diff options
Diffstat (limited to 'networking/udhcp/files.c')
| -rw-r--r-- | networking/udhcp/files.c | 48 |
1 files changed, 47 insertions, 1 deletions
diff --git a/networking/udhcp/files.c b/networking/udhcp/files.c index 73a3bbc..33cd25a 100644 --- a/networking/udhcp/files.c +++ b/networking/udhcp/files.c @@ -15,8 +15,8 @@ #include "static_leases.h" #include "dhcpd.h" -#include "files.h" #include "options.h" +#include "files.h" #include "common.h" /* @@ -93,6 +93,52 @@ static int read_yn(const char *line, void *arg) } +/* 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; + } +} + /* read a dhcp option and add it to opt_list */ static int read_opt(const char *const_line, void *arg) { |