* Process a received Ethernet packet; the packet is in the * mbuf chain m with the ethernet header at the front. */
| 516 | * mbuf chain m with the ethernet header at the front. |
| 517 | */ |
| 518 | static void |
| 519 | ether_input_internal(struct ifnet *ifp, struct mbuf *m) |
| 520 | { |
| 521 | struct ether_header *eh; |
| 522 | u_short etype; |
| 523 | |
| 524 | if ((ifp->if_flags & IFF_UP) == 0) { |
| 525 | m_freem(m); |
| 526 | return; |
| 527 | } |
| 528 | #ifdef DIAGNOSTIC |
| 529 | if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { |
| 530 | if_printf(ifp, "discard frame at !IFF_DRV_RUNNING\n"); |
| 531 | m_freem(m); |
| 532 | return; |
| 533 | } |
| 534 | #endif |
| 535 | if (m->m_len < ETHER_HDR_LEN) { |
| 536 | /* XXX maybe should pullup? */ |
| 537 | if_printf(ifp, "discard frame w/o leading ethernet " |
| 538 | "header (len %u pkt len %u)\n", |
| 539 | m->m_len, m->m_pkthdr.len); |
| 540 | if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); |
| 541 | m_freem(m); |
| 542 | return; |
| 543 | } |
| 544 | eh = mtod(m, struct ether_header *); |
| 545 | etype = ntohs(eh->ether_type); |
| 546 | random_harvest_queue_ether(m, sizeof(*m)); |
| 547 | |
| 548 | #ifdef EXPERIMENTAL |
| 549 | #if defined(INET6) && defined(INET) |
| 550 | /* draft-ietf-6man-ipv6only-flag */ |
| 551 | /* Catch ETHERTYPE_IP, and ETHERTYPE_[REV]ARP if we are v6-only. */ |
| 552 | if ((ND_IFINFO(ifp)->flags & ND6_IFF_IPV6_ONLY_MASK) != 0) { |
| 553 | switch (etype) { |
| 554 | case ETHERTYPE_IP: |
| 555 | case ETHERTYPE_ARP: |
| 556 | case ETHERTYPE_REVARP: |
| 557 | m_freem(m); |
| 558 | return; |
| 559 | /* NOTREACHED */ |
| 560 | break; |
| 561 | }; |
| 562 | } |
| 563 | #endif |
| 564 | #endif |
| 565 | |
| 566 | CURVNET_SET_QUIET(ifp->if_vnet); |
| 567 | |
| 568 | if (ETHER_IS_MULTICAST(eh->ether_dhost)) { |
| 569 | if (ETHER_IS_BROADCAST(eh->ether_dhost)) |
| 570 | m->m_flags |= M_BCAST; |
| 571 | else |
| 572 | m->m_flags |= M_MCAST; |
| 573 | if_inc_counter(ifp, IFCOUNTER_IMCASTS, 1); |
| 574 | } |
| 575 |
no test coverage detected