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3 nishi 1 
/* $Id: bot.c 14 2024-09-12 22:19:34Z nishi $ */
2 
 
3 
#include "ok_bot.h"
4 
 
5 
#include "ok_util.h"
6 
#include "ok_news.h"
7 
 
8 
#include "ircfw.h"
9 
 
10 
#include <stdint.h>
11 
#include <stdlib.h>
12 
#include <stdio.h>
13 
#include <strings.h>
14 
#include <unistd.h>
15 
#include <signal.h>
16 
#include <stdbool.h>
17 
#include <dirent.h>
18 
#include <poll.h>
13 nishi 19 
#include <sys/wait.h>
3 nishi 20 
 
21 
#include <sys/socket.h>
22 
#include <netinet/tcp.h>
23 
#include <arpa/inet.h>
24 
 
25 
#ifdef __FreeBSD__
26 
#include <netinet/in.h>
27 
#endif
28 
 
29 
#define OKUU_VERSION "1.00"
30 
 
31 
extern char* nntppath;
32 
extern char* nntpcount;
6 nishi 33 
extern char* nntpfrom;
3 nishi 34 
 
35 
extern char* ircserver;
36 
extern char* ircchan;
37 
extern char* ircpass;
38 
extern char* ircuser;
39 
extern char* ircnick;
40 
extern char* ircreal;
41 
extern int ircport;
42 
 
43 
int ok_sock;
44 
struct sockaddr_in ok_addr;
45 
 
13 nishi 46 
void ok_close(int sock) {
14 nishi 47 
	char c;
13 nishi 48 
	while(close(sock) == 0);
14 nishi 49 
	while(recv(sock, &c, 1, 0) > 0);
13 nishi 50 
}
3 nishi 51 
 
11 nishi 52 
void ok_bot_kill(int sig) {
3 nishi 53 
	fprintf(stderr, "Shutdown\n");
54 
	ircfw_socket_send_cmd(ok_sock, NULL, "QUIT :Shutdown (Signal)");
55 
	exit(1);
56 
}
57 
 
58 
bool ok_is_number(const char* str) {
59 
	int i;
60 
	for(i = 0; str[i] != 0; i++) {
61 
		if(!('0' <= str[i] && str[i] <= '9')) return false;
62 
	}
63 
	return true;
64 
}
65 
 
11 nishi 66 
char* ok_null(const char* str) { return str == NULL ? "(null)" : (char*)str; }
3 nishi 67 
 
11 nishi 68 
int namesort(const struct dirent** a_, const struct dirent** b_) {
3 nishi 69 
	const struct dirent* a = *a_;
70 
	const struct dirent* b = *b_;
71 
	return atoi(a->d_name) - atoi(b->d_name);
72 
}
73 
 
11 nishi 74 
int nodots(const struct dirent* d) { return (strcmp(d->d_name, "..") == 0 || strcmp(d->d_name, ".") == 0) ? 0 : 1; }
3 nishi 75 
 
11 nishi 76 
void ok_bot(void) {
77 
	if((ok_sock = socket(PF_INET, SOCK_STREAM, 0)) < 0) {
3 nishi 78 
		fprintf(stderr, "Socket creation failure\n");
79 
		return;
80 
	}
81 
 
82 
	bzero((char*)&ok_addr, sizeof(ok_addr));
83 
	ok_addr.sin_family = PF_INET;
84 
	ok_addr.sin_addr.s_addr = inet_addr(ircserver);
85 
	ok_addr.sin_port = htons(ircport);
5 nishi 86 
 
87 
	int yes = 1;
88 
 
89 
	if(setsockopt(ok_sock, IPPROTO_TCP, TCP_NODELAY, (char*)&yes, sizeof(yes)) < 0) {
90 
		fprintf(stderr, "setsockopt failure");
91 
		ok_close(ok_sock);
92 
		return;
93 
	}
11 nishi 94 
 
95 
	if(connect(ok_sock, (struct sockaddr*)&ok_addr, sizeof(ok_addr)) < 0) {
3 nishi 96 
		fprintf(stderr, "Connection failure\n");
97 
		ok_close(ok_sock);
98 
		return;
99 
	}
100 
 
101 
	signal(SIGINT, ok_bot_kill);
102 
	signal(SIGTERM, ok_bot_kill);
103 
 
104 
	char* construct = malloc(1025);
105 
 
11 nishi 106 
	if(ircpass != NULL && strlen(ircpass) > 0) {
3 nishi 107 
		sprintf(construct, "PASS :%s", ircpass);
108 
		ircfw_socket_send_cmd(ok_sock, NULL, construct);
109 
	}
110 
 
111 
	sprintf(construct, "USER %s %s %s :%s", ircuser, ircuser, ircuser, ircreal);
112 
	ircfw_socket_send_cmd(ok_sock, NULL, construct);
113 
 
114 
	sprintf(construct, "NICK :%s", ircnick);
115 
	ircfw_socket_send_cmd(ok_sock, NULL, construct);
116 
 
117 
	bool is_in = false;
4 nishi 118 
	bool sendable = false;
3 nishi 119 
 
120 
	struct pollfd pollfds[1];
121 
	pollfds[0].fd = ok_sock;
122 
	pollfds[0].events = POLLIN | POLLPRI;
123 
 
11 nishi 124 
	while(1) {
3 nishi 125 
		int r = poll(pollfds, 1, 100);
11 nishi 126 
		if(!(r > 0 && pollfds[0].revents & POLLIN)) {
3 nishi 127 
			/* 100ms sleep, technically */
128 
			uint64_t count = 0;
129 
			FILE* f = fopen(nntpcount, "rb");
11 nishi 130 
			if(f != NULL) {
3 nishi 131 
				fread(&count, sizeof(count), 1, f);
132 
				fclose(f);
133 
			}
134 
			struct dirent** list;
135 
			int n = scandir(nntppath, &list, nodots, namesort);
11 nishi 136 
			if(n >= 0) {
3 nishi 137 
				int i;
11 nishi 138 
				for(i = 0; i < n; i++) {
139 
					if(!sendable) {
4 nishi 140 
						free(list[i]);
141 
						continue;
142 
					}
11 nishi 143 
					if(count <= atoi(list[i]->d_name)) {
3 nishi 144 
						sprintf(construct, "%s/%s", nntppath, list[i]->d_name);
11 nishi 145 
						if(ok_news_read(construct) == 0) {
146 
							if(strcmp(news_entry.from, nntpfrom) != 0) {
147 
								char* tmp = ok_strcat3("PRIVMSG ", ircchan,
148 
										       " :\x03"
149 
										       "07[USENET] ~ ");
8 nishi 150 
								char* temp = ok_strcat3(tmp, news_entry.from, "\x03 ");
151 
								free(tmp);
152 
								int j;
153 
								int incr = 0;
11 nishi 154 
								for(j = 0;; j++) {
155 
									if(news_entry.content[j] == 0 || news_entry.content[j] == '\n') {
8 nishi 156 
										char* line = malloc(j - incr + 1);
157 
										line[j - incr] = 0;
158 
										memcpy(line, news_entry.content + incr, j - incr);
11 nishi 159 
 
160 
										if(strlen(line) > 0) {
8 nishi 161 
											char* msg = ok_strcat(temp, line);
162 
											ircfw_socket_send_cmd(ok_sock, NULL, msg);
163 
											free(msg);
164 
											usleep(1000 * 100); /* Sleep for 100ms */
165 
										}
11 nishi 166 
 
8 nishi 167 
										free(line);
168 
										incr = j + 1;
169 
										if(news_entry.content[j] == 0) break;
3 nishi 170 
									}
171 
								}
8 nishi 172 
								free(temp);
3 nishi 173 
							}
11 nishi 174 
						} else {
3 nishi 175 
							fprintf(stderr, "Could not read %s\n", construct);
176 
						}
177 
					}
178 
					free(list[i]);
179 
				}
180 
				count = atoi(list[i - 1]->d_name) + 1;
181 
				free(list);
182 
			}
11 nishi 183 
			if(sendable) {
7 nishi 184 
				f = fopen(nntpcount, "wb");
11 nishi 185 
				if(f != NULL) {
7 nishi 186 
					fwrite(&count, sizeof(count), 1, f);
187 
					fclose(f);
188 
				}
3 nishi 189 
			}
190 
			continue;
191 
		}
192 
		int st = ircfw_socket_read_cmd(ok_sock);
11 nishi 193 
		if(st != 0) {
3 nishi 194 
			fprintf(stderr, "Bad response\n");
195 
			return;
196 
		}
11 nishi 197 
		if(strlen(ircfw_message.command) == 3 && ok_is_number(ircfw_message.command)) {
3 nishi 198 
			int res = atoi(ircfw_message.command);
11 nishi 199 
			if(!is_in && 400 <= res && res <= 599) {
3 nishi 200 
				fprintf(stderr, "Bad response\n");
201 
				return;
11 nishi 202 
			} else if(400 <= res && res <= 599) {
3 nishi 203 
				fprintf(stderr, "Ignored error: %d\n", res);
204 
				continue;
205 
			}
11 nishi 206 
			if(res == 376) {
3 nishi 207 
				is_in = true;
208 
				fprintf(stderr, "Login successful\n");
209 
				sprintf(construct, "JOIN :%s", ircchan);
210 
				ircfw_socket_send_cmd(ok_sock, NULL, construct);
11 nishi 211 
			} else if(res == 331 || res == 332) {
4 nishi 212 
				sendable = true;
3 nishi 213 
			}
11 nishi 214 
		} else {
215 
			if(strcasecmp(ircfw_message.command, "PING") == 0) {
3 nishi 216 
				fprintf(stderr, "Ping request\n");
217 
				sprintf(construct, "PONG :%s", ok_null(ircfw_message.prefix));
218 
				ircfw_socket_send_cmd(ok_sock, NULL, construct);
11 nishi 219 
			} else if(strcasecmp(ircfw_message.command, "PRIVMSG") == 0) {
3 nishi 220 
				char* prefix = ircfw_message.prefix;
221 
				char** params = ircfw_message.params;
222 
 
223 
				int len = 0;
224 
				if(params != NULL) {
225 
					int i;
11 nishi 226 
					for(i = 0; params[i] != NULL; i++)
227 
						;
3 nishi 228 
					len = i;
229 
				}
230 
				if(prefix != NULL && len == 2) {
231 
					char* sentin = params[0];
232 
					char* msg = params[1];
233 
					char* nick = ok_strdup(prefix);
234 
					int i;
235 
					for(i = 0; nick[i] != 0; i++) {
236 
						if(nick[i] == '!') {
237 
							nick[i] = 0;
238 
							break;
239 
						}
240 
					}
11 nishi 241 
					if(msg[0] == 1 && msg[strlen(msg) - 1] == 1) {
3 nishi 242 
						/* CTCP */
11 nishi 243 
						if(strcasecmp(msg, "\x01VERSION\x01") == 0) {
3 nishi 244 
							sprintf(construct, "NOTICE %s :\x01VERSION Okuu %s / IRC Frameworks %s: http://nishi.boats/okuu\x01", nick, OKUU_VERSION, IRCFW_VERSION);
245 
							ircfw_socket_send_cmd(ok_sock, NULL, construct);
246 
						}
11 nishi 247 
					} else if(sentin[0] == '#') {
3 nishi 248 
						/* This was sent in channel */
13 nishi 249 
						pid_t pid = fork();
250 
						int code;
251 
						if(pid == 0){
14 nishi 252 
							close(ok_sock);
13 nishi 253 
							_exit(ok_news_write(nick, msg));
254 
						}else{
255 
							int status;
256 
							waitpid(pid, &status, 0);
257 
							code = WEXITSTATUS(status);
258 
						}
259 
						if(code != 0) {
5 nishi 260 
							sprintf(construct, "PRIVMSG %s :Could not send the message to the USENET", sentin);
261 
							ircfw_socket_send_cmd(ok_sock, NULL, construct);
262 
						}
3 nishi 263 
					}
264 
 
265 
					free(nick);
266 
				}
11 nishi 267 
			} else if(strcasecmp(ircfw_message.command, "ERROR") == 0) {
268 
				if(ircfw_message.params != NULL) {
3 nishi 269 
					int i;
270 
					for(i = 0; ircfw_message.params[i] != NULL; i++) fprintf(stderr, "ERROR: %s\n", ircfw_message.params[i]);
271 
				}
272 
			}
273 
		}
274 
	}
275 
 
276 
	ircfw_socket_send_cmd(ok_sock, NULL, "QUIT :Shutdown");
277 
 
278 
	free(construct);
279 
}