*/
//config:config UDHCPC6
-//config: bool "udhcp client for DHCPv6 (udhcpc6)"
-//config: default n # not yet ready
-//config: help
-//config: udhcpc6 is a DHCPv6 client
+//config: bool "udhcp client for DHCPv6 (udhcpc6)"
+//config: default n # not yet ready
+//config: depends on FEATURE_IPV6
+//config: help
+//config: udhcpc6 is a DHCPv6 client
//applet:IF_UDHCPC6(APPLET(udhcpc6, BB_DIR_USR_BIN, BB_SUID_DROP))
-//kbuild:lib-$(CONFIG_UDHCPC6) += d6_dhcpc.o d6_packet.o d6_socket.o common.o
+//kbuild:lib-$(CONFIG_UDHCPC6) += d6_dhcpc.o d6_packet.o d6_socket.o common.o socket.o signalpipe.o
#include <syslog.h>
#if ENABLE_LONG_OPTS
-static const char udhcpc_longopts[] ALIGN1 =
+static const char udhcpc6_longopts[] ALIGN1 =
"interface\0" Required_argument "i"
"now\0" No_argument "n"
"pidfile\0" Required_argument "p"
"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"
"no-default-options\0" No_argument "o"
"foreground\0" No_argument "f"
"background\0" No_argument "b"
- "broadcast\0" No_argument "B"
/// IF_FEATURE_UDHCPC_ARPING("arping\0" No_argument "a")
IF_FEATURE_UDHCP_PORT("client-port\0" Required_argument "P")
;
OPT_o = 1 << 12,
OPT_x = 1 << 13,
OPT_f = 1 << 14,
- OPT_B = 1 << 15,
/* The rest has variable bit positions, need to be clever */
- OPTBIT_B = 15,
+ OPTBIT_f = 14,
USE_FOR_MMU( OPTBIT_b,)
///IF_FEATURE_UDHCPC_ARPING(OPTBIT_a,)
IF_FEATURE_UDHCP_PORT( OPTBIT_P,)
int len_m4 = option_end - option - 4;
while (len_m4 >= 0) {
/* Next option's len is too big? */
- if (option[2] > len_m4)
+ if (option[3] > len_m4)
return NULL; /* yes. bogus packet! */
/* So far we treat any opts with code >255
* or len >255 as bogus, and stop at once.
* This simplifies big-endian handling.
*/
- if (option[1] != 0 || option[3] != 0)
+ if (option[0] != 0 || option[2] != 0)
return NULL;
/* Option seems to be valid */
/* Does its code match? */
- if (option[0] == code)
+ if (option[1] == code)
return option; /* yes! */
- option += option[2] + 4;
- len_m4 -= option[2] + 4;
+ option += option[3] + 4;
+ len_m4 -= option[3] + 4;
}
return NULL;
}
uint8_t *opt = d6_find_option(option, option_end, code);
if (!opt)
return opt;
- return memcpy(xmalloc(opt[2] + 4), opt, opt[2] + 4);
+ return memcpy(xmalloc(opt[3] + 4), opt, opt[3] + 4);
}
static void *d6_store_blob(void *dst, const void *src, unsigned len)
/*** Script execution code ***/
+static char** new_env(void)
+{
+ client6_data.env_ptr = xrealloc_vector(client6_data.env_ptr, 3, client6_data.env_idx);
+ return &client6_data.env_ptr[client6_data.env_idx++];
+}
+
/* put all the parameters into the environment */
-static char **fill_envp(struct d6_packet *packet
- UNUSED_PARAM
-)
+static void option_to_env(uint8_t *option, uint8_t *option_end)
{
- int envc;
- char **envp, **curr;
+ /* "length minus 4" */
+ int len_m4 = option_end - option - 4;
+ while (len_m4 >= 0) {
+ uint32_t v32;
+ char ipv6str[sizeof("ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff")];
+
+ if (option[0] != 0 || option[2] != 0)
+ break;
+
+ switch (option[1]) {
+ //case D6_OPT_CLIENTID:
+ //case D6_OPT_SERVERID:
+ case D6_OPT_IA_NA:
+ case D6_OPT_IA_PD:
+ option_to_env(option + 16, option + 4 + option[3]);
+ break;
+ //case D6_OPT_IA_TA:
+ case D6_OPT_IAADDR:
+/* 0 1 2 3
+ * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | OPTION_IAADDR | option-len |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | |
+ * | IPv6 address |
+ * | |
+ * | |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | preferred-lifetime |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | valid-lifetime |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ */
+ sprint_nip6(ipv6str, option + 4);
+ *new_env() = xasprintf("ipv6=%s", ipv6str);
+
+ move_from_unaligned32(v32, option + 4 + 16 + 4);
+ *new_env() = xasprintf("lease=%u", (unsigned)v32);
+ break;
+
+ //case D6_OPT_ORO:
+ //case D6_OPT_PREFERENCE:
+ //case D6_OPT_ELAPSED_TIME:
+ //case D6_OPT_RELAY_MSG:
+ //case D6_OPT_AUTH:
+ //case D6_OPT_UNICAST:
+ //case D6_OPT_STATUS_CODE:
+ //case D6_OPT_RAPID_COMMIT:
+ //case D6_OPT_USER_CLASS:
+ //case D6_OPT_VENDOR_CLASS:
+ //case D6_OPT_VENDOR_OPTS:
+ //case D6_OPT_INTERFACE_ID:
+ //case D6_OPT_RECONF_MSG:
+ //case D6_OPT_RECONF_ACCEPT:
+
+ case D6_OPT_IAPREFIX:
+/* 0 1 2 3
+ * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | OPTION_IAPREFIX | option-length |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | preferred-lifetime |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | valid-lifetime |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | prefix-length | |
+ * +-+-+-+-+-+-+-+-+ IPv6 prefix |
+ * | (16 octets) |
+ * | |
+ * | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | |
+ * +-+-+-+-+-+-+-+-+
+ */
+ //move_from_unaligned32(v32, option + 4 + 4);
+ //*new_env() = xasprintf("lease=%u", (unsigned)v32);
+
+ sprint_nip6(ipv6str, option + 4 + 4 + 1);
+ *new_env() = xasprintf("ipv6prefix=%s/%u", ipv6str, (unsigned)(option[4 + 4]));
+ }
+ option += 4 + option[3];
+ len_m4 -= 4 + option[3];
+ }
+}
-#define BITMAP unsigned
-#define BBITS (sizeof(BITMAP) * 8)
-#define BMASK(i) (1 << (i & (sizeof(BITMAP) * 8 - 1)))
-#define FOUND_OPTS(i) (found_opts[(unsigned)i / BBITS])
- ///BITMAP found_opts[256 / BBITS];
+static char **fill_envp(struct d6_packet *packet)
+{
+ char **envp, **curr;
- ///memset(found_opts, 0, sizeof(found_opts));
+ client6_data.env_ptr = NULL;
+ client6_data.env_idx = 0;
- /* We need 2 elements for:
- * "interface=IFACE"
- * terminating NULL
- */
- envc = 2;
+ *new_env() = xasprintf("interface=%s", client_config.interface);
- curr = envp = xzalloc(sizeof(envp[0]) * envc);
+ if (packet)
+ option_to_env(packet->d6_options, packet->d6_options + sizeof(packet->d6_options));
- *curr = xasprintf("interface=%s", client_config.interface);
- putenv(*curr++);
+ envp = curr = client6_data.env_ptr;
+ while (*curr)
+ putenv(*curr++);
return envp;
}
return d6_send_raw_packet(
packet, (end - (uint8_t*) packet),
- /*src*/ NULL, CLIENT_PORT,
- /*dst*/ (struct in6_addr*)FF02__1_2, SERVER_PORT, MAC_BCAST_ADDR,
+ /*src*/ NULL, CLIENT_PORT6,
+ /*dst*/ (struct in6_addr*)FF02__1_2, SERVER_PORT6, MAC_BCAST_ADDR,
client_config.ifindex
);
}
if (server_ipv6)
return d6_send_kernel_packet(
&packet, (opt_ptr - (uint8_t*) &packet),
- our_cur_ipv6, CLIENT_PORT,
- server_ipv6, SERVER_PORT
+ our_cur_ipv6, CLIENT_PORT6,
+ server_ipv6, SERVER_PORT6
);
return d6_mcast_from_client_config_ifindex(&packet, opt_ptr);
}
bb_info_msg("Sending release...");
return d6_send_kernel_packet(
&packet, (opt_ptr - (uint8_t*) &packet),
- our_cur_ipv6, CLIENT_PORT,
- server_ipv6, SERVER_PORT
+ our_cur_ipv6, CLIENT_PORT6,
+ server_ipv6, SERVER_PORT6
);
}
/* make sure its the right packet for us, and that it passes sanity checks */
if (packet.ip6.ip6_nxt != IPPROTO_UDP
|| (packet.ip6.ip6_vfc >> 4) != 6
- || packet.udp.dest != htons(CLIENT_PORT)
+ || packet.udp.dest != htons(CLIENT_PORT6)
/* || bytes > (int) sizeof(packet) - can't happen */
|| packet.udp.len != packet.ip6.ip6_plen
) {
BPF_STMT(BPF_LDX|BPF_B|BPF_MSH, 0),
/* load udp destination port from halfword[header_len + 2] */
BPF_STMT(BPF_LD|BPF_H|BPF_IND, 2),
- /* jump to L3 if udp dport is CLIENT_PORT, else to L4 */
+ /* jump to L3 if udp dport is CLIENT_PORT6, else to L4 */
BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, 68, 0, 1),
/* L3: accept packet */
BPF_STMT(BPF_RET|BPF_K, 0xffffffff),
xbind(fd, (struct sockaddr *) &sock, sizeof(sock));
#if 0
- if (CLIENT_PORT == 68) {
+ if (CLIENT_PORT6 == 546) {
/* Use only if standard port is in use */
/* Ignoring error (kernel may lack support for this) */
if (setsockopt(fd, SOL_SOCKET, SO_ATTACH_FILTER, &filter_prog,
sockfd = -1;
}
if (new_mode == LISTEN_KERNEL)
- sockfd = udhcp_listen_socket(/*INADDR_ANY,*/ CLIENT_PORT, client_config.interface);
+ sockfd = udhcp_listen_socket(/*INADDR_ANY,*/ CLIENT_PORT6, client_config.interface);
else if (new_mode != LISTEN_NONE)
sockfd = d6_raw_socket(client_config.ifindex);
/* else LISTEN_NONE: sockfd stays closed */
//usage:# define IF_UDHCP_VERBOSE(...)
//usage:#endif
//usage:#define udhcpc6_trivial_usage
-//usage: "[-fbnq"IF_UDHCP_VERBOSE("v")"oRB] [-i IFACE] [-r IP] [-s PROG] [-p PIDFILE]\n"
+//usage: "[-fbnq"IF_UDHCP_VERBOSE("v")"oR] [-i IFACE] [-r IP] [-s PROG] [-p PIDFILE]\n"
//usage: " [-x OPT:VAL]... [-O OPT]..." IF_FEATURE_UDHCP_PORT(" [-P N]")
//usage:#define udhcpc6_full_usage "\n"
//usage: IF_LONG_OPTS(
//usage: "\n -R,--release Release IP on exit"
//usage: "\n -S,--syslog Log to syslog too"
//usage: IF_FEATURE_UDHCP_PORT(
-//usage: "\n -P,--client-port N Use port N (default 68)"
+//usage: "\n -P,--client-port N Use port N (default 546)"
//usage: )
////usage: IF_FEATURE_UDHCPC_ARPING(
////usage: "\n -a,--arping Use arping to validate offered address"
//usage: "\n -R Release IP on exit"
//usage: "\n -S Log to syslog too"
//usage: IF_FEATURE_UDHCP_PORT(
-//usage: "\n -P N Use port N (default 68)"
+//usage: "\n -P N Use port N (default 546)"
//usage: )
////usage: IF_FEATURE_UDHCPC_ARPING(
////usage: "\n -a Use arping to validate offered address"
fd_set rfds;
/* Default options */
- IF_FEATURE_UDHCP_PORT(SERVER_PORT = 547;)
- IF_FEATURE_UDHCP_PORT(CLIENT_PORT = 546;)
+ IF_FEATURE_UDHCP_PORT(SERVER_PORT6 = 547;)
+ IF_FEATURE_UDHCP_PORT(CLIENT_PORT6 = 546;)
client_config.interface = "eth0";
client_config.script = CONFIG_UDHCPC_DEFAULT_SCRIPT;
/* Parse command line */
/* O,x: list; -T,-t,-A take numeric param */
opt_complementary = "O::x::T+:t+:A+" IF_UDHCP_VERBOSE(":vv") ;
- IF_LONG_OPTS(applet_long_options = udhcpc_longopts;)
- opt = getopt32(argv, "i:np:qRr:s:T:t:SA:O:ox:fB"
+ IF_LONG_OPTS(applet_long_options = udhcpc6_longopts;)
+ opt = getopt32(argv, "i:np:qRr:s:T:t:SA:O:ox:f"
USE_FOR_MMU("b")
///IF_FEATURE_UDHCPC_ARPING("a")
IF_FEATURE_UDHCP_PORT("P:")
, &list_x
IF_FEATURE_UDHCP_PORT(, &str_P)
IF_UDHCP_VERBOSE(, &dhcp_verbose)
- );
+ );
requested_ipv6 = NULL;
if (opt & OPT_r) {
if (inet_pton(AF_INET6, str_r, &ipv6_buf) <= 0)
}
#if ENABLE_FEATURE_UDHCP_PORT
if (opt & OPT_P) {
- CLIENT_PORT = xatou16(str_P);
- SERVER_PORT = CLIENT_PORT - 1;
+ CLIENT_PORT6 = xatou16(str_P);
+ SERVER_PORT6 = CLIENT_PORT6 + 1;
}
#endif
- if (opt & OPT_o)
- client_config.no_default_options = 1;
while (list_O) {
char *optstr = llist_pop(&list_O);
unsigned n = bb_strtou(optstr, NULL, 0);
}
client_config.opt_mask[n >> 3] |= 1 << (n & 7);
}
+ if (!(opt & OPT_o)) {
+ /*
+ unsigned i, n;
+ for (i = 0; (n = dhcp_optflags[i].code) != 0; i++) {
+ if (dhcp_optflags[i].flags & OPTION_REQ) {
+ client_config.opt_mask[n >> 3] |= 1 << (n & 7);
+ }
+ }
+ */
+ }
while (list_x) {
char *optstr = llist_pop(&list_x);
char *colon = strchr(optstr, ':');
clientid = xzalloc(2+2+2+2+6);
clientid->code = D6_OPT_CLIENTID;
clientid->len = 2+2+6;
- clientid->data[0] = 3; /* DUID-LL */
- clientid->data[2] = 1; /* ethernet */
+ clientid->data[1] = 3; /* DUID-LL */
+ clientid->data[3] = 1; /* ethernet */
clientid_mac_ptr = clientid->data + 2+2;
memcpy(clientid_mac_ptr, client_config.client_mac, 6);
client_config.clientid = (void*)clientid;
retval = 0;
/* If we already timed out, fall through with retval = 0, else... */
if ((int)tv.tv_sec > 0) {
+ log1("Waiting on select %u seconds", (int)tv.tv_sec);
timestamp_before_wait = (unsigned)monotonic_sec();
- log1("Waiting on select...");
retval = select(max_fd + 1, &rfds, NULL, NULL, &tv);
if (retval < 0) {
/* EINTR? A signal was caught, don't panic */
switch (state) {
case INIT_SELECTING:
- if (packet_num < discover_retries) {
+ if (!discover_retries || packet_num < discover_retries) {
if (packet_num == 0)
xid = random_xid();
/* multicast */
packet_num = 0;
continue;
case REQUESTING:
- if (packet_num < discover_retries) {
+ if (!discover_retries || packet_num < discover_retries) {
/* send multicast select packet */
send_d6_select(xid);
timeout = discover_timeout;
free(client6_data.ia_na);
client6_data.ia_na = d6_copy_option(packet.d6_options, packet_end, D6_OPT_IA_NA);
if (!client6_data.ia_na) {
- bb_error_msg("no lease time, ignoring packet");
+ bb_error_msg("no %s option, ignoring packet", "IA_NA");
continue;
}
if (client6_data.ia_na->len < (4 + 4 + 4) + (2 + 2 + 16 + 4 + 4)) {
bb_error_msg("IA_NA option is too short:%d bytes", client6_data.ia_na->len);
continue;
}
- iaaddr = d6_find_option(client6_data.ia_na->data,
+ iaaddr = d6_find_option(client6_data.ia_na->data + 4 + 4 + 4,
client6_data.ia_na->data + client6_data.ia_na->len,
D6_OPT_IAADDR
);
if (!iaaddr) {
- bb_error_msg("no lease time, ignoring packet");
+ bb_error_msg("no %s option, ignoring packet", "IAADDR");
continue;
}
if (iaaddr->len < (16 + 4 + 4)) {
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