/[LeafOK_CVS]/lbbs/src/bbs_net.c
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Revision 1.60 - (hide annotations)
Sat Oct 4 15:55:26 2025 UTC (5 months, 1 week ago) by sysadm
Branch: MAIN
Changes since 1.59: +123 -15 lines
Content type: text/x-csrc 
Add charset conversion for BBSNET
1 sysadm 1.1 /***************************************************************************
2 sysadm 1.14 bbs_net.c - description
3     -------------------
4 sysadm 1.25 Copyright : (C) 2004-2025 by Leaflet
5     Email : leaflet@leafok.com
6 sysadm 1.1 ***************************************************************************/
7    
8     /***************************************************************************
9     * *
10     * This program is free software; you can redistribute it and/or modify *
11     * it under the terms of the GNU General Public License as published by *
12 sysadm 1.25 * the Free Software Foundation; either version 3 of the License, or *
13 sysadm 1.1 * (at your option) any later version. *
14     * *
15     ***************************************************************************/
16    
17     #include "bbs.h"
18     #include "common.h"
19 sysadm 1.55 #include "io.h"
20 sysadm 1.15 #include "log.h"
21 sysadm 1.55 #include "login.h"
22     #include "menu.h"
23 sysadm 1.15 #include "screen.h"
24 sysadm 1.55 #include <errno.h>
25     #include <fcntl.h>
26     #include <netdb.h>
27     #include <stdarg.h>
28 sysadm 1.1 #include <stdio.h>
29 sysadm 1.55 #include <stdlib.h>
30 sysadm 1.29 #include <string.h>
31     #include <time.h>
32     #include <unistd.h>
33 sysadm 1.55 #include <arpa/inet.h>
34 sysadm 1.60 #include <iconv.h>
35 sysadm 1.55 #include <libssh/libssh.h>
36     #include <libssh/server.h>
37     #include <libssh/callbacks.h>
38     #include <netinet/in.h>
39     #include <netinet/ip.h>
40 sysadm 1.29 #include <sys/select.h>
41 sysadm 1.1 #include <sys/ioctl.h>
42     #include <sys/socket.h>
43 sysadm 1.38 #include <sys/epoll.h>
44 sysadm 1.1
45 sysadm 1.26 #define MENU_CONF_DELIM " \t\r\n"
46    
47 sysadm 1.14 #define MAX_PROCESS_BAR_LEN 30
48     #define MAXSTATION 26 * 2
49     #define STATION_PER_LINE 4
50 sysadm 1.1
51     struct _bbsnet_conf
52     {
53 sysadm 1.14 char host1[20];
54     char host2[40];
55     char ip[40];
56 sysadm 1.24 in_port_t port;
57 sysadm 1.60 char charset[20];
58 sysadm 1.1 } bbsnet_conf[MAXSTATION];
59    
60     MENU_SET bbsnet_menu;
61    
62 sysadm 1.14 int load_bbsnet_conf(const char *file_config)
63 sysadm 1.1 {
64 sysadm 1.14 FILE *fp;
65     MENU *p_menu;
66 sysadm 1.41 MENU_ITEM *p_menu_item;
67     MENU_ITEM_ID menu_item_id;
68 sysadm 1.60 char t[256], *t1, *t2, *t3, *t4, *t5, *saveptr;
69 sysadm 1.14
70     fp = fopen(file_config, "r");
71     if (fp == NULL)
72 sysadm 1.20 {
73 sysadm 1.14 return -1;
74 sysadm 1.20 }
75 sysadm 1.14
76 sysadm 1.41 bbsnet_menu.p_menu_pool = calloc(1, sizeof(MENU));
77     if (bbsnet_menu.p_menu_pool == NULL)
78     {
79     log_error("calloc(p_menu_pool) error\n");
80     return -3;
81     }
82     bbsnet_menu.menu_count = 1;
83    
84     bbsnet_menu.p_menu_item_pool = calloc(MAXSTATION, sizeof(MENU_ITEM));
85     if (bbsnet_menu.p_menu_item_pool == NULL)
86     {
87     log_error("calloc(p_menu_item_pool) error\n");
88     return -3;
89     }
90     bbsnet_menu.menu_item_count = MAXSTATION;
91    
92     p_menu = (MENU *)get_menu_by_id(&bbsnet_menu, 0);
93 sysadm 1.40
94 sysadm 1.21 strncpy(p_menu->name, "BBSNET", sizeof(p_menu->name) - 1);
95     p_menu->name[sizeof(p_menu->name) - 1] = '\0';
96 sysadm 1.14 p_menu->title.show = 0;
97 sysadm 1.41 p_menu->screen_show = 0;
98 sysadm 1.1
99 sysadm 1.41 menu_item_id = 0;
100     while (fgets(t, 255, fp) && menu_item_id < MAXSTATION)
101 sysadm 1.14 {
102 sysadm 1.26 t1 = strtok_r(t, MENU_CONF_DELIM, &saveptr);
103     t2 = strtok_r(NULL, MENU_CONF_DELIM, &saveptr);
104     t3 = strtok_r(NULL, MENU_CONF_DELIM, &saveptr);
105     t4 = strtok_r(NULL, MENU_CONF_DELIM, &saveptr);
106 sysadm 1.60 t5 = strtok_r(NULL, MENU_CONF_DELIM, &saveptr);
107 sysadm 1.14
108 sysadm 1.60 if (t1 == NULL || t2 == NULL || t3 == NULL || t4 == NULL || t5 == NULL || t[0] == '#' || t[0] == '*')
109 sysadm 1.18 {
110 sysadm 1.14 continue;
111 sysadm 1.18 }
112    
113 sysadm 1.41 strncpy(bbsnet_conf[menu_item_id].host1, t2, sizeof(bbsnet_conf[menu_item_id].host1) - 1);
114     bbsnet_conf[menu_item_id].host1[sizeof(bbsnet_conf[menu_item_id].host1) - 1] = '\0';
115     strncpy(bbsnet_conf[menu_item_id].host2, t1, sizeof(bbsnet_conf[menu_item_id].host2) - 1);
116     bbsnet_conf[menu_item_id].host2[sizeof(bbsnet_conf[menu_item_id].host2) - 1] = '\0';
117     strncpy(bbsnet_conf[menu_item_id].ip, t3, sizeof(bbsnet_conf[menu_item_id].ip) - 1);
118     bbsnet_conf[menu_item_id].ip[sizeof(bbsnet_conf[menu_item_id].ip) - 1] = '\0';
119     bbsnet_conf[menu_item_id].port = (in_port_t)(t4 ? atoi(t4) : 23);
120 sysadm 1.60 strncpy(bbsnet_conf[menu_item_id].charset, t5, sizeof(bbsnet_conf[menu_item_id].charset) - 1);
121     bbsnet_conf[menu_item_id].charset[sizeof(bbsnet_conf[menu_item_id].charset) - 1] = '\0';
122 sysadm 1.14
123 sysadm 1.41 p_menu_item = get_menu_item_by_id(&bbsnet_menu, menu_item_id);
124     if (p_menu_item == NULL)
125     {
126     log_error("get_menu_item_by_id(%d) return NULL pointer\n", menu_item_id);
127     return -1;
128     }
129 sysadm 1.14
130 sysadm 1.41 p_menu_item->row = (int16_t)(2 + menu_item_id / STATION_PER_LINE);
131     p_menu_item->col = (int16_t)(5 + menu_item_id % STATION_PER_LINE * 20);
132     snprintf(p_menu_item->action, sizeof(p_menu_item->action), "%d", (int16_t)menu_item_id);
133     p_menu_item->submenu = 0;
134     p_menu_item->priv = 0;
135     p_menu_item->level = 0;
136     p_menu_item->name[0] =
137     (char)(menu_item_id < MAXSTATION / 2 ? 'A' + menu_item_id : 'a' + menu_item_id);
138     p_menu_item->name[1] = '\0';
139     snprintf(p_menu_item->text, sizeof(p_menu_item->text), "%c. %s",
140     p_menu_item->name[0], bbsnet_conf[menu_item_id].host1);
141    
142     p_menu->items[p_menu->item_count] = menu_item_id;
143     p_menu->item_count++;
144     menu_item_id++;
145     }
146    
147     bbsnet_menu.menu_item_count = (int16_t)menu_item_id;
148     bbsnet_menu.menu_id_path[0] = 0;
149     bbsnet_menu.menu_item_pos[0] = 0;
150     bbsnet_menu.choose_step = 0;
151 sysadm 1.14
152 sysadm 1.41 fclose(fp);
153 sysadm 1.14
154     return 0;
155 sysadm 1.1 }
156    
157 sysadm 1.40 void unload_bbsnet_conf(void)
158     {
159 sysadm 1.41 bbsnet_menu.menu_count = 0;
160     bbsnet_menu.menu_item_count = 0;
161    
162     free(bbsnet_menu.p_menu_pool);
163     bbsnet_menu.p_menu_pool = NULL;
164     free(bbsnet_menu.p_menu_item_pool);
165     bbsnet_menu.p_menu_item_pool = NULL;
166 sysadm 1.40 }
167    
168     void process_bar(int n, int len)
169 sysadm 1.1 {
170 sysadm 1.27 char buf[LINE_BUFFER_LEN];
171     char buf2[LINE_BUFFER_LEN];
172    
173     if (len > LINE_BUFFER_LEN)
174     {
175     len = LINE_BUFFER_LEN - 1;
176     }
177     if (n < 0)
178     {
179     n = 0;
180     }
181     else if (n > len)
182     {
183     n = len;
184     }
185 sysadm 1.14
186     moveto(4, 0);
187 sysadm 1.23 prints(" ------------------------------ \r\n");
188 sysadm 1.27 snprintf(buf, sizeof(buf), " %3d%% ", n * 100 / len);
189 sysadm 1.30 strncpy(buf2, buf, (size_t)n);
190 sysadm 1.27 buf2[n] = '\0';
191     prints("|\033[46m%s\033[44m%s\033[m|\r\n", buf2, buf + n);
192 sysadm 1.23 prints(" ------------------------------ \r\n");
193 sysadm 1.14 iflush();
194 sysadm 1.1 }
195    
196 sysadm 1.60 int bbsnet_io_buf_conv(iconv_t cd, char *p_buf, int *p_buf_len, int *p_buf_offset, char *p_conv, size_t conv_size, int *p_conv_len)
197     {
198     char *in_buf;
199     char *out_buf;
200     size_t in_bytes;
201     size_t out_bytes;
202     int ret;
203    
204     in_buf = p_buf + *p_buf_offset;
205     in_bytes = (size_t)(*p_buf_len - *p_buf_offset);
206     out_buf = p_conv + *p_conv_len;
207     out_bytes = conv_size - (size_t)(*p_conv_len);
208    
209     while (in_bytes > 0)
210     {
211     ret = (int)iconv(cd, &in_buf, &in_bytes, &out_buf, &out_bytes);
212     if (ret == -1)
213     {
214     if (errno == EINVAL) // Incomplete
215     {
216     *p_buf_len = (int)(p_buf + *p_buf_len - in_buf);
217     *p_buf_offset = 0;
218     *p_conv_len = (int)(conv_size - out_bytes);
219     memmove(p_buf, in_buf, (size_t)(*p_buf_len));
220    
221     break;
222     }
223     else if (errno == E2BIG)
224     {
225     log_error("iconv(inbytes=%d, outbytes=%d) error: E2BIG\n", in_bytes, out_bytes);
226     return -1;
227     }
228     else if (errno == EILSEQ)
229     {
230     if (in_bytes > out_bytes || out_bytes <= 0)
231     {
232     errno = E2BIG;
233     return -1;
234     }
235    
236     *out_buf++ = *in_buf++;
237     in_bytes--;
238     out_bytes--;
239    
240     continue;
241     }
242     }
243     else
244     {
245     *p_buf_len = 0;
246     *p_buf_offset = 0;
247     *p_conv_len = (int)(conv_size - out_bytes);
248    
249     break;
250     }
251     }
252    
253     return 0;
254     }
255    
256 sysadm 1.14 int bbsnet_connect(int n)
257 sysadm 1.1 {
258 sysadm 1.36 int sock, ret, loop, error;
259 sysadm 1.38 int sock_connected = 0;
260 sysadm 1.36 int flags_sock;
261     int flags_stdin;
262     int flags_stdout;
263     int len;
264 sysadm 1.14 struct sockaddr_in sin;
265 sysadm 1.36 char input_buf[LINE_BUFFER_LEN];
266     char output_buf[LINE_BUFFER_LEN];
267     int input_buf_len = 0;
268     int output_buf_len = 0;
269     int input_buf_offset = 0;
270     int output_buf_offset = 0;
271 sysadm 1.60 iconv_t input_cd = NULL;
272     char input_conv[LINE_BUFFER_LEN * 2];
273     char output_conv[LINE_BUFFER_LEN * 2];
274     int input_conv_len = 0;
275     int output_conv_len = 0;
276     int input_conv_offset = 0;
277     int output_conv_offset = 0;
278     iconv_t output_cd = NULL;
279 sysadm 1.38 struct epoll_event ev, events[MAX_EVENTS];
280     int nfds, epollfd;
281     int stdin_read_wait = 0;
282     int stdout_write_wait = 0;
283     int sock_read_wait = 0;
284     int sock_write_wait = 0;
285 sysadm 1.26 struct hostent *p_host = NULL;
286 sysadm 1.31 int tos;
287 sysadm 1.26 char remote_addr[IP_ADDR_LEN];
288 sysadm 1.14 int remote_port;
289 sysadm 1.56 time_t t_used = time(NULL);
290 sysadm 1.14 struct tm *tm_used;
291 sysadm 1.26 int ch;
292 sysadm 1.14
293 sysadm 1.53 if (user_online_update("BBS_NET") < 0)
294     {
295     log_error("user_online_update(BBS_NET) error\n");
296     }
297    
298 sysadm 1.14 clearscr();
299    
300     moveto(0, 0);
301 sysadm 1.57 prints("\033[1;32m正在测试往 %s (%s) 的连接，请稍候... \033[m\r\n",
302 sysadm 1.14 bbsnet_conf[n].host1, bbsnet_conf[n].ip);
303     iflush();
304    
305 sysadm 1.26 p_host = gethostbyname(bbsnet_conf[n].ip);
306 sysadm 1.14
307 sysadm 1.26 if (p_host == NULL)
308 sysadm 1.1 {
309 sysadm 1.57 prints("\033[1;31m查找主机名失败！\033[m\r\n");
310 sysadm 1.14 press_any_key();
311     return -1;
312 sysadm 1.1 }
313 sysadm 1.14
314     sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
315    
316     if (sock < 0)
317 sysadm 1.1 {
318 sysadm 1.57 prints("\033[1;31m无法创建socket！\033[m\r\n");
319 sysadm 1.14 press_any_key();
320     return -1;
321 sysadm 1.1 }
322    
323 sysadm 1.14 sin.sin_family = AF_INET;
324 sysadm 1.48 sin.sin_addr.s_addr = (BBS_address[0] != '\0' ? inet_addr(BBS_address) : INADDR_ANY);
325 sysadm 1.14 sin.sin_port = 0;
326    
327     if (bind(sock, (struct sockaddr *)&sin, sizeof(sin)) < 0)
328     {
329 sysadm 1.31 log_error("Bind address %s:%u failed (%d)\n",
330     inet_ntoa(sin.sin_addr), ntohs(sin.sin_port), errno);
331 sysadm 1.14 return -2;
332     }
333 sysadm 1.1
334 sysadm 1.49 memset(&sin, 0, sizeof(sin));
335 sysadm 1.14 sin.sin_family = AF_INET;
336 sysadm 1.26 sin.sin_addr = *(struct in_addr *)p_host->h_addr_list[0];
337 sysadm 1.14 sin.sin_port = htons(bbsnet_conf[n].port);
338    
339 sysadm 1.21 strncpy(remote_addr, inet_ntoa(sin.sin_addr), sizeof(remote_addr) - 1);
340     remote_addr[sizeof(remote_addr) - 1] = '\0';
341 sysadm 1.14 remote_port = ntohs(sin.sin_port);
342    
343 sysadm 1.57 prints("\033[1;32m穿梭进度条提示您当前已使用的时间，按\033[1;33mCtrl+C\033[1;32m中断。\033[m\r\n");
344 sysadm 1.14 process_bar(0, MAX_PROCESS_BAR_LEN);
345 sysadm 1.29
346 sysadm 1.39 // Set socket as non-blocking
347     flags_sock = fcntl(sock, F_GETFL, 0);
348     fcntl(sock, F_SETFL, flags_sock | O_NONBLOCK);
349    
350     // Set STDIN/STDOUT as non-blocking
351     flags_stdin = fcntl(STDIN_FILENO, F_GETFL, 0);
352     flags_stdout = fcntl(STDOUT_FILENO, F_GETFL, 0);
353     fcntl(STDIN_FILENO, F_SETFL, flags_stdin | O_NONBLOCK);
354     fcntl(STDOUT_FILENO, F_SETFL, flags_stdout | O_NONBLOCK);
355    
356 sysadm 1.38 epollfd = epoll_create1(0);
357     if (epollfd < 0)
358     {
359     log_error("epoll_create1() error (%d)\n", errno);
360     return -1;
361     }
362    
363 sysadm 1.59 ev.events = EPOLLOUT | EPOLLET;
364 sysadm 1.38 ev.data.fd = sock;
365     if (epoll_ctl(epollfd, EPOLL_CTL_ADD, sock, &ev) == -1)
366     {
367     log_error("epoll_ctl(socket) error (%d)\n", errno);
368 sysadm 1.39 goto cleanup;
369 sysadm 1.38 }
370    
371 sysadm 1.59 ev.events = EPOLLIN | EPOLLET;
372 sysadm 1.38 ev.data.fd = STDIN_FILENO;
373     if (epoll_ctl(epollfd, EPOLL_CTL_ADD, STDIN_FILENO, &ev) == -1)
374     {
375     log_error("epoll_ctl(STDIN_FILENO) error (%d)\n", errno);
376 sysadm 1.39 goto cleanup;
377 sysadm 1.38 }
378    
379     while (!SYS_server_exit)
380 sysadm 1.29 {
381 sysadm 1.38 if ((ret = connect(sock, (struct sockaddr *)&sin, sizeof(sin))) < 0)
382 sysadm 1.29 {
383 sysadm 1.38 if (errno == EAGAIN || errno == EALREADY || errno == EINPROGRESS)
384     {
385     // Use select / epoll to check writability of the socket,
386     // then use getsockopt to check the status of the socket.
387     // See man connect(2)
388     break;
389     }
390     else if (errno == EINTR)
391     {
392     continue;
393     }
394     else
395     {
396     log_error("connect(socket) error (%d)\n", errno);
397 sysadm 1.39
398 sysadm 1.57 prints("\033[1;31m连接失败！\033[m\r\n");
399 sysadm 1.38 press_any_key();
400 sysadm 1.39
401     goto cleanup;
402 sysadm 1.38 }
403 sysadm 1.29 }
404     }
405    
406 sysadm 1.38 for (int j = 0; j < MAX_PROCESS_BAR_LEN && !sock_connected && !SYS_server_exit; j++)
407 sysadm 1.1 {
408 sysadm 1.38 nfds = epoll_wait(epollfd, events, MAX_EVENTS, 500); // 0.5 second
409 sysadm 1.29
410 sysadm 1.38 if (nfds < 0)
411 sysadm 1.20 {
412 sysadm 1.29 if (errno != EINTR)
413     {
414 sysadm 1.38 log_error("epoll_wait() error (%d)\n", errno);
415 sysadm 1.39 break;
416 sysadm 1.29 }
417 sysadm 1.20 }
418 sysadm 1.38 else if (nfds == 0) // timeout
419     {
420     process_bar(j + 1, MAX_PROCESS_BAR_LEN);
421     }
422     else // ret > 0
423 sysadm 1.14 {
424 sysadm 1.38 for (int i = 0; i < nfds; i++)
425 sysadm 1.29 {
426 sysadm 1.38 if (events[i].data.fd == sock)
427     {
428     len = sizeof(error);
429     if (getsockopt(sock, SOL_SOCKET, SO_ERROR, &error, (socklen_t *)&len) < 0)
430     {
431     log_error("getsockopt() error (%d) !\n", error);
432 sysadm 1.39 goto cleanup;
433 sysadm 1.38 }
434     if (error == 0)
435     {
436     sock_connected = 1;
437     }
438     }
439     else if (events[i].data.fd == STDIN_FILENO)
440     {
441     ch = igetch(0);
442 sysadm 1.45 if (ch == Ctrl('C') || ch == KEY_ESC)
443 sysadm 1.38 {
444 sysadm 1.39 goto cleanup;
445 sysadm 1.38 }
446     }
447 sysadm 1.29 }
448 sysadm 1.14 }
449 sysadm 1.12 }
450 sysadm 1.38 if (SYS_server_exit)
451     {
452 sysadm 1.39 goto cleanup;
453 sysadm 1.38 }
454     if (!sock_connected)
455 sysadm 1.12 {
456 sysadm 1.57 prints("\033[1;31m连接失败！\033[m\r\n");
457 sysadm 1.14 press_any_key();
458 sysadm 1.39
459     goto cleanup;
460 sysadm 1.12 }
461 sysadm 1.29
462 sysadm 1.31 tos = IPTOS_LOWDELAY;
463     if (setsockopt(sock, IPPROTO_IP, IP_TOS, &tos, sizeof(tos)) < 0)
464     {
465     log_error("setsockopt IP_TOS=%d error (%d)\n", tos, errno);
466     }
467 sysadm 1.14
468 sysadm 1.57 prints("\033[1;31m连接成功！\033[m\r\n");
469 sysadm 1.33 iflush();
470 sysadm 1.46 log_common("BBSNET connect to %s:%d\n", remote_addr, remote_port);
471 sysadm 1.14
472 sysadm 1.60 input_cd = iconv_open(bbsnet_conf[n].charset, "UTF-8");
473     if (input_cd == (iconv_t)(-1))
474     {
475     log_error("iconv_open(UTF8->GBK) error: %d\n", errno);
476     goto cleanup;
477     }
478     output_cd = iconv_open("UTF-8", bbsnet_conf[n].charset);
479     if (input_cd == (iconv_t)(-1))
480     {
481     log_error("iconv_open(GBK->UTF-8) error: %d\n", errno);
482     iconv_close(input_cd);
483     goto cleanup;
484     }
485    
486 sysadm 1.38 ev.events = EPOLLIN | EPOLLOUT | EPOLLET;
487     ev.data.fd = sock;
488     if (epoll_ctl(epollfd, EPOLL_CTL_MOD, sock, &ev) == -1)
489     {
490     log_error("epoll_ctl(socket) error (%d)\n", errno);
491 sysadm 1.39 goto cleanup;
492 sysadm 1.38 }
493    
494 sysadm 1.59 ev.events = EPOLLOUT | EPOLLET;
495 sysadm 1.38 ev.data.fd = STDOUT_FILENO;
496     if (epoll_ctl(epollfd, EPOLL_CTL_ADD, STDOUT_FILENO, &ev) == -1)
497     {
498     log_error("epoll_ctl(STDOUT_FILENO) error (%d)\n", errno);
499 sysadm 1.39 goto cleanup;
500 sysadm 1.38 }
501    
502 sysadm 1.50 BBS_last_access_tm = t_used = time(NULL);
503 sysadm 1.14 loop = 1;
504    
505 sysadm 1.26 while (loop && !SYS_server_exit)
506 sysadm 1.12 {
507 sysadm 1.47 if (SSH_v2 && ssh_channel_is_closed(SSH_channel))
508     {
509     log_error("SSH channel is closed\n");
510     loop = 0;
511     break;
512     }
513    
514 sysadm 1.38 nfds = epoll_wait(epollfd, events, MAX_EVENTS, 100); // 0.1 second
515 sysadm 1.33
516 sysadm 1.38 if (nfds < 0)
517 sysadm 1.14 {
518 sysadm 1.38 if (errno != EINTR)
519 sysadm 1.14 {
520 sysadm 1.38 log_error("epoll_wait() error (%d)\n", errno);
521     break;
522 sysadm 1.14 }
523 sysadm 1.38 continue;
524 sysadm 1.14 }
525 sysadm 1.38 else if (nfds == 0) // timeout
526 sysadm 1.1 {
527 sysadm 1.50 if (time(NULL) - BBS_last_access_tm >= MAX_DELAY_TIME)
528 sysadm 1.28 {
529 sysadm 1.38 break;
530 sysadm 1.28 }
531 sysadm 1.1 }
532 sysadm 1.38
533     for (int i = 0; i < nfds; i++)
534 sysadm 1.1 {
535 sysadm 1.59 if (events[i].data.fd == STDIN_FILENO)
536 sysadm 1.14 {
537 sysadm 1.38 stdin_read_wait = 1;
538 sysadm 1.59 }
539    
540     if (events[i].data.fd == sock)
541     {
542     if (events[i].events & EPOLLIN)
543     {
544     sock_read_wait = 1;
545     }
546     if (events[i].events & EPOLLOUT)
547     {
548     sock_write_wait = 1;
549     }
550     }
551    
552     if (events[i].data.fd == STDOUT_FILENO)
553     {
554     stdout_write_wait = 1;
555     }
556     }
557    
558     if (stdin_read_wait)
559     {
560     while (input_buf_len < sizeof(input_buf) && !SYS_server_exit)
561     {
562     if (SSH_v2)
563 sysadm 1.33 {
564 sysadm 1.59 ret = ssh_channel_read_nonblocking(SSH_channel, input_buf + input_buf_len, sizeof(input_buf) - (uint32_t)input_buf_len, 0);
565     if (ret == SSH_ERROR)
566 sysadm 1.47 {
567 sysadm 1.59 log_error("ssh_channel_read_nonblocking() error: %s\n", ssh_get_error(SSH_session));
568     loop = 0;
569     break;
570 sysadm 1.47 }
571 sysadm 1.59 else if (ret == SSH_EOF)
572 sysadm 1.47 {
573 sysadm 1.59 stdin_read_wait = 0;
574     loop = 0;
575     break;
576 sysadm 1.47 }
577 sysadm 1.59 else if (ret == 0)
578 sysadm 1.33 {
579 sysadm 1.59 stdin_read_wait = 0;
580     break; // Check whether channel is still open
581 sysadm 1.38 }
582 sysadm 1.59 }
583     else
584     {
585     ret = (int)read(STDIN_FILENO, input_buf + input_buf_len, sizeof(input_buf) - (size_t)input_buf_len);
586     }
587     if (ret < 0)
588     {
589     if (errno == EAGAIN || errno == EWOULDBLOCK)
590 sysadm 1.38 {
591     stdin_read_wait = 0;
592     break;
593     }
594 sysadm 1.59 else if (errno == EINTR)
595     {
596     continue;
597     }
598 sysadm 1.38 else
599     {
600 sysadm 1.59 log_error("read(STDIN) error (%d)\n", errno);
601     loop = 0;
602     break;
603     }
604     }
605     else if (ret == 0) // broken pipe
606     {
607     #ifdef _DEBUG
608     log_error("read(STDIN) EOF\n");
609     #endif
610     stdin_read_wait = 0;
611     loop = 0;
612     break;
613     }
614     else
615     {
616     input_buf_len += ret;
617     BBS_last_access_tm = time(NULL);
618 sysadm 1.58
619 sysadm 1.59 // Refresh current action while user input
620     if (user_online_update("BBS_NET") < 0)
621     {
622     log_error("user_online_update(BBS_NET) error\n");
623     }
624 sysadm 1.58
625 sysadm 1.59 continue;
626 sysadm 1.33 }
627 sysadm 1.36 }
628 sysadm 1.59 }
629 sysadm 1.29
630 sysadm 1.59 if (sock_write_wait)
631     {
632 sysadm 1.60 if (input_buf_offset < input_buf_len)
633 sysadm 1.36 {
634 sysadm 1.60 ret = bbsnet_io_buf_conv(input_cd, input_buf, &input_buf_len, &input_buf_offset, input_conv, sizeof(input_conv), &input_conv_len);
635     if (ret < 0)
636     {
637     log_error("bbsnet_io_buf_conv(input, %d, %d, %d) error\n", input_buf_len, input_buf_offset, input_conv_len);
638     }
639     }
640    
641     while (input_conv_offset < input_conv_len && !SYS_server_exit)
642     {
643     ret = (int)write(sock, input_conv + input_conv_offset, (size_t)(input_conv_len - input_conv_offset));
644 sysadm 1.59 if (ret < 0)
645 sysadm 1.36 {
646 sysadm 1.59 if (errno == EAGAIN || errno == EWOULDBLOCK)
647 sysadm 1.36 {
648 sysadm 1.59 sock_write_wait = 0;
649     break;
650 sysadm 1.38 }
651 sysadm 1.59 else if (errno == EINTR)
652 sysadm 1.38 {
653 sysadm 1.59 continue;
654     }
655     else
656     {
657     log_error("write(socket) error (%d)\n", errno);
658 sysadm 1.36 loop = 0;
659 sysadm 1.38 break;
660     }
661 sysadm 1.59 }
662     else if (ret == 0) // broken pipe
663     {
664     #ifdef _DEBUG
665     log_error("write(socket) EOF\n");
666     #endif
667     sock_write_wait = 0;
668     loop = 0;
669     break;
670     }
671     else
672     {
673 sysadm 1.60 input_conv_offset += ret;
674     if (input_conv_offset >= input_conv_len) // Output buffer complete
675 sysadm 1.38 {
676 sysadm 1.60 input_conv_offset = 0;
677     input_conv_len = 0;
678 sysadm 1.59 break;
679 sysadm 1.36 }
680 sysadm 1.59 continue;
681 sysadm 1.36 }
682 sysadm 1.14 }
683 sysadm 1.59 }
684 sysadm 1.36
685 sysadm 1.59 if (sock_read_wait)
686     {
687     while (output_buf_len < sizeof(output_buf) && !SYS_server_exit)
688 sysadm 1.14 {
689 sysadm 1.59 ret = (int)read(sock, output_buf + output_buf_len, sizeof(output_buf) - (size_t)output_buf_len);
690     if (ret < 0)
691 sysadm 1.14 {
692 sysadm 1.59 if (errno == EAGAIN || errno == EWOULDBLOCK)
693 sysadm 1.38 {
694 sysadm 1.59 sock_read_wait = 0;
695     break;
696 sysadm 1.38 }
697 sysadm 1.59 else if (errno == EINTR)
698 sysadm 1.33 {
699 sysadm 1.59 continue;
700 sysadm 1.38 }
701     else
702     {
703 sysadm 1.59 log_error("read(socket) error (%d)\n", errno);
704     loop = 0;
705     break;
706 sysadm 1.33 }
707     }
708 sysadm 1.59 else if (ret == 0) // broken pipe
709     {
710     #ifdef _DEBUG
711     log_error("read(socket) EOF\n");
712     #endif
713     sock_read_wait = 0;
714     loop = 0;
715     break;
716     }
717     else
718     {
719     output_buf_len += ret;
720     continue;
721     }
722 sysadm 1.36 }
723 sysadm 1.59 }
724 sysadm 1.36
725 sysadm 1.59 if (stdout_write_wait)
726     {
727 sysadm 1.60 if (output_buf_offset < output_buf_len)
728     {
729     ret = bbsnet_io_buf_conv(output_cd, output_buf, &output_buf_len, &output_buf_offset, output_conv, sizeof(output_conv), &output_conv_len);
730     if (ret < 0)
731     {
732     log_error("bbsnet_io_buf_conv(output, %d, %d, %d) error\n", output_buf_len, output_buf_offset, output_conv_len);
733     }
734     }
735    
736     while (output_conv_offset < output_conv_len && !SYS_server_exit)
737 sysadm 1.36 {
738 sysadm 1.59 if (SSH_v2)
739 sysadm 1.36 {
740 sysadm 1.60 ret = ssh_channel_write(SSH_channel, output_conv + output_conv_offset, (uint32_t)(output_conv_len - output_conv_offset));
741 sysadm 1.59 if (ret == SSH_ERROR)
742 sysadm 1.47 {
743 sysadm 1.59 log_error("ssh_channel_write() error: %s\n", ssh_get_error(SSH_session));
744     loop = 0;
745     break;
746 sysadm 1.47 }
747 sysadm 1.59 }
748     else
749     {
750 sysadm 1.60 ret = (int)write(STDOUT_FILENO, output_conv + output_conv_offset, (size_t)(output_conv_len - output_conv_offset));
751 sysadm 1.59 }
752     if (ret < 0)
753     {
754     if (errno == EAGAIN || errno == EWOULDBLOCK)
755 sysadm 1.47 {
756 sysadm 1.59 stdout_write_wait = 0;
757     break;
758 sysadm 1.47 }
759 sysadm 1.59 else if (errno == EINTR)
760 sysadm 1.38 {
761 sysadm 1.59 continue;
762 sysadm 1.38 }
763 sysadm 1.59 else
764 sysadm 1.33 {
765 sysadm 1.59 log_error("write(STDOUT) error (%d)\n", errno);
766 sysadm 1.36 loop = 0;
767 sysadm 1.38 break;
768     }
769 sysadm 1.59 }
770     else if (ret == 0) // broken pipe
771     {
772     #ifdef _DEBUG
773     log_error("write(STDOUT) EOF\n");
774     #endif
775     stdout_write_wait = 0;
776     loop = 0;
777     break;
778     }
779     else
780     {
781 sysadm 1.60 output_conv_offset += ret;
782     if (output_conv_offset >= output_conv_len) // Output buffer complete
783 sysadm 1.38 {
784 sysadm 1.60 output_conv_offset = 0;
785     output_conv_len = 0;
786 sysadm 1.59 break;
787 sysadm 1.36 }
788 sysadm 1.59 continue;
789 sysadm 1.36 }
790 sysadm 1.14 }
791 sysadm 1.1 }
792     }
793    
794 sysadm 1.60 iconv_close(input_cd);
795     iconv_close(output_cd);
796    
797 sysadm 1.39 cleanup:
798     if (close(epollfd) < 0)
799     {
800     log_error("close(epoll) error (%d)\n");
801     }
802    
803 sysadm 1.36 // Restore STDIN/STDOUT flags
804     fcntl(STDIN_FILENO, F_SETFL, flags_stdin);
805     fcntl(STDOUT_FILENO, F_SETFL, flags_stdout);
806    
807     // Restore socket flags
808     fcntl(sock, F_SETFL, flags_sock);
809    
810 sysadm 1.14 if (close(sock) == -1)
811     {
812     log_error("Close socket failed\n");
813     }
814 sysadm 1.1
815 sysadm 1.50 t_used = time(NULL) - t_used;
816 sysadm 1.14 tm_used = gmtime(&t_used);
817 sysadm 1.8
818 sysadm 1.46 log_common("BBSNET disconnect, %d days %d hours %d minutes %d seconds used\n",
819 sysadm 1.47 tm_used->tm_mday - 1, tm_used->tm_hour, tm_used->tm_min,
820     tm_used->tm_sec);
821 sysadm 1.8
822 sysadm 1.14 return 0;
823 sysadm 1.1 }
824    
825     static int
826 sysadm 1.14 bbsnet_refresh()
827 sysadm 1.1 {
828 sysadm 1.14 clearscr();
829     moveto(1, 0);
830 sysadm 1.23 prints(" ----------------------------------------------------------------------------- ");
831 sysadm 1.20 for (int i = 2; i < 19; i++)
832 sysadm 1.14 {
833     moveto(i, 0);
834 sysadm 1.23 prints("|");
835 sysadm 1.14 moveto(i, 79);
836 sysadm 1.23 prints("|");
837 sysadm 1.14 }
838     moveto(19, 0);
839 sysadm 1.23 prints("|-----------------------------------------------------------------------------|");
840 sysadm 1.14 moveto(22, 0);
841 sysadm 1.23 prints(" ----------------------------------------------------------------------------- ");
842 sysadm 1.14 moveto(23, 0);
843 sysadm 1.57 prints(" [\x1b[1;32mCtrl+C\x1b[m]退出");
844 sysadm 1.13
845 sysadm 1.14 iflush();
846 sysadm 1.1
847 sysadm 1.14 return 0;
848 sysadm 1.1 }
849    
850 sysadm 1.43 int bbsnet_selchange()
851 sysadm 1.1 {
852 sysadm 1.43 int i = bbsnet_menu.menu_item_pos[0];
853    
854 sysadm 1.14 moveto(20, 0);
855     clrtoeol();
856 sysadm 1.57 prints("|\x1b[1m单位:\x1b[1;33m%-18s\x1b[m 站名:\x1b[1;33m%s\x1b[m",
857 sysadm 1.43 bbsnet_conf[i].host2, bbsnet_conf[i].host1);
858 sysadm 1.14 moveto(20, 79);
859 sysadm 1.23 prints("|");
860 sysadm 1.14 moveto(21, 0);
861     clrtoeol();
862 sysadm 1.57 prints("|\x1b[1m连往:\x1b[1;33m%-20s", bbsnet_conf[i].ip);
863 sysadm 1.43 if (bbsnet_conf[i].port != 23)
864 sysadm 1.20 {
865 sysadm 1.43 prints(" %d", bbsnet_conf[i].port);
866 sysadm 1.20 }
867 sysadm 1.14 prints("\x1b[m");
868     moveto(21, 79);
869 sysadm 1.23 prints("|");
870 sysadm 1.14 iflush();
871 sysadm 1.1
872 sysadm 1.14 return 0;
873 sysadm 1.1 }
874    
875 sysadm 1.14 int bbs_net()
876 sysadm 1.1 {
877 sysadm 1.43 int ch, i;
878 sysadm 1.1
879 sysadm 1.17 load_bbsnet_conf(CONF_BBSNET);
880 sysadm 1.1
881 sysadm 1.50 BBS_last_access_tm = time(NULL);
882 sysadm 1.14
883     clearscr();
884     bbsnet_refresh();
885 sysadm 1.41 display_menu(&bbsnet_menu);
886 sysadm 1.43 bbsnet_selchange();
887 sysadm 1.14
888 sysadm 1.26 while (!SYS_server_exit)
889 sysadm 1.1 {
890 sysadm 1.39 ch = igetch(100);
891 sysadm 1.52
892 sysadm 1.14 switch (ch)
893     {
894 sysadm 1.47 case KEY_NULL: // broken pipe
895 sysadm 1.45 case KEY_ESC:
896 sysadm 1.35 case Ctrl('C'): // user cancel
897 sysadm 1.40 goto cleanup;
898 sysadm 1.14 case KEY_TIMEOUT:
899 sysadm 1.50 if (time(NULL) - BBS_last_access_tm >= MAX_DELAY_TIME)
900 sysadm 1.14 {
901 sysadm 1.40 goto cleanup;
902 sysadm 1.14 }
903 sysadm 1.29 continue;
904 sysadm 1.14 case CR:
905 sysadm 1.41 igetch_reset();
906 sysadm 1.43 bbsnet_connect(bbsnet_menu.menu_item_pos[0]);
907 sysadm 1.14 bbsnet_refresh();
908 sysadm 1.41 display_menu(&bbsnet_menu);
909 sysadm 1.43 bbsnet_selchange();
910 sysadm 1.14 break;
911     case KEY_UP:
912     for (i = 0; i < STATION_PER_LINE; i++)
913 sysadm 1.20 {
914 sysadm 1.14 menu_control(&bbsnet_menu, KEY_UP);
915 sysadm 1.20 }
916 sysadm 1.43 bbsnet_selchange();
917 sysadm 1.14 break;
918     case KEY_DOWN:
919     for (i = 0; i < STATION_PER_LINE; i++)
920 sysadm 1.20 {
921 sysadm 1.14 menu_control(&bbsnet_menu, KEY_DOWN);
922 sysadm 1.20 }
923 sysadm 1.43 bbsnet_selchange();
924 sysadm 1.14 break;
925     case KEY_LEFT:
926     menu_control(&bbsnet_menu, KEY_UP);
927 sysadm 1.43 bbsnet_selchange();
928 sysadm 1.14 break;
929     case KEY_RIGHT:
930     menu_control(&bbsnet_menu, KEY_DOWN);
931 sysadm 1.43 bbsnet_selchange();
932     break;
933 sysadm 1.44 case KEY_HOME:
934 sysadm 1.43 case KEY_PGUP:
935     menu_control(&bbsnet_menu, KEY_PGUP);
936     bbsnet_selchange();
937 sysadm 1.14 break;
938 sysadm 1.44 case KEY_END:
939     case KEY_PGDN:
940     menu_control(&bbsnet_menu, KEY_PGDN);
941     bbsnet_selchange();
942     break;
943 sysadm 1.14 default:
944     menu_control(&bbsnet_menu, ch);
945 sysadm 1.43 bbsnet_selchange();
946 sysadm 1.14 break;
947     }
948 sysadm 1.50 BBS_last_access_tm = time(NULL);
949 sysadm 1.1 }
950    
951 sysadm 1.40 cleanup:
952     unload_bbsnet_conf();
953    
954 sysadm 1.14 return 0;
955 sysadm 1.1 }
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