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Location: CSY/reowolf/examples/interop_1_socket/main.c - annotation
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Add docs for implementing infinite types in a value based language.
Since we are a value based language and do not have the concept of
pointers, then if we want to lay out the memory of datatypes we run
into a problem when the types represent recursive datastructures:
these are infinite in size. So we have an algorithm for turning
some types into pointer-like things, such that we can lay everything
out in memory.
Since we are a value based language and do not have the concept of
pointers, then if we want to lay out the memory of datatypes we run
into a problem when the types represent recursive datastructures:
these are infinite in size. So we have an algorithm for turning
some types into pointer-like things, such that we can lay everything
out in memory.
673882671c9a 673882671c9a 673882671c9a 673882671c9a 673882671c9a 8df425c3752e 8df425c3752e 8df425c3752e 8df425c3752e 90965e662451 a9fb2e3e41d9 a9fb2e3e41d9 a9fb2e3e41d9 8df425c3752e 90965e662451 90965e662451 90965e662451 90965e662451 90965e662451 90965e662451 a9fb2e3e41d9 8df425c3752e 8df425c3752e a9fb2e3e41d9 8df425c3752e a9fb2e3e41d9 8df425c3752e a9fb2e3e41d9 a9fb2e3e41d9 a9fb2e3e41d9 a9fb2e3e41d9 a9fb2e3e41d9 a9fb2e3e41d9 a9fb2e3e41d9 8df425c3752e | /* This example demonstrates:
- conventional UDP socket API can be used in a connection-oriented fashion
- first setup with `bind` and `connect`
- henceforth communicating with connected peer using `send` and `recv` in blocking mode.
*/
#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
#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 = socket(AF_INET, SOCK_DGRAM, 0);
bind(fd, (const struct sockaddr *)&addrs[0], sizeof(addrs[0]));
connect(fd, (const struct sockaddr *)&addrs[1], sizeof(addrs[1]));
// --- communication ---
char * buffer = malloc(BUFSIZE);
size_t msglen, i;
msglen = recv(fd, (void *)buffer, BUFSIZE, 0);
for(i=0; i<msglen; i++) {
printf("%02X", buffer[i]);
}
// --- cleanup ---
close(fd);
free(buffer);
return 0;
}
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