| if_tun.c (122352) | if_tun.c (123922) |
|---|---|
| 1/* $NetBSD: if_tun.c,v 1.14 1994/06/29 06:36:25 cgd Exp $ */ 2 3/* 4 * Copyright (c) 1988, Julian Onions <jpo@cs.nott.ac.uk> 5 * Nottingham University 1987. 6 * 7 * This source may be freely distributed, however I would be interested 8 * in any changes that are made. 9 * 10 * This driver takes packets off the IP i/f and hands them up to a 11 * user process to have its wicked way with. This driver has it's 12 * roots in a similar driver written by Phil Cockcroft (formerly) at 13 * UCL. This driver is based much more on read/write/poll mode of 14 * operation though. 15 * | 1/* $NetBSD: if_tun.c,v 1.14 1994/06/29 06:36:25 cgd Exp $ */ 2 3/* 4 * Copyright (c) 1988, Julian Onions <jpo@cs.nott.ac.uk> 5 * Nottingham University 1987. 6 * 7 * This source may be freely distributed, however I would be interested 8 * in any changes that are made. 9 * 10 * This driver takes packets off the IP i/f and hands them up to a 11 * user process to have its wicked way with. This driver has it's 12 * roots in a similar driver written by Phil Cockcroft (formerly) at 13 * UCL. This driver is based much more on read/write/poll mode of 14 * operation though. 15 * |
| 16 * $FreeBSD: head/sys/net/if_tun.c 122352 2003-11-09 09:17:26Z tanimura $ | 16 * $FreeBSD: head/sys/net/if_tun.c 123922 2003-12-28 03:56:00Z sam $ |
| 17 */ 18 19#include "opt_atalk.h" 20#include "opt_inet.h" 21#include "opt_inet6.h" 22#include "opt_ipx.h" 23#include "opt_mac.h" 24 --- 426 unchanged lines hidden (view full) --- 451 if (dst->sa_family == AF_UNSPEC) { 452 dst->sa_family = *(mtod(m0, int *)); 453 m0->m_len -= sizeof(int); 454 m0->m_pkthdr.len -= sizeof(int); 455 m0->m_data += sizeof(int); 456 } 457 458 if (ifp->if_bpf) { | 17 */ 18 19#include "opt_atalk.h" 20#include "opt_inet.h" 21#include "opt_inet6.h" 22#include "opt_ipx.h" 23#include "opt_mac.h" 24 --- 426 unchanged lines hidden (view full) --- 451 if (dst->sa_family == AF_UNSPEC) { 452 dst->sa_family = *(mtod(m0, int *)); 453 m0->m_len -= sizeof(int); 454 m0->m_pkthdr.len -= sizeof(int); 455 m0->m_data += sizeof(int); 456 } 457 458 if (ifp->if_bpf) { |
| 459 /* 460 * We need to prepend the address family as 461 * a four byte field. Cons up a dummy header 462 * to pacify bpf. This is safe because bpf 463 * will only read from the mbuf (i.e., it won't 464 * try to free it or keep a pointer to it). 465 */ 466 struct mbuf m; | |
| 467 uint32_t af = dst->sa_family; | 459 uint32_t af = dst->sa_family; |
| 468 469 m.m_next = m0; 470 m.m_len = 4; 471 m.m_data = (char *)⁡ 472 473 BPF_MTAP(ifp, &m); | 460 bpf_mtap2(ifp->if_bpf, &af, sizeof(af), m0); |
| 474 } 475 476 /* prepend sockaddr? this may abort if the mbuf allocation fails */ 477 if (tp->tun_flags & TUN_LMODE) { 478 /* allocate space for sockaddr */ 479 M_PREPEND(m0, dst->sa_len, M_DONTWAIT); 480 481 /* if allocation failed drop packet */ --- 256 unchanged lines hidden (view full) --- 738 } 739 740 top->m_pkthdr.len = tlen; 741 top->m_pkthdr.rcvif = ifp; 742#ifdef MAC 743 mac_create_mbuf_from_ifnet(ifp, top); 744#endif 745 | 461 } 462 463 /* prepend sockaddr? this may abort if the mbuf allocation fails */ 464 if (tp->tun_flags & TUN_LMODE) { 465 /* allocate space for sockaddr */ 466 M_PREPEND(m0, dst->sa_len, M_DONTWAIT); 467 468 /* if allocation failed drop packet */ --- 256 unchanged lines hidden (view full) --- 725 } 726 727 top->m_pkthdr.len = tlen; 728 top->m_pkthdr.rcvif = ifp; 729#ifdef MAC 730 mac_create_mbuf_from_ifnet(ifp, top); 731#endif 732 |
| 746 if (ifp->if_bpf) { 747 if (tp->tun_flags & TUN_IFHEAD) { 748 /* 749 * Conveniently, we already have a 4-byte address 750 * family prepended to our packet ! 751 * Inconveniently, it's in the wrong byte order ! 752 */ 753 if ((top = m_pullup(top, sizeof(family))) == NULL) 754 return (ENOBUFS); 755 *mtod(top, u_int32_t *) = 756 ntohl(*mtod(top, u_int32_t *)); 757 BPF_MTAP(ifp, top); 758 *mtod(top, u_int32_t *) = 759 htonl(*mtod(top, u_int32_t *)); 760 } else { 761 /* 762 * We need to prepend the address family as 763 * a four byte field. Cons up a dummy header 764 * to pacify bpf. This is safe because bpf 765 * will only read from the mbuf (i.e., it won't 766 * try to free it or keep a pointer to it). 767 */ 768 struct mbuf m; 769 uint32_t af = AF_INET; 770 771 m.m_next = top; 772 m.m_len = 4; 773 m.m_data = (char *)⁡ 774 775 BPF_MTAP(ifp, &m); 776 } 777 } 778 | |
| 779 if (tp->tun_flags & TUN_IFHEAD) { 780 if (top->m_len < sizeof(family) && 781 (top = m_pullup(top, sizeof(family))) == NULL) 782 return (ENOBUFS); 783 family = ntohl(*mtod(top, u_int32_t *)); 784 m_adj(top, sizeof(family)); 785 } else 786 family = AF_INET; 787 | 733 if (tp->tun_flags & TUN_IFHEAD) { 734 if (top->m_len < sizeof(family) && 735 (top = m_pullup(top, sizeof(family))) == NULL) 736 return (ENOBUFS); 737 family = ntohl(*mtod(top, u_int32_t *)); 738 m_adj(top, sizeof(family)); 739 } else 740 family = AF_INET; 741 |
| 742 BPF_MTAP2(ifp, &family, sizeof(family), top); 743 |
|
| 788 switch (family) { 789#ifdef INET 790 case AF_INET: 791 isr = NETISR_IP; 792 break; 793#endif 794#ifdef INET6 795 case AF_INET6: --- 57 unchanged lines hidden --- | 744 switch (family) { 745#ifdef INET 746 case AF_INET: 747 isr = NETISR_IP; 748 break; 749#endif 750#ifdef INET6 751 case AF_INET6: --- 57 unchanged lines hidden --- |