diff options
Diffstat (limited to 'networking/udhcp/dhcpd.c')
| -rw-r--r-- | networking/udhcp/dhcpd.c | 77 |
1 files changed, 17 insertions, 60 deletions
diff --git a/networking/udhcp/dhcpd.c b/networking/udhcp/dhcpd.c index 56ddaa9..c21cb72 100644 --- a/networking/udhcp/dhcpd.c +++ b/networking/udhcp/dhcpd.c @@ -25,12 +25,9 @@ #include <string.h> #include <stdlib.h> #include <sys/wait.h> -#include <sys/stat.h> #include <arpa/inet.h> #include <netdb.h> #include <netinet/in.h> -#include <stdio.h> -#include <sys/types.h> #include <sys/socket.h> #include <unistd.h> #include <signal.h> @@ -39,47 +36,21 @@ #include <time.h> #include <sys/time.h> -#include "debug.h" #include "dhcpd.h" #include "arpping.h" #include "socket.h" #include "options.h" #include "files.h" -#include "leases.h" -#include "packet.h" #include "serverpacket.h" -#include "pidfile.h" +#include "common.h" /* globals */ struct dhcpOfferedAddr *leases; struct server_config_t server_config; -static int signal_pipe[2]; - -/* Exit and cleanup */ -static void exit_server(int retval) -{ - pidfile_delete(server_config.pidfile); - CLOSE_LOG(); - exit(retval); -} - - -/* Signal handler */ -static void signal_handler(int sig) -{ - if (send(signal_pipe[1], &sig, sizeof(sig), MSG_DONTWAIT) < 0) { - LOG(LOG_ERR, "Could not send signal: %s", - strerror(errno)); - } -} -#ifdef COMBINED_BINARY int udhcpd_main(int argc, char *argv[]) -#else -int main(int argc, char *argv[]) -#endif { fd_set rfds; struct timeval tv; @@ -92,13 +63,11 @@ int main(int argc, char *argv[]) unsigned long timeout_end; struct option_set *option; struct dhcpOfferedAddr *lease; - int pid_fd; int max_sock; int sig; unsigned long num_ips; - OPEN_LOG("udhcpd"); - LOG(LOG_INFO, "udhcp server (v%s) started", VERSION); + start_log("server"); memset(&server_config, 0, sizeof(struct server_config_t)); @@ -106,9 +75,6 @@ int main(int argc, char *argv[]) read_config(DHCPD_CONF_FILE); else read_config(argv[1]); - pid_fd = pidfile_acquire(server_config.pidfile); - pidfile_write_release(pid_fd); - if ((option = find_option(server_config.options, DHCP_LEASE_TIME))) { memcpy(&server_config.lease, option->data + 2, 4); server_config.lease = ntohl(server_config.lease); @@ -118,51 +84,43 @@ int main(int argc, char *argv[]) /* Sanity check */ num_ips = ntohl(server_config.end) - ntohl(server_config.start); if (server_config.max_leases > num_ips) { - LOG(LOG_ERR, "max_leases value (%lu) not sane, setting to %lu instead", + LOG(LOG_ERR, "max_leases value (%lu) not sane, " + "setting to %lu instead", server_config.max_leases, num_ips); server_config.max_leases = num_ips; } - leases = xmalloc(sizeof(struct dhcpOfferedAddr) * server_config.max_leases); - memset(leases, 0, sizeof(struct dhcpOfferedAddr) * server_config.max_leases); + leases = xcalloc(sizeof(struct dhcpOfferedAddr), server_config.max_leases); read_leases(server_config.lease_file); if (read_interface(server_config.interface, &server_config.ifindex, &server_config.server, server_config.arp) < 0) - exit_server(1); + return(1); -#ifndef DEBUGGING - pid_fd = pidfile_acquire(server_config.pidfile); /* hold lock during fork. */ - if (daemon(0, 0) == -1) { - perror("fork"); - exit_server(1); - } - pidfile_write_release(pid_fd); +#ifndef CONFIG_FEATURE_UDHCP_DEBUG + background(server_config.pidfile); #endif - - socketpair(AF_UNIX, SOCK_STREAM, 0, signal_pipe); - signal(SIGUSR1, signal_handler); - signal(SIGTERM, signal_handler); + udhcp_set_signal_pipe(0); timeout_end = time(0) + server_config.auto_time; while(1) { /* loop until universe collapses */ if (server_socket < 0) if ((server_socket = listen_socket(INADDR_ANY, SERVER_PORT, server_config.interface)) < 0) { - LOG(LOG_ERR, "FATAL: couldn't create server socket, %s", strerror(errno)); - exit_server(0); + LOG(LOG_ERR, "FATAL: couldn't create server socket, %m"); + return(2); } FD_ZERO(&rfds); FD_SET(server_socket, &rfds); - FD_SET(signal_pipe[0], &rfds); + FD_SET(udhcp_signal_pipe[0], &rfds); if (server_config.auto_time) { tv.tv_sec = timeout_end - time(0); tv.tv_usec = 0; } if (!server_config.auto_time || tv.tv_sec > 0) { - max_sock = server_socket > signal_pipe[0] ? server_socket : signal_pipe[0]; + max_sock = server_socket > udhcp_signal_pipe[0] ? server_socket : udhcp_signal_pipe[0]; retval = select(max_sock + 1, &rfds, NULL, NULL, server_config.auto_time ? &tv : NULL); } else retval = 0; /* If we already timed out, fall through */ @@ -176,8 +134,8 @@ int main(int argc, char *argv[]) continue; } - if (FD_ISSET(signal_pipe[0], &rfds)) { - if (read(signal_pipe[0], &sig, sizeof(sig)) < 0) + if (FD_ISSET(udhcp_signal_pipe[0], &rfds)) { + if (read(udhcp_signal_pipe[0], &sig, sizeof(sig)) < 0) continue; /* probably just EINTR */ switch (sig) { case SIGUSR1: @@ -188,13 +146,13 @@ int main(int argc, char *argv[]) continue; case SIGTERM: LOG(LOG_INFO, "Received a SIGTERM"); - exit_server(0); + return(0); } } if ((bytes = get_packet(&packet, server_socket)) < 0) { /* this waits for a packet - idle */ if (bytes == -1 && errno != EINTR) { - DEBUG(LOG_INFO, "error on read, %s, reopening socket", strerror(errno)); + DEBUG(LOG_INFO, "error on read, %m, reopening socket"); close(server_socket); server_socket = -1; } @@ -293,4 +251,3 @@ int main(int argc, char *argv[]) return 0; } - |