/* $Id: mbbsd.c,v 1.28 2002/05/18 13:23:39 in2 Exp $ */
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <setjmp.h>
#include <signal.h>
#include <unistd.h>
#include <fcntl.h>
#include <syslog.h>
#include <errno.h>
#include <netdb.h>
#include <time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <arpa/telnet.h>
#include "config.h"
#include "pttstruct.h"
#include "common.h"
#include "perm.h"
#include "modes.h"
#include "proto.h"
#ifdef FreeBSD
#include <machine/limits.h>
#else
#include <limits.h>
#endif
#define SOCKET_QLEN 4
#define TH_LOW 100
#define TH_HIGH 120
extern int t_lines, t_columns; /* Screen size / width */
extern int b_lines; /* Screen bottom line number: t_lines-1 */
extern userinfo_t *currutmp;
extern time_t now;
static void do_aloha (char *hello);
#if 0
static jmp_buf byebye;
#endif
int talkrequest = NA;
static char remoteusername[40] = "?";
extern struct fromcache_t *fcache;
extern struct utmpfile_t *utmpshm;
extern int fcache_semid;
static unsigned char enter_uflag;
static int use_shell_login_mode = 0;
char fromhost[STRLEN] = "\0";
static struct sockaddr_in xsin;
/* set signal handler, which won't be reset once signal comes */
static void
signal_restart (int signum, void (*handler) (int))
{
struct sigaction act;
act.sa_handler = handler;
memset (&(act.sa_mask), 0, sizeof (sigset_t));
act.sa_flags = 0;
sigaction (signum, &act, NULL);
}
static void
start_daemon ()
{
int n;
char buf[80];
/*
* More idiot speed-hacking --- the first time conversion makes the C
* library open the files containing the locale definition and time zone.
* If this hasn't happened in the parent process, it happens in the
* children, once per connection --- and it does add up.
*/
time_t dummy = time (NULL);
struct tm *dummy_time = localtime (&dummy);
strftime (buf, 80, "%d/%b/%Y:%H:%M:%S", dummy_time);
#ifndef NO_FORK
if ((n = fork ())){
exit (0);
}
#endif
/* rocker.011018: it's a good idea to close all unexcept fd!! */
n = getdtablesize ();
while (n)
close (--n);
/* rocker.011018: we don't need to remember original tty,
so request a new session id */
setsid ();
/* rocker.011018: after new session,
we should insure the process is clean daemon */
#ifndef NO_FORK
if ((n = fork ())){
exit (0);
}
#endif
}
static void
reapchild (int sig)
{
int state, pid;
while ((pid = waitpid (-1, &state, WNOHANG | WUNTRACED)) > 0)
;
}
#define BANNER \
"【" BBSNAME "】◎ 台大流行網 ◎(" MYHOSTNAME ") 調幅(" MYIP ") "
/*
#define BANNER \
"【" BBSNAME "】◎ 台大流行網 ◎(" MYHOSTNAME ")\r\n"\
" 調幅(" MYIP ") "
*/
/* check load and print approriate banner string in buf */
static int
chkload (char *buf)
{
char cpu_load[30];
int i;
i = cpuload (cpu_load);
sprintf (buf, BANNER" 系統負荷\r\n %s %s \r\n", cpu_load,
(i > MAX_CPULOAD ? "，高負荷量，請稍後再來 "
"(請利用port 3000~3010連線)" : ""));
#ifdef INSCREEN
strcpy(buf, (i > MAX_CPULOAD ? BANNER
"高負荷量，請稍後再來(請利用port 3000~3010連線)" : ""));
#else
sprintf(buf, BANNER "%s\r\n",
(i > MAX_CPULOAD ? "高負荷量，請稍後再來(請利用port 3000~3010連線)":""));
#endif
if (i > MAX_CPULOAD)
return 1;
return 0;
}
extern userec_t cuser;
void
log_user (char *msg)
{
char filename[200];
sprintf (filename, BBSHOME "/home/%c/%s/USERLOG",
cuser.userid[0], cuser.userid);
log_file (filename, msg);
}
extern time_t login_start_time;
void
log_usies (char *mode, char *mesg)
{
char genbuf[200];
if (!mesg)
sprintf (genbuf, cuser.userid[0] ? "%s %s %-12s Stay:%d (%s)" :
"%s %s %s Stay:%d (%s)",
Cdate (&now), mode, cuser.userid,
(int)(now - login_start_time) / 60, cuser.username);
else
sprintf (genbuf, cuser.userid[0] ? "%s %s %-12s %s" : "%s %s %s%s",
Cdate (&now), mode, cuser.userid, mesg);
log_file (FN_USIES, genbuf);
/* 追蹤使用者 */
if (HAS_PERM (PERM_LOGUSER))
log_user (genbuf);
}
static void
setflags (int mask, int value)
{
if (value)
cuser.uflag |= mask;
else
cuser.uflag &= ~mask;
}
extern int usernum;
extern int currmode;
void
u_exit (char *mode)
{
//userec_t xuser;
int diff = (time (0) - login_start_time) / 60;
/* close fd 0 & a to terminate network */
close(0);
close(1);
/* random sleep to avoid MANY users logout at the same time */
usleep((int)((float)rand() * 10000000 / RAND_MAX));
reload_money();
auto_backup ();
save_brdbuf();
setflags (PAGER_FLAG, currutmp->pager != 1);
setflags (CLOAK_FLAG, currutmp->invisible);
cuser.invisible = currutmp->invisible;
cuser.pager = currutmp->pager;
cuser.mind = currutmp->mind;
if (!(HAS_PERM (PERM_SYSOP) && HAS_PERM (PERM_DENYPOST)) &&
!currutmp->invisible )
do_aloha ("<<下站通知>> -- 我走囉！");
purge_utmp (currutmp);
if ((cuser.uflag != enter_uflag) || (currmode & MODE_DIRTY) || diff){
if (!diff && cuser.numlogins)
cuser.numlogins = --cuser.numlogins;
/* Leeym 上站停留時間限制式 */
}
passwd_update (usernum, &cuser);
log_usies (mode, NULL);
}
void
system_abort ()
{
if (currmode)
u_exit ("ABORT");
clear ();
refresh ();
fprintf (stdout, "謝謝光臨, 記得常來喔 !\n");
exit (0);
}
void
abort_bbs (int sig)
{
if (currmode)
u_exit ("AXXED");
exit (0);
}
static void
abort_bbs_debug (int sig)
{
static int reentrant = 0;
if (!reentrant){
int i;
/* close all file descriptors (including the network connection) */
for( i = 0 ; i < 256 ; ++i )
close(i);
reentrant = 1;
if (currmode)
u_exit ("AXXED");
setproctitle("debug me!(%d)",sig);
sleep(3600); /* wait 60 mins for debug */
}
exit (0);
}
/* 登錄 BBS 程式 */
static void
mysrand ()
{
srand (time (NULL) + currutmp->pid); /* 時間跟 pid 當 rand 的 seed */
}
extern userec_t xuser;
int
dosearchuser (char *userid)
{
if ((usernum = getuser (userid)))
memcpy (&cuser, &xuser, sizeof (cuser));
else
memset (&cuser, 0, sizeof (cuser));
return usernum;
}
static void
talk_request(int sig)
{
bell ();
bell ();
if (currutmp->msgcount){
char buf[200];
time_t now = time (0);
sprintf (buf, "\033[33;41m★%s\033[34;47m [%s] %s \033[0m",
utmpshm->uinfo[currutmp->destuip].userid, my_ctime (&now),
(currutmp->sig == 2)? "重要消息廣播！(請Ctrl-U,l查看熱訊記錄)"
: "呼叫、呼叫，聽到請回答");
move (0, 0);
clrtoeol ();
outs (buf);
refresh ();
}
else{
unsigned char mode0 = currutmp->mode;
char c0 = currutmp->chatid[0];
screenline_t *screen0 = calloc (t_lines, sizeof (screenline_t));
extern screenline_t *big_picture;
currutmp->mode = 0;
currutmp->chatid[0] = 1;
memcpy (screen0, big_picture, t_lines * sizeof (screenline_t));
talkreply ();
currutmp->mode = mode0;
currutmp->chatid[0] = c0;
memcpy (big_picture, screen0, t_lines * sizeof (screenline_t));
free (screen0);
redoscr ();
}
}
extern char *fn_writelog;
FILE *fp_writelog = NULL;
void
show_call_in(int save, int which)
{
char buf[200];
sprintf (buf, "\033[1;33;46m★%s\033[37;45m %s \033[m",
currutmp->msgs[which].userid, currutmp->msgs[which].last_call_in);
move (b_lines, 0);
clrtoeol ();
refresh ();
outmsg (buf);
if (save){
char genbuf[200];
time_t now;
if (!fp_writelog){
sethomefile (genbuf, cuser.userid, fn_writelog);
fp_writelog = fopen (genbuf, "a");
}
if (fp_writelog){
time (&now);
fprintf (fp_writelog, "%s \033[0m[%s]\n", buf, Cdatelite (&now));
}
}
}
extern unsigned int currstat;
water_t water[6], *swater[6], *water_which=&water[0];
char water_usies=0;
extern int watermode, wmofo;
static int add_history_water(water_t *w, msgque_t *msg)
{
// mode: 1: all data(including userid, pid);
// 0: only last_call_in Ptt:先改回來 省不多 進階會有問題
memcpy(&w->msg[w->top], msg, sizeof(msgque_t));
w->top++;
w->top %= WATERMODE(WATER_OFO) ? 5 : MAX_REVIEW;
if (w->count < MAX_REVIEW)
w->count++;
return w->count;
}
static int
add_history(msgque_t *msg)
{
int i = 0, j, waterinit = 0;
water_t *tmp;
if( WATERMODE(WATER_ORIG) || WATERMODE(WATER_NEW) )
add_history_water(&water[0], msg);
if( WATERMODE(WATER_NEW) || WATERMODE(WATER_OFO) ){
for(i = 0 ; i < 5 && swater[i] ; i++ )
if( swater[i]->pid == msg->pid )
break;
if( i == 5 ){
waterinit = 1;
i = 4;
memset(swater[4], 0, sizeof(water_t));
}
else if( !swater[i] ){
water_usies = i + 1;
swater[i] = &water[i + 1];
waterinit = 1;
}
tmp = swater[i];
if( waterinit ){
memcpy(swater[i]->userid, msg->userid, sizeof(swater[i]->userid));
swater[i]->pid = msg->pid;
}
if( !swater[i]->uin )
swater[i]->uin = currutmp;
for( j = i ; j > 0 ; j-- )
swater[j] = swater[j - 1];
swater[0] = tmp;
add_history_water(swater[0], msg);
}
if(WATERMODE(WATER_ORIG) || WATERMODE(WATER_NEW) ){
if( watermode > 0 &&
(water_which == swater[0] || water_which == &water[0]) ){
if (watermode < water_which->count)
watermode++;
t_display_new();
}
}
return i;
}
void
write_request (int sig)
{
int i;
if( WATERMODE(WATER_OFO) ){
/* sig = SIGUSR2 waterball come in
0 flush to water[] (by my_write2())
*/
if( sig != 0 ){
if( wmofo == 0 ) /* 正在回水球 */
wmofo = 1;
bell ();
show_call_in(1, currutmp->msgcount - 1);
refresh ();
}
if( sig == 0 || /* 回水球的時候又有水球進來, 回完後一次寫回去 */
wmofo == -1 ){ /* 不在回水球模式 */
do{
add_history(&currutmp->msgs[0]);
if( currutmp->msgcount-- )
for (i = 0; i < currutmp->msgcount; i++)
currutmp->msgs[i] = currutmp->msgs[i + 1];
}
while (currutmp->msgcount);
currutmp->msgcount = 0;
}
}
else{
if (currutmp->mode != 0 &&
currutmp->pager != 0 &&
cuser.userlevel != 0 &&
currutmp->msgcount != 0 &&
currutmp->mode != TALK &&
currutmp->mode != EDITING &&
currutmp->mode != CHATING &&
currutmp->mode != PAGE &&
currutmp->mode != IDLE &&
currutmp->mode != MAILALL && currutmp->mode != MONITOR){
char c0 = currutmp->chatid[0];
int currstat0 = currstat;
unsigned char mode0 = currutmp->mode;
currutmp->mode = 0;
currutmp->chatid[0] = 2;
currstat = XMODE;
do{
bell ();
show_call_in(1, 0);
igetch ();
currutmp->msgcount--;
if (currutmp->msgcount >= MAX_MSGS){
/* this causes chaos... jochang */
raise (SIGFPE);
}
add_history(&currutmp->msgs[0]);
for (i = 0; i < currutmp->msgcount; i++)
currutmp->msgs[i] = currutmp->msgs[i + 1];
}
while (currutmp->msgcount);
currutmp->chatid[0] = c0;
currutmp->mode = mode0;
currstat = currstat0;
}
else{
bell ();
show_call_in(1, 0);
add_history(&currutmp->msgs[0]);
refresh ();
currutmp->msgcount = 0;
}
}
}
static void
multi_user_check ()
{
register userinfo_t *ui;
register pid_t pid;
char genbuf[3];
if (HAS_PERM (PERM_SYSOP))
return; /* don't check sysops */
if (cuser.userlevel){
if (!(ui = (userinfo_t *) search_ulist (usernum)))
return; /* user isn't logged in */
pid = ui->pid;
if (!pid /*|| (kill(pid, 0) == -1) */ )
return; /* stale entry in utmp file */
getdata (b_lines - 1, 0, "您想刪除其他重複的 login (Y/N)嗎？[Y] ",
genbuf, 3, LCECHO);
if (genbuf[0] != 'n'){
if (pid > 0)
kill (pid, SIGHUP);
log_usies ("KICK ", cuser.username);
}
else{
if (search_ulistn(usernum, 3)!=NULL)
system_abort (); /* Goodbye(); */
}
}
else{
/* allow multiple guest user */
if (search_ulistn(usernum, 100)!=NULL){
outs ("\n抱歉，目前已有太多 guest 在站上, 請用new註冊。\n");
pressanykey ();
oflush ();
exit (1);
}
}
}
/* bad login */
static char str_badlogin[] = "logins.bad";
static void
logattempt (char *uid, char type)
{
char fname[40];
int fd, len;
char genbuf[200];
sprintf (genbuf, "%c%-12s[%s] %s@%s\n", type, uid,
Cdate (&login_start_time), remoteusername, fromhost);
len = strlen (genbuf);
if ((fd = open (str_badlogin, O_WRONLY | O_CREAT | O_APPEND, 0644)) > 0){
write (fd, genbuf, len);
close (fd);
}
if (type == '-'){
sprintf (genbuf, "[%s] %s\n", Cdate (&login_start_time), fromhost);
len = strlen (genbuf);
sethomefile (fname, uid, str_badlogin);
if ((fd = open (fname, O_WRONLY | O_CREAT | O_APPEND, 0644)) > 0){
write (fd, genbuf, len);
close (fd);
}
}
}
extern char *str_new;
extern char *err_uid;
static void
login_query ()
{
char uid[IDLEN + 1], passbuf[PASSLEN];
int attempts;
char genbuf[200];
extern struct utmpfile_t *utmpshm;
resolve_utmp ();
resolve_garbage ();
attach_uhash ();
now= time(0);
attempts = utmpshm->number;
show_file ("etc/Welcome", 1, -1, NO_RELOAD);
output ("1", 1);
if (attempts >= MAX_ACTIVE){
outs ("由於人數太多，請您稍後再來。\n");
refresh ();
exit (1);
}
/* hint */
attempts = 0;
while (1){
if (attempts++ >= LOGINATTEMPTS){
more ("etc/goodbye", NA);
pressanykey ();
exit (1);
}
getdata (20, 0, "請輸入代號，或以[guest]參觀，以[new]註冊：",
uid, sizeof(uid), DOECHO);
if (strcasecmp (uid, str_new) == 0){
#ifdef LOGINASNEW
new_register ();
break;
#else
outs ("本系統目前無法以 new 註冊, 請用 guest 進入\n");
continue;
#endif
}
else if (uid[0] == '\0' || !dosearchuser (uid)){
outs (err_uid);
}
else if (strcmp (uid, STR_GUEST)){
getdata (21, 0, MSG_PASSWD, passbuf, sizeof(passbuf), NOECHO);
passbuf[8] = '\0';
if (!checkpasswd (cuser.passwd, passbuf)
/* || (HAS_PERM(PERM_SYSOP) && !use_shell_login_mode) */ ){
logattempt (cuser.userid, '-');
outs (ERR_PASSWD);
}
else{
logattempt (cuser.userid, ' ');
if (strcasecmp ("SYSOP", cuser.userid) == 0)
cuser.userlevel = PERM_BASIC | PERM_CHAT | PERM_PAGE |
PERM_POST | PERM_LOGINOK | PERM_MAILLIMIT |
PERM_CLOAK | PERM_SEECLOAK | PERM_XEMPT |
PERM_DENYPOST | PERM_BM | PERM_ACCOUNTS |
PERM_CHATROOM | PERM_BOARD | PERM_SYSOP | PERM_BBSADM;
break;
}
}
else{ /* guest */
cuser.userlevel = 0;
cuser.uflag = COLOR_FLAG | PAGER_FLAG | BRDSORT_FLAG | MOVIE_FLAG;
break;
}
}
multi_user_check ();
sethomepath (genbuf, cuser.userid);
mkdir (genbuf, 0755);
}
void
add_distinct (char *fname, char *line)
{
FILE *fp;
int n = 0;
if ((fp = fopen (fname, "a+"))){
char buffer[80];
char tmpname[100];
FILE *fptmp;
strcpy (tmpname, fname);
strcat (tmpname, "_tmp");
if (!(fptmp = fopen (tmpname, "w"))){
fclose (fp);
return;
}
rewind (fp);
while (fgets (buffer, 80, fp)){
char *p = buffer + strlen (buffer) - 1;
if (p[-1] == '\n' || p[-1] == '\r')
p[-1] = 0;
if (!strcmp (buffer, line))
break;
sscanf (buffer + strlen (buffer) + 2, "%d", &n);
fprintf (fptmp, "%s%c#%d\n", buffer, 0, n);
}
if (feof (fp))
fprintf (fptmp, "%s%c#1\n", line, 0);
else{
sscanf (buffer + strlen (buffer) + 2, "%d", &n);
fprintf (fptmp, "%s%c#%d\n", buffer, 0, n + 1);
while (fgets (buffer, 80, fp)){
sscanf (buffer + strlen (buffer) + 2, "%d", &n);
fprintf (fptmp, "%s%c#%d\n", buffer, 0, n);
}
}
fclose (fp);
fclose (fptmp);
unlink (fname);
rename (tmpname, fname);
}
}
void
del_distinct (char *fname, char *line)
{
FILE *fp;
int n = 0;
if ((fp = fopen (fname, "r"))){
char buffer[80];
char tmpname[100];
FILE *fptmp;
strcpy (tmpname, fname);
strcat (tmpname, "_tmp");
if (!(fptmp = fopen (tmpname, "w"))){
fclose (fp);
return;
}
rewind (fp);
while (fgets (buffer, 80, fp)){
char *p = buffer + strlen (buffer) - 1;
if (p[-1] == '\n' || p[-1] == '\r')
p[-1] = 0;
if (!strcmp (buffer, line))
break;
sscanf (buffer + strlen (buffer) + 2, "%d", &n);
fprintf (fptmp, "%s%c#%d\n", buffer, 0, n);
}
if (!feof (fp))
while (fgets (buffer, 80, fp)){
sscanf (buffer + strlen (buffer) + 2, "%d", &n);
fprintf (fptmp, "%s%c#%d\n", buffer, 0, n);
}
fclose (fp);
fclose (fptmp);
unlink (fname);
rename (tmpname, fname);
}
}
#ifdef WHERE
static int
where (char *from)
{
register int i = 0, count = 0, j;
for (j = 0; j < fcache->top; j++){
char *token = strtok (fcache->domain[j], "&");
i = 0;
count = 0;
while (token){
if (strstr (from, token))
count++;
token = strtok (NULL, "&");
i++;
}
if (i == count)
break;
}
if (i != count)
return 0;
return j;
}
#endif
static void
check_BM ()
{
int i;
boardheader_t *bhdr;
extern boardheader_t *bcache;
extern int numboards;
cuser.userlevel &= ~PERM_BM;
for (i = 0, bhdr = bcache; i < numboards && !is_BM (bhdr->BM); i++, bhdr++)
;
}
extern pid_t currpid;
extern crosspost_t postrecord;
static void
setup_utmp (int mode)
{
userinfo_t uinfo;
memset (&uinfo, 0, sizeof (uinfo));
uinfo.pid = currpid = getpid ();
uinfo.uid = usernum;
uinfo.mode = currstat = mode;
uinfo.msgcount = 0;
uinfo.mailalert = load_mailalert (cuser.userid);
if (!(cuser.numlogins % 20) && cuser.userlevel & PERM_BM)
check_BM (); /* Ptt 自動取下離職板主權力 */
uinfo.userlevel = cuser.userlevel;
uinfo.sex = cuser.sex % 8;
uinfo.lastact = time (NULL);
postrecord.times = 0; /* 計算crosspost數 */
strcpy (uinfo.userid, cuser.userid);
strcpy (uinfo.realname, cuser.realname);
strcpy (uinfo.username, cuser.username);
strncpy (uinfo.from, fromhost, 23);
uinfo.five_win = cuser.five_win;
uinfo.five_lose = cuser.five_lose;
uinfo.five_tie = cuser.five_tie;
uinfo.invisible = cuser.invisible % 2;
uinfo.pager = cuser.pager%5;
uinfo.mind = cuser.mind;
uinfo.brc_id = 0;
#ifdef WHERE
uinfo.from_alias = where (fromhost);
#else
uinfo.from_alias = 0;
#endif
#ifndef FAST_LOGIN
setuserfile (buf, "remoteuser");
strcpy (remotebuf, fromhost);
strcat (remotebuf, ctime (&now));
remotebuf[strlen (remotebuf) - 1] = 0;
add_distinct (buf, remotebuf);
#endif
if (enter_uflag & CLOAK_FLAG)
uinfo.invisible = YEA;
getnewutmpent (&uinfo);
#ifndef _BBS_UTIL_C_
friend_load ();
#endif
}
extern char margs[];
extern char *str_sysop;
extern char *loginview_file[NUMVIEWFILE][2];
static void
user_login ()
{
char ans[4], i;
char genbuf[200];
struct tm *ptime, *tmp;
time_t now;
int a;
/*** Heat:廣告詞
char *ADV[] = {
"7/17 @LIVE 亂彈, 何欣穗 的 入場卷要送給 ptt 的愛用者!",
"欲知詳情請看 PttAct 板!!",
}; ***/
log_usies ("ENTER", fromhost);
setproctitle ("%s: %s", margs, cuser.userid);
resolve_fcache ();
resolve_boards ();
memset( &water[0],0,sizeof(water_t) * 6);
strcpy(water[0].userid, " 全部 ");
/* 初始化 uinfo、flag、mode */
setup_utmp (LOGIN);
mysrand (); /* 初始化: random number 增加user跟時間的差異 */
currmode = MODE_STARTED;
enter_uflag = cuser.uflag;
/* get local time */
time (&now);
ptime = localtime (&now);
tmp = localtime (&cuser.lastlogin);
if ((a = utmpshm->number) > fcache->max_user){
fcache->max_user = a;
fcache->max_time = now;
}
init_brdbuf();
brc_initial (DEFAULT_BOARD);
set_board ();
/* 畫面處理開始 */
if (!(HAS_PERM (PERM_SYSOP) && HAS_PERM (PERM_DENYPOST)) && !currutmp->invisible )
do_aloha ("<<上站通知>> -- 我來啦！");
if (ptime->tm_mday == cuser.day && ptime->tm_mon + 1 == cuser.month){
more ("etc/Welcome_birth", NA);
currutmp->birth = 1;
}
else{
#ifdef MULTI_WELCOME_LOGIN
char buf[80];
int nScreens;
for( nScreens = 0 ; nScreens < 10 ; ++nScreens ){
sprintf(buf, "etc/Welcome_login.%d", nScreens);
if( access(buf, 0) < 0 )
break;
}
printf("%d\n", nScreens);
if( nScreens == 0 ){ // multi screen error?
more ("etc/Welcome_login", NA);
}
else{
sprintf(buf, "etc/Welcome_login.%d", (int)login_start_time % nScreens);
more (buf, NA);
}
#else
more ("etc/Welcome_login", NA);
#endif
//pressanykey();
//more("etc/CSIE_Week", NA);
currutmp->birth = 0;
}
if (cuser.userlevel){/* not guest */
move (t_lines - 4, 0);
prints ("\033[m 歡迎您第 \033[1;33m%d\033[0;37m 度拜訪本站，"
"上次您是從 \033[1;33m%s\033[0;37m 連往本站，\n"
" 我記得那天是 \033[1;33m%s\033[0;37m。\n",
++cuser.numlogins, cuser.lasthost, Cdate (&cuser.lastlogin));
pressanykey ();
if (currutmp->birth && tmp->tm_mday != ptime->tm_mday){
more ("etc/birth.post", YEA);
brc_initial ("WhoAmI");
set_board ();
do_post ();
}
setuserfile (genbuf, str_badlogin);
if (more (genbuf, NA) != -1){
getdata (b_lines - 1, 0, "您要刪除以上錯誤嘗試的記錄嗎(Y/N)?[Y]",
ans, 3, LCECHO);
if (*ans != 'n')
unlink (genbuf);
}
check_register ();
strncpy (cuser.lasthost, fromhost, 16);
cuser.lasthost[15] = '\0';
restore_backup ();
}
else if (!strcmp (cuser.userid, STR_GUEST)){
char *nick[13] = {
"椰子", "貝殼", "內衣", "寶特瓶", "翻車魚",
"樹葉", "浮萍", "鞋子", "潛水艇", "魔王",
"鐵罐", "考卷", "大美女"
};
char *name[13] = {
"大王椰子", "鸚鵡螺", "比基尼", "可口可樂", "仰泳的魚",
"憶", "高岡屋", "AIR Jordon", "紅色十月號", "批踢踢",
"SASAYA椰奶", "鴨蛋", "布魯克鱈魚香絲"
};
char *addr[13] = {
"天堂樂園", "大海", "綠島小夜曲", "美國", "綠色珊瑚礁",
"遠方", "原本海", "NIKE", "蘇聯", "男八618室",
"愛之味", "天上", "藍色珊瑚礁"
};
i = login_start_time % 13;
sprintf (cuser.username, "海邊漂來的%s", nick[(int) i]);
sprintf (currutmp->username, cuser.username);
sprintf (cuser.realname, name[(int) i]);
sprintf (currutmp->realname, cuser.realname);
sprintf (cuser.address, addr[(int) i]);
cuser.sex = i % 8;
currutmp->pager = 2;
pressanykey ();
}
else
pressanykey ();
if (!PERM_HIDE (currutmp))
cuser.lastlogin = login_start_time;
passwd_update (usernum, &cuser);
for (i = 0; i < NUMVIEWFILE; i++)
if ((cuser.loginview >> i) & 1)
more (loginview_file[(int) i][0], YEA);
}
static void
do_aloha (char *hello)
{
FILE *fp;
char userid[80];
char genbuf[200];
setuserfile (genbuf, "aloha");
if ((fp = fopen (genbuf, "r"))){
sprintf (genbuf, hello);
while (fgets (userid, 80, fp)){
userinfo_t *uentp;
int tuid;
if ((tuid = searchuser (userid)) && tuid != usernum &&
(uentp = (userinfo_t *) search_ulist (tuid)) &&
isvisible(uentp, currutmp)){
my_write (uentp->pid, genbuf, uentp->userid, 2, NULL);
}
}
fclose (fp);
}
}
static void
do_term_init ()
{
term_init ();
initscr ();
}
extern char *fn_register;
extern int showansi;
static void
start_client ()
{
extern struct commands_t cmdlist[];
#ifdef CPULIMIT
struct rlimit rml;
rml.rlim_cur = CPULIMIT * 60;
rml.rlim_max = CPULIMIT * 60;
setrlimit(RLIMIT_CPU, &rml);
#endif
/* system init */
nice (2); /* Ptt: lower priority */
login_start_time = time (0);
currmode = 0;
signal (SIGHUP, abort_bbs);
signal (SIGTERM, abort_bbs);
signal (SIGPIPE, abort_bbs);
signal (SIGINT, abort_bbs_debug);
signal (SIGQUIT, abort_bbs_debug);
signal (SIGILL, abort_bbs_debug);
signal (SIGABRT, abort_bbs_debug);
signal (SIGFPE, abort_bbs_debug);
signal (SIGBUS, abort_bbs_debug);
signal (SIGSEGV, abort_bbs_debug);
signal_restart (SIGUSR1, talk_request);
signal_restart (SIGUSR2, write_request);
dup2 (0, 1);
do_term_init ();
signal (SIGALRM, abort_bbs);
alarm (600);
login_query (); /* Ptt 加上login time out */
user_login ();
m_init ();
if (HAVE_PERM (PERM_SYSOP | PERM_BM))
b_closepolls ();
if (!(cuser.uflag & COLOR_FLAG))
showansi = 0;
signal (SIGALRM, SIG_IGN);
if (chkmailbox ())
m_read ();
domenu (MMENU, "主功\能表", (currutmp->mailalert ? 'M' : 'C'), cmdlist);
}
/* FSA (finite state automata) for telnet protocol */
static void
telnet_init ()
{
static char svr[] = {
IAC, DO, TELOPT_TTYPE,
IAC, SB, TELOPT_TTYPE, TELQUAL_SEND, IAC, SE,
IAC, WILL, TELOPT_ECHO,
IAC, WILL, TELOPT_SGA
};
char *cmd;
int n, len, rset;
struct timeval to;
char buf[64];
for (n = 0, cmd = svr; n < 4; n++){
len = (n == 1 ? 6 : 3);
write (0, cmd, len);
cmd += len;
to.tv_sec = 3;
to.tv_usec = 0;
rset=1;
if (select (1, (fd_set *) & rset, NULL, NULL, &to) > 0)
recv(0, buf, sizeof (buf),0);
}
}
/* 取得 remote user name 以判定身份 */
/*
* rfc931() speaks a common subset of the RFC 931, AUTH, TAP, IDENT and RFC
* 1413 protocols. It queries an RFC 931 etc. compatible daemon on a remote
* host to look up the owner of a connection. The information should not be
* used for authentication purposes. This routine intercepts alarm signals.
*
* Author: Wietse Venema, Eindhoven University of Technology, The Netherlands.
*/
#define STRN_CPY(d,s,l) { strncpy((d),(s),(l)); (d)[(l)-1] = 0; }
#define RFC931_TIMEOUT 10
#define RFC931_PORT 113 /* Semi-well-known port */
#define ANY_PORT 0 /* Any old port will do */
#if 0
/* timeout - handle timeouts */
static void
timeout (int sig)
{
longjmp (byebye, sig);
}
#endif
static void
getremotename (struct sockaddr_in *from, char *rhost, char *rname)
{
/* get remote host name */
#ifdef FAST_LOGIN
strcpy (rhost, (char *) inet_ntoa (from->sin_addr));
#else
struct sockaddr_in our_sin;
struct sockaddr_in rmt_sin;
unsigned rmt_port, rmt_pt;
unsigned our_port, our_pt;
FILE *fp;
char buffer[512], user[80], *cp;
int s;
static struct hostent *hp;
hp = NULL;
if (setjmp (byebye) == 0){
signal (SIGALRM, timeout);
alarm (3);
hp = gethostbyaddr ((char *) &from->sin_addr, sizeof (struct in_addr),
from->sin_family);
alarm (0);
}
strcpy (rhost, hp ? hp->h_name : (char *) inet_ntoa (from->sin_addr));
/*
* Use one unbuffered stdio stream for writing to and for reading from the
* RFC931 etc. server. This is done because of a bug in the SunOS 4.1.x
* stdio library. The bug may live in other stdio implementations, too.
* When we use a single, buffered, bidirectional stdio stream ("r+" or "w+"
* mode) we read our own output. Such behaviour would make sense with
* resources that support random-access operations, but not with sockets.
*/
s = sizeof (our_sin);
if (getsockname (0, (struct sockaddr *) &our_sin, &s) < 0)
return;
if ((s = socket (AF_INET, SOCK_STREAM, 0)) < 0)
return;
if (!(fp = fdopen (s, "r+"))){
close (s);
return;
}
/* Set up a timer so we won't get stuck while waiting for the server. */
if (setjmp (byebye) == 0){
signal (SIGALRM, timeout);
alarm (RFC931_TIMEOUT);
/*
* Bind the local and remote ends of the query socket to the same IP
* addresses as the connection under investigation. We go through all
* this trouble because the local or remote system might have more than
* one network address. The RFC931 etc. client sends only port numbers;
* the server takes the IP addresses from the query socket.
*/
our_pt = ntohs (our_sin.sin_port);
our_sin.sin_port = htons (ANY_PORT);
rmt_sin = *from;
rmt_pt = ntohs (rmt_sin.sin_port);
rmt_sin.sin_port = htons (RFC931_PORT);
setbuf (fp, (char *) 0);
s = fileno (fp);
if (bind (s, (struct sockaddr *) &our_sin, sizeof (our_sin)) >= 0 &&
connect (s, (struct sockaddr *) &rmt_sin, sizeof (rmt_sin)) >= 0){
/*
* Send query to server. Neglect the risk that a 13-byte write would
* have to be fragmented by the local system and cause trouble with
* buggy System V stdio libraries.
*/
fprintf (fp, "%u,%u\r\n", rmt_pt, our_pt);
fflush (fp);
/*
* Read response from server. Use fgets()/sscanf() so we can work
* around System V stdio libraries that incorrectly assume EOF when a
* read from a socket returns less than requested.
*/
if (fgets (buffer, sizeof (buffer), fp) && !ferror (fp)
&& !feof (fp)
&& sscanf (buffer, "%u , %u : USERID :%*[^:]:%79s", &rmt_port,
&our_port, user) == 3 && rmt_pt == rmt_port
&& our_pt == our_port){
/*
* Strip trailing carriage return. It is part of the protocol, not
* part of the data.
*/
if ((cp = (char *) strchr (user, '\r')))
*cp = 0;
strcpy (rname, user);
}
}
alarm (0);
}
fclose (fp);
#endif
}
static int
bind_port (int port)
{
int sock, on;
sock = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP);
on = 1;
setsockopt (sock, SOL_SOCKET, SO_REUSEADDR, (char *) &on, sizeof (on));
setsockopt (sock, SOL_SOCKET, SO_KEEPALIVE, (char *) &on, sizeof (on));
on = 0;
setsockopt (sock, SOL_SOCKET, SO_LINGER, (char *) &on, sizeof (on));
xsin.sin_port = htons (port);
if (bind (sock, (struct sockaddr *) &xsin, sizeof xsin) < 0){
syslog (LOG_INFO, "bbsd bind_port can't bind to %d", port);
exit (1);
}
if (listen (sock, SOCKET_QLEN) < 0){
syslog (LOG_INFO, "bbsd bind_port can't listen to %d", port);
exit (1);
}
return sock;
}
/*******************************************************/
static void shell_login (int argc, char *argv[], char *envp[]);
static void daemon_login (int argc, char *argv[], char *envp[]);
static int check_ban_and_load (int fd);
#ifdef SUPPORT_GB
extern int current_font_type;
#endif
int
main (int argc, char *argv[], char *envp[])
{
/* avoid SIGPIPE */
signal (SIGPIPE, SIG_IGN);
/* avoid erroneous signal from other mbbsd */
signal (SIGUSR1, SIG_IGN);
signal (SIGUSR2, SIG_IGN);
/* check if invoked as "bbs" */
if (argc == 3)
shell_login (argc, argv, envp);
else
daemon_login (argc, argv, envp);
return 0;
}
static void
shell_login (int argc, char *argv[], char *envp[])
{
/* Give up root privileges: no way back from here */
setgid (BBSGID);
setuid (BBSUID);
chdir (BBSHOME);
/* mmap passwd file */
if (passwd_mmap ())
exit (1);
use_shell_login_mode = 1;
initsetproctitle (argc, argv, envp);
/* copy fromindent: Standard input:1138: Error:Unexpected end of file
the original "bbs" */
if (argc > 1){
strcpy (fromhost, argv[1]);
if (argc > 3)
strcpy (remoteusername, argv[3]);
}
close (2);
/* don't close fd 1, at least init_tty need it */
init_tty ();
if (check_ban_and_load (0)){
exit (0);
}
start_client ();
}
static void
daemon_login (int argc, char *argv[], char *envp[])
{
int msock, csock; /* socket for Master and Child */
FILE *fp;
int listen_port = 23;
int len_of_sock_addr;
char buf[256];
/* setup standalone */
start_daemon();
signal_restart(SIGCHLD, reapchild);
/* choose port */
if(argc == 1)
listen_port = 3006;
else if(argc >= 2)
listen_port = atoi(argv[1]);
sprintf(margs, "%s %d ", argv[0],listen_port);
/* port binding */
xsin.sin_family = AF_INET;
msock = bind_port(listen_port);
if(msock<0) {
syslog(LOG_INFO, "mbbsd bind_port failed.\n");
exit(1);
}
initsetproctitle(argc, argv, envp);
setproctitle("%s: listening ", margs);
/* Give up root privileges: no way back from here */
setgid(BBSGID);
setuid(BBSUID);
chdir(BBSHOME);
/* mmap passwd file */
if(passwd_mmap())
{
exit(1);
}
sprintf(buf, "run/mbbsd.%d.pid", listen_port);
if((fp = fopen(buf, "w"))) {
fprintf(fp, "%d\n", getpid());
fclose(fp);
}
/* main loop */
for(;;) {
len_of_sock_addr = sizeof(xsin);
csock = accept(msock, (struct sockaddr *)&xsin, (socklen_t *)&len_of_sock_addr);
if(csock < 0) {
if(errno!=EINTR) sleep(1);
continue;
}
if(check_ban_and_load(csock))
{
close(csock);
continue;
}
#ifdef NO_FORK
break;
#else
if(fork()==0)
break;
else
close(csock);
#endif
}
/* here is only child running */
setproctitle("%s: ...login wait... ", margs);
close(msock);
dup2(csock, 0);
close(csock);
getremotename(&xsin, fromhost, remoteusername);
telnet_init();
start_client();
close(0);
close(1);
}
/* check if we're banning login and if the load is too high.
if login is permitted, return 0;
else return -1;
approriate message is output to fd.
*/
static int check_ban_and_load(int fd)
{
FILE *fp;
static char buf[256];
static time_t chkload_time = 0;
static int overload = 0; /* overload or banned, update every 1 sec */
static int banned = 0;
if((time(0) - chkload_time) > 1) {
overload = chkload(buf);
banned = !access(BBSHOME "/BAN",R_OK) &&
(strcmp(fromhost, "localhost") != 0);
chkload_time = time(0);
}
write(fd, buf, strlen(buf));
if(banned && (fp = fopen(BBSHOME "/BAN", "r"))) {
while(fgets(buf, 256, fp))
write(fd, buf, strlen(buf));
fclose(fp);
}
if(banned || overload)
return -1;
#ifdef INSCREEN
write(fd, INSCREEN, strlen(INSCREEN));
#endif
return 0;
}
