1 files changed, 116 insertions, 0 deletions
diff --git a/ipsd/slinux.c b/ipsd/slinux.c
new file mode 100644
index 0000000..6372a60
--- /dev/null
+++ b/ipsd/slinux.c
@@ -0,0 +1,116 @@
+/*
+ * (C)opyright 1992-1998 Darren Reed. (from tcplog)
+ *
+ * See the IPFILTER.LICENCE file for details on licencing.
+ *
+ */
+
+#include <stdio.h>
+#include <netdb.h>
+#include <ctype.h>
+#include <signal.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/timeb.h>
+#include <sys/socket.h>
+#include <sys/file.h>
+#include <sys/ioctl.h>
+#include <sys/dir.h>
+#include <linux/netdevice.h>
+#include <net/if.h>
+#include <netinet/in.h>
+#include <netinet/ip.h>
+#include <netinet/tcp.h>
+#include "ip_compat.h"
+#include "tcpip.h"
+
+#ifndef	lint
+static const char sccsid[] = "@(#)slinux.c	1.1 12/3/95 (C) 1995 Darren Reed";
+#endif
+
+#define BUFSPACE	32768
+
+/*
+ * Be careful to only include those defined in the flags option for the
+ * interface are included in the header size.
+ */
+
+static	int	timeout;
+static	char	*eth_dev = NULL;
+
+
+int	ack_recv(bp)
+char	*bp;
+{
+	struct	tcpip	tip;
+	tcphdr_t	*tcp;
+	ip_t	*ip;
+
+	ip = (struct ip *)&tip;
+	tcp = (tcphdr_t *)(ip + 1);
+
+	bcopy(bp, (char *)&tip, sizeof(tip));
+	bcopy(bp + (ip.ip_hl << 2), (char *)tcp, sizeof(*tcp));
+	if (0 == detect(ip, tcp))
+		return 1;
+	return 0;
+}
+
+
+void	readloop(fd, port, dst)
+int 	fd, port;
+struct	in_addr dst;
+{
+	static	u_char	buf[BUFSPACE];
+	struct	sockaddr dest;
+	register u_char	*bp = buf;
+	register int	cc;
+	int	dlen, done = 0;
+	time_t	now = time(NULL);
+
+	do {
+		fflush(stdout);
+		dlen = sizeof(dest);
+		bzero((char *)&dest, dlen);
+		cc = recvfrom(fd, buf, BUFSPACE, 0, &dest, &dlen);
+		if (!cc)
+			if ((time(NULL) - now) > timeout)
+				return done;
+			else
+				continue;
+
+		if (bp[12] != 0x8 || bp[13] != 0)
+			continue;	/* not ip */
+
+		/*
+		 * get rid of non-tcp or fragmented packets here.
+		 */
+		if (cc >= sizeof(struct tcpiphdr))
+		    {
+			if (((bp[14+9] != IPPROTO_TCP) &&
+			     (bp[14+9] != IPPROTO_UDP)) ||
+			    (bp[14+6] & 0x1f) || (bp[14+6] & 0xff))
+				continue;
+			done += ack_recv(bp + 14);
+		    }
+	} while (cc >= 0);
+	perror("read");
+	exit(-1);
+}
+
+int	initdevice(dev, tout)
+char	*dev;
+int	tout;
+{
+	int fd;
+
+	eth_dev = strdup(dev);
+	if ((fd = socket(AF_INET, SOCK_PACKET, htons(ETHERTYPE_IP))) == -1)
+	    {
+		perror("socket(SOCK_PACKET)");
+		exit(-1);
+	    }
+
+	return fd;
+}