diff options
Diffstat (limited to 'networking/udhcp/options.c')
| -rw-r--r-- | networking/udhcp/options.c | 262 |
1 files changed, 0 insertions, 262 deletions
diff --git a/networking/udhcp/options.c b/networking/udhcp/options.c deleted file mode 100644 index af3c217..0000000 --- a/networking/udhcp/options.c +++ /dev/null @@ -1,262 +0,0 @@ -/* vi: set sw=4 ts=4: */ -/* - * options.c -- DHCP server option packet tools - * Rewrite by Russ Dill <Russ.Dill@asu.edu> July 2001 - * - * Licensed under GPLv2, see file LICENSE in this tarball for details. - */ - -#include "common.h" - - -/* Supported options are easily added here. - * See RFC2132 for more options. - * OPTION_REQ: these options are requested by udhcpc (unless -o). - */ -const struct dhcp_option dhcp_options[] = { - /* flags code */ - { OPTION_IP | OPTION_REQ, 0x01 }, /* DHCP_SUBNET */ - { OPTION_S32 , 0x02 }, /* DHCP_TIME_OFFSET */ - { OPTION_IP | OPTION_LIST | OPTION_REQ, 0x03 }, /* DHCP_ROUTER */ -// { OPTION_IP | OPTION_LIST , 0x04 }, /* DHCP_TIME_SERVER */ -// { OPTION_IP | OPTION_LIST , 0x05 }, /* DHCP_NAME_SERVER */ - { OPTION_IP | OPTION_LIST | OPTION_REQ, 0x06 }, /* DHCP_DNS_SERVER */ -// { OPTION_IP | OPTION_LIST , 0x07 }, /* DHCP_LOG_SERVER */ -// { OPTION_IP | OPTION_LIST , 0x08 }, /* DHCP_COOKIE_SERVER */ - { OPTION_IP | OPTION_LIST , 0x09 }, /* DHCP_LPR_SERVER */ - { OPTION_STRING | OPTION_REQ, 0x0c }, /* DHCP_HOST_NAME */ - { OPTION_U16 , 0x0d }, /* DHCP_BOOT_SIZE */ - { OPTION_STRING | OPTION_REQ, 0x0f }, /* DHCP_DOMAIN_NAME */ - { OPTION_IP , 0x10 }, /* DHCP_SWAP_SERVER */ - { OPTION_STRING , 0x11 }, /* DHCP_ROOT_PATH */ - { OPTION_U8 , 0x17 }, /* DHCP_IP_TTL */ - { OPTION_U16 , 0x1a }, /* DHCP_MTU */ - { OPTION_IP | OPTION_REQ, 0x1c }, /* DHCP_BROADCAST */ - { OPTION_STRING , 0x28 }, /* DHCP_NIS_DOMAIN */ - { OPTION_IP | OPTION_LIST , 0x29 }, /* DHCP_NIS_SERVER */ - { OPTION_IP | OPTION_LIST | OPTION_REQ, 0x2a }, /* DHCP_NTP_SERVER */ - { OPTION_IP | OPTION_LIST , 0x2c }, /* DHCP_WINS_SERVER */ - { OPTION_U32 , 0x33 }, /* DHCP_LEASE_TIME */ - { OPTION_IP , 0x36 }, /* DHCP_SERVER_ID */ - { OPTION_STRING , 0x38 }, /* DHCP_ERR_MESSAGE */ -//TODO: must be combined with 'sname' and 'file' handling: - { OPTION_STRING , 0x42 }, /* DHCP_TFTP_SERVER_NAME */ - { OPTION_STRING , 0x43 }, /* DHCP_BOOT_FILE */ -//TODO: not a string, but a set of LASCII strings: -// { OPTION_STRING , 0x4D }, /* DHCP_USER_CLASS */ -#if ENABLE_FEATURE_UDHCP_RFC3397 - { OPTION_STR1035 | OPTION_LIST , 0x77 }, /* DHCP_DOMAIN_SEARCH */ -#endif - { OPTION_STATIC_ROUTES , 0x79 }, /* DHCP_STATIC_ROUTES */ - { OPTION_STRING , 0xfc }, /* DHCP_WPAD */ - - /* Options below have no match in dhcp_option_strings[], - * are not passed to dhcpc scripts, and cannot be specified - * with "option XXX YYY" syntax in dhcpd config file. - * These entries are only used internally by udhcp[cd] - * to correctly encode options into packets. - */ - - { OPTION_IP , 0x32 }, /* DHCP_REQUESTED_IP */ - { OPTION_U8 , 0x35 }, /* DHCP_MESSAGE_TYPE */ - { OPTION_U16 , 0x39 }, /* DHCP_MAX_SIZE */ - { OPTION_STRING , 0x3c }, /* DHCP_VENDOR */ -//FIXME: handling of this option is not exactly correct: - { OPTION_STRING , 0x3d }, /* DHCP_CLIENT_ID */ - { 0, 0 } /* zeroed terminating entry */ -}; - -/* Used for converting options from incoming packets to env variables - * for udhcpc stript, and for setting options for udhcpd via - * "opt OPTION_NAME OPTION_VALUE" directives in udhcpd.conf file. - */ -/* Must match dhcp_options[] order */ -const char dhcp_option_strings[] ALIGN1 = - "subnet" "\0" /* DHCP_SUBNET */ - "timezone" "\0" /* DHCP_TIME_OFFSET */ - "router" "\0" /* DHCP_ROUTER */ -// "timesrv" "\0" /* DHCP_TIME_SERVER */ -// "namesrv" "\0" /* DHCP_NAME_SERVER */ - "dns" "\0" /* DHCP_DNS_SERVER */ -// "logsrv" "\0" /* DHCP_LOG_SERVER */ -// "cookiesrv" "\0" /* DHCP_COOKIE_SERVER */ - "lprsrv" "\0" /* DHCP_LPR_SERVER */ - "hostname" "\0" /* DHCP_HOST_NAME */ - "bootsize" "\0" /* DHCP_BOOT_SIZE */ - "domain" "\0" /* DHCP_DOMAIN_NAME */ - "swapsrv" "\0" /* DHCP_SWAP_SERVER */ - "rootpath" "\0" /* DHCP_ROOT_PATH */ - "ipttl" "\0" /* DHCP_IP_TTL */ - "mtu" "\0" /* DHCP_MTU */ - "broadcast" "\0" /* DHCP_BROADCAST */ - "nisdomain" "\0" /* DHCP_NIS_DOMAIN */ - "nissrv" "\0" /* DHCP_NIS_SERVER */ - "ntpsrv" "\0" /* DHCP_NTP_SERVER */ - "wins" "\0" /* DHCP_WINS_SERVER */ - "lease" "\0" /* DHCP_LEASE_TIME */ - "serverid" "\0" /* DHCP_SERVER_ID */ - "message" "\0" /* DHCP_ERR_MESSAGE */ - "tftp" "\0" /* DHCP_TFTP_SERVER_NAME */ - "bootfile" "\0" /* DHCP_BOOT_FILE */ -// "userclass" "\0" /* DHCP_USER_CLASS */ -#if ENABLE_FEATURE_UDHCP_RFC3397 - "search" "\0" /* DHCP_DOMAIN_SEARCH */ -#endif -// "staticroutes" is only used to set udhcpc environment, it doesn't work -// in udhcpd.conf since OPTION_STATIC_ROUTES is not handled yet -// by "string->option" conversion code: - "staticroutes" "\0"/* DHCP_STATIC_ROUTES */ - "wpad" "\0" /* DHCP_WPAD */ - ; - -/* Lengths of the different option types */ -const uint8_t dhcp_option_lengths[] ALIGN1 = { - [OPTION_IP] = 4, - [OPTION_IP_PAIR] = 8, - [OPTION_BOOLEAN] = 1, - [OPTION_STRING] = 1, -#if ENABLE_FEATURE_UDHCP_RFC3397 - [OPTION_STR1035] = 1, -#endif - [OPTION_U8] = 1, - [OPTION_U16] = 2, - [OPTION_S16] = 2, - [OPTION_U32] = 4, - [OPTION_S32] = 4, - /* Just like OPTION_STRING, we use minimum length here */ - [OPTION_STATIC_ROUTES] = 5, -}; - - -#if defined CONFIG_UDHCP_DEBUG && CONFIG_UDHCP_DEBUG >= 2 -static void log_option(const char *pfx, const uint8_t *opt) -{ - if (dhcp_verbose >= 2) { - char buf[256 * 2 + 2]; - *bin2hex(buf, (void*) (opt + OPT_DATA), opt[OPT_LEN]) = '\0'; - bb_info_msg("%s: 0x%02x %s", pfx, opt[OPT_CODE], buf); - } -} -#else -# define log_option(pfx, opt) ((void)0) -#endif - -/* get an option with bounds checking (warning, result is not aligned). */ -uint8_t* FAST_FUNC udhcp_get_option(struct dhcp_packet *packet, int code) -{ - uint8_t *optionptr; - int len; - int rem; - int overload = 0; - enum { - FILE_FIELD101 = FILE_FIELD * 0x101, - SNAME_FIELD101 = SNAME_FIELD * 0x101, - }; - - /* option bytes: [code][len][data1][data2]..[dataLEN] */ - optionptr = packet->options; - rem = sizeof(packet->options); - while (1) { - if (rem <= 0) { - bb_error_msg("bad packet, malformed option field"); - return NULL; - } - if (optionptr[OPT_CODE] == DHCP_PADDING) { - rem--; - optionptr++; - continue; - } - if (optionptr[OPT_CODE] == DHCP_END) { - if ((overload & FILE_FIELD101) == FILE_FIELD) { - /* can use packet->file, and didn't look at it yet */ - overload |= FILE_FIELD101; /* "we looked at it" */ - optionptr = packet->file; - rem = sizeof(packet->file); - continue; - } - if ((overload & SNAME_FIELD101) == SNAME_FIELD) { - /* can use packet->sname, and didn't look at it yet */ - overload |= SNAME_FIELD101; /* "we looked at it" */ - optionptr = packet->sname; - rem = sizeof(packet->sname); - continue; - } - break; - } - len = 2 + optionptr[OPT_LEN]; - rem -= len; - if (rem < 0) - continue; /* complain and return NULL */ - - if (optionptr[OPT_CODE] == code) { - log_option("Option found", optionptr); - return optionptr + OPT_DATA; - } - - if (optionptr[OPT_CODE] == DHCP_OPTION_OVERLOAD) { - overload |= optionptr[OPT_DATA]; - /* fall through */ - } - optionptr += len; - } - - /* log3 because udhcpc uses it a lot - very noisy */ - log3("Option 0x%02x not found", code); - return NULL; -} - -/* return the position of the 'end' option (no bounds checking) */ -int FAST_FUNC udhcp_end_option(uint8_t *optionptr) -{ - int i = 0; - - while (optionptr[i] != DHCP_END) { - if (optionptr[i] != DHCP_PADDING) - i += optionptr[i + OPT_LEN] + OPT_DATA-1; - i++; - } - return i; -} - -/* add an option string to the options */ -/* option bytes: [code][len][data1][data2]..[dataLEN] */ -void FAST_FUNC udhcp_add_option_string(uint8_t *optionptr, uint8_t *string) -{ - unsigned len; - unsigned end = udhcp_end_option(optionptr); - - /* end position + string length + option code/length + end option */ - if (end + string[OPT_LEN] + 2 + 1 >= DHCP_OPTIONS_BUFSIZE) { - bb_error_msg("option 0x%02x did not fit into the packet", - string[OPT_CODE]); - return; - } - log_option("Adding option", string); - len = OPT_DATA + string[OPT_LEN]; - memcpy(optionptr + end, string, len); - optionptr[end + len] = DHCP_END; -} - -/* add a one to four byte option to a packet */ -void FAST_FUNC udhcp_add_simple_option(uint8_t *optionptr, uint8_t code, uint32_t data) -{ - const 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 = dhcp_option_lengths[dh->flags & OPTION_TYPE_MASK]; - option[OPT_LEN] = len; - if (BB_BIG_ENDIAN) - data <<= 8 * (4 - len); - /* Assignment is unaligned! */ - move_to_unaligned32(&option[OPT_DATA], data); - udhcp_add_option_string(optionptr, option); - return; - } - } - - bb_error_msg("can't add option 0x%02x", code); -} |