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add zed_net

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Green Sky 2022-12-16 17:18:29 +01:00
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14
external/zed_net/CMakeLists.txt vendored Normal file
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cmake_minimum_required(VERSION 3.8 FATAL_ERROR)
add_library(zed_net
./zed_net.h
./zed_net.c
)
target_include_directories(zed_net PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}")
if(WIN32)
#target_link_libraries(zed_net ws2_32 iphlpapi)
target_link_libraries(zed_net ws2_32)
endif()

4
external/zed_net/zed_net.c vendored Normal file
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#define ZED_NET_IMPLEMENTATION 1
#include "./zed_net.h"

567
external/zed_net/zed_net.h vendored Normal file
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/////////////////////////////////////////////////////////////////////////////////////////
//
// zed_net - v0.21 - public domain networking library
// (inspired by the excellent stb libraries: https://github.com/nothings/stb)
//
// This library is intended primarily for use in games and provides a simple wrapper
// around BSD sockets (Winsock 2.2 on Windows). Sockets can be set to be blocking or
// non-blocking.
//
// Only UDP sockets are supported at this time, but this may later expand to include TCP.
//
// VERSION HISTORY
//
// 0.21 (14/01/2021) Win compilation fixes.
// 0.20 (7/28/2019) OSX compilation fixes.
// 0.19 (3/4/2016) TCP added and malloc/free calls removed.
// Not backwards compatible. - Ian T. Jacobsen (itjac.me)
// 0.18 (9/13/2015) minor polishing
// 0.17 (8/8/2015) initial release
//
// LICENSE
//
// This software is in the public domain. Where that dedication is not recognized, you
// are granted a perpetual, irrevocable license to copy, distribute, and modify this
// file as you see fit.
//
// USAGE
//
// #define the symbol ZED_NET_IMPLEMENTATION in *one* C/C++ file before the #include
// of this file; the implementation will be generated in that file.
//
// If you define the symbol ZED_NET_STATIC, then the implementation will be private to
// that file.
//
// Immediately after this block comment is the "header file" section. This section
// includes documentation for each API function.
//
#ifndef INCLUDE_ZED_NET_H
#define INCLUDE_ZED_NET_H
#ifdef ZED_NET_STATIC
#define ZED_NET_DEF static
#else
#define ZED_NET_DEF extern
#endif
#ifdef __cplusplus
extern "C" {
#endif
/////////////////////////////////////////////////////////////////////////////////////////
//
// INITIALIZATION AND SHUTDOWN
//
// Get a brief reason for failure
ZED_NET_DEF const char *zed_net_get_error(void);
// Perform platform-specific socket initialization;
// *must* be called before using any other function
//
// Returns 0 on success, -1 otherwise (call 'zed_net_get_error' for more info)
ZED_NET_DEF int zed_net_init(void);
// Perform platform-specific socket de-initialization;
// *must* be called when finished using the other functions
ZED_NET_DEF void zed_net_shutdown(void);
/////////////////////////////////////////////////////////////////////////////////////////
//
// INTERNET ADDRESS API
//
// Represents an internet address usable by sockets
typedef struct {
unsigned int host;
unsigned short port;
} zed_net_address_t;
// Obtain an address from a host name and a port
//
// 'host' may contain a decimal formatted IP (such as "127.0.0.1"), a human readable
// name (such as "localhost"), or NULL for the default address
//
// Returns 0 on success, -1 otherwise (call 'zed_net_get_error' for more info)
ZED_NET_DEF int zed_net_get_address(zed_net_address_t *address, const char *host, unsigned short port);
// Converts an address's host name into a decimal formatted string
//
// Returns NULL on failure (call 'zed_net_get_error' for more info)
ZED_NET_DEF const char *zed_net_host_to_str(unsigned int host);
/////////////////////////////////////////////////////////////////////////////////////////
//
// SOCKET HANDLE API
//
// Wraps the system handle for a UDP/TCP socket
typedef struct {
int handle;
unsigned long non_blocking;
int ready;
} zed_net_socket_t;
// Closes a previously opened socket
ZED_NET_DEF void zed_net_socket_close(zed_net_socket_t *socket);
/////////////////////////////////////////////////////////////////////////////////////////
//
// UDP SOCKETS API
//
// Opens a UDP socket and binds it to a specified port
// (use 0 to select a random open port)
//
// Socket will not block if 'non-blocking' is non-zero
//
// Returns 0 on success
// Returns -1 on failure (call 'zed_net_get_error' for more info)
ZED_NET_DEF int zed_net_udp_socket_open(zed_net_socket_t *socket, unsigned int port, unsigned long non_blocking);
// Sends a specific amount of data to 'destination'
//
// Returns 0 on success, -1 otherwise (call 'zed_net_get_error' for more info)
ZED_NET_DEF int zed_net_udp_socket_send(zed_net_socket_t *socket, zed_net_address_t destination, const void *data, int size);
// Receives a specific amount of data from 'sender'
//
// Returns the number of bytes received, -1 otherwise (call 'zed_net_get_error' for more info)
ZED_NET_DEF int zed_net_udp_socket_receive(zed_net_socket_t *socket, zed_net_address_t *sender, void *data, int size);
/////////////////////////////////////////////////////////////////////////////////////////
//
// TCP SOCKETS API
//
// Opens a TCP socket and binds it to a specified port
// (use 0 to select a random open port)
//
// Socket will not block if 'non-blocking' is non-zero
//
// Returns NULL on failure (call 'zed_net_get_error' for more info)
// Socket will listen for incoming connections if 'listen_socket' is non-zero
// Returns 0 on success
// Returns -1 on failure (call 'zed_net_get_error' for more info)
ZED_NET_DEF int zed_net_tcp_socket_open(zed_net_socket_t *socket, unsigned int port, unsigned long non_blocking, int listen_socket);
// Connect to a remote endpoint
// Returns 0 on success.
// if the socket is non-blocking, then this can return 1 if the socket isn't ready
// returns -1 otherwise. (call 'zed_net_get_error' for more info)
ZED_NET_DEF int zed_net_tcp_connect(zed_net_socket_t *socket, zed_net_address_t remote_addr);
// Accept connection
// New remote_socket inherits non-blocking from listening_socket
// Returns 0 on success.
// if the socket is non-blocking, then this can return 1 if the socket isn't ready
// if the socket is non_blocking and there was no connection to accept, returns 2
// returns -1 otherwise. (call 'zed_net_get_error' for more info)
ZED_NET_DEF int zed_net_tcp_accept(zed_net_socket_t *listening_socket, zed_net_socket_t *remote_socket, zed_net_address_t *remote_addr);
// Returns 0 on success.
// if the socket is non-blocking, then this can return 1 if the socket isn't ready
// returns -1 otherwise. (call 'zed_net_get_error' for more info)
ZED_NET_DEF int zed_net_tcp_socket_send(zed_net_socket_t *remote_socket, const void *data, int size);
// Returns 0 on success.
// if the socket is non-blocking, then this can return 1 if the socket isn't ready
// returns -1 otherwise. (call 'zed_net_get_error' for more info)
ZED_NET_DEF int zed_net_tcp_socket_receive(zed_net_socket_t *remote_socket, void *data, int size);
// Blocks until the TCP socket is ready. Only makes sense for non-blocking socket.
// Returns 0 on success.
// returns -1 otherwise. (call 'zed_net_get_error' for more info)
ZED_NET_DEF int zed_net_tcp_make_socket_ready(zed_net_socket_t *socket);
#ifdef __cplusplus
}
#endif
#endif // INCLUDE_ZED_NET_H
#ifdef ZED_NET_IMPLEMENTATION
#include <stdlib.h>
#include <string.h>
#include <time.h>
#ifdef _WIN32
#define _WINSOCK_DEPRECATED_NO_WARNINGS
//#include <WinSock2.h>
#include <winsock2.h>
#pragma comment(lib, "wsock32.lib")
#define ZED_NET_SOCKET_ERROR SOCKET_ERROR
#define ZED_NET_INVALID_SOCKET INVALID_SOCKET
#else
#include <sys/socket.h>
#include <unistd.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <fcntl.h>
#define ZED_NET_SOCKET_ERROR -1
#define ZED_NET_INVALID_SOCKET -1
#endif
static const char *zed_net__g_error;
static int zed_net__error(const char *message) {
zed_net__g_error = message;
return -1;
}
ZED_NET_DEF const char *zed_net_get_error(void) {
return zed_net__g_error;
}
ZED_NET_DEF int zed_net_init(void) {
#ifdef _WIN32
WSADATA wsa_data;
if (WSAStartup(MAKEWORD(2, 2), &wsa_data) != 0)
{
return zed_net__error("Windows Sockets failed to start");
}
return 0;
#else
return 0;
#endif
}
ZED_NET_DEF void zed_net_shutdown(void) {
#ifdef _WIN32
WSACleanup();
#endif
}
ZED_NET_DEF int zed_net_get_address(zed_net_address_t *address, const char *host, unsigned short port) {
if (host == NULL) {
address->host = INADDR_ANY;
} else {
address->host = inet_addr(host);
if (address->host == INADDR_NONE) {
struct hostent *hostent = gethostbyname(host);
if (hostent) {
memcpy(&address->host, hostent->h_addr, hostent->h_length);
} else {
return zed_net__error("Invalid host name");
}
}
}
address->port = port;
return 0;
}
ZED_NET_DEF const char *zed_net_host_to_str(unsigned int host) {
struct in_addr in;
in.s_addr = host;
return inet_ntoa(in);
}
ZED_NET_DEF int zed_net_udp_socket_open(zed_net_socket_t *sock, unsigned int port, unsigned long non_blocking) {
if (!sock)
return zed_net__error("Socket is NULL");
// Create the socket
sock->handle = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if (sock->handle <= 0) {
zed_net_socket_close(sock);
return zed_net__error("Failed to create socket");
}
// Bind the socket to the port
struct sockaddr_in address;
address.sin_family = AF_INET;
address.sin_addr.s_addr = INADDR_ANY;
address.sin_port = htons(port);
if (bind(sock->handle, (const struct sockaddr *) &address, sizeof(struct sockaddr_in)) != 0) {
zed_net_socket_close(sock);
return zed_net__error("Failed to bind socket");
}
// Set the socket to non-blocking if neccessary
if (non_blocking) {
#ifdef _WIN32
if (ioctlsocket(sock->handle, FIONBIO, &non_blocking) != 0) {
zed_net_socket_close(sock);
return zed_net__error("Failed to set socket to non-blocking");
}
#else
if (fcntl(sock->handle, F_SETFL, O_NONBLOCK, non_blocking) != 0) {
zed_net_socket_close(sock);
return zed_net__error("Failed to set socket to non-blocking");
}
#endif
}
sock->non_blocking = non_blocking;
return 0;
}
ZED_NET_DEF int zed_net_tcp_socket_open(zed_net_socket_t *sock, unsigned int port, unsigned long non_blocking, int listen_socket) {
if (!sock)
return zed_net__error("Socket is NULL");
// Create the socket
sock->handle = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (sock->handle <= 0) {
zed_net_socket_close(sock);
return zed_net__error("Failed to create socket");
}
// Bind the socket to the port
struct sockaddr_in address;
address.sin_family = AF_INET;
address.sin_addr.s_addr = INADDR_ANY;
address.sin_port = htons(port);
if (bind(sock->handle, (const struct sockaddr *) &address, sizeof(struct sockaddr_in)) != 0) {
zed_net_socket_close(sock);
return zed_net__error("Failed to bind socket");
}
// Set the socket to non-blocking if neccessary
if (non_blocking) {
#ifdef _WIN32
if (ioctlsocket(sock->handle, FIONBIO, &non_blocking) != 0) {
zed_net_socket_close(sock);
return zed_net__error("Failed to set socket to non-blocking");
}
#else
if (fcntl(sock->handle, F_SETFL, O_NONBLOCK, non_blocking) != 0) {
zed_net_socket_close(sock);
return zed_net__error("Failed to set socket to non-blocking");
}
#endif
sock->ready = 0;
}
if (listen_socket) {
#ifndef SOMAXCONN
#define SOMAXCONN 10
#endif
if (listen(sock->handle, SOMAXCONN) != 0) {
zed_net_socket_close(sock);
return zed_net__error("Failed make socket listen");
}
}
sock->non_blocking = non_blocking;
return 0;
}
// Returns 1 if it would block, <0 if there's an error.
ZED_NET_DEF int zed_net_check_would_block(zed_net_socket_t *socket) {
struct timeval timer;
fd_set writefd;
int retval;
if (socket->non_blocking && !socket->ready) {
FD_ZERO(&writefd);
FD_SET(socket->handle, &writefd);
timer.tv_sec = 0;
timer.tv_usec = 0;
retval = select(0, NULL, &writefd, NULL, &timer);
if (retval == 0)
return 1;
else if (retval == ZED_NET_SOCKET_ERROR) {
zed_net_socket_close(socket);
return zed_net__error("Got socket error from select()");
}
socket->ready = 1;
}
return 0;
}
ZED_NET_DEF int zed_net_tcp_make_socket_ready(zed_net_socket_t *socket) {
if (!socket->non_blocking)
return 0;
if (socket->ready)
return 0;
fd_set writefd;
int retval;
FD_ZERO(&writefd);
FD_SET(socket->handle, &writefd);
retval = select(0, NULL, &writefd, NULL, NULL);
if (retval != 1)
return zed_net__error("Failed to make non-blocking socket ready");
socket->ready = 1;
return 0;
}
ZED_NET_DEF int zed_net_tcp_connect(zed_net_socket_t *socket, zed_net_address_t remote_addr) {
struct sockaddr_in address;
int retval;
if (!socket)
return zed_net__error("Socket is NULL");
retval = zed_net_check_would_block(socket);
if (retval == 1)
return 1;
else if (retval)
return -1;
address.sin_family = AF_INET;
address.sin_addr.s_addr = remote_addr.host;
address.sin_port = htons(remote_addr.port);
retval = connect(socket->handle, (const struct sockaddr *) &address, sizeof(address));
if (retval == ZED_NET_SOCKET_ERROR) {
zed_net_socket_close(socket);
return zed_net__error("Failed to connect socket");
}
return 0;
}
ZED_NET_DEF int zed_net_tcp_accept(zed_net_socket_t *listening_socket, zed_net_socket_t *remote_socket, zed_net_address_t *remote_addr) {
struct sockaddr_in address;
int retval, handle;
if (!listening_socket)
return zed_net__error("Listening socket is NULL");
if (!remote_socket)
return zed_net__error("Remote socket is NULL");
if (!remote_addr)
return zed_net__error("Address pointer is NULL");
retval = zed_net_check_would_block(listening_socket);
if (retval == 1)
return 1;
else if (retval)
return -1;
#ifdef _WIN32
typedef int socklen_t;
#endif
socklen_t addrlen = sizeof(address);
handle = accept(listening_socket->handle, (struct sockaddr *)&address, &addrlen);
if (handle == ZED_NET_INVALID_SOCKET)
return 2;
remote_addr->host = address.sin_addr.s_addr;
remote_addr->port = ntohs(address.sin_port);
remote_socket->non_blocking = listening_socket->non_blocking;
remote_socket->ready = 0;
remote_socket->handle = handle;
return 0;
}
ZED_NET_DEF void zed_net_socket_close(zed_net_socket_t *socket) {
if (!socket) {
return;
}
if (socket->handle) {
#ifdef _WIN32
closesocket(socket->handle);
#else
close(socket->handle);
#endif
}
}
ZED_NET_DEF int zed_net_udp_socket_send(zed_net_socket_t *socket, zed_net_address_t destination, const void *data, int size) {
if (!socket) {
return zed_net__error("Socket is NULL");
}
struct sockaddr_in address;
address.sin_family = AF_INET;
address.sin_addr.s_addr = destination.host;
address.sin_port = htons(destination.port);
int sent_bytes = sendto(socket->handle, (const char *) data, size, 0, (const struct sockaddr *) &address, sizeof(struct sockaddr_in));
if (sent_bytes != size) {
return zed_net__error("Failed to send data");
}
return 0;
}
ZED_NET_DEF int zed_net_udp_socket_receive(zed_net_socket_t *socket, zed_net_address_t *sender, void *data, int size) {
if (!socket) {
return zed_net__error("Socket is NULL");
}
#ifdef _WIN32
typedef int socklen_t;
#endif
struct sockaddr_in from;
socklen_t from_length = sizeof(from);
int received_bytes = recvfrom(socket->handle, (char *) data, size, 0, (struct sockaddr *) &from, &from_length);
if (received_bytes <= 0) {
return 0;
}
sender->host = from.sin_addr.s_addr;
sender->port = ntohs(from.sin_port);
return received_bytes;
}
ZED_NET_DEF int zed_net_tcp_socket_send(zed_net_socket_t *remote_socket, const void *data, int size) {
int retval;
if (!remote_socket) {
return zed_net__error("Socket is NULL");
}
retval = zed_net_check_would_block(remote_socket);
if (retval == 1)
return 1;
else if (retval)
return -1;
int sent_bytes = send(remote_socket->handle, (const char *) data, size, 0);
if (sent_bytes != size) {
return zed_net__error("Failed to send data");
}
return 0;
}
ZED_NET_DEF int zed_net_tcp_socket_receive(zed_net_socket_t *remote_socket, void *data, int size) {
int retval;
if (!remote_socket) {
return zed_net__error("Socket is NULL");
}
retval = zed_net_check_would_block(remote_socket);
if (retval == 1)
return 1;
else if (retval)
return -1;
#ifdef _WIN32
typedef int socklen_t;
#endif
int received_bytes = recv(remote_socket->handle, (char *) data, size, 0);
if (received_bytes <= 0) {
return 0;
}
return received_bytes;
}
#endif // ZED_NET_IMPLEMENTATION
// vim: tabstop=4 shiftwidth=4 expandtab