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8nlight 2023-08-23 19:22:57 +03:00
parent a2f5afe994
commit 278bf09a8a
3 changed files with 293 additions and 0 deletions

161
irc.c Normal file
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#include "irc.h"
unsigned int IRCC_connect(IRCC_client *irc, const char *ip, const unsigned int port){
struct hostent *ghbn = gethostbyname(ip);
if (!ghbn)
return IRCC_ERROR;
//Only ipv4
struct sockaddr_in client_str;
memset(&client_str, 0, sizeof(client_str));
client_str.sin_family = AF_INET;
client_str.sin_port = htons(port);
client_str.sin_addr.s_addr = inet_addr(inet_ntoa(*(struct in_addr *)ghbn->h_addr));
irc->socket = socket(AF_INET, SOCK_STREAM, 0);
if (irc->socket < 0)
return IRCC_ERROR;
int status = connect(irc->socket, (struct sockaddr *)&client_str, sizeof(client_str));
if (status == -1)
return IRCC_ERROR;
return IRCC_SUCCESS;
}
unsigned int IRCC_register(IRCC_client *irc, const char *nickname){
size_t size = strlen("NICK %s\r\nUSER %s 0 localhost :%s \r\n") + (strlen(nickname) * 3);
char *tmp = (char *)malloc(size);
if (tmp == NULL){
fprintf(stderr, "malloc returned NULL (IRCC_register)\n");
exit(1);
}
sleep(2);
snprintf(tmp, size, "NICK %s\r\nUSER %s 0 localhost :%s\r\n", nickname, nickname, nickname);
send(irc->socket, tmp, strlen(tmp), 0);
free(tmp);
return IRCC_SUCCESS;
}
void IRCC_parse(char *tmp, IRCC_client *irc){
irc->raw[strcspn(irc->raw, "\r\n")] = '\0';
if (tmp != NULL){
//Message
if (strstr(tmp, ":") != NULL)
irc->msg = strstr(tmp, ":");
//Channel
if (strstr(tmp, " ") != NULL){
irc->channel = strstr(tmp, " ") + 1;
irc->channel[strcspn(irc->channel, ":") - 1] = '\0';
}
//Nickname
irc->raw[strcspn(irc->raw, "!")] = '\0';
irc->nick = irc->raw + 1;
}
}
unsigned int IRCC_recv(IRCC_client *irc){
memset(irc->raw, '\0', irc->size);
irc->channel = NULL;
irc->msg = NULL;
irc->nick = NULL;
int msg_size = recv(irc->socket, irc->raw, irc->size, 0);
if (msg_size == 0 || msg_size == -1)
return IRCC_DISCONNECTED;
else if (!strncmp(irc->raw, "PING", 4)){
*(strchr(irc->raw, 'I')) = 'O';
send(irc->socket, irc->raw, strlen(irc->raw), 0);
return IRCC_PING;
}
else {
//puts(irc->raw);
//Check end of motd
if (strstr(irc->raw, "PRIVMSG ") == NULL && strstr(irc->raw, "MOTD"))
return IRCC_CONNECTED;
//Other
else if (strstr(irc->raw, "PRIVMSG ")){
IRCC_parse(strstr(irc->raw, "PRIVMSG "), irc);
return IRCC_PRIVMSG;
}
else if (strstr(irc->raw, "NICK ")){
IRCC_parse(strstr(irc->raw, "NICK "), irc);
return IRCC_NICK;
}
else if (strstr(irc->raw, "TOPIC ")){
IRCC_parse(strstr(irc->raw, "TOPIC "), irc);
return IRCC_TOPIC;
}
else if (strstr(irc->raw, "MODE ")){
IRCC_parse(strstr(irc->raw, "MODE "), irc);
return IRCC_MODE;
}
else if (strstr(irc->raw, "JOIN ")){
IRCC_parse(strstr(irc->raw, "JOIN "), irc);
return IRCC_JOIN;
}
else if (strstr(irc->raw, "PART ") || strstr(irc->raw, "QUIT ")){
IRCC_parse(strstr(irc->raw, "PART "), irc);
IRCC_parse(strstr(irc->raw, "QUIT "), irc);
return IRCC_PART;
}
}
return IRCC_SUCCESS;
}
void IRCC_send(IRCC_client *irc, char *msg, char *channel){
size_t size = strlen("PRIVMSG :\r\n") + strlen(channel) + strlen(msg);
char *tmp = (char *)malloc(size + 1);
if (tmp == NULL){
fprintf(stderr, "malloc returned NULL (IRCC_send)\n");
exit(1);
}
snprintf(tmp, size, "PRIVMSG %s :%s\r\n", channel, msg);
send(irc->socket, tmp, strlen(tmp), 0);
memset(tmp, 0, size);
free(tmp);
}
unsigned int IRCC_init(IRCC_client *irc, size_t size){
if (size <= 250){
fprintf(stderr, "Low buffer size (IRCC_init) (Min 250/512)\n");
return IRCC_ERROR;
}
irc->raw = (char *)malloc(size + 1);
if (irc->raw == NULL){
fprintf(stderr, "malloc returned NULL (IRCC_init)\n");
exit(1);
}
irc->msg = irc->nick = irc->channel = NULL;
irc->size = size;
return IRCC_SUCCESS;
}
void IRCC_close(IRCC_client *irc){
close(irc->socket);
free(irc->raw);
irc->raw = irc->msg = irc->nick = irc->channel = NULL;
irc->size = 0;
}

51
irc.h Normal file
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/*
LICENSE: MIT
Simple libary for working with ipv4 irc servers
Dont support:
ssl
ddc
ipv6
motd parsing
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <netdb.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#define IRCC_MSG_MAX 512
#define IRCC_PING_TIMEOUT 600
enum {
IRCC_NICK = 1,
IRCC_PRIVMSG,
IRCC_JOIN,
IRCC_PART,
IRCC_PING,
IRCC_TOPIC,
IRCC_MODE,
IRCC_CONNECTED,
IRCC_DISCONNECTED,
IRCC_ERROR,
IRCC_SUCCESS
};
typedef struct {
int socket;
size_t size;
char *raw;
char *msg;
char *channel;
char *nick;
} IRCC_client;
unsigned int IRCC_connect(IRCC_client *irc, const char *ip, const unsigned int port);
unsigned int IRCC_register(IRCC_client *irc, const char *nickname);
unsigned int IRCC_recv(IRCC_client *irc);
void IRCC_send(IRCC_client *irc, char *msg, char *channel);
unsigned int IRCC_init(IRCC_client *irc, size_t size);
void IRCC_close(IRCC_client *irc);

81
main.c Normal file
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#include "irc.h"
//Config
#define HOST "localhost"
#define PORT 6667
#define NICK "tester134"
char *channels[] = {"#channel"};
#define CHECK_NULL() (client.nick != NULL && client.channel != NULL && client.msg != NULL)
IRCC_client client;
void die(char *msg) {
puts(msg);
IRCC_close(&client);
exit(1);
}
void recvinfo(void) {
while (1) {
unsigned int irc_status = IRCC_recv(&client);
if (irc_status == IRCC_DISCONNECTED)
die("Disconnected");
else if (irc_status == IRCC_CONNECTED)
return;
//Print
if (CHECK_NULL() && irc_status == IRCC_PRIVMSG)
printf("[%s %s] %s\n", client.channel, client.nick, client.msg);
else if (CHECK_NULL() && irc_status == IRCC_NICK)
printf("[N] %s is know as %s\n", client.nick, client.msg);
else if (CHECK_NULL() && irc_status == IRCC_TOPIC)
printf("[T] %s\n", client.msg);
else if (client.nick != NULL && irc_status == IRCC_JOIN)
printf("[>] %s\n", client.nick);
else if (client.nick != NULL && irc_status == IRCC_PART)
printf("[<] %s\n", client.nick);
}
}
int main(void) {
//512 - size of raw buffer (max irc)
IRCC_init(&client, IRCC_MSG_MAX);
int status = IRCC_connect(&client, HOST, PORT);
if (status == IRCC_ERROR)
die("Conn refused");
//Socket timeout
struct timeval tv = {IRCC_PING_TIMEOUT, IRCC_PING_TIMEOUT};
if (setsockopt(client.socket, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)) < 0)
die("setsockopt");
//Register
IRCC_register(&client, NICK);
//Recv motd and join in channel
recvinfo();
sleep(5);
for (size_t i = 0; i < sizeof(channels) / sizeof(char *); i++) {
if (channels[i] == NULL)
break;
size_t join_size = strlen("JOIN \r\n") + strlen(channels[i]) + 1;
char *tmp = malloc(join_size);
if (tmp == NULL)
die("malloc retured NULL");
snprintf(tmp, join_size, "JOIN %s\r\n", channels[i]);
send(client.socket, tmp, join_size, 0);
free(tmp);
}
recvinfo();
}