static void smbd_accept_connection(struct tevent_context *ev, struct tevent_fd *fde, uint16_t flags, void *private_data) { struct smbd_open_socket *s = talloc_get_type_abort(private_data, struct smbd_open_socket); struct messaging_context *msg_ctx = s->parent->msg_ctx; struct sockaddr_storage addr; socklen_t in_addrlen = sizeof(addr); int fd; pid_t pid = 0; fd = accept(s->fd, (struct sockaddr *)(void *)&addr,&in_addrlen); if (fd == -1 && errno == EINTR) return; if (fd == -1) { DEBUG(0,("accept: %s\n", strerror(errno))); return; } if (s->parent->interactive) { reinit_after_fork(msg_ctx, ev, true, NULL); smbd_process(ev, msg_ctx, fd, true); exit_server_cleanly("end of interactive mode"); return; } if (!allowable_number_of_smbd_processes(s->parent)) { close(fd); return; } pid = fork(); if (pid == 0) { NTSTATUS status = NT_STATUS_OK; /* * Can't use TALLOC_FREE here. Nulling out the argument to it * would overwrite memory we've just freed. */ talloc_free(s->parent); s = NULL; /* Stop zombies, the parent explicitly handles * them, counting worker smbds. */ CatchChild(); status = smbd_reinit_after_fork(msg_ctx, ev, true, NULL); if (!NT_STATUS_IS_OK(status)) { if (NT_STATUS_EQUAL(status, NT_STATUS_TOO_MANY_OPENED_FILES)) { DEBUG(0,("child process cannot initialize " "because too many files are open\n")); goto exit; } if (lp_clustering() && NT_STATUS_EQUAL(status, NT_STATUS_INTERNAL_DB_ERROR)) { DEBUG(1,("child process cannot initialize " "because connection to CTDB " "has failed\n")); goto exit; } DEBUG(0,("reinit_after_fork() failed\n")); smb_panic("reinit_after_fork() failed"); } smbd_process(ev, msg_ctx, fd, false); exit: exit_server_cleanly("end of child"); return; } if (pid < 0) { DEBUG(0,("smbd_accept_connection: fork() failed: %s\n", strerror(errno))); } /* The parent doesn't need this socket */ close(fd); /* Sun May 6 18:56:14 2001 [email protected]: Clear the closed fd info out of server_fd -- and more importantly, out of client_fd in util_sock.c, to avoid a possible getpeername failure if we reopen the logs and use %I in the filename. */ if (pid != 0) { add_child_pid(s->parent, pid); } /* Force parent to check log size after * spawning child. Fix from * [email protected]. The * parent smbd will log to logserver.smb. It * writes only two messages for each child * started/finished. But each child writes, * say, 50 messages also in logserver.smb, * begining with the debug_count of the * parent, before the child opens its own log * file logserver.client. In a worst case * scenario the size of logserver.smb would be * checked after about 50*50=2500 messages * (ca. 100kb). * */ force_check_log_size(); }
static void smbd_accept_connection(struct tevent_context *ev, struct tevent_fd *fde, uint16_t flags, void *private_data) { struct smbd_open_socket *s = talloc_get_type_abort(private_data, struct smbd_open_socket); struct messaging_context *msg_ctx = s->msg_ctx; struct smbd_server_connection *sconn = msg_ctx_to_sconn(msg_ctx); struct sockaddr_storage addr; socklen_t in_addrlen = sizeof(addr); int fd; pid_t pid = 0; uint64_t unique_id; fd = accept(s->fd, (struct sockaddr *)(void *)&addr,&in_addrlen); sconn->sock = fd; if (fd == -1 && errno == EINTR) return; if (fd == -1) { DEBUG(0,("open_sockets_smbd: accept: %s\n", strerror(errno))); return; } if (s->parent->interactive) { smbd_process(ev, sconn); exit_server_cleanly("end of interactive mode"); return; } if (!allowable_number_of_smbd_processes()) { close(fd); sconn->sock = -1; return; } /* * Generate a unique id in the parent process so that we use * the global random state in the parent. */ generate_random_buffer((uint8_t *)&unique_id, sizeof(unique_id)); pid = sys_fork(); if (pid == 0) { NTSTATUS status = NT_STATUS_OK; /* Child code ... */ am_parent = 0; set_my_unique_id(unique_id); /* Stop zombies, the parent explicitly handles * them, counting worker smbds. */ CatchChild(); /* close our standard file descriptors */ if (!debug_get_output_is_stdout()) { close_low_fds(False); /* Don't close stderr */ } /* * Can't use TALLOC_FREE here. Nulling out the argument to it * would overwrite memory we've just freed. */ talloc_free(s->parent); s = NULL; status = reinit_after_fork(msg_ctx, ev, procid_self(), true); if (!NT_STATUS_IS_OK(status)) { if (NT_STATUS_EQUAL(status, NT_STATUS_TOO_MANY_OPENED_FILES)) { DEBUG(0,("child process cannot initialize " "because too many files are open\n")); goto exit; } if (lp_clustering() && NT_STATUS_EQUAL(status, NT_STATUS_INTERNAL_DB_ERROR)) { DEBUG(1,("child process cannot initialize " "because connection to CTDB " "has failed\n")); goto exit; } DEBUG(0,("reinit_after_fork() failed\n")); smb_panic("reinit_after_fork() failed"); } smbd_setup_sig_term_handler(); smbd_setup_sig_hup_handler(ev, msg_ctx); if (!serverid_register(procid_self(), FLAG_MSG_GENERAL|FLAG_MSG_SMBD |FLAG_MSG_DBWRAP |FLAG_MSG_PRINT_GENERAL)) { exit_server_cleanly("Could not register myself in " "serverid.tdb"); } smbd_process(ev, sconn); exit: exit_server_cleanly("end of child"); return; } if (pid < 0) { DEBUG(0,("smbd_accept_connection: sys_fork() failed: %s\n", strerror(errno))); } /* The parent doesn't need this socket */ close(fd); /* Sun May 6 18:56:14 2001 [email protected]: Clear the closed fd info out of server_fd -- and more importantly, out of client_fd in util_sock.c, to avoid a possible getpeername failure if we reopen the logs and use %I in the filename. */ sconn->sock = -1; if (pid != 0) { add_child_pid(pid); } /* Force parent to check log size after * spawning child. Fix from * [email protected]. The * parent smbd will log to logserver.smb. It * writes only two messages for each child * started/finished. But each child writes, * say, 50 messages also in logserver.smb, * begining with the debug_count of the * parent, before the child opens its own log * file logserver.client. In a worst case * scenario the size of logserver.smb would be * checked after about 50*50=2500 messages * (ca. 100kb). * */ force_check_log_size(); }
static BOOL open_sockets_smbd(BOOL is_daemon, BOOL interactive, const char *smb_ports) { int num_interfaces = iface_count(); int num_sockets = 0; int fd_listenset[FD_SETSIZE]; fd_set listen_set; int s; int maxfd = 0; int i; char *ports; if (!is_daemon) { return open_sockets_inetd(); } #ifdef HAVE_ATEXIT { static int atexit_set; if(atexit_set == 0) { atexit_set=1; atexit(killkids); } } #endif #ifndef _XBOX /* Stop zombies */ CatchChild(); #endif FD_ZERO(&listen_set); /* use a reasonable default set of ports - listing on 445 and 139 */ if (!smb_ports) { ports = lp_smb_ports(); if (!ports || !*ports) { ports = smb_xstrdup(SMB_PORTS); } else { ports = smb_xstrdup(ports); } } else { ports = smb_xstrdup(smb_ports); } if (lp_interfaces() && lp_bind_interfaces_only()) { /* We have been given an interfaces line, and been told to only bind to those interfaces. Create a socket per interface and bind to only these. */ /* Now open a listen socket for each of the interfaces. */ for(i = 0; i < num_interfaces; i++) { struct in_addr *ifip = iface_n_ip(i); fstring tok; const char *ptr; if(ifip == NULL) { DEBUG(0,("open_sockets_smbd: interface %d has NULL IP address !\n", i)); continue; } for (ptr=ports; next_token(&ptr, tok, " \t,", sizeof(tok)); ) { unsigned port = atoi(tok); if (port == 0) { continue; } s = fd_listenset[num_sockets] = open_socket_in(SOCK_STREAM, port, 0, ifip->s_addr, True); if(s == -1) return False; /* ready to listen */ set_socket_options(s,"SO_KEEPALIVE"); set_socket_options(s,user_socket_options); /* Set server socket to non-blocking for the accept. */ set_blocking(s,False); if (listen(s, SMBD_LISTEN_BACKLOG) == -1) { DEBUG(0,("listen: %s\n",strerror(errno))); close(s); return False; } FD_SET(s,&listen_set); maxfd = MAX( maxfd, s); num_sockets++; if (num_sockets >= FD_SETSIZE) { DEBUG(0,("open_sockets_smbd: Too many sockets to bind to\n")); return False; } } } } else { /* Just bind to 0.0.0.0 - accept connections from anywhere. */ fstring tok; const char *ptr; num_interfaces = 1; for (ptr=ports; next_token(&ptr, tok, " \t,", sizeof(tok)); ) { unsigned port = atoi(tok); if (port == 0) continue; /* open an incoming socket */ s = open_socket_in(SOCK_STREAM, port, 0, interpret_addr(lp_socket_address()),True); if (s == -1) return(False); /* ready to listen */ #ifndef _XBOX set_socket_options(s,"SO_KEEPALIVE"); #endif set_socket_options(s,user_socket_options); /* Set server socket to non-blocking for the accept. */ set_blocking(s,False); if (listen(s, SMBD_LISTEN_BACKLOG) == -1) { DEBUG(0,("open_sockets_smbd: listen: %s\n", strerror(errno))); close(s); return False; } fd_listenset[num_sockets] = s; FD_SET(s,&listen_set); maxfd = MAX( maxfd, s); num_sockets++; if (num_sockets >= FD_SETSIZE) { DEBUG(0,("open_sockets_smbd: Too many sockets to bind to\n")); return False; } } } SAFE_FREE(ports); /* Listen to messages */ message_register(MSG_SMB_SAM_SYNC, msg_sam_sync); message_register(MSG_SMB_SAM_REPL, msg_sam_repl); message_register(MSG_SHUTDOWN, msg_exit_server); message_register(MSG_SMB_FILE_RENAME, msg_file_was_renamed); message_register(MSG_SMB_CONF_UPDATED, smb_conf_updated); #ifdef DEVELOPER message_register(MSG_SMB_INJECT_FAULT, msg_inject_fault); #endif /* now accept incoming connections - forking a new process for each incoming connection */ DEBUG(2,("waiting for a connection\n")); while (1) { fd_set lfds; int num; /* Free up temporary memory from the main smbd. */ lp_TALLOC_FREE(); /* Ensure we respond to PING and DEBUG messages from the main smbd. */ message_dispatch(); memcpy((char *)&lfds, (char *)&listen_set, sizeof(listen_set)); num = sys_select(maxfd+1,&lfds,NULL,NULL,NULL); if (num == -1 && errno == EINTR) { if (got_sig_term) { exit_server_cleanly(NULL); } /* check for sighup processing */ if (reload_after_sighup) { change_to_root_user(); DEBUG(1,("Reloading services after SIGHUP\n")); reload_services(False); reload_after_sighup = 0; } continue; } /* check if we need to reload services */ check_reload(time(NULL)); /* Find the sockets that are read-ready - accept on these. */ for( ; num > 0; num--) { struct sockaddr addr; socklen_t in_addrlen = sizeof(addr); s = -1; for(i = 0; i < num_sockets; i++) { if(FD_ISSET(fd_listenset[i],&lfds)) { s = fd_listenset[i]; /* Clear this so we don't look at it again. */ FD_CLR(fd_listenset[i],&lfds); break; } } smbd_set_server_fd(accept(s,&addr,&in_addrlen)); if (smbd_server_fd() == -1 && errno == EINTR) continue; if (smbd_server_fd() == -1) { DEBUG(0,("open_sockets_smbd: accept: %s\n", strerror(errno))); continue; } /* Ensure child is set to blocking mode */ set_blocking(smbd_server_fd(),True); if (smbd_server_fd() != -1 && interactive) { #ifdef _XBOX xb_IncClientCount(); #endif return True; } if (allowable_number_of_smbd_processes() && smbd_server_fd() != -1 && sys_fork()==0) { /* Child code ... */ /* close the listening socket(s) */ for(i = 0; i < num_sockets; i++) close(fd_listenset[i]); /* close our standard file descriptors */ close_low_fds(False); am_parent = 0; set_socket_options(smbd_server_fd(),"SO_KEEPALIVE"); set_socket_options(smbd_server_fd(),user_socket_options); /* this is needed so that we get decent entries in smbstatus for port 445 connects */ set_remote_machine_name(get_peer_addr(smbd_server_fd()), False); /* Reset the state of the random * number generation system, so * children do not get the same random * numbers as each other */ set_need_random_reseed(); /* tdb needs special fork handling - remove CLEAR_IF_FIRST flags */ if (tdb_reopen_all(1) == -1) { DEBUG(0,("tdb_reopen_all failed.\n")); smb_panic("tdb_reopen_all failed."); } return True; } /* The parent doesn't need this socket */ close(smbd_server_fd()); /* Sun May 6 18:56:14 2001 [email protected]: Clear the closed fd info out of server_fd -- and more importantly, out of client_fd in util_sock.c, to avoid a possible getpeername failure if we reopen the logs and use %I in the filename. */ smbd_set_server_fd(-1); /* Force parent to check log size after * spawning child. Fix from * [email protected]. The * parent smbd will log to logserver.smb. It * writes only two messages for each child * started/finished. But each child writes, * say, 50 messages also in logserver.smb, * begining with the debug_count of the * parent, before the child opens its own log * file logserver.client. In a worst case * scenario the size of logserver.smb would be * checked after about 50*50=2500 messages * (ca. 100kb). * */ force_check_log_size(); } /* end for num */ } /* end while 1 */ /* NOTREACHED return True; */ }