From ae31e19f92e717919ac8e3db9039eb38d2b89aae Mon Sep 17 00:00:00 2001
From: in2 <in2@63ad8ddf-47c3-0310-b6dd-a9e9d9715204>
Date: Thu, 7 Mar 2002 15:13:44 +0000
Subject: Initial revision

git-svn-id: http://opensvn.csie.org/pttbbs/pttbbs/trunk/pttbbs@1 63ad8ddf-47c3-0310-b6dd-a9e9d9715204
---
 util/antispam.c | 122 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 122 insertions(+)
 create mode 100644 util/antispam.c

(limited to 'util/antispam.c')

diff --git a/util/antispam.c b/util/antispam.c
new file mode 100644
index 00000000..f7b77569
--- /dev/null
+++ b/util/antispam.c
@@ -0,0 +1,122 @@
+/* $Id: antispam.c,v 1.1 2002/03/07 15:13:45 in2 Exp $ */
+/* 抓廣告信的程式 */
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include "config.h"
+
+#define WINDOW 100		/* 一次window多少個server */
+#define LEVEL  21		/* 若幾次重復就算廣告信 */
+
+#define mailog BBSHOME "/etc/mailog"
+#define spamlog BBSHOME "/etc/spam"
+
+typedef struct sendinfo
+{
+    char time[18];
+    char from[50];
+    char userid[20];
+    int count;
+}
+sendinfo;
+
+int
+ main()
+{
+    char buf[200], *from, *userid;
+    int num = -1, numb = -1, n, nb;
+    FILE *fp = fopen(mailog, "r"), *fo;
+    sendinfo data[WINDOW];
+    sendinfo bad[WINDOW];
+
+    unlink(spamlog);
+    fo = fopen(spamlog, "a");
+    memset(data, 0, sizeof(data));
+    memset(bad, 0, sizeof(bad));
+
+    if (!fp || !fo)
+	return 0;
+
+    while (fgets(buf, 200, fp))
+    {
+	strtok(buf, "\r\n");
+	from = strchr(buf, '>') + 2;
+	userid = strstr(buf, " =>");
+
+	if (!from || !userid)
+	    continue;
+
+	*userid = 0;
+	userid += 4;
+
+	if (strstr(from, "MAILER-DAEMON")
+	    || strstr(from, userid))
+	    continue;		/* 退信通知不管 */
+    /* 是否已是badhost */
+
+	for (nb = 0; nb < WINDOW && bad[nb].from[0]; nb++)
+	    if (!strcmp(bad[nb].from, from))
+		break;
+
+	if (nb < WINDOW && bad[nb].from[0])
+	{
+	    bad[nb].count++;
+	    continue;
+	}
+
+    /* 簡查過去記錄 */
+
+	for (n = 0; n < WINDOW && data[n].from[0]; n++)
+	    if (!strcmp(data[n].from, from))
+		break;
+
+	if (n < WINDOW && data[n].from[0])
+	{
+	    if (!strncmp(data[n].userid, userid, 20))
+		continue;
+	/* 轉給同一個人就不管 */
+	    strncpy(data[n].userid, userid, 20);
+	    if (++data[n].count >= LEVEL)
+	    {
+	    /* 變成bad 移data到bad 空缺由後一筆資料補上 */
+		if (nb >= WINDOW)
+		{
+		    numb = (numb + 1) % WINDOW;
+		    nb = numb;
+		    fprintf(fo, "%s %s 重覆寄 %d 次\n",
+			    bad[nb].time, bad[nb].from, bad[nb].count);
+/*                                 printf(" %s send %d times\n",
+   bad[nb].from, bad[nb].count); */
+		}
+		memcpy(&bad[nb], &data[n], sizeof(sendinfo));
+		memcpy(&data[n], &data[n + 1], sizeof(sendinfo) * (WINDOW - n - 1));
+		if (num > n)
+		    num--;
+	    }
+	}
+	else
+	{
+	    if (n >= WINDOW)
+	    {
+		num = (num + 1) % WINDOW;
+		n = num;
+	    }
+/*                printf("[%s] to [%s]\n", from, userid); */
+	    buf[17] = 0;
+	    strncpy(data[n].time, buf, 17);
+	    strncpy(data[n].from, from, 50);
+	    strncpy(data[n].userid, userid, 20);
+	}
+    }
+
+    for (nb = 0; nb < WINDOW && bad[nb].from[0]; nb++)
+    {
+	fprintf(fo, "%s %s 重覆寄 %d 次\n", bad[nb].time,
+		bad[nb].from, bad[nb].count);
+/*         printf(" %s send %d times\n", bad[nb].from, bad[nb].count); */
+    }
+    fclose(fp);
+    fclose(fo);
+    return 0;
+}
-- 
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