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Incremental changes to support DHCP protocol

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This commit is contained in:
Ted Lemon
1996-02-21 15:16:18 +00:00
parent 7e24ffd3ef
commit 685963dcf4
22 changed files with 590 additions and 316 deletions
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143
server/confpars.c
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@@ -102,9 +102,9 @@ void parse_statement (cfile)
parsed_time = parse_timestamp (cfile, &bc);
}
break;
case RANGE:
case SUBNET:
if (!setjmp (bc)) {
parse_address_range (cfile, &bc);
parse_subnet_statement (cfile, &bc);
}
break;
default:
@@ -209,6 +209,113 @@ char *parse_host_name (cfile, bc)
return s;
}
/* subnet_statement :== SUBNET net NETMASK netmask declarations SEMI
host_declarations :== <nil> | host_declaration
| host_declarations host_declaration SEMI */
struct subnet *parse_subnet_statement (cfile, bc)
FILE *cfile;
jmp_buf *bc;
{
char *val;
int token;
struct subnet *subnet;
struct iaddr net, netmask;
unsigned char addr [4];
int len = sizeof addr;
subnet = new_subnet ("parse_subnet_statement");
if (!subnet)
error ("No memory for new subnet");
subnet -> leases = (struct lease *)0;
subnet -> last_lease = (struct lease *)0;
subnet -> next = (struct subnet *)0;
subnet -> default_lease_time = default_lease_time;
subnet -> max_lease_time = max_lease_time;
/* Get the network number... */
parse_numeric_aggregate (cfile, bc, addr, &len, DOT, 10, 8);
memcpy (net.iabuf, addr, len);
net.len = len;
subnet -> net = net;
token = next_token (&val, cfile);
if (token != NETMASK) {
parse_warn ("Expecting netmask");
skip_to_semi (cfile);
longjmp (*bc, 1);
}
/* Get the netmask... */
parse_numeric_aggregate (cfile, bc, addr, &len, DOT, 10, 8);
memcpy (netmask.iabuf, addr, len);
netmask.len = len;
subnet -> netmask = netmask;
enter_subnet (subnet);
do {
token = peek_token (&val, cfile);
if (token == SEMI) {
token = next_token (&val, cfile);
break;
}
parse_subnet_decl (cfile, bc, subnet);
} while (1);
return subnet;
}
/* subnet_declaration :== hardware_declaration | filename_declaration
| fixed_addr_declaration | option_declaration */
void parse_subnet_decl (cfile, bc, decl)
FILE *cfile;
jmp_buf *bc;
struct subnet *decl;
{
char *val;
int token;
token = next_token (&val, cfile);
switch (token) {
case RANGE:
parse_address_range (cfile, bc, decl);
break;
case OPTION:
parse_option_decl (cfile, bc, decl -> options);
break;
case DEFAULT_LEASE_TIME:
token = next_token (&val, cfile);
if (token != NUMBER) {
parse_warn ("Expecting numeric default lease time");
skip_to_semi (cfile);
longjmp (*bc, 1);
}
convert_num ((unsigned char *)&decl -> default_lease_time,
val, 10, 4);
break;
case MAX_LEASE_TIME:
token = next_token (&val, cfile);
if (token != NUMBER) {
parse_warn ("Expecting numeric max lease time");
skip_to_semi (cfile);
longjmp (*bc, 1);
}
convert_num ((unsigned char *)&decl -> max_lease_time,
val, 10, 4);
break;
default:
parse_warn ("expecting a subnet declaration.");
skip_to_semi (cfile);
longjmp (*bc, 1);
break;
}
}
/* host_declaration :== hardware_declaration | filename_declaration
| fixed_addr_declaration | option_declaration */
@@ -232,7 +339,7 @@ void parse_host_decl (cfile, bc, decl)
parse_fixed_addr_decl (cfile, bc, decl);
break;
case OPTION:
parse_option_decl (cfile, bc, decl);
parse_option_decl (cfile, bc, decl -> options);
break;
case CIADDR:
decl -> ciaddr =
@@ -400,10 +507,10 @@ void parse_fixed_addr_decl (cfile, bc, decl)
would be painful to come up with BNF for it. However, it always
starts as above. */
void parse_option_decl (cfile, bc, decl)
void parse_option_decl (cfile, bc, options)
FILE *cfile;
jmp_buf *bc;
struct host_decl *decl;
struct tree_cache **options;
{
char *val;
int token;
@@ -570,11 +677,11 @@ void parse_option_decl (cfile, bc, decl)
}
} while (*fmt == 'A');
if (decl -> options [option -> code]) {
if (options [option -> code]) {
parse_warn ("duplicate option code %d (%s).",
option -> code, option -> name);
}
decl -> options [option -> code] = tree_cache (tree);
options [option -> code] = tree_cache (tree);
}
/* timestamp :== TIMESTAMP date SEMI
@@ -724,13 +831,14 @@ struct lease *parse_lease_statement (cfile, bc)
return &lease;
}
/* address_range :== RANGE ip_address ip_address ip_address SEMI */
/* address_range :== RANGE ip_address ip_address */
void parse_address_range (cfile, bc)
void parse_address_range (cfile, bc, subnet)
FILE *cfile;
jmp_buf *bc;
struct subnet *subnet;
{
struct iaddr low, high, mask;
struct iaddr low, high;
unsigned char addr [4];
int len = sizeof addr;
int token;
@@ -746,21 +854,8 @@ void parse_address_range (cfile, bc)
memcpy (high.iabuf, addr, len);
high.len = len;
/* Get the netmask of the subnet containing the range... */
parse_numeric_aggregate (cfile, bc, addr, &len, DOT, 10, 8);
memcpy (mask.iabuf, addr, len);
mask.len = len;
/* Snarf the semi... */
token = next_token (&val, cfile);
if (token != SEMI) {
parse_warn ("semicolon expected");
skip_to_semi (cfile);
longjmp (*bc, 1);
}
/* Create the new address range... */
new_address_range (low, high, mask);
new_address_range (low, high, subnet);
}
/* date :== NUMBER NUMBER/NUMBER/NUMBER NUMBER:NUMBER:NUMBER