CSY/reowolf Files · examples/interop_2_pseudo_socket/main.c

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Initial casting implementation

Explicit casts can be performed with the syntax 'cast<type>(input)'
and implicit casts can be performed with the syntax 'cast(input)'
where the output type is determined by inference.

To prevent casting shenanigans we only allow casting of primitive
types and of types to themselves (essentially creating a copy).

/* This example demonstrates:
- Reowolf's pseudo-socket API mimics the API of UDP sockets
- This example corresponds closely with that of the socket API, differing only in:
    1. an added import of the pseudo-socket header file
    2. (pseudo-)socket operations' identifiers are prefixed with `rw_` (short for "Reowolf"). 
*/
#include <netinet/in.h> // definies socketaddr_in
#include <stdio.h>  // defines printf
#include <stdlib.h> // defines malloc, free
#include <unistd.h> // defines close
#include <arpa/inet.h> // defines inet_addr
#include "../../pseudo_socket.h"
#define BUFSIZE 512
int main() {
    // --- setup ---
    struct sockaddr_in addrs[2]; 
    addrs[0].sin_family = AF_INET;
    addrs[0].sin_port = htons(8000);
    inet_pton(AF_INET, "127.0.0.1", &addrs[0].sin_addr.s_addr);
    addrs[1].sin_family = AF_INET;
    addrs[1].sin_port = htons(8001);
    inet_pton(AF_INET, "127.0.0.1", &addrs[1].sin_addr.s_addr);
    int fd = rw_socket(AF_INET, SOCK_DGRAM, 0); 
    rw_bind(fd, (const struct sockaddr *)&addrs[0], sizeof(addrs[0]));
    rw_connect(fd, (const struct sockaddr *)&addrs[1], sizeof(addrs[1]));
    // --- communication ---
    char * buffer = malloc(BUFSIZE);
    size_t msglen, i;
    msglen = rw_recv(fd, (void *)buffer, BUFSIZE, 0);
    for(i=0; i<msglen; i++) {
        printf("%02X", buffer[i]);
    }
    // --- cleanup ---
    rw_close(fd);
    free(buffer);
    return 0;
}