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1 #include <stdio.h>
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2 #include <stdlib.h>
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3 #include <string.h>
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4 #include <uv.h>
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5
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6 uv_loop_t *loop;
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7
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8 void alloc_buffer(uv_handle_t *handle, size_t suggested_size, uv_buf_t *buf) {
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9 buf->base = malloc(suggested_size);
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10 buf->len = suggested_size;
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11 }
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12
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13 void on_read(uv_stream_t *client, ssize_t nread, const uv_buf_t *buf) {
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14 if (nread < 0) {
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15 if (nread != UV_EOF)
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16 fprintf(stderr, "Read error %s\n", uv_err_name(nread));
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17 uv_close((uv_handle_t*) client, NULL);
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18 free(buf->base);
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19 free(client);
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20 return;
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21 }
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22
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23 char *data = (char*) malloc(sizeof(char) * (nread+1));
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24 data[nread] = '\0';
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25 strncpy(data, buf->base, nread);
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26
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27 fprintf(stderr, "%s", data);
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28 free(data);
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29 free(buf->base);
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30 }
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31
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32 void on_connect(uv_connect_t *req, int status) {
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33 if (status < 0) {
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34 fprintf(stderr, "connect failed error %s\n", uv_err_name(status));
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35 free(req);
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36 return;
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37 }
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38
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39 uv_read_start((uv_stream_t*) req->handle, alloc_buffer, on_read);
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40 free(req);
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41 }
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42
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43 void on_resolved(uv_getaddrinfo_t *resolver, int status, struct addrinfo *res) {
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44 if (status < 0) {
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45 fprintf(stderr, "getaddrinfo callback error %s\n", uv_err_name(status));
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46 return;
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47 }
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48
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49 char addr[17] = {'\0'};
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50 uv_ip4_name((struct sockaddr_in*) res->ai_addr, addr, 16);
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51 fprintf(stderr, "%s\n", addr);
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52
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53 uv_connect_t *connect_req = (uv_connect_t*) malloc(sizeof(uv_connect_t));
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54 uv_tcp_t *socket = (uv_tcp_t*) malloc(sizeof(uv_tcp_t));
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55 uv_tcp_init(loop, socket);
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56
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57 uv_tcp_connect(connect_req, socket, (const struct sockaddr*) res->ai_addr, on_connect);
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58
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59 uv_freeaddrinfo(res);
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60 }
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61
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62 int main() {
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63 loop = uv_default_loop();
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64
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65 struct addrinfo hints;
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66 hints.ai_family = PF_INET;
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67 hints.ai_socktype = SOCK_STREAM;
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68 hints.ai_protocol = IPPROTO_TCP;
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69 hints.ai_flags = 0;
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70
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71 uv_getaddrinfo_t resolver;
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72 fprintf(stderr, "irc.libera.chat is... ");
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73 int r = uv_getaddrinfo(loop, &resolver, on_resolved, "irc.libera.chat", "6667", &hints);
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74
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75 if (r) {
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76 fprintf(stderr, "getaddrinfo call error %s\n", uv_err_name(r));
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77 return 1;
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78 }
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79 return uv_run(loop, UV_RUN_DEFAULT);
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80 }
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