Import IP Filter v3.1.7 into FreeBSD tree

1 files changed, 261 insertions, 0 deletions

diff --git a/contrib/ipfilter/ipsend/lsock.c b/contrib/ipfilter/ipsend/lsock.c
new file mode 100644
index 0000000..89b6ab7
--- /dev/null
+++ b/contrib/ipfilter/ipsend/lsock.c
@@ -0,0 +1,261 @@
+/*
+ * lsock.c (C) 1995 Darren Reed
+ *
+ * The author provides this program as-is, with no gaurantee for its
+ * suitability for any specific purpose.  The author takes no responsibility
+ * for the misuse/abuse of this program and provides it for the sole purpose
+ * of testing packet filter policies.  This file maybe distributed freely
+ * providing it is not modified and that this notice remains in tact.
+ */
+#if !defined(lint) && defined(LIBC_SCCS)
+static	char	sccsid[] = "@(#)lsock.c	1.2 1/11/96 (C)1995 Darren Reed";
+#endif
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <pwd.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/param.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/dir.h>
+#define	__KERNEL__
+#if LINUX >= 0200
+# undef UINT_MAX
+# undef INT_MAX
+# undef ULONG_MAX
+# undef LONG_MAX
+# include <linux/notifier.h>
+#endif
+#include <linux/fs.h>
+#if LINUX >= 0200
+#include "linux/netdevice.h"
+#include "net/sock.h"
+#endif
+#undef	__KERNEL__
+#include <linux/sched.h>
+#include <linux/netdevice.h>
+#include <nlist.h>
+#include <sys/user.h>
+#include <sys/socket.h>
+#include <math.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <net/if.h>
+#if LINUX < 0103
+#include <net/inet/sock.h>
+#endif
+#include "ip_compat.h"
+#include "tcpip.h"
+
+int	nproc;
+struct	task_struct	*proc;
+
+#ifndef	KMEM
+# ifdef	_PATH_KMEM
+#  define	KMEM	_PATH_KMEM
+# endif
+#endif
+#ifndef	KMEM
+# define	KMEM	"/dev/kmem"
+#endif
+#ifndef	KERNEL
+# define	KERNEL	"/System.map"
+#endif
+
+int	kmemcpy(buf, pos, n)
+char	*buf;
+void	*pos;
+int	n;
+{
+	static	int	kfd = -1;
+
+	if (kfd == -1)
+		kfd = open(KMEM, O_RDONLY);
+
+	if (lseek(kfd, (off_t)pos, SEEK_SET) == -1)
+	    {
+		perror("lseek");
+		return -1;
+	    }
+	if (read(kfd, buf, n) == -1)
+	    {
+		perror("read");
+		return -1;
+	    }
+	return n;
+}
+
+struct	nlist	names[3] = {
+	{ "_task" },
+	{ "_nr_tasks" },
+	{ NULL }
+	};
+
+struct	task_struct	*getproc()
+{
+	struct	task_struct	*p, **pp;
+	void	*v;
+	pid_t	pid = getpid();
+	int	siz, n;
+
+	n = nlist(KERNEL, names);
+	if (n != 0)
+	    {
+		fprintf(stderr, "nlist(%#x) == %d\n", names, n);
+		return NULL;
+	    }
+	if (kmemcpy((char *)&nproc, (void *)names[1].n_value,
+		    sizeof(nproc)) == -1)
+	    {
+		fprintf(stderr, "read nproc (%#x)\n", names[1].n_value);
+		return NULL;
+	    }
+	siz = nproc * sizeof(struct task_struct *);
+	if (kmemcpy((char *)&v, (void *)names[0].n_value, sizeof(v)) == -1)
+	    {
+		fprintf(stderr, "read(%#x,%#x,%d) proc\n",
+			names[0].n_value, &v, sizeof(v));
+		return NULL;
+	    }
+	pp = (struct task_struct **)malloc(siz);
+	if (kmemcpy((char *)pp, (void *)v, siz) == -1)
+	    {
+		fprintf(stderr, "read(%#x,%#x,%d) proc\n",
+			v, pp, siz);
+		return NULL;
+	    }
+	proc = (struct task_struct *)malloc(siz);
+	for (n = 0; n < NR_TASKS; n++)
+	    {
+		if (kmemcpy((char *)(proc + n), (void *)pp[n],
+			    sizeof(*proc)) == -1)
+		    {
+			fprintf(stderr, "read(%#x,%#x,%d) proc\n",
+				pp[n], proc + n, sizeof(*proc));
+			return NULL;
+		    }
+	    }
+
+	p = proc;
+
+	for (n = NR_TASKS; n; n--, p++)
+		if (p->pid == pid)
+			break;
+	if (!n)
+		return NULL;
+
+	return p;
+}
+
+
+struct	sock	*find_tcp(fd, ti)
+int	fd;
+struct	tcpiphdr *ti;
+{
+	struct	sock	*s;
+	struct	inode	*i;
+	struct	files_struct	*fs;
+	struct	task_struct	*p;
+	struct	file	*f, **o;
+
+	if (!(p = getproc()))
+		return NULL;
+
+	fs = p->files;
+	o = (struct file **)calloc(1, sizeof(*o) * (fs->count + 1));
+	if (kmemcpy((char *)o, (void *)fs->fd,
+		    (fs->count + 1) * sizeof(*o)) == -1)
+	    {
+		fprintf(stderr, "read(%#x,%#x,%d) - fd - failed\n",
+			fs->fd, o, sizeof(*o));
+		return NULL;
+	    }
+	f = (struct file *)calloc(1, sizeof(*f));
+	if (kmemcpy((char *)f, (void *)o[fd], sizeof(*f)) == -1)
+	    {
+		fprintf(stderr, "read(%#x,%#x,%d) - o[fd] - failed\n",
+			o[fd], f, sizeof(*f));
+		return NULL;
+	    }
+
+	i = (struct inode *)calloc(1, sizeof(*i));
+	if (kmemcpy((char *)i, (void *)f->f_inode, sizeof(*i)) == -1)
+	    {
+		fprintf(stderr, "read(%#x,%#x,%d) - f_inode - failed\n",
+			f->f_inode, i, sizeof(*i));
+		return NULL;
+	    }
+	return i->u.socket_i.data;
+}
+
+int	do_socket(dev, mtu, ti, gwip, flags)
+char	*dev;
+int	mtu;
+struct	tcpiphdr *ti;
+struct	in_addr	gwip;
+int	flags;
+{
+	struct	sockaddr_in	rsin, lsin;
+	struct	sock	*s, sk;
+	int	fd, nfd, len;
+
+	printf("Dest. Port: %d\n", ti->ti_dport);
+
+	fd = socket(AF_INET, SOCK_STREAM, 0);
+	if (fd == -1)
+	    {
+		perror("socket");
+		return -1;
+	    }
+
+	if (fcntl(fd, F_SETFL, FNDELAY) == -1)
+	    {
+		perror("fcntl");
+		return -1;
+	    }
+
+	bzero((char *)&lsin, sizeof(lsin));
+	lsin.sin_family = AF_INET;
+	bcopy((char *)&ti->ti_src, (char *)&lsin.sin_addr,
+	      sizeof(struct in_addr));
+	if (bind(fd, (struct sockaddr *)&lsin, sizeof(lsin)) == -1)
+	    {
+		perror("bind");
+		return -1;
+	    }
+	len = sizeof(lsin);
+	(void) getsockname(fd, (struct sockaddr *)&lsin, &len);
+	ti->ti_sport = lsin.sin_port;
+	printf("sport %d\n", ntohs(lsin.sin_port));
+	nfd = initdevice(dev, ntohs(lsin.sin_port));
+
+	if (!(s = find_tcp(fd, ti)))
+		return -1;
+
+	bzero((char *)&rsin, sizeof(rsin));
+	rsin.sin_family = AF_INET;
+	bcopy((char *)&ti->ti_dst, (char *)&rsin.sin_addr,
+	      sizeof(struct in_addr));
+	rsin.sin_port = ti->ti_dport;
+	if (connect(fd, (struct sockaddr *)&rsin, sizeof(rsin)) == -1 &&
+	    errno != EINPROGRESS)
+	    {
+		perror("connect");
+		return -1;
+	    }
+	kmemcpy((char*)&sk, (void *)s, sizeof(sk));
+	ti->ti_win = sk.window;
+	ti->ti_seq = sk.sent_seq - 1;
+	ti->ti_ack = sk.rcv_ack_seq;
+
+	if (send_tcp(nfd, mtu, ti, gwip, TH_SYN) == -1)
+		return -1;
+	(void)write(fd, "Hello World\n", 12);
+	sleep(2);
+	close(fd);
+	return 0;
+}