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#include "socket.h"
#include "log.h"
#include <string.h>
#include <stdio.h>
#include <assert.h>
#if defined(_WIN32)
static int InitializeWsa()
{
WSADATA wsa;
int rc;
if ((rc = WSAStartup(MAKEWORD(2, 2), &wsa)) != 0)
{
LOG_ERROR("WSAStartup failed: %d", rc);
return -1;
}
return 0;
}
#define close closesocket
#endif
int SocketConnect(const char *host, short port, int nonblocking)
{
struct addrinfo hints, *servinfo = NULL, *p = NULL;
int rv;
char portstr[6];
int sock;
#if defined(_WIN32)
if (InitializeWsa() != 0)
{
return -1;
}
#endif
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
assert(snprintf(portstr, sizeof(portstr), "%hu", port) < (int) sizeof(portstr));
if ((rv = getaddrinfo(host, portstr, &hints, &servinfo)) != 0)
{
goto cleanup;
}
for (p = servinfo; p != NULL; p = p->ai_next)
{
if ((sock = socket(p->ai_family, p->ai_socktype,
p->ai_protocol)) == -1)
{
continue;
}
if (nonblocking)
{
SocketSetNonblocking(sock, 1);
}
if (connect(sock, p->ai_addr, p->ai_addrlen) == -1)
{
int err = SocketErrno;
if (err == SOCKET_EINPROGRESS)
break;
close(sock);
continue;
}
break;
}
cleanup:
if (servinfo)
{
freeaddrinfo(servinfo);
}
if (p == NULL)
{
#if defined(_WIN32)
WSACleanup();
#endif
return -1;
}
return sock;
}
int SocketDisconnect(int sock)
{
int rc = close(sock);
#if defined(_WIN32)
WSACleanup();
#endif
return rc;
}
int64_t SocketRecv(int sock, void *buf, size_t len, int flags)
{
return recv(sock, buf, len, flags);
}
int64_t SocketSend(int sock, const void *buf, size_t len, int flags)
{
return send(sock, buf, len, flags);
}
int SocketSendAll(int sock, const char *buf, size_t *len)
{
size_t total = 0;
int rv;
size_t remaining = *len;
while (remaining > 0)
{
if ((rv = send(sock, buf+total, remaining, 0)) == -1)
{
break;
}
total += rv;
remaining -= rv;
}
*len = total;
return rv == -1 ? -1 : 0;
}
int SocketSelect(int sock, int *events, int timeout)
{
fd_set rfd, wfd;
struct timeval tv;
int rv;
assert(sock != -1);
assert(events != NULL);
assert(*events != 0);
FD_ZERO(&rfd);
FD_ZERO(&wfd);
if (*events & EV_READ)
{
FD_SET(sock, &rfd);
}
if (*events & EV_WRITE)
{
FD_SET(sock, &wfd);
}
memset(&tv, 0, sizeof(tv));
tv.tv_sec = timeout / 1000;
tv.tv_usec = (timeout - (tv.tv_sec * 1000)) * 1000;
*events = 0;
rv = select(sock+1, &rfd, &wfd, NULL, &tv);
if (rv < 0)
{
return rv;
}
if (FD_ISSET(sock, &wfd))
{
*events = EV_WRITE;
}
if (FD_ISSET(sock, &rfd))
{
*events = EV_READ;
}
return rv;
}
void SocketSetNonblocking(int sock, int nb)
{
#if defined(_WIN32)
unsigned int yes = nb;
ioctlsocket(s, FIONBIO, &yes);
#else
int flags = fcntl(sock, F_GETFL, 0);
if (nb)
flags |= O_NONBLOCK;
else
flags &= ~O_NONBLOCK;
fcntl(sock, F_SETFL, flags);
#endif
}
int SocketGetOpt(int sock, int level, int name, void *val, int *len)
{
#if defined(_WIN32)
return getsockopt(sock, level, name, (char *) val, len);
#else
socklen_t _len = *len;
int rc = getsockopt(sock, level, name, val, &_len);
*len = _len;
return rc;
#endif
}
int SocketGetError(int sock, int *error)
{
int len = sizeof(*error);
return SocketGetOpt(sock, SOL_SOCKET, SO_ERROR, error, &len);
}
int SocketWouldBlock(int error)
{
#if defined(_WIN32)
return error == WSAEWOULDBLOCK;
#else
return error == EWOULDBLOCK || error == EAGAIN;
#endif
}
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