414 lines
8.5 KiB
C
414 lines
8.5 KiB
C
/* $NetBSD: sock.c,v 1.6 2004/03/28 09:00:56 martti Exp $ */
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/*
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* sock.c (C) 1995-1998 Darren Reed
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*
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* See the IPFILTER.LICENCE file for details on licencing.
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*
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*/
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#if !defined(lint)
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static const char sccsid[] = "@(#)sock.c 1.2 1/11/96 (C)1995 Darren Reed";
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static const char rcsid[] = "@(#)Id: sock.c,v 2.8.4.1 2004/03/23 12:58:06 darrenr Exp";
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#endif
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/stat.h>
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#ifndef ultrix
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#include <fcntl.h>
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#endif
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#if (__FreeBSD_version >= 300000)
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# include <sys/dirent.h>
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#else
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# include <sys/dir.h>
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#endif
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#if !defined(__osf__)
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# define _KERNEL
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# define KERNEL
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# ifdef ultrix
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# undef LOCORE
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# include <sys/smp_lock.h>
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# endif
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# include <sys/file.h>
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# undef _KERNEL
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# undef KERNEL
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#endif
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#include <nlist.h>
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#include <sys/user.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/proc.h>
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#if !defined(ultrix) && !defined(hpux) && !defined(__osf__)
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# include <kvm.h>
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#endif
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#ifdef sun
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#include <sys/systm.h>
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#include <sys/session.h>
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#endif
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#if BSD >= 199103
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#include <sys/sysctl.h>
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#include <sys/filedesc.h>
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#include <paths.h>
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#endif
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#include <math.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#include <netinet/tcp.h>
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#include <net/if.h>
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#if defined(__FreeBSD__)
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# include "radix_ipf.h"
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#endif
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#include <net/route.h>
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#include <netinet/ip_var.h>
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#include <netinet/in_pcb.h>
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#include <netinet/tcp_timer.h>
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#include <netinet/tcp_var.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stddef.h>
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#include <pwd.h>
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#include "ipsend.h"
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int nproc;
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struct proc *proc;
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#ifndef KMEM
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# ifdef _PATH_KMEM
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# define KMEM _PATH_KMEM
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# endif
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#endif
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#ifndef KERNEL
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# ifdef _PATH_UNIX
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# define KERNEL _PATH_UNIX
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# endif
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#endif
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#ifndef KMEM
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# define KMEM "/dev/kmem"
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#endif
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#ifndef KERNEL
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# define KERNEL "/vmunix"
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#endif
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#if BSD < 199103
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static struct proc *getproc __P((void));
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#else
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static struct kinfo_proc *getproc __P((void));
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#endif
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int kmemcpy(buf, pos, n)
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char *buf;
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void *pos;
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int n;
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{
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static int kfd = -1;
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off_t offset = (u_long)pos;
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if (kfd == -1)
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kfd = open(KMEM, O_RDONLY);
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if (lseek(kfd, offset, SEEK_SET) == -1)
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{
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perror("lseek");
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return -1;
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}
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if (read(kfd, buf, n) == -1)
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{
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perror("read");
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return -1;
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}
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return n;
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}
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struct nlist names[4] = {
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{ "_proc" },
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{ "_nproc" },
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#ifdef ultrix
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{ "_u" },
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#else
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{ NULL },
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#endif
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{ NULL }
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};
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#if BSD < 199103
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static struct proc *getproc()
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{
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struct proc *p;
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pid_t pid = getpid();
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int siz, n;
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n = nlist(KERNEL, names);
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if (n != 0)
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{
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fprintf(stderr, "nlist(%#x) == %d\n", names, n);
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return NULL;
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}
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if (KMCPY(&nproc, names[1].n_value, sizeof(nproc)) == -1)
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{
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fprintf(stderr, "read nproc (%#x)\n", names[1].n_value);
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return NULL;
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}
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siz = nproc * sizeof(struct proc);
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if (KMCPY(&p, names[0].n_value, sizeof(p)) == -1)
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{
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fprintf(stderr, "read(%#x,%#x,%d) proc\n",
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names[0].n_value, &p, sizeof(p));
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return NULL;
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}
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proc = (struct proc *)malloc(siz);
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if (KMCPY(proc, p, siz) == -1)
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{
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fprintf(stderr, "read(%#x,%#x,%d) proc\n",
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p, proc, siz);
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return NULL;
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}
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p = proc;
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for (n = nproc; n; n--, p++)
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if (p->p_pid == pid)
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break;
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if (!n)
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return NULL;
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return p;
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}
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struct tcpcb *find_tcp(fd, ti)
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int fd;
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struct tcpiphdr *ti;
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{
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struct tcpcb *t;
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struct inpcb *i;
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struct socket *s;
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struct user *up;
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struct proc *p;
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struct file *f, **o;
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if (!(p = getproc()))
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return NULL;
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up = (struct user *)malloc(sizeof(*up));
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#ifndef ultrix
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if (KMCPY(up, p->p_uarea, sizeof(*up)) == -1)
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{
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fprintf(stderr, "read(%#x,%#x) failed\n", p, p->p_uarea);
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return NULL;
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}
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#else
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if (KMCPY(up, names[2].n_value, sizeof(*up)) == -1)
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{
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fprintf(stderr, "read(%#x,%#x) failed\n", p, names[2].n_value);
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return NULL;
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}
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#endif
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o = (struct file **)calloc(1, sizeof(*o) * (up->u_lastfile + 1));
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if (KMCPY(o, up->u_ofile, (up->u_lastfile + 1) * sizeof(*o)) == -1)
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{
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fprintf(stderr, "read(%#x,%#x,%d) - u_ofile - failed\n",
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up->u_ofile, o, sizeof(*o));
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return NULL;
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}
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f = (struct file *)calloc(1, sizeof(*f));
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if (KMCPY(f, o[fd], sizeof(*f)) == -1)
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{
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fprintf(stderr, "read(%#x,%#x,%d) - o[fd] - failed\n",
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up->u_ofile[fd], f, sizeof(*f));
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return NULL;
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}
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s = (struct socket *)calloc(1, sizeof(*s));
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if (KMCPY(s, f->f_data, sizeof(*s)) == -1)
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{
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fprintf(stderr, "read(%#x,%#x,%d) - f_data - failed\n",
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o[fd], s, sizeof(*s));
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return NULL;
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}
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i = (struct inpcb *)calloc(1, sizeof(*i));
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if (KMCPY(i, s->so_pcb, sizeof(*i)) == -1)
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{
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fprintf(stderr, "kvm_read(%#x,%#x,%d) - so_pcb - failed\n",
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s->so_pcb, i, sizeof(*i));
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return NULL;
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}
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t = (struct tcpcb *)calloc(1, sizeof(*t));
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if (KMCPY(t, i->inp_ppcb, sizeof(*t)) == -1)
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{
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fprintf(stderr, "read(%#x,%#x,%d) - inp_ppcb - failed\n",
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i->inp_ppcb, t, sizeof(*t));
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return NULL;
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}
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return (struct tcpcb *)i->inp_ppcb;
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}
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#else
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static struct kinfo_proc *getproc()
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{
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static struct kinfo_proc kp;
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pid_t pid = getpid();
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int mib[4];
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size_t n;
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mib[0] = CTL_KERN;
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mib[1] = KERN_PROC;
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mib[2] = KERN_PROC_PID;
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mib[3] = pid;
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n = sizeof(kp);
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if (sysctl(mib, 4, &kp, &n, NULL, 0) == -1)
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{
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perror("sysctl");
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return NULL;
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}
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return &kp;
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}
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struct tcpcb *find_tcp(tfd, ti)
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int tfd;
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struct tcpiphdr *ti;
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{
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struct tcpcb *t;
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struct inpcb *i;
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struct socket *s;
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struct filedesc *fd;
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struct kinfo_proc *p;
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struct file *f, **o;
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if (!(p = getproc()))
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return NULL;
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fd = (struct filedesc *)malloc(sizeof(*fd));
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#if defined( __FreeBSD_version) && __FreeBSD_version >= 500013
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if (KMCPY(fd, p->ki_fd, sizeof(*fd)) == -1)
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{
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fprintf(stderr, "read(%#lx,%#lx) failed\n",
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(u_long)p, (u_long)p->ki_fd);
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return NULL;
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}
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#else
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if (KMCPY(fd, p->kp_proc.p_fd, sizeof(*fd)) == -1)
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{
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fprintf(stderr, "read(%#lx,%#lx) failed\n",
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(u_long)p, (u_long)p->kp_proc.p_fd);
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return NULL;
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}
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#endif
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o = (struct file **)calloc(1, sizeof(*o) * (fd->fd_lastfile + 1));
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if (KMCPY(o, fd->fd_ofiles, (fd->fd_lastfile + 1) * sizeof(*o)) == -1)
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{
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fprintf(stderr, "read(%#lx,%#lx,%lu) - u_ofile - failed\n",
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(u_long)fd->fd_ofiles, (u_long)o, (u_long)sizeof(*o));
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return NULL;
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}
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f = (struct file *)calloc(1, sizeof(*f));
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if (KMCPY(f, o[tfd], sizeof(*f)) == -1)
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{
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fprintf(stderr, "read(%#lx,%#lx,%lu) - o[tfd] - failed\n",
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(u_long)o[tfd], (u_long)f, (u_long)sizeof(*f));
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return NULL;
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}
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s = (struct socket *)calloc(1, sizeof(*s));
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if (KMCPY(s, f->f_data, sizeof(*s)) == -1)
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{
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fprintf(stderr, "read(%#lx,%#lx,%lu) - f_data - failed\n",
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(u_long)f->f_data, (u_long)s, (u_long)sizeof(*s));
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return NULL;
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}
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i = (struct inpcb *)calloc(1, sizeof(*i));
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if (KMCPY(i, s->so_pcb, sizeof(*i)) == -1)
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{
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fprintf(stderr, "kvm_read(%#lx,%#lx,%lu) - so_pcb - failed\n",
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(u_long)s->so_pcb, (u_long)i, (u_long)sizeof(*i));
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return NULL;
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}
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t = (struct tcpcb *)calloc(1, sizeof(*t));
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if (KMCPY(t, i->inp_ppcb, sizeof(*t)) == -1)
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{
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fprintf(stderr, "read(%#lx,%#lx,%lu) - inp_ppcb - failed\n",
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(u_long)i->inp_ppcb, (u_long)t, (u_long)sizeof(*t));
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return NULL;
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}
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return (struct tcpcb *)i->inp_ppcb;
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}
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#endif /* BSD < 199301 */
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int do_socket(dev, mtu, ti, gwip)
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char *dev;
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int mtu;
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struct tcpiphdr *ti;
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struct in_addr gwip;
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{
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struct sockaddr_in rsin, lsin;
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struct tcpcb *t, tcb;
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int fd, nfd, len;
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printf("Dest. Port: %d\n", ti->ti_dport);
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fd = socket(AF_INET, SOCK_STREAM, 0);
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if (fd == -1)
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{
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perror("socket");
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return -1;
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}
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if (fcntl(fd, F_SETFL, FNDELAY) == -1)
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{
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perror("fcntl");
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return -1;
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}
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bzero((char *)&lsin, sizeof(lsin));
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lsin.sin_family = AF_INET;
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bcopy((char *)&ti->ti_src, (char *)&lsin.sin_addr,
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sizeof(struct in_addr));
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if (bind(fd, (struct sockaddr *)&lsin, sizeof(lsin)) == -1)
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{
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perror("bind");
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return -1;
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}
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len = sizeof(lsin);
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(void) getsockname(fd, (struct sockaddr *)&lsin, &len);
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ti->ti_sport = lsin.sin_port;
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printf("sport %d\n", ntohs(lsin.sin_port));
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nfd = initdevice(dev, 1);
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if (!(t = find_tcp(fd, ti)))
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return -1;
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bzero((char *)&rsin, sizeof(rsin));
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rsin.sin_family = AF_INET;
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bcopy((char *)&ti->ti_dst, (char *)&rsin.sin_addr,
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sizeof(struct in_addr));
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rsin.sin_port = ti->ti_dport;
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if (connect(fd, (struct sockaddr *)&rsin, sizeof(rsin)) == -1 &&
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errno != EINPROGRESS)
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{
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perror("connect");
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return -1;
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}
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KMCPY(&tcb, t, sizeof(tcb));
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ti->ti_win = tcb.rcv_adv;
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ti->ti_seq = tcb.snd_nxt - 1;
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ti->ti_ack = tcb.rcv_nxt;
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if (send_tcp(nfd, mtu, (ip_t *)ti, gwip) == -1)
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return -1;
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(void)write(fd, "Hello World\n", 12);
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sleep(2);
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close(fd);
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return 0;
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}
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