| ip_fastfwd.c (144301) | ip_fastfwd.c (145863) |
|---|---|
| 1/*- 2 * Copyright (c) 2003 Andre Oppermann, Internet Business Solutions AG 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 12 unchanged lines hidden (view full) --- 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * | 1/*- 2 * Copyright (c) 2003 Andre Oppermann, Internet Business Solutions AG 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 12 unchanged lines hidden (view full) --- 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * |
| 29 * $FreeBSD: head/sys/netinet/ip_fastfwd.c 144301 2005-03-29 13:43:09Z glebius $ | 29 * $FreeBSD: head/sys/netinet/ip_fastfwd.c 145863 2005-05-04 13:09:19Z andre $ |
| 30 */ 31 32/* 33 * ip_fastforward gets its speed from processing the forwarded packet to 34 * completion (if_output on the other side) without any queues or netisr's. 35 * The receiving interface DMAs the packet into memory, the upper half of 36 * driver calls ip_fastforward, we do our routing table lookup and directly 37 * send it off to the outgoing interface which DMAs the packet to the --- 94 unchanged lines hidden (view full) --- 132 (rt->rt_ifp->if_flags & IFF_RUNNING)) { 133 if (rt->rt_flags & RTF_GATEWAY) 134 dst = (struct sockaddr_in *)rt->rt_gateway; 135 } else { 136 ipstat.ips_noroute++; 137 ipstat.ips_cantforward++; 138 if (rt) 139 RTFREE(rt); | 30 */ 31 32/* 33 * ip_fastforward gets its speed from processing the forwarded packet to 34 * completion (if_output on the other side) without any queues or netisr's. 35 * The receiving interface DMAs the packet into memory, the upper half of 36 * driver calls ip_fastforward, we do our routing table lookup and directly 37 * send it off to the outgoing interface which DMAs the packet to the --- 94 unchanged lines hidden (view full) --- 132 (rt->rt_ifp->if_flags & IFF_RUNNING)) { 133 if (rt->rt_flags & RTF_GATEWAY) 134 dst = (struct sockaddr_in *)rt->rt_gateway; 135 } else { 136 ipstat.ips_noroute++; 137 ipstat.ips_cantforward++; 138 if (rt) 139 RTFREE(rt); |
| 140 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_HOST, 0, NULL); | 140 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_HOST, 0, 0); |
| 141 return NULL; 142 } 143 return dst; 144} 145 146/* 147 * Try to forward a packet based on the destination address. 148 * This is a fast path optimized for the plain forwarding case. --- 143 unchanged lines hidden (view full) --- 292 /* 293 * Only IP packets without options 294 */ 295 if (ip->ip_hl != (sizeof(struct ip) >> 2)) { 296 if (ip_doopts == 1) 297 return 0; 298 else if (ip_doopts == 2) { 299 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_FILTER_PROHIB, | 141 return NULL; 142 } 143 return dst; 144} 145 146/* 147 * Try to forward a packet based on the destination address. 148 * This is a fast path optimized for the plain forwarding case. --- 143 unchanged lines hidden (view full) --- 292 /* 293 * Only IP packets without options 294 */ 295 if (ip->ip_hl != (sizeof(struct ip) >> 2)) { 296 if (ip_doopts == 1) 297 return 0; 298 else if (ip_doopts == 2) { 299 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_FILTER_PROHIB, |
| 300 0, NULL); | 300 0, 0); |
| 301 return 1; 302 } 303 /* else ignore IP options and continue */ 304 } 305 306 /* 307 * Only unicast IP, not from loopback, no L2 or IP broadcast, 308 * no multicast, no INADDR_ANY --- 93 unchanged lines hidden (view full) --- 402 403 /* 404 * Check TTL 405 */ 406#ifdef IPSTEALTH 407 if (!ipstealth) { 408#endif 409 if (ip->ip_ttl <= IPTTLDEC) { | 301 return 1; 302 } 303 /* else ignore IP options and continue */ 304 } 305 306 /* 307 * Only unicast IP, not from loopback, no L2 or IP broadcast, 308 * no multicast, no INADDR_ANY --- 93 unchanged lines hidden (view full) --- 402 403 /* 404 * Check TTL 405 */ 406#ifdef IPSTEALTH 407 if (!ipstealth) { 408#endif 409 if (ip->ip_ttl <= IPTTLDEC) { |
| 410 icmp_error(m, ICMP_TIMXCEED, ICMP_TIMXCEED_INTRANS, 0, NULL); | 410 icmp_error(m, ICMP_TIMXCEED, ICMP_TIMXCEED_INTRANS, 0, 0); |
| 411 return 1; 412 } 413 414 /* 415 * Decrement the TTL and incrementally change the IP header checksum. 416 * Don't bother doing this with hw checksum offloading, it's faster 417 * doing it right here. 418 */ --- 88 unchanged lines hidden (view full) --- 507 * Step 6: send off the packet 508 */ 509 510 /* 511 * Check if route is dampned (when ARP is unable to resolve) 512 */ 513 if ((ro.ro_rt->rt_flags & RTF_REJECT) && 514 ro.ro_rt->rt_rmx.rmx_expire >= time_second) { | 411 return 1; 412 } 413 414 /* 415 * Decrement the TTL and incrementally change the IP header checksum. 416 * Don't bother doing this with hw checksum offloading, it's faster 417 * doing it right here. 418 */ --- 88 unchanged lines hidden (view full) --- 507 * Step 6: send off the packet 508 */ 509 510 /* 511 * Check if route is dampned (when ARP is unable to resolve) 512 */ 513 if ((ro.ro_rt->rt_flags & RTF_REJECT) && 514 ro.ro_rt->rt_rmx.rmx_expire >= time_second) { |
| 515 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_HOST, 0, NULL); | 515 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_HOST, 0, 0); |
| 516 goto consumed; 517 } 518 519#ifndef ALTQ 520 /* 521 * Check if there is enough space in the interface queue 522 */ 523 if ((ifp->if_snd.ifq_len + ip->ip_len / ifp->if_mtu + 1) >= 524 ifp->if_snd.ifq_maxlen) { 525 ipstat.ips_odropped++; 526 /* would send source quench here but that is depreciated */ 527 goto drop; 528 } 529#endif 530 531 /* 532 * Check if media link state of interface is not down 533 */ 534 if (ifp->if_link_state == LINK_STATE_DOWN) { | 516 goto consumed; 517 } 518 519#ifndef ALTQ 520 /* 521 * Check if there is enough space in the interface queue 522 */ 523 if ((ifp->if_snd.ifq_len + ip->ip_len / ifp->if_mtu + 1) >= 524 ifp->if_snd.ifq_maxlen) { 525 ipstat.ips_odropped++; 526 /* would send source quench here but that is depreciated */ 527 goto drop; 528 } 529#endif 530 531 /* 532 * Check if media link state of interface is not down 533 */ 534 if (ifp->if_link_state == LINK_STATE_DOWN) { |
| 535 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_HOST, 0, NULL); | 535 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_HOST, 0, 0); |
| 536 goto consumed; 537 } 538 539 /* 540 * Check if packet fits MTU or if hardware will fragement for us 541 */ 542 if (ro.ro_rt->rt_rmx.rmx_mtu) 543 mtu = min(ro.ro_rt->rt_rmx.rmx_mtu, ifp->if_mtu); --- 14 unchanged lines hidden (view full) --- 558 (struct sockaddr *)dst, ro.ro_rt); 559 } else { 560 /* 561 * Handle EMSGSIZE with icmp reply needfrag for TCP MTU discovery 562 */ 563 if (ip->ip_off & IP_DF) { 564 ipstat.ips_cantfrag++; 565 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_NEEDFRAG, | 536 goto consumed; 537 } 538 539 /* 540 * Check if packet fits MTU or if hardware will fragement for us 541 */ 542 if (ro.ro_rt->rt_rmx.rmx_mtu) 543 mtu = min(ro.ro_rt->rt_rmx.rmx_mtu, ifp->if_mtu); --- 14 unchanged lines hidden (view full) --- 558 (struct sockaddr *)dst, ro.ro_rt); 559 } else { 560 /* 561 * Handle EMSGSIZE with icmp reply needfrag for TCP MTU discovery 562 */ 563 if (ip->ip_off & IP_DF) { 564 ipstat.ips_cantfrag++; 565 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_NEEDFRAG, |
| 566 0, ifp); | 566 0, mtu); |
| 567 goto consumed; 568 } else { 569 /* 570 * We have to fragement the packet 571 */ 572 m->m_pkthdr.csum_flags |= CSUM_IP; 573 /* 574 * ip_fragment expects ip_len and ip_off in host byte --- 48 unchanged lines hidden --- | 567 goto consumed; 568 } else { 569 /* 570 * We have to fragement the packet 571 */ 572 m->m_pkthdr.csum_flags |= CSUM_IP; 573 /* 574 * ip_fragment expects ip_len and ip_off in host byte --- 48 unchanged lines hidden --- |