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-rw-r--r--networking/udhcp/clientpacket.c7
-rw-r--r--networking/udhcp/common.h2
-rw-r--r--networking/udhcp/dhcpc.c15
-rw-r--r--networking/udhcp/dhcpc.h2
-rw-r--r--networking/udhcp/dhcpd.c7
-rw-r--r--networking/udhcp/dhcpd.h24
-rw-r--r--networking/udhcp/leases.c5
-rw-r--r--networking/udhcp/serverpacket.c2
-rw-r--r--networking/udhcp/socket.c8
9 files changed, 44 insertions, 28 deletions
diff --git a/networking/udhcp/clientpacket.c b/networking/udhcp/clientpacket.c
index 3f9522f..068f947 100644
--- a/networking/udhcp/clientpacket.c
+++ b/networking/udhcp/clientpacket.c
@@ -37,11 +37,11 @@ uint32_t FAST_FUNC random_xid(void)
}
-/* initialize a packet with the proper defaults */
+/* Initialize the packet with the proper defaults */
static void init_packet(struct dhcpMessage *packet, char type)
{
udhcp_init_header(packet, type);
- memcpy(packet->chaddr, client_config.arp, 6);
+ memcpy(packet->chaddr, client_config.client_mac, 6);
if (client_config.clientid)
add_option_string(packet->options, client_config.clientid);
if (client_config.hostname)
@@ -122,6 +122,7 @@ int FAST_FUNC send_decline(uint32_t xid, uint32_t server, uint32_t requested)
}
#endif
+
/* Broadcast a DHCP discover packet to the network, with an optionally requested IP */
int FAST_FUNC send_discover(uint32_t xid, uint32_t requested)
{
@@ -143,7 +144,7 @@ int FAST_FUNC send_discover(uint32_t xid, uint32_t requested)
}
-/* Broadcasts a DHCP request message */
+/* Broadcast a DHCP request message */
/* RFC 2131 3.1 paragraph 3:
* "The client _broadcasts_ a DHCPREQUEST message..."
*/
diff --git a/networking/udhcp/common.h b/networking/udhcp/common.h
index de784ad..91e8ccc 100644
--- a/networking/udhcp/common.h
+++ b/networking/udhcp/common.h
@@ -88,7 +88,7 @@ void udhcp_run_script(struct dhcpMessage *packet, const char *name) FAST_FUNC;
void udhcp_sp_setup(void) FAST_FUNC;
int udhcp_sp_fd_set(fd_set *rfds, int extra_fd) FAST_FUNC;
int udhcp_sp_read(const fd_set *rfds) FAST_FUNC;
-int udhcp_read_interface(const char *interface, int *ifindex, uint32_t *nip, uint8_t *arp) FAST_FUNC;
+int udhcp_read_interface(const char *interface, int *ifindex, uint32_t *nip, uint8_t *mac) FAST_FUNC;
int udhcp_raw_socket(int ifindex) FAST_FUNC;
int udhcp_listen_socket(/*uint32_t ip,*/ int port, const char *inf) FAST_FUNC;
/* Returns 1 if no reply received */
diff --git a/networking/udhcp/dhcpc.c b/networking/udhcp/dhcpc.c
index ab34b04..44ff197 100644
--- a/networking/udhcp/dhcpc.c
+++ b/networking/udhcp/dhcpc.c
@@ -273,9 +273,14 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
client_config.opt_mask[n >> 3] |= 1 << (n & 7);
}
- if (udhcp_read_interface(client_config.interface, &client_config.ifindex,
- NULL, client_config.arp))
+ if (udhcp_read_interface(client_config.interface,
+ &client_config.ifindex,
+ NULL,
+ client_config.client_mac)
+ ) {
return 1;
+ }
+
#if !BB_MMU
/* on NOMMU reexec (i.e., background) early */
if (!(opt & OPT_f)) {
@@ -303,7 +308,7 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
if (!client_config.clientid && !(opt & OPT_C)) {
client_config.clientid = alloc_dhcp_option(DHCP_CLIENT_ID, "", 7);
client_config.clientid[OPT_DATA] = 1;
- memcpy(client_config.clientid + OPT_DATA+1, client_config.arp, 6);
+ memcpy(client_config.clientid + OPT_DATA+1, client_config.client_mac, 6);
}
if (!client_config.vendorclass)
@@ -490,7 +495,7 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
}
/* Ignore packets that aren't for us */
- if (memcmp(packet.chaddr, client_config.arp, 6)) {
+ if (memcmp(packet.chaddr, client_config.client_mac, 6)) {
DEBUG("Packet does not have our chaddr - ignoring");
continue;
}
@@ -555,7 +560,7 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
if (!arpping(packet.yiaddr,
NULL,
(uint32_t) 0,
- client_config.arp,
+ client_config.client_mac,
client_config.interface)
) {
bb_info_msg("offered address is in use "
diff --git a/networking/udhcp/dhcpc.h b/networking/udhcp/dhcpc.h
index 361624f..861e134 100644
--- a/networking/udhcp/dhcpc.h
+++ b/networking/udhcp/dhcpc.h
@@ -6,7 +6,7 @@
PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
struct client_config_t {
- uint8_t arp[6]; /* Our arp address */
+ 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 */
diff --git a/networking/udhcp/dhcpd.c b/networking/udhcp/dhcpd.c
index 5993042..c74a11b 100644
--- a/networking/udhcp/dhcpd.c
+++ b/networking/udhcp/dhcpd.c
@@ -93,8 +93,11 @@ int udhcpd_main(int argc UNUSED_PARAM, char **argv)
leases = xzalloc(server_config.max_leases * sizeof(*leases));
read_leases(server_config.lease_file);
- if (udhcp_read_interface(server_config.interface, &server_config.ifindex,
- &server_config.server_nip, server_config.arp)) {
+ if (udhcp_read_interface(server_config.interface,
+ &server_config.ifindex,
+ &server_config.server_nip,
+ server_config.server_mac)
+ ) {
retval = 1;
goto ret;
}
diff --git a/networking/udhcp/dhcpd.h b/networking/udhcp/dhcpd.h
index 4774fd1..b233962 100644
--- a/networking/udhcp/dhcpd.h
+++ b/networking/udhcp/dhcpd.h
@@ -28,17 +28,23 @@ struct static_lease {
};
struct server_config_t {
- uint32_t server_nip; /* Our IP, in network order */
+ char *interface; /* interface to use */
+//TODO: ifindex, server_nip, server_mac
+// are obtained from interface name.
+// Instead of querying them *once*, create update_server_network_data_cache()
+// and call it before any usage of these fields.
+// update_server_network_data_cache() must re-query data
+// if more than N seconds have passed after last use.
+ int ifindex;
+ uint32_t server_nip;
#if ENABLE_FEATURE_UDHCP_PORT
uint16_t port;
#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 */
/* 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 */
- struct option_set *options; /* List of DHCP options loaded from the config file */
- char *interface; /* The name of the interface to use */
- int ifindex; /* Index number of the interface to use */
- uint8_t arp[6]; /* Our arp address */
+ uint32_t start_ip; /* start address of leases, in host order */
+ uint32_t end_ip; /* end of leases, in host order */
uint32_t lease; /* lease time in seconds (host order) */
uint32_t max_leases; /* maximum number of leases (including reserved address) */
uint32_t auto_time; /* how long should udhcpd wait before writing a config file.
@@ -48,10 +54,10 @@ struct server_config_t {
uint32_t conflict_time; /* how long an arp conflict offender is leased for */
uint32_t offer_time; /* how long an offered address is reserved */
uint32_t min_lease; /* minimum lease time a client can request */
- uint32_t siaddr_nip; /* next server bootp option */
+ uint32_t siaddr_nip; /* "next server" bootp option */
char *lease_file;
char *pidfile;
- char *notify_file; /* What to run whenever leases are written */
+ char *notify_file; /* what to run whenever leases are written */
char *sname; /* bootp server name */
char *boot_file; /* bootp boot file option */
struct static_lease *static_leases; /* List of ip/mac pairs to assign static leases */
diff --git a/networking/udhcp/leases.c b/networking/udhcp/leases.c
index c318856..291ae80 100644
--- a/networking/udhcp/leases.c
+++ b/networking/udhcp/leases.c
@@ -117,7 +117,7 @@ struct dhcpOfferedAddr* FAST_FUNC find_lease_by_yiaddr(uint32_t yiaddr)
}
-/* check is an IP is taken, if it is, add it to the lease table */
+/* Check if the IP is taken; if it is, add it to the lease table */
static int nobody_responds_to_arp(uint32_t addr, const uint8_t *safe_mac)
{
/* 16 zero bytes */
@@ -128,7 +128,8 @@ static int nobody_responds_to_arp(uint32_t addr, const uint8_t *safe_mac)
int r;
r = arpping(addr, safe_mac,
- server_config.server_nip, server_config.arp,
+ server_config.server_nip,
+ server_config.server_mac,
server_config.interface);
if (r)
return r;
diff --git a/networking/udhcp/serverpacket.c b/networking/udhcp/serverpacket.c
index 5aa494b..d9c5ce3 100644
--- a/networking/udhcp/serverpacket.c
+++ b/networking/udhcp/serverpacket.c
@@ -37,7 +37,7 @@ static int send_packet_to_relay(struct dhcpMessage *payload)
}
-/* send a packet to a specific arp address and ip address by creating our own ip packet */
+/* 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)
{
const uint8_t *chaddr;
diff --git a/networking/udhcp/socket.c b/networking/udhcp/socket.c
index 449fcb7..de494ca 100644
--- a/networking/udhcp/socket.c
+++ b/networking/udhcp/socket.c
@@ -37,7 +37,7 @@
#include "common.h"
-int FAST_FUNC udhcp_read_interface(const char *interface, int *ifindex, uint32_t *nip, uint8_t *arp)
+int FAST_FUNC udhcp_read_interface(const char *interface, int *ifindex, uint32_t *nip, uint8_t *mac)
{
int fd;
struct ifreq ifr;
@@ -69,14 +69,14 @@ int FAST_FUNC udhcp_read_interface(const char *interface, int *ifindex, uint32_t
*ifindex = ifr.ifr_ifindex;
}
- if (arp) {
+ if (mac) {
if (ioctl_or_warn(fd, SIOCGIFHWADDR, &ifr) != 0) {
close(fd);
return -1;
}
- memcpy(arp, ifr.ifr_hwaddr.sa_data, 6);
+ memcpy(mac, ifr.ifr_hwaddr.sa_data, 6);
DEBUG("adapter hardware address %02x:%02x:%02x:%02x:%02x:%02x",
- arp[0], arp[1], arp[2], arp[3], arp[4], arp[5]);
+ mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
}
close(fd);
generated by cgit v1.1 at 2024-12-27 08:17:54 +0000