57 lines
1.4 KiB
C
57 lines
1.4 KiB
C
|
#include "net_tools.h"
|
||
|
|
|
||
|
|
int create_tcp_client(char* host, char* service) {
|
||
|
|
int err, sock;
|
||
|
|
struct addrinfo conf;
|
||
|
|
struct addrinfo *result, *cursor;
|
||
|
|
|
||
|
|
memset(&conf, 0, sizeof(struct addrinfo));
|
||
|
|
conf.ai_family = AF_UNSPEC;
|
||
|
|
conf.ai_socktype = SOCK_STREAM;
|
||
|
|
conf.ai_flags = 0;
|
||
|
|
conf.ai_protocol = 0;
|
||
|
|
|
||
|
|
err = getaddrinfo(host, service, &conf, &result);
|
||
|
|
if (err != 0) {
|
||
|
|
fprintf(stderr, "Error with getaddrinfo()\n");
|
||
|
|
exit(EXIT_FAILURE);
|
||
|
|
}
|
||
|
|
|
||
|
|
for (cursor = result; cursor != NULL; cursor = cursor->ai_next) {
|
||
|
|
sock = socket(cursor->ai_family, cursor->ai_socktype, cursor->ai_protocol);
|
||
|
|
if (sock == -1) continue;
|
||
|
|
if (connect(sock, cursor->ai_addr, cursor->ai_addrlen) != -1) break;
|
||
|
|
close(sock);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (cursor == NULL) {
|
||
|
|
fprintf(stderr, "No connect worked\n");
|
||
|
|
exit(EXIT_FAILURE);
|
||
|
|
}
|
||
|
|
|
||
|
|
freeaddrinfo(result);
|
||
|
|
|
||
|
|
return sock;
|
||
|
|
}
|
||
|
|
|
||
|
|
int read_entity(int fd, void* entity, int size) {
|
||
|
|
int remaining = size;
|
||
|
|
int total_read = 0;
|
||
|
|
|
||
|
|
while (remaining > 0) {
|
||
|
|
int nread = read(fd, ((char*)entity)+total_read, remaining);
|
||
|
|
if (nread == -1) {
|
||
|
|
return nread;
|
||
|
|
}
|
||
|
|
remaining -= nread;
|
||
|
|
total_read += nread;
|
||
|
|
}
|
||
|
|
return total_read;
|
||
|
|
}
|
||
|
|
|
||
|
|
void fill_buffer(size_t* written, char* dest, void *src, size_t n) {
|
||
|
|
memcpy(dest+*written, src, n);
|
||
|
|
*written += n;
|
||
|
|
}
|
||
|
|
|