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irc.c
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161
irc.c
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#include "irc.h"
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unsigned int IRCC_connect(IRCC_client *irc, const char *ip, const unsigned int port){
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struct hostent *ghbn = gethostbyname(ip);
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if (!ghbn)
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return IRCC_ERROR;
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//Only ipv4
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struct sockaddr_in client_str;
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memset(&client_str, 0, sizeof(client_str));
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client_str.sin_family = AF_INET;
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client_str.sin_port = htons(port);
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client_str.sin_addr.s_addr = inet_addr(inet_ntoa(*(struct in_addr *)ghbn->h_addr));
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irc->socket = socket(AF_INET, SOCK_STREAM, 0);
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if (irc->socket < 0)
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return IRCC_ERROR;
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int status = connect(irc->socket, (struct sockaddr *)&client_str, sizeof(client_str));
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if (status == -1)
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return IRCC_ERROR;
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return IRCC_SUCCESS;
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}
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unsigned int IRCC_register(IRCC_client *irc, const char *nickname){
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size_t size = strlen("NICK %s\r\nUSER %s 0 localhost :%s \r\n") + (strlen(nickname) * 3);
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char *tmp = (char *)malloc(size);
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if (tmp == NULL){
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fprintf(stderr, "malloc returned NULL (IRCC_register)\n");
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exit(1);
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}
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sleep(2);
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snprintf(tmp, size, "NICK %s\r\nUSER %s 0 localhost :%s\r\n", nickname, nickname, nickname);
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send(irc->socket, tmp, strlen(tmp), 0);
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free(tmp);
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return IRCC_SUCCESS;
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}
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void IRCC_parse(char *tmp, IRCC_client *irc){
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irc->raw[strcspn(irc->raw, "\r\n")] = '\0';
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if (tmp != NULL){
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//Message
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if (strstr(tmp, ":") != NULL)
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irc->msg = strstr(tmp, ":");
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//Channel
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if (strstr(tmp, " ") != NULL){
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irc->channel = strstr(tmp, " ") + 1;
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irc->channel[strcspn(irc->channel, ":") - 1] = '\0';
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}
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//Nickname
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irc->raw[strcspn(irc->raw, "!")] = '\0';
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irc->nick = irc->raw + 1;
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}
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}
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unsigned int IRCC_recv(IRCC_client *irc){
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memset(irc->raw, '\0', irc->size);
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irc->channel = NULL;
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irc->msg = NULL;
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irc->nick = NULL;
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int msg_size = recv(irc->socket, irc->raw, irc->size, 0);
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if (msg_size == 0 || msg_size == -1)
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return IRCC_DISCONNECTED;
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else if (!strncmp(irc->raw, "PING", 4)){
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*(strchr(irc->raw, 'I')) = 'O';
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send(irc->socket, irc->raw, strlen(irc->raw), 0);
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return IRCC_PING;
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}
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else {
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//puts(irc->raw);
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//Check end of motd
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if (strstr(irc->raw, "PRIVMSG ") == NULL && strstr(irc->raw, "MOTD"))
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return IRCC_CONNECTED;
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//Other
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else if (strstr(irc->raw, "PRIVMSG ")){
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IRCC_parse(strstr(irc->raw, "PRIVMSG "), irc);
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return IRCC_PRIVMSG;
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}
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else if (strstr(irc->raw, "NICK ")){
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IRCC_parse(strstr(irc->raw, "NICK "), irc);
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return IRCC_NICK;
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}
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else if (strstr(irc->raw, "TOPIC ")){
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IRCC_parse(strstr(irc->raw, "TOPIC "), irc);
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return IRCC_TOPIC;
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}
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else if (strstr(irc->raw, "MODE ")){
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IRCC_parse(strstr(irc->raw, "MODE "), irc);
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return IRCC_MODE;
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}
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else if (strstr(irc->raw, "JOIN ")){
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IRCC_parse(strstr(irc->raw, "JOIN "), irc);
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return IRCC_JOIN;
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}
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else if (strstr(irc->raw, "PART ") || strstr(irc->raw, "QUIT ")){
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IRCC_parse(strstr(irc->raw, "PART "), irc);
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IRCC_parse(strstr(irc->raw, "QUIT "), irc);
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return IRCC_PART;
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}
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}
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return IRCC_SUCCESS;
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}
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void IRCC_send(IRCC_client *irc, char *msg, char *channel){
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size_t size = strlen("PRIVMSG :\r\n") + strlen(channel) + strlen(msg);
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char *tmp = (char *)malloc(size + 1);
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if (tmp == NULL){
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fprintf(stderr, "malloc returned NULL (IRCC_send)\n");
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exit(1);
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}
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snprintf(tmp, size, "PRIVMSG %s :%s\r\n", channel, msg);
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send(irc->socket, tmp, strlen(tmp), 0);
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memset(tmp, 0, size);
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free(tmp);
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}
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unsigned int IRCC_init(IRCC_client *irc, size_t size){
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if (size <= 250){
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fprintf(stderr, "Low buffer size (IRCC_init) (Min 250/512)\n");
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return IRCC_ERROR;
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}
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irc->raw = (char *)malloc(size + 1);
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if (irc->raw == NULL){
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fprintf(stderr, "malloc returned NULL (IRCC_init)\n");
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exit(1);
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}
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irc->msg = irc->nick = irc->channel = NULL;
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irc->size = size;
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return IRCC_SUCCESS;
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}
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void IRCC_close(IRCC_client *irc){
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close(irc->socket);
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free(irc->raw);
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irc->raw = irc->msg = irc->nick = irc->channel = NULL;
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irc->size = 0;
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}
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51
irc.h
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51
irc.h
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/*
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LICENSE: MIT
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Simple libary for working with ipv4 irc servers
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Dont support:
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ssl
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ddc
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ipv6
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motd parsing
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <netdb.h>
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#include <netinet/in.h>
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#include <sys/socket.h>
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#include <arpa/inet.h>
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#define IRCC_MSG_MAX 512
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#define IRCC_PING_TIMEOUT 600
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enum {
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IRCC_NICK = 1,
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IRCC_PRIVMSG,
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IRCC_JOIN,
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IRCC_PART,
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IRCC_PING,
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IRCC_TOPIC,
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IRCC_MODE,
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IRCC_CONNECTED,
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IRCC_DISCONNECTED,
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IRCC_ERROR,
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IRCC_SUCCESS
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};
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typedef struct {
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int socket;
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size_t size;
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char *raw;
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char *msg;
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char *channel;
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char *nick;
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} IRCC_client;
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unsigned int IRCC_connect(IRCC_client *irc, const char *ip, const unsigned int port);
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unsigned int IRCC_register(IRCC_client *irc, const char *nickname);
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unsigned int IRCC_recv(IRCC_client *irc);
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void IRCC_send(IRCC_client *irc, char *msg, char *channel);
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unsigned int IRCC_init(IRCC_client *irc, size_t size);
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void IRCC_close(IRCC_client *irc);
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81
main.c
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81
main.c
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#include "irc.h"
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//Config
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#define HOST "localhost"
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#define PORT 6667
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#define NICK "tester134"
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char *channels[] = {"#channel"};
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#define CHECK_NULL() (client.nick != NULL && client.channel != NULL && client.msg != NULL)
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IRCC_client client;
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void die(char *msg) {
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puts(msg);
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IRCC_close(&client);
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exit(1);
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}
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void recvinfo(void) {
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while (1) {
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unsigned int irc_status = IRCC_recv(&client);
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if (irc_status == IRCC_DISCONNECTED)
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die("Disconnected");
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else if (irc_status == IRCC_CONNECTED)
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return;
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//Print
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if (CHECK_NULL() && irc_status == IRCC_PRIVMSG)
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printf("[%s %s] %s\n", client.channel, client.nick, client.msg);
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else if (CHECK_NULL() && irc_status == IRCC_NICK)
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printf("[N] %s is know as %s\n", client.nick, client.msg);
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else if (CHECK_NULL() && irc_status == IRCC_TOPIC)
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printf("[T] %s\n", client.msg);
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else if (client.nick != NULL && irc_status == IRCC_JOIN)
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printf("[>] %s\n", client.nick);
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else if (client.nick != NULL && irc_status == IRCC_PART)
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printf("[<] %s\n", client.nick);
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}
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}
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int main(void) {
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//512 - size of raw buffer (max irc)
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IRCC_init(&client, IRCC_MSG_MAX);
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int status = IRCC_connect(&client, HOST, PORT);
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if (status == IRCC_ERROR)
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die("Conn refused");
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//Socket timeout
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struct timeval tv = {IRCC_PING_TIMEOUT, IRCC_PING_TIMEOUT};
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if (setsockopt(client.socket, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)) < 0)
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die("setsockopt");
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//Register
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IRCC_register(&client, NICK);
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//Recv motd and join in channel
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recvinfo();
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sleep(5);
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for (size_t i = 0; i < sizeof(channels) / sizeof(char *); i++) {
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if (channels[i] == NULL)
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break;
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size_t join_size = strlen("JOIN \r\n") + strlen(channels[i]) + 1;
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char *tmp = malloc(join_size);
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if (tmp == NULL)
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die("malloc retured NULL");
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snprintf(tmp, join_size, "JOIN %s\r\n", channels[i]);
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send(client.socket, tmp, join_size, 0);
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free(tmp);
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}
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recvinfo();
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}
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