At the cost of ~300 bytes, enables -P port option.
This feature is typically not needed.
-# TODO: UDHCP_DEBUG is inconvenient to use.
-# Make it controllable at runtime (say, via -v, -vv, -vvv)
-
config UDHCP_DEBUG
- bool "Compile udhcp with noisy debugging messages"
- default n
- depends on APP_UDHCPD || APP_UDHCPC
+ int "Maximum verbosity level for udhcp applets (0..3)"
+ default 0
+ range 0 3
+ depends on APP_UDHCPD || APP_UDHCPC || APP_DHCPRELAY
help
- If selected, udhcpd will output extra debugging output.
+ Verbosity can be increased with multiple -v options.
+ This options controls how high it can be cranked up.
+
+ Bigger values result in bigger code. Levels above 1
+ are very verbose and useful for debugging only.
config FEATURE_UDHCP_RFC3397
bool "Support for RFC3397 domain search (experimental)"
ret:
close(s);
- DEBUG("%srp reply received for this address", rv ? "No a" : "A");
+ log1("%srp reply received for this address", rv ? "No a" : "A");
return rv;
}
/* Returns -1 on errors that are fatal for the socket, -2 for those that aren't */
-int FAST_FUNC udhcp_recv_raw_packet(struct dhcpMessage *payload, int fd)
+int FAST_FUNC udhcp_recv_raw_packet(struct dhcpMessage *dhcp_pkt, int fd)
{
int bytes;
struct udp_dhcp_packet packet;
memset(&packet, 0, sizeof(packet));
bytes = safe_read(fd, &packet, sizeof(packet));
if (bytes < 0) {
- DEBUG("Cannot read on raw listening socket - ignoring");
+ log1("Packet read error, ignoring");
/* NB: possible down interface, etc. Caller should pause. */
return bytes; /* returns -1 */
}
if (bytes < (int) (sizeof(packet.ip) + sizeof(packet.udp))) {
- DEBUG("Packet is too short, ignoring");
+ log1("Packet is too short, ignoring");
return -2;
}
if (bytes < ntohs(packet.ip.tot_len)) {
/* packet is bigger than sizeof(packet), we did partial read */
- DEBUG("Oversized packet, ignoring");
+ log1("Oversized packet, ignoring");
return -2;
}
/* || bytes > (int) sizeof(packet) - can't happen */
|| ntohs(packet.udp.len) != (uint16_t)(bytes - sizeof(packet.ip))
) {
- DEBUG("Unrelated/bogus packet");
+ log1("Unrelated/bogus packet, ignoring");
return -2;
}
check = packet.ip.check;
packet.ip.check = 0;
if (check != udhcp_checksum(&packet.ip, sizeof(packet.ip))) {
- DEBUG("Bad IP header checksum, ignoring");
+ log1("Bad IP header checksum, ignoring");
return -2;
}
check = packet.udp.check;
packet.udp.check = 0;
if (check && check != udhcp_checksum(&packet, bytes)) {
- bb_error_msg("packet with bad UDP checksum received, ignoring");
+ log1("Packet with bad UDP checksum received, ignoring");
return -2;
}
- memcpy(payload, &packet.data, bytes - (sizeof(packet.ip) + sizeof(packet.udp)));
+ memcpy(dhcp_pkt, &packet.data, bytes - (sizeof(packet.ip) + sizeof(packet.udp)));
- if (payload->cookie != htonl(DHCP_MAGIC)) {
- bb_error_msg("received bogus message (bad magic), ignoring");
+ if (dhcp_pkt->cookie != htonl(DHCP_MAGIC)) {
+ bb_info_msg("Packet with bad magic, ignoring");
return -2;
}
- DEBUG("Got valid DHCP packet");
+ log1("Got valid DHCP packet");
+ udhcp_dump_packet(dhcp_pkt);
return bytes - (sizeof(packet.ip) + sizeof(packet.udp));
}
.filter = (struct sock_filter *) filter_instr,
};
- DEBUG("opening raw socket on ifindex %d", ifindex);
+ log1("Opening raw socket on ifindex %d", ifindex); //log2?
fd = xsocket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_IP));
- DEBUG("got raw socket fd %d", fd);
+ log1("Got raw socket fd %d", fd); //log2?
if (SERVER_PORT == 67 && CLIENT_PORT == 68) {
/* Use only if standard ports are in use */
/* Ignoring error (kernel may lack support for this) */
if (setsockopt(fd, SOL_SOCKET, SO_ATTACH_FILTER, &filter_prog,
sizeof(filter_prog)) >= 0)
- DEBUG("attached filter to raw socket fd %d", fd);
+ log1("Attached filter to raw socket fd %d", fd); // log?
}
sock.sll_family = AF_PACKET;
sock.sll_protocol = htons(ETH_P_IP);
sock.sll_ifindex = ifindex;
xbind(fd, (struct sockaddr *) &sock, sizeof(sock));
- DEBUG("bound to raw socket fd %d", fd);
+ log1("Created raw socket");
return fd;
}
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
-
#include "common.h"
+#if defined CONFIG_UDHCP_DEBUG && CONFIG_UDHCP_DEBUG >= 1
+int dhcp_verbose;
+#endif
+
const uint8_t MAC_BCAST_ADDR[6] ALIGN2 = {
0xff, 0xff, 0xff, 0xff, 0xff, 0xff
};
void udhcp_init_header(struct dhcpMessage *packet, char type) FAST_FUNC;
-/*int udhcp_recv_raw_packet(struct dhcpMessage *payload, int fd); - in dhcpc.h */
+/*int udhcp_recv_raw_packet(struct dhcpMessage *dhcp_pkt, int fd); - in dhcpc.h */
int udhcp_recv_kernel_packet(struct dhcpMessage *packet, int fd) FAST_FUNC;
-int udhcp_send_raw_packet(struct dhcpMessage *payload,
+int udhcp_send_raw_packet(struct dhcpMessage *dhcp_pkt,
uint32_t source_ip, int source_port,
uint32_t dest_ip, int dest_port, const uint8_t *dest_arp,
int ifindex) FAST_FUNC;
-int udhcp_send_kernel_packet(struct dhcpMessage *payload,
+int udhcp_send_kernel_packet(struct dhcpMessage *dhcp_pkt,
uint32_t source_ip, int source_port,
uint32_t dest_ip, int dest_port) FAST_FUNC;
uint8_t *from_mac,
const char *interface) FAST_FUNC;
-#if ENABLE_UDHCP_DEBUG
-# define DEBUG(str, args...) bb_info_msg("### " str, ## args)
+#if defined CONFIG_UDHCP_DEBUG && CONFIG_UDHCP_DEBUG >= 1
+extern int dhcp_verbose;
+# define log1(...) do { if (dhcp_verbose >= 1) bb_info_msg(__VA_ARGS__); } while (0)
+# if CONFIG_UDHCP_DEBUG >= 2
+void udhcp_dump_packet(struct dhcpMessage *packet) FAST_FUNC;
+# define log2(...) do { if (dhcp_verbose >= 2) bb_info_msg(__VA_ARGS__); } while (0)
+# else
+# define udhcp_dump_packet(...) ((void)0)
+# define log2(...) ((void)0)
+# endif
#else
-# define DEBUG(str, args...) do {;} while (0)
+# define udhcp_dump_packet(...) ((void)0)
+# define log1(...) ((void)0)
+# define log2(...) ((void)0)
#endif
POP_SAVED_FUNCTION_VISIBILITY
static int sockfd = -1;
-#define LISTEN_NONE 0
+#define LISTEN_NONE 0
#define LISTEN_KERNEL 1
-#define LISTEN_RAW 2
+#define LISTEN_RAW 2
static smallint listen_mode;
#define INIT_SELECTING 0
/* just a little helper */
static void change_listen_mode(int new_mode)
{
- DEBUG("entering %s listen mode",
+ log1("entering %s listen mode",
new_mode ? (new_mode == 1 ? "kernel" : "raw") : "none");
listen_mode = new_mode;
OPT_s = 1 << 12,
OPT_T = 1 << 13,
OPT_t = 1 << 14,
- OPT_v = 1 << 15,
- OPT_S = 1 << 16,
- OPT_A = 1 << 17,
- OPT_O = 1 << 18,
- OPT_o = 1 << 19,
- OPT_f = 1 << 20,
+ OPT_S = 1 << 15,
+ OPT_A = 1 << 16,
+ OPT_O = 1 << 17,
+ OPT_o = 1 << 18,
+ OPT_f = 1 << 19,
/* The rest has variable bit positions, need to be clever */
- OPTBIT_f = 20,
- USE_FOR_MMU( OPTBIT_b,)
+ OPTBIT_f = 19,
+ USE_FOR_MMU( OPTBIT_b,)
IF_FEATURE_UDHCPC_ARPING(OPTBIT_a,)
IF_FEATURE_UDHCP_PORT( OPTBIT_P,)
- USE_FOR_MMU( OPT_b = 1 << OPTBIT_b,)
+ USE_FOR_MMU( OPT_b = 1 << OPTBIT_b,)
IF_FEATURE_UDHCPC_ARPING(OPT_a = 1 << OPTBIT_a,)
IF_FEATURE_UDHCP_PORT( OPT_P = 1 << OPTBIT_P,)
};
/* Parse command line */
/* Cc: mutually exclusive; O: list; -T,-t,-A take numeric param */
- opt_complementary = "c--C:C--c:O::T+:t+:A+";
+ opt_complementary = "c--C:C--c:O::T+:t+:A+"
+#if defined CONFIG_UDHCP_DEBUG && CONFIG_UDHCP_DEBUG >= 1
+ ":vv"
+#endif
+ ;
IF_GETOPT_LONG(applet_long_options = udhcpc_longopts;)
- opt = getopt32(argv, "c:CV:H:h:F:i:np:qRr:s:T:t:vSA:O:of"
+ opt = getopt32(argv, "c:CV:H:h:F:i:np:qRr:s:T:t:SA:O:of"
USE_FOR_MMU("b")
IF_FEATURE_UDHCPC_ARPING("a")
IF_FEATURE_UDHCP_PORT("P:")
+ "v"
, &str_c, &str_V, &str_h, &str_h, &str_F
, &client_config.interface, &client_config.pidfile, &str_r /* i,p */
, &client_config.script /* s */
, &discover_timeout, &discover_retries, &tryagain_timeout /* T,t,A */
, &list_O
IF_FEATURE_UDHCP_PORT(, &str_P)
+#if defined CONFIG_UDHCP_DEBUG && CONFIG_UDHCP_DEBUG >= 1
+ , &dhcp_verbose
+#endif
);
if (opt & OPT_c)
client_config.clientid = alloc_dhcp_option(DHCP_CLIENT_ID, str_c, 0);
}
if (opt & OPT_r)
requested_ip = inet_addr(str_r);
- if (opt & OPT_v) {
- puts("version "BB_VER);
- return 0;
- }
#if ENABLE_FEATURE_UDHCP_PORT
if (opt & OPT_P) {
CLIENT_PORT = xatou16(str_P);
retval = 0; /* If we already timed out, fall through, else... */
if (tv.tv_sec > 0) {
timestamp_before_wait = (unsigned)monotonic_sec();
- DEBUG("Waiting on select...");
+ log1("Waiting on select...");
retval = select(max_fd + 1, &rfds, NULL, NULL, &tv);
if (retval < 0) {
/* EINTR? A signal was caught, don't panic */
case BOUND:
/* Half of the lease passed, time to enter renewing state */
change_listen_mode(LISTEN_KERNEL);
- DEBUG("Entering renew state");
+ log1("Entering renew state");
state = RENEWING;
/* fall right through */
case RENEWING:
continue;
}
/* Timed out, enter rebinding state */
- DEBUG("Entering rebinding state");
+ log1("Entering rebinding state");
state = REBINDING;
/* fall right through */
case REBINDING:
else
len = udhcp_recv_raw_packet(&packet, sockfd);
if (len == -1) { /* error is severe, reopen socket */
- DEBUG("error on read, %s, reopening socket", strerror(errno));
+ bb_info_msg("Read error: %s, reopening socket", strerror(errno));
sleep(discover_timeout); /* 3 seconds by default */
change_listen_mode(listen_mode); /* just close and reopen */
}
continue;
if (packet.xid != xid) {
- DEBUG("Ignoring xid %x (our xid is %x)",
+ log1("xid %x (our is %x), ignoring packet",
(unsigned)packet.xid, (unsigned)xid);
continue;
}
/* Ignore packets that aren't for us */
if (memcmp(packet.chaddr, client_config.client_mac, 6)) {
- DEBUG("Packet does not have our chaddr - ignoring");
+//FIXME: need to also check that last 10 bytes are zero
+ log1("chaddr does not match, ignoring packet"); // log2?
continue;
}
message = get_option(&packet, DHCP_MESSAGE_TYPE);
if (message == NULL) {
- bb_error_msg("cannot get message type from packet - ignoring");
+ bb_error_msg("no message type option, ignoring packet");
continue;
}
client_config.client_mac,
client_config.interface)
) {
- bb_info_msg("offered address is in use "
+ bb_info_msg("Offered address is in use "
"(got ARP reply), declining");
send_decline(xid, server_addr, packet.yiaddr);
PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
struct client_config_t {
- uint8_t client_mac[6]; /* Our arp address */
- /* TODO: combine flag fields into single "unsigned opt" */
- /* (can be set directly to the result of getopt32) */
- char no_default_options; /* Do not include default optins in request */
+ uint8_t client_mac[6]; /* Our mac address */
+ char no_default_options; /* Do not include default options in request */
IF_FEATURE_UDHCP_PORT(uint16_t port;)
int ifindex; /* Index number of the interface to use */
+ int verbose;
uint8_t opt_mask[256 / 8]; /* Bitmask of options to send (-O option) */
const char *interface; /* The name of the interface to use */
char *pidfile; /* Optionally store the process ID */
int send_renew(uint32_t xid, uint32_t server, uint32_t ciaddr) FAST_FUNC;
int send_release(uint32_t server, uint32_t ciaddr) FAST_FUNC;
-int udhcp_recv_raw_packet(struct dhcpMessage *payload, int fd) FAST_FUNC;
+int udhcp_recv_raw_packet(struct dhcpMessage *dhcp_pkt, int fd) FAST_FUNC;
POP_SAVED_FUNCTION_VISIBILITY
CLIENT_PORT = 68;
#endif
- opt = getopt32(argv, "fS" IF_FEATURE_UDHCP_PORT("P:", &str_P));
+#if defined CONFIG_UDHCP_DEBUG && CONFIG_UDHCP_DEBUG >= 1
+ opt_complementary = "vv";
+#endif
+ opt = getopt32(argv, "fSv"
+ IF_FEATURE_UDHCP_PORT("P:", &str_P)
+#if defined CONFIG_UDHCP_DEBUG && CONFIG_UDHCP_DEBUG >= 1
+ , &dhcp_verbose
+#endif
+ );
argv += optind;
if (!(opt & 1)) { /* no -f */
bb_daemonize_or_rexec(0, argv);
continue;
}
if (retval < 0 && errno != EINTR) {
- DEBUG("error on select");
+ log1("Error on select");
continue;
}
if (bytes < 0) {
/* bytes can also be -2 ("bad packet data") */
if (bytes == -1 && errno != EINTR) {
- DEBUG("error on read, %s, reopening socket", strerror(errno));
+ log1("Read error: %s, reopening socket", strerror(errno));
close(server_socket);
server_socket = -1;
}
state = get_option(&packet, DHCP_MESSAGE_TYPE);
if (state == NULL) {
- bb_error_msg("cannot get option from packet, ignoring");
+ bb_error_msg("no message type option, ignoring packet");
continue;
}
switch (state[0]) {
case DHCPDISCOVER:
- DEBUG("Received DISCOVER");
+ log1("Received DISCOVER");
if (send_offer(&packet) < 0) {
bb_error_msg("send OFFER failed");
}
break;
case DHCPREQUEST:
- DEBUG("received REQUEST");
+ log1("Received REQUEST");
requested = get_option(&packet, DHCP_REQUESTED_IP);
server_id = get_option(&packet, DHCP_SERVER_ID);
if (lease) {
if (server_id) {
/* SELECTING State */
- DEBUG("server_id = %08x", ntohl(server_id_aligned));
+ log1("server_id = %08x", ntohl(server_id_aligned));
if (server_id_aligned == server_config.server_nip
&& requested
&& requested_aligned == lease->lease_nip
}
break;
case DHCPDECLINE:
- DEBUG("Received DECLINE");
+ log1("Received DECLINE");
if (lease) {
memset(lease->lease_mac16, 0, 16);
lease->expires = time(NULL) + server_config.decline_time;
}
break;
case DHCPRELEASE:
- DEBUG("Received RELEASE");
+ log1("Received RELEASE");
if (lease)
lease->expires = time(NULL);
break;
case DHCPINFORM:
- DEBUG("Received INFORM");
+ log1("Received INFORM");
send_inform(&packet);
break;
default:
#endif
uint8_t server_mac[6]; /* our MAC address (used only for ARP probing) */
struct option_set *options; /* list of DHCP options loaded from the config file */
+ int verbose;
/* start,end are in host order: we need to compare start <= ip <= end */
uint32_t start_ip; /* start address of leases, in host order */
uint32_t end_ip; /* end of leases, in host order */
existing = find_option(*opt_list, option->code);
if (!existing) {
- DEBUG("Attaching option %02x to list", option->code);
+ log2("Attaching option %02x to list", option->code);
#if ENABLE_FEATURE_UDHCP_RFC3397
if ((option->flags & TYPE_MASK) == OPTION_STR1035)
}
/* add it to an existing option */
- DEBUG("Attaching option %02x to existing member of list", option->code);
+ log1("Attaching option %02x to existing member of list", option->code);
if (option->flags & OPTION_LIST) {
#if ENABLE_FEATURE_UDHCP_RFC3397
if ((option->flags & TYPE_MASK) == OPTION_STR1035)
struct dhcpOfferedAddr lease;
int64_t written_at, time_passed;
int fd;
- IF_UDHCP_DEBUG(unsigned i;)
+#if defined CONFIG_UDHCP_DEBUG && CONFIG_UDHCP_DEBUG >= 1
+ unsigned i = 0;
+#endif
fd = open_or_warn(file, O_RDONLY);
if (fd < 0)
if ((uint64_t)time_passed > 12 * 60 * 60)
goto ret;
- IF_UDHCP_DEBUG(i = 0;)
while (full_read(fd, &lease, sizeof(lease)) == sizeof(lease)) {
- /* ADDME: what if it matches some static lease? */
+//FIXME: what if it matches some static lease?
uint32_t y = ntohl(lease.lease_nip);
if (y >= server_config.start_ip && y <= server_config.end_ip) {
signed_leasetime_t expires = ntohl(lease.expires) - (signed_leasetime_t)time_passed;
bb_error_msg("too many leases while loading %s", file);
break;
}
- IF_UDHCP_DEBUG(i++;)
+#if defined CONFIG_UDHCP_DEBUG && CONFIG_UDHCP_DEBUG >= 1
+ i++;
+#endif
}
}
- DEBUG("Read %d leases", i);
+ log1("Read %d leases", i);
ret:
close(fd);
}
string[OPT_CODE]);
return 0;
}
- DEBUG("adding option 0x%02x", string[OPT_CODE]);
+ log1("Adding option 0x%02x", string[OPT_CODE]);
memcpy(optionptr + end, string, string[OPT_LEN] + 2);
optionptr[end + string[OPT_LEN] + 2] = DHCP_END;
return string[OPT_LEN] + 2;
*
* Licensed under GPLv2, see file LICENSE in this tarball for details.
*/
-
#include <netinet/in.h>
#if (defined(__GLIBC__) && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 1) || defined _NEWLIB_VERSION
#include <netpacket/packet.h>
#include "dhcpd.h"
#include "options.h"
-
void FAST_FUNC udhcp_init_header(struct dhcpMessage *packet, char type)
{
memset(packet, 0, sizeof(struct dhcpMessage));
add_simple_option(packet->options, DHCP_MESSAGE_TYPE, type);
}
+#if defined CONFIG_UDHCP_DEBUG && CONFIG_UDHCP_DEBUG >= 1
+void FAST_FUNC udhcp_dump_packet(struct dhcpMessage *packet)
+{
+ char buf[sizeof(packet->chaddr)*2 + 1];
+
+ if (dhcp_verbose < 2)
+ return;
+
+ bb_info_msg(
+ //" op %x"
+ //" htype %x"
+ " hlen %x"
+ //" hops %x"
+ " xid %x"
+ //" secs %x"
+ //" flags %x"
+ " ciaddr %x"
+ " yiaddr %x"
+ " siaddr %x"
+ " giaddr %x"
+ //" chaddr %s"
+ //" sname %s"
+ //" file %s"
+ //" cookie %x"
+ //" options %s"
+ //, packet->op
+ //, packet->htype
+ , packet->hlen
+ //, packet->hops
+ , packet->xid
+ //, packet->secs
+ //, packet->flags
+ , packet->ciaddr
+ , packet->yiaddr
+ , packet->siaddr_nip
+ , packet->gateway_nip
+ //, packet->chaddr[16]
+ //, packet->sname[64]
+ //, packet->file[128]
+ //, packet->cookie
+ //, packet->options[]
+ );
+ bin2hex(buf, (void *) packet->chaddr, sizeof(packet->chaddr));
+ bb_info_msg(" chaddr %s", buf);
+}
+#endif
-/* read a packet from socket fd, return -1 on read error, -2 on packet error */
+/* Read a packet from socket fd, return -1 on read error, -2 on packet error */
int FAST_FUNC udhcp_recv_kernel_packet(struct dhcpMessage *packet, int fd)
{
int bytes;
memset(packet, 0, sizeof(*packet));
bytes = safe_read(fd, packet, sizeof(*packet));
if (bytes < 0) {
- DEBUG("cannot read on listening socket, ignoring");
+ log1("Packet read error, ignoring");
return bytes; /* returns -1 */
}
if (packet->cookie != htonl(DHCP_MAGIC)) {
- bb_error_msg("received bogus message, ignoring");
+ bb_info_msg("Packet with bad magic, ignoring");
return -2;
}
- DEBUG("Received a packet");
+ log1("Received a packet");
+ udhcp_dump_packet(packet);
if (packet->op == BOOTREQUEST) {
vendor = get_option(packet, DHCP_VENDOR);
if (vendor[OPT_LEN - 2] == (uint8_t)strlen(broken_vendors[i])
&& !strncmp((char*)vendor, broken_vendors[i], vendor[OPT_LEN - 2])
) {
- DEBUG("broken client (%s), forcing broadcast replies",
+ log1("Broken client (%s), forcing broadcast replies",
broken_vendors[i]);
packet->flags |= htons(BROADCAST_FLAG);
}
if (vendor[OPT_LEN - 2] == (uint8_t)(sizeof("MSFT 98")-1)
&& memcmp(vendor, "MSFT 98", sizeof("MSFT 98")-1) == 0
) {
- DEBUG("broken client (%s), forcing broadcast replies", "MSFT 98");
+ log1("Broken client (%s), forcing broadcast replies", "MSFT 98");
packet->flags |= htons(BROADCAST_FLAG);
}
#endif
return bytes;
}
-
uint16_t FAST_FUNC udhcp_checksum(void *addr, int count)
{
/* Compute Internet Checksum for "count" bytes
- * beginning at location "addr".
+ * beginning at location "addr".
*/
int32_t sum = 0;
uint16_t *source = (uint16_t *) addr;
return ~sum;
}
-
/* Construct a ip/udp header for a packet, send packet */
-int FAST_FUNC udhcp_send_raw_packet(struct dhcpMessage *payload,
+int FAST_FUNC udhcp_send_raw_packet(struct dhcpMessage *dhcp_pkt,
uint32_t source_ip, int source_port,
uint32_t dest_ip, int dest_port, const uint8_t *dest_arp,
int ifindex)
memset(&dest, 0, sizeof(dest));
memset(&packet, 0, sizeof(packet));
- packet.data = *payload; /* struct copy */
+ packet.data = *dhcp_pkt; /* struct copy */
dest.sll_family = AF_PACKET;
dest.sll_protocol = htons(ETH_P_IP);
* If you need to change this: last byte of the packet is
* packet.data.options[end_option(packet.data.options)]
*/
+ udhcp_dump_packet(dhcp_pkt);
result = sendto(fd, &packet, IP_UPD_DHCP_SIZE, 0,
(struct sockaddr *) &dest, sizeof(dest));
msg = "sendto";
return result;
}
-
/* Let the kernel do all the work for packet generation */
-int FAST_FUNC udhcp_send_kernel_packet(struct dhcpMessage *payload,
+int FAST_FUNC udhcp_send_kernel_packet(struct dhcpMessage *dhcp_pkt,
uint32_t source_ip, int source_port,
uint32_t dest_ip, int dest_port)
{
}
/* Currently we send full-sized DHCP packets (see above) */
- result = safe_write(fd, payload, DHCP_SIZE);
+ udhcp_dump_packet(dhcp_pkt);
+ result = safe_write(fd, dhcp_pkt, DHCP_SIZE);
msg = "write";
ret_close:
close(fd);
if (client_config.script == NULL)
return;
- DEBUG("vfork'ing and exec'ing %s", client_config.script);
+ log1("Executing %s", client_config.script);
envp = fill_envp(packet);
/* send a packet to gateway_nip using the kernel ip stack */
-static int send_packet_to_relay(struct dhcpMessage *payload)
+static int send_packet_to_relay(struct dhcpMessage *dhcp_pkt)
{
- DEBUG("Forwarding packet to relay");
+ log1("Forwarding packet to relay");
- return udhcp_send_kernel_packet(payload,
+ return udhcp_send_kernel_packet(dhcp_pkt,
server_config.server_nip, SERVER_PORT,
- payload->gateway_nip, SERVER_PORT);
+ dhcp_pkt->gateway_nip, SERVER_PORT);
}
/* send a packet to a specific mac address and ip address by creating our own ip packet */
-static int send_packet_to_client(struct dhcpMessage *payload, int force_broadcast)
+static int send_packet_to_client(struct dhcpMessage *dhcp_pkt, int force_broadcast)
{
const uint8_t *chaddr;
uint32_t ciaddr;
// Was:
//if (force_broadcast) { /* broadcast */ }
- //else if (payload->ciaddr) { /* unicast to payload->ciaddr */ }
- //else if (payload->flags & htons(BROADCAST_FLAG)) { /* broadcast */ }
- //else { /* unicast to payload->yiaddr */ }
+ //else if (dhcp_pkt->ciaddr) { /* unicast to dhcp_pkt->ciaddr */ }
+ //else if (dhcp_pkt->flags & htons(BROADCAST_FLAG)) { /* broadcast */ }
+ //else { /* unicast to dhcp_pkt->yiaddr */ }
// But this is wrong: yiaddr is _our_ idea what client's IP is
// (for example, from lease file). Client may not know that,
// and may not have UDP socket listening on that IP!
- // We should never unicast to payload->yiaddr!
- // payload->ciaddr, OTOH, comes from client's request packet,
+ // We should never unicast to dhcp_pkt->yiaddr!
+ // dhcp_pkt->ciaddr, OTOH, comes from client's request packet,
// and can be used.
if (force_broadcast
- || (payload->flags & htons(BROADCAST_FLAG))
- || !payload->ciaddr
+ || (dhcp_pkt->flags & htons(BROADCAST_FLAG))
+ || !dhcp_pkt->ciaddr
) {
- DEBUG("broadcasting packet to client");
+ log1("Broadcasting packet to client");
ciaddr = INADDR_BROADCAST;
chaddr = MAC_BCAST_ADDR;
} else {
- DEBUG("unicasting packet to client ciaddr");
- ciaddr = payload->ciaddr;
- chaddr = payload->chaddr;
+ log1("Unicasting packet to client ciaddr");
+ ciaddr = dhcp_pkt->ciaddr;
+ chaddr = dhcp_pkt->chaddr;
}
- return udhcp_send_raw_packet(payload,
+ return udhcp_send_raw_packet(dhcp_pkt,
/*src*/ server_config.server_nip, SERVER_PORT,
/*dst*/ ciaddr, CLIENT_PORT, chaddr,
server_config.ifindex);
/* send a dhcp packet, if force broadcast is set, the packet will be broadcast to the client */
-static int send_packet(struct dhcpMessage *payload, int force_broadcast)
+static int send_packet(struct dhcpMessage *dhcp_pkt, int force_broadcast)
{
- if (payload->gateway_nip)
- return send_packet_to_relay(payload);
- return send_packet_to_client(payload, force_broadcast);
+ if (dhcp_pkt->gateway_nip)
+ return send_packet_to_relay(dhcp_pkt);
+ return send_packet_to_client(dhcp_pkt, force_broadcast);
}
init_packet(&packet, oldpacket, DHCPNAK);
- DEBUG("Sending NAK");
+ log1("Sending NAK");
return send_packet(&packet, 1);
}
}
our_ip = (struct sockaddr_in *) &ifr.ifr_addr;
*nip = our_ip->sin_addr.s_addr;
- DEBUG("ip of %s = %s", interface, inet_ntoa(our_ip->sin_addr));
+ log1("IP %s", inet_ntoa(our_ip->sin_addr));
}
if (ifindex) {
close(fd);
return -1;
}
- DEBUG("adapter index %d", ifr.ifr_ifindex);
+ log1("Adapter index %d", ifr.ifr_ifindex);
*ifindex = ifr.ifr_ifindex;
}
return -1;
}
memcpy(mac, ifr.ifr_hwaddr.sa_data, 6);
- DEBUG("adapter hardware address %02x:%02x:%02x:%02x:%02x:%02x",
+ log1("MAC %02x:%02x:%02x:%02x:%02x:%02x",
mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
}
int fd;
struct sockaddr_in addr;
- DEBUG("Opening listen socket on *:%d %s", port, inf);
+ log1("Opening listen socket on *:%d %s", port, inf);
fd = xsocket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
setsockopt_reuseaddr(fd);
projects / platform / upstream / busybox.git / commitdiff