/* * netsniff-ng - the packet sniffing beast * Copyright 2009, 2010 Daniel Borkmann. * Copyright 2009, 2010 Emmanuel Roullit. * Copyright 2014, 2015 Tobias Klauser. * Subject to the GPL, version 2. */ #include #include #include #include #include #include #include #include #include #include "die.h" #include "xmalloc.h" #include "ring_tx.h" #include "built_in.h" static void set_packet_loss_discard(int sock) { int ret, discard = 1; ret = setsockopt(sock, SOL_PACKET, PACKET_LOSS, (void *) &discard, sizeof(discard)); if (ret < 0) panic("setsockopt: cannot set packet loss"); } void destroy_tx_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_TX_RING, &ring->layout, sizeof(ring->layout)); if (unlikely(ret)) panic("Cannot destroy the TX_RING: %s!\n", strerror(errno)); xfree(ring->frames); } static void setup_tx_ring_layout(int sock, struct ring *ring, size_t size, bool jumbo_support) { setup_ring_layout_generic(ring, size, jumbo_support); set_sockopt_tpacket_v2(sock); ring_verify_layout(ring); } static void create_tx_ring(int sock, struct ring *ring, bool verbose) { int ret; retry: ret = setsockopt(sock, SOL_PACKET, PACKET_TX_RING, &ring->layout, sizeof(ring->layout)); if (errno == ENOMEM && ring->layout.tp_block_nr > 1) { shrink_ring_layout_generic(ring); goto retry; } if (ret < 0) panic("Cannot allocate TX_RING!\n"); ring->mm_len = (size_t) ring->layout.tp_block_size * ring->layout.tp_block_nr; if (verbose) { printf("TX,V2: %.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); } } static void alloc_tx_ring_frames(int sock __maybe_unused, struct ring *ring) { alloc_ring_frames_generic(ring, ring->layout.tp_frame_nr, ring->layout.tp_frame_size); } void ring_tx_setup(struct ring *ring, int sock, size_t size, int ifindex, bool jumbo_support, bool verbose) { fmemset(ring, 0, sizeof(*ring)); set_packet_loss_discard(sock); setup_tx_ring_layout(sock, ring, size, jumbo_support); create_tx_ring(sock, ring, verbose); mmap_ring_generic(sock, ring); alloc_tx_ring_frames(sock, ring); bind_ring_generic(sock, ring, ifindex, true); } d8954a68a86657784705955088a'/>
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authorSven Eckelmann <sven@narfation.org>2016-11-02 18:14:43 +0100
committerSimon Wunderlich <sw@simonwunderlich.de>2016-11-04 12:27:34 +0100
commit27915aa61060fd8954a68a86657784705955088a (patch)
tree88d8f51cbcffedfdee671104413c8b61ba7a54a8 /Documentation
parent9799c50372b23ed774791bdb87d700f1286ee8a9 (diff)
batman-adv: Revert "fix splat on disabling an interface"
The commit 9799c50372b2 ("batman-adv: fix splat on disabling an interface") fixed a warning but at the same time broke the rtnl function add_slave for devices which were temporarily removed. batadv_softif_slave_add requires soft_iface of and hard_iface to be NULL before it is allowed to be enslaved. But this resetting of soft_iface to NULL in batadv_hardif_disable_interface was removed with the aforementioned commit. Reported-by: Julian Labus <julian@freifunk-rtk.de> Signed-off-by: Sven Eckelmann <sven@narfation.org> Acked-by: Linus Lüssing <linus.luessing@c0d3.blue> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Diffstat (limited to 'Documentation')