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3 nishi 1 
/* $Id: news.c 11 2024-09-11 10:24:20Z nishi $ */
2 
 
3 
#define OK_NEWS_SRC
4 
#include "ok_news.h"
5 
 
6 
#include "ok_util.h"
7 
 
8 
#include <stdio.h>
9 
#include <stdbool.h>
10 
#include <string.h>
11 
#include <stdlib.h>
12 
#include <stdint.h>
13 
#include <sys/stat.h>
14 
 
5 nishi 15 
#include <sys/socket.h>
16 
#include <netinet/tcp.h>
17 
#include <arpa/inet.h>
18 
 
19 
#ifdef __FreeBSD__
20 
#include <netinet/in.h>
21 
#endif
22 
 
23 
extern char* nntpserver;
24 
extern char* nntpuser;
25 
extern char* nntppass;
26 
extern char* nntppath;
27 
extern char* nntpfrom;
28 
extern char* nntpgroup;
29 
extern char* nntpcount;
30 
extern int nntpport;
31 
 
3 nishi 32 
struct news_entry news_entry;
33 
 
5 nishi 34 
void ok_close(int sock);
35 
 
11 nishi 36 
void ok_news_init(void) {
3 nishi 37 
	news_entry.from = NULL;
38 
	news_entry.content = NULL;
39 
}
40 
 
11 nishi 41 
int ok_news_read(const char* path) {
42 
	if(news_entry.from != NULL) {
3 nishi 43 
		free(news_entry.from);
44 
		news_entry.from = NULL;
45 
	}
11 nishi 46 
	if(news_entry.content != NULL) {
3 nishi 47 
		free(news_entry.content);
48 
		news_entry.content = NULL;
49 
	}
50 
 
51 
	struct stat s;
11 nishi 52 
	if(stat(path, &s) == 0) {
3 nishi 53 
		char* boundary = NULL;
54 
		char* buffer = malloc(s.st_size + 1);
55 
		buffer[s.st_size] = 0;
56 
		FILE* f = fopen(path, "r");
57 
		fread(buffer, s.st_size, 1, f);
58 
 
59 
		uint64_t i;
60 
		bool newline = false;
61 
		int incr = 0;
62 
		char* l = malloc(1);
63 
		l[0] = 0;
64 
		bool header = true;
65 
		bool ignore = false;
66 
		bool bheader = false;
11 nishi 67 
		for(i = 0; i < s.st_size; i++) {
68 
			if(buffer[i] == '\r') {
69 
				if(buffer[i + 1] == '\n') {
3 nishi 70 
					/* newline */
71 
					i++;
11 nishi 72 
					if(!header) {
3 nishi 73 
						char* line = malloc(i - 1 - incr + 1);
74 
						line[i - 1 - incr] = 0;
75 
						memcpy(line, buffer + incr, i - 1 - incr);
76 
 
11 nishi 77 
						if(strcmp(line, ".") == 0) {
3 nishi 78 
							free(line);
79 
							break;
11 nishi 80 
						} else {
3 nishi 81 
							char* ln = line;
11 nishi 82 
							if(line[0] == '.') {
3 nishi 83 
								ln++;
84 
							}
85 
 
11 nishi 86 
							if(news_entry.content == NULL) {
3 nishi 87 
								news_entry.content = malloc(1);
88 
								news_entry.content[0] = 0;
89 
							}
90 
 
11 nishi 91 
							if(boundary != NULL && strcmp(ln, boundary) == 0) {
3 nishi 92 
								bheader = true;
93 
								ignore = true;
11 nishi 94 
							} else if(boundary != NULL && bheader && strlen(ln) == 0) {
3 nishi 95 
								bheader = false;
96 
								free(line);
97 
								incr = i + 1;
98 
								newline = true;
99 
								continue;
11 nishi 100 
							} else if(boundary != NULL && bheader) {
3 nishi 101 
								int j;
11 nishi 102 
								for(j = 0; j < strlen(ln); j++) {
103 
									if(ln[j] == ':') {
3 nishi 104 
										ln[j] = 0;
11 nishi 105 
										if(strcasecmp(ln, "Content-Type") == 0) {
3 nishi 106 
											ignore = false;
107 
											j++;
11 nishi 108 
											for(; ln[j] != 0 && (ln[j] == ' ' || ln[j] == '\t'); j++)
109 
												;
110 
											if(ln[j] != 0) {
3 nishi 111 
												char* v = ln + j;
112 
												int k;
11 nishi 113 
												for(k = 0; v[k] != 0; k++) {
114 
													if(v[k] == ';') {
3 nishi 115 
														v[k] = 0;
116 
														break;
117 
													}
118 
												}
11 nishi 119 
												if(strcasecmp(v, "text/plain") == 0) {
120 
												} else {
3 nishi 121 
													ignore = true;
122 
												}
123 
											}
124 
										}
125 
										break;
126 
									}
127 
								}
128 
							}
129 
 
11 nishi 130 
							if(!ignore && !bheader) {
3 nishi 131 
								char* tmp = news_entry.content;
132 
								news_entry.content = ok_strcat3(tmp, ln, "\n");
133 
								free(tmp);
134 
							}
135 
						}
136 
 
137 
						free(line);
11 nishi 138 
					} else if(newline) {
3 nishi 139 
						header = false;
11 nishi 140 
					} else {
3 nishi 141 
						char* line = malloc(i - 1 - incr + 1);
142 
						line[i - 1 - incr] = 0;
143 
						memcpy(line, buffer + incr, i - 1 - incr);
144 
 
145 
						char* last = ok_strdup(l);
146 
						char* tmp = l;
147 
						l = ok_strcat(tmp, line);
148 
						free(tmp);
149 
						bool al = false;
11 nishi 150 
						if(('a' <= line[0] && line[0] <= 'z') || ('A' <= line[0] && line[0] <= 'Z')) {
3 nishi 151 
							free(l);
152 
							l = ok_strdup(line);
153 
							al = true;
154 
						}
11 nishi 155 
						if(al) {
3 nishi 156 
							char* ln = ok_strdup(l);
157 
							int j;
11 nishi 158 
							for(j = 0; ln[j] != 0; j++) {
159 
								if(ln[j] == ':') {
3 nishi 160 
									char* key = ln;
161 
									char* value = "";
162 
									ln[j] = 0;
163 
									j++;
11 nishi 164 
									for(; ln[j] != 0 && (ln[j] == '\t' || ln[j] == ' '); j++)
165 
										;
3 nishi 166 
									if(ln[j] != 0) value = ln + j;
11 nishi 167 
									if(strcasecmp(key, "From") == 0) {
3 nishi 168 
										if(news_entry.from != NULL) free(news_entry.from);
169 
										news_entry.from = ok_strdup(value);
11 nishi 170 
									} else if(strcasecmp(key, "Content-Type") == 0) {
3 nishi 171 
										int k = 0;
172 
										int incr2 = 0;
11 nishi 173 
										for(k = 0; k <= strlen(value); k++) {
174 
											if(value[k] == ';' || value[k] == 0) {
3 nishi 175 
												char* attr = malloc(k - incr2 + 1);
176 
												attr[k - incr2] = 0;
177 
												memcpy(attr, value + incr2, k - incr2);
178 
 
179 
												int in;
11 nishi 180 
												for(in = 0; attr[in] != 0; in++) {
181 
													if(attr[in] == '=') {
3 nishi 182 
														attr[in] = 0;
183 
 
11 nishi 184 
														if(strcasecmp(attr, "boundary") == 0) {
3 nishi 185 
															boundary = ok_strcat("--", attr + in + 1 + 1);
186 
															boundary[strlen(attr + in + 1 + 1) - 1 + 2] = 0;
187 
															ignore = true;
188 
														}
189 
 
190 
														break;
191 
													}
192 
												}
193 
 
194 
												free(attr);
195 
												k++;
11 nishi 196 
												for(; value[k] != 0 && (value[k] == ' ' || value[k] == '\t'); k++)
197 
													;
3 nishi 198 
												incr2 = k;
199 
											}
200 
										}
201 
									}
202 
								}
203 
							}
204 
							free(ln);
205 
						}
206 
						free(last);
207 
						free(line);
208 
					}
209 
					incr = i + 1;
210 
					newline = true;
11 nishi 211 
				} else {
3 nishi 212 
					newline = false;
213 
				}
11 nishi 214 
			} else {
3 nishi 215 
				newline = false;
216 
			}
217 
		}
218 
		free(l);
219 
 
220 
		free(buffer);
221 
		if(boundary != NULL) free(boundary);
222 
		return 0;
11 nishi 223 
	} else {
3 nishi 224 
		return 1;
225 
	}
226 
}
5 nishi 227 
 
11 nishi 228 
int ok_news_parse(int sock) {
5 nishi 229 
	char c;
230 
	int sta = 0;
231 
	bool st = false;
11 nishi 232 
	while(1) {
233 
		if(recv(sock, &c, 1, 0) <= 0) {
5 nishi 234 
			return -1;
235 
		}
236 
		if(c == '\n') break;
11 nishi 237 
		if(!st) {
238 
			if('0' <= c && c <= '9') {
5 nishi 239 
				sta *= 10;
240 
				sta += c - '0';
11 nishi 241 
			} else if(c == ' ') {
5 nishi 242 
				st = true;
243 
			}
244 
		}
245 
	}
246 
	return sta == 0 ? -1 : sta;
247 
}
248 
 
11 nishi 249 
int ok_news_write(const char* nick, const char* message) {
5 nishi 250 
	int nt_sock;
251 
	struct sockaddr_in nt_addr;
11 nishi 252 
	if((nt_sock = socket(PF_INET, SOCK_STREAM, 0)) < 0) {
5 nishi 253 
		fprintf(stderr, "Socket creation failure\n");
254 
		return 1;
255 
	}
256 
 
257 
	bzero((char*)&nt_addr, sizeof(nt_addr));
258 
	nt_addr.sin_family = PF_INET;
259 
	nt_addr.sin_addr.s_addr = inet_addr(nntpserver);
260 
	nt_addr.sin_port = htons(nntpport);
261 
 
262 
	int yes = 1;
263 
 
264 
	if(setsockopt(nt_sock, IPPROTO_TCP, TCP_NODELAY, (char*)&yes, sizeof(yes)) < 0) {
265 
		fprintf(stderr, "setsockopt failure");
266 
		ok_close(nt_sock);
267 
		return 1;
268 
	}
269 
 
11 nishi 270 
	if(connect(nt_sock, (struct sockaddr*)&nt_addr, sizeof(nt_addr)) < 0) {
5 nishi 271 
		fprintf(stderr, "Connection failure\n");
272 
		ok_close(nt_sock);
273 
		return 1;
274 
	}
275 
 
276 
	int sta;
277 
 
278 
	sta = ok_news_parse(nt_sock);
11 nishi 279 
	if(sta == 200 || sta == 201) {
5 nishi 280 
		char construct[1024];
11 nishi 281 
		if(nntpuser != NULL) {
5 nishi 282 
			sprintf(construct, "AUTHINFO USER %s\r\n", nntpuser);
283 
			send(nt_sock, construct, strlen(construct), 0);
284 
			sta = ok_news_parse(nt_sock);
11 nishi 285 
			if(sta != 381) {
5 nishi 286 
				goto cleanup;
287 
			}
288 
		}
11 nishi 289 
		if(nntppass != NULL) {
5 nishi 290 
			sprintf(construct, "AUTHINFO PASS %s\r\n", nntppass);
291 
			send(nt_sock, construct, strlen(construct), 0);
7 nishi 292 
			sta = ok_news_parse(nt_sock);
11 nishi 293 
			if(sta != 281) {
5 nishi 294 
				goto cleanup;
295 
			}
296 
		}
11 nishi 297 
		send(nt_sock, "MODE READER\r\n", 4 + 1 + 6 + 2, 0);
5 nishi 298 
		sta = ok_news_parse(nt_sock);
11 nishi 299 
		if(sta == 200 || sta == 201) {
5 nishi 300 
			send(nt_sock, "POST\r\n", 4 + 2, 0);
301 
			sta = ok_news_parse(nt_sock);
11 nishi 302 
			if(sta == 340) {
5 nishi 303 
				sprintf(construct, "From: %s\r\n", nntpfrom);
304 
				send(nt_sock, construct, strlen(construct), 0);
305 
				sprintf(construct, "Newsgroups: %s\r\n", nntpgroup);
306 
				send(nt_sock, construct, strlen(construct), 0);
7 nishi 307 
				sprintf(construct, "Subject: [IRC] Message from %s\r\n", nick);
5 nishi 308 
				send(nt_sock, construct, strlen(construct), 0);
9 nishi 309 
				sprintf(construct, "Content-Type: text/plain; charset=UTF-8\r\n", nick);
310 
				send(nt_sock, construct, strlen(construct), 0);
5 nishi 311 
				send(nt_sock, "\r\n", 2, 0);
312 
				char c;
313 
				int i;
314 
				bool first = true;
11 nishi 315 
				for(i = 0; message[i] != 0; i++) {
316 
					if(message[i] == '\n') {
5 nishi 317 
						send(nt_sock, "\r\n", 2, 0);
318 
						first = true;
11 nishi 319 
					} else {
320 
						if(first && message[i] == '.') {
5 nishi 321 
							send(nt_sock, message + i, 1, 0);
322 
						}
323 
						send(nt_sock, message + i, 1, 0);
324 
						first = false;
325 
					}
326 
				}
327 
				if(!first) send(nt_sock, "\r\n", 2, 0);
328 
				send(nt_sock, ".\r\n", 3, 0);
329 
				sta = ok_news_parse(nt_sock);
330 
				if(sta != 240) goto cleanup;
10 nishi 331 
				send(nt_sock, "QUIT\r\n", 6, 0);
332 
				sta = ok_news_parse(nt_sock);
333 
				if(sta != 205) goto cleanup;
11 nishi 334 
			} else {
5 nishi 335 
				goto cleanup;
336 
			}
11 nishi 337 
		} else {
5 nishi 338 
			goto cleanup;
339 
		}
11 nishi 340 
	} else {
5 nishi 341 
		goto cleanup;
342 
	}
343 
 
344 
	ok_close(nt_sock);
345 
	return 0;
346 
cleanup:
347 
	ok_close(nt_sock);
348 
	return 1;
349 
}