BOOTP Protocol support. */
/*
- * Copyright (c) 1995, 1996 The Internet Software Consortium.
+ * Copyright (c) 1995, 1996, 1997, 1998 The Internet Software Consortium.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
#ifndef lint
static char copyright[] =
-"$Id: bootp.c,v 1.30 1998/03/17 06:18:06 mellon Exp $ Copyright (c) 1995, 1996 The Internet Software Consortium. All rights reserved.\n";
+"$Id: bootp.c,v 1.31 1998/06/25 03:41:03 mellon Exp $ Copyright (c) 1995, 1996 The Internet Software Consortium. All rights reserved.\n";
#endif /* not lint */
#include "dhcpd.h"
struct sockaddr_in to;
struct in_addr from;
struct hardware hto;
- struct tree_cache *options [256];
+ struct option_state options;
struct subnet *subnet;
struct lease *lease;
struct iaddr ip_address;
int i;
+ struct data_string d1;
if (packet -> raw -> op != BOOTREQUEST)
return;
}
}
- if (host && (!host -> group -> allow_booting)) {
- note ("Ignoring excluded BOOTP client %s",
- host -> name
- ? host -> name
- : print_hw_addr (packet -> raw -> htype,
- packet -> raw -> hlen,
- packet -> raw -> chaddr));
- return;
- }
-
- if (host && (!host -> group -> allow_bootp)) {
- note ("Ignoring BOOTP request from client %s",
- host -> name
- ? host -> name
- : print_hw_addr (packet -> raw -> htype,
- packet -> raw -> hlen,
- packet -> raw -> chaddr));
- return;
- }
-
- /* If we've been told not to boot unknown clients,
- and we didn't find any host record for this client,
- ignore it. */
- if (!host && !(packet -> shared_network ->
- group -> boot_unknown_clients)) {
- note ("Ignoring unknown BOOTP client %s via %s",
- print_hw_addr (packet -> raw -> htype,
- packet -> raw -> hlen,
- packet -> raw -> chaddr),
- packet -> raw -> giaddr.s_addr
- ? inet_ntoa (packet -> raw -> giaddr)
- : packet -> interface -> name);
- return;
- }
-
- /* If we've been told not to boot with bootp on this
- network, ignore it. */
- if (!host &&
- !(packet -> shared_network -> group -> allow_bootp)) {
- note ("Ignoring BOOTP request from client %s via %s",
- print_hw_addr (packet -> raw -> htype,
- packet -> raw -> hlen,
- packet -> raw -> chaddr),
- packet -> raw -> giaddr.s_addr
- ? inet_ntoa (packet -> raw -> giaddr)
- : packet -> interface -> name);
- return;
- }
-
- /* If the packet is from a host we don't know and there
- are no dynamic bootp addresses on the network it came
- in on, drop it on the floor. */
- if (!(packet -> shared_network -> group -> dynamic_bootp)) {
- lose:
- note ("No applicable record for BOOTP host %s via %s",
- print_hw_addr (packet -> raw -> htype,
- packet -> raw -> hlen,
- packet -> raw -> chaddr),
- packet -> raw -> giaddr.s_addr
- ? inet_ntoa (packet -> raw -> giaddr)
- : packet -> interface -> name);
- return;
- }
-
/* If a lease has already been assigned to this client
and it's still okay to use dynamic bootp on
that lease, reassign it. */
return;
}
}
- goto lose;
+ note ("No dynamic leases for BOOTP client %s",
+ print_hw_addr (packet -> raw -> htype,
+ packet -> raw -> hlen,
+ packet -> raw -> chaddr));
}
- /* Make sure we're allowed to boot this client. */
- if (hp && (!hp -> group -> allow_booting)) {
- note ("Ignoring excluded BOOTP client %s",
- hp -> name);
- return;
- }
-
- /* Make sure we're allowed to boot this client with bootp. */
- if (hp && (!hp -> group -> allow_bootp)) {
- note ("Ignoring BOOTP request from client %s",
- hp -> name);
- return;
+ /* Run the executable statements to compute the client and server
+ options. */
+
+ memset (&options, 0, sizeof options);
+
+ /* Execute the subnet statements. */
+ execute_statements_in_scope (packet, &options,
+ lease -> subnet -> group,
+ (struct group *)0);
+
+ /* Execute the host statements. */
+ execute_statements_in_scope (packet, &options, hp -> group,
+ lease -> subnet -> group);
+
+ /* Drop the request if it's not allowed for this client. */
+ if (options.server_options [SV_ALLOW_BOOTP]) {
+ d1 = evaluate_data_expression
+ (packet, (options.server_options
+ [SV_ALLOW_BOOTP] -> expression));
+ if (d1.len && !d1.data [0]) {
+ note ("Ignoring BOOTP client %s",
+ print_hw_addr (packet -> raw -> htype,
+ packet -> raw -> hlen,
+ packet -> raw -> chaddr));
+ return;
+ }
+ }
+
+ if (options.server_options [SV_ALLOW_BOOTING]) {
+ d1 = evaluate_data_expression
+ (packet, (options.server_options
+ [SV_ALLOW_BOOTING] -> expression));
+ if (d1.len && !d1.data [0]) {
+ note ("Declining to boot client %s",
+ lease -> host -> name
+ ? lease -> host -> name
+ : print_hw_addr (packet -> raw -> htype,
+ packet -> raw -> hlen,
+ packet -> raw -> chaddr));
+ return;
+ }
}
-
+
/* Set up the outgoing packet... */
memset (&outgoing, 0, sizeof outgoing);
memset (&raw, 0, sizeof raw);
packet -> raw -> options, DHCP_OPTION_LEN);
outgoing.packet_length = BOOTP_MIN_LEN;
} else {
- /* Come up with a list of options that we want to send
- to this client. Start with the per-subnet options,
- and then override those with client-specific
- options. */
-
- memcpy (options, subnet -> group -> options, sizeof options);
-
- for (i = 0; i < 256; i++) {
- if (hp -> group -> options [i])
- options [i] = hp -> group -> options [i];
- }
-
/* Pack the options into the buffer. Unlike DHCP, we
can't pack options into the filename and server
name buffers. */
outgoing.packet_length =
- cons_options (packet, outgoing.raw, 0, options,
- (struct agent_options *)0, 0, 0, 1);
+ cons_options (packet,
+ outgoing.raw, 0, &options, 0, 0, 1);
if (outgoing.packet_length < BOOTP_MIN_LEN)
outgoing.packet_length = BOOTP_MIN_LEN;
}
memcpy (&raw.yiaddr, ip_address.iabuf, sizeof raw.yiaddr);
/* Figure out the address of the next server. */
- if (hp && hp -> group -> next_server.len)
- memcpy (&raw.siaddr, hp -> group -> next_server.iabuf, 4);
- else if (subnet -> group -> next_server.len)
- memcpy (&raw.siaddr, subnet -> group -> next_server.iabuf, 4);
- else if (subnet -> interface_address.len)
- memcpy (&raw.siaddr, subnet -> interface_address.iabuf, 4);
- else
- raw.siaddr = packet -> interface -> primary_address;
+ raw.siaddr = lease -> shared_network -> interface -> primary_address;
+ i = SV_NEXT_SERVER;
+ if (options.server_options [i]) {
+ d1 = evaluate_data_expression
+ (packet, options.server_options [i] -> expression);
+ /* If there was more than one answer, take the first. */
+ if (d1.len >= 4 && d1.data)
+ memcpy (&raw.siaddr, d1.data, 4);
+ }
raw.giaddr = packet -> raw -> giaddr;
- if (hp -> group -> server_name) {
- strncpy (raw.sname, hp -> group -> server_name,
- (sizeof raw.sname) - 1);
- raw.sname [(sizeof raw.sname) - 1] = 0;
+
+ /* Figure out the filename. */
+ i = SV_FILENAME;
+ if (options.server_options [i]) {
+ d1 = evaluate_data_expression
+ (packet, options.server_options [i] -> expression);
+ memcpy (raw.file, d1.data,
+ d1.len > sizeof raw.file ? sizeof raw.file : d1.len);
+ if (sizeof raw.file > d1.len)
+ memset (&raw.file [d1.len],
+ 0, (sizeof raw.file) - d1.len);
}
- if (hp -> group -> filename) {
- strncpy (raw.file, hp -> group -> filename,
- (sizeof raw.file) - 1);
- raw.file [(sizeof raw.file) - 1] = 0;
+
+ /* Choose a server name as above. */
+ i = SV_SERVER_NAME;
+ if (options.server_options [i]) {
+ d1 = evaluate_data_expression
+ (packet, options.server_options [i] -> expression);
+ memcpy (raw.sname, d1.data,
+ d1.len > sizeof raw.sname ? sizeof raw.sname : d1.len);
+ if (sizeof raw.sname > d1.len)
+ memset (&raw.sname [d1.len],
+ 0, (sizeof raw.sname) - d1.len);
}
/* Set up the hardware destination address... */
projects / thirdparty / dhcp.git / commitdiff
