157109Speter/* $FreeBSD$ */ 222514Sdarrenr/* 357109Speter * sock.c (C) 1995-1998 Darren Reed 422514Sdarrenr * 580490Sdarrenr * See the IPFILTER.LICENCE file for details on licencing. 6145519Sdarrenr * 722514Sdarrenr */ 8145519Sdarrenr#if !defined(lint) 9145519Sdarrenrstatic const char sccsid[] = "@(#)sock.c 1.2 1/11/96 (C)1995 Darren Reed"; 10255332Scystatic const char rcsid[] = "@(#)$Id$"; 1192691Sdarrenr#endif 12145519Sdarrenr#include <sys/param.h> 1322514Sdarrenr#include <sys/types.h> 1422514Sdarrenr#include <sys/time.h> 1522514Sdarrenr#include <sys/stat.h> 16161357Sguido#if defined(__NetBSD__) && defined(__vax__) 17161357Sguido/* 18161357Sguido * XXX need to declare boolean_t for _KERNEL <sys/files.h> 19161357Sguido * which ends up including <sys/device.h> for vax. See PR#32907 20161357Sguido * for further details. 21161357Sguido */ 22161357Sguidotypedef int boolean_t; 23161357Sguido#endif 2431183Speter#ifndef ultrix 2522514Sdarrenr#include <fcntl.h> 2631183Speter#endif 2757109Speter#if (__FreeBSD_version >= 300000) 2857109Speter# include <sys/dirent.h> 2957109Speter#else 3057109Speter# include <sys/dir.h> 3134752Speter#endif 32145519Sdarrenr#if !defined(__osf__) 33255332Scy# ifdef __NetBSD__ 34172776Sdarrenr# include <machine/lock.h> 35172776Sdarrenr# endif 36180761Sdes# ifdef __FreeBSD__ 37180761Sdes# define _WANT_FILE 38180761Sdes# else 39180761Sdes# define _KERNEL 40180761Sdes# define KERNEL 41180761Sdes# endif 42145519Sdarrenr# ifdef ultrix 43145519Sdarrenr# undef LOCORE 44145519Sdarrenr# include <sys/smp_lock.h> 45145519Sdarrenr# endif 46145519Sdarrenr# include <sys/file.h> 47180761Sdes# ifdef __FreeBSD__ 48180761Sdes# undef _WANT_FILE 49180761Sdes# else 50180761Sdes# undef _KERNEL 51180761Sdes# undef KERNEL 52180761Sdes# endif 5331183Speter#endif 5422514Sdarrenr#include <nlist.h> 5522514Sdarrenr#include <sys/user.h> 5622514Sdarrenr#include <sys/socket.h> 5722514Sdarrenr#include <sys/socketvar.h> 5822514Sdarrenr#include <sys/proc.h> 59145519Sdarrenr#if !defined(ultrix) && !defined(hpux) && !defined(__osf__) 6031183Speter# include <kvm.h> 6131183Speter#endif 6222514Sdarrenr#ifdef sun 6322514Sdarrenr#include <sys/systm.h> 6422514Sdarrenr#include <sys/session.h> 6522514Sdarrenr#endif 6622514Sdarrenr#if BSD >= 199103 6722514Sdarrenr#include <sys/sysctl.h> 6822514Sdarrenr#include <sys/filedesc.h> 6922514Sdarrenr#include <paths.h> 7022514Sdarrenr#endif 7122514Sdarrenr#include <math.h> 7222514Sdarrenr#include <netinet/in.h> 7322514Sdarrenr#include <netinet/in_systm.h> 7422514Sdarrenr#include <netinet/ip.h> 7522514Sdarrenr#include <netinet/tcp.h> 7622514Sdarrenr#include <net/if.h> 77170268Sdarrenr#ifndef __osf__ 78170268Sdarrenr# include <net/route.h> 79170268Sdarrenr#endif 8022514Sdarrenr#include <netinet/ip_var.h> 8122514Sdarrenr#include <netinet/in_pcb.h> 8222514Sdarrenr#include <netinet/tcp_timer.h> 8322514Sdarrenr#include <netinet/tcp_var.h> 84145519Sdarrenr#include <stdio.h> 85145519Sdarrenr#include <unistd.h> 86145519Sdarrenr#include <string.h> 87145519Sdarrenr#include <stdlib.h> 88145519Sdarrenr#include <stddef.h> 89145519Sdarrenr#include <pwd.h> 9024583Sdarrenr#include "ipsend.h" 9122514Sdarrenr 9280490Sdarrenr 9322514Sdarrenrint nproc; 9422514Sdarrenrstruct proc *proc; 9522514Sdarrenr 9622514Sdarrenr#ifndef KMEM 9722514Sdarrenr# ifdef _PATH_KMEM 9822514Sdarrenr# define KMEM _PATH_KMEM 9922514Sdarrenr# endif 10022514Sdarrenr#endif 10122514Sdarrenr#ifndef KERNEL 10222514Sdarrenr# ifdef _PATH_UNIX 10322514Sdarrenr# define KERNEL _PATH_UNIX 10422514Sdarrenr# endif 10522514Sdarrenr#endif 10622514Sdarrenr#ifndef KMEM 10722514Sdarrenr# define KMEM "/dev/kmem" 10822514Sdarrenr#endif 10922514Sdarrenr#ifndef KERNEL 11022514Sdarrenr# define KERNEL "/vmunix" 11122514Sdarrenr#endif 11222514Sdarrenr 11324583Sdarrenr 11424583Sdarrenr#if BSD < 199103 11524583Sdarrenrstatic struct proc *getproc __P((void)); 11624583Sdarrenr#else 11724583Sdarrenrstatic struct kinfo_proc *getproc __P((void)); 11824583Sdarrenr#endif 11924583Sdarrenr 12024583Sdarrenr 12122514Sdarrenrint kmemcpy(buf, pos, n) 122255332Scy char *buf; 123255332Scy void *pos; 124255332Scy int n; 12522514Sdarrenr{ 12622514Sdarrenr static int kfd = -1; 12731183Speter off_t offset = (u_long)pos; 12822514Sdarrenr 12922514Sdarrenr if (kfd == -1) 13022514Sdarrenr kfd = open(KMEM, O_RDONLY); 13122514Sdarrenr 13231183Speter if (lseek(kfd, offset, SEEK_SET) == -1) 13322514Sdarrenr { 13422514Sdarrenr perror("lseek"); 13522514Sdarrenr return -1; 13622514Sdarrenr } 13722514Sdarrenr if (read(kfd, buf, n) == -1) 13822514Sdarrenr { 13922514Sdarrenr perror("read"); 14022514Sdarrenr return -1; 14122514Sdarrenr } 14222514Sdarrenr return n; 14322514Sdarrenr} 14422514Sdarrenr 14531183Speterstruct nlist names[4] = { 14622514Sdarrenr { "_proc" }, 14722514Sdarrenr { "_nproc" }, 14831183Speter#ifdef ultrix 14931183Speter { "_u" }, 15031183Speter#else 15131183Speter { NULL }, 15231183Speter#endif 15322514Sdarrenr { NULL } 15422514Sdarrenr }; 15522514Sdarrenr 15622514Sdarrenr#if BSD < 199103 15724583Sdarrenrstatic struct proc *getproc() 15822514Sdarrenr{ 15922514Sdarrenr struct proc *p; 16022514Sdarrenr pid_t pid = getpid(); 16122514Sdarrenr int siz, n; 16222514Sdarrenr 16322514Sdarrenr n = nlist(KERNEL, names); 16422514Sdarrenr if (n != 0) 16522514Sdarrenr { 16622514Sdarrenr fprintf(stderr, "nlist(%#x) == %d\n", names, n); 16722514Sdarrenr return NULL; 16822514Sdarrenr } 16924583Sdarrenr if (KMCPY(&nproc, names[1].n_value, sizeof(nproc)) == -1) 17022514Sdarrenr { 17122514Sdarrenr fprintf(stderr, "read nproc (%#x)\n", names[1].n_value); 17222514Sdarrenr return NULL; 17322514Sdarrenr } 17422514Sdarrenr siz = nproc * sizeof(struct proc); 17524583Sdarrenr if (KMCPY(&p, names[0].n_value, sizeof(p)) == -1) 17622514Sdarrenr { 17722514Sdarrenr fprintf(stderr, "read(%#x,%#x,%d) proc\n", 17822514Sdarrenr names[0].n_value, &p, sizeof(p)); 17922514Sdarrenr return NULL; 18022514Sdarrenr } 18122514Sdarrenr proc = (struct proc *)malloc(siz); 18224583Sdarrenr if (KMCPY(proc, p, siz) == -1) 18322514Sdarrenr { 18422514Sdarrenr fprintf(stderr, "read(%#x,%#x,%d) proc\n", 18522514Sdarrenr p, proc, siz); 18622514Sdarrenr return NULL; 18722514Sdarrenr } 18822514Sdarrenr 18922514Sdarrenr p = proc; 19022514Sdarrenr 19122514Sdarrenr for (n = nproc; n; n--, p++) 19222514Sdarrenr if (p->p_pid == pid) 19322514Sdarrenr break; 19422514Sdarrenr if (!n) 19522514Sdarrenr return NULL; 19622514Sdarrenr 19722514Sdarrenr return p; 19822514Sdarrenr} 19922514Sdarrenr 20022514Sdarrenr 20122514Sdarrenrstruct tcpcb *find_tcp(fd, ti) 202255332Scy int fd; 203255332Scy struct tcpiphdr *ti; 20422514Sdarrenr{ 20522514Sdarrenr struct tcpcb *t; 20622514Sdarrenr struct inpcb *i; 20722514Sdarrenr struct socket *s; 20822514Sdarrenr struct user *up; 20922514Sdarrenr struct proc *p; 21022514Sdarrenr struct file *f, **o; 21122514Sdarrenr 21222514Sdarrenr if (!(p = getproc())) 21322514Sdarrenr return NULL; 21422514Sdarrenr up = (struct user *)malloc(sizeof(*up)); 21531183Speter#ifndef ultrix 21624583Sdarrenr if (KMCPY(up, p->p_uarea, sizeof(*up)) == -1) 21722514Sdarrenr { 21822514Sdarrenr fprintf(stderr, "read(%#x,%#x) failed\n", p, p->p_uarea); 21922514Sdarrenr return NULL; 22022514Sdarrenr } 22131183Speter#else 22231183Speter if (KMCPY(up, names[2].n_value, sizeof(*up)) == -1) 22331183Speter { 22431183Speter fprintf(stderr, "read(%#x,%#x) failed\n", p, names[2].n_value); 22531183Speter return NULL; 22631183Speter } 22731183Speter#endif 22822514Sdarrenr 22922514Sdarrenr o = (struct file **)calloc(1, sizeof(*o) * (up->u_lastfile + 1)); 23024583Sdarrenr if (KMCPY(o, up->u_ofile, (up->u_lastfile + 1) * sizeof(*o)) == -1) 23122514Sdarrenr { 23222514Sdarrenr fprintf(stderr, "read(%#x,%#x,%d) - u_ofile - failed\n", 23331183Speter up->u_ofile, o, sizeof(*o)); 23422514Sdarrenr return NULL; 23522514Sdarrenr } 23622514Sdarrenr f = (struct file *)calloc(1, sizeof(*f)); 23724583Sdarrenr if (KMCPY(f, o[fd], sizeof(*f)) == -1) 23822514Sdarrenr { 23922514Sdarrenr fprintf(stderr, "read(%#x,%#x,%d) - o[fd] - failed\n", 24031183Speter up->u_ofile[fd], f, sizeof(*f)); 24122514Sdarrenr return NULL; 24222514Sdarrenr } 24322514Sdarrenr 24422514Sdarrenr s = (struct socket *)calloc(1, sizeof(*s)); 245109153Sdillon if (KMCPY(s, f->f_data, sizeof(*s)) == -1) 24622514Sdarrenr { 24722514Sdarrenr fprintf(stderr, "read(%#x,%#x,%d) - f_data - failed\n", 24822514Sdarrenr o[fd], s, sizeof(*s)); 24922514Sdarrenr return NULL; 25022514Sdarrenr } 25122514Sdarrenr 25222514Sdarrenr i = (struct inpcb *)calloc(1, sizeof(*i)); 25324583Sdarrenr if (KMCPY(i, s->so_pcb, sizeof(*i)) == -1) 25422514Sdarrenr { 25522514Sdarrenr fprintf(stderr, "kvm_read(%#x,%#x,%d) - so_pcb - failed\n", 25622514Sdarrenr s->so_pcb, i, sizeof(*i)); 25722514Sdarrenr return NULL; 25822514Sdarrenr } 25922514Sdarrenr 26022514Sdarrenr t = (struct tcpcb *)calloc(1, sizeof(*t)); 26124583Sdarrenr if (KMCPY(t, i->inp_ppcb, sizeof(*t)) == -1) 26222514Sdarrenr { 26322514Sdarrenr fprintf(stderr, "read(%#x,%#x,%d) - inp_ppcb - failed\n", 26422514Sdarrenr i->inp_ppcb, t, sizeof(*t)); 26522514Sdarrenr return NULL; 26622514Sdarrenr } 26722514Sdarrenr return (struct tcpcb *)i->inp_ppcb; 26822514Sdarrenr} 26922514Sdarrenr#else 27024583Sdarrenrstatic struct kinfo_proc *getproc() 27122514Sdarrenr{ 27222514Sdarrenr static struct kinfo_proc kp; 27322514Sdarrenr pid_t pid = getpid(); 27431183Speter int mib[4]; 27531183Speter size_t n; 27622514Sdarrenr 27722514Sdarrenr mib[0] = CTL_KERN; 27822514Sdarrenr mib[1] = KERN_PROC; 27922514Sdarrenr mib[2] = KERN_PROC_PID; 28022514Sdarrenr mib[3] = pid; 28122514Sdarrenr 28234739Speter n = sizeof(kp); 28322514Sdarrenr if (sysctl(mib, 4, &kp, &n, NULL, 0) == -1) 28422514Sdarrenr { 28522514Sdarrenr perror("sysctl"); 28622514Sdarrenr return NULL; 28722514Sdarrenr } 28822514Sdarrenr return &kp; 28922514Sdarrenr} 29022514Sdarrenr 29122514Sdarrenr 29222514Sdarrenrstruct tcpcb *find_tcp(tfd, ti) 293255332Scy int tfd; 294255332Scy struct tcpiphdr *ti; 29522514Sdarrenr{ 29622514Sdarrenr struct tcpcb *t; 29722514Sdarrenr struct inpcb *i; 29822514Sdarrenr struct socket *s; 29922514Sdarrenr struct filedesc *fd; 30022514Sdarrenr struct kinfo_proc *p; 30122514Sdarrenr struct file *f, **o; 30222514Sdarrenr 30322514Sdarrenr if (!(p = getproc())) 30422514Sdarrenr return NULL; 30522514Sdarrenr 30622514Sdarrenr fd = (struct filedesc *)malloc(sizeof(*fd)); 307170268Sdarrenr if (fd == NULL) 308170268Sdarrenr return NULL; 30970033Salfred#if defined( __FreeBSD_version) && __FreeBSD_version >= 500013 31070033Salfred if (KMCPY(fd, p->ki_fd, sizeof(*fd)) == -1) 31170033Salfred { 31270033Salfred fprintf(stderr, "read(%#lx,%#lx) failed\n", 31370033Salfred (u_long)p, (u_long)p->ki_fd); 314170268Sdarrenr free(fd); 31570033Salfred return NULL; 31670033Salfred } 31770033Salfred#else 31824583Sdarrenr if (KMCPY(fd, p->kp_proc.p_fd, sizeof(*fd)) == -1) 31922514Sdarrenr { 32022514Sdarrenr fprintf(stderr, "read(%#lx,%#lx) failed\n", 32122514Sdarrenr (u_long)p, (u_long)p->kp_proc.p_fd); 322170268Sdarrenr free(fd); 32322514Sdarrenr return NULL; 32422514Sdarrenr } 32570033Salfred#endif 32622514Sdarrenr 327161357Sguido o = NULL; 328161357Sguido f = NULL; 329161357Sguido s = NULL; 330161357Sguido i = NULL; 331161357Sguido t = NULL; 332161357Sguido 33322514Sdarrenr o = (struct file **)calloc(1, sizeof(*o) * (fd->fd_lastfile + 1)); 33424583Sdarrenr if (KMCPY(o, fd->fd_ofiles, (fd->fd_lastfile + 1) * sizeof(*o)) == -1) 33522514Sdarrenr { 33631183Speter fprintf(stderr, "read(%#lx,%#lx,%lu) - u_ofile - failed\n", 33731183Speter (u_long)fd->fd_ofiles, (u_long)o, (u_long)sizeof(*o)); 338161357Sguido goto finderror; 33922514Sdarrenr } 34022514Sdarrenr f = (struct file *)calloc(1, sizeof(*f)); 34124583Sdarrenr if (KMCPY(f, o[tfd], sizeof(*f)) == -1) 34222514Sdarrenr { 34331183Speter fprintf(stderr, "read(%#lx,%#lx,%lu) - o[tfd] - failed\n", 34431183Speter (u_long)o[tfd], (u_long)f, (u_long)sizeof(*f)); 345161357Sguido goto finderror; 34622514Sdarrenr } 34722514Sdarrenr 34822514Sdarrenr s = (struct socket *)calloc(1, sizeof(*s)); 349109153Sdillon if (KMCPY(s, f->f_data, sizeof(*s)) == -1) 35022514Sdarrenr { 35131183Speter fprintf(stderr, "read(%#lx,%#lx,%lu) - f_data - failed\n", 352161357Sguido (u_long)f->f_data, (u_long)s, (u_long)sizeof(*s)); 353161357Sguido goto finderror; 35422514Sdarrenr } 35522514Sdarrenr 35622514Sdarrenr i = (struct inpcb *)calloc(1, sizeof(*i)); 35724583Sdarrenr if (KMCPY(i, s->so_pcb, sizeof(*i)) == -1) 35822514Sdarrenr { 35931183Speter fprintf(stderr, "kvm_read(%#lx,%#lx,%lu) - so_pcb - failed\n", 36031183Speter (u_long)s->so_pcb, (u_long)i, (u_long)sizeof(*i)); 361161357Sguido goto finderror; 36222514Sdarrenr } 36322514Sdarrenr 36422514Sdarrenr t = (struct tcpcb *)calloc(1, sizeof(*t)); 36524583Sdarrenr if (KMCPY(t, i->inp_ppcb, sizeof(*t)) == -1) 36622514Sdarrenr { 36731183Speter fprintf(stderr, "read(%#lx,%#lx,%lu) - inp_ppcb - failed\n", 36831183Speter (u_long)i->inp_ppcb, (u_long)t, (u_long)sizeof(*t)); 369161357Sguido goto finderror; 37022514Sdarrenr } 37122514Sdarrenr return (struct tcpcb *)i->inp_ppcb; 372161357Sguido 373161357Sguidofinderror: 374161357Sguido if (o != NULL) 375161357Sguido free(o); 376161357Sguido if (f != NULL) 377161357Sguido free(f); 378161357Sguido if (s != NULL) 379161357Sguido free(s); 380161357Sguido if (i != NULL) 381161357Sguido free(i); 382161357Sguido if (t != NULL) 383161357Sguido free(t); 384161357Sguido return NULL; 38522514Sdarrenr} 38622514Sdarrenr#endif /* BSD < 199301 */ 38722514Sdarrenr 38824583Sdarrenrint do_socket(dev, mtu, ti, gwip) 389255332Scy char *dev; 390255332Scy int mtu; 391255332Scy struct tcpiphdr *ti; 392255332Scy struct in_addr gwip; 39322514Sdarrenr{ 39422514Sdarrenr struct sockaddr_in rsin, lsin; 39522514Sdarrenr struct tcpcb *t, tcb; 396172776Sdarrenr int fd, nfd; 397172776Sdarrenr socklen_t len; 39822514Sdarrenr 39922514Sdarrenr printf("Dest. Port: %d\n", ti->ti_dport); 40022514Sdarrenr 40122514Sdarrenr fd = socket(AF_INET, SOCK_STREAM, 0); 40222514Sdarrenr if (fd == -1) 40322514Sdarrenr { 40422514Sdarrenr perror("socket"); 40522514Sdarrenr return -1; 40622514Sdarrenr } 40722514Sdarrenr 40822514Sdarrenr if (fcntl(fd, F_SETFL, FNDELAY) == -1) 40922514Sdarrenr { 41022514Sdarrenr perror("fcntl"); 41122514Sdarrenr return -1; 41222514Sdarrenr } 41322514Sdarrenr 41422514Sdarrenr bzero((char *)&lsin, sizeof(lsin)); 41522514Sdarrenr lsin.sin_family = AF_INET; 41622514Sdarrenr bcopy((char *)&ti->ti_src, (char *)&lsin.sin_addr, 41722514Sdarrenr sizeof(struct in_addr)); 41822514Sdarrenr if (bind(fd, (struct sockaddr *)&lsin, sizeof(lsin)) == -1) 41922514Sdarrenr { 42022514Sdarrenr perror("bind"); 42122514Sdarrenr return -1; 42222514Sdarrenr } 42322514Sdarrenr len = sizeof(lsin); 42422514Sdarrenr (void) getsockname(fd, (struct sockaddr *)&lsin, &len); 42522514Sdarrenr ti->ti_sport = lsin.sin_port; 42622514Sdarrenr printf("sport %d\n", ntohs(lsin.sin_port)); 427161357Sguido 428145519Sdarrenr nfd = initdevice(dev, 1); 429161357Sguido if (nfd == -1) 430161357Sguido return -1; 43122514Sdarrenr 43222514Sdarrenr if (!(t = find_tcp(fd, ti))) 43322514Sdarrenr return -1; 43422514Sdarrenr 43522514Sdarrenr bzero((char *)&rsin, sizeof(rsin)); 43622514Sdarrenr rsin.sin_family = AF_INET; 43722514Sdarrenr bcopy((char *)&ti->ti_dst, (char *)&rsin.sin_addr, 43822514Sdarrenr sizeof(struct in_addr)); 43922514Sdarrenr rsin.sin_port = ti->ti_dport; 44022514Sdarrenr if (connect(fd, (struct sockaddr *)&rsin, sizeof(rsin)) == -1 && 44122514Sdarrenr errno != EINPROGRESS) 44222514Sdarrenr { 44322514Sdarrenr perror("connect"); 44422514Sdarrenr return -1; 44522514Sdarrenr } 44624583Sdarrenr KMCPY(&tcb, t, sizeof(tcb)); 44722514Sdarrenr ti->ti_win = tcb.rcv_adv; 44822514Sdarrenr ti->ti_seq = tcb.snd_nxt - 1; 44922514Sdarrenr ti->ti_ack = tcb.rcv_nxt; 45022514Sdarrenr 45124583Sdarrenr if (send_tcp(nfd, mtu, (ip_t *)ti, gwip) == -1) 45222514Sdarrenr return -1; 45322514Sdarrenr (void)write(fd, "Hello World\n", 12); 45422514Sdarrenr sleep(2); 45522514Sdarrenr close(fd); 45622514Sdarrenr return 0; 45722514Sdarrenr} 458