1/* $FreeBSD$ */ 2/* 3 * sock.c (C) 1995-1998 Darren Reed 4 * 5 * See the IPFILTER.LICENCE file for details on licencing. 6 * 7 */ 8#if !defined(lint) 9static const char sccsid[] = "@(#)sock.c 1.2 1/11/96 (C)1995 Darren Reed"; 10static const char rcsid[] = "@(#)$Id$"; 11#endif 12#include <sys/param.h> 13#include <sys/types.h> 14#include <sys/time.h> 15#include <sys/stat.h> 16#if defined(__NetBSD__) && defined(__vax__) 17/* 18 * XXX need to declare boolean_t for _KERNEL <sys/files.h> 19 * which ends up including <sys/device.h> for vax. See PR#32907 20 * for further details. 21 */ 22typedef int boolean_t; 23#endif 24#include <fcntl.h> 25# include <sys/dirent.h> 26# ifdef __NetBSD__ 27# include <machine/lock.h> 28# endif 29# ifdef __FreeBSD__ 30# define _WANT_FILE 31# else 32# define _KERNEL 33# define KERNEL 34# endif 35# include <sys/file.h> 36# ifdef __FreeBSD__ 37# undef _WANT_FILE 38# else 39# undef _KERNEL 40# undef KERNEL 41# endif 42#include <nlist.h> 43#include <sys/user.h> 44#include <sys/socket.h> 45#include <sys/socketvar.h> 46#include <sys/proc.h> 47# include <kvm.h> 48#ifdef sun 49#include <sys/systm.h> 50#include <sys/session.h> 51#endif 52#include <sys/sysctl.h> 53#include <sys/filedesc.h> 54#include <paths.h> 55#include <math.h> 56#include <netinet/in.h> 57#include <netinet/in_systm.h> 58#include <netinet/ip.h> 59#include <netinet/tcp.h> 60#include <net/if.h> 61# include <net/route.h> 62#include <netinet/ip_var.h> 63#define _WANT_INPCB 64#include <netinet/in_pcb.h> 65#include <netinet/tcp_timer.h> 66#define _WANT_TCPCB 67#include <netinet/tcp_var.h> 68#include <stdio.h> 69#include <unistd.h> 70#include <string.h> 71#include <stdlib.h> 72#include <stddef.h> 73#include <pwd.h> 74#include "ipsend.h" 75 76 77int nproc; 78struct proc *proc; 79 80#ifndef KMEM 81# ifdef _PATH_KMEM 82# define KMEM _PATH_KMEM 83# endif 84#endif 85#ifndef KERNEL 86# ifdef _PATH_UNIX 87# define KERNEL _PATH_UNIX 88# endif 89#endif 90#ifndef KMEM 91# define KMEM "/dev/kmem" 92#endif 93#ifndef KERNEL 94# define KERNEL "/vmunix" 95#endif 96 97 98static struct kinfo_proc *getproc(void); 99 100 101int kmemcpy(buf, pos, n) 102 char *buf; 103 void *pos; 104 int n; 105{ 106 static int kfd = -1; 107 off_t offset = (u_long)pos; 108 109 if (kfd == -1) 110 kfd = open(KMEM, O_RDONLY); 111 112 if (lseek(kfd, offset, SEEK_SET) == -1) 113 { 114 perror("lseek"); 115 return -1; 116 } 117 if (read(kfd, buf, n) == -1) 118 { 119 perror("read"); 120 return -1; 121 } 122 return n; 123} 124 125struct nlist names[4] = { 126 { "_proc" }, 127 { "_nproc" }, 128 { NULL }, 129 { NULL } 130 }; 131 132static struct kinfo_proc *getproc() 133{ 134 static struct kinfo_proc kp; 135 pid_t pid = getpid(); 136 int mib[4]; 137 size_t n; 138 139 mib[0] = CTL_KERN; 140 mib[1] = KERN_PROC; 141 mib[2] = KERN_PROC_PID; 142 mib[3] = pid; 143 144 n = sizeof(kp); 145 if (sysctl(mib, 4, &kp, &n, NULL, 0) == -1) 146 { 147 perror("sysctl"); 148 return NULL; 149 } 150 return &kp; 151} 152 153 154struct tcpcb *find_tcp(tfd, ti) 155 int tfd; 156 struct tcpiphdr *ti; 157{ 158 struct tcpcb *t; 159 struct inpcb *i; 160 struct socket *s; 161 struct filedesc *fd; 162 struct kinfo_proc *p; 163 struct file *f, **o; 164 165 if (!(p = getproc())) 166 return NULL; 167 168 fd = (struct filedesc *)malloc(sizeof(*fd)); 169 if (fd == NULL) 170 return NULL; 171#if defined( __FreeBSD__) 172 if (KMCPY(fd, p->ki_fd, sizeof(*fd)) == -1) 173 { 174 fprintf(stderr, "read(%#lx,%#lx) failed\n", 175 (u_long)p, (u_long)p->ki_fd); 176 free(fd); 177 return NULL; 178 } 179#else 180 if (KMCPY(fd, p->kp_proc.p_fd, sizeof(*fd)) == -1) 181 { 182 fprintf(stderr, "read(%#lx,%#lx) failed\n", 183 (u_long)p, (u_long)p->kp_proc.p_fd); 184 free(fd); 185 return NULL; 186 } 187#endif 188 189 o = NULL; 190 f = NULL; 191 s = NULL; 192 i = NULL; 193 t = NULL; 194 195 o = (struct file **)calloc(fd->fd_lastfile + 1, sizeof(*o)); 196 if (KMCPY(o, fd->fd_ofiles, (fd->fd_lastfile + 1) * sizeof(*o)) == -1) 197 { 198 fprintf(stderr, "read(%#lx,%#lx,%lu) - u_ofile - failed\n", 199 (u_long)fd->fd_ofiles, (u_long)o, (u_long)sizeof(*o)); 200 goto finderror; 201 } 202 f = (struct file *)calloc(1, sizeof(*f)); 203 if (KMCPY(f, o[tfd], sizeof(*f)) == -1) 204 { 205 fprintf(stderr, "read(%#lx,%#lx,%lu) - o[tfd] - failed\n", 206 (u_long)o[tfd], (u_long)f, (u_long)sizeof(*f)); 207 goto finderror; 208 } 209 210 s = (struct socket *)calloc(1, sizeof(*s)); 211 if (KMCPY(s, f->f_data, sizeof(*s)) == -1) 212 { 213 fprintf(stderr, "read(%#lx,%#lx,%lu) - f_data - failed\n", 214 (u_long)f->f_data, (u_long)s, (u_long)sizeof(*s)); 215 goto finderror; 216 } 217 218 i = (struct inpcb *)calloc(1, sizeof(*i)); 219 if (KMCPY(i, s->so_pcb, sizeof(*i)) == -1) 220 { 221 fprintf(stderr, "kvm_read(%#lx,%#lx,%lu) - so_pcb - failed\n", 222 (u_long)s->so_pcb, (u_long)i, (u_long)sizeof(*i)); 223 goto finderror; 224 } 225 226 t = (struct tcpcb *)calloc(1, sizeof(*t)); 227 if (KMCPY(t, i->inp_ppcb, sizeof(*t)) == -1) 228 { 229 fprintf(stderr, "read(%#lx,%#lx,%lu) - inp_ppcb - failed\n", 230 (u_long)i->inp_ppcb, (u_long)t, (u_long)sizeof(*t)); 231 goto finderror; 232 } 233 return (struct tcpcb *)i->inp_ppcb; 234 235finderror: 236 if (o != NULL) 237 free(o); 238 if (f != NULL) 239 free(f); 240 if (s != NULL) 241 free(s); 242 if (i != NULL) 243 free(i); 244 if (t != NULL) 245 free(t); 246 return NULL; 247} 248 249int do_socket(dev, mtu, ti, gwip) 250 char *dev; 251 int mtu; 252 struct tcpiphdr *ti; 253 struct in_addr gwip; 254{ 255 struct sockaddr_in rsin, lsin; 256 struct tcpcb *t, tcb; 257 int fd, nfd; 258 socklen_t len; 259 260 printf("Dest. Port: %d\n", ti->ti_dport); 261 262 fd = socket(AF_INET, SOCK_STREAM, 0); 263 if (fd == -1) 264 { 265 perror("socket"); 266 return -1; 267 } 268 269 if (fcntl(fd, F_SETFL, FNDELAY) == -1) 270 { 271 perror("fcntl"); 272 return -1; 273 } 274 275 bzero((char *)&lsin, sizeof(lsin)); 276 lsin.sin_family = AF_INET; 277 bcopy((char *)&ti->ti_src, (char *)&lsin.sin_addr, 278 sizeof(struct in_addr)); 279 if (bind(fd, (struct sockaddr *)&lsin, sizeof(lsin)) == -1) 280 { 281 perror("bind"); 282 return -1; 283 } 284 len = sizeof(lsin); 285 (void) getsockname(fd, (struct sockaddr *)&lsin, &len); 286 ti->ti_sport = lsin.sin_port; 287 printf("sport %d\n", ntohs(lsin.sin_port)); 288 289 nfd = initdevice(dev, 1); 290 if (nfd == -1) 291 return -1; 292 293 if (!(t = find_tcp(fd, ti))) 294 return -1; 295 296 bzero((char *)&rsin, sizeof(rsin)); 297 rsin.sin_family = AF_INET; 298 bcopy((char *)&ti->ti_dst, (char *)&rsin.sin_addr, 299 sizeof(struct in_addr)); 300 rsin.sin_port = ti->ti_dport; 301 if (connect(fd, (struct sockaddr *)&rsin, sizeof(rsin)) == -1 && 302 errno != EINPROGRESS) 303 { 304 perror("connect"); 305 return -1; 306 } 307 KMCPY(&tcb, t, sizeof(tcb)); 308 ti->ti_win = tcb.rcv_adv; 309 ti->ti_seq = tcb.snd_nxt - 1; 310 ti->ti_ack = tcb.rcv_nxt; 311 312 if (send_tcp(nfd, mtu, (ip_t *)ti, gwip) == -1) 313 return -1; 314 (void)write(fd, "Hello World\n", 12); 315 sleep(2); 316 close(fd); 317 return 0; 318} 319