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3 nishi 1 
/* $Id: news.c 13 2024-09-12 15:29:22Z 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>
13 nishi 14 
#include <errno.h>
3 nishi 15 
 
5 nishi 16 
#include <sys/socket.h>
17 
#include <netinet/tcp.h>
18 
#include <arpa/inet.h>
19 
 
20 
#ifdef __FreeBSD__
21 
#include <netinet/in.h>
22 
#endif
23 
 
24 
extern char* nntpserver;
25 
extern char* nntpuser;
26 
extern char* nntppass;
27 
extern char* nntppath;
28 
extern char* nntpfrom;
29 
extern char* nntpgroup;
30 
extern char* nntpcount;
31 
extern int nntpport;
32 
 
3 nishi 33 
struct news_entry news_entry;
34 
 
5 nishi 35 
void ok_close(int sock);
36 
 
11 nishi 37 
void ok_news_init(void) {
3 nishi 38 
	news_entry.from = NULL;
39 
	news_entry.content = NULL;
40 
}
41 
 
11 nishi 42 
int ok_news_read(const char* path) {
43 
	if(news_entry.from != NULL) {
3 nishi 44 
		free(news_entry.from);
45 
		news_entry.from = NULL;
46 
	}
11 nishi 47 
	if(news_entry.content != NULL) {
3 nishi 48 
		free(news_entry.content);
49 
		news_entry.content = NULL;
50 
	}
51 
 
52 
	struct stat s;
11 nishi 53 
	if(stat(path, &s) == 0) {
3 nishi 54 
		char* boundary = NULL;
55 
		char* buffer = malloc(s.st_size + 1);
56 
		buffer[s.st_size] = 0;
57 
		FILE* f = fopen(path, "r");
58 
		fread(buffer, s.st_size, 1, f);
59 
 
60 
		uint64_t i;
61 
		bool newline = false;
62 
		int incr = 0;
63 
		char* l = malloc(1);
64 
		l[0] = 0;
65 
		bool header = true;
66 
		bool ignore = false;
67 
		bool bheader = false;
11 nishi 68 
		for(i = 0; i < s.st_size; i++) {
69 
			if(buffer[i] == '\r') {
70 
				if(buffer[i + 1] == '\n') {
3 nishi 71 
					/* newline */
72 
					i++;
11 nishi 73 
					if(!header) {
3 nishi 74 
						char* line = malloc(i - 1 - incr + 1);
75 
						line[i - 1 - incr] = 0;
76 
						memcpy(line, buffer + incr, i - 1 - incr);
77 
 
11 nishi 78 
						if(strcmp(line, ".") == 0) {
3 nishi 79 
							free(line);
80 
							break;
11 nishi 81 
						} else {
3 nishi 82 
							char* ln = line;
11 nishi 83 
							if(line[0] == '.') {
3 nishi 84 
								ln++;
85 
							}
86 
 
11 nishi 87 
							if(news_entry.content == NULL) {
3 nishi 88 
								news_entry.content = malloc(1);
89 
								news_entry.content[0] = 0;
90 
							}
91 
 
11 nishi 92 
							if(boundary != NULL && strcmp(ln, boundary) == 0) {
3 nishi 93 
								bheader = true;
94 
								ignore = true;
11 nishi 95 
							} else if(boundary != NULL && bheader && strlen(ln) == 0) {
3 nishi 96 
								bheader = false;
97 
								free(line);
98 
								incr = i + 1;
99 
								newline = true;
100 
								continue;
11 nishi 101 
							} else if(boundary != NULL && bheader) {
3 nishi 102 
								int j;
11 nishi 103 
								for(j = 0; j < strlen(ln); j++) {
104 
									if(ln[j] == ':') {
3 nishi 105 
										ln[j] = 0;
11 nishi 106 
										if(strcasecmp(ln, "Content-Type") == 0) {
3 nishi 107 
											ignore = false;
108 
											j++;
11 nishi 109 
											for(; ln[j] != 0 && (ln[j] == ' ' || ln[j] == '\t'); j++)
110 
												;
111 
											if(ln[j] != 0) {
3 nishi 112 
												char* v = ln + j;
113 
												int k;
11 nishi 114 
												for(k = 0; v[k] != 0; k++) {
115 
													if(v[k] == ';') {
3 nishi 116 
														v[k] = 0;
117 
														break;
118 
													}
119 
												}
11 nishi 120 
												if(strcasecmp(v, "text/plain") == 0) {
121 
												} else {
3 nishi 122 
													ignore = true;
123 
												}
124 
											}
125 
										}
126 
										break;
127 
									}
128 
								}
129 
							}
130 
 
11 nishi 131 
							if(!ignore && !bheader) {
3 nishi 132 
								char* tmp = news_entry.content;
133 
								news_entry.content = ok_strcat3(tmp, ln, "\n");
134 
								free(tmp);
135 
							}
136 
						}
137 
 
138 
						free(line);
11 nishi 139 
					} else if(newline) {
3 nishi 140 
						header = false;
11 nishi 141 
					} else {
3 nishi 142 
						char* line = malloc(i - 1 - incr + 1);
143 
						line[i - 1 - incr] = 0;
144 
						memcpy(line, buffer + incr, i - 1 - incr);
145 
 
146 
						char* last = ok_strdup(l);
147 
						char* tmp = l;
148 
						l = ok_strcat(tmp, line);
149 
						free(tmp);
150 
						bool al = false;
11 nishi 151 
						if(('a' <= line[0] && line[0] <= 'z') || ('A' <= line[0] && line[0] <= 'Z')) {
3 nishi 152 
							free(l);
153 
							l = ok_strdup(line);
154 
							al = true;
155 
						}
11 nishi 156 
						if(al) {
3 nishi 157 
							char* ln = ok_strdup(l);
158 
							int j;
11 nishi 159 
							for(j = 0; ln[j] != 0; j++) {
160 
								if(ln[j] == ':') {
3 nishi 161 
									char* key = ln;
162 
									char* value = "";
163 
									ln[j] = 0;
164 
									j++;
11 nishi 165 
									for(; ln[j] != 0 && (ln[j] == '\t' || ln[j] == ' '); j++)
166 
										;
3 nishi 167 
									if(ln[j] != 0) value = ln + j;
11 nishi 168 
									if(strcasecmp(key, "From") == 0) {
3 nishi 169 
										if(news_entry.from != NULL) free(news_entry.from);
170 
										news_entry.from = ok_strdup(value);
11 nishi 171 
									} else if(strcasecmp(key, "Content-Type") == 0) {
3 nishi 172 
										int k = 0;
173 
										int incr2 = 0;
11 nishi 174 
										for(k = 0; k <= strlen(value); k++) {
175 
											if(value[k] == ';' || value[k] == 0) {
3 nishi 176 
												char* attr = malloc(k - incr2 + 1);
177 
												attr[k - incr2] = 0;
178 
												memcpy(attr, value + incr2, k - incr2);
179 
 
180 
												int in;
11 nishi 181 
												for(in = 0; attr[in] != 0; in++) {
182 
													if(attr[in] == '=') {
3 nishi 183 
														attr[in] = 0;
184 
 
11 nishi 185 
														if(strcasecmp(attr, "boundary") == 0) {
3 nishi 186 
															boundary = ok_strcat("--", attr + in + 1 + 1);
187 
															boundary[strlen(attr + in + 1 + 1) - 1 + 2] = 0;
188 
															ignore = true;
189 
														}
190 
 
191 
														break;
192 
													}
193 
												}
194 
 
195 
												free(attr);
196 
												k++;
11 nishi 197 
												for(; value[k] != 0 && (value[k] == ' ' || value[k] == '\t'); k++)
198 
													;
3 nishi 199 
												incr2 = k;
200 
											}
201 
										}
202 
									}
203 
								}
204 
							}
205 
							free(ln);
206 
						}
207 
						free(last);
208 
						free(line);
209 
					}
210 
					incr = i + 1;
211 
					newline = true;
11 nishi 212 
				} else {
3 nishi 213 
					newline = false;
214 
				}
11 nishi 215 
			} else {
3 nishi 216 
				newline = false;
217 
			}
218 
		}
219 
		free(l);
220 
 
221 
		free(buffer);
222 
		if(boundary != NULL) free(boundary);
223 
		return 0;
11 nishi 224 
	} else {
3 nishi 225 
		return 1;
226 
	}
227 
}
5 nishi 228 
 
11 nishi 229 
int ok_news_parse(int sock) {
5 nishi 230 
	char c;
231 
	int sta = 0;
232 
	bool st = false;
11 nishi 233 
	while(1) {
234 
		if(recv(sock, &c, 1, 0) <= 0) {
5 nishi 235 
			return -1;
236 
		}
237 
		if(c == '\n') break;
11 nishi 238 
		if(!st) {
239 
			if('0' <= c && c <= '9') {
5 nishi 240 
				sta *= 10;
241 
				sta += c - '0';
11 nishi 242 
			} else if(c == ' ') {
5 nishi 243 
				st = true;
244 
			}
245 
		}
246 
	}
247 
	return sta == 0 ? -1 : sta;
248 
}
249 
 
11 nishi 250 
int ok_news_write(const char* nick, const char* message) {
5 nishi 251 
	int nt_sock;
252 
	struct sockaddr_in nt_addr;
11 nishi 253 
	if((nt_sock = socket(PF_INET, SOCK_STREAM, 0)) < 0) {
13 nishi 254 
		fprintf(stderr, "Socket creation failure: %s\n", strerror(errno));
5 nishi 255 
		return 1;
256 
	}
257 
 
258 
	bzero((char*)&nt_addr, sizeof(nt_addr));
259 
	nt_addr.sin_family = PF_INET;
260 
	nt_addr.sin_addr.s_addr = inet_addr(nntpserver);
261 
	nt_addr.sin_port = htons(nntpport);
262 
 
263 
	int yes = 1;
264 
 
265 
	if(setsockopt(nt_sock, IPPROTO_TCP, TCP_NODELAY, (char*)&yes, sizeof(yes)) < 0) {
266 
		fprintf(stderr, "setsockopt failure");
267 
		ok_close(nt_sock);
268 
		return 1;
269 
	}
270 
 
11 nishi 271 
	if(connect(nt_sock, (struct sockaddr*)&nt_addr, sizeof(nt_addr)) < 0) {
5 nishi 272 
		fprintf(stderr, "Connection failure\n");
273 
		ok_close(nt_sock);
274 
		return 1;
275 
	}
276 
 
277 
	int sta;
278 
 
279 
	sta = ok_news_parse(nt_sock);
11 nishi 280 
	if(sta == 200 || sta == 201) {
5 nishi 281 
		char construct[1024];
11 nishi 282 
		if(nntpuser != NULL) {
5 nishi 283 
			sprintf(construct, "AUTHINFO USER %s\r\n", nntpuser);
284 
			send(nt_sock, construct, strlen(construct), 0);
285 
			sta = ok_news_parse(nt_sock);
11 nishi 286 
			if(sta != 381) {
5 nishi 287 
				goto cleanup;
288 
			}
289 
		}
11 nishi 290 
		if(nntppass != NULL) {
5 nishi 291 
			sprintf(construct, "AUTHINFO PASS %s\r\n", nntppass);
292 
			send(nt_sock, construct, strlen(construct), 0);
7 nishi 293 
			sta = ok_news_parse(nt_sock);
11 nishi 294 
			if(sta != 281) {
5 nishi 295 
				goto cleanup;
296 
			}
297 
		}
11 nishi 298 
		send(nt_sock, "MODE READER\r\n", 4 + 1 + 6 + 2, 0);
5 nishi 299 
		sta = ok_news_parse(nt_sock);
11 nishi 300 
		if(sta == 200 || sta == 201) {
5 nishi 301 
			send(nt_sock, "POST\r\n", 4 + 2, 0);
302 
			sta = ok_news_parse(nt_sock);
11 nishi 303 
			if(sta == 340) {
5 nishi 304 
				sprintf(construct, "From: %s\r\n", nntpfrom);
305 
				send(nt_sock, construct, strlen(construct), 0);
306 
				sprintf(construct, "Newsgroups: %s\r\n", nntpgroup);
307 
				send(nt_sock, construct, strlen(construct), 0);
7 nishi 308 
				sprintf(construct, "Subject: [IRC] Message from %s\r\n", nick);
5 nishi 309 
				send(nt_sock, construct, strlen(construct), 0);
9 nishi 310 
				sprintf(construct, "Content-Type: text/plain; charset=UTF-8\r\n", nick);
311 
				send(nt_sock, construct, strlen(construct), 0);
5 nishi 312 
				send(nt_sock, "\r\n", 2, 0);
313 
				char c;
314 
				int i;
315 
				bool first = true;
11 nishi 316 
				for(i = 0; message[i] != 0; i++) {
317 
					if(message[i] == '\n') {
5 nishi 318 
						send(nt_sock, "\r\n", 2, 0);
319 
						first = true;
11 nishi 320 
					} else {
321 
						if(first && message[i] == '.') {
5 nishi 322 
							send(nt_sock, message + i, 1, 0);
323 
						}
324 
						send(nt_sock, message + i, 1, 0);
325 
						first = false;
326 
					}
327 
				}
328 
				if(!first) send(nt_sock, "\r\n", 2, 0);
329 
				send(nt_sock, ".\r\n", 3, 0);
330 
				sta = ok_news_parse(nt_sock);
331 
				if(sta != 240) goto cleanup;
10 nishi 332 
				send(nt_sock, "QUIT\r\n", 6, 0);
333 
				sta = ok_news_parse(nt_sock);
334 
				if(sta != 205) goto cleanup;
11 nishi 335 
			} else {
5 nishi 336 
				goto cleanup;
337 
			}
11 nishi 338 
		} else {
5 nishi 339 
			goto cleanup;
340 
		}
11 nishi 341 
	} else {
5 nishi 342 
		goto cleanup;
343 
	}
344 
 
345 
	ok_close(nt_sock);
346 
	return 0;
347 
cleanup:
348 
	ok_close(nt_sock);
349 
	return 1;
350 
}