+/* vi: set sw=4 ts=4: */
/*
* options.c -- DHCP server option packet tools
* Rewrite by Russ Dill <Russ.Dill@asu.edu> July 2001
#include <stdlib.h>
#include <string.h>
+#include "common.h"
#include "dhcpd.h"
-#include "files.h"
#include "options.h"
-#include "common.h"
+#include "files.h"
/* supported options are easily added here */
{"ipttl", OPTION_U8, 0x17},
{"mtu", OPTION_U16, 0x1a},
{"broadcast", OPTION_IP | OPTION_REQ, 0x1c},
- {"ntpsrv", OPTION_IP | OPTION_LIST, 0x2a},
+ {"nisdomain", OPTION_STRING | OPTION_REQ, 0x28},
+ {"nissrv", OPTION_IP | OPTION_LIST | OPTION_REQ, 0x29},
+ {"ntpsrv", OPTION_IP | OPTION_LIST | OPTION_REQ, 0x2a},
{"wins", OPTION_IP | OPTION_LIST, 0x2c},
{"requestip", OPTION_IP, 0x32},
{"lease", OPTION_U32, 0x33},
length = 308;
while (!done) {
if (i >= length) {
- LOG(LOG_WARNING, "bogus packet, option fields too long.");
+ bb_error_msg("Bogus packet, option fields too long");
return NULL;
}
if (optionptr[i + OPT_CODE] == code) {
if (i + 1 + optionptr[i + OPT_LEN] >= length) {
- LOG(LOG_WARNING, "bogus packet, option fields too long.");
+ bb_error_msg("Bogus packet, option fields too long");
return NULL;
}
return optionptr + i + 2;
break;
case DHCP_OPTION_OVER:
if (i + 1 + optionptr[i + OPT_LEN] >= length) {
- LOG(LOG_WARNING, "bogus packet, option fields too long.");
+ bb_error_msg("Bogus packet, option fields too long");
return NULL;
}
over = optionptr[i + 3];
/* end position + string length + option code/length + end option */
if (end + string[OPT_LEN] + 2 + 1 >= 308) {
- LOG(LOG_ERR, "Option 0x%02x did not fit into the packet!", string[OPT_CODE]);
+ bb_error_msg("Option 0x%02x did not fit into the packet",
+ string[OPT_CODE]);
return 0;
}
- DEBUG(LOG_INFO, "adding option 0x%02x", string[OPT_CODE]);
+ DEBUG("adding option 0x%02x", string[OPT_CODE]);
memcpy(optionptr + end, string, string[OPT_LEN] + 2);
optionptr[end + string[OPT_LEN] + 2] = DHCP_END;
return string[OPT_LEN] + 2;
/* add a one to four byte option to a packet */
int add_simple_option(uint8_t *optionptr, uint8_t code, uint32_t data)
{
- char length = 0;
- int i;
- uint8_t option[2 + 4];
- uint8_t *u8;
- uint16_t *u16;
- uint32_t *u32;
- uint32_t aligned;
- u8 = (uint8_t *) &aligned;
- u16 = (uint16_t *) &aligned;
- u32 = &aligned;
-
- for (i = 0; dhcp_options[i].code; i++)
- if (dhcp_options[i].code == code) {
- length = option_lengths[dhcp_options[i].flags & TYPE_MASK];
+ struct dhcp_option *dh;
+
+ for (dh=dhcp_options; dh->code; dh++) {
+ if (dh->code == code) {
+ uint8_t option[6], len;
+
+ option[OPT_CODE] = code;
+ len = option_lengths[dh->flags & TYPE_MASK];
+ option[OPT_LEN] = len;
+ if (BB_BIG_ENDIAN) data <<= 8 * (4 - len);
+ /* This memcpy is for broken processors which can't
+ * handle a simple unaligned 32-bit assignment */
+ memcpy(&option[OPT_DATA], &data, 4);
+ return add_option_string(optionptr, option);
}
-
- if (!length) {
- DEBUG(LOG_ERR, "Could not add option 0x%02x", code);
- return 0;
- }
-
- option[OPT_CODE] = code;
- option[OPT_LEN] = length;
-
- switch (length) {
- case 1: *u8 = data; break;
- case 2: *u16 = data; break;
- case 4: *u32 = data; break;
}
- memcpy(option + 2, &aligned, length);
- return add_option_string(optionptr, option);
-}
-
-/* find option 'code' in opt_list */
-struct option_set *find_option(struct option_set *opt_list, char code)
-{
- while (opt_list && opt_list->data[OPT_CODE] < code)
- opt_list = opt_list->next;
-
- if (opt_list && opt_list->data[OPT_CODE] == code) return opt_list;
- else return NULL;
-}
-
-
-/* add an option to the opt_list */
-void attach_option(struct option_set **opt_list, struct dhcp_option *option, char *buffer, int length)
-{
- struct option_set *existing, *new, **curr;
-
- /* add it to an existing option */
- if ((existing = find_option(*opt_list, option->code))) {
- DEBUG(LOG_INFO, "Attaching option %s to existing member of list", option->name);
- if (option->flags & OPTION_LIST) {
- if (existing->data[OPT_LEN] + length <= 255) {
- existing->data = realloc(existing->data,
- existing->data[OPT_LEN] + length + 2);
- memcpy(existing->data + existing->data[OPT_LEN] + 2, buffer, length);
- existing->data[OPT_LEN] += length;
- } /* else, ignore the data, we could put this in a second option in the future */
- } /* else, ignore the new data */
- } else {
- DEBUG(LOG_INFO, "Attaching option %s to list", option->name);
-
- /* make a new option */
- new = xmalloc(sizeof(struct option_set));
- new->data = xmalloc(length + 2);
- new->data[OPT_CODE] = option->code;
- new->data[OPT_LEN] = length;
- memcpy(new->data + 2, buffer, length);
-
- curr = opt_list;
- while (*curr && (*curr)->data[OPT_CODE] < option->code)
- curr = &(*curr)->next;
-
- new->next = *curr;
- *curr = new;
- }
+ bb_error_msg("Could not add option 0x%02x", code);
+ return 0;
}