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authorDenys Vlasenko <vda.linux@googlemail.com>2010-03-20 06:12:21 (GMT)
committer Denys Vlasenko <vda.linux@googlemail.com>2010-03-20 06:12:21 (GMT)
commit0f62c4d065bc7fa9d3de52a8482bf48ecfd18ecf (patch)
tree40a176b78edf6b6bc02cbca31d82892e1d23fe8e
parenta953987e778e1a89d9371df99b243e7b57b22a07 (diff)
downloadbusybox-0f62c4d065bc7fa9d3de52a8482bf48ecfd18ecf.tar.gz
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udhcpd: remove five more options which do not make sense or not supported
requestip, vendorclass, clientid are client-side variables, they do not make sense as udhcpd opts dhcptype is the packet type (not interesting, it's always 5) userclass needs parser support in order to work function old new delta dhcp_options 68 66 -2 read_opt 865 859 -6 dhcp_option_strings 253 203 -50 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-58) Total: -58 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
-rw-r--r--examples/udhcp/udhcpd.conf50
-rw-r--r--networking/udhcp/files.c3
-rw-r--r--networking/udhcp/options.c34
-rw-r--r--networking/udhcp/options.h14
-rw-r--r--networking/udhcp/script.c2
5 files changed, 58 insertions, 45 deletions
diff --git a/examples/udhcp/udhcpd.conf b/examples/udhcp/udhcpd.conf
index 1e05435..7fc37ab 100644
--- a/examples/udhcp/udhcpd.conf
+++ b/examples/udhcp/udhcpd.conf
@@ -63,27 +63,35 @@ option domain local
option lease 864000 # 10 days of seconds
# Currently supported options (for more info, see options.c):
-#opt subnet
-#opt timezone
-#opt router
-#opt timesrv
-#opt namesrv - obsolete, disabled
-#opt dns
-#opt logsrv
-#opt cookiesrv - rarely (never?) used, disabled
-#opt lprsrv
-#opt bootsize
-#opt domain
-#opt swapsrv
-#opt rootpath
-#opt ipttl
-#opt mtu
-#opt broadcast
-#opt wins
-#opt lease
-#opt ntpsrv
-#opt tftp
-#opt bootfile
+#opt lease NUM
+#opt subnet IP
+#opt broadcast IP
+#opt router IP_LIST
+#opt ipttl NUM
+#opt mtu NUM
+#opt hostname STRING - client's hostname
+#opt domain STRING - client's domain name
+#opt search STRING_LIST - search domains
+#opt nisdomain STRING
+#opt timezone NUM
+#opt tftp STRING - TFTP server name
+#opt bootfile STRING - file (kernel image) to load for booting
+#opt bootsize NUM - size of that file
+#opt rootpath STRING - (NFS) path to mount as root fs
+#opt wpad STRING
+#opt serverid IP - by default, server's IP
+#opt message STRING - error message (udhcpd sends it on success too)
+# Options specifying server(s)
+#opt dns IP_LIST
+#opt wins IP_LIST
+#opt nissrv IP_LIST
+#opt namesrv IP_LIST - obsolete, disabled
+#opt logsrv IP_LIST
+#opt cookiesrv IP_LIST - rarely (never?) used, disabled
+#opt lprsrv IP_LIST
+#opt swapsrv IP
+#opt timesrv IP_LIST
+#opt ntpsrv IP_LIST
# Static leases map
#static_lease 00:60:08:11:CE:4E 192.168.0.54
diff --git a/networking/udhcp/files.c b/networking/udhcp/files.c
index 1b2cc96..40cfe9f 100644
--- a/networking/udhcp/files.c
+++ b/networking/udhcp/files.c
@@ -201,9 +201,8 @@ static int FAST_FUNC read_opt(const char *const_line, void *arg)
#if ENABLE_FEATURE_UDHCP_RFC3397
case OPTION_STR1035:
#endif
- length = strlen(val);
+ length = strnlen(val, 254);
if (length > 0) {
- if (length > 254) length = 254;
opt = val;
retval = 1;
}
diff --git a/networking/udhcp/options.c b/networking/udhcp/options.c
index 6ab5708..c2a2305 100644
--- a/networking/udhcp/options.c
+++ b/networking/udhcp/options.c
@@ -11,7 +11,9 @@
#include "options.h"
-/* Supported options are easily added here. See RFC2132 */
+/* Supported options are easily added here.
+ * See RFC2132 for more options.
+ */
const struct dhcp_option dhcp_options[] = {
/* flags code */
{ OPTION_IP | OPTION_REQ, 0x01 }, /* DHCP_SUBNET */
@@ -25,7 +27,7 @@ const struct dhcp_option dhcp_options[] = {
{ 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_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 */
@@ -35,16 +37,13 @@ const struct dhcp_option dhcp_options[] = {
{ OPTION_IP | OPTION_LIST , 0x29 }, /* nissrv */
{ OPTION_IP | OPTION_LIST | OPTION_REQ, 0x2a }, /* DHCP_NTP_SERVER */
{ OPTION_IP | OPTION_LIST , 0x2c }, /* DHCP_WINS_SERVER */
- { OPTION_IP , 0x32 }, /* DHCP_REQUESTED_IP */
{ OPTION_U32 , 0x33 }, /* DHCP_LEASE_TIME */
- { OPTION_U8 , 0x35 }, /* DHCP_MESSAGE_TYPE */
{ OPTION_IP , 0x36 }, /* DHCP_SERVER_ID */
{ 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 */
+//TODO: not a string, but a set of LASCII strings:
+// { OPTION_STRING , 0x4D }, /* userclass */
#if ENABLE_FEATURE_UDHCP_RFC3397
{ OPTION_STR1035 | OPTION_LIST , 0x77 }, /* search */
#endif
@@ -54,14 +53,23 @@ const struct dhcp_option dhcp_options[] = {
/* 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. */
+ * 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 */
+ { OPTION_STRING , 0x3D }, /* DHCP_CLIENT_ID */
{ 0, 0 } /* zeroed terminating entry */
};
/* Used for converting options from incoming packets to env variables
- * for udhcpc stript */
+ * 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 */
@@ -85,19 +93,17 @@ const char dhcp_option_strings[] ALIGN1 =
"nissrv" "\0" /* */
"ntpsrv" "\0" /* DHCP_NTP_SERVER */
"wins" "\0" /* DHCP_WINS_SERVER */
- "requestip" "\0" /* DHCP_REQUESTED_IP */
"lease" "\0" /* DHCP_LEASE_TIME */
- "dhcptype" "\0" /* */
"serverid" "\0" /* DHCP_SERVER_ID */
"message" "\0" /* DHCP_MESSAGE */
- "vendorclass" "\0" /* DHCP_VENDOR */
- "clientid" "\0" /* DHCP_CLIENT_ID */
"tftp" "\0"
"bootfile" "\0"
- "userclass" "\0"
+// "userclass" "\0"
#if ENABLE_FEATURE_UDHCP_RFC3397
"search" "\0"
#endif
+// "staticroutes" is only used to set udhcpc environment, it doesn't work
+// in udhcpd.conf since OPTION_STATIC_ROUTES is not handled yet:
"staticroutes" "\0" /* DHCP_STATIC_ROUTES */
/* MSIE's "Web Proxy Autodiscovery Protocol" support */
"wpad" "\0"
diff --git a/networking/udhcp/options.h b/networking/udhcp/options.h
index 8f6ab0f..2d9c15f 100644
--- a/networking/udhcp/options.h
+++ b/networking/udhcp/options.h
@@ -41,10 +41,10 @@ enum {
#define DHCP_TIME_OFFSET 0x02
#define DHCP_ROUTER 0x03
#define DHCP_TIME_SERVER 0x04
-//#define DHCP_NAME_SERVER 0x05 /* _really_ ancient */
+//#define DHCP_NAME_SERVER 0x05 /* _really_ ancient kind of NS */
#define DHCP_DNS_SERVER 0x06
#define DHCP_LOG_SERVER 0x07
-//#define DHCP_COOKIE_SERVER 0x08 /* "quote of the day" */
+//#define DHCP_COOKIE_SERVER 0x08 /* "quote of the day" server */
#define DHCP_LPR_SERVER 0x09
#define DHCP_HOST_NAME 0x0c
#define DHCP_BOOT_SIZE 0x0d
@@ -56,18 +56,18 @@ enum {
#define DHCP_BROADCAST 0x1c
#define DHCP_NTP_SERVER 0x2a
#define DHCP_WINS_SERVER 0x2c
-#define DHCP_REQUESTED_IP 0x32
+#define DHCP_REQUESTED_IP 0x32 /* sent by client if specific IP is wanted */
#define DHCP_LEASE_TIME 0x33
#define DHCP_OPTION_OVERLOAD 0x34
#define DHCP_MESSAGE_TYPE 0x35
-#define DHCP_SERVER_ID 0x36
+#define DHCP_SERVER_ID 0x36 /* by default server's IP */
#define DHCP_PARAM_REQ 0x37
-#define DHCP_MESSAGE 0x38
+#define DHCP_MESSAGE 0x38 /* error message when sending NAK etc */
#define DHCP_MAX_SIZE 0x39
//#define DHCP_T1 0x3a
//#define DHCP_T2 0x3b
-#define DHCP_VENDOR 0x3c
-#define DHCP_CLIENT_ID 0x3d
+#define DHCP_VENDOR 0x3c /* client's vendor */
+#define DHCP_CLIENT_ID 0x3d /* by default client's MAC addr */
#define DHCP_FQDN 0x51
#define DHCP_STATIC_ROUTES 0x79
#define DHCP_END 0xFF
diff --git a/networking/udhcp/script.c b/networking/udhcp/script.c
index dc658ad..321b015 100644
--- a/networking/udhcp/script.c
+++ b/networking/udhcp/script.c
@@ -177,7 +177,7 @@ static NOINLINE char *xmalloc_optname_optval(uint8_t *option, const struct dhcp_
}
-/* put all the parameters into an environment */
+/* put all the parameters into the environment */
static char **fill_envp(struct dhcp_packet *packet)
{
int num_options = 0;