/* * netsniff-ng - the packet sniffing beast * Copyright 2009, 2010 Daniel Borkmann. * Subject to the GPL, version 2. */ #include #include #include #include #include #include #include #include #include #include "xmalloc.h" #include "die.h" #include "ring_rx.h" #include "built_in.h" void destroy_rx_ring(int sock, struct ring *ring) { int ret; munmap(ring->mm_space, ring->mm_len); ring->mm_len = 0; fmemset(&ring->layout, 0, sizeof(ring->layout)); ret = setsockopt(sock, SOL_PACKET, PACKET_RX_RING, &ring->layout, sizeof(ring->layout)); if (unlikely(ret)) panic("Cannot destroy the RX_RING: %s!\n", strerror(errno)); xfree(ring->frames); } void setup_rx_ring_layout(int sock, struct ring *ring, unsigned int size, int jumbo_support) { fmemset(&ring->layout, 0, sizeof(ring->layout)); ring->layout.tp_block_size = (jumbo_support ? getpagesize() << 4 : getpagesize() << 2); ring->layout.tp_frame_size = (jumbo_support ? TPACKET_ALIGNMENT << 12 : TPACKET_ALIGNMENT << 7); ring->layout.tp_block_nr = size / ring->layout.tp_block_size; ring->layout.tp_frame_nr = ring->layout.tp_block_size / ring->layout.tp_frame_size * ring->layout.tp_block_nr; bug_on(ring->layout.tp_block_size < ring->layout.tp_frame_size); bug_on((ring->layout.tp_block_size % ring->layout.tp_frame_size) != 0); bug_on((ring->layout.tp_block_size % getpagesize()) != 0); } void create_rx_ring(int sock, struct ring *ring, int verbose) { int ret; set_sockopt_tpacket(sock); retry: ret = setsockopt(sock, SOL_PACKET, PACKET_RX_RING, &ring->layout, sizeof(ring->layout)); if (errno == ENOMEM && ring->layout.tp_block_nr > 1) { ring->layout.tp_block_nr >>= 1; ring->layout.tp_frame_nr = ring->layout.tp_block_size / ring->layout.tp_frame_size * ring->layout.tp_block_nr; goto retry; } if (ret < 0) panic("Cannot allocate RX_RING!\n"); ring->mm_len = ring->layout.tp_block_size * ring->layout.tp_block_nr; if (verbose) { printf("RX: %.2Lf MiB, %u Frames, each %u Byte allocated\n", (long double) ring->mm_len / (1 << 20), ring->layout.tp_frame_nr, ring->layout.tp_frame_size); } } void mmap_rx_ring(int sock, struct ring *ring) { ring->mm_space = mmap(0, ring->mm_len, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_LOCKED | MAP_POPULATE, sock, 0); if (ring->mm_space == MAP_FAILED) { destroy_rx_ring(sock, ring); panic("Cannot mmap RX_RING!\n"); } } void alloc_rx_ring_frames(struct ring *ring) { int i; size_t len = ring->layout.tp_frame_nr * sizeof(*ring->frames); ring->frames = xmalloc_aligned(len, CO_CACHE_LINE_SIZE); fmemset(ring->frames, 0, len); for (i = 0; i < ring->layout.tp_frame_nr; ++i) { ring->frames[i].iov_len = ring->layout.tp_frame_size; ring->frames[i].iov_base = ring->mm_space + (i * ring->layout.tp_frame_size); } } void bind_rx_ring(int sock, struct ring *ring, int ifindex) { int ret; /* * The RX_RING registers itself to the networking stack with * dev_add_pack(), so we have one single RX_RING for all devs * otherwise you'll get the packet twice. */ fmemset(&ring->s_ll, 0, sizeof(ring->s_ll)); ring->s_ll.sll_family = AF_PACKET; ring->s_ll.sll_protocol = htons(ETH_P_ALL); ring->s_ll.sll_ifindex = ifindex; ring->s_ll.sll_hatype = 0; ring->s_ll.sll_halen = 0; ring->s_ll.sll_pkttype = 0; ret = bind(sock, (struct sockaddr *) &ring->s_ll, sizeof(ring->s_ll)); if (ret < 0) { destroy_rx_ring(sock, ring); panic("Cannot bind RX_RING!\n"); } } letions'>-15/+9 2017-02-10switchdev: bridge: Offload multicast disabledNogah Frankel1-0/+16 2017-02-10sched: check negative err value to safe one level of indentJiri Pirko1-13/+9 2017-02-10sched: add missing curly braces in else branch in tc_ctl_tfilterJiri Pirko1-1/+2 2017-02-10sched: move err set right before goto errout in tc_ctl_tfilterJiri Pirko1-10/+19 2017-02-10sched: push TC filter protocol creation into a separate functionJiri Pirko1-51/+59 2017-02-10sched: move tcf_proto_destroy and tcf_destroy_chain helpers into cls_apiJiri Pirko13-24/+32 2017-02-10sched: rename tcf_destroy to tcf_destroy_protoJiri Pirko2-6/+6 2017-02-10ipv4: fib: Add events for FIB replace and appendIdo Schimmel1-13/+14 2017-02-10ipv4: fib: Send notification before deleting FIB aliasIdo Schimmel1-7/+7 2017-02-10ipv4: fib: Send deletion notification with actual FIB alias typeIdo Schimmel1-2/+2 2017-02-10ipv4: fib: Only flush FIB aliases belonging to currently flushed tableIdo Schimmel1-1/+2 2017-02-09openvswitch: Pack struct sw_flow_key.Jarno Rajahalme4-34/+39 2017-02-09openvswitch: Add force commit.Jarno Rajahalme1-2/+24 2017-02-09openvswitch: Add original direction conntrack tuple to sw_flow_key.Jarno Rajahalme7-46/+227 2017-02-09openvswitch: Inherit master's labels.Jarno Rajahalme1-14/+31 2017-02-09openvswitch: Refactor labels initialization.Jarno Rajahalme1-42/+62 2017-02-09openvswitch: Simplify labels length logic.Jarno Rajahalme1-11/+9 2017-02-09openvswitch: Unionize ovs_key_ct_label with a u32 array.Jarno Rajahalme1-7/+8 2017-02-09openvswitch: Do not trigger events for unconfirmed connections.Jarno Rajahalme1-6/+22 2017-02-09openvswitch: Use inverted tuple in ovs_ct_find_existing() if NATted.Jarno Rajahalme1-2/+22 2017-02-09openvswitch: Fix comments for skb->_nfctJarno Rajahalme1-7/+7 2017-02-09net: dsa: Fix duplicate object ruleFlorian Fainelli1-1/+0 2017-02-09sctp: implement sender-side procedures for Add Incoming/Outgoing Streams Requ...Xin Long2-0/+106 2017-02-09sctp: add support for generating stream reconf add incoming/outgoing streams ...Xin Long1-0/+46 2017-02-09sctp: implement sender-side procedures for SSN/TSN Reset Request ParameterXin Long2-0/+69 2017-02-09sctp: add support for generating stream reconf ssn/tsn reset request chunkXin Long1-0/+29 2017-02-09sctp: streams should be recovered when it fails to send request.Xin Long1-2/+17 2017-02-08ipv4: fib: Notify about nexthop status changesIdo Schimmel1-0/+33 2017-02-08bridge: vlan tunnel id info range fill size calc cleanupsRoopa Prabhu1-18/+16 2017-02-08gro_cells: move to net/core/gro_cells.cEric Dumazet6-0/+100 2017-02-07Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller