/* $Id$ */
#ifdef DEBUG
#define TELOPTS
#define TELCMDS
#endif
#include "bbs.h"
#include "banip.h"
#ifdef __linux__
# ifdef CRITICAL_MEMORY
# include <malloc.h>
# endif
# ifdef DEBUG
# include <mcheck.h>
# endif
#endif
#define SOCKET_QLEN 4
static void do_aloha(const char *hello);
static void getremotename(const struct sockaddr_in * from, char *rhost, char *rname);
#ifdef CONVERT
void big2gb_init(void*);
void gb2big_init(void*);
void big2uni_init(void*);
void uni2big_init(void*);
#endif
#if 0
static jmp_buf byebye;
#endif
static char remoteusername[40] = "?";
static unsigned char enter_uflag;
static int use_shell_login_mode = 0;
#ifdef DETECT_CLIENT
Fnv32_t client_code=FNV1_32_INIT;
#endif
#ifdef USE_RFORK
#define fork() rfork(RFFDG | RFPROC | RFNOWAIT)
#endif
/* 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(void)
{
int n, fd;
/*
* 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);
char buf[32];
strftime(buf, sizeof(buf), "%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!! */
#ifndef VALGRIND
n = getdtablesize();
while (n)
close(--n);
if( ((fd = open("log/stderr", O_WRONLY | O_CREAT | O_APPEND, 0644)) >= 0) && fd != 2 ){
dup2(fd, 2);
close(fd);
}
#endif
if(getenv("SSH_CLIENT"))
unsetenv("SSH_CLIENT");
/*
* 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);
}
void
log_usies(const char *mode, const char *mesg)
{
now = time(NULL);
if (!mesg)
log_file(FN_USIES, LOG_CREAT | LOG_VF,
"%s %s %-12s Stay:%d (%s)\n",
Cdate(&now), mode, cuser.userid ,
(int)(now - login_start_time) / 60, cuser.nickname);
else
log_file(FN_USIES, LOG_CREAT | LOG_VF,
"%s %s %-12s %s\n",
Cdate(&now), mode, cuser.userid, mesg);
/* �l�ܨϥΪ� */
if (HasUserPerm(PERM_LOGUSER))
log_user("logout");
}
static void
setflags(int mask, int value)
{
if (value)
cuser.uflag |= mask;
else
cuser.uflag &= ~mask;
}
void
u_exit(const char *mode)
{
int diff = (time(0) - login_start_time) / 60;
int dirty = currmode & MODE_DIRTY;
currmode = 0;
/* close fd 0 & 1 to terminate network */
close(0);
close(1);
assert(strncmp(currutmp->userid,cuser.userid, IDLEN)==0);
if(strncmp(currutmp->userid,cuser.userid, IDLEN)!=0)
return;
reload_money();
/*
cuser.goodpost = currutmp->goodpost;
cuser.badpost = currutmp->badpost;
cuser.goodsale = currutmp->goodsale;
cuser.badsale = currutmp->badsale;
*/
auto_backup();
setflags(PAGER_FLAG, currutmp->pager != PAGER_ON);
setflags(CLOAK_FLAG, currutmp->invisible);
save_brdbuf();
brc_finalize();
cuser.invisible = currutmp->invisible;
cuser.withme = currutmp->withme;
cuser.pager = currutmp->pager;
memcpy(cuser.mind, currutmp->mind, 4);
setutmpbid(0);
if (!SHM->GV2.e.shutdown) {
if (!(HasUserPerm(PERM_SYSOP) && HasUserPerm(PERM_SYSOPHIDE)) &&
!currutmp->invisible)
do_aloha("<<�U���q��>> -- �ڨ��o�I");
}
if ((cuser.uflag != enter_uflag) || dirty || diff) {
if (!diff && cuser.numlogins)
cuser.numlogins = --cuser.numlogins;
/* Leeym �W�����d�ɶ���� */
}
passwd_update(usernum, &cuser);
purge_utmp(currutmp);
log_usies(mode, NULL);
}
void
abort_bbs(int sig)
{
/* ignore normal signals */
Signal(SIGALRM, SIG_IGN);
Signal(SIGUSR1, SIG_IGN);
Signal(SIGUSR2, SIG_IGN);
Signal(SIGHUP, SIG_IGN);
Signal(SIGTERM, SIG_IGN);
Signal(SIGPIPE, SIG_IGN);
if (currmode)
u_exit("ABORTED");
exit(0);
}
#ifdef GCC_NORETURN
static void abort_bbs_debug(int sig) GCC_NORETURN;
#endif
/* NOTE: It's better to use signal-safe functions. Avoid to call
* functions with global/static variable -- data may be corrupted */
static void
abort_bbs_debug(int sig)
{
int i;
sigset_t sigset;
switch(sig) {
case SIGINT: STATINC(STAT_SIGINT); break;
case SIGQUIT: STATINC(STAT_SIGQUIT); break;
case SIGILL: STATINC(STAT_SIGILL); break;
case SIGABRT: STATINC(STAT_SIGABRT); break;
case SIGFPE: STATINC(STAT_SIGFPE); break;
case SIGBUS: STATINC(STAT_SIGBUS); break;
case SIGSEGV: STATINC(STAT_SIGSEGV); break;
case SIGXCPU: STATINC(STAT_SIGXCPU); break;
}
/* ignore normal signals */
Signal(SIGALRM, SIG_IGN);
Signal(SIGUSR1, SIG_IGN);
Signal(SIGUSR2, SIG_IGN);
Signal(SIGHUP, SIG_IGN);
Signal(SIGTERM, SIG_IGN);
Signal(SIGPIPE, SIG_IGN);
/* unblock */
sigemptyset(&sigset);
sigaddset(&sigset, SIGINT);
sigaddset(&sigset, SIGQUIT);
sigaddset(&sigset, SIGILL);
sigaddset(&sigset, SIGABRT);
sigaddset(&sigset, SIGFPE);
sigaddset(&sigset, SIGBUS);
sigaddset(&sigset, SIGSEGV);
sigaddset(&sigset, SIGXCPU);
sigprocmask(SIG_UNBLOCK, &sigset, NULL);
#define CRASH_MSG ANSI_COLOR(0) \
"\r\n�{�����`, �ߨ��_�u. \r\n" \
"�Ь� " GLOBAL_BUGREPORT " �O�ԭz���D�o�g�L�C\r\n"
#define XCPU_MSG ANSI_COLOR(0) \
"\r\n�{���ӥιL�h�p��귽, �ߨ��_�u�C\r\n" \
"�i��O (a)����Ӧh�ӥθ귽���ʧ@ �� (b)�{�����J�L�a�j��. "\
"�Ь� " GLOBAL_BUGREPORT " �O�ԭz���D�o�g�L�C\r\n"
if(sig==SIGXCPU)
write(1, XCPU_MSG, sizeof(XCPU_MSG));
else
write(1, CRASH_MSG, sizeof(CRASH_MSG));
/* close all file descriptors (including the network connection) */
for (i = 0; i < 256; ++i)
close(i);
/* log */
/* assume vsnprintf() in log_file() is signal-safe, is it? */
log_file("log/crash.log", LOG_VF|LOG_CREAT,
"%ld %d %d %.12s\n", time4(NULL), getpid(), sig, cuser.userid);
/* try logout... not a good idea, maybe crash again. now disabled */
/*
if (currmode) {
currmode = 0;
u_exit("AXXED");
}
*/
#ifdef DEBUGSLEEP
#ifndef VALGRIND
setproctitle("debug me!(%d)(%s,%d)", sig, cuser.userid, currstat);
#endif
/* do this manually to prevent broken stuff */
/* will broken currutmp cause problems here? hope not... */
if(currutmp && strncmp(cuser.userid, currutmp->userid, IDLEN) == EQUSTR)
currutmp->mode = DEBUGSLEEPING;
sleep(3600); /* wait 60 mins for debug */
#endif
exit(0);
}
/* �n�� BBS �{�� */
static void
mysrand(void)
{
srandom(time(NULL) + getpid()); /* �ɶ��� pid �� rand �� seed */
}
void
talk_request(int sig)
{
STATINC(STAT_TALKREQUEST);
bell();
bell();
if (currutmp->msgcount) {
char timebuf[100];
#ifdef OUTTA_TIMER
now = SHM->GV2.e.now;
#else
now = time(0);
#endif
move(0, 0);
clrtoeol();
prints(ANSI_COLOR(33;41) "��%s" ANSI_COLOR(34;47) " [%s] %s " ANSI_COLOR(0) "",
SHM->uinfo[currutmp->destuip].userid, my_ctime(&now,timebuf,sizeof(timebuf)),
(currutmp->sig == 2) ? "���n�����s���I(��Ctrl-U,l�d�ݼ��T�O��)"
: "�I�s�B�I�s�Ať��Ц^��");
refresh();
} else {
unsigned char mode0 = currutmp->mode;
char c0 = currutmp->chatid[0];
screen_backup_t old_screen;
currutmp->mode = 0;
currutmp->chatid[0] = 1;
screen_backup(&old_screen);
talkreply();
currutmp->mode = mode0;
currutmp->chatid[0] = c0;
screen_restore(&old_screen);
}
}
void
show_call_in(int save, int which)
{
char buf[200];
#ifdef PLAY_ANGEL
if (currutmp->msgs[which].msgmode == MSGMODE_TOANGEL)
snprintf(buf, sizeof(buf), ANSI_COLOR(1;37;46) "��%s" ANSI_COLOR(37;45) " %s " ANSI_RESET,
currutmp->msgs[which].userid, currutmp->msgs[which].last_call_in);
else
#endif
snprintf(buf, sizeof(buf), ANSI_COLOR(1;33;46) "��%s" ANSI_COLOR(37;45) " %s " ANSI_RESET,
currutmp->msgs[which].userid, currutmp->msgs[which].last_call_in);
outmsg(buf);
if (save) {
char genbuf[200];
if (!fp_writelog) {
sethomefile(genbuf, cuser.userid, fn_writelog);
fp_writelog = fopen(genbuf, "a");
}
if (fp_writelog) {
fprintf(fp_writelog, "%s [%s]\n", buf, Cdatelite(&now));
}
}
}
static int
add_history_water(water_t * w, const msgque_t * msg)
{
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(const msgque_t * msg)
{
int i = 0, j, waterinit = 0;
water_t *tmp;
check_water_init();
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
#ifdef PLAY_ANGEL
&& swater[i]->msg[0].msgmode == msg->msgmode
/* When throwing waterball to angel directly */
#endif
)
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, msgcount;
STATINC(STAT_WRITEREQUEST);
#ifdef NOKILLWATERBALL
if( reentrant_write_request ) /* kill again by shmctl */
return;
reentrant_write_request = 1;
#endif
#ifdef OUTTA_TIMER
now = SHM->GV2.e.now;
#else
now = time(0);
#endif
check_water_init();
if (WATERMODE(WATER_OFO)) {
/* �p�G�ثe���b�^���y�Ҧ�����, �N����i�� add_history() ,
�]���|��g water[], �ӨϦ^���y�ت��걼, �ҥH�����X�ر��p�Ҽ{.
sig != 0���u�������y�i��, �G���.
sig == 0���ܨS�����y�i��, ���L���e�|�����y�٨S�g�� water[].
*/
static int alreadyshow = 0;
if( sig ){ /* �u�������y�i�� */
/* �Y��ӥ��b REPLYING , �h�令 RECVINREPLYING,
�o�˦b�^���y������, �|�A�I�s�@�� write_request(0) */
if( wmofo == REPLYING )
wmofo = RECVINREPLYING;
/* ��� */
for( ; alreadyshow < currutmp->msgcount && alreadyshow < MAX_MSGS
; ++alreadyshow ){
bell();
show_call_in(1, alreadyshow);
refresh();
}
}
/* �ݬݬO���O�n�� currutmp->msg ���^ water[] (by add_history())
���n�O���b�^���y�� (NOTREPLYING) */
if( wmofo == NOTREPLYING &&
(msgcount = currutmp->msgcount) > 0 ){
for( i = 0 ; i < msgcount ; ++i )
add_history(&currutmp->msgs[i]);
if( (currutmp->msgcount -= msgcount) < 0 )
currutmp->msgcount = 0;
alreadyshow = 0;
}
} else {
if (currutmp->mode != 0 &&
currutmp->pager != PAGER_OFF &&
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 = HIT;
#ifdef NOKILLWATERBALL
currutmp->wbtime = 0;
#endif
if( (msgcount = currutmp->msgcount) > 0 ){
for( i = 0 ; i < msgcount ; ++i ){
bell();
show_call_in(1, 0);
add_history(&currutmp->msgs[0]);
if( (--currutmp->msgcount) < 0 )
i = msgcount; /* force to exit for() */
else if( currutmp->msgcount > 0 )
memmove(&currutmp->msgs[0],
&currutmp->msgs[1],
sizeof(msgque_t) * currutmp->msgcount);
igetch();
}
}
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;
}
}
#ifdef NOKILLWATERBALL
reentrant_write_request = 0;
currutmp->wbtime = 0; /* race */
#endif
}
static userinfo_t*
getotherlogin(int num)
{
userinfo_t *ui;
do {
if (!(ui = (userinfo_t *) search_ulistn(usernum, num)))
return NULL; /* user isn't logged in */
/* skip sleeping process, this is slow if lots */
if(ui->mode == DEBUGSLEEPING)
num++;
else if(ui->pid <= 0)
num++;
else if(kill(ui->pid, 0) < 0)
num++;
else
break;
} while (1);
return ui;
}
static void
multi_user_check(void)
{
register userinfo_t *ui;
char genbuf[3];
if (HasUserPerm(PERM_SYSOP))
return; /* don't check sysops */
srandom(getpid());
// race condition here, sleep may help..?
if (cuser.userlevel) {
usleep(random()%1000000); // 0~1s
ui = getotherlogin(1);
if(ui == NULL)
return;
getdata(b_lines - 1, 0, "�z�Q�R����L���ƪ� login (Y/N)�ܡH[Y] ",
genbuf, 3, LCECHO);
usleep(random()%1000000);
if (genbuf[0] != 'n') {
do {
// scan again, old ui may be invalid
ui = getotherlogin(1);
if(ui==NULL)
return;
if (ui->pid > 0) {
if(kill(ui->pid, SIGHUP)<0) {
perror("kill SIGHUP fail");
break;
}
log_usies("KICK ", cuser.nickname);
} else {
fprintf(stderr, "id=%s ui->pid=0\n", cuser.userid);
}
usleep(random()%2000000+1000000); // 1~3s
} while(getotherlogin(3) != NULL);
} else {
/* deny login if still have 3 */
if (getotherlogin(3) != NULL)
abort_bbs(0); /* Goodbye(); */
}
} else {
/* allow multiple guest user */
if (search_ulistn(usernum, MAX_GUEST) != NULL) {
vmsg("��p�A�ثe�w���Ӧh guest �b���W, �Х�new���U�C");
exit(1);
}
}
}
/* bad login */
static char * const str_badlogin = "logins.bad";
static void
logattempt(const char *uid, char type)
{
char fname[40];
int fd, len;
char genbuf[200];
snprintf(genbuf, sizeof(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 == '-') {
snprintf(genbuf, sizeof(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);
}
}
}
void mkuserdir(const char *userid)
{
char genbuf[200];
sethomepath(genbuf, userid);
// assume it is a dir, so just check if it is exist
if (access(genbuf, F_OK) != 0)
mkdir(genbuf, 0755);
}
static void
login_query(void)
{
#ifdef CONVERT
/* uid �[�@��, for gb login */
char uid[IDLEN + 2], passbuf[PASSLEN];
int attempts, len;
#else
char uid[IDLEN + 1], passbuf[PASSLEN];
int attempts;
#endif
resolve_garbage();
now = time(0);
#ifdef DEBUG
move(1, 0);
prints("debugging mode\ncurrent pid: %d\n", getpid());
#else
show_file("etc/Welcome", 1, -1, NO_RELOAD);
#endif
output("1", 1);
attempts = 0;
while (1) {
if (attempts++ >= LOGINATTEMPTS) {
more("etc/goodbye", NA);
pressanykey();
exit(1);
}
bzero(&cuser, sizeof(cuser));
#ifdef DEBUG
move(19, 0);
prints("current pid: %d ", getpid());
#endif
if (getdata(20, 0, "�п�J�N���A�ΥH[guest]���[�A�H[new]���U�G",
uid, sizeof(uid), DOECHO) < 1)
{
// got nothing
outs("���s��J�C\n");
continue;
}
#ifdef CONVERT
/* switch to gb mode if uid end with '.' */
len = strlen(uid);
if (uid[0] && uid[len - 1] == '.') {
set_converting_type(CONV_GB);
uid[len - 1] = 0;
}
else if (uid[0] && uid[len - 1] == ',') {
set_converting_type(CONV_UTF8);
uid[len - 1] = 0;
}
else if (len >= IDLEN + 1)
uid[IDLEN] = 0;
#endif
if (strcasecmp(uid, str_new) == 0) {
#ifdef LOGINASNEW
new_register();
mkuserdir(cuser.userid);
break;
#else
outs("���t�Υثe�L�k�H new ���U, �Х� guest �i�J\n");
continue;
#endif
} else if (!is_validuserid(uid)) {
outs(err_uid);
} else if (strcasecmp(uid, STR_GUEST) == 0) { /* guest */
if (initcuser(uid)< 1) exit (0) ;
cuser.userlevel = 0;
cuser.uflag = PAGER_FLAG | BRDSORT_FLAG | MOVIE_FLAG;
mkuserdir(cuser.userid);
break;
} else {
/* normal user */
getdata(21, 0, MSG_PASSWD,
passbuf, sizeof(passbuf), NOECHO);
passbuf[8] = '\0';
move (22, 0); clrtoeol();
outs("���b�ˬd�K�X...");
move(22, 0); refresh();
/* prepare for later */
clrtoeol();
if( initcuser(uid) < 1 || !cuser.userid[0] ||
!checkpasswd(cuser.passwd, passbuf) ){
if(is_validuserid(cuser.userid))
logattempt(cuser.userid , '-');
outs(ERR_PASSWD);
} else {
logattempt(cuser.userid, ' ');
outs("�K�X���T�I �}�l�n�J�t��...");
move(22, 0); refresh();
clrtoeol();
if (strcasecmp(str_sysop, cuser.userid) == 0){
#ifdef NO_SYSOP_ACCOUNT
exit(0);
#else /* �۰ʥ[�W�U�ӥD�n�v�� */
cuser.userlevel = PERM_BASIC | PERM_CHAT | PERM_PAGE |
PERM_POST | PERM_LOGINOK | PERM_MAILLIMIT |
PERM_CLOAK | PERM_SEECLOAK | PERM_XEMPT |
PERM_SYSOPHIDE | PERM_BM | PERM_ACCOUNTS |
PERM_CHATROOM | PERM_BOARD | PERM_SYSOP | PERM_BBSADM;
#endif
}
/* ���Ӧ� home �F, �����D�����b���|�S��, �Q�屼�F? */
mkuserdir(cuser.userid);
break;
}
}
}
multi_user_check();
#ifdef DETECT_CLIENT
{
int fd = open("log/client_code",O_WRONLY | O_CREAT | O_APPEND, 0644);
if(fd>=0) {
write(fd, &client_code, sizeof(client_code));
close(fd);
}
}
#endif
}
void
add_distinct(const char *fname, const char *line)
{
FILE *fp;
int n = 0;
if ((fp = fopen(fname, "a+"))) {
char buffer[80];
char tmpname[100];
FILE *fptmp;
strlcpy(tmpname, fname, sizeof(tmpname));
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);
rename(tmpname, fname);
}
}
void
del_distinct(const char *fname, const char *line, int casesensitive)
{
FILE *fp;
int n = 0;
if ((fp = fopen(fname, "r"))) {
char buffer[80];
char tmpname[100];
FILE *fptmp;
strlcpy(tmpname, fname, sizeof(tmpname));
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(casesensitive)
{
if (!strcmp(buffer, line))
break;
} else {
if (!strcasecmp(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);
rename(tmpname, fname);
}
}
#ifdef WHERE
static int
where(const char *from)
{
int i;
for (i = 0; i < SHM->home_num; i++) {
if ((SHM->home_ip[i] & SHM->home_mask[i]) == (ipstr2int(from) & SHM->home_mask[i])) {
return i;
}
}
return 0;
}
#endif
static void
check_BM(void)
{
/* XXX: -_- */
int i;
cuser.userlevel &= ~PERM_BM;
for( i = 0 ; i < numboards ; ++i )
if( is_BM_cache(i + 1) ) /* XXXbid */
return;
//for (i = 0, bhdr = bcache; i < numboards && !is_BM(bhdr->BM); i++, bhdr++);
}
static void
setup_utmp(int mode)
{
/* NOTE, �b getnewutmpent ���e�����Ӧ����� slow/blocking function */
userinfo_t uinfo;
memset(&uinfo, 0, sizeof(uinfo));
uinfo.pid = currpid = getpid();
uinfo.uid = usernum;
uinfo.mode = currstat = mode;
uinfo.userlevel = cuser.userlevel;
uinfo.sex = cuser.sex % 8;
uinfo.lastact = time(NULL);
strlcpy(uinfo.userid, cuser.userid, sizeof(uinfo.userid));
//strlcpy(uinfo.realname, cuser.realname, sizeof(uinfo.realname));
strlcpy(uinfo.nickname, cuser.nickname, sizeof(uinfo.nickname));
strip_nonebig5((unsigned char *)uinfo.nickname, sizeof(uinfo.nickname));
strlcpy(uinfo.from, fromhost, sizeof(uinfo.from));
uinfo.five_win = cuser.five_win;
uinfo.five_lose = cuser.five_lose;
uinfo.five_tie = cuser.five_tie;
uinfo.chc_win = cuser.chc_win;
uinfo.chc_lose = cuser.chc_lose;
uinfo.chc_tie = cuser.chc_tie;
uinfo.chess_elo_rating = cuser.chess_elo_rating;
uinfo.go_win = cuser.go_win;
uinfo.go_lose = cuser.go_lose;
uinfo.go_tie = cuser.go_tie;
uinfo.invisible = cuser.invisible % 2;
uinfo.pager = cuser.pager % PAGER_MODES;
/*
uinfo.goodpost = cuser.goodpost;
uinfo.badpost = cuser.badpost;
uinfo.goodsale = cuser.goodsale;
uinfo.badsale = cuser.badsale;
*/
if(cuser.withme & (cuser.withme<<1) & (WITHME_ALLFLAG<<1))
cuser.withme = 0; /* unset all if contradict */
uinfo.withme = cuser.withme & ~WITHME_ALLFLAG;
memcpy(uinfo.mind, cuser.mind, 4);
strip_nonebig5((unsigned char *)uinfo.mind, 4);
#ifdef WHERE
uinfo.from_alias = where(fromhost);
#endif
#ifndef FAST_LOGIN
setuserfile(buf, "remoteuser");
strlcpy(remotebuf, fromhost, sizeof(fromhost));
strcat(remotebuf, ctime4(&now));
chomp(remotebuf);
add_distinct(buf, remotebuf);
#endif
if (enter_uflag & CLOAK_FLAG)
uinfo.invisible = YEA;
#ifdef PLAY_ANGEL
if (REJECT_QUESTION)
uinfo.angel = 1;
uinfo.angel |= ANGEL_STATUS() << 1;
#endif
getnewutmpent(&uinfo);
currmode = MODE_STARTED;
SHM->UTMPneedsort = 1;
// XXX ���ΨC 20 �~�ˬd�a
if (!(cuser.numlogins % 20) && cuser.userlevel & PERM_BM)
check_BM(); /* Ptt �۰ʨ��U��¾�O�D�v�O */
#ifndef _BBS_UTIL_C_
/* Very, very slow friend_load. */
if( strcmp(cuser.userid, STR_GUEST) != 0 ) // guest ���B�z�n��
friend_load(0);
nice(3);
#endif
}
inline static void welcome_msg(void)
{
prints(ANSI_RESET " �w��z�� "
ANSI_COLOR(1;33) "%d" ANSI_COLOR(0;37) " ���X�����A�W���z�O�q "
ANSI_COLOR(1;33) "%s" ANSI_COLOR(0;37) " �s�������A"
ANSI_CLRTOEND "\n"
" �ڰO�o���ѬO " ANSI_COLOR(1;33) "%s" ANSI_COLOR(0;37) "�C"
ANSI_CLRTOEND "\n"
ANSI_CLRTOEND "\n"
,
++cuser.numlogins, cuser.lasthost, Cdate(&(cuser.lastlogin)));
pressanykey();
}
inline static void check_bad_login(void)
{
char genbuf[200];
setuserfile(genbuf, str_badlogin);
if (more(genbuf, NA) != -1) {
move(b_lines - 3, 0);
outs("�q�`�èS����k���D��ip�O�֩Ҧ�, "
"�H�Ψ�N��(�O���p�߫����Φ��N���z�K�X)\n"
"�Y�z���b���Q�s�κü{, �иg�`���z���K�X�ΨϥΥ[�K�s�u");
if (getans("�z�n�R���H�W���~���ժ��O����(Y/N)?[N]") == 'y')
unlink(genbuf);
}
}
inline static void birthday_make_a_wish(const struct tm *ptime, const struct tm *tmp)
{
if (tmp->tm_mday != ptime->tm_mday) {
more("etc/birth.post", YEA);
if (enter_board("WhoAmI")==0) {
do_post();
}
}
}
inline static void record_lasthost(const char *fromhost)
{
strlcpy(cuser.lasthost, fromhost, sizeof(cuser.lasthost));
}
inline static void check_mailbox_quota(void)
{
if (chkmailbox())
m_read();
}
static void init_guest_info(void)
{
int i;
char *nick[13] = {
"���l", "����", "����", "�_�S�~", "½����",
"��", "�B��", "�c�l", "�����", "�]��",
"�K��", "�Ҩ�", "�j���k"
};
char *name[13] = {
"�j�����l", "�x�M��", "���", "�i�f�i��", "���a����",
"��", "������", "AIR Jordon", "����Q�븹", "����",
"SASAYA����", "�n�J", "���|�J��������"
};
char *addr[13] = {
"�Ѱ�ֶ�", "�j��", "��q�p�]��", "����", "�������G",
"����", "�쥻��", "NIKE", "Ĭ�p", "�k�K618��",
"�R����", "�ѤW", "�Ŧ�����G"
};
i = login_start_time % 13;
snprintf(cuser.nickname, sizeof(cuser.nickname),
"����}�Ӫ�%s", nick[(int)i]);
strlcpy(currutmp->nickname, cuser.nickname,
sizeof(currutmp->nickname));
strlcpy(cuser.realname, name[(int)i], sizeof(cuser.realname));
strlcpy(cuser.address, addr[(int)i], sizeof(cuser.address));
cuser.sex = i % 8;
currutmp->pager = PAGER_DISABLE;
}
#if FOREIGN_REG_DAY > 0
inline static void foreign_warning(void){
if ((cuser.uflag2 & FOREIGN) && !(cuser.uflag2 & LIVERIGHT)){
if (login_start_time - cuser.firstlogin > (FOREIGN_REG_DAY - 5) * 24 * 3600){
mail_muser(cuser, "[�X�J�Һz��]", "etc/foreign_expired_warn");
}
else if (login_start_time - cuser.firstlogin > FOREIGN_REG_DAY * 24 * 3600){
cuser.userlevel &= ~(PERM_LOGINOK | PERM_POST);
vmsg("ĵ�i�G�ЦܥX�J�Һz���ӽХä[�~�d");
}
}
}
#endif
static void
user_login(void)
{
struct tm ptime, lasttime;
int nowusers, ifbirth = 0, i;
/* NOTE! �b setup_utmp ���e, �����Ӧ����� blocking/slow function,
* �_�h�i�Ǿ� race condition �F�� multi-login */
/* get local time */
ptime = *localtime4(&now);
/* ��l��: random number �W�[user��ɶ����t�� */
mysrand();
/* check if over18 */
if( (ptime.tm_year - cuser.year) >= 18 ||
(ptime.tm_year - cuser.year == 17 &&
((ptime.tm_mon+1) > cuser.month ||
((ptime.tm_mon+1) == cuser.month && ptime.tm_mday > cuser.day))) )
over18 = 1;
log_usies("ENTER", fromhost);
#ifndef VALGRIND
setproctitle("%s: %s", margs, cuser.userid);
#endif
resolve_fcache();
/* resolve_boards(); */
numboards = SHM->Bnumber;
if(getenv("SSH_CLIENT") != NULL){
struct sockaddr_in xsin;
char frombuf[50];
sscanf(getenv("SSH_CLIENT"), "%s", frombuf);
xsin.sin_family = AF_INET;
xsin.sin_port = htons(23);
if (strrchr(frombuf, ':'))
inet_pton(AF_INET, strrchr(frombuf, ':') + 1, &xsin.sin_addr);
else
inet_pton(AF_INET, frombuf, &xsin.sin_addr);
getremotename(&xsin, fromhost, remoteusername); /* RFC931 */
}
/* ��l�� uinfo�Bflag�Bmode */
setup_utmp(LOGIN);
enter_uflag = cuser.uflag;
lasttime = *localtime4(&cuser.lastlogin);
/* show welcome_login */
if( (ifbirth = (ptime.tm_mday == cuser.day &&
ptime.tm_mon + 1 == cuser.month)) ){
char buf[PATHLEN];
snprintf(buf, sizeof(buf), "etc/Welcome_birth.%d", getHoroscope(cuser.month, cuser.day));
more(buf, NA);
}
else {
#ifndef MULTI_WELCOME_LOGIN
more("etc/Welcome_login", NA);
#else
if( SHM->GV2.e.nWelcomes ){
char buf[80];
snprintf(buf, sizeof(buf), "etc/Welcome_login.%d",
(int)login_start_time % SHM->GV2.e.nWelcomes);
more(buf, NA);
}
#endif
}
refresh();
currutmp->alerts |= load_mailalert(cuser.userid);
if ((nowusers = SHM->UTMPnumber) > SHM->max_user) {
SHM->max_user = nowusers;
SHM->max_time = now;
}
if (!(HasUserPerm(PERM_SYSOP) && HasUserPerm(PERM_SYSOPHIDE)) &&
!currutmp->invisible)
{
/* do_aloha is costly. do it later? */
do_aloha("<<�W���q��>> -- �ڨӰաI");
}
if (SHM->loginmsg.pid){
if(search_ulist_pid(SHM->loginmsg.pid))
getmessage(SHM->loginmsg);
else
SHM->loginmsg.pid=0;
}
if (cuser.userlevel) { /* not guest */
move(t_lines - 4, 0);
clrtobot();
welcome_msg();
if( ifbirth ){
birthday_make_a_wish(&ptime, &lasttime);
if( getans("�O�_�n��ܡu�جP�v��ϥΪ̦W��W�H(y/N)") == 'y' )
currutmp->birth = 1;
}
check_bad_login();
check_mailbox_quota();
check_register();
record_lasthost(fromhost);
restore_backup();
} else if (strcmp(cuser.userid, STR_GUEST) == 0) { /* guest */
init_guest_info();
#if 0 // def DBCSAWARE
u_detectDBCSAwareEvilClient();
#else
pressanykey();
#endif
} else {
pressanykey();
check_mailbox_quota();
}
if(ptime.tm_yday!=lasttime.tm_yday)
STATINC(STAT_TODAYLOGIN_MAX);
if (!PERM_HIDE(currutmp)) {
/* If you wanna do incremental upgrade
* (like, added a function/flag that wants user to confirm againe)
* put it here.
*/
#if defined(DBCSAWARE) && defined(DBCSAWARE_UPGRADE_STARTTIME)
// define the real time you upgraded in your pttbbs.conf
if(cuser.lastlogin < DBCSAWARE_UPGRADE_STARTTIME)
{
if (u_detectDBCSAwareEvilClient())
cuser.uflag &= ~DBCSAWARE_FLAG;
else
cuser.uflag |= DBCSAWARE_FLAG;
}
#endif
/* login time update */
if(ptime.tm_yday!=lasttime.tm_yday)
STATINC(STAT_TODAYLOGIN_MIN);
cuser.lastlogin = login_start_time;
}
#if FOREIGN_REG_DAY > 0
foreign_warning();
#endif
passwd_update(usernum, &cuser);
if(cuser.uflag2 & FAVNEW_FLAG) {
fav_load();
if (get_fav_root() != NULL) {
int num;
num = updatenewfav(1);
if (num > NEW_FAV_THRESHOLD &&
getans("��� %d �ӷs�ݪO�A�T�w�n�[�J�ڪ��̷R�ܡH[Y/n]", num) == 'n') {
fav_free();
fav_load();
}
}
}
for (i = 0; i < NUMVIEWFILE; i++)
if ((cuser.loginview >> i) & 1)
more(loginview_file[(int)i][0], YEA);
}
static void
do_aloha(const char *hello)
{
FILE *fp;
char userid[80];
char genbuf[200];
setuserfile(genbuf, "aloha");
if ((fp = fopen(genbuf, "r"))) {
while (fgets(userid, 80, fp)) {
userinfo_t *uentp;
if ((uentp = (userinfo_t *) search_ulist_userid(userid)) &&
isvisible(uentp, currutmp)) {
my_write(uentp->pid, hello, uentp->userid, WATERBALL_ALOHA, uentp);
}
}
fclose(fp);
}
}
static void
do_term_init(void)
{
term_init();
initscr();
if(use_shell_login_mode)
raise(SIGWINCH);
}
inline static void
start_client(void)
{
#ifdef CPULIMIT
struct rlimit rml;
rml.rlim_cur = CPULIMIT * 60 - 5;
rml.rlim_max = CPULIMIT * 60;
setrlimit(RLIMIT_CPU, &rml);
#endif
STATINC(STAT_LOGIN);
/* 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(SIGXCPU, 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 �[�Wlogin time out */
m_init(); /* init the user mail path */
user_login();
auto_close_polls(); /* �۰ʶ}�� */
Signal(SIGALRM, SIG_IGN);
main_menu();
}
/* ���o remote user name �H�P�w���� */
/*
* 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 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(const 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;
strlcpy(rname, user, sizeof(user));
}
}
alarm(0);
}
fclose(fp);
#endif
}
static int
bind_port(int port)
{
int sock, on, sz;
struct linger lin;
struct sockaddr_in xsin;
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));
lin.l_onoff = 0;
setsockopt(sock, SOL_SOCKET, SO_LINGER, &lin, sizeof(lin));
sz = 1024;
setsockopt(sock, SOL_SOCKET, SO_RCVBUF, (void*)&sz, sizeof(sz));
sz = 4096;
setsockopt(sock, SOL_SOCKET, SO_SNDBUF, (void*)&sz, sizeof(sz));
xsin.sin_family = AF_INET;
xsin.sin_addr.s_addr = htonl(INADDR_ANY);
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 int shell_login(int argc, char *argv[], char *envp[]);
static int daemon_login(int argc, char *argv[], char *envp[]);
static int check_ban_and_load(int fd);
static int check_banip(char *host);
int
main(int argc, char *argv[], char *envp[])
{
start_time = time(NULL);
/* avoid SIGPIPE */
Signal(SIGPIPE, SIG_IGN);
/* avoid erroneous signal from other mbbsd */
Signal(SIGUSR1, SIG_IGN);
Signal(SIGUSR2, SIG_IGN);
#if defined(__GLIBC__) && defined(CRITICAL_MEMORY)
#define MY__MMAP_THRESHOLD (1024 * 8)
#define MY__MMAP_MAX (0)
#define MY__TRIM_THRESHOLD (1024 * 8)
#define MY__TOP_PAD (0)
mallopt (M_MMAP_THRESHOLD, MY__MMAP_THRESHOLD);
mallopt (M_MMAP_MAX, MY__MMAP_MAX);
mallopt (M_TRIM_THRESHOLD, MY__TRIM_THRESHOLD);
mallopt (M_TOP_PAD, MY__TOP_PAD);
#endif
attach_SHM();
if( (argc == 3 && shell_login(argc, argv, envp)) ||
(argc != 3 && daemon_login(argc, argv, envp)) )
start_client();
return 0;
}
static int
shell_login(int argc, char *argv[], char *envp[])
{
int fd;
STATINC(STAT_SHELLLOGIN);
/* Give up root privileges: no way back from here */
setgid(BBSGID);
setuid(BBSUID);
chdir(BBSHOME);
#if defined(linux) && defined(DEBUG)
// mtrace();
#endif
use_shell_login_mode = 1;
initsetproctitle(argc, argv, envp);
snprintf(margs, sizeof(margs), "%s ssh ", argv[0]);
/*
* copy fromindent: Standard input:1138: Error:Unexpected end of file the
* original "bbs"
*/
if (argc > 1) {
strcpy(fromhost, argv[1]);
if (argc > 3)
strlcpy(remoteusername, argv[3], sizeof(remoteusername));
}
close(2);
/* don't close fd 1, at least init_tty need it */
if( ((fd = open("log/stderr", O_WRONLY | O_CREAT | O_APPEND, 0644)) >= 0) && fd != 2 ){
dup2(fd, 2);
close(fd);
}
init_tty();
if (check_ban_and_load(0)) {
sleep(10);
return 0;
}
#ifdef DETECT_CLIENT
FNV1A_CHAR(123, client_code);
#endif
return 1;
}
void telnet_init(void);
unsigned int telnet_handler(unsigned char c) ;
static int
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, overloading = 0, i;
char buf[256];
#if OVERLOADBLOCKFDS
int blockfd[OVERLOADBLOCKFDS];
int nblocked = 0;
#endif
struct sockaddr_in xsin;
xsin.sin_family = AF_INET;
/* setup standalone */
start_daemon();
signal_restart(SIGCHLD, reapchild);
/* choose port */
if( argc < 2 )
listen_port = 3006;
else{
#ifdef NO_FORK
listen_port = atoi(argv[1]);
#else
for( i = 1 ; i < (argc - 1) ; ++i )
switch( fork() ){
case -1:
perror("fork()");
break;
case 0:
goto out;
default:
break;
}
out:
listen_port = atoi(argv[i]);
#endif
}
/* port binding */
if( (msock = bind_port(listen_port)) < 0 ){
syslog(LOG_INFO, "mbbsd bind_port failed.\n");
exit(1);
}
/* Give up root privileges: no way back from here */
setgid(BBSGID);
setuid(BBSUID);
chdir(BBSHOME);
/* proctitle */
initsetproctitle(argc, argv, envp);
#ifndef VALGRIND
snprintf(margs, sizeof(margs), "%s %d ", argv[0], listen_port);
setproctitle("%s: listening ", margs);
#endif
/* It's better to do something before fork */
#ifdef CONVERT
big2gb_init(NULL);
gb2big_init(NULL);
big2uni_init(NULL);
uni2big_init(NULL);
#endif
#ifndef NO_FORK
#ifdef PRE_FORK
if( listen_port == 23 ){ // only pre-fork in port 23
for( i = 0 ; i < PRE_FORK ; ++i )
if( fork() <= 0 )
break;
}
#endif
#endif
snprintf(buf, sizeof(buf),
"run/mbbsd.%d.%d.pid", listen_port, (int)getpid());
if ((fp = fopen(buf, "w"))) {
fprintf(fp, "%d\n", (int)getpid());
fclose(fp);
}
/* main loop */
while( 1 ){
len_of_sock_addr = sizeof(xsin);
if(
#if defined(Solaris) && __OS_MAJOR_VERSION__ == 5 && __OS_MINOR_VERSION__ < 7
(csock = accept(msock, (struct sockaddr *)&xsin,
&len_of_sock_addr)) < 0
#else
(csock = accept(msock, (struct sockaddr *)&xsin,
(socklen_t *)&len_of_sock_addr)) < 0
#endif
) {
if (errno != EINTR)
sleep(1);
continue;
}
overloading = check_ban_and_load(csock);
#if OVERLOADBLOCKFDS
if( (!overloading && nblocked) ||
(overloading && nblocked == OVERLOADBLOCKFDS) ){
for( i = 0 ; i < OVERLOADBLOCKFDS ; ++i )
if( blockfd[i] != csock && blockfd[i] != msock )
/* blockfd[i] should not be msock, but it happened */
close(blockfd[i]);
nblocked = 0;
}
#endif
if( overloading ){
#if OVERLOADBLOCKFDS
blockfd[nblocked++] = csock;
#else
close(csock);
#endif
continue;
}
#ifdef NO_FORK
break;
#else
if (fork() == 0)
break;
else
close(csock);
#endif
}
/* here is only child running */
#ifndef VALGRIND
setproctitle("%s: ...login wait... ", margs);
#endif
close(msock);
dup2(csock, 0);
close(csock);
getremotename(&xsin, fromhost, remoteusername);
if( check_banip(fromhost) ){
sleep(10);
exit(0);
}
telnet_init();
return 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 time4_t chkload_time = 0;
static int overload = 0; /* overload or banned, update every 1
* sec */
static int banned = 0;
#ifdef INSCREEN
write(fd, INSCREEN, sizeof(INSCREEN));
#else
#define BANNER \
"�i" BBSNAME "�j�� �x�j�y��� ��(" MYHOSTNAME ") �մT(" MYIP ") \r\n"
write(fd, BANNER, sizeof(BANNER));
#endif
if ((time(0) - chkload_time) > 1) {
overload = 0;
banned = 0;
if(cpuload(NULL) > MAX_CPULOAD)
overload = 1;
else if (SHM->UTMPnumber >= MAX_ACTIVE
#ifdef DYMAX_ACTIVE
|| (SHM->GV2.e.dymaxactive > 2000 &&
SHM->UTMPnumber >= SHM->GV2.e.dymaxactive)
#endif
) {
++SHM->GV2.e.toomanyusers;
overload = 2;
} else if(!access(BBSHOME "/" BAN_FILE, R_OK))
banned = 1;
chkload_time = time(0);
}
if(overload == 1)
write(fd, "�t�ιL��, �еy��A��\r\n", 22);
else if(overload == 2)
write(fd, "�ѩ�H�ƹL�h�A�бz�y��A�ӡC", 28);
else if (banned && (fp = fopen(BBSHOME "/" BAN_FILE, "r"))) {
char buf[256];
while (fgets(buf, sizeof(buf), fp))
write(fd, buf, strlen(buf));
fclose(fp);
}
if (banned || overload)
return -1;
return 0;
}
static int check_banip(char *host)
{
unsigned int thisip = 0;
char *ptr, *myhost = strdup(host);
char *strtok_pos;
for( ptr = strtok_r(myhost, ".", &strtok_pos) ; ptr != NULL ; ptr = strtok_r(NULL, ".", &strtok_pos) )
thisip = thisip * 256 + atoi(ptr);
free(myhost);
return uintbsearch(thisip, &banip[1], banip[0]) ? 1 : 0;
}
/* ------- piaip's implementation of TELNET protocol ------- */
enum TELNET_IAC_STATES {
IAC_NONE,
IAC_COMMAND,
IAC_WAIT_OPT,
IAC_WAIT_SE,
IAC_PROCESS_OPT,
IAC_ERROR
};
static unsigned char iac_state = 0; /* as byte to reduce memory */
#define TELNET_IAC_MAXLEN (16)
/* We don't reply to most commands, so this maxlen can be minimal.
* Warning: if you want to support ENV passing or other long commands,
* remember to increase this value. Howver, some poorly implemented
* terminals like xxMan may not follow the protocols and user will hang
* on those terminals when IACs were sent.
*/
void
telnet_init(void)
{
/* We are the boss. We don't respect to client.
* It's client's responsibility to follow us.
* Please write these codes in i-dont-care opt handlers.
*/
const char telnet_init_cmds[] = {
/* retrieve terminal type and throw away.
* why? because without this, clients enter line mode.
*/
IAC, DO, TELOPT_TTYPE,
IAC, SB, TELOPT_TTYPE, TELQUAL_SEND, IAC, SE,
/* i'm a smart term with resize ability. */
IAC, DO, TELOPT_NAWS,
/* i will echo. */
IAC, WILL, TELOPT_ECHO,
/* supress ga. */
IAC, WILL, TELOPT_SGA,
/* 8 bit binary. */
IAC, WILL, TELOPT_BINARY,
IAC, DO, TELOPT_BINARY,
};
raw_connection = 1;
write(0, telnet_init_cmds, sizeof(telnet_init_cmds));
}
/* tty_read
* read from tty, process telnet commands if raw connection.
* return: >0 = length, <=0 means read more, abort/eof is automatically processed.
*/
ssize_t
tty_read(unsigned char *buf, size_t max)
{
ssize_t l = read(0, buf, max);
if(l == 0 || (l < 0 && !(errno == EINTR || errno == EAGAIN)))
abort_bbs(0);
if(!raw_connection)
return l;
/* process buffer */
if (l > 0) {
unsigned char *buf2 = buf;
size_t i = 0, i2 = 0;
/* prescan. because IAC is rare,
* this cost is worthy. */
if (iac_state == IAC_NONE && memchr(buf, IAC, l) == NULL)
return l;
/* we have to look into the buffer. */
for (i = 0; i < l; i++, buf++)
if(telnet_handler(*buf) == 0)
*(buf2++) = *buf;
else
i2 ++;
l = (i2 == l) ? -1L : l - i2;
}
return l;
}
/* input: raw character
* output: telnet command if c was handled, otherwise zero.
*/
unsigned int
telnet_handler(unsigned char c)
{
static unsigned char iac_quote = 0; /* as byte to reduce memory */
static unsigned char iac_opt_req = 0;
static unsigned char iac_buf[TELNET_IAC_MAXLEN];
static unsigned int iac_buflen = 0;
/* we have to quote all IACs. */
if(c == IAC && !iac_quote) {
iac_quote = 1;
return NOP;
}
#ifdef DETECT_CLIENT
/* hash client telnet sequences */
if(cuser.userid[0]==0) {
if(iac_state == IAC_WAIT_SE) {
// skip suboption
} else {
if(iac_quote)
FNV1A_CHAR(IAC, client_code);
FNV1A_CHAR(c, client_code);
}
}
#endif
/* a special case is the top level iac. otherwise, iac is just a quote. */
if (iac_quote) {
if(iac_state == IAC_NONE)
iac_state = IAC_COMMAND;
if(iac_state == IAC_WAIT_SE && c == SE)
iac_state = IAC_PROCESS_OPT;
iac_quote = 0;
}
/* now, let's process commands by state */
switch(iac_state) {
case IAC_NONE:
return 0;
case IAC_COMMAND:
#ifdef DEBUG
{
int cx = c; /* to make compiler happy */
write(0, "-", 1);
if(TELCMD_OK(cx))
write(0, TELCMD(c), strlen(TELCMD(c)));
write(0, " ", 1);
}
#endif
iac_state = IAC_NONE; /* by default we restore state. */
switch(c) {
case IAC:
return 0;
/* we don't want to process these. or maybe in future. */
case BREAK: /* break */
case ABORT: /* Abort process */
case SUSP: /* Suspend process */
case AO: /* abort output--but let prog finish */
case IP: /* interrupt process--permanently */
case EOR: /* end of record (transparent mode) */
case DM: /* data mark--for connect. cleaning */
case xEOF: /* End of file: EOF is already used... */
return NOP;
case NOP: /* nop */
return NOP;
/* we should process these, but maybe in future. */
case GA: /* you may reverse the line */
case EL: /* erase the current line */
case EC: /* erase the current character */
return NOP;
/* good */
case AYT: /* are you there */
{
const char *alive = "I'm still alive, loading: ";
char buf[STRLEN];
/* respond as fast as we can */
write(0, alive, strlen(alive));
cpuload(buf);
write(0, buf, strlen(buf));
write(0, "\r\n", 2);
}
return NOP;
case DONT: /* you are not to use option */
case DO: /* please, you use option */
case WONT: /* I won't use option */
case WILL: /* I will use option */
iac_opt_req = c;
iac_state = IAC_WAIT_OPT;
return NOP;
case SB: /* interpret as subnegotiation */
iac_state = IAC_WAIT_SE;
iac_buflen = 0;
return NOP;
case SE: /* end sub negotiation */
default:
return NOP;
}
return 1;
case IAC_WAIT_OPT:
#ifdef DEBUG
write(0, "-", 1);
if(TELOPT_OK(c))
write(0, TELOPT(c), strlen(TELOPT(c)));
write(0, " ", 1);
#endif
iac_state = IAC_NONE;
/*
* According to RFC, there're some tricky steps to prevent loop.
* However because we have a poor term which does not allow
* most abilities, let's be a strong boss here.
*
* Although my old imeplementation worked, it's even better to follow this:
* http://www.tcpipguide.com/free/t_TelnetOptionsandOptionNegotiation-3.htm
*/
switch(c) {
/* i-dont-care: i don't care about what client is.
* these should be clamed in init and
* client must follow me. */
case TELOPT_TTYPE: /* termtype or line. */
case TELOPT_NAWS: /* resize terminal */
case TELOPT_SGA: /* supress GA */
case TELOPT_ECHO: /* echo */
case TELOPT_BINARY: /* we are CJK. */
break;
/* i-dont-agree: i don't understand/agree these.
* according to RFC, saying NO stopped further
* requests so there'll not be endless loop. */
case TELOPT_RCP: /* prepare to reconnect */
default:
if (iac_opt_req == WILL || iac_opt_req == DO)
{
/* unknown option, reply with won't */
unsigned char cmd[3] = { IAC, DONT, 0 };
if(iac_opt_req == DO) cmd[1] = WONT;
cmd[2] = c;
write(0, cmd, sizeof(cmd));
}
break;
}
return 1;
case IAC_WAIT_SE:
iac_buf[iac_buflen++] = c;
/* no need to convert state because previous quoting will do. */
if(iac_buflen == TELNET_IAC_MAXLEN) {
/* may be broken protocol?
* whether finished or not, break for safety
* or user may be frozen.
*/
iac_state = IAC_NONE;
return 0;
}
return 1;
case IAC_PROCESS_OPT:
iac_state = IAC_NONE;
#ifdef DEBUG
write(0, "-", 1);
if(TELOPT_OK(iac_buf[0]))
write(0, TELOPT(iac_buf[0]), strlen(TELOPT(iac_buf[0])));
write(0, " ", 1);
#endif
switch(iac_buf[0]) {
/* resize terminal */
case TELOPT_NAWS:
{
int w = (iac_buf[1] << 8) + (iac_buf[2]);
int h = (iac_buf[3] << 8) + (iac_buf[4]);
term_resize(w, h);
#ifdef DETECT_CLIENT
if(cuser.userid[0]==0) {
FNV1A_CHAR(iac_buf[0], client_code);
if(w==80 && h==24)
FNV1A_CHAR(1, client_code);
else if(w==80)
FNV1A_CHAR(2, client_code);
else if(h==24)
FNV1A_CHAR(3, client_code);
else
FNV1A_CHAR(4, client_code);
FNV1A_CHAR(IAC, client_code);
FNV1A_CHAR(SE, client_code);
}
#endif
}
break;
default:
#ifdef DETECT_CLIENT
if(cuser.userid[0]==0) {
int i;
for(i=0;i<iac_buflen;i++)
FNV1A_CHAR(iac_buf[i], client_code);
FNV1A_CHAR(IAC, client_code);
FNV1A_CHAR(SE, client_code);
}
#endif
break;
}
return 1;
}
return 1; /* never reached */
}
/* vim: sw=4
*/