diff options
| author | Ted Lemon <source@isc.org> | 1998-12-22 22:39:19 +0000 |
|---|---|---|
| committer | Ted Lemon <source@isc.org> | 1998-12-22 22:39:19 +0000 |
| commit | 6203084368a1ba2403e8cc0ba2c38cdbcf147b3c (patch) | |
| tree | e01afa87d04538df28d25f78e1bc8e8b4b7c90bd /common | |
| parent | ef0ab0b3847f6210544bacbe22e3b16597e738c4 (diff) | |
| download | isc-dhcp-6203084368a1ba2403e8cc0ba2c38cdbcf147b3c.tar.gz | |
Share packet filter with lpf.c
Diffstat (limited to 'common')
| -rw-r--r-- | common/bpf.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/common/bpf.c b/common/bpf.c index 60ccb09b..3e4b422f 100644 --- a/common/bpf.c +++ b/common/bpf.c @@ -42,7 +42,7 @@ #ifndef lint static char copyright[] = -"$Id: bpf.c,v 1.19.2.1 1998/12/20 18:21:52 mellon Exp $ Copyright (c) 1995, 1996 The Internet Software Consortium. All rights reserved.\n"; +"$Id: bpf.c,v 1.19.2.2 1998/12/22 22:39:19 mellon Exp $ Copyright (c) 1995, 1996 The Internet Software Consortium. All rights reserved.\n"; #endif /* not lint */ #include "dhcpd.h" @@ -137,12 +137,12 @@ void if_register_send (info) } #endif /* USE_BPF_SEND */ -#ifdef USE_BPF_RECEIVE +#if defined (USE_BPF_RECEIVE) || defined (USE_LPF_RECEIVE) /* Packet filter program... XXX Changes to the filter program may require changes to the constant offsets used in if_register_send to patch the BPF program! XXX */ -struct bpf_insn filter [] = { +struct bpf_insn dhcp_bpf_filter [] = { /* Make sure this is an IP packet... */ BPF_STMT (BPF_LD + BPF_H + BPF_ABS, 12), BPF_JUMP (BPF_JMP + BPF_JEQ + BPF_K, ETHERTYPE_IP, 0, 8), @@ -169,6 +169,10 @@ struct bpf_insn filter [] = { BPF_STMT(BPF_RET+BPF_K, 0), }; +int dhcp_bpf_filter_len = sizeof dhcp_bpf_filter / sizeof (struct bpf_insn); +#endif + +#if defined (USE_BPF_RECEIVE) void if_register_receive (info) struct interface_info *info; { @@ -220,13 +224,13 @@ void if_register_receive (info) info -> rbuf_len = 0; /* Set up the bpf filter program structure. */ - p.bf_len = sizeof filter / sizeof (struct bpf_insn); - p.bf_insns = filter; + p.bf_len = dhcp_bpf_filter_len; + p.bf_insns = dhcp_bpf_filter; /* Patch the server port into the BPF program... XXX changes to filter program may require changes to the insn number(s) used below! XXX */ - filter [8].k = ntohs (local_port); + dhcp_bpf_filter [8].k = ntohs (local_port); if (ioctl (info -> rfdesc, BIOCSETF, &p) < 0) error ("Can't install packet filter program: %m"); |