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|
/* $FreeBSD$ */
/*
* sock.c (C) 1995-1998 Darren Reed
*
* See the IPFILTER.LICENCE file for details on licencing.
*
*/
#if !defined(lint)
static const char sccsid[] = "@(#)sock.c 1.2 1/11/96 (C)1995 Darren Reed";
static const char rcsid[] = "@(#)$Id$";
#endif
#include <sys/param.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/stat.h>
#if defined(__NetBSD__) && defined(__vax__)
/*
* XXX need to declare boolean_t for _KERNEL <sys/files.h>
* which ends up including <sys/device.h> for vax. See PR#32907
* for further details.
*/
typedef int boolean_t;
#endif
#include <fcntl.h>
# include <sys/dirent.h>
# ifdef __NetBSD__
# include <machine/lock.h>
# endif
# ifdef __FreeBSD__
# define _WANT_FILE
# else
# define _KERNEL
# define KERNEL
# endif
# include <sys/file.h>
# ifdef __FreeBSD__
# undef _WANT_FILE
# else
# undef _KERNEL
# undef KERNEL
# endif
#include <nlist.h>
#include <sys/user.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/proc.h>
# include <kvm.h>
#ifdef sun
#include <sys/systm.h>
#include <sys/session.h>
#endif
#include <sys/sysctl.h>
#include <sys/filedesc.h>
#include <paths.h>
#include <math.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>
#include <net/if.h>
# include <net/route.h>
#include <netinet/ip_var.h>
#define _WANT_INPCB
#include <netinet/in_pcb.h>
#include <netinet/tcp_timer.h>
#define _WANT_TCPCB
#include <netinet/tcp_var.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <stddef.h>
#include <pwd.h>
#include "ipsend.h"
int nproc;
struct proc *proc;
#ifndef KMEM
# ifdef _PATH_KMEM
# define KMEM _PATH_KMEM
# endif
#endif
#ifndef KERNEL
# ifdef _PATH_UNIX
# define KERNEL _PATH_UNIX
# endif
#endif
#ifndef KMEM
# define KMEM "/dev/kmem"
#endif
#ifndef KERNEL
# define KERNEL "/vmunix"
#endif
static struct kinfo_proc *getproc(void);
int kmemcpy(buf, pos, n)
char *buf;
void *pos;
int n;
{
static int kfd = -1;
off_t offset = (u_long)pos;
if (kfd == -1)
kfd = open(KMEM, O_RDONLY);
if (lseek(kfd, offset, SEEK_SET) == -1)
{
perror("lseek");
return -1;
}
if (read(kfd, buf, n) == -1)
{
perror("read");
return -1;
}
return n;
}
struct nlist names[4] = {
{ "_proc" },
{ "_nproc" },
{ NULL },
{ NULL }
};
static struct kinfo_proc *getproc()
{
static struct kinfo_proc kp;
pid_t pid = getpid();
int mib[4];
size_t n;
mib[0] = CTL_KERN;
mib[1] = KERN_PROC;
mib[2] = KERN_PROC_PID;
mib[3] = pid;
n = sizeof(kp);
if (sysctl(mib, 4, &kp, &n, NULL, 0) == -1)
{
perror("sysctl");
return NULL;
}
return &kp;
}
struct tcpcb *find_tcp(tfd, ti)
int tfd;
struct tcpiphdr *ti;
{
struct tcpcb *t;
struct inpcb *i;
struct socket *s;
struct filedesc *fd;
struct kinfo_proc *p;
struct file *f, **o;
if (!(p = getproc()))
return NULL;
fd = (struct filedesc *)malloc(sizeof(*fd));
if (fd == NULL)
return NULL;
#if defined( __FreeBSD_version)
if (KMCPY(fd, p->ki_fd, sizeof(*fd)) == -1)
{
fprintf(stderr, "read(%#lx,%#lx) failed\n",
(u_long)p, (u_long)p->ki_fd);
free(fd);
return NULL;
}
#else
if (KMCPY(fd, p->kp_proc.p_fd, sizeof(*fd)) == -1)
{
fprintf(stderr, "read(%#lx,%#lx) failed\n",
(u_long)p, (u_long)p->kp_proc.p_fd);
free(fd);
return NULL;
}
#endif
o = NULL;
f = NULL;
s = NULL;
i = NULL;
t = NULL;
o = (struct file **)calloc(fd->fd_lastfile + 1, sizeof(*o));
if (KMCPY(o, fd->fd_ofiles, (fd->fd_lastfile + 1) * sizeof(*o)) == -1)
{
fprintf(stderr, "read(%#lx,%#lx,%lu) - u_ofile - failed\n",
(u_long)fd->fd_ofiles, (u_long)o, (u_long)sizeof(*o));
goto finderror;
}
f = (struct file *)calloc(1, sizeof(*f));
if (KMCPY(f, o[tfd], sizeof(*f)) == -1)
{
fprintf(stderr, "read(%#lx,%#lx,%lu) - o[tfd] - failed\n",
(u_long)o[tfd], (u_long)f, (u_long)sizeof(*f));
goto finderror;
}
s = (struct socket *)calloc(1, sizeof(*s));
if (KMCPY(s, f->f_data, sizeof(*s)) == -1)
{
fprintf(stderr, "read(%#lx,%#lx,%lu) - f_data - failed\n",
(u_long)f->f_data, (u_long)s, (u_long)sizeof(*s));
goto finderror;
}
i = (struct inpcb *)calloc(1, sizeof(*i));
if (KMCPY(i, s->so_pcb, sizeof(*i)) == -1)
{
fprintf(stderr, "kvm_read(%#lx,%#lx,%lu) - so_pcb - failed\n",
(u_long)s->so_pcb, (u_long)i, (u_long)sizeof(*i));
goto finderror;
}
t = (struct tcpcb *)calloc(1, sizeof(*t));
if (KMCPY(t, i->inp_ppcb, sizeof(*t)) == -1)
{
fprintf(stderr, "read(%#lx,%#lx,%lu) - inp_ppcb - failed\n",
(u_long)i->inp_ppcb, (u_long)t, (u_long)sizeof(*t));
goto finderror;
}
return (struct tcpcb *)i->inp_ppcb;
finderror:
if (o != NULL)
free(o);
if (f != NULL)
free(f);
if (s != NULL)
free(s);
if (i != NULL)
free(i);
if (t != NULL)
free(t);
return NULL;
}
int do_socket(dev, mtu, ti, gwip)
char *dev;
int mtu;
struct tcpiphdr *ti;
struct in_addr gwip;
{
struct sockaddr_in rsin, lsin;
struct tcpcb *t, tcb;
int fd, nfd;
socklen_t 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, 1);
if (nfd == -1)
return -1;
if (!(t = 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;
}
KMCPY(&tcb, t, sizeof(tcb));
ti->ti_win = tcb.rcv_adv;
ti->ti_seq = tcb.snd_nxt - 1;
ti->ti_ack = tcb.rcv_nxt;
if (send_tcp(nfd, mtu, (ip_t *)ti, gwip) == -1)
return -1;
(void)write(fd, "Hello World\n", 12);
sleep(2);
close(fd);
return 0;
}
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