/[LeafOK_CVS]/lbbs/src/bbs_net.c
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Revision 1.107 - (hide annotations)
Sat Dec 20 08:32:21 2025 UTC (2 months, 3 weeks ago) by sysadm
Branch: MAIN
Changes since 1.106: +50 -192 lines
Content type: text/x-csrc 
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1 sysadm 1.76 /* SPDX-License-Identifier: GPL-3.0-or-later */
2     /*
3     * bbs_net
4     * - user interactive feature of site shuttle
5     *
6 sysadm 1.77 * Copyright (C) 2004-2025 Leaflet <leaflet@leafok.com>
7 sysadm 1.76 */
8 sysadm 1.1
9 sysadm 1.81 #ifdef HAVE_CONFIG_H
10     #include "config.h"
11     #endif
12    
13 sysadm 1.1 #include "bbs.h"
14 sysadm 1.83 #include "bbs_net.h"
15 sysadm 1.1 #include "common.h"
16 sysadm 1.55 #include "io.h"
17 sysadm 1.15 #include "log.h"
18 sysadm 1.55 #include "login.h"
19     #include "menu.h"
20 sysadm 1.15 #include "screen.h"
21 sysadm 1.84 #include "str_process.h"
22 sysadm 1.55 #include <errno.h>
23     #include <fcntl.h>
24     #include <netdb.h>
25     #include <stdarg.h>
26 sysadm 1.1 #include <stdio.h>
27 sysadm 1.55 #include <stdlib.h>
28 sysadm 1.29 #include <string.h>
29     #include <time.h>
30     #include <unistd.h>
31 sysadm 1.55 #include <arpa/inet.h>
32 sysadm 1.84 #include <ctype.h>
33 sysadm 1.55 #include <libssh/libssh.h>
34     #include <libssh/server.h>
35     #include <libssh/callbacks.h>
36     #include <netinet/in.h>
37     #include <netinet/ip.h>
38 sysadm 1.29 #include <sys/select.h>
39 sysadm 1.1 #include <sys/ioctl.h>
40     #include <sys/socket.h>
41 sysadm 1.82
42     #ifdef HAVE_SYS_EPOLL_H
43 sysadm 1.38 #include <sys/epoll.h>
44 sysadm 1.82 #else
45     #include <poll.h>
46     #endif
47 sysadm 1.1
48 sysadm 1.80 static const char MENU_CONF_DELIM[] = " \t\r\n";
49 sysadm 1.26
50 sysadm 1.80 enum _bbs_net_constant_t
51     {
52     MAXSTATION = 26 * 2,
53     STATION_PER_LINE = 4,
54 sysadm 1.84 USERNAME_MAX_LEN = 20,
55     PASSWORD_MAX_LEN = 20,
56 sysadm 1.97 REMOTE_CONNECT_TIMEOUT = 10, // seconds
57     SSH_CONNECT_TIMEOUT = 5, // seconds
58     PROGRESS_BAR_LEN = 30,
59 sysadm 1.80 };
60 sysadm 1.1
61     struct _bbsnet_conf
62     {
63 sysadm 1.86 char org_name[40];
64     char site_name[40];
65     char host_name[IP_ADDR_LEN];
66 sysadm 1.93 char port[6];
67 sysadm 1.84 int8_t use_ssh;
68 sysadm 1.79 char charset[CHARSET_MAX_LEN + 1];
69 sysadm 1.1 } bbsnet_conf[MAXSTATION];
70    
71 sysadm 1.74 static MENU_SET bbsnet_menu;
72 sysadm 1.1
73 sysadm 1.89 static void unload_bbsnet_conf(void);
74    
75 sysadm 1.74 static int load_bbsnet_conf(const char *file_config)
76 sysadm 1.1 {
77 sysadm 1.14 FILE *fp;
78     MENU *p_menu;
79 sysadm 1.41 MENU_ITEM *p_menu_item;
80     MENU_ITEM_ID menu_item_id;
81 sysadm 1.86 char line[LINE_BUFFER_LEN], *t1, *t2, *t3, *t4, *t5, *t6, *saveptr;
82 sysadm 1.97 long port;
83     char *endptr;
84 sysadm 1.14
85 sysadm 1.89 unload_bbsnet_conf();
86 sysadm 1.14
87 sysadm 1.41 bbsnet_menu.p_menu_pool = calloc(1, sizeof(MENU));
88     if (bbsnet_menu.p_menu_pool == NULL)
89     {
90 sysadm 1.104 log_error("calloc(p_menu_pool) error");
91 sysadm 1.89 return -1;
92 sysadm 1.41 }
93     bbsnet_menu.menu_count = 1;
94    
95     bbsnet_menu.p_menu_item_pool = calloc(MAXSTATION, sizeof(MENU_ITEM));
96     if (bbsnet_menu.p_menu_item_pool == NULL)
97     {
98 sysadm 1.104 log_error("calloc(p_menu_item_pool) error");
99 sysadm 1.89 unload_bbsnet_conf();
100     return -1;
101 sysadm 1.41 }
102     bbsnet_menu.menu_item_count = MAXSTATION;
103    
104     p_menu = (MENU *)get_menu_by_id(&bbsnet_menu, 0);
105 sysadm 1.40
106 sysadm 1.21 strncpy(p_menu->name, "BBSNET", sizeof(p_menu->name) - 1);
107     p_menu->name[sizeof(p_menu->name) - 1] = '\0';
108 sysadm 1.14 p_menu->title.show = 0;
109 sysadm 1.41 p_menu->screen_show = 0;
110 sysadm 1.1
111 sysadm 1.89 fp = fopen(file_config, "r");
112     if (fp == NULL)
113     {
114     unload_bbsnet_conf();
115     return -2;
116     }
117    
118 sysadm 1.41 menu_item_id = 0;
119 sysadm 1.86 while (fgets(line, sizeof(line), fp) && menu_item_id < MAXSTATION)
120 sysadm 1.14 {
121 sysadm 1.86 t1 = strtok_r(line, MENU_CONF_DELIM, &saveptr);
122 sysadm 1.26 t2 = strtok_r(NULL, MENU_CONF_DELIM, &saveptr);
123     t3 = strtok_r(NULL, MENU_CONF_DELIM, &saveptr);
124     t4 = strtok_r(NULL, MENU_CONF_DELIM, &saveptr);
125 sysadm 1.60 t5 = strtok_r(NULL, MENU_CONF_DELIM, &saveptr);
126 sysadm 1.84 t6 = strtok_r(NULL, MENU_CONF_DELIM, &saveptr);
127 sysadm 1.14
128 sysadm 1.84 if (t1 == NULL || t2 == NULL || t3 == NULL || t4 == NULL ||
129 sysadm 1.97 t5 == NULL || t6 == NULL || t1[0] == '#')
130 sysadm 1.18 {
131 sysadm 1.14 continue;
132 sysadm 1.18 }
133    
134 sysadm 1.86 strncpy(bbsnet_conf[menu_item_id].site_name, t2, sizeof(bbsnet_conf[menu_item_id].site_name) - 1);
135     bbsnet_conf[menu_item_id].site_name[sizeof(bbsnet_conf[menu_item_id].site_name) - 1] = '\0';
136     strncpy(bbsnet_conf[menu_item_id].org_name, t1, sizeof(bbsnet_conf[menu_item_id].org_name) - 1);
137     bbsnet_conf[menu_item_id].org_name[sizeof(bbsnet_conf[menu_item_id].org_name) - 1] = '\0';
138     strncpy(bbsnet_conf[menu_item_id].host_name, t3, sizeof(bbsnet_conf[menu_item_id].host_name) - 1);
139     bbsnet_conf[menu_item_id].host_name[sizeof(bbsnet_conf[menu_item_id].host_name) - 1] = '\0';
140 sysadm 1.97 port = strtol(t4, &endptr, 10);
141     if (*endptr != '\0' || port <= 0 || port > 65535)
142 sysadm 1.89 {
143 sysadm 1.104 log_error("Invalid port value %ld of menu item %d", port, menu_item_id);
144 sysadm 1.89 fclose(fp);
145     unload_bbsnet_conf();
146     return -3;
147     }
148 sysadm 1.93 strncpy(bbsnet_conf[menu_item_id].port, t4, sizeof(bbsnet_conf[menu_item_id].port) - 1);
149     bbsnet_conf[menu_item_id].port[sizeof(bbsnet_conf[menu_item_id].port) - 1] = '\0';
150 sysadm 1.84 bbsnet_conf[menu_item_id].use_ssh = (toupper(t5[0]) == 'Y');
151     strncpy(bbsnet_conf[menu_item_id].charset, t6, sizeof(bbsnet_conf[menu_item_id].charset) - 1);
152 sysadm 1.60 bbsnet_conf[menu_item_id].charset[sizeof(bbsnet_conf[menu_item_id].charset) - 1] = '\0';
153 sysadm 1.14
154 sysadm 1.41 p_menu_item = get_menu_item_by_id(&bbsnet_menu, menu_item_id);
155     if (p_menu_item == NULL)
156     {
157 sysadm 1.104 log_error("get_menu_item_by_id(%d) return NULL pointer", menu_item_id);
158 sysadm 1.89 fclose(fp);
159     unload_bbsnet_conf();
160     return -3;
161 sysadm 1.41 }
162 sysadm 1.14
163 sysadm 1.41 p_menu_item->row = (int16_t)(2 + menu_item_id / STATION_PER_LINE);
164     p_menu_item->col = (int16_t)(5 + menu_item_id % STATION_PER_LINE * 20);
165     snprintf(p_menu_item->action, sizeof(p_menu_item->action), "%d", (int16_t)menu_item_id);
166     p_menu_item->submenu = 0;
167     p_menu_item->priv = 0;
168     p_menu_item->level = 0;
169     p_menu_item->name[0] =
170 sysadm 1.97 (char)(menu_item_id < MAXSTATION / 2 ? 'A' + menu_item_id : 'a' + menu_item_id - MAXSTATION / 2);
171 sysadm 1.41 p_menu_item->name[1] = '\0';
172 sysadm 1.89 snprintf(p_menu_item->text, sizeof(p_menu_item->text), "\033[1;36m%c.\033[m %s",
173 sysadm 1.86 p_menu_item->name[0], bbsnet_conf[menu_item_id].site_name);
174 sysadm 1.41
175     p_menu->items[p_menu->item_count] = menu_item_id;
176     p_menu->item_count++;
177     menu_item_id++;
178     }
179    
180     bbsnet_menu.menu_item_count = (int16_t)menu_item_id;
181     bbsnet_menu.menu_id_path[0] = 0;
182     bbsnet_menu.menu_item_pos[0] = 0;
183     bbsnet_menu.choose_step = 0;
184 sysadm 1.14
185 sysadm 1.41 fclose(fp);
186 sysadm 1.14
187     return 0;
188 sysadm 1.1 }
189    
190 sysadm 1.74 static void unload_bbsnet_conf(void)
191 sysadm 1.40 {
192 sysadm 1.41 bbsnet_menu.menu_count = 0;
193     bbsnet_menu.menu_item_count = 0;
194    
195 sysadm 1.89 if (bbsnet_menu.p_menu_pool)
196     {
197     free(bbsnet_menu.p_menu_pool);
198     bbsnet_menu.p_menu_pool = NULL;
199     }
200    
201     if (bbsnet_menu.p_menu_item_pool)
202     {
203     free(bbsnet_menu.p_menu_item_pool);
204     bbsnet_menu.p_menu_item_pool = NULL;
205     }
206 sysadm 1.40 }
207    
208 sysadm 1.97 static void progress_bar(int percent, int len)
209 sysadm 1.1 {
210 sysadm 1.97 char line[LINE_BUFFER_LEN];
211 sysadm 1.27 char buf[LINE_BUFFER_LEN];
212     char buf2[LINE_BUFFER_LEN];
213 sysadm 1.97 int pos;
214 sysadm 1.27
215 sysadm 1.98 if (len < 4)
216 sysadm 1.89 {
217 sysadm 1.98 len = 4;
218 sysadm 1.89 }
219 sysadm 1.98 else if (len + 2 > LINE_BUFFER_LEN)
220 sysadm 1.27 {
221 sysadm 1.98 len = LINE_BUFFER_LEN - 3;
222 sysadm 1.27 }
223 sysadm 1.97 if (percent < 0)
224 sysadm 1.27 {
225 sysadm 1.97 percent = 0;
226 sysadm 1.27 }
227 sysadm 1.97 else if (percent > 100)
228 sysadm 1.27 {
229 sysadm 1.97 percent = 100;
230 sysadm 1.27 }
231 sysadm 1.14
232 sysadm 1.97 pos = len * percent / 100;
233    
234     line[0] = ' ';
235     for (int i = 1; i <= len; i++)
236     {
237     line[i] = '-';
238     }
239     line[len + 1] = ' ';
240     line[len + 2] = '\0';
241    
242     snprintf(buf, sizeof(buf), "%*s%3d%%%*s",
243     (len - 4) / 2, "", percent, (len - 4 + 1) / 2, "");
244     memcpy(buf2, buf, (size_t)pos);
245     buf2[pos] = '\0';
246    
247 sysadm 1.84 moveto(4, 1);
248 sysadm 1.97 prints("%s\r\n", line);
249     prints("|\033[46m%s\033[44m%s\033[m|\r\n", buf2, buf + pos);
250     prints("%s\r\n", line);
251 sysadm 1.14 iflush();
252 sysadm 1.1 }
253    
254 sysadm 1.107 static int connect_timeout(struct timespec *p_ts_begin, struct timespec *p_ts_now,
255 sysadm 1.105 int total_time_ms, int *p_progress_last, int bar_len)
256     {
257 sysadm 1.107 long duration_ms;
258 sysadm 1.105 int progress;
259    
260     if (clock_gettime(CLOCK_REALTIME, p_ts_now) == -1)
261     {
262     log_error("clock_gettime() error (%d)", errno);
263     return -1;
264     }
265    
266 sysadm 1.107 duration_ms = (p_ts_now->tv_sec - p_ts_begin->tv_sec) * 1000 +
267     (p_ts_now->tv_nsec - p_ts_begin->tv_nsec) / 1000 / 1000;
268    
269     if (duration_ms >= total_time_ms)
270 sysadm 1.105 {
271 sysadm 1.107 progress_bar(100, bar_len);
272     prints("\033[1;31m连接超时！\033[m\r\n");
273     press_any_key();
274    
275     return 1;
276 sysadm 1.105 }
277 sysadm 1.107
278     progress = (int)(duration_ms * 100 / total_time_ms) + 1;
279 sysadm 1.105
280     if (progress != *p_progress_last)
281     {
282     *p_progress_last = progress;
283 sysadm 1.107 progress_bar(progress, bar_len);
284 sysadm 1.105 }
285    
286     return 0;
287     }
288    
289 sysadm 1.74 static int bbsnet_connect(int n)
290 sysadm 1.1 {
291 sysadm 1.89 int sock = -1;
292 sysadm 1.97 int ret = 0;
293 sysadm 1.89 int loop;
294     int error;
295 sysadm 1.38 int sock_connected = 0;
296 sysadm 1.107 int ssh_connected = 0;
297 sysadm 1.89 int flags_sock = -1;
298     int flags_stdin = -1;
299     int flags_stdout = -1;
300 sysadm 1.14 struct sockaddr_in sin;
301 sysadm 1.36 char input_buf[LINE_BUFFER_LEN];
302     char output_buf[LINE_BUFFER_LEN];
303     int input_buf_len = 0;
304     int output_buf_len = 0;
305     int input_buf_offset = 0;
306     int output_buf_offset = 0;
307 sysadm 1.60 char input_conv[LINE_BUFFER_LEN * 2];
308     char output_conv[LINE_BUFFER_LEN * 2];
309     int input_conv_len = 0;
310     int output_conv_len = 0;
311     int input_conv_offset = 0;
312     int output_conv_offset = 0;
313 sysadm 1.89 iconv_t input_cd = (iconv_t)(-1);
314     iconv_t output_cd = (iconv_t)(-1);
315     char tocode[CHARSET_MAX_LEN + 20];
316 sysadm 1.82
317     #ifdef HAVE_SYS_EPOLL_H
318 sysadm 1.38 struct epoll_event ev, events[MAX_EVENTS];
319 sysadm 1.89 int epollfd = -1;
320 sysadm 1.82 #else
321     struct pollfd pfds[3];
322     #endif
323    
324     int nfds;
325 sysadm 1.38 int stdin_read_wait = 0;
326     int stdout_write_wait = 0;
327     int sock_read_wait = 0;
328     int sock_write_wait = 0;
329 sysadm 1.93 struct addrinfo hints, *res = NULL;
330 sysadm 1.31 int tos;
331 sysadm 1.93 char remote_addr[INET_ADDRSTRLEN];
332 sysadm 1.14 int remote_port;
333 sysadm 1.93 char local_addr[INET_ADDRSTRLEN];
334 sysadm 1.63 int local_port;
335     socklen_t sock_len;
336 sysadm 1.97 time_t t_begin, t_used;
337     struct timespec ts_begin, ts_now;
338 sysadm 1.105 int progress_last = 0;
339 sysadm 1.26 int ch;
340 sysadm 1.84 char remote_user[USERNAME_MAX_LEN + 1];
341     char remote_pass[PASSWORD_MAX_LEN + 1];
342 sysadm 1.97 ssh_session outbound_session = NULL;
343     ssh_channel outbound_channel = NULL;
344 sysadm 1.84 int ssh_process_config = 0;
345 sysadm 1.88 int ssh_log_level = SSH_LOG_NOLOG;
346 sysadm 1.14
347 sysadm 1.53 if (user_online_update("BBS_NET") < 0)
348     {
349 sysadm 1.104 log_error("user_online_update(BBS_NET) error");
350 sysadm 1.53 }
351    
352 sysadm 1.84 if (bbsnet_conf[n].use_ssh)
353     {
354     clearscr();
355    
356     if (!SSH_v2)
357     {
358     moveto(1, 1);
359     prints("只有在以SSH方式登陆本站时，才能使用SSH站点穿梭。");
360     press_any_key();
361     return 0;
362     }
363    
364     moveto(1, 1);
365 sysadm 1.86 prints("通过SSH方式连接[%s]...", bbsnet_conf[n].site_name);
366 sysadm 1.84 moveto(2, 1);
367     prints("请输入用户名: ");
368     iflush();
369     if (str_input(remote_user, sizeof(remote_user), DOECHO) < 0)
370     {
371     return -1;
372     }
373     if (remote_user[0] == '\0')
374     {
375     return 0;
376     }
377    
378     moveto(3, 1);
379     prints("请输入密码: ");
380     iflush();
381     if (str_input(remote_pass, sizeof(remote_pass), NOECHO) < 0)
382     {
383     return -1;
384     }
385     if (remote_pass[0] == '\0')
386     {
387     return 0;
388     }
389     }
390    
391 sysadm 1.14 clearscr();
392    
393 sysadm 1.84 moveto(1, 1);
394 sysadm 1.57 prints("\033[1;32m正在测试往 %s (%s) 的连接，请稍候... \033[m\r\n",
395 sysadm 1.86 bbsnet_conf[n].site_name, bbsnet_conf[n].host_name);
396 sysadm 1.105 prints("\033[1;32m连接进行中，按\033[1;33mCtrl+C\033[1;32m中断。\033[m\r\n");
397     progress_bar(0, PROGRESS_BAR_LEN);
398    
399     if (clock_gettime(CLOCK_REALTIME, &ts_begin) == -1)
400     {
401     log_error("clock_gettime() error (%d)", errno);
402     ret = -1;
403     goto cleanup;
404     }
405     ts_now = ts_begin;
406 sysadm 1.14
407 sysadm 1.93 memset(&hints, 0, sizeof(hints));
408     hints.ai_family = AF_INET;
409     hints.ai_socktype = SOCK_STREAM;
410     hints.ai_protocol = IPPROTO_TCP;
411 sysadm 1.14
412 sysadm 1.93 if ((ret = getaddrinfo(BBS_address, NULL, &hints, &res)) != 0)
413 sysadm 1.1 {
414 sysadm 1.104 log_error("getaddrinfo() error (%d): %s", ret, gai_strerror(ret));
415 sysadm 1.97 ret = -1;
416 sysadm 1.89 goto cleanup;
417 sysadm 1.1 }
418 sysadm 1.14
419 sysadm 1.97 if (inet_ntop(AF_INET, &(((struct sockaddr_in *)res->ai_addr)->sin_addr), local_addr, sizeof(local_addr)) == NULL)
420 sysadm 1.93 {
421 sysadm 1.104 log_error("inet_ntop() error (%d)", errno);
422 sysadm 1.97 ret = -1;
423 sysadm 1.93 goto cleanup;
424     }
425     local_port = ntohs(((struct sockaddr_in *)res->ai_addr)->sin_port);
426 sysadm 1.14
427 sysadm 1.93 sock = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
428 sysadm 1.14 if (sock < 0)
429 sysadm 1.1 {
430 sysadm 1.104 log_error("socket() error (%d)", errno);
431 sysadm 1.97 ret = -1;
432 sysadm 1.93 goto cleanup;
433     }
434    
435     if (bind(sock, res->ai_addr, res->ai_addrlen) < 0)
436     {
437 sysadm 1.104 log_error("bind(%s:%u) error (%d)", local_addr, local_port, errno);
438 sysadm 1.97 ret = -1;
439 sysadm 1.89 goto cleanup;
440 sysadm 1.1 }
441    
442 sysadm 1.93 freeaddrinfo(res);
443     res = NULL;
444    
445     memset(&hints, 0, sizeof(hints));
446     hints.ai_family = AF_INET;
447     hints.ai_flags = AI_NUMERICSERV;
448     hints.ai_socktype = SOCK_STREAM;
449     hints.ai_protocol = IPPROTO_TCP;
450 sysadm 1.14
451 sysadm 1.93 if ((ret = getaddrinfo(bbsnet_conf[n].host_name, bbsnet_conf[n].port, &hints, &res)) != 0)
452 sysadm 1.14 {
453 sysadm 1.104 log_error("getaddrinfo() error (%d): %s", ret, gai_strerror(ret));
454 sysadm 1.93 prints("\033[1;31m查找主机名失败！\033[m\r\n");
455     press_any_key();
456 sysadm 1.97 ret = -1;
457 sysadm 1.89 goto cleanup;
458 sysadm 1.14 }
459 sysadm 1.1
460 sysadm 1.97 if (inet_ntop(AF_INET, &(((struct sockaddr_in *)res->ai_addr)->sin_addr), remote_addr, sizeof(remote_addr)) == NULL)
461 sysadm 1.93 {
462 sysadm 1.104 log_error("inet_ntop() error (%d)", errno);
463 sysadm 1.97 ret = -1;
464 sysadm 1.93 goto cleanup;
465     }
466     remote_port = ntohs(((struct sockaddr_in *)res->ai_addr)->sin_port);
467 sysadm 1.14
468 sysadm 1.39 // Set socket as non-blocking
469 sysadm 1.89 if ((flags_sock = fcntl(sock, F_GETFL, 0)) == -1)
470     {
471 sysadm 1.104 log_error("fcntl(F_GETFL) error (%d)", errno);
472 sysadm 1.97 ret = -1;
473 sysadm 1.89 goto cleanup;
474     }
475     if ((fcntl(sock, F_SETFL, flags_sock | O_NONBLOCK)) == -1)
476     {
477 sysadm 1.104 log_error("fcntl(F_SETFL) error (%d)", errno);
478 sysadm 1.97 ret = -1;
479 sysadm 1.89 goto cleanup;
480     }
481 sysadm 1.39
482     // Set STDIN/STDOUT as non-blocking
483 sysadm 1.89 if ((flags_stdin = fcntl(STDIN_FILENO, F_GETFL, 0)) == -1)
484     {
485 sysadm 1.104 log_error("fcntl(F_GETFL) error (%d)", errno);
486 sysadm 1.97 ret = -1;
487 sysadm 1.89 goto cleanup;
488     }
489     if ((flags_stdout = fcntl(STDOUT_FILENO, F_GETFL, 0)) == -1)
490     {
491 sysadm 1.104 log_error("fcntl(F_GETFL) error (%d)", errno);
492 sysadm 1.97 ret = -1;
493 sysadm 1.89 goto cleanup;
494     }
495     if ((fcntl(STDIN_FILENO, F_SETFL, flags_stdin | O_NONBLOCK)) == -1)
496     {
497 sysadm 1.104 log_error("fcntl(F_SETFL) error (%d)", errno);
498 sysadm 1.97 ret = -1;
499 sysadm 1.89 goto cleanup;
500     }
501     if ((fcntl(STDOUT_FILENO, F_SETFL, flags_stdout | O_NONBLOCK)) == -1)
502     {
503 sysadm 1.104 log_error("fcntl(F_SETFL) error (%d)", errno);
504 sysadm 1.97 ret = -1;
505 sysadm 1.89 goto cleanup;
506     }
507 sysadm 1.39
508 sysadm 1.82 #ifdef HAVE_SYS_EPOLL_H
509 sysadm 1.38 epollfd = epoll_create1(0);
510     if (epollfd < 0)
511     {
512 sysadm 1.104 log_error("epoll_create1() error (%d)", errno);
513 sysadm 1.97 ret = -1;
514 sysadm 1.89 goto cleanup;
515 sysadm 1.38 }
516    
517 sysadm 1.59 ev.events = EPOLLOUT | EPOLLET;
518 sysadm 1.38 ev.data.fd = sock;
519     if (epoll_ctl(epollfd, EPOLL_CTL_ADD, sock, &ev) == -1)
520     {
521 sysadm 1.104 log_error("epoll_ctl(socket) error (%d)", errno);
522 sysadm 1.97 ret = -1;
523 sysadm 1.39 goto cleanup;
524 sysadm 1.38 }
525    
526 sysadm 1.59 ev.events = EPOLLIN | EPOLLET;
527 sysadm 1.38 ev.data.fd = STDIN_FILENO;
528     if (epoll_ctl(epollfd, EPOLL_CTL_ADD, STDIN_FILENO, &ev) == -1)
529     {
530 sysadm 1.104 log_error("epoll_ctl(STDIN_FILENO) error (%d)", errno);
531 sysadm 1.97 ret = -1;
532 sysadm 1.39 goto cleanup;
533 sysadm 1.38 }
534 sysadm 1.82 #endif
535 sysadm 1.38
536 sysadm 1.107 while (!SYS_server_exit &&
537     !connect_timeout(&ts_begin, &ts_now, REMOTE_CONNECT_TIMEOUT * 1000, &progress_last, PROGRESS_BAR_LEN))
538 sysadm 1.29 {
539 sysadm 1.97 if ((ret = connect(sock, res->ai_addr, res->ai_addrlen)) == 0)
540     {
541     sock_connected = 1;
542     break;
543     }
544     else if (ret < 0)
545 sysadm 1.29 {
546 sysadm 1.38 if (errno == EAGAIN || errno == EALREADY || errno == EINPROGRESS)
547     {
548     // Use select / epoll to check writability of the socket,
549     // then use getsockopt to check the status of the socket.
550     // See man connect(2)
551     break;
552     }
553     else if (errno == EINTR)
554     {
555     }
556     else
557     {
558 sysadm 1.104 log_error("connect(socket) error (%d)", errno);
559 sysadm 1.57 prints("\033[1;31m连接失败！\033[m\r\n");
560 sysadm 1.38 press_any_key();
561 sysadm 1.97 ret = -1;
562 sysadm 1.39 goto cleanup;
563 sysadm 1.38 }
564 sysadm 1.29 }
565     }
566    
567 sysadm 1.107 while (!SYS_server_exit && !sock_connected &&
568     !connect_timeout(&ts_begin, &ts_now, REMOTE_CONNECT_TIMEOUT * 1000, &progress_last, PROGRESS_BAR_LEN))
569 sysadm 1.1 {
570 sysadm 1.82 #ifdef HAVE_SYS_EPOLL_H
571 sysadm 1.97 nfds = epoll_wait(epollfd, events, MAX_EVENTS, 100); // 0.1 second
572 sysadm 1.82 ret = nfds;
573     #else
574     pfds[0].fd = sock;
575     pfds[0].events = POLLOUT;
576     pfds[1].fd = STDIN_FILENO;
577     pfds[1].events = POLLIN;
578     nfds = 2;
579 sysadm 1.97 ret = poll(pfds, (nfds_t)nfds, 100); // 0.1 second
580 sysadm 1.82 #endif
581 sysadm 1.29
582 sysadm 1.82 if (ret < 0)
583 sysadm 1.20 {
584 sysadm 1.29 if (errno != EINTR)
585     {
586 sysadm 1.82 #ifdef HAVE_SYS_EPOLL_H
587 sysadm 1.104 log_error("epoll_wait() error (%d)", errno);
588 sysadm 1.82 #else
589 sysadm 1.104 log_error("poll() error (%d)", errno);
590 sysadm 1.82 #endif
591 sysadm 1.39 break;
592 sysadm 1.29 }
593 sysadm 1.20 }
594 sysadm 1.82 else if (ret == 0) // timeout
595 sysadm 1.38 {
596     }
597     else // ret > 0
598 sysadm 1.14 {
599 sysadm 1.38 for (int i = 0; i < nfds; i++)
600 sysadm 1.29 {
601 sysadm 1.82 #ifdef HAVE_SYS_EPOLL_H
602 sysadm 1.38 if (events[i].data.fd == sock)
603 sysadm 1.82 #else
604     if (pfds[i].fd == sock && (pfds[i].revents & POLLOUT))
605     #endif
606 sysadm 1.38 {
607 sysadm 1.89 socklen_t len = sizeof(error);
608     if (getsockopt(sock, SOL_SOCKET, SO_ERROR, &error, &len) < 0)
609 sysadm 1.38 {
610 sysadm 1.104 log_error("getsockopt() error (%d) !", errno);
611 sysadm 1.97 ret = -1;
612 sysadm 1.39 goto cleanup;
613 sysadm 1.38 }
614     if (error == 0)
615     {
616     sock_connected = 1;
617 sysadm 1.97 break;
618 sysadm 1.38 }
619     }
620 sysadm 1.82 #ifdef HAVE_SYS_EPOLL_H
621 sysadm 1.38 else if (events[i].data.fd == STDIN_FILENO)
622 sysadm 1.82 #else
623     else if (pfds[i].fd == STDIN_FILENO && (pfds[i].revents & POLLIN))
624     #endif
625 sysadm 1.38 {
626 sysadm 1.84 do
627     {
628     ch = igetch(0);
629     } while (ch == 0);
630 sysadm 1.45 if (ch == Ctrl('C') || ch == KEY_ESC)
631 sysadm 1.38 {
632 sysadm 1.97 ret = 0;
633 sysadm 1.39 goto cleanup;
634 sysadm 1.38 }
635     }
636 sysadm 1.29 }
637 sysadm 1.14 }
638 sysadm 1.38 }
639     if (!sock_connected)
640 sysadm 1.12 {
641 sysadm 1.97 ret = -1;
642 sysadm 1.39 goto cleanup;
643 sysadm 1.12 }
644 sysadm 1.29
645 sysadm 1.31 tos = IPTOS_LOWDELAY;
646     if (setsockopt(sock, IPPROTO_IP, IP_TOS, &tos, sizeof(tos)) < 0)
647     {
648 sysadm 1.104 log_error("setsockopt IP_TOS=%d error (%d)", tos, errno);
649 sysadm 1.31 }
650 sysadm 1.14
651 sysadm 1.63 sock_len = sizeof(sin);
652     if (getsockname(sock, (struct sockaddr *)&sin, &sock_len) < 0)
653     {
654     log_error("getsockname() error: %d", errno);
655 sysadm 1.97 ret = -1;
656 sysadm 1.63 goto cleanup;
657     }
658    
659 sysadm 1.97 if (inet_ntop(AF_INET, &(sin.sin_addr), local_addr, sizeof(local_addr)) == NULL)
660     {
661 sysadm 1.104 log_error("inet_ntop() error (%d)", errno);
662 sysadm 1.97 ret = -1;
663     goto cleanup;
664     }
665 sysadm 1.63 local_port = ntohs(sin.sin_port);
666    
667 sysadm 1.84 if (bbsnet_conf[n].use_ssh)
668     {
669 sysadm 1.97 outbound_session = ssh_new();
670     if (outbound_session == NULL)
671 sysadm 1.84 {
672 sysadm 1.104 log_error("ssh_new() error");
673 sysadm 1.97 ret = -1;
674 sysadm 1.84 goto cleanup;
675     }
676    
677 sysadm 1.97 if (ssh_options_set(outbound_session, SSH_OPTIONS_FD, &sock) < 0 ||
678     ssh_options_set(outbound_session, SSH_OPTIONS_PROCESS_CONFIG, &ssh_process_config) < 0 ||
679     ssh_options_set(outbound_session, SSH_OPTIONS_KNOWNHOSTS, SSH_KNOWN_HOSTS_FILE) < 0 ||
680     ssh_options_set(outbound_session, SSH_OPTIONS_HOST, bbsnet_conf[n].host_name) < 0 ||
681     ssh_options_set(outbound_session, SSH_OPTIONS_USER, remote_user) < 0 ||
682     ssh_options_set(outbound_session, SSH_OPTIONS_HOSTKEYS, "+ssh-ed25519,ecdsa-sha2-nistp256,ssh-rsa") < 0 ||
683     ssh_options_set(outbound_session, SSH_OPTIONS_LOG_VERBOSITY, &ssh_log_level) < 0)
684 sysadm 1.84 {
685 sysadm 1.104 log_error("Error setting SSH options: %s", ssh_get_error(outbound_session));
686 sysadm 1.97 ret = -1;
687 sysadm 1.84 goto cleanup;
688     }
689    
690 sysadm 1.97 ssh_set_blocking(outbound_session, 0);
691 sysadm 1.85
692 sysadm 1.107 ssh_connected = 0;
693     while (!SYS_server_exit &&
694     !connect_timeout(&ts_begin, &ts_now, REMOTE_CONNECT_TIMEOUT * 1000, &progress_last, PROGRESS_BAR_LEN))
695 sysadm 1.84 {
696 sysadm 1.97 ret = ssh_connect(outbound_session);
697 sysadm 1.84 if (ret == SSH_OK)
698     {
699 sysadm 1.107 ssh_connected = 1;
700 sysadm 1.84 break;
701     }
702 sysadm 1.90 else if (ret == SSH_AGAIN)
703     {
704 sysadm 1.104 // log_debug("ssh_connect() error: SSH_AGAIN");
705 sysadm 1.90 }
706     else // if (ret == SSH_ERROR)
707 sysadm 1.84 {
708 sysadm 1.104 log_error("ssh_connect() error: SSH_ERROR");
709 sysadm 1.97 ret = -1;
710 sysadm 1.84 goto cleanup;
711     }
712     }
713 sysadm 1.107 if (!ssh_connected)
714 sysadm 1.90 {
715 sysadm 1.97 ret = -1;
716 sysadm 1.90 goto cleanup;
717     }
718 sysadm 1.84
719 sysadm 1.97 ret = ssh_session_is_known_server(outbound_session);
720 sysadm 1.85 switch (ret)
721     {
722     case SSH_KNOWN_HOSTS_NOT_FOUND:
723     case SSH_KNOWN_HOSTS_UNKNOWN:
724 sysadm 1.97 if (ssh_session_update_known_hosts(outbound_session) != SSH_OK)
725 sysadm 1.85 {
726 sysadm 1.104 log_error("ssh_session_update_known_hosts(%s) error", bbsnet_conf[n].host_name);
727 sysadm 1.90 prints("\033[1;31m无法添加服务器证书\033[m\r\n");
728 sysadm 1.85 press_any_key();
729 sysadm 1.97 ret = -1;
730 sysadm 1.85 goto cleanup;
731     }
732 sysadm 1.104 log_common("SSH key of (%s) is added into %s", bbsnet_conf[n].host_name, SSH_KNOWN_HOSTS_FILE);
733 sysadm 1.85 case SSH_KNOWN_HOSTS_OK:
734     break;
735     case SSH_KNOWN_HOSTS_CHANGED:
736     case SSH_KNOWN_HOSTS_OTHER:
737 sysadm 1.104 log_error("ssh_session_is_known_server(%s) error: %d", bbsnet_conf[n].host_name, ret);
738 sysadm 1.90 prints("\033[1;31m服务器证书已变更\033[m\r\n");
739 sysadm 1.85 press_any_key();
740 sysadm 1.97 ret = -1;
741 sysadm 1.85 goto cleanup;
742     }
743 sysadm 1.84
744 sysadm 1.107 ssh_connected = 0;
745     while (!SYS_server_exit &&
746     !connect_timeout(&ts_begin, &ts_now, REMOTE_CONNECT_TIMEOUT * 1000, &progress_last, PROGRESS_BAR_LEN))
747 sysadm 1.84 {
748 sysadm 1.97 ret = ssh_userauth_password(outbound_session, NULL, remote_pass);
749 sysadm 1.84 if (ret == SSH_AUTH_SUCCESS)
750     {
751 sysadm 1.107 ssh_connected = 1;
752 sysadm 1.84 break;
753     }
754     else if (ret == SSH_AUTH_AGAIN)
755     {
756 sysadm 1.104 // log_debug("ssh_userauth_password() error: SSH_AUTH_AGAIN");
757 sysadm 1.84 }
758     else if (ret == SSH_AUTH_ERROR)
759     {
760 sysadm 1.104 log_error("ssh_userauth_password() error: SSH_AUTH_ERROR");
761 sysadm 1.97 ret = -1;
762 sysadm 1.84 goto cleanup;
763     }
764     else // if (ret == SSH_AUTH_DENIED)
765     {
766 sysadm 1.105 log_debug("ssh_userauth_password() error: SSH_AUTH_DENIED");
767 sysadm 1.84 prints("\033[1;31m身份验证失败！\033[m\r\n");
768 sysadm 1.90 press_any_key();
769 sysadm 1.105 ret = 0;
770     goto cleanup;
771     }
772 sysadm 1.84 }
773 sysadm 1.107 if (!ssh_connected)
774 sysadm 1.90 {
775 sysadm 1.97 ret = -1;
776 sysadm 1.90 goto cleanup;
777     }
778 sysadm 1.84
779 sysadm 1.97 outbound_channel = ssh_channel_new(outbound_session);
780     if (outbound_channel == NULL)
781 sysadm 1.84 {
782 sysadm 1.104 log_error("ssh_channel_new() error");
783 sysadm 1.97 ret = -1;
784 sysadm 1.84 goto cleanup;
785     }
786    
787 sysadm 1.107 ssh_connected = 0;
788     while (!SYS_server_exit &&
789     !connect_timeout(&ts_begin, &ts_now, REMOTE_CONNECT_TIMEOUT * 1000, &progress_last, PROGRESS_BAR_LEN))
790 sysadm 1.84 {
791 sysadm 1.97 ret = ssh_channel_open_session(outbound_channel);
792 sysadm 1.84 if (ret == SSH_OK)
793     {
794 sysadm 1.107 ssh_connected = 1;
795 sysadm 1.84 break;
796     }
797 sysadm 1.90 else if (ret == SSH_AGAIN)
798     {
799 sysadm 1.104 // log_debug("ssh_channel_open_session() error: SSH_AGAIN");
800 sysadm 1.90 }
801     else // if (ret == SSH_ERROR)
802 sysadm 1.84 {
803 sysadm 1.104 log_error("ssh_channel_open_session() error: SSH_ERROR");
804 sysadm 1.97 ret = -1;
805 sysadm 1.84 goto cleanup;
806     }
807     }
808 sysadm 1.107 if (!ssh_connected)
809 sysadm 1.90 {
810 sysadm 1.97 ret = -1;
811 sysadm 1.90 goto cleanup;
812     }
813 sysadm 1.84
814 sysadm 1.107 ssh_connected = 0;
815     while (!SYS_server_exit &&
816     !connect_timeout(&ts_begin, &ts_now, REMOTE_CONNECT_TIMEOUT * 1000, &progress_last, PROGRESS_BAR_LEN))
817 sysadm 1.84 {
818 sysadm 1.97 ret = ssh_channel_request_pty(outbound_channel);
819 sysadm 1.84 if (ret == SSH_OK)
820     {
821 sysadm 1.107 ssh_connected = 1;
822 sysadm 1.84 break;
823     }
824 sysadm 1.90 else if (ret == SSH_AGAIN)
825     {
826 sysadm 1.104 // log_debug("ssh_channel_request_pty() error: SSH_AGAIN");
827 sysadm 1.90 }
828     else // if (ret == SSH_ERROR)
829 sysadm 1.84 {
830 sysadm 1.104 log_error("ssh_channel_request_pty() error: SSH_ERROR");
831 sysadm 1.97 ret = -1;
832 sysadm 1.84 goto cleanup;
833     }
834     }
835 sysadm 1.107 if (!ssh_connected)
836 sysadm 1.90 {
837 sysadm 1.97 ret = -1;
838 sysadm 1.90 goto cleanup;
839     }
840 sysadm 1.84
841 sysadm 1.107 ssh_connected = 0;
842     while (!SYS_server_exit &&
843     !connect_timeout(&ts_begin, &ts_now, REMOTE_CONNECT_TIMEOUT * 1000, &progress_last, PROGRESS_BAR_LEN))
844 sysadm 1.84 {
845 sysadm 1.97 ret = ssh_channel_request_shell(outbound_channel);
846 sysadm 1.84 if (ret == SSH_OK)
847     {
848 sysadm 1.107 ssh_connected = 1;
849 sysadm 1.84 break;
850     }
851 sysadm 1.90 else if (ret == SSH_AGAIN)
852     {
853 sysadm 1.104 // log_debug("ssh_channel_request_shell() error: SSH_AGAIN");
854 sysadm 1.90 }
855     else // if (ret == SSH_ERROR)
856 sysadm 1.84 {
857 sysadm 1.104 log_error("ssh_channel_request_shell() error: SSH_ERROR");
858 sysadm 1.97 ret = -1;
859 sysadm 1.84 goto cleanup;
860     }
861     }
862 sysadm 1.107 if (!ssh_connected)
863 sysadm 1.89 {
864 sysadm 1.97 ret = -1;
865 sysadm 1.89 goto cleanup;
866     }
867 sysadm 1.84 }
868    
869 sysadm 1.57 prints("\033[1;31m连接成功！\033[m\r\n");
870 sysadm 1.33 iflush();
871 sysadm 1.104 log_common("BBSNET connect to %s:%d from %s:%d by [%s]",
872 sysadm 1.63 remote_addr, remote_port, local_addr, local_port, BBS_username);
873 sysadm 1.14
874 sysadm 1.71 snprintf(tocode, sizeof(tocode), "%s%s", bbsnet_conf[n].charset,
875     (strcasecmp(stdio_charset, bbsnet_conf[n].charset) == 0 ? "" : "//IGNORE"));
876 sysadm 1.68 input_cd = iconv_open(tocode, stdio_charset);
877 sysadm 1.60 if (input_cd == (iconv_t)(-1))
878     {
879 sysadm 1.104 log_error("iconv_open(%s->%s) error: %d", stdio_charset, tocode, errno);
880 sysadm 1.97 ret = -1;
881 sysadm 1.60 goto cleanup;
882     }
883 sysadm 1.68
884 sysadm 1.71 snprintf(tocode, sizeof(tocode), "%s%s", stdio_charset,
885     (strcasecmp(bbsnet_conf[n].charset, stdio_charset) == 0 ? "" : "//TRANSLIT"));
886 sysadm 1.70 output_cd = iconv_open(tocode, bbsnet_conf[n].charset);
887 sysadm 1.67 if (output_cd == (iconv_t)(-1))
888 sysadm 1.60 {
889 sysadm 1.104 log_error("iconv_open(%s->%s) error: %d", bbsnet_conf[n].charset, tocode, errno);
890 sysadm 1.97 ret = -1;
891 sysadm 1.60 goto cleanup;
892     }
893    
894 sysadm 1.82 #ifdef HAVE_SYS_EPOLL_H
895 sysadm 1.38 ev.events = EPOLLIN | EPOLLOUT | EPOLLET;
896     ev.data.fd = sock;
897     if (epoll_ctl(epollfd, EPOLL_CTL_MOD, sock, &ev) == -1)
898     {
899 sysadm 1.104 log_error("epoll_ctl(socket) error (%d)", errno);
900 sysadm 1.97 ret = -1;
901 sysadm 1.39 goto cleanup;
902 sysadm 1.38 }
903    
904 sysadm 1.59 ev.events = EPOLLOUT | EPOLLET;
905 sysadm 1.38 ev.data.fd = STDOUT_FILENO;
906     if (epoll_ctl(epollfd, EPOLL_CTL_ADD, STDOUT_FILENO, &ev) == -1)
907     {
908 sysadm 1.104 log_error("epoll_ctl(STDOUT_FILENO) error (%d)", errno);
909 sysadm 1.97 ret = -1;
910 sysadm 1.39 goto cleanup;
911 sysadm 1.38 }
912 sysadm 1.82 #endif
913 sysadm 1.38
914 sysadm 1.97 BBS_last_access_tm = t_begin = time(NULL);
915 sysadm 1.14 loop = 1;
916    
917 sysadm 1.26 while (loop && !SYS_server_exit)
918 sysadm 1.12 {
919 sysadm 1.47 if (SSH_v2 && ssh_channel_is_closed(SSH_channel))
920     {
921 sysadm 1.104 log_debug("SSH channel is closed");
922 sysadm 1.47 loop = 0;
923     break;
924     }
925    
926 sysadm 1.97 if (bbsnet_conf[n].use_ssh && ssh_channel_is_closed(outbound_channel))
927 sysadm 1.84 {
928 sysadm 1.104 log_debug("Outbound channel is closed");
929 sysadm 1.84 loop = 0;
930     break;
931     }
932    
933 sysadm 1.82 #ifdef HAVE_SYS_EPOLL_H
934 sysadm 1.38 nfds = epoll_wait(epollfd, events, MAX_EVENTS, 100); // 0.1 second
935 sysadm 1.82 ret = nfds;
936     #else
937     pfds[0].fd = STDIN_FILENO;
938     pfds[0].events = POLLIN;
939     pfds[1].fd = sock;
940     pfds[1].events = POLLIN | POLLOUT;
941     pfds[2].fd = STDOUT_FILENO;
942     pfds[2].events = POLLOUT;
943     nfds = 3;
944     ret = poll(pfds, (nfds_t)nfds, 100); // 0.1 second
945     #endif
946 sysadm 1.33
947 sysadm 1.82 if (ret < 0)
948 sysadm 1.14 {
949 sysadm 1.38 if (errno != EINTR)
950 sysadm 1.14 {
951 sysadm 1.82 #ifdef HAVE_SYS_EPOLL_H
952 sysadm 1.104 log_error("epoll_wait() error (%d)", errno);
953 sysadm 1.82 #else
954 sysadm 1.104 log_error("poll() error (%d)", errno);
955 sysadm 1.82 #endif
956 sysadm 1.38 break;
957 sysadm 1.14 }
958 sysadm 1.38 continue;
959 sysadm 1.14 }
960 sysadm 1.82 else if (ret == 0) // timeout
961 sysadm 1.1 {
962 sysadm 1.78 if (time(NULL) - BBS_last_access_tm >= BBS_max_user_idle_time)
963 sysadm 1.28 {
964 sysadm 1.104 log_debug("User input timeout");
965 sysadm 1.38 break;
966 sysadm 1.28 }
967 sysadm 1.1 }
968 sysadm 1.38
969     for (int i = 0; i < nfds; i++)
970 sysadm 1.1 {
971 sysadm 1.82 #ifdef HAVE_SYS_EPOLL_H
972 sysadm 1.96 if (events[i].events & (EPOLLHUP | EPOLLERR))
973 sysadm 1.94 #else
974 sysadm 1.96 if (pfds[i].revents & (POLLHUP | POLLERR))
975 sysadm 1.94 #endif
976     {
977     #ifdef HAVE_SYS_EPOLL_H
978 sysadm 1.104 log_debug("FD (%d) error events (%d)", events[i].data.fd, events[i].events);
979 sysadm 1.94 #else
980 sysadm 1.104 log_debug("FD (%d) error events (%d)", pfds[i].fd, pfds[i].revents);
981 sysadm 1.94 #endif
982     loop = 0;
983     break;
984     }
985    
986     #ifdef HAVE_SYS_EPOLL_H
987     if (events[i].data.fd == STDIN_FILENO && (events[i].events & EPOLLIN))
988 sysadm 1.82 #else
989     if (pfds[i].fd == STDIN_FILENO && (pfds[i].revents & POLLIN))
990     #endif
991 sysadm 1.14 {
992 sysadm 1.38 stdin_read_wait = 1;
993 sysadm 1.59 }
994    
995 sysadm 1.82 #ifdef HAVE_SYS_EPOLL_H
996 sysadm 1.59 if (events[i].data.fd == sock)
997 sysadm 1.82 #else
998     if (pfds[i].fd == sock)
999     #endif
1000 sysadm 1.59 {
1001 sysadm 1.82 #ifdef HAVE_SYS_EPOLL_H
1002 sysadm 1.59 if (events[i].events & EPOLLIN)
1003 sysadm 1.82 #else
1004     if (pfds[i].revents & POLLIN)
1005     #endif
1006 sysadm 1.59 {
1007     sock_read_wait = 1;
1008     }
1009 sysadm 1.82
1010     #ifdef HAVE_SYS_EPOLL_H
1011 sysadm 1.59 if (events[i].events & EPOLLOUT)
1012 sysadm 1.82 #else
1013     if (pfds[i].revents & POLLOUT)
1014     #endif
1015 sysadm 1.59 {
1016     sock_write_wait = 1;
1017     }
1018     }
1019    
1020 sysadm 1.82 #ifdef HAVE_SYS_EPOLL_H
1021 sysadm 1.94 if (events[i].data.fd == STDOUT_FILENO && (events[i].events & EPOLLOUT))
1022 sysadm 1.82 #else
1023     if (pfds[i].fd == STDOUT_FILENO && (pfds[i].revents & POLLOUT))
1024 sysadm 1.84 #endif
1025 sysadm 1.59 {
1026     stdout_write_wait = 1;
1027     }
1028     }
1029    
1030     if (stdin_read_wait)
1031     {
1032     while (input_buf_len < sizeof(input_buf) && !SYS_server_exit)
1033     {
1034     if (SSH_v2)
1035 sysadm 1.33 {
1036 sysadm 1.59 ret = ssh_channel_read_nonblocking(SSH_channel, input_buf + input_buf_len, sizeof(input_buf) - (uint32_t)input_buf_len, 0);
1037     if (ret == SSH_ERROR)
1038 sysadm 1.47 {
1039 sysadm 1.104 log_debug("ssh_channel_read_nonblocking() error: %s", ssh_get_error(SSH_session));
1040 sysadm 1.59 loop = 0;
1041     break;
1042 sysadm 1.47 }
1043 sysadm 1.59 else if (ret == SSH_EOF)
1044 sysadm 1.47 {
1045 sysadm 1.59 stdin_read_wait = 0;
1046     loop = 0;
1047     break;
1048 sysadm 1.47 }
1049 sysadm 1.59 else if (ret == 0)
1050 sysadm 1.33 {
1051 sysadm 1.72 // Send NO-OP to remote server
1052     input_buf[input_buf_len] = '\0';
1053     input_buf_len++;
1054 sysadm 1.97
1055 sysadm 1.73 BBS_last_access_tm = time(NULL);
1056 sysadm 1.59 stdin_read_wait = 0;
1057     break; // Check whether channel is still open
1058 sysadm 1.38 }
1059 sysadm 1.59 }
1060     else
1061     {
1062     ret = (int)read(STDIN_FILENO, input_buf + input_buf_len, sizeof(input_buf) - (size_t)input_buf_len);
1063     }
1064     if (ret < 0)
1065     {
1066     if (errno == EAGAIN || errno == EWOULDBLOCK)
1067 sysadm 1.38 {
1068     stdin_read_wait = 0;
1069     break;
1070     }
1071 sysadm 1.59 else if (errno == EINTR)
1072     {
1073     continue;
1074     }
1075 sysadm 1.38 else
1076     {
1077 sysadm 1.104 log_error("read(STDIN) error (%d)", errno);
1078 sysadm 1.59 loop = 0;
1079     break;
1080     }
1081     }
1082     else if (ret == 0) // broken pipe
1083     {
1084 sysadm 1.104 log_debug("read(STDIN) EOF");
1085 sysadm 1.59 stdin_read_wait = 0;
1086     loop = 0;
1087     break;
1088     }
1089     else
1090     {
1091     input_buf_len += ret;
1092     BBS_last_access_tm = time(NULL);
1093 sysadm 1.58
1094 sysadm 1.59 // Refresh current action while user input
1095     if (user_online_update("BBS_NET") < 0)
1096     {
1097 sysadm 1.104 log_error("user_online_update(BBS_NET) error");
1098 sysadm 1.59 }
1099 sysadm 1.58
1100 sysadm 1.59 continue;
1101 sysadm 1.33 }
1102 sysadm 1.36 }
1103 sysadm 1.59 }
1104 sysadm 1.29
1105 sysadm 1.59 if (sock_write_wait)
1106     {
1107 sysadm 1.60 if (input_buf_offset < input_buf_len)
1108 sysadm 1.36 {
1109 sysadm 1.72 // For debug
1110     #ifdef _DEBUG
1111     for (int j = input_buf_offset; j < input_buf_len; j++)
1112     {
1113 sysadm 1.106 log_debug("input: <--[%u]", (unsigned char)(input_buf[j]));
1114 sysadm 1.72 }
1115     #endif
1116    
1117 sysadm 1.66 ret = io_buf_conv(input_cd, input_buf, &input_buf_len, &input_buf_offset, input_conv, sizeof(input_conv), &input_conv_len);
1118 sysadm 1.60 if (ret < 0)
1119     {
1120 sysadm 1.104 log_error("io_buf_conv(input, %d, %d, %d) error", input_buf_len, input_buf_offset, input_conv_len);
1121 sysadm 1.71 input_buf_len = input_buf_offset; // Discard invalid sequence
1122 sysadm 1.60 }
1123 sysadm 1.72
1124     // For debug
1125     #ifdef _DEBUG
1126     for (int j = input_conv_offset; j < input_conv_len; j++)
1127     {
1128 sysadm 1.106 log_debug("input_conv: <--[%u]", (unsigned char)(input_conv[j]));
1129 sysadm 1.72 }
1130     #endif
1131 sysadm 1.60 }
1132    
1133     while (input_conv_offset < input_conv_len && !SYS_server_exit)
1134     {
1135 sysadm 1.84 if (bbsnet_conf[n].use_ssh)
1136     {
1137 sysadm 1.97 ret = ssh_channel_write(outbound_channel, input_conv + input_conv_offset, (uint32_t)(input_conv_len - input_conv_offset));
1138 sysadm 1.84 if (ret == SSH_ERROR)
1139     {
1140 sysadm 1.104 log_debug("ssh_channel_write() error: %s", ssh_get_error(outbound_session));
1141 sysadm 1.84 loop = 0;
1142     break;
1143     }
1144     }
1145     else
1146     {
1147     ret = (int)write(sock, input_conv + input_conv_offset, (size_t)(input_conv_len - input_conv_offset));
1148     }
1149 sysadm 1.59 if (ret < 0)
1150 sysadm 1.36 {
1151 sysadm 1.59 if (errno == EAGAIN || errno == EWOULDBLOCK)
1152 sysadm 1.36 {
1153 sysadm 1.59 sock_write_wait = 0;
1154     break;
1155 sysadm 1.38 }
1156 sysadm 1.59 else if (errno == EINTR)
1157 sysadm 1.38 {
1158 sysadm 1.59 continue;
1159     }
1160     else
1161     {
1162 sysadm 1.104 log_debug("write(socket) error (%d)", errno);
1163 sysadm 1.36 loop = 0;
1164 sysadm 1.38 break;
1165     }
1166 sysadm 1.59 }
1167     else if (ret == 0) // broken pipe
1168     {
1169 sysadm 1.104 log_debug("write(socket) EOF");
1170 sysadm 1.59 sock_write_wait = 0;
1171     loop = 0;
1172     break;
1173     }
1174     else
1175     {
1176 sysadm 1.60 input_conv_offset += ret;
1177     if (input_conv_offset >= input_conv_len) // Output buffer complete
1178 sysadm 1.38 {
1179 sysadm 1.60 input_conv_offset = 0;
1180     input_conv_len = 0;
1181 sysadm 1.59 break;
1182 sysadm 1.36 }
1183 sysadm 1.59 continue;
1184 sysadm 1.36 }
1185 sysadm 1.14 }
1186 sysadm 1.59 }
1187 sysadm 1.36
1188 sysadm 1.59 if (sock_read_wait)
1189     {
1190     while (output_buf_len < sizeof(output_buf) && !SYS_server_exit)
1191 sysadm 1.14 {
1192 sysadm 1.84 if (bbsnet_conf[n].use_ssh)
1193     {
1194 sysadm 1.97 ret = ssh_channel_read_nonblocking(outbound_channel, output_buf + output_buf_len,
1195 sysadm 1.84 (uint32_t)(sizeof(output_buf) - (size_t)output_buf_len), 0);
1196     if (ret == SSH_ERROR)
1197     {
1198 sysadm 1.104 log_debug("ssh_channel_read_nonblocking() error: %s", ssh_get_error(outbound_session));
1199 sysadm 1.84 loop = 0;
1200     break;
1201     }
1202     else if (ret == SSH_EOF)
1203     {
1204     sock_read_wait = 0;
1205     loop = 0;
1206     break;
1207     }
1208     else if (ret == 0)
1209     {
1210     sock_read_wait = 0;
1211     break;
1212     }
1213     }
1214     else
1215     {
1216     ret = (int)read(sock, output_buf + output_buf_len, sizeof(output_buf) - (size_t)output_buf_len);
1217     }
1218 sysadm 1.59 if (ret < 0)
1219 sysadm 1.14 {
1220 sysadm 1.59 if (errno == EAGAIN || errno == EWOULDBLOCK)
1221 sysadm 1.38 {
1222 sysadm 1.59 sock_read_wait = 0;
1223     break;
1224 sysadm 1.38 }
1225 sysadm 1.59 else if (errno == EINTR)
1226 sysadm 1.33 {
1227 sysadm 1.59 continue;
1228 sysadm 1.38 }
1229     else
1230     {
1231 sysadm 1.104 log_debug("read(socket) error (%d)", errno);
1232 sysadm 1.59 loop = 0;
1233     break;
1234 sysadm 1.33 }
1235     }
1236 sysadm 1.59 else if (ret == 0) // broken pipe
1237     {
1238 sysadm 1.104 log_debug("read(socket) EOF");
1239 sysadm 1.59 sock_read_wait = 0;
1240     loop = 0;
1241     break;
1242     }
1243     else
1244     {
1245     output_buf_len += ret;
1246     continue;
1247     }
1248 sysadm 1.36 }
1249 sysadm 1.59 }
1250 sysadm 1.36
1251 sysadm 1.59 if (stdout_write_wait)
1252     {
1253 sysadm 1.60 if (output_buf_offset < output_buf_len)
1254     {
1255 sysadm 1.66 ret = io_buf_conv(output_cd, output_buf, &output_buf_len, &output_buf_offset, output_conv, sizeof(output_conv), &output_conv_len);
1256 sysadm 1.60 if (ret < 0)
1257     {
1258 sysadm 1.104 log_error("io_buf_conv(output, %d, %d, %d) error", output_buf_len, output_buf_offset, output_conv_len);
1259 sysadm 1.71 output_buf_len = output_buf_offset; // Discard invalid sequence
1260 sysadm 1.60 }
1261     }
1262    
1263     while (output_conv_offset < output_conv_len && !SYS_server_exit)
1264 sysadm 1.36 {
1265 sysadm 1.59 if (SSH_v2)
1266 sysadm 1.36 {
1267 sysadm 1.60 ret = ssh_channel_write(SSH_channel, output_conv + output_conv_offset, (uint32_t)(output_conv_len - output_conv_offset));
1268 sysadm 1.59 if (ret == SSH_ERROR)
1269 sysadm 1.47 {
1270 sysadm 1.104 log_debug("ssh_channel_write() error: %s", ssh_get_error(SSH_session));
1271 sysadm 1.59 loop = 0;
1272     break;
1273 sysadm 1.47 }
1274 sysadm 1.59 }
1275     else
1276     {
1277 sysadm 1.60 ret = (int)write(STDOUT_FILENO, output_conv + output_conv_offset, (size_t)(output_conv_len - output_conv_offset));
1278 sysadm 1.59 }
1279     if (ret < 0)
1280     {
1281     if (errno == EAGAIN || errno == EWOULDBLOCK)
1282 sysadm 1.47 {
1283 sysadm 1.59 stdout_write_wait = 0;
1284     break;
1285 sysadm 1.47 }
1286 sysadm 1.59 else if (errno == EINTR)
1287 sysadm 1.38 {
1288 sysadm 1.59 continue;
1289 sysadm 1.38 }
1290 sysadm 1.59 else
1291 sysadm 1.33 {
1292 sysadm 1.104 log_debug("write(STDOUT) error (%d)", errno);
1293 sysadm 1.36 loop = 0;
1294 sysadm 1.38 break;
1295     }
1296 sysadm 1.59 }
1297     else if (ret == 0) // broken pipe
1298     {
1299 sysadm 1.104 log_debug("write(STDOUT) EOF");
1300 sysadm 1.59 stdout_write_wait = 0;
1301     loop = 0;
1302     break;
1303     }
1304     else
1305     {
1306 sysadm 1.60 output_conv_offset += ret;
1307     if (output_conv_offset >= output_conv_len) // Output buffer complete
1308 sysadm 1.38 {
1309 sysadm 1.60 output_conv_offset = 0;
1310     output_conv_len = 0;
1311 sysadm 1.59 break;
1312 sysadm 1.36 }
1313 sysadm 1.59 continue;
1314 sysadm 1.36 }
1315 sysadm 1.14 }
1316 sysadm 1.1 }
1317     }
1318    
1319 sysadm 1.97 ret = 1; // Normal disconnect
1320     BBS_last_access_tm = time(NULL);
1321     t_used = BBS_last_access_tm - t_begin;
1322 sysadm 1.104 log_common("BBSNET disconnect, %ld days %ld hours %ld minutes %ld seconds used",
1323 sysadm 1.97 t_used / 86400, t_used % 86400 / 3600, t_used % 3600 / 60, t_used % 60);
1324    
1325 sysadm 1.89 cleanup:
1326 sysadm 1.97 // Clear sensitive data
1327     memset(remote_pass, 0, sizeof(remote_pass));
1328     memset(remote_user, 0, sizeof(remote_user));
1329    
1330 sysadm 1.107 if (input_cd != (iconv_t)(-1) && iconv_close(input_cd) < 0)
1331 sysadm 1.89 {
1332 sysadm 1.107 log_error("iconv_close(input) error (%d)", errno);
1333 sysadm 1.89 }
1334 sysadm 1.107 if (output_cd != (iconv_t)(-1) && iconv_close(output_cd) < 0)
1335 sysadm 1.89 {
1336 sysadm 1.107 log_error("iconv_close(output) error (%d)", errno);
1337 sysadm 1.89 }
1338 sysadm 1.60
1339 sysadm 1.82 #ifdef HAVE_SYS_EPOLL_H
1340 sysadm 1.89 if (epollfd != -1 && close(epollfd) < 0)
1341 sysadm 1.39 {
1342 sysadm 1.104 log_error("close(epoll) error (%d)");
1343 sysadm 1.39 }
1344 sysadm 1.82 #endif
1345 sysadm 1.39
1346 sysadm 1.84 if (bbsnet_conf[n].use_ssh)
1347     {
1348 sysadm 1.97 if (outbound_channel != NULL)
1349 sysadm 1.89 {
1350 sysadm 1.97 ssh_channel_send_eof(outbound_channel);
1351     ssh_channel_close(outbound_channel);
1352     ssh_channel_free(outbound_channel);
1353 sysadm 1.89 }
1354 sysadm 1.97 if (outbound_session != NULL)
1355 sysadm 1.89 {
1356 sysadm 1.97 ssh_disconnect(outbound_session);
1357     ssh_free(outbound_session);
1358 sysadm 1.89 }
1359 sysadm 1.84 }
1360    
1361 sysadm 1.36 // Restore STDIN/STDOUT flags
1362 sysadm 1.90 if (flags_stdin != -1 && fcntl(STDIN_FILENO, F_SETFL, flags_stdin) == -1)
1363 sysadm 1.89 {
1364 sysadm 1.104 log_error("fcntl(F_SETFL) error (%d)", errno);
1365 sysadm 1.89 }
1366     if (flags_stdout != -1 && fcntl(STDOUT_FILENO, F_SETFL, flags_stdout) == -1)
1367     {
1368 sysadm 1.104 log_error("fcntl(F_SETFL) error (%d)", errno);
1369 sysadm 1.89 }
1370 sysadm 1.36
1371 sysadm 1.107 if (sock != -1)
1372 sysadm 1.14 {
1373 sysadm 1.107 close(sock);
1374 sysadm 1.14 }
1375 sysadm 1.1
1376 sysadm 1.93 if (res)
1377     {
1378     freeaddrinfo(res);
1379     }
1380    
1381 sysadm 1.97 return ret;
1382 sysadm 1.1 }
1383    
1384 sysadm 1.74 static int bbsnet_refresh()
1385 sysadm 1.1 {
1386 sysadm 1.14 clearscr();
1387 sysadm 1.84
1388     moveto(1, 1);
1389     prints(" ------------------------------------------------------------------------------ ");
1390 sysadm 1.20 for (int i = 2; i < 19; i++)
1391 sysadm 1.14 {
1392 sysadm 1.84 moveto(i, 1);
1393 sysadm 1.23 prints("|");
1394 sysadm 1.84 moveto(i, 80);
1395 sysadm 1.23 prints("|");
1396 sysadm 1.14 }
1397 sysadm 1.84 moveto(19, 1);
1398     prints("|------------------------------------------------------------------------------|");
1399     moveto(22, 1);
1400     prints(" ------------------------------------------------------------------------------ ");
1401     moveto(23, 1);
1402     prints(" [\033[1;32mCtrl+C\033[m]退出");
1403 sysadm 1.13
1404 sysadm 1.14 iflush();
1405 sysadm 1.1
1406 sysadm 1.14 return 0;
1407 sysadm 1.1 }
1408    
1409 sysadm 1.74 static int bbsnet_selchange()
1410 sysadm 1.1 {
1411 sysadm 1.43 int i = bbsnet_menu.menu_item_pos[0];
1412    
1413 sysadm 1.84 moveto(20, 1);
1414 sysadm 1.14 clrtoeol();
1415 sysadm 1.87 prints("|\033[1m单位: \033[1;33m%s\033[m%*s 站名: \033[1;33m%s\033[m%*s 类型: \033[1;33m%s\033[m",
1416     bbsnet_conf[i].org_name, 20 - str_length(bbsnet_conf[i].org_name, 1), "",
1417     bbsnet_conf[i].site_name, 20 - str_length(bbsnet_conf[i].site_name, 1), "",
1418     (bbsnet_conf[i].use_ssh ? "SSH" : "Telnet"));
1419 sysadm 1.84 moveto(20, 80);
1420 sysadm 1.23 prints("|");
1421 sysadm 1.84 moveto(21, 1);
1422 sysadm 1.14 clrtoeol();
1423 sysadm 1.93 prints("|\033[1m连往: \033[1;33m%-20s\033[m 端口: \033[1;33m%-5s\033[m 编码: \033[1;33m%s\033[m",
1424 sysadm 1.87 bbsnet_conf[i].host_name, bbsnet_conf[i].port, bbsnet_conf[i].charset);
1425 sysadm 1.84 moveto(21, 80);
1426 sysadm 1.23 prints("|");
1427 sysadm 1.14 iflush();
1428 sysadm 1.1
1429 sysadm 1.14 return 0;
1430 sysadm 1.1 }
1431    
1432 sysadm 1.83 int bbs_net()
1433 sysadm 1.1 {
1434 sysadm 1.98 int ch;
1435 sysadm 1.1
1436 sysadm 1.89 if (load_bbsnet_conf(CONF_BBSNET) < 0)
1437     {
1438     clearscr();
1439     moveto(1, 1);
1440     prints("加载穿梭配置失败！");
1441     press_any_key();
1442     return -1;
1443     }
1444 sysadm 1.1
1445 sysadm 1.14 bbsnet_refresh();
1446 sysadm 1.41 display_menu(&bbsnet_menu);
1447 sysadm 1.43 bbsnet_selchange();
1448 sysadm 1.14
1449 sysadm 1.26 while (!SYS_server_exit)
1450 sysadm 1.1 {
1451 sysadm 1.39 ch = igetch(100);
1452 sysadm 1.52
1453 sysadm 1.71 if (ch != KEY_NULL && ch != KEY_TIMEOUT)
1454     {
1455     BBS_last_access_tm = time(NULL);
1456     }
1457 sysadm 1.64
1458 sysadm 1.14 switch (ch)
1459     {
1460 sysadm 1.47 case KEY_NULL: // broken pipe
1461 sysadm 1.104 log_debug("KEY_NULL");
1462 sysadm 1.40 goto cleanup;
1463 sysadm 1.14 case KEY_TIMEOUT:
1464 sysadm 1.78 if (time(NULL) - BBS_last_access_tm >= BBS_max_user_idle_time)
1465 sysadm 1.14 {
1466 sysadm 1.104 log_debug("User input timeout");
1467 sysadm 1.40 goto cleanup;
1468 sysadm 1.14 }
1469 sysadm 1.29 continue;
1470 sysadm 1.64 case KEY_ESC:
1471     case Ctrl('C'): // user cancel
1472     goto cleanup;
1473 sysadm 1.14 case CR:
1474 sysadm 1.98 if (bbsnet_connect(bbsnet_menu.menu_item_pos[0]) < 0)
1475     {
1476 sysadm 1.104 log_debug("bbsnet_connect() error");
1477 sysadm 1.98 }
1478 sysadm 1.84 // Force cleanup anything remaining in the output buffer
1479     clearscr();
1480     iflush();
1481     // Clear screen and redraw menu
1482 sysadm 1.14 bbsnet_refresh();
1483 sysadm 1.41 display_menu(&bbsnet_menu);
1484 sysadm 1.43 bbsnet_selchange();
1485 sysadm 1.14 break;
1486     case KEY_UP:
1487 sysadm 1.98 for (int i = 0; i < STATION_PER_LINE; i++)
1488 sysadm 1.20 {
1489 sysadm 1.14 menu_control(&bbsnet_menu, KEY_UP);
1490 sysadm 1.20 }
1491 sysadm 1.43 bbsnet_selchange();
1492 sysadm 1.14 break;
1493     case KEY_DOWN:
1494 sysadm 1.98 for (int i = 0; i < STATION_PER_LINE; i++)
1495 sysadm 1.20 {
1496 sysadm 1.14 menu_control(&bbsnet_menu, KEY_DOWN);
1497 sysadm 1.20 }
1498 sysadm 1.43 bbsnet_selchange();
1499 sysadm 1.14 break;
1500     case KEY_LEFT:
1501     menu_control(&bbsnet_menu, KEY_UP);
1502 sysadm 1.43 bbsnet_selchange();
1503 sysadm 1.14 break;
1504     case KEY_RIGHT:
1505     menu_control(&bbsnet_menu, KEY_DOWN);
1506 sysadm 1.43 bbsnet_selchange();
1507     break;
1508 sysadm 1.44 case KEY_HOME:
1509 sysadm 1.43 case KEY_PGUP:
1510     menu_control(&bbsnet_menu, KEY_PGUP);
1511     bbsnet_selchange();
1512 sysadm 1.14 break;
1513 sysadm 1.44 case KEY_END:
1514     case KEY_PGDN:
1515     menu_control(&bbsnet_menu, KEY_PGDN);
1516     bbsnet_selchange();
1517     break;
1518 sysadm 1.14 default:
1519     menu_control(&bbsnet_menu, ch);
1520 sysadm 1.43 bbsnet_selchange();
1521 sysadm 1.14 break;
1522     }
1523 sysadm 1.1 }
1524    
1525 sysadm 1.40 cleanup:
1526     unload_bbsnet_conf();
1527    
1528 sysadm 1.14 return 0;
1529 sysadm 1.1 }
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