diff options
Diffstat (limited to 'networking/udhcp/options.c')
| -rw-r--r-- | networking/udhcp/options.c | 30 |
1 files changed, 15 insertions, 15 deletions
diff --git a/networking/udhcp/options.c b/networking/udhcp/options.c index 1bdf257..d75bc5a 100644 --- a/networking/udhcp/options.c +++ b/networking/udhcp/options.c @@ -1,8 +1,8 @@ -/* - * options.c -- DHCP server option packet tools +/* + * options.c -- DHCP server option packet tools * Rewrite by Russ Dill <Russ.Dill@asu.edu> July 2001 */ - + #include <stdlib.h> #include <string.h> @@ -64,7 +64,7 @@ uint8_t *get_option(struct dhcpMessage *packet, int code) int i, length; uint8_t *optionptr; int over = 0, done = 0, curr = OPTION_FIELD; - + optionptr = packet->options; i = 0; length = 308; @@ -79,7 +79,7 @@ uint8_t *get_option(struct dhcpMessage *packet, int code) return NULL; } return optionptr + i + 2; - } + } switch (optionptr[i + OPT_CODE]) { case DHCP_PADDING: i++; @@ -114,10 +114,10 @@ uint8_t *get_option(struct dhcpMessage *packet, int code) /* return the position of the 'end' option (no bounds checking) */ -int end_option(uint8_t *optionptr) +int end_option(uint8_t *optionptr) { int i = 0; - + while (optionptr[i] != DHCP_END) { if (optionptr[i] == DHCP_PADDING) i++; else i += optionptr[i + OPT_LEN] + 2; @@ -131,7 +131,7 @@ int end_option(uint8_t *optionptr) int add_option_string(uint8_t *optionptr, uint8_t *string) { int end = end_option(optionptr); - + /* 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]); @@ -162,12 +162,12 @@ int add_simple_option(uint8_t *optionptr, uint8_t code, uint32_t data) if (dhcp_options[i].code == code) { length = option_lengths[dhcp_options[i].flags & TYPE_MASK]; } - + if (!length) { DEBUG(LOG_ERR, "Could not add option 0x%02x", code); return 0; } - + option[OPT_CODE] = code; option[OPT_LEN] = length; @@ -202,7 +202,7 @@ void attach_option(struct option_set **opt_list, struct dhcp_option *option, cha 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 = realloc(existing->data, existing->data[OPT_LEN] + length + 2); memcpy(existing->data + existing->data[OPT_LEN] + 2, buffer, length); existing->data[OPT_LEN] += length; @@ -210,19 +210,19 @@ void attach_option(struct option_set **opt_list, struct dhcp_option *option, cha } /* 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; + *curr = new; } } |