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/* $Id: bot.c 15 2024-09-13 16:13:27Z nishi $ */
#include "ok_bot.h"
#include "ok_util.h"
#include "ok_news.h"
#include "ircfw.h"
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <strings.h>
#include <unistd.h>
#include <signal.h>
#include <stdbool.h>
#include <dirent.h>
#include <poll.h>
#include <sys/wait.h>
#include <sys/socket.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#ifdef __FreeBSD__
#include <netinet/in.h>
#endif
#define OKUU_VERSION "1.00"
extern char* nntppath;
extern char* nntpcount;
extern char* nntpfrom;
extern char* ircserver;
extern char* ircchan;
extern char* ircpass;
extern char* ircuser;
extern char* ircnick;
extern char* ircreal;
extern int ircport;
int ok_sock;
struct sockaddr_in ok_addr;
void ok_close(int sock) {
char c;
while(close(sock) == 0);
while(recv(sock, &c, 1, 0) > 0);
}
void ok_bot_kill(int sig) {
fprintf(stderr, "Shutdown\n");
ircfw_socket_send_cmd(ok_sock, NULL, "QUIT :Shutdown (Signal)");
exit(1);
}
bool ok_is_number(const char* str) {
int i;
for(i = 0; str[i] != 0; i++) {
if(!('0' <= str[i] && str[i] <= '9')) return false;
}
return true;
}
char* ok_null(const char* str) { return str == NULL ? "(null)" : (char*)str; }
int namesort(const struct dirent** a_, const struct dirent** b_) {
const struct dirent* a = *a_;
const struct dirent* b = *b_;
return atoi(a->d_name) - atoi(b->d_name);
}
int nodots(const struct dirent* d) { return (strcmp(d->d_name, "..") == 0 || strcmp(d->d_name, ".") == 0) ? 0 : 1; }
void ok_bot(void) {
if((ok_sock = socket(PF_INET, SOCK_STREAM, 0)) < 0) {
fprintf(stderr, "Socket creation failure\n");
return;
}
bzero((char*)&ok_addr, sizeof(ok_addr));
ok_addr.sin_family = PF_INET;
ok_addr.sin_addr.s_addr = inet_addr(ircserver);
ok_addr.sin_port = htons(ircport);
int yes = 1;
if(setsockopt(ok_sock, IPPROTO_TCP, TCP_NODELAY, (char*)&yes, sizeof(yes)) < 0) {
fprintf(stderr, "setsockopt failure");
ok_close(ok_sock);
return;
}
if(connect(ok_sock, (struct sockaddr*)&ok_addr, sizeof(ok_addr)) < 0) {
fprintf(stderr, "Connection failure\n");
ok_close(ok_sock);
return;
}
signal(SIGINT, ok_bot_kill);
signal(SIGTERM, ok_bot_kill);
char* construct = malloc(4097);
if(ircpass != NULL && strlen(ircpass) > 0) {
sprintf(construct, "PASS :%s", ircpass);
ircfw_socket_send_cmd(ok_sock, NULL, construct);
}
sprintf(construct, "USER %s %s %s :%s", ircuser, ircuser, ircuser, ircreal);
ircfw_socket_send_cmd(ok_sock, NULL, construct);
sprintf(construct, "NICK :%s", ircnick);
ircfw_socket_send_cmd(ok_sock, NULL, construct);
bool is_in = false;
bool sendable = false;
struct pollfd pollfds[1];
pollfds[0].fd = ok_sock;
pollfds[0].events = POLLIN | POLLPRI;
while(1) {
int r = poll(pollfds, 1, 100);
if(!(r > 0 && pollfds[0].revents & POLLIN)) {
/* 100ms sleep, technically */
uint64_t count = 0;
FILE* f = fopen(nntpcount, "rb");
if(f != NULL) {
fread(&count, sizeof(count), 1, f);
fclose(f);
}
struct dirent** list;
int n = scandir(nntppath, &list, nodots, namesort);
if(n >= 0) {
int i;
uint64_t last = 0;
for(i = 0; i < n; i++) {
if(!sendable || strcmp(list[i]->d_name, ".") == 0 || strcmp(list[i]->d_name, "..") == 0) {
free(list[i]);
continue;
}
if(count <= atoi(list[i]->d_name)) {
sprintf(construct, "%s/%s", nntppath, list[i]->d_name);
if(ok_news_read(construct) == 0) {
if(strcmp(news_entry.from, nntpfrom) != 0) {
char* tmp = ok_strcat3("PRIVMSG ", ircchan,
" :\x03"
"07[USENET] ~ ");
char* temp = ok_strcat3(tmp, news_entry.from, "\x03 ");
free(tmp);
int j;
int incr = 0;
for(j = 0;; j++) {
if(news_entry.content[j] == 0 || news_entry.content[j] == '\n') {
char* line = malloc(j - incr + 1);
line[j - incr] = 0;
memcpy(line, news_entry.content + incr, j - incr);
if(strlen(line) > 0) {
char* msg = ok_strcat(temp, line);
ircfw_socket_send_cmd(ok_sock, NULL, msg);
free(msg);
usleep(1000 * 100); /* Sleep for 100ms */
}
free(line);
incr = j + 1;
if(news_entry.content[j] == 0) break;
}
}
free(temp);
}
} else {
fprintf(stderr, "Could not read %s\n", construct);
}
}
last = atoi(list[i]->d_name) + 1;
free(list[i]);
}
count = last;
free(list);
}
if(sendable) {
f = fopen(nntpcount, "wb");
if(f != NULL) {
fwrite(&count, sizeof(count), 1, f);
fclose(f);
}
}
continue;
}
int st = ircfw_socket_read_cmd(ok_sock);
if(st != 0) {
fprintf(stderr, "Bad response\n");
return;
}
if(strlen(ircfw_message.command) == 3 && ok_is_number(ircfw_message.command)) {
int res = atoi(ircfw_message.command);
if(!is_in && 400 <= res && res <= 599) {
fprintf(stderr, "Bad response\n");
return;
} else if(400 <= res && res <= 599) {
fprintf(stderr, "Ignored error: %d\n", res);
continue;
}
if(res == 376) {
is_in = true;
fprintf(stderr, "Login successful\n");
sprintf(construct, "JOIN :%s", ircchan);
ircfw_socket_send_cmd(ok_sock, NULL, construct);
} else if(res == 366) {
sendable = true;
}
} else {
if(strcasecmp(ircfw_message.command, "PING") == 0) {
fprintf(stderr, "Ping request\n");
sprintf(construct, "PONG :%s", ok_null(ircfw_message.prefix));
ircfw_socket_send_cmd(ok_sock, NULL, construct);
} else if(strcasecmp(ircfw_message.command, "PRIVMSG") == 0) {
char* prefix = ircfw_message.prefix;
char** params = ircfw_message.params;
int len = 0;
if(params != NULL) {
int i;
for(i = 0; params[i] != NULL; i++)
;
len = i;
}
if(prefix != NULL && len == 2) {
char* sentin = params[0];
char* msg = params[1];
char* nick = ok_strdup(prefix);
int i;
for(i = 0; nick[i] != 0; i++) {
if(nick[i] == '!') {
nick[i] = 0;
break;
}
}
if(msg[0] == 1 && msg[strlen(msg) - 1] == 1) {
/* CTCP */
if(strcasecmp(msg, "\x01VERSION\x01") == 0) {
sprintf(construct, "NOTICE %s :\x01VERSION Okuu %s / IRC Frameworks %s: http://nishi.boats/okuu\x01", nick, OKUU_VERSION, IRCFW_VERSION);
ircfw_socket_send_cmd(ok_sock, NULL, construct);
}
} else if(sentin[0] == '#') {
/* This was sent in channel */
pid_t pid = fork();
int code;
if(pid == 0){
close(ok_sock);
_exit(ok_news_write(nick, msg));
}else{
int status;
waitpid(pid, &status, 0);
code = WEXITSTATUS(status);
}
if(code != 0) {
sprintf(construct, "PRIVMSG %s :Could not send the message to the USENET", sentin);
ircfw_socket_send_cmd(ok_sock, NULL, construct);
}
}
free(nick);
}
} else if(strcasecmp(ircfw_message.command, "ERROR") == 0) {
if(ircfw_message.params != NULL) {
int i;
for(i = 0; ircfw_message.params[i] != NULL; i++) fprintf(stderr, "ERROR: %s\n", ircfw_message.params[i]);
}
}
}
}
ircfw_socket_send_cmd(ok_sock, NULL, "QUIT :Shutdown");
free(construct);
}