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#include <stdio.h>
#include <sys/time.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 FAKEDATA
FILE *fp;
#endif
#ifdef UTMPLOG
FILE *logfp;
#endif
#ifdef NOFLOODING
#define MAXWAIT 1024
#define FLUSHTIME (3600*6)
struct {
time_t lasttime;
int count;
} flooding[MAX_USERS];
int nWaits, lastflushtime;
struct {
int uid;
int fd;
int index;
} waitqueue[MAXWAIT];
void flushwaitqueue(void)
{
int i;
for( i = 0 ; i < nWaits ; ++i ) {
processlogin(waitqueue[i].fd, waitqueue[i].uid, waitqueue[i].index);
close(waitqueue[i].fd);
}
lastflushtime = time(NULL);
nWaits = 0;
memset(flooding, 0, sizeof(flooding));
}
#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;
#ifdef FAKEDATA
fread(&uid, sizeof(uid), 1, fp);
if(uid==-2)
break;
fread(like, sizeof(like), 1, fp);
fread(hate, sizeof(hate), 1, fp);
#else
if( toread(cfd, &uid, sizeof(uid)) <= 0 ||
toread(cfd, like, sizeof(like)) <= 0 ||
toread(cfd, hate, sizeof(hate)) <= 0)
break;
#endif
#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");
}
void processlogin(int cfd, 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 nfs;
ocfs_t fs[MAX_FS];
#ifdef FAKEDATA
fread(like, sizeof(like), 1, fp);
fread(hate, sizeof(hate), 1, fp);
#else
if(toread(cfd, like, sizeof(like)) <= 0 ||
toread(cfd, hate, sizeof(hate)) <= 0)
return;
#endif
#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);
#ifndef FAKEDATA
towrite(cfd, fs, sizeof(ocfs_t) * nfs);
#endif
}
int main(int argc, char *argv[])
{
struct sockaddr_in clientaddr;
int ch, port = 5120, sfd, cfd, len;
char *iface_ip = NULL;
int cmd;
int uid,index;
int fail;
#ifdef UTMPLOG
logfp = fopen("utmp.log","a");
if(logfp && ftell(logfp)> 500*(1<<20)) {
fclose(logfp);
logfp=NULL;
}
#endif
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;
}
#ifdef FAKEDATA
fp=fopen("utmp.data","rb");
#else
if( (sfd = tobind(iface_ip, port)) < 0 )
return 1;
#endif
#ifdef NOFLOODING
lastflushtime = time(NULL);
#endif
while(1) {
#ifdef NOFLOODING
if( lastflushtime < (time(NULL) - 1800) )
flushwaitqueue();
#endif
#ifdef FAKEDATA
if(fread(&cmd, sizeof(cmd), 1, fp)==0) break;
#else
len = sizeof(clientaddr);
if( (cfd = accept(sfd, (struct sockaddr *)&clientaddr, &len)) < 0 ){
if( errno != EINTR )
sleep(1);
continue;
}
toread(cfd, &cmd, sizeof(cmd));
#endif
if(cmd==-1) {
syncutmp(cfd);
#ifndef FAKEDATA
close(cfd);
#endif
continue;
}
fail=0;
#ifdef FAKEDATA
fread(&uid, sizeof(uid), 1, fp);
fread(&index, sizeof(index), 1, fp);
#else
index=cmd; // bad protocol
if(toread(cfd, &uid, sizeof(uid)) <= 0)
fail=1;
#endif
if(index>=USHM_SIZE) {
fprintf(stderr, "bad index=%d\n",index);
fail=1;
}
if(fail) {
#ifndef FAKEDATA
close(cfd);
#endif
continue;
}
#ifdef NOFLOODING
if( (time(NULL) - flooding[uid].lasttime) < 20 )
++flooding[uid].count;
if( flooding[uid].count > 10 ){
if( nWaits == MAXWAIT )
flushwaitqueue();
waitqueue[nWaits].uid = uid;
waitqueue[nWaits].index = index;
waitqueue[nWaits].fd = cfd;
++nWaits;
continue;
}
flooding[uid].lasttime = time(NULL);
#endif
processlogin(cfd, uid, index);
#ifndef FAKEDATA
close(cfd);
#endif
}
#ifdef FAKEDATA
fclose(fp);
#endif
return 0;
}
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