diff options
Diffstat (limited to 'networking/udhcp/options.c')
| -rw-r--r-- | networking/udhcp/options.c | 138 |
1 files changed, 92 insertions, 46 deletions
diff --git a/networking/udhcp/options.c b/networking/udhcp/options.c index ffc0ed127..c224f3670 100644 --- a/networking/udhcp/options.c +++ b/networking/udhcp/options.c @@ -11,54 +11,97 @@ /* Supported options are easily added here */ const struct dhcp_option dhcp_options[] = { - /* opt_name[12] flags code */ - {"subnet", OPTION_IP | OPTION_REQ, 0x01}, /* DHCP_SUBNET */ - {"timezone", OPTION_S32, 0x02}, /* DHCP_TIME_OFFSET */ - {"router", OPTION_IP | OPTION_LIST | OPTION_REQ, 0x03}, /* DHCP_ROUTER */ - {"timesvr", OPTION_IP | OPTION_LIST, 0x04}, /* DHCP_TIME_SERVER */ - {"namesvr", OPTION_IP | OPTION_LIST, 0x05}, /* DHCP_NAME_SERVER */ - {"dns", OPTION_IP | OPTION_LIST | OPTION_REQ, 0x06}, /* DHCP_DNS_SERVER */ - {"logsvr", OPTION_IP | OPTION_LIST, 0x07}, /* DHCP_LOG_SERVER */ - {"cookiesvr", OPTION_IP | OPTION_LIST, 0x08}, /* DHCP_COOKIE_SERVER */ - {"lprsvr", OPTION_IP | OPTION_LIST, 0x09}, /* DHCP_LPR_SERVER */ - {"hostname", OPTION_STRING | OPTION_REQ, 0x0c}, /* DHCP_HOST_NAME */ - {"bootsize", OPTION_U16, 0x0d}, /* DHCP_BOOT_SIZE */ - {"domain", OPTION_STRING | OPTION_LIST | OPTION_REQ, 0x0f}, /* DHCP_DOMAIN_NAME */ - {"swapsvr", OPTION_IP, 0x10}, /* DHCP_SWAP_SERVER */ - {"rootpath", OPTION_STRING, 0x11}, /* DHCP_ROOT_PATH */ - {"ipttl", OPTION_U8, 0x17}, /* DHCP_IP_TTL */ - {"mtu", OPTION_U16, 0x1a}, /* DHCP_MTU */ - {"broadcast", OPTION_IP | OPTION_REQ, 0x1c}, /* DHCP_BROADCAST */ - {"nisdomain", OPTION_STRING | OPTION_REQ, 0x28}, /* DHCP_NTP_SERVER */ - {"nissrv", OPTION_IP | OPTION_LIST | OPTION_REQ, 0x29}, /* DHCP_WINS_SERVER */ - {"ntpsrv", OPTION_IP | OPTION_LIST | OPTION_REQ, 0x2a}, /* DHCP_REQUESTED_IP */ - {"wins", OPTION_IP | OPTION_LIST, 0x2c}, /* DHCP_LEASE_TIME */ - {"requestip", OPTION_IP, 0x32}, /* DHCP_OPTION_OVER */ - {"lease", OPTION_U32, 0x33}, /* DHCP_MESSAGE_TYPE */ - {"dhcptype", OPTION_U8, 0x35}, /* DHCP_SERVER_ID */ - {"serverid", OPTION_IP, 0x36}, /* DHCP_PARAM_REQ */ - {"message", OPTION_STRING, 0x38}, /* DHCP_MESSAGE */ -// TODO: 1) some options should not be parsed & passed to script - -// maxsize sure should not, since it cannot appear in server responses! -// grep for opt_name is fix the mess. -// 2) Using fixed-sized char[] vector wastes space. - {"maxsize", OPTION_U16, 0x39}, /* DHCP_MAX_SIZE */ - {"vendorclass", OPTION_STRING, 0x3C}, /* DHCP_VENDOR */ - {"clientid", OPTION_STRING, 0x3D}, /* DHCP_CLIENT_ID */ - {"tftp", OPTION_STRING, 0x42}, - {"bootfile", OPTION_STRING, 0x43}, - {"userclass", OPTION_STRING, 0x4D}, + /* 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_LIST | 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 | OPTION_REQ, 0x28 }, /* DHCP_NTP_SERVER */ + { OPTION_IP | OPTION_LIST | OPTION_REQ, 0x29 }, /* DHCP_WINS_SERVER */ + { OPTION_IP | OPTION_LIST | OPTION_REQ, 0x2a }, /* DHCP_REQUESTED_IP */ + { OPTION_IP | OPTION_LIST, 0x2c }, /* DHCP_LEASE_TIME */ + { OPTION_IP, 0x32 }, /* DHCP_OPTION_OVER */ + { OPTION_U32, 0x33 }, /* DHCP_MESSAGE_TYPE */ + { OPTION_U8, 0x35 }, /* DHCP_SERVER_ID */ + { OPTION_IP, 0x36 }, /* DHCP_PARAM_REQ */ + { OPTION_STRING, 0x38 }, /* DHCP_MESSAGE */ + { OPTION_STRING, 0x3C }, /* DHCP_VENDOR */ + { OPTION_STRING, 0x3D }, /* DHCP_CLIENT_ID */ + { OPTION_STRING, 0x42 }, /* "tftp" */ + { OPTION_STRING, 0x43 }, /* "bootfile" */ + { OPTION_STRING, 0x4D }, /* "userclass" */ #if ENABLE_FEATURE_RFC3397 - {"search", OPTION_STR1035 | OPTION_LIST | OPTION_REQ, 0x77}, + { OPTION_STR1035 | OPTION_LIST | OPTION_REQ, 0x77 }, /* "search" */ #endif /* MSIE's "Web Proxy Autodiscovery Protocol" support */ - {"wpad", OPTION_STRING, 0xfc}, - {} /* zero-padded terminating entry */ + { OPTION_STRING, 0xfc }, /* "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. */ + + { OPTION_U16, 0x39 }, /* DHCP_MAX_SIZE */ + { } /* zeroed terminating entry */ }; +/* Used for converting options from incoming packets to env variables + * for udhcpc stript */ +/* Must match dhcp_options[] order */ +const char dhcp_option_strings[] ALIGN1 = + "subnet" "\0" /* DHCP_SUBNET */ + "timezone" "\0" /* DHCP_TIME_OFFSET */ + "router" "\0" /* DHCP_ROUTER */ + "timesvr" "\0" /* DHCP_TIME_SERVER */ + "namesvr" "\0" /* DHCP_NAME_SERVER */ + "dns" "\0" /* DHCP_DNS_SERVER */ + "logsvr" "\0" /* DHCP_LOG_SERVER */ + "cookiesvr" "\0" /* DHCP_COOKIE_SERVER */ + "lprsvr" "\0" /* DHCP_LPR_SERVER */ + "hostname" "\0" /* DHCP_HOST_NAME */ + "bootsize" "\0" /* DHCP_BOOT_SIZE */ + "domain" "\0" /* DHCP_DOMAIN_NAME */ + "swapsvr" "\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_NTP_SERVER */ + "nissrv" "\0" /* DHCP_WINS_SERVER */ + "ntpsrv" "\0" /* DHCP_REQUESTED_IP */ + "wins" "\0" /* DHCP_LEASE_TIME */ + "requestip" "\0" /* DHCP_OPTION_OVER */ + "lease" "\0" /* DHCP_MESSAGE_TYPE */ + "dhcptype" "\0" /* DHCP_SERVER_ID */ + "serverid" "\0" /* DHCP_PARAM_REQ */ + "message" "\0" /* DHCP_MESSAGE */ + "vendorclass" "\0" /* DHCP_VENDOR */ + "clientid" "\0" /* DHCP_CLIENT_ID */ + "tftp" "\0" + "bootfile" "\0" + "userclass" "\0" +#if ENABLE_FEATURE_RFC3397 + "search" "\0" +#endif + /* MSIE's "Web Proxy Autodiscovery Protocol" support */ + "wpad" "\0" + ; + /* Lengths of the different option types */ -const unsigned char option_lengths[] ALIGN1 = { +const uint8_t dhcp_option_lengths[] ALIGN1 = { [OPTION_IP] = 4, [OPTION_IP_PAIR] = 8, [OPTION_BOOLEAN] = 1, @@ -137,8 +180,10 @@ 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; + if (optionptr[i] == DHCP_PADDING) + i++; + else + i += optionptr[i + OPT_LEN] + 2; } return i; } @@ -173,10 +218,11 @@ int add_simple_option(uint8_t *optionptr, uint8_t code, uint32_t data) uint8_t option[6], len; option[OPT_CODE] = code; - len = option_lengths[dh->flags & TYPE_MASK]; + len = dhcp_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 + if (BB_BIG_ENDIAN) + data <<= 8 * (4 - len); + /* This memcpy is for processors which can't * handle a simple unaligned 32-bit assignment */ memcpy(&option[OPT_DATA], &data, 4); return add_option_string(optionptr, option); |