diff options
Diffstat (limited to 'networking/udhcp/dhcpd.c')
| -rw-r--r-- | networking/udhcp/dhcpd.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/networking/udhcp/dhcpd.c b/networking/udhcp/dhcpd.c index 7b45968..d0a1eba 100644 --- a/networking/udhcp/dhcpd.c +++ b/networking/udhcp/dhcpd.c @@ -26,8 +26,7 @@ int udhcpd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int udhcpd_main(int argc UNUSED_PARAM, char **argv) { fd_set rfds; - struct timeval tv; - int server_socket = -1, bytes, retval, max_sock; + int server_socket = -1, retval, max_sock; struct dhcpMessage packet; uint8_t *state, *server_id, *requested; uint32_t server_id_aligned = server_id_aligned; /* for compiler */ @@ -107,6 +106,8 @@ int udhcpd_main(int argc UNUSED_PARAM, char **argv) timeout_end = monotonic_sec() + server_config.auto_time; while (1) { /* loop until universe collapses */ + int bytes; + struct timeval tv; if (server_socket < 0) { server_socket = udhcp_listen_socket(/*INADDR_ANY,*/ SERVER_PORT, @@ -143,12 +144,15 @@ int udhcpd_main(int argc UNUSED_PARAM, char **argv) case SIGTERM: bb_info_msg("Received a SIGTERM"); goto ret0; - case 0: break; /* no signal */ - default: continue; /* signal or error (probably EINTR) */ + case 0: /* no signal: read a packet */ + break; + default: /* signal or error (probably EINTR): back to select */ + continue; } - bytes = udhcp_recv_kernel_packet(&packet, server_socket); /* this waits for a packet - idle */ + bytes = udhcp_recv_kernel_packet(&packet, server_socket); 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)); close(server_socket); @@ -165,7 +169,6 @@ int udhcpd_main(int argc UNUSED_PARAM, char **argv) /* Look for a static lease */ static_lease_ip = getIpByMac(server_config.static_leases, &packet.chaddr); - if (static_lease_ip) { bb_info_msg("Found static lease: %x", static_lease_ip); |