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#include <stdio.h>
#include <sys/time.h>
#include <sys/types.h>
#include <event.h>
#include "bbs.h"
extern void utmplogin(int uid, int index, const int like[MAX_FRIEND], const int hate[MAX_REJECT]);
extern int genfriendlist(int uid, int index, ocfs_t *fs, int maxfs);
extern void utmplogoutall(void);
#ifdef UTMPLOG
FILE *logfp;
#endif
clock_t begin_clock;
time_t begin_time;
int count_flooding, count_login;
#ifdef NOFLOODING
/* 0 ok, 1 delay action, 2 reject */
int action_frequently(int uid)
{
int i;
time_t now = time(NULL);
time_t minute = now/60;
time_t hour = minute/60;
static time_t flood_base_minute;
static time_t flood_base_hour;
static struct {
unsigned short lastlogin; // truncated time_t
unsigned char minute_count;
unsigned char hour_count;
} flooding[MAX_USERS];
if(minute!=flood_base_minute) {
for(i=0; i<MAX_USERS; i++)
flooding[i].minute_count=0;
flood_base_minute=minute;
}
if(hour!=flood_base_hour) {
for(i=0; i<MAX_USERS; i++)
flooding[i].hour_count=0;
flood_base_hour=hour;
}
if(abs(flooding[uid].lastlogin-(unsigned short)now)<=3 ||
flooding[uid].minute_count>30 ||
flooding[uid].hour_count>60) {
count_flooding++;
return 2;
}
flooding[uid].minute_count++;
flooding[uid].hour_count++;
flooding[uid].lastlogin=now;
if(flooding[uid].minute_count>5 ||
flooding[uid].hour_count>20) {
count_flooding++;
return 1;
}
return 0;
}
#endif /* NOFLOODING */
void syncutmp(int cfd) {
int i;
int like[MAX_FRIEND];
int hate[MAX_REJECT];
#ifdef UTMPLOG
int x=-1;
if(logfp && ftell(logfp)> 500*(1<<20)) {
fclose(logfp);
logfp=NULL;
}
if(logfp) fwrite(&x, sizeof(x), 1, logfp);
#endif
printf("logout all\n");
utmplogoutall();
fprintf(stderr,"sync begin\n");
for(i=0; i<USHM_SIZE; i++) {
int uid;
if( toread(cfd, &uid, sizeof(uid)) <= 0 ||
toread(cfd, like, sizeof(like)) <= 0 ||
toread(cfd, hate, sizeof(hate)) <= 0)
break;
#ifdef UTMPLOG
if(logfp) {
fwrite(&uid, sizeof(uid), 1, logfp);
fwrite(like, sizeof(like), 1, logfp);
fwrite(hate, sizeof(hate), 1, logfp);
}
#endif
if(uid != 0)
utmplogin(uid, i, like, hate);
}
if(i<USHM_SIZE) {
#ifdef UTMPLOG
int x=-2;
if(logfp) fwrite(&x, sizeof(x), 1, logfp);
#endif
}
fprintf(stderr,"sync end\n");
}
struct client_state {
struct event ev;
int state;
int next_block;
struct evbuffer *evb;
};
void processlogin(struct client_state *cs, int uid, int index)
{
int like[MAX_FRIEND];
int hate[MAX_REJECT];
/* logout 銝虫 utmpserver , 航賣亙唬鈭
撌脩 logout 撣唾隞乩賢芸 MAX_FRIEND 閬憭銝鈭 */
#define MAX_FS (2 * MAX_FRIEND)
int res;
int nfs;
ocfs_t fs[MAX_FS];
evbuffer_remove(cs->evb, like, sizeof(like));
evbuffer_remove(cs->evb, hate, sizeof(hate));
#ifdef UTMPLOG
if(logfp) {
int x=-3;
fwrite(&x, sizeof(x), 1, logfp);
fwrite(&uid, sizeof(uid), 1, logfp);
fwrite(&index, sizeof(index), 1, logfp);
fwrite(like, sizeof(like), 1, logfp);
fwrite(hate, sizeof(hate), 1, logfp);
}
#endif
utmplogin(uid, index, like, hate);
nfs=genfriendlist(uid, index, fs, MAX_FS);
res=0;
#ifdef NOFLOODING
res=action_frequently(uid);
#endif
evbuffer_drain(cs->evb, 2147483647);
evbuffer_add(cs->evb, &res, sizeof(res));
evbuffer_add(cs->evb, &nfs, sizeof(nfs));
evbuffer_add(cs->evb, fs, sizeof(ocfs_t) * nfs);
}
void showstat(void)
{
clock_t now_clock=clock();
time_t now_time=time(0);
time_t used_time=now_time-begin_time;
clock_t used_clock=now_clock-begin_clock;
printf("%.24s : real %.0f cpu %.2f : %d login %d flood, %.2f login/sec, %.2f%% load.\n",
ctime(&now_time), (double)used_time, (double)used_clock/CLOCKS_PER_SEC,
count_login, count_flooding,
(double)count_login/used_time, (double)used_clock/CLOCKS_PER_SEC/used_time*100);
begin_time=now_time;
begin_clock=now_clock;
count_login=0;
count_flooding=0;
}
enum {
FSM_ENTER,
FSM_LOGIN,
FSM_PROCESSLOGIN,
FSM_SYNC,
FSM_WRITEBACK,
FSM_EXIT
};
static int firstsync=0;
struct timeval tv = {5, 0};
struct event ev;
int clients = 0;
#define READ_BLOCK 1024
#define MAX_CLIENTS 10
void connection_client(int cfd, short event, void *arg)
{
struct client_state *cs = arg;
int cmd;
int uid = 0, index = 0;
// ignore clients that timeout
if (event & EV_TIMEOUT)
cs->state = FSM_EXIT;
if (event & EV_READ) {
if (cs->state != FSM_ENTER) {
if (evbuffer_read(cs->evb, cfd, READ_BLOCK) < 0)
cs->state = FSM_EXIT;
}
else {
if (evbuffer_read(cs->evb, cfd, 4) < 0)
cs->state = FSM_EXIT;
}
}
while (EVBUFFER_LENGTH(cs->evb) >= cs->next_block || cs->state >= FSM_SYNC) {
switch (cs->state) {
case FSM_ENTER:
evbuffer_remove(cs->evb, &cmd, sizeof(cmd));
if (cmd == -1)
cs->state = FSM_SYNC;
else if (cmd == -2) {
fcntl(cfd, F_SETFL, fcntl(cfd, F_GETFL, 0) | O_NONBLOCK);
cs->next_block = 2 * sizeof(int);
cs->state = FSM_LOGIN;
}
else if (cmd >= 0)
cs->state = FSM_EXIT;
else {
printf("unknown cmd=%d\n",cmd);
cs->state = FSM_EXIT;
}
break;
case FSM_SYNC:
syncutmp(cfd);
firstsync = 1;
cs->state = FSM_EXIT;
break;
case FSM_LOGIN:
if (firstsync) {
evbuffer_remove(cs->evb, &index, sizeof(index));
evbuffer_remove(cs->evb, &uid, sizeof(uid));
if (index < USHM_SIZE) {
cs->next_block = sizeof(int) * (MAX_FRIEND + MAX_REJECT);
cs->state = FSM_PROCESSLOGIN;
}
else {
fprintf(stderr, "bad index=%d\n", index);
cs->state = FSM_EXIT;
}
}
else
cs->state = FSM_EXIT;
break;
case FSM_PROCESSLOGIN:
count_login++;
processlogin(cs, uid, index);
if (count_login >= 4000 || (time(NULL) - begin_time) > 30*60)
showstat();
cs->state = FSM_WRITEBACK;
break;
case FSM_WRITEBACK:
if (event & EV_WRITE)
evbuffer_write(cs->evb, cfd);
if (EVBUFFER_LENGTH(cs->evb) == 0)
cs->state = FSM_EXIT;
break;
case FSM_EXIT:
if (clients == MAX_CLIENTS)
event_add(&ev, NULL);
close(cfd);
evbuffer_free(cs->evb);
free(cs);
clients--;
return;
break;
}
}
if (cs->state == FSM_WRITEBACK)
event_set(&cs->ev, cfd, EV_WRITE, (void *) connection_client, cs);
event_add(&cs->ev, &tv);
}
void connection_accept(int fd, short event, void *arg)
{
struct sockaddr_in clientaddr;
socklen_t len = sizeof(clientaddr);
int cfd;
if (clients > MAX_CLIENTS) {
event_del(&ev);
return;
}
if ((cfd = accept(fd, (struct sockaddr *)&clientaddr, &len)) < 0 )
return;
struct client_state *cs = calloc(1, sizeof(struct client_state));
cs->state = FSM_ENTER;
cs->next_block = sizeof(int);
cs->evb = evbuffer_new();
event_set(&cs->ev, cfd, EV_READ, (void *) connection_client, cs);
event_add(&cs->ev, &tv);
clients++;
}
int main(int argc, char *argv[])
{
int ch, port = 5120, sfd;
char *iface_ip = NULL;
#ifdef UTMPLOG
logfp = fopen("utmp.log","a");
if(logfp && ftell(logfp)> 500*(1<<20)) {
fclose(logfp);
logfp=NULL;
}
#endif
Signal(SIGPIPE, SIG_IGN);
while( (ch = getopt(argc, argv, "p:i:h")) != -1 )
switch( ch ){
case 'p':
port = atoi(optarg);
break;
case 'i':
iface_ip = optarg;
break;
case 'h':
default:
fprintf(stderr, "usage: utmpserver [-i interface_ip] [-p port]\n");
return 1;
}
if( (sfd = tobind(iface_ip, port)) < 0 )
return 1;
event_init();
event_set(&ev, sfd, EV_READ | EV_PERSIST, connection_accept, &ev);
event_add(&ev, NULL);
event_dispatch();
return 0;
}
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