mirror of
https://github.com/lsalzman/enet
synced 2024-11-21 14:29:05 -07:00
514 lines
11 KiB
C
514 lines
11 KiB
C
/**
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@file unix.c
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@brief ENet Unix system specific functions
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*/
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#ifndef WIN32
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#include <sys/time.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <time.h>
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#define ENET_BUILDING_LIB 1
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#include "enet/enet.h"
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#ifdef __APPLE__
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#ifdef HAS_POLL
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#undef HAS_POLL
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#endif
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#ifndef HAS_FCNTL
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#define HAS_FCNTL 1
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#endif
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#ifndef HAS_INET_PTON
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#define HAS_INET_PTON 1
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#endif
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#ifndef HAS_INET_NTOP
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#define HAS_INET_NTOP 1
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#endif
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#ifndef HAS_MSGHDR_FLAGS
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#define HAS_MSGHDR_FLAGS 1
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#endif
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#ifndef HAS_SOCKLEN_T
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#define HAS_SOCKLEN_T 1
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#endif
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#endif
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#ifdef HAS_FCNTL
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#include <fcntl.h>
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#endif
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#ifdef HAS_POLL
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#include <sys/poll.h>
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#endif
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#ifndef HAS_SOCKLEN_T
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typedef int socklen_t;
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#endif
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#ifndef MSG_NOSIGNAL
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#define MSG_NOSIGNAL 0
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#endif
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static enet_uint32 timeBase = 0;
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int
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enet_initialize (void)
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{
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return 0;
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}
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void
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enet_deinitialize (void)
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{
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}
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enet_uint32
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enet_host_random_seed (void)
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{
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return (enet_uint32) time (NULL);
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}
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enet_uint32
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enet_time_get (void)
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{
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struct timeval timeVal;
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gettimeofday (& timeVal, NULL);
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return timeVal.tv_sec * 1000 + timeVal.tv_usec / 1000 - timeBase;
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}
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void
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enet_time_set (enet_uint32 newTimeBase)
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{
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struct timeval timeVal;
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gettimeofday (& timeVal, NULL);
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timeBase = timeVal.tv_sec * 1000 + timeVal.tv_usec / 1000 - newTimeBase;
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}
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int
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enet_address_set_host (ENetAddress * address, const char * name)
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{
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struct hostent * hostEntry = NULL;
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#ifdef HAS_GETHOSTBYNAME_R
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struct hostent hostData;
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char buffer [2048];
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int errnum;
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#if defined(linux) || defined(__linux) || defined(__linux__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
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gethostbyname_r (name, & hostData, buffer, sizeof (buffer), & hostEntry, & errnum);
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#else
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hostEntry = gethostbyname_r (name, & hostData, buffer, sizeof (buffer), & errnum);
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#endif
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#else
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hostEntry = gethostbyname (name);
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#endif
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if (hostEntry == NULL ||
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hostEntry -> h_addrtype != AF_INET)
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{
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#ifdef HAS_INET_PTON
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if (! inet_pton (AF_INET, name, & address -> host))
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#else
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if (! inet_aton (name, (struct in_addr *) & address -> host))
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#endif
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return -1;
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return 0;
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}
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address -> host = * (enet_uint32 *) hostEntry -> h_addr_list [0];
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return 0;
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}
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int
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enet_address_get_host_ip (const ENetAddress * address, char * name, size_t nameLength)
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{
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#ifdef HAS_INET_NTOP
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if (inet_ntop (AF_INET, & address -> host, name, nameLength) == NULL)
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#else
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char * addr = inet_ntoa (* (struct in_addr *) & address -> host);
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if (addr != NULL)
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strncpy (name, addr, nameLength);
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else
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#endif
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return -1;
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return 0;
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}
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int
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enet_address_get_host (const ENetAddress * address, char * name, size_t nameLength)
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{
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struct in_addr in;
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struct hostent * hostEntry = NULL;
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#ifdef HAS_GETHOSTBYADDR_R
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struct hostent hostData;
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char buffer [2048];
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int errnum;
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in.s_addr = address -> host;
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#if defined(linux) || defined(__linux) || defined(__linux__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
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gethostbyaddr_r ((char *) & in, sizeof (struct in_addr), AF_INET, & hostData, buffer, sizeof (buffer), & hostEntry, & errnum);
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#else
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hostEntry = gethostbyaddr_r ((char *) & in, sizeof (struct in_addr), AF_INET, & hostData, buffer, sizeof (buffer), & errnum);
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#endif
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#else
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in.s_addr = address -> host;
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hostEntry = gethostbyaddr ((char *) & in, sizeof (struct in_addr), AF_INET);
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#endif
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if (hostEntry == NULL)
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return enet_address_get_host_ip (address, name, nameLength);
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strncpy (name, hostEntry -> h_name, nameLength);
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return 0;
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}
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int
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enet_socket_bind (ENetSocket socket, const ENetAddress * address)
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{
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struct sockaddr_in sin;
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memset (& sin, 0, sizeof (struct sockaddr_in));
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sin.sin_family = AF_INET;
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if (address != NULL)
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{
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sin.sin_port = ENET_HOST_TO_NET_16 (address -> port);
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sin.sin_addr.s_addr = address -> host;
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}
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else
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{
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sin.sin_port = 0;
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sin.sin_addr.s_addr = INADDR_ANY;
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}
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return bind (socket,
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(struct sockaddr *) & sin,
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sizeof (struct sockaddr_in));
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}
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int
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enet_socket_get_address (ENetSocket socket, ENetAddress * address)
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{
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struct sockaddr_in sin;
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socklen_t sinLength = sizeof (struct sockaddr_in);
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if (getsockname (socket, (struct sockaddr *) & sin, & sinLength) == -1)
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return -1;
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address -> host = (enet_uint32) sin.sin_addr.s_addr;
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address -> port = ENET_NET_TO_HOST_16 (sin.sin_port);
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return 0;
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}
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int
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enet_socket_listen (ENetSocket socket, int backlog)
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{
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return listen (socket, backlog < 0 ? SOMAXCONN : backlog);
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}
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ENetSocket
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enet_socket_create (ENetSocketType type)
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{
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return socket (PF_INET, type == ENET_SOCKET_TYPE_DATAGRAM ? SOCK_DGRAM : SOCK_STREAM, 0);
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}
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int
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enet_socket_set_option (ENetSocket socket, ENetSocketOption option, int value)
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{
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int result = -1;
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switch (option)
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{
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case ENET_SOCKOPT_NONBLOCK:
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#ifdef HAS_FCNTL
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result = fcntl (socket, F_SETFL, O_NONBLOCK | fcntl (socket, F_GETFL));
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#else
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result = ioctl (socket, FIONBIO, & value);
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#endif
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break;
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case ENET_SOCKOPT_BROADCAST:
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result = setsockopt (socket, SOL_SOCKET, SO_BROADCAST, (char *) & value, sizeof (int));
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break;
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case ENET_SOCKOPT_REUSEADDR:
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result = setsockopt (socket, SOL_SOCKET, SO_REUSEADDR, (char *) & value, sizeof (int));
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break;
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case ENET_SOCKOPT_RCVBUF:
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result = setsockopt (socket, SOL_SOCKET, SO_RCVBUF, (char *) & value, sizeof (int));
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break;
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case ENET_SOCKOPT_SNDBUF:
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result = setsockopt (socket, SOL_SOCKET, SO_SNDBUF, (char *) & value, sizeof (int));
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break;
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case ENET_SOCKOPT_RCVTIMEO:
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result = setsockopt (socket, SOL_SOCKET, SO_RCVTIMEO, (char *) & value, sizeof (int));
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break;
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case ENET_SOCKOPT_SNDTIMEO:
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result = setsockopt (socket, SOL_SOCKET, SO_SNDTIMEO, (char *) & value, sizeof (int));
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break;
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default:
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break;
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}
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return result == -1 ? -1 : 0;
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}
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int
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enet_socket_connect (ENetSocket socket, const ENetAddress * address)
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{
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struct sockaddr_in sin;
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int result;
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memset (& sin, 0, sizeof (struct sockaddr_in));
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sin.sin_family = AF_INET;
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sin.sin_port = ENET_HOST_TO_NET_16 (address -> port);
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sin.sin_addr.s_addr = address -> host;
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result = connect (socket, (struct sockaddr *) & sin, sizeof (struct sockaddr_in));
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if (result == -1 && errno == EINPROGRESS)
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return 0;
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return result;
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}
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ENetSocket
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enet_socket_accept (ENetSocket socket, ENetAddress * address)
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{
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int result;
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struct sockaddr_in sin;
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socklen_t sinLength = sizeof (struct sockaddr_in);
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result = accept (socket,
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address != NULL ? (struct sockaddr *) & sin : NULL,
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address != NULL ? & sinLength : NULL);
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if (result == -1)
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return ENET_SOCKET_NULL;
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if (address != NULL)
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{
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address -> host = (enet_uint32) sin.sin_addr.s_addr;
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address -> port = ENET_NET_TO_HOST_16 (sin.sin_port);
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}
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return result;
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}
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int
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enet_socket_shutdown (ENetSocket socket, ENetSocketShutdown how)
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{
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return shutdown (socket, (int) how);
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}
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void
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enet_socket_destroy (ENetSocket socket)
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{
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if (socket != -1)
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close (socket);
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}
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int
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enet_socket_send (ENetSocket socket,
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const ENetAddress * address,
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const ENetBuffer * buffers,
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size_t bufferCount)
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{
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struct msghdr msgHdr;
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struct sockaddr_in sin;
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int sentLength;
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memset (& msgHdr, 0, sizeof (struct msghdr));
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if (address != NULL)
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{
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memset (& sin, 0, sizeof (struct sockaddr_in));
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sin.sin_family = AF_INET;
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sin.sin_port = ENET_HOST_TO_NET_16 (address -> port);
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sin.sin_addr.s_addr = address -> host;
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msgHdr.msg_name = & sin;
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msgHdr.msg_namelen = sizeof (struct sockaddr_in);
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}
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msgHdr.msg_iov = (struct iovec *) buffers;
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msgHdr.msg_iovlen = bufferCount;
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sentLength = sendmsg (socket, & msgHdr, MSG_NOSIGNAL);
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if (sentLength == -1)
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{
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if (errno == EWOULDBLOCK)
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return 0;
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return -1;
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}
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return sentLength;
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}
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int
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enet_socket_receive (ENetSocket socket,
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ENetAddress * address,
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ENetBuffer * buffers,
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size_t bufferCount)
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{
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struct msghdr msgHdr;
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struct sockaddr_in sin;
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int recvLength;
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memset (& msgHdr, 0, sizeof (struct msghdr));
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if (address != NULL)
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{
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msgHdr.msg_name = & sin;
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msgHdr.msg_namelen = sizeof (struct sockaddr_in);
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}
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msgHdr.msg_iov = (struct iovec *) buffers;
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msgHdr.msg_iovlen = bufferCount;
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recvLength = recvmsg (socket, & msgHdr, MSG_NOSIGNAL);
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if (recvLength == -1)
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{
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if (errno == EWOULDBLOCK)
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return 0;
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return -1;
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}
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#ifdef HAS_MSGHDR_FLAGS
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if (msgHdr.msg_flags & MSG_TRUNC)
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return -1;
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#endif
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if (address != NULL)
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{
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address -> host = (enet_uint32) sin.sin_addr.s_addr;
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address -> port = ENET_NET_TO_HOST_16 (sin.sin_port);
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}
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return recvLength;
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}
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int
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enet_socketset_select (ENetSocket maxSocket, ENetSocketSet * readSet, ENetSocketSet * writeSet, enet_uint32 timeout)
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{
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struct timeval timeVal;
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timeVal.tv_sec = timeout / 1000;
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timeVal.tv_usec = (timeout % 1000) * 1000;
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return select (maxSocket + 1, readSet, writeSet, NULL, & timeVal);
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}
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int
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enet_socket_wait (ENetSocket socket, enet_uint32 * condition, enet_uint32 timeout)
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{
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#ifdef HAS_POLL
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struct pollfd pollSocket;
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int pollCount;
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pollSocket.fd = socket;
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pollSocket.events = 0;
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if (* condition & ENET_SOCKET_WAIT_SEND)
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pollSocket.events |= POLLOUT;
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if (* condition & ENET_SOCKET_WAIT_RECEIVE)
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pollSocket.events |= POLLIN;
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pollCount = poll (& pollSocket, 1, timeout);
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if (pollCount < 0)
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{
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if (errno == EINTR && * condition & ENET_SOCKET_WAIT_INTERRUPT)
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{
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* condition = ENET_SOCKET_WAIT_INTERRUPT;
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return 0;
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}
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return -1;
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}
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* condition = ENET_SOCKET_WAIT_NONE;
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if (pollCount == 0)
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return 0;
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if (pollSocket.revents & POLLOUT)
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* condition |= ENET_SOCKET_WAIT_SEND;
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if (pollSocket.revents & POLLIN)
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* condition |= ENET_SOCKET_WAIT_RECEIVE;
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return 0;
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#else
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fd_set readSet, writeSet;
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struct timeval timeVal;
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int selectCount;
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timeVal.tv_sec = timeout / 1000;
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timeVal.tv_usec = (timeout % 1000) * 1000;
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FD_ZERO (& readSet);
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FD_ZERO (& writeSet);
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if (* condition & ENET_SOCKET_WAIT_SEND)
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FD_SET (socket, & writeSet);
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if (* condition & ENET_SOCKET_WAIT_RECEIVE)
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FD_SET (socket, & readSet);
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selectCount = select (socket + 1, & readSet, & writeSet, NULL, & timeVal);
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if (selectCount < 0)
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{
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if (errno == EINTR && * condition & ENET_SOCKET_WAIT_INTERRUPT)
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{
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* condition = ENET_SOCKET_WAIT_INTERRUPT;
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return 0;
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}
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return -1;
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}
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* condition = ENET_SOCKET_WAIT_NONE;
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if (selectCount == 0)
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return 0;
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if (FD_ISSET (socket, & writeSet))
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* condition |= ENET_SOCKET_WAIT_SEND;
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if (FD_ISSET (socket, & readSet))
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* condition |= ENET_SOCKET_WAIT_RECEIVE;
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return 0;
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#endif
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}
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#endif
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