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udhcpc: support for -O <option>.

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Two important notes:
* nissrv and nisdomain are not requested by default anymore!
* inconsistency between "XXXsvr" and "XXsrv" in option names resolved,
  all are "XXXsrv" now.

function                                             old     new   delta
udhcpc_main                                         2494    2600    +106
packed_usage                                       23023   23067     +44
add_requests                                          91     119     +28
static.udhcpc_longopts                               209     226     +17
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 4/0 up/down: 195/0)             Total: 195 bytes
This commit is contained in:
Denis Vlasenko 2007-12-10 07:03:38 +00:00
parent 75aa615bef
commit 191836845e
5 changed files with 97 additions and 78 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
include/usage.h
View File

@ -3840,7 +3840,7 @@ USE_FEATURE_RUN_PARTS_FANCY("\n -l Prints names of all matching files even when
#define udhcpc_trivial_usage \
"[-Cfbnqtv] [-c CID] [-V VCLS] [-H HOSTNAME] [-i INTERFACE]\n" \
" [-p pidfile] [-r IP] [-s script]"
" [-p pidfile] [-r IP] [-s script] [-O dhcp-option]..."
#define udhcpc_full_usage \
USE_GETOPT_LONG( \
" -V,--vendorclass=CLASSID Vendor class identifier" \
@ -3860,6 +3860,7 @@ USE_FEATURE_RUN_PARTS_FANCY("\n -l Prints names of all matching files even when
"\n -n,--now Exit with failure if lease is not immediately obtained" \
"\n -q,--quit Quit after obtaining lease" \
"\n -R,--release Release IP on quit" \
"\n -O,--request-option=OPT Request DHCP option OPT from server" \
USE_FEATURE_UDHCPC_ARPING( \
"\n -a,--arping Use arping to validate offered address" \
) \
@ -3882,6 +3883,7 @@ USE_FEATURE_RUN_PARTS_FANCY("\n -l Prints names of all matching files even when
"\n -n Exit with failure if lease is not immediately obtained" \
"\n -q Quit after obtaining lease" \
"\n -R Release IP on quit" \
"\n -O OPT Request DHCP option OPT from server" \
USE_FEATURE_UDHCPC_ARPING( \
"\n -a Use arping to validate offered address" \
) \

11
networking/udhcp/clientpacket.c
View File

@ -57,13 +57,18 @@ static void init_packet(struct dhcpMessage *packet, char type)
* goes towards the head of the packet. */
static void add_requests(struct dhcpMessage *packet)
{
uint8_t c;
int end = end_option(packet->options);
int i, len = 0;
packet->options[end + OPT_CODE] = DHCP_PARAM_REQ;
for (i = 0; dhcp_options[i].code; i++)
if (dhcp_options[i].flags & OPTION_REQ)
packet->options[end + OPT_DATA + len++] = dhcp_options[i].code;
for (i = 0; (c = dhcp_options[i].code) != 0; i++) {
if (dhcp_options[i].flags & OPTION_REQ
|| (client_config.opt_mask[c >> 3] & (1 << (c & 7)))
) {
packet->options[end + OPT_DATA + len++] = c;
}
}
packet->options[end + OPT_LEN] = len;
packet->options[end + OPT_DATA + len] = DHCP_END;

21
networking/udhcp/dhcpc.c
View File

@ -133,6 +133,7 @@ int udhcpc_main(int argc, char **argv)
{
uint8_t *temp, *message;
char *str_c, *str_V, *str_h, *str_F, *str_r, *str_T, *str_A, *str_t;
llist_t *list_O = NULL;
#if ENABLE_FEATURE_UDHCPC_ARPING
char *str_W;
#endif
@ -205,6 +206,7 @@ int udhcpc_main(int argc, char **argv)
#if ENABLE_FEATURE_UDHCPC_ARPING
"arping\0" No_argument "a"
#endif
"request-option\0" Required_argument "O"
;
#endif
/* Default options. */
@ -212,16 +214,18 @@ int udhcpc_main(int argc, char **argv)
client_config.script = DEFAULT_SCRIPT;
/* Parse command line */
opt_complementary = "c--C:C--c"; // mutually exclusive
opt_complementary = "c--C:C--c:O::"; // Cc: mutually exclusive; O: list
#if ENABLE_GETOPT_LONG
applet_long_options = udhcpc_longopts;
#endif
opt = getopt32(argv, "c:CV:fbH:h:F:i:np:qRr:s:T:t:vSA:"
USE_FEATURE_UDHCPC_ARPING("aW:")
, &str_c, &str_V, &str_h, &str_h, &str_F,
&client_config.interface, &client_config.pidfile, &str_r,
&client_config.script, &str_T, &str_t, &str_A
"O:"
, &str_c, &str_V, &str_h, &str_h, &str_F
, &client_config.interface, &client_config.pidfile, &str_r
, &client_config.script, &str_T, &str_t, &str_A
USE_FEATURE_UDHCPC_ARPING(, &str_W)
, &list_O
);
if (opt & OPT_c)
@ -268,11 +272,18 @@ int udhcpc_main(int argc, char **argv)
puts("version "BB_VER);
return 0;
}
if (opt & OPT_S) {
openlog(applet_name, LOG_PID, LOG_LOCAL0);
logmode |= LOGMODE_SYSLOG;
}
while (list_O) {
int n = index_in_strings(dhcp_option_strings, list_O->data);
if (n < 0)
bb_error_msg_and_die("unknown option '%s'", list_O->data);
n = dhcp_options[n].code;
client_config.opt_mask[n >> 3] |= 1 << (n & 7);
list_O = list_O->link;
}
if (read_interface(client_config.interface, &client_config.ifindex,
NULL, client_config.arp))

1
networking/udhcp/dhcpc.h
View File

@ -30,6 +30,7 @@ struct client_config_t {
uint8_t *fqdn; /* Optional fully qualified domain name to use */
int ifindex; /* Index number of the interface to use */
uint8_t arp[6]; /* Our arp address */
uint8_t opt_mask[256 / 8]; /* Bitmask of options to send (-O option) */
};
#define client_config (*(struct client_config_t*)&bb_common_bufsiz1)

54
networking/udhcp/options.c
View File

@ -29,25 +29,25 @@ const struct dhcp_option dhcp_options[] = {
{ 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 , 0x28 }, /* nisdomain */
{ 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 }, /* dhcptype */
{ 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" */
{ OPTION_STRING , 0x42 }, /* tftp */
{ OPTION_STRING , 0x43 }, /* bootfile */
{ OPTION_STRING , 0x4D }, /* userclass */
#if ENABLE_FEATURE_RFC3397
{ OPTION_STR1035 | OPTION_LIST | OPTION_REQ, 0x77 }, /* "search" */
{ OPTION_STR1035 | OPTION_LIST , 0x77 }, /* search */
#endif
/* MSIE's "Web Proxy Autodiscovery Protocol" support */
{ OPTION_STRING, 0xfc }, /* "wpad" */
{ OPTION_STRING , 0xfc }, /* wpad */
/* Options below have no match in dhcp_option_strings[],
* are not passed to dhcpc scripts, and cannot be specified
@ -64,28 +64,28 @@ 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 */
"timesrv" "\0" /* DHCP_TIME_SERVER */
"namesrv" "\0" /* DHCP_NAME_SERVER */
"dns" "\0" /* DHCP_DNS_SERVER */
"logsvr" "\0" /* DHCP_LOG_SERVER */
"cookiesvr" "\0" /* DHCP_COOKIE_SERVER */
"lprsvr" "\0" /* DHCP_LPR_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 */
"swapsvr" "\0" /* DHCP_SWAP_SERVER */
"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_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 */
"nisdomain" "\0" /* */
"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 */