| ip_fastfwd.c (135920) | ip_fastfwd.c (136690) |
|---|---|
| 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 135920 2004-09-29 04:54:33Z mlaier $ | 29 * $FreeBSD: head/sys/netinet/ip_fastfwd.c 136690 2004-10-19 14:31:56Z 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 --- 198 unchanged lines hidden (view full) --- 236 sum = in_cksum_hdr(ip); 237 else 238 sum = in_cksum(m, hlen); 239 } 240 if (sum) { 241 ipstat.ips_badsum++; 242 goto drop; 243 } | 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 --- 198 unchanged lines hidden (view full) --- 236 sum = in_cksum_hdr(ip); 237 else 238 sum = in_cksum(m, hlen); 239 } 240 if (sum) { 241 ipstat.ips_badsum++; 242 goto drop; 243 } |
| 244 245 /* 246 * Remeber that we have checked the IP header and found it valid. 247 */ |
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| 244 m->m_pkthdr.csum_flags |= (CSUM_IP_CHECKED | CSUM_IP_VALID); 245 246 ip_len = ntohs(ip->ip_len); 247 248 /* 249 * Is IP length longer than packet we have got? 250 */ 251 if (m->m_pkthdr.len < ip_len) { --- 151 unchanged lines hidden (view full) --- 403 if (!ipstealth) { 404#endif 405 if (ip->ip_ttl <= IPTTLDEC) { 406 icmp_error(m, ICMP_TIMXCEED, ICMP_TIMXCEED_INTRANS, 0, NULL); 407 return 1; 408 } 409 410 /* | 248 m->m_pkthdr.csum_flags |= (CSUM_IP_CHECKED | CSUM_IP_VALID); 249 250 ip_len = ntohs(ip->ip_len); 251 252 /* 253 * Is IP length longer than packet we have got? 254 */ 255 if (m->m_pkthdr.len < ip_len) { --- 151 unchanged lines hidden (view full) --- 407 if (!ipstealth) { 408#endif 409 if (ip->ip_ttl <= IPTTLDEC) { 410 icmp_error(m, ICMP_TIMXCEED, ICMP_TIMXCEED_INTRANS, 0, NULL); 411 return 1; 412 } 413 414 /* |
| 411 * Decrement the TTL and incrementally change the checksum. 412 * Don't bother doing this with hw checksum offloading. | 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. |
| 413 */ 414 ip->ip_ttl -= IPTTLDEC; 415 if (ip->ip_sum >= (u_int16_t) ~htons(IPTTLDEC << 8)) 416 ip->ip_sum -= ~htons(IPTTLDEC << 8); 417 else 418 ip->ip_sum += htons(IPTTLDEC << 8); 419#ifdef IPSTEALTH 420 } --- 36 unchanged lines hidden (view full) --- 457 if (odest.s_addr != dest.s_addr || fwd_tag != NULL) { 458#endif /* IPFIREWALL_FORWARD */ 459 /* 460 * Is it now for a local address on this host? 461 */ 462#ifndef IPFIREWALL_FORWARD 463 if (in_localip(dest)) { 464#else | 418 */ 419 ip->ip_ttl -= IPTTLDEC; 420 if (ip->ip_sum >= (u_int16_t) ~htons(IPTTLDEC << 8)) 421 ip->ip_sum -= ~htons(IPTTLDEC << 8); 422 else 423 ip->ip_sum += htons(IPTTLDEC << 8); 424#ifdef IPSTEALTH 425 } --- 36 unchanged lines hidden (view full) --- 462 if (odest.s_addr != dest.s_addr || fwd_tag != NULL) { 463#endif /* IPFIREWALL_FORWARD */ 464 /* 465 * Is it now for a local address on this host? 466 */ 467#ifndef IPFIREWALL_FORWARD 468 if (in_localip(dest)) { 469#else |
| 465 if (in_localip(dest) || m->m_flags & M_FASTFWD_OURS) { | 470 if (m->m_flags & M_FASTFWD_OURS || in_localip(dest)) { |
| 466#endif /* IPFIREWALL_FORWARD */ 467forwardlocal: 468 /* 469 * Return packet for processing by ip_input(). 470 * Keep host byte order as expected at ip_input's 471 * "ours"-label. 472 */ 473 m->m_flags |= M_FASTFWD_OURS; --- 139 unchanged lines hidden --- | 471#endif /* IPFIREWALL_FORWARD */ 472forwardlocal: 473 /* 474 * Return packet for processing by ip_input(). 475 * Keep host byte order as expected at ip_input's 476 * "ours"-label. 477 */ 478 m->m_flags |= M_FASTFWD_OURS; --- 139 unchanged lines hidden --- |