[git commit] udhcp: add 100 and 101 dhcp options for ipv4

[Denys Vlasenko]

commit: https://git.busybox.net/busybox/commit/?id=0e7bd69bb58e0914f25e3543e6beb142a203738c
branch: https://git.busybox.net/busybox/commit/?id=refs/heads/master

Support for the IEEE timezone string and timezone database strings (100
and 101 options respectively) is added for ipv4, conforming to RFC-4833.

The two options are passed to hook scripts in the variables tzstr and
tzdbstr.

function                                             old     new   delta
dhcp_option_strings                                  280     294     +14
dhcp_optflags                                         76      80      +4
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 18/0)               Total: 18 bytes

Signed-off-by: Antoine Girard-Vallée <antoine.girard-vallee at savoirfairelinux.com>
Signed-off-by: Denys Vlasenko <vda.linux at googlemail.com>
---
 networking/udhcp/common.c | 4 ++++
 networking/udhcp/common.h | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/networking/udhcp/common.c b/networking/udhcp/common.c
index fc4de5716..59cf723ee 100644
--- a/networking/udhcp/common.c
+++ b/networking/udhcp/common.c
@@ -54,6 +54,8 @@ const struct dhcp_optflag dhcp_optflags[] = {
 	{ OPTION_STRING                           , 0x43 }, /* DHCP_BOOT_FILE     */
 //TODO: not a string, but a set of LASCII strings:
 //	{ OPTION_STRING                           , 0x4D }, /* DHCP_USER_CLASS    */
+	{ OPTION_STRING                           , 0x64 }, /* DHCP_PCODE         */
+	{ OPTION_STRING                           , 0x65 }, /* DHCP_TCODE         */
 #if ENABLE_FEATURE_UDHCP_RFC3397
 	{ OPTION_DNS_STRING | OPTION_LIST         , 0x77 }, /* DHCP_DOMAIN_SEARCH */
 	{ OPTION_SIP_SERVERS                      , 0x78 }, /* DHCP_SIP_SERVERS   */
@@ -121,6 +123,8 @@ const char dhcp_option_strings[] ALIGN1 =
 	"tftp" "\0"             /* DHCP_TFTP_SERVER_NAME*/
 	"bootfile" "\0"         /* DHCP_BOOT_FILE       */
 //	"userclass" "\0"        /* DHCP_USER_CLASS      */
+	"tzstr" "\0"            /* DHCP_PCODE           */
+	"tzdbstr" "\0"          /* DHCP_TCODE           */
 #if ENABLE_FEATURE_UDHCP_RFC3397
 	"search" "\0"           /* DHCP_DOMAIN_SEARCH   */
 // doesn't work in udhcpd.conf since OPTION_SIP_SERVERS
diff --git a/networking/udhcp/common.h b/networking/udhcp/common.h
index b68f9394e..9d1f71aae 100644
--- a/networking/udhcp/common.h
+++ b/networking/udhcp/common.h
@@ -149,6 +149,8 @@ enum {
 //#define DHCP_BOOT_FILE        0x43 /* 67: same as 'file' field */
 //#define DHCP_USER_CLASS       0x4d /* 77: RFC 3004. set of LASCII strings. "I am a printer" etc */
 #define DHCP_FQDN               0x51 /* 81: client asks to update DNS to map its FQDN to its new IP */
+//#define DHCP_PCODE            0x64 /* 100: RFC 4833. IEEE 1003.1 TZ string */
+//#define DHCP_TCODE            0x65 /* 101: RFC 4833. Reference to the TZ database string */
 //#define DHCP_DOMAIN_SEARCH    0x77 /* 119: RFC 3397. set of ASCIZ string, DNS-style compressed */
 //#define DHCP_SIP_SERVERS      0x78 /* 120: RFC 3361. flag byte, then: 0: domain names, 1: IP addrs */
 //#define DHCP_STATIC_ROUTES    0x79 /* 121: RFC 3442. (mask,ip,router) tuples */