diff options
Diffstat (limited to 'contrib/isc-dhcp/common/lpf.c')
| -rw-r--r-- | contrib/isc-dhcp/common/lpf.c | 68 |
1 files changed, 56 insertions, 12 deletions
diff --git a/contrib/isc-dhcp/common/lpf.c b/contrib/isc-dhcp/common/lpf.c index 4deecf85f24f..9e566849f749 100644 --- a/contrib/isc-dhcp/common/lpf.c +++ b/contrib/isc-dhcp/common/lpf.c @@ -43,7 +43,7 @@ #ifndef lint static char copyright[] = -"$Id: lpf.c,v 1.1.2.8 1999/03/29 22:07:13 mellon Exp $ Copyright (c) 1995, 1996, 1998, 1999 The Internet Software Consortium. All rights reserved.\n"; +"$Id: lpf.c,v 1.1.2.9 1999/05/27 17:44:52 mellon Exp $ Copyright (c) 1995, 1996, 1998, 1999 The Internet Software Consortium. All rights reserved.\n"; #endif /* not lint */ #include "dhcpd.h" @@ -59,6 +59,9 @@ static char copyright[] = #include "includes/netinet/udp.h" #include "includes/netinet/if_ether.h" +static void lpf_gen_filter_setup PROTO ((struct interface_info *)); +static void lpf_tr_filter_setup PROTO ((struct interface_info *)); + /* Reinitializes the specified interface after an address change. This is not required for packet-filter APIs. */ @@ -149,15 +152,36 @@ void if_register_send (info) in bpf includes... */ extern struct sock_filter dhcp_bpf_filter []; extern int dhcp_bpf_filter_len; +extern struct sock_filter dhcp_bpf_tr_filter []; +extern int dhcp_bpf_tr_filter_len; void if_register_receive (info) struct interface_info *info; { - struct sock_fprog p; - /* Open a LPF device and hang it on this interface... */ info -> rfdesc = if_register_lpf (info); + if (info -> hw_address.htype == HTYPE_IEEE802) + lpf_tr_filter_setup (info); + else + lpf_gen_filter_setup (info); + + if (!quiet_interface_discovery) + note ("Listening on LPF/%s/%s%s%s", + info -> name, + print_hw_addr (info -> hw_address.htype, + info -> hw_address.hlen, + info -> hw_address.haddr), + (info -> shared_network ? "/" : ""), + (info -> shared_network ? + info -> shared_network -> name : "")); +} + +static void lpf_gen_filter_setup (info) + struct interface_info *info; +{ + struct sock_fprog p; + /* Set up the bpf filter program structure. This is defined in bpf.c */ p.len = dhcp_bpf_filter_len; @@ -178,15 +202,35 @@ void if_register_receive (info) "in your kernel configuration"); error ("Can't install packet filter program: %m"); } - if (!quiet_interface_discovery) - note ("Listening on LPF/%s/%s%s%s", - info -> name, - print_hw_addr (info -> hw_address.htype, - info -> hw_address.hlen, - info -> hw_address.haddr), - (info -> shared_network ? "/" : ""), - (info -> shared_network ? - info -> shared_network -> name : "")); +} + +static void lpf_tr_filter_setup (info) + struct interface_info *info; +{ + struct sock_fprog p; + + /* Set up the bpf filter program structure. This is defined in + bpf.c */ + p.len = dhcp_bpf_tr_filter_len; + p.filter = dhcp_bpf_tr_filter; + + /* Patch the server port into the LPF program... + XXX changes to filter program may require changes + XXX to the insn number(s) used below! + XXX Token ring filter is null - when/if we have a filter + XXX that's not, we'll need this code. + XXX dhcp_bpf_filter [?].k = ntohs (local_port); */ + + if (setsockopt (info -> rfdesc, SOL_SOCKET, SO_ATTACH_FILTER, &p, + sizeof p) < 0) { + if (errno == ENOPROTOOPT || errno == EPROTONOSUPPORT || + errno == ESOCKTNOSUPPORT || errno == EPFNOSUPPORT || + errno == EAFNOSUPPORT) + error ("socket: %m - make sure %s %s!", + "CONFIG_PACKET and CONFIG_FILTER are defined", + "in your kernel configuration"); + error ("Can't install packet filter program: %m"); + } } #endif /* USE_LPF_RECEIVE */ |