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-rw-r--r--include/usage.h4
-rw-r--r--networking/udhcp/clientpacket.c11
-rw-r--r--networking/udhcp/dhcpc.c61
-rw-r--r--networking/udhcp/dhcpc.h1
-rw-r--r--networking/udhcp/options.c98
5 files changed, 97 insertions, 78 deletions
diff --git a/include/usage.h b/include/usage.h
index f6506b4f8..12d2cefd9 100644
--- a/include/usage.h
+++ b/include/usage.h
@@ -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" \
) \
diff --git a/networking/udhcp/clientpacket.c b/networking/udhcp/clientpacket.c
index 406fe340a..54f3f0e49 100644
--- a/networking/udhcp/clientpacket.c
+++ b/networking/udhcp/clientpacket.c
@@ -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;
diff --git a/networking/udhcp/dhcpc.c b/networking/udhcp/dhcpc.c
index d8077f7e8..69c35ca50 100644
--- a/networking/udhcp/dhcpc.c
+++ b/networking/udhcp/dhcpc.c
@@ -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
@@ -183,28 +184,29 @@ int udhcpc_main(int argc, char **argv)
};
#if ENABLE_GETOPT_LONG
static const char udhcpc_longopts[] ALIGN1 =
- "clientid\0" Required_argument "c"
- "clientid-none\0" No_argument "C"
- "vendorclass\0" Required_argument "V"
- "foreground\0" No_argument "f"
- "background\0" No_argument "b"
- "hostname\0" Required_argument "H"
- "fqdn\0" Required_argument "F"
- "interface\0" Required_argument "i"
- "now\0" No_argument "n"
- "pidfile\0" Required_argument "p"
- "quit\0" No_argument "q"
- "release\0" No_argument "R"
- "request\0" Required_argument "r"
- "script\0" Required_argument "s"
- "timeout\0" Required_argument "T"
- "version\0" No_argument "v"
- "retries\0" Required_argument "t"
- "tryagain\0" Required_argument "A"
- "syslog\0" No_argument "S"
+ "clientid\0" Required_argument "c"
+ "clientid-none\0" No_argument "C"
+ "vendorclass\0" Required_argument "V"
+ "foreground\0" No_argument "f"
+ "background\0" No_argument "b"
+ "hostname\0" Required_argument "H"
+ "fqdn\0" Required_argument "F"
+ "interface\0" Required_argument "i"
+ "now\0" No_argument "n"
+ "pidfile\0" Required_argument "p"
+ "quit\0" No_argument "q"
+ "release\0" No_argument "R"
+ "request\0" Required_argument "r"
+ "script\0" Required_argument "s"
+ "timeout\0" Required_argument "T"
+ "version\0" No_argument "v"
+ "retries\0" Required_argument "t"
+ "tryagain\0" Required_argument "A"
+ "syslog\0" No_argument "S"
#if ENABLE_FEATURE_UDHCPC_ARPING
- "arping\0" No_argument "a"
+ "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))
diff --git a/networking/udhcp/dhcpc.h b/networking/udhcp/dhcpc.h
index c0172a84f..e818896c9 100644
--- a/networking/udhcp/dhcpc.h
+++ b/networking/udhcp/dhcpc.h
@@ -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)
diff --git a/networking/udhcp/options.c b/networking/udhcp/options.c
index c224f3670..12e566210 100644
--- a/networking/udhcp/options.c
+++ b/networking/udhcp/options.c
@@ -11,49 +11,49 @@
/* Supported options are easily added here */
const struct dhcp_option dhcp_options[] = {
- /* 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" */
+ /* 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 , 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 */
#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
* with "option XXX YYY" syntax in dhcpd config file. */
- { OPTION_U16, 0x39 }, /* DHCP_MAX_SIZE */
+ { OPTION_U16 , 0x39 }, /* DHCP_MAX_SIZE */
{ } /* zeroed terminating entry */
};
@@ -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 */
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-29 07:13:56 +0000