocket *vpx_sock, tc8 *buffer, tc32 buf_len,
tc32 *bytes_read, union vpx_sockaddr_x *vpx_sa_from)
{
TCRV rv = TC_INVALID_PARAMS;
if (vpx_sock && (vpx_sock->state & kInited) && buffer && (buf_len > 0))
{
tc32 n = -1;
unsigned int len;
if (vpx_sock->read_timeout_ms)
{
tc32 ret;
fd_set read_fds;
struct timeval tv;
FD_ZERO(&read_fds);
FD_SET(vpx_sock->sock, &read_fds);
if (vpx_sock->read_timeout_ms != vpx_NET_NO_TIMEOUT)
{
tv.tv_sec = 0;
tv.tv_usec = vpx_sock->read_timeout_ms * 1000;
#if !defined(__SYMBIAN32__)
ret = select(vpx_sock->sock + 1, &read_fds, NULL, NULL, &tv);
#else
/*jwz 2005-10-04, symbian seems only to define a blocking select
via ioctl; as the client doesn't currently hit this path I
haven't looked for a replacement*/
ret = -1;
vpxassert(vpx_sock->read_timeout_ms == vpx_NET_NO_TIMEOUT);
#endif
}
else
{
#if !defined(__SYMBIAN32__)
ret = select(vpx_sock->sock + 1, &read_fds, NULL, NULL, NULL);
#else
/*jwz 2005-10-04, symbian seems only to define a blocking select
via ioctl; this select was unnecessary as the socket is set to
blocking.*/
ret = 1;
#endif
}
if (ret > 0)
{
switch (vpx_sock->nl)
{
case vpx_IPv4:
len = sizeof(struct sockaddr_in);
n = recvfrom(vpx_sock->sock, buffer, buf_len, 0,
(struct sockaddr *)&vpx_sock->remote_addr.sa_in, &len);
#if defined(VXWORKS)
vpx_sock->remote_addr.sa_in.sin_family = AF_INET;
#endif
break;
case vpx_IPv6:
#if vpx_NET_SUPPORT_IPV6
len = sizeof(struct sockaddr_in6);
n = recvfrom(vpx_sock->sock, buffer, buf_len, 0,
(struct sockaddr *)&vpx_sock->remote_addr.sa_in6, &len);
#endif
break;
}
if (n == SOCKET_ERROR)
{
if (vpx_sock->tl == vpx_UDP)
{
#if defined(LINUX) || defined(VXWORKS) || defined(__uClinux__)
if (errno == EMSGSIZE)
//n = buf_len;
rv = TC_MSG_TOO_LARGE;
#elif defined(WIN32) || defined(_WIN32_WCE)
if (WSAGetLastError() == WSAEMSGSIZE)
//n = buf_len;
rv = TC_MSG_TOO_LARGE;