diff options
author | Luke Shumaker <lukeshu@sbcglobal.net> | 2016-07-28 00:37:09 -0400 |
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committer | Luke Shumaker <lukeshu@sbcglobal.net> | 2016-07-28 00:37:09 -0400 |
commit | 9b97598cc8b30fcefb5099cb0950009b3e16fb9e (patch) | |
tree | a995f031ea151163f960dbe5afb159b0d3263cec /src/libsystemd-network/lldp-network.c | |
parent | a22aa4f10d4b41ce614ef02f5c6147625dca36db (diff) |
./move.sh
Diffstat (limited to 'src/libsystemd-network/lldp-network.c')
-rw-r--r-- | src/libsystemd-network/lldp-network.c | 76 |
1 files changed, 0 insertions, 76 deletions
diff --git a/src/libsystemd-network/lldp-network.c b/src/libsystemd-network/lldp-network.c deleted file mode 100644 index f031760351..0000000000 --- a/src/libsystemd-network/lldp-network.c +++ /dev/null @@ -1,76 +0,0 @@ -/*** - This file is part of systemd. - - Copyright (C) 2014 Tom Gundersen - Copyright (C) 2014 Susant Sahani - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. - - systemd is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with systemd; If not, see <http://www.gnu.org/licenses/>. -***/ - -#include <linux/filter.h> -#include <netinet/if_ether.h> - -#include "fd-util.h" -#include "lldp-network.h" -#include "socket-util.h" - -int lldp_network_bind_raw_socket(int ifindex) { - - static const struct sock_filter filter[] = { - BPF_STMT(BPF_LD + BPF_W + BPF_ABS, offsetof(struct ethhdr, h_dest)), /* A <- 4 bytes of destination MAC */ - BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, 0x0180c200, 1, 0), /* A != 01:80:c2:00 */ - BPF_STMT(BPF_RET + BPF_K, 0), /* drop packet */ - BPF_STMT(BPF_LD + BPF_H + BPF_ABS, offsetof(struct ethhdr, h_dest) + 4), /* A <- remaining 2 bytes of destination MAC */ - BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, 0x0000, 3, 0), /* A != 00:00 */ - BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, 0x0003, 2, 0), /* A != 00:03 */ - BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, 0x000e, 1, 0), /* A != 00:0e */ - BPF_STMT(BPF_RET + BPF_K, 0), /* drop packet */ - BPF_STMT(BPF_LD + BPF_H + BPF_ABS, offsetof(struct ethhdr, h_proto)), /* A <- protocol */ - BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, ETHERTYPE_LLDP, 1, 0), /* A != ETHERTYPE_LLDP */ - BPF_STMT(BPF_RET + BPF_K, 0), /* drop packet */ - BPF_STMT(BPF_RET + BPF_K, (uint32_t) -1), /* accept packet */ - }; - - static const struct sock_fprog fprog = { - .len = ELEMENTSOF(filter), - .filter = (struct sock_filter*) filter, - }; - - union sockaddr_union saddrll = { - .ll.sll_family = AF_PACKET, - .ll.sll_ifindex = ifindex, - }; - - _cleanup_close_ int fd = -1; - int r; - - assert(ifindex > 0); - - fd = socket(PF_PACKET, SOCK_RAW|SOCK_CLOEXEC|SOCK_NONBLOCK, htons(ETHERTYPE_LLDP)); - if (fd < 0) - return -errno; - - r = setsockopt(fd, SOL_SOCKET, SO_ATTACH_FILTER, &fprog, sizeof(fprog)); - if (r < 0) - return -errno; - - r = bind(fd, &saddrll.sa, sizeof(saddrll.ll)); - if (r < 0) - return -errno; - - r = fd; - fd = -1; - - return r; -} |