merge from outtacache branch

git-svn-id: http://opensvn.csie.org/pttbbs/trunk/pttbbs@1689 63ad8ddf-47c3-0310-b6dd-a9e9d9715204

1 files changed, 143 insertions, 0 deletions

diff --git a/cacheserver/utmpserver.c b/cacheserver/utmpserver.c
new file mode 100644
index 00000000..60cd02ad
--- /dev/null
+++ b/cacheserver/utmpserver.c
@@ -0,0 +1,143 @@
+/* $Id$ */
+#include "bbs.h"
+#include <err.h>
+
+struct {
+    int     uid;
+    int     nFriends, nRejects;
+    int     friend[MAX_FRIEND];
+    int     reject[MAX_REJECT];
+} utmp[USHM_SIZE];
+
+inline int countarray(int *s, int max)
+{
+    int     i;
+    for( i = 0 ; i < max && s[i] ; ++i )
+	;
+    return i;
+}
+
+int
+reverse_friend_stat(int stat)
+{
+    int             stat1 = 0;
+    if (stat & IFH)
+        stat1 |= HFM;
+    if (stat & IRH)
+        stat1 |= HRM;
+    if (stat & HFM)
+        stat1 |= IFH;
+    if (stat & HRM)
+        stat1 |= IRH;
+    if (stat & IBH)
+        stat1 |= IBH;
+    return stat1;
+}
+
+int set_friend_bit(int me, int ui)
+{
+    int     hit = 0;
+    /* 判斷對方是否為我的朋友 ? */
+    if( intbsearch(utmp[ui].uid, utmp[me].friend, utmp[me].nFriends) )
+        hit = IFH;
+
+    /* 判斷我是否為對方的朋友 ? */
+    if( intbsearch(utmp[me].uid, utmp[ui].friend, utmp[ui].nFriends) )
+        hit |= HFM;
+
+    /* 判斷對方是否為我的仇人 ? */
+    if( intbsearch(utmp[ui].uid, utmp[me].reject, utmp[me].nRejects) )
+	hit |= IRH;
+
+    /* 判斷我是否為對方的仇人 ? */
+    if( intbsearch(utmp[me].uid, utmp[ui].reject, utmp[ui].nRejects) )
+	hit |= HRM;
+
+    return hit;
+}
+
+void initdata(int index)
+{
+    utmp[index].nFriends = countarray(utmp[index].friend, MAX_FRIEND);
+    utmp[index].nRejects = countarray(utmp[index].reject, MAX_REJECT);
+    if( utmp[index].nFriends > 0 )
+	qsort(utmp[index].friend, utmp[index].nFriends,
+	      sizeof(int), qsort_intcompar);
+    if( utmp[index].nRejects > 0 )
+	qsort(utmp[index].reject, utmp[index].nRejects,
+	      sizeof(int), qsort_intcompar);
+}
+
+int main(int argc, char **argv)
+{
+    struct  sockaddr_in     clientaddr;
+    int     ch, port = 5120, sfd, cfd, len, index, i, uid;
+
+    while( (ch = getopt(argc, argv, "p:h")) != -1 )
+	switch( ch ){
+	case 'p':
+	    port = atoi(optarg);
+	    break;
+
+	case 'h':
+	default:
+	    fprintf(stderr, "usage: utmpserver [-p port]\n");
+	    return 1;
+	}
+
+    if( (sfd = tobind(port)) < 0 )
+	return 1;
+
+    while( 1 ){
+	len = sizeof(clientaddr);
+	if( (cfd = accept(sfd, (struct sockaddr *)&clientaddr, &len)) < 0 ){
+	    if( errno != EINTR )
+		sleep(1);
+	    continue;
+	}
+	toread(cfd, &index, sizeof(index));
+	if( index == -1 ){
+	    int     nSynced = 0;
+	    for( i = 0 ; i < USHM_SIZE ; ++i, ++nSynced )
+		if( toread(cfd, &utmp[i].uid, sizeof(utmp[i].uid)) > 0      &&
+		    toread(cfd, utmp[i].friend, sizeof(utmp[i].friend)) > 0 &&
+		    toread(cfd, utmp[i].reject, sizeof(utmp[i].reject)) > 0 ){
+		    if( utmp[i].uid )
+			initdata(i);
+		}
+		else
+		    for( ; i < USHM_SIZE ; ++i )
+			utmp[i].uid = 0;
+	    close(cfd);
+	    fprintf(stderr, "%d users synced\n", nSynced);
+	    continue;
+	}
+
+	if( toread(cfd, &uid, sizeof(uid)) > 0                              &&
+	    toread(cfd, utmp[index].friend, sizeof(utmp[index].friend)) > 0 &&
+	    toread(cfd, utmp[index].reject, sizeof(utmp[index].reject)) > 0 ){
+#define MAX_FS   (2 * MAX_FRIEND)
+	    int     iu, nFrs, stat, rstat;
+	    ocfs_t  fs[MAX_FS];
+
+	    utmp[index].uid = uid;
+	    initdata(index);
+
+	    for( nFrs = iu = 0 ; iu < USHM_SIZE && nFrs < MAX_FS ; ++iu )
+		if( iu != index && utmp[iu].uid ){
+		    if( (stat = set_friend_bit(index, iu)) ){
+			rstat = reverse_friend_stat(stat);
+			fs[nFrs].index = iu;
+			fs[nFrs].uid = utmp[iu].uid;
+			fs[nFrs].friendstat = (stat << 24) + iu;
+			fs[nFrs].rfriendstat = (rstat << 24) + index;
+			++nFrs;
+		    }
+		}
+
+	    towrite(cfd, &fs, sizeof(ocfs_t) * nFrs);
+	}
+	close(cfd);
+    }
+    return 0;
+}