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dhcpc: let server know we don't like oversized packets.

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add TODO comment
This commit is contained in:
Denis Vlasenko
2007-11-28 19:23:12 +00:00
parent 41f5add965
commit 35ff74676b
6 changed files with 58 additions and 47 deletions
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68
networking/udhcp/options.c
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@@ -9,37 +9,42 @@
#include "options.h"
/* supported options are easily added here */
/* Supported options are easily added here */
const struct dhcp_option dhcp_options[] = {
/* name[12] flags code */
{"subnet", OPTION_IP | OPTION_REQ, 0x01},
{"timezone", OPTION_S32, 0x02},
{"router", OPTION_IP | OPTION_LIST | OPTION_REQ, 0x03},
{"timesvr", OPTION_IP | OPTION_LIST, 0x04},
{"namesvr", OPTION_IP | OPTION_LIST, 0x05},
{"dns", OPTION_IP | OPTION_LIST | OPTION_REQ, 0x06},
{"logsvr", OPTION_IP | OPTION_LIST, 0x07},
{"cookiesvr", OPTION_IP | OPTION_LIST, 0x08},
{"lprsvr", OPTION_IP | OPTION_LIST, 0x09},
{"hostname", OPTION_STRING | OPTION_REQ, 0x0c},
{"bootsize", OPTION_U16, 0x0d},
{"domain", OPTION_STRING | OPTION_LIST | OPTION_REQ, 0x0f},
{"swapsvr", OPTION_IP, 0x10},
{"rootpath", OPTION_STRING, 0x11},
{"ipttl", OPTION_U8, 0x17},
{"mtu", OPTION_U16, 0x1a},
{"broadcast", OPTION_IP | OPTION_REQ, 0x1c},
{"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},
{"dhcptype", OPTION_U8, 0x35},
{"serverid", OPTION_IP, 0x36},
{"message", OPTION_STRING, 0x38},
{"vendorclass", OPTION_STRING, 0x3C},
{"clientid", OPTION_STRING, 0x3D},
/* 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},
@@ -48,9 +53,10 @@ const struct dhcp_option dhcp_options[] = {
#endif
/* MSIE's "Web Proxy Autodiscovery Protocol" support */
{"wpad", OPTION_STRING, 0xfc},
{"", 0x00, 0x00}
{} /* zero-padded terminating entry */
};
/* Lengths of the different option types */
const unsigned char option_lengths[] ALIGN1 = {
[OPTION_IP] = 4,