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c321b51dc

Denis Vlasenko
Denis Vlasenko
2008-09-26
FAILED Duration: 34s

Subject

udhcp: added some FIXMEs; code shrink. -49 bytes

Binary

No binary (build failed)

Architecture & Compiler Flags

Architecture: x86_64-linux-gnu Compiler: gcc (Ubuntu 11.4.0-1ubuntu1~22.04.3) 11.4.0

—

Build Log

(log yok)

Commit Diff GitHub →

networking/udhcp/clientpacket.c +20 -11networking/udhcp/common.h +3 -2networking/udhcp/dhcpc.c +6 -2networking/udhcp/dhcpc.h +1 -1networking/udhcp/packet.c +2 -1networking/udhcp/serverpacket.c +4 -2
networking/udhcp/clientpacket.c+20 -11
@@ -79,8 +79,18 @@ static void add_param_req_option(struct dhcpMessage *packet)
}
+static int raw_bcast_from_client_config_ifindex(struct dhcpMessage *packet)
+{
+ return udhcp_send_raw_packet(packet,
+ /*src*/ INADDR_ANY, CLIENT_PORT,
+ /*dst*/ INADDR_BROADCAST, SERVER_PORT, MAC_BCAST_ADDR,
+ client_config.ifindex);
+}
+
+
#if ENABLE_FEATURE_UDHCPC_ARPING
-/* Unicast a DHCP decline message */
+/* Broadcast a DHCP decline message */
+//FIXME: maybe it should be unicast?
int FAST_FUNC send_decline(uint32_t xid, uint32_t server, uint32_t requested)
{
struct dhcpMessage packet;
@@ -92,8 +102,7 @@ int FAST_FUNC send_decline(uint32_t xid, uint32_t server, uint32_t requested)
bb_info_msg("Sending decline...");
- return udhcp_send_raw_packet(&packet, INADDR_ANY, CLIENT_PORT, INADDR_BROADCAST,
- SERVER_PORT, MAC_BCAST_ADDR, client_config.ifindex);
+ return raw_bcast_from_client_config_ifindex(&packet);
}
#endif
@@ -114,13 +123,13 @@ int FAST_FUNC send_discover(uint32_t xid, uint32_t requested)
add_param_req_option(&packet);
bb_info_msg("Sending discover...");
- return udhcp_send_raw_packet(&packet, INADDR_ANY, CLIENT_PORT, INADDR_BROADCAST,
- SERVER_PORT, MAC_BCAST_ADDR, client_config.ifindex);
+ return raw_bcast_from_client_config_ifindex(&packet);
}
/* Broadcasts a DHCP request message */
-int FAST_FUNC send_selecting(uint32_t xid, uint32_t server, uint32_t requested)
+//FIXME: maybe it should be unicast?
+int FAST_FUNC send_select(uint32_t xid, uint32_t server, uint32_t requested)
{
struct dhcpMessage packet;
struct in_addr addr;
@@ -134,8 +143,7 @@ int FAST_FUNC send_selecting(uint32_t xid, uint32_t server, uint32_t requested)
addr.s_addr = requested;
bb_info_msg("Sending select for %s...", inet_ntoa(addr));
- return udhcp_send_raw_packet(&packet, INADDR_ANY, CLIENT_PORT, INADDR_BROADCAST,
- SERVER_PORT, MAC_BCAST_ADDR, client_config.ifindex);
+ return raw_bcast_from_client_config_ifindex(&packet);
}
@@ -151,10 +159,11 @@ int FAST_FUNC send_renew(uint32_t xid, uint32_t server, uint32_t ciaddr)
add_param_req_option(&packet);
bb_info_msg("Sending renew...");
if (server)
- return udhcp_send_kernel_packet(&packet, ciaddr, CLIENT_PORT, server, SERVER_PORT);
+ return udhcp_send_kernel_packet(&packet,
+ ciaddr, CLIENT_PORT,
+ server, SERVER_PORT);
- return udhcp_send_raw_packet(&packet, INADDR_ANY, CLIENT_PORT, INADDR_BROADCAST,
- SERVER_PORT, MAC_BCAST_ADDR, client_config.ifindex);
+ return raw_bcast_from_client_config_ifindex(&packet);
}
networking/udhcp/common.h+3 -2
@@ -66,8 +66,9 @@ int udhcp_recv_kernel_packet(struct dhcpMessage *packet, int fd) FAST_FUNC;
int udhcp_send_raw_packet(struct dhcpMessage *payload,
uint32_t source_ip, int source_port,
- uint32_t dest_ip, int dest_port,
- const uint8_t *dest_arp, int ifindex) FAST_FUNC;
+ uint32_t dest_ip, int dest_port, const uint8_t *dest_arp,
+ int ifindex) FAST_FUNC;
+
int udhcp_send_kernel_packet(struct dhcpMessage *payload,
uint32_t source_ip, int source_port,
uint32_t dest_ip, int dest_port) FAST_FUNC;
networking/udhcp/dhcpc.c+6 -2
@@ -389,7 +389,7 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
if (state == RENEW_REQUESTED) /* unicast */
send_renew(xid, server_addr, requested_ip);
else /* broadcast */
- send_selecting(xid, server_addr, requested_ip);
+ send_select(xid, server_addr, requested_ip);
timeout = discover_timeout;
packet_num++;
@@ -430,7 +430,7 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
* try to find DHCP server using broadcast */
if (timeout > 0) {
/* send a request packet */
- send_renew(xid, 0, requested_ip); /* broadcast */
+ send_renew(xid, 0 /* INADDR_ANY*/, requested_ip); /* broadcast */
timeout >>= 1;
continue;
}
@@ -529,6 +529,8 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
if (lease_seconds < 10) /* and not too small */
lease_seconds = 10;
}
+//FIXME: why do we check ARP only after we've got DHCPACK?
+//Shouldn't we do it immediately after DHCPOFFER?
#if ENABLE_FEATURE_UDHCPC_ARPING
if (opt & OPT_a) {
if (!arpping(packet.yiaddr,
@@ -538,6 +540,8 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
) {
bb_info_msg("offered address is in use "
"(got ARP reply), declining");
+//NB: not clear whether it should be unicast or bcast.
+//Currently it is a bcast. Why?
send_decline(xid, server_addr, packet.yiaddr);
if (state != REQUESTING)
networking/udhcp/dhcpc.h+1 -1
@@ -39,7 +39,7 @@ struct client_config_t {
uint32_t random_xid(void) FAST_FUNC;
int send_discover(uint32_t xid, uint32_t requested) FAST_FUNC;
-int send_selecting(uint32_t xid, uint32_t server, uint32_t requested) FAST_FUNC;
+int send_select(uint32_t xid, uint32_t server, uint32_t requested) FAST_FUNC;
#if ENABLE_FEATURE_UDHCPC_ARPING
int send_decline(uint32_t xid, uint32_t server, uint32_t requested) FAST_FUNC;
#endif
networking/udhcp/packet.c+2 -1
@@ -118,7 +118,8 @@ uint16_t FAST_FUNC udhcp_checksum(void *addr, int count)
/* Construct a ip/udp header for a packet, send packet */
int FAST_FUNC udhcp_send_raw_packet(struct dhcpMessage *payload,
uint32_t source_ip, int source_port,
- uint32_t dest_ip, int dest_port, const uint8_t *dest_arp, int ifindex)
+ uint32_t dest_ip, int dest_port, const uint8_t *dest_arp,
+ int ifindex)
{
struct sockaddr_ll dest;
struct udp_dhcp_packet packet;
networking/udhcp/serverpacket.c+4 -2
@@ -59,8 +59,10 @@ static int send_packet_to_client(struct dhcpMessage *payload, int force_broadcas
ciaddr = payload->yiaddr;
chaddr = payload->chaddr;
}
- return udhcp_send_raw_packet(payload, server_config.server, SERVER_PORT,
- ciaddr, CLIENT_PORT, chaddr, server_config.ifindex);
+ return udhcp_send_raw_packet(payload,
+ /*src*/ server_config.server, SERVER_PORT,
+ /*dst*/ ciaddr, CLIENT_PORT, chaddr,
+ server_config.ifindex);
}