diff options
Diffstat (limited to 'usr.sbin/inetd/inetd.c')
-rw-r--r-- | usr.sbin/inetd/inetd.c | 2584 |
1 files changed, 0 insertions, 2584 deletions
diff --git a/usr.sbin/inetd/inetd.c b/usr.sbin/inetd/inetd.c deleted file mode 100644 index 0a39fdf..0000000 --- a/usr.sbin/inetd/inetd.c +++ /dev/null @@ -1,2584 +0,0 @@ -/* - * Copyright (c) 1983, 1991, 1993, 1994 - * The Regents of the University of California. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#ifndef lint -static const char copyright[] = -"@(#) Copyright (c) 1983, 1991, 1993, 1994\n\ - The Regents of the University of California. All rights reserved.\n"; -#endif /* not lint */ - -#ifndef lint -#if 0 -static char sccsid[] = "@(#)from: inetd.c 8.4 (Berkeley) 4/13/94"; -#endif -#endif /* not lint */ - -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -/* - * Inetd - Internet super-server - * - * This program invokes all internet services as needed. Connection-oriented - * services are invoked each time a connection is made, by creating a process. - * This process is passed the connection as file descriptor 0 and is expected - * to do a getpeername to find out the source host and port. - * - * Datagram oriented services are invoked when a datagram - * arrives; a process is created and passed a pending message - * on file descriptor 0. Datagram servers may either connect - * to their peer, freeing up the original socket for inetd - * to receive further messages on, or ``take over the socket'', - * processing all arriving datagrams and, eventually, timing - * out. The first type of server is said to be ``multi-threaded''; - * the second type of server ``single-threaded''. - * - * Inetd uses a configuration file which is read at startup - * and, possibly, at some later time in response to a hangup signal. - * The configuration file is ``free format'' with fields given in the - * order shown below. Continuation lines for an entry must begin with - * a space or tab. All fields must be present in each entry. - * - * service name must be in /etc/services - * or name a tcpmux service - * or specify a unix domain socket - * socket type stream/dgram/raw/rdm/seqpacket - * protocol tcp[4][6][/faith], udp[4][6], unix - * wait/nowait single-threaded/multi-threaded - * user[:group][/login-class] user/group/login-class to run daemon as - * server program full path name - * server program arguments maximum of MAXARGS (20) - * - * TCP services without official port numbers are handled with the - * RFC1078-based tcpmux internal service. Tcpmux listens on port 1 for - * requests. When a connection is made from a foreign host, the service - * requested is passed to tcpmux, which looks it up in the servtab list - * and returns the proper entry for the service. Tcpmux returns a - * negative reply if the service doesn't exist, otherwise the invoked - * server is expected to return the positive reply if the service type in - * inetd.conf file has the prefix "tcpmux/". If the service type has the - * prefix "tcpmux/+", tcpmux will return the positive reply for the - * process; this is for compatibility with older server code, and also - * allows you to invoke programs that use stdin/stdout without putting any - * special server code in them. Services that use tcpmux are "nowait" - * because they do not have a well-known port and hence cannot listen - * for new requests. - * - * For RPC services - * service name/version must be in /etc/rpc - * socket type stream/dgram/raw/rdm/seqpacket - * protocol rpc/tcp[4][6], rpc/udp[4][6] - * wait/nowait single-threaded/multi-threaded - * user[:group][/login-class] user/group/login-class to run daemon as - * server program full path name - * server program arguments maximum of MAXARGS - * - * Comment lines are indicated by a `#' in column 1. - * - * #ifdef IPSEC - * Comment lines that start with "#@" denote IPsec policy string, as described - * in ipsec_set_policy(3). This will affect all the following items in - * inetd.conf(8). To reset the policy, just use "#@" line. By default, - * there's no IPsec policy. - * #endif - */ -#include <sys/param.h> -#include <sys/ioctl.h> -#include <sys/mman.h> -#include <sys/wait.h> -#include <sys/time.h> -#include <sys/resource.h> -#include <sys/stat.h> -#include <sys/un.h> - -#include <netinet/in.h> -#include <netinet/tcp.h> -#include <arpa/inet.h> -#include <rpc/rpc.h> -#include <rpc/pmap_clnt.h> - -#include <ctype.h> -#include <errno.h> -#include <err.h> -#include <fcntl.h> -#include <grp.h> -#include <libutil.h> -#include <limits.h> -#include <netdb.h> -#include <pwd.h> -#include <signal.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <sysexits.h> -#include <syslog.h> -#include <tcpd.h> -#include <unistd.h> - -#include "inetd.h" -#include "pathnames.h" - -#ifdef IPSEC -#include <netipsec/ipsec.h> -#ifndef IPSEC_POLICY_IPSEC /* no ipsec support on old ipsec */ -#undef IPSEC -#endif -#endif - -#ifndef LIBWRAP_ALLOW_FACILITY -# define LIBWRAP_ALLOW_FACILITY LOG_AUTH -#endif -#ifndef LIBWRAP_ALLOW_SEVERITY -# define LIBWRAP_ALLOW_SEVERITY LOG_INFO -#endif -#ifndef LIBWRAP_DENY_FACILITY -# define LIBWRAP_DENY_FACILITY LOG_AUTH -#endif -#ifndef LIBWRAP_DENY_SEVERITY -# define LIBWRAP_DENY_SEVERITY LOG_WARNING -#endif - -#define ISWRAP(sep) \ - ( ((wrap_ex && !(sep)->se_bi) || (wrap_bi && (sep)->se_bi)) \ - && (sep->se_family == AF_INET || sep->se_family == AF_INET6) \ - && ( ((sep)->se_accept && (sep)->se_socktype == SOCK_STREAM) \ - || (sep)->se_socktype == SOCK_DGRAM)) - -#ifdef LOGIN_CAP -#include <login_cap.h> - -/* see init.c */ -#define RESOURCE_RC "daemon" - -#endif - -#ifndef MAXCHILD -#define MAXCHILD -1 /* maximum number of this service - < 0 = no limit */ -#endif - -#ifndef MAXCPM -#define MAXCPM -1 /* rate limit invocations from a - single remote address, - < 0 = no limit */ -#endif - -#ifndef MAXPERIP -#define MAXPERIP -1 /* maximum number of this service - from a single remote address, - < 0 = no limit */ -#endif - -#ifndef TOOMANY -#define TOOMANY 256 /* don't start more than TOOMANY */ -#endif -#define CNT_INTVL 60 /* servers in CNT_INTVL sec. */ -#define RETRYTIME (60*10) /* retry after bind or server fail */ -#define MAX_MAXCHLD 32767 /* max allowable max children */ - -#define SIGBLOCK (sigmask(SIGCHLD)|sigmask(SIGHUP)|sigmask(SIGALRM)) - -void close_sep(struct servtab *); -void flag_signal(int); -void flag_config(int); -void config(void); -int cpmip(const struct servtab *, int); -void endconfig(void); -struct servtab *enter(struct servtab *); -void freeconfig(struct servtab *); -struct servtab *getconfigent(void); -int matchservent(const char *, const char *, const char *); -char *nextline(FILE *); -void addchild(struct servtab *, int); -void flag_reapchild(int); -void reapchild(void); -void enable(struct servtab *); -void disable(struct servtab *); -void flag_retry(int); -void retry(void); -int setconfig(void); -void setup(struct servtab *); -#ifdef IPSEC -void ipsecsetup(struct servtab *); -#endif -void unregisterrpc(register struct servtab *sep); -static struct conninfo *search_conn(struct servtab *sep, int ctrl); -static int room_conn(struct servtab *sep, struct conninfo *conn); -static void addchild_conn(struct conninfo *conn, pid_t pid); -static void reapchild_conn(pid_t pid); -static void free_conn(struct conninfo *conn); -static void resize_conn(struct servtab *sep, int maxperip); -static void free_connlist(struct servtab *sep); -static void free_proc(struct procinfo *); -static struct procinfo *search_proc(pid_t pid, int add); -static int hashval(char *p, int len); - -int allow_severity; -int deny_severity; -int wrap_ex = 0; -int wrap_bi = 0; -int debug = 0; -int dolog = 0; -int maxsock; /* highest-numbered descriptor */ -fd_set allsock; -int options; -int timingout; -int toomany = TOOMANY; -int maxchild = MAXCHILD; -int maxcpm = MAXCPM; -int maxperip = MAXPERIP; -struct servent *sp; -struct rpcent *rpc; -char *hostname = NULL; -struct sockaddr_in *bind_sa4; -int v4bind_ok = 0; -#ifdef INET6 -struct sockaddr_in6 *bind_sa6; -int v6bind_ok = 0; -#endif -int signalpipe[2]; -#ifdef SANITY_CHECK -int nsock; -#endif -uid_t euid; -gid_t egid; -mode_t mask; - -struct servtab *servtab; - -extern struct biltin biltins[]; - -const char *CONFIG = _PATH_INETDCONF; -const char *pid_file = _PATH_INETDPID; -struct pidfh *pfh = NULL; - -struct netconfig *udpconf, *tcpconf, *udp6conf, *tcp6conf; - -static LIST_HEAD(, procinfo) proctable[PERIPSIZE]; - -int -getvalue(const char *arg, int *value, const char *whine) -{ - int tmp; - char *p; - - tmp = strtol(arg, &p, 0); - if (tmp < 0 || *p) { - syslog(LOG_ERR, whine, arg); - return 1; /* failure */ - } - *value = tmp; - return 0; /* success */ -} - -static sa_family_t -whichaf(struct request_info *req) -{ - struct sockaddr *sa; - - sa = (struct sockaddr *)req->client->sin; - if (sa == NULL) - return AF_UNSPEC; - if (sa->sa_family == AF_INET6 && - IN6_IS_ADDR_V4MAPPED(&((struct sockaddr_in6 *)sa)->sin6_addr)) - return AF_INET; - return sa->sa_family; -} - -int -main(int argc, char **argv) -{ - struct servtab *sep; - struct passwd *pwd; - struct group *grp; - struct sigaction sa, saalrm, sachld, sahup, sapipe; - int ch, dofork; - pid_t pid; - char buf[50]; -#ifdef LOGIN_CAP - login_cap_t *lc = NULL; -#endif - struct request_info req; - int denied; - char *service = NULL; - union { - struct sockaddr peer_un; - struct sockaddr_in peer_un4; - struct sockaddr_in6 peer_un6; - struct sockaddr_storage peer_max; - } p_un; -#define peer p_un.peer_un -#define peer4 p_un.peer_un4 -#define peer6 p_un.peer_un6 -#define peermax p_un.peer_max - int i; - struct addrinfo hints, *res; - const char *servname; - int error; - struct conninfo *conn; - - openlog("inetd", LOG_PID | LOG_NOWAIT | LOG_PERROR, LOG_DAEMON); - - while ((ch = getopt(argc, argv, "dlwWR:a:c:C:p:s:")) != -1) - switch(ch) { - case 'd': - debug = 1; - options |= SO_DEBUG; - break; - case 'l': - dolog = 1; - break; - case 'R': - getvalue(optarg, &toomany, - "-R %s: bad value for service invocation rate"); - break; - case 'c': - getvalue(optarg, &maxchild, - "-c %s: bad value for maximum children"); - break; - case 'C': - getvalue(optarg, &maxcpm, - "-C %s: bad value for maximum children/minute"); - break; - case 'a': - hostname = optarg; - break; - case 'p': - pid_file = optarg; - break; - case 's': - getvalue(optarg, &maxperip, - "-s %s: bad value for maximum children per source address"); - break; - case 'w': - wrap_ex++; - break; - case 'W': - wrap_bi++; - break; - case '?': - default: - syslog(LOG_ERR, - "usage: inetd [-dlwW] [-a address] [-R rate]" - " [-c maximum] [-C rate]" - " [-p pidfile] [conf-file]"); - exit(EX_USAGE); - } - /* - * Initialize Bind Addrs. - * When hostname is NULL, wild card bind addrs are obtained from - * getaddrinfo(). But getaddrinfo() requires at least one of - * hostname or servname is non NULL. - * So when hostname is NULL, set dummy value to servname. - * Since getaddrinfo() doesn't accept numeric servname, and - * we doesn't use ai_socktype of struct addrinfo returned - * from getaddrinfo(), we set dummy value to ai_socktype. - */ - servname = (hostname == NULL) ? "0" /* dummy */ : NULL; - - bzero(&hints, sizeof(struct addrinfo)); - hints.ai_flags = AI_PASSIVE; - hints.ai_family = AF_UNSPEC; - hints.ai_socktype = SOCK_STREAM; /* dummy */ - error = getaddrinfo(hostname, servname, &hints, &res); - if (error != 0) { - syslog(LOG_ERR, "-a %s: %s", hostname, gai_strerror(error)); - if (error == EAI_SYSTEM) - syslog(LOG_ERR, "%s", strerror(errno)); - exit(EX_USAGE); - } - do { - if (res->ai_addr == NULL) { - syslog(LOG_ERR, "-a %s: getaddrinfo failed", hostname); - exit(EX_USAGE); - } - switch (res->ai_addr->sa_family) { - case AF_INET: - if (v4bind_ok) - continue; - bind_sa4 = (struct sockaddr_in *)res->ai_addr; - /* init port num in case servname is dummy */ - bind_sa4->sin_port = 0; - v4bind_ok = 1; - continue; -#ifdef INET6 - case AF_INET6: - if (v6bind_ok) - continue; - bind_sa6 = (struct sockaddr_in6 *)res->ai_addr; - /* init port num in case servname is dummy */ - bind_sa6->sin6_port = 0; - v6bind_ok = 1; - continue; -#endif - } - if (v4bind_ok -#ifdef INET6 - && v6bind_ok -#endif - ) - break; - } while ((res = res->ai_next) != NULL); - if (!v4bind_ok -#ifdef INET6 - && !v6bind_ok -#endif - ) { - syslog(LOG_ERR, "-a %s: unknown address family", hostname); - exit(EX_USAGE); - } - - euid = geteuid(); - egid = getegid(); - umask(mask = umask(0777)); - - argc -= optind; - argv += optind; - - if (argc > 0) - CONFIG = argv[0]; - if (access(CONFIG, R_OK) < 0) - syslog(LOG_ERR, "Accessing %s: %m, continuing anyway.", CONFIG); - if (debug == 0) { - pid_t otherpid; - - pfh = pidfile_open(pid_file, 0600, &otherpid); - if (pfh == NULL) { - if (errno == EEXIST) { - syslog(LOG_ERR, "%s already running, pid: %d", - getprogname(), otherpid); - exit(EX_OSERR); - } - syslog(LOG_WARNING, "pidfile_open() failed: %m"); - } - - if (daemon(0, 0) < 0) { - syslog(LOG_WARNING, "daemon(0,0) failed: %m"); - } - /* From now on we don't want syslog messages going to stderr. */ - closelog(); - openlog("inetd", LOG_PID | LOG_NOWAIT, LOG_DAEMON); - /* - * In case somebody has started inetd manually, we need to - * clear the logname, so that old servers run as root do not - * get the user's logname.. - */ - if (setlogin("") < 0) { - syslog(LOG_WARNING, "cannot clear logname: %m"); - /* no big deal if it fails.. */ - } - if (pfh != NULL && pidfile_write(pfh) == -1) { - syslog(LOG_WARNING, "pidfile_write(): %m"); - } - } - - if (madvise(NULL, 0, MADV_PROTECT) != 0) - syslog(LOG_WARNING, "madvise() failed: %s", strerror(errno)); - - for (i = 0; i < PERIPSIZE; ++i) - LIST_INIT(&proctable[i]); - - if (v4bind_ok) { - udpconf = getnetconfigent("udp"); - tcpconf = getnetconfigent("tcp"); - if (udpconf == NULL || tcpconf == NULL) { - syslog(LOG_ERR, "unknown rpc/udp or rpc/tcp"); - exit(EX_USAGE); - } - } -#ifdef INET6 - if (v6bind_ok) { - udp6conf = getnetconfigent("udp6"); - tcp6conf = getnetconfigent("tcp6"); - if (udp6conf == NULL || tcp6conf == NULL) { - syslog(LOG_ERR, "unknown rpc/udp6 or rpc/tcp6"); - exit(EX_USAGE); - } - } -#endif - - sa.sa_flags = 0; - sigemptyset(&sa.sa_mask); - sigaddset(&sa.sa_mask, SIGALRM); - sigaddset(&sa.sa_mask, SIGCHLD); - sigaddset(&sa.sa_mask, SIGHUP); - sa.sa_handler = flag_retry; - sigaction(SIGALRM, &sa, &saalrm); - config(); - sa.sa_handler = flag_config; - sigaction(SIGHUP, &sa, &sahup); - sa.sa_handler = flag_reapchild; - sigaction(SIGCHLD, &sa, &sachld); - sa.sa_handler = SIG_IGN; - sigaction(SIGPIPE, &sa, &sapipe); - - { - /* space for daemons to overwrite environment for ps */ -#define DUMMYSIZE 100 - char dummy[DUMMYSIZE]; - - (void)memset(dummy, 'x', DUMMYSIZE - 1); - dummy[DUMMYSIZE - 1] = '\0'; - (void)setenv("inetd_dummy", dummy, 1); - } - - if (pipe(signalpipe) != 0) { - syslog(LOG_ERR, "pipe: %m"); - exit(EX_OSERR); - } - if (fcntl(signalpipe[0], F_SETFD, FD_CLOEXEC) < 0 || - fcntl(signalpipe[1], F_SETFD, FD_CLOEXEC) < 0) { - syslog(LOG_ERR, "signalpipe: fcntl (F_SETFD, FD_CLOEXEC): %m"); - exit(EX_OSERR); - } - FD_SET(signalpipe[0], &allsock); -#ifdef SANITY_CHECK - nsock++; -#endif - if (signalpipe[0] > maxsock) - maxsock = signalpipe[0]; - if (signalpipe[1] > maxsock) - maxsock = signalpipe[1]; - - for (;;) { - int n, ctrl; - fd_set readable; - -#ifdef SANITY_CHECK - if (nsock == 0) { - syslog(LOG_ERR, "%s: nsock=0", __func__); - exit(EX_SOFTWARE); - } -#endif - readable = allsock; - if ((n = select(maxsock + 1, &readable, (fd_set *)0, - (fd_set *)0, (struct timeval *)0)) <= 0) { - if (n < 0 && errno != EINTR) { - syslog(LOG_WARNING, "select: %m"); - sleep(1); - } - continue; - } - /* handle any queued signal flags */ - if (FD_ISSET(signalpipe[0], &readable)) { - int nsig; - if (ioctl(signalpipe[0], FIONREAD, &nsig) != 0) { - syslog(LOG_ERR, "ioctl: %m"); - exit(EX_OSERR); - } - while (--nsig >= 0) { - char c; - if (read(signalpipe[0], &c, 1) != 1) { - syslog(LOG_ERR, "read: %m"); - exit(EX_OSERR); - } - if (debug) - warnx("handling signal flag %c", c); - switch(c) { - case 'A': /* sigalrm */ - retry(); - break; - case 'C': /* sigchld */ - reapchild(); - break; - case 'H': /* sighup */ - config(); - break; - } - } - } - for (sep = servtab; n && sep; sep = sep->se_next) - if (sep->se_fd != -1 && FD_ISSET(sep->se_fd, &readable)) { - n--; - if (debug) - warnx("someone wants %s", sep->se_service); - dofork = !sep->se_bi || sep->se_bi->bi_fork || ISWRAP(sep); - conn = NULL; - if (sep->se_accept && sep->se_socktype == SOCK_STREAM) { - i = 1; - if (ioctl(sep->se_fd, FIONBIO, &i) < 0) - syslog(LOG_ERR, "ioctl (FIONBIO, 1): %m"); - ctrl = accept(sep->se_fd, (struct sockaddr *)0, - (socklen_t *)0); - if (debug) - warnx("accept, ctrl %d", ctrl); - if (ctrl < 0) { - if (errno != EINTR) - syslog(LOG_WARNING, - "accept (for %s): %m", - sep->se_service); - if (sep->se_accept && - sep->se_socktype == SOCK_STREAM) - close(ctrl); - continue; - } - i = 0; - if (ioctl(sep->se_fd, FIONBIO, &i) < 0) - syslog(LOG_ERR, "ioctl1(FIONBIO, 0): %m"); - if (ioctl(ctrl, FIONBIO, &i) < 0) - syslog(LOG_ERR, "ioctl2(FIONBIO, 0): %m"); - if (cpmip(sep, ctrl) < 0) { - close(ctrl); - continue; - } - if (dofork && - (conn = search_conn(sep, ctrl)) != NULL && - !room_conn(sep, conn)) { - close(ctrl); - continue; - } - } else - ctrl = sep->se_fd; - if (dolog && !ISWRAP(sep)) { - char pname[INET6_ADDRSTRLEN] = "unknown"; - socklen_t sl; - sl = sizeof peermax; - if (getpeername(ctrl, (struct sockaddr *) - &peermax, &sl)) { - sl = sizeof peermax; - if (recvfrom(ctrl, buf, sizeof(buf), - MSG_PEEK, - (struct sockaddr *)&peermax, - &sl) >= 0) { - getnameinfo((struct sockaddr *)&peermax, - peer.sa_len, - pname, sizeof(pname), - NULL, 0, NI_NUMERICHOST); - } - } else { - getnameinfo((struct sockaddr *)&peermax, - peer.sa_len, - pname, sizeof(pname), - NULL, 0, NI_NUMERICHOST); - } - syslog(LOG_INFO,"%s from %s", sep->se_service, pname); - } - (void) sigblock(SIGBLOCK); - pid = 0; - /* - * Fork for all external services, builtins which need to - * fork and anything we're wrapping (as wrapping might - * block or use hosts_options(5) twist). - */ - if (dofork) { - if (sep->se_count++ == 0) - (void)gettimeofday(&sep->se_time, (struct timezone *)NULL); - else if (toomany > 0 && sep->se_count >= toomany) { - struct timeval now; - - (void)gettimeofday(&now, (struct timezone *)NULL); - if (now.tv_sec - sep->se_time.tv_sec > - CNT_INTVL) { - sep->se_time = now; - sep->se_count = 1; - } else { - syslog(LOG_ERR, - "%s/%s server failing (looping), service terminated", - sep->se_service, sep->se_proto); - if (sep->se_accept && - sep->se_socktype == SOCK_STREAM) - close(ctrl); - close_sep(sep); - free_conn(conn); - sigsetmask(0L); - if (!timingout) { - timingout = 1; - alarm(RETRYTIME); - } - continue; - } - } - pid = fork(); - } - if (pid < 0) { - syslog(LOG_ERR, "fork: %m"); - if (sep->se_accept && - sep->se_socktype == SOCK_STREAM) - close(ctrl); - free_conn(conn); - sigsetmask(0L); - sleep(1); - continue; - } - if (pid) { - addchild_conn(conn, pid); - addchild(sep, pid); - } - sigsetmask(0L); - if (pid == 0) { - pidfile_close(pfh); - if (dofork) { - sigaction(SIGALRM, &saalrm, (struct sigaction *)0); - sigaction(SIGCHLD, &sachld, (struct sigaction *)0); - sigaction(SIGHUP, &sahup, (struct sigaction *)0); - /* SIGPIPE reset before exec */ - } - /* - * Call tcpmux to find the real service to exec. - */ - if (sep->se_bi && - sep->se_bi->bi_fn == (bi_fn_t *) tcpmux) { - sep = tcpmux(ctrl); - if (sep == NULL) { - close(ctrl); - _exit(0); - } - } - if (ISWRAP(sep)) { - inetd_setproctitle("wrapping", ctrl); - service = sep->se_server_name ? - sep->se_server_name : sep->se_service; - request_init(&req, RQ_DAEMON, service, RQ_FILE, ctrl, 0); - fromhost(&req); - deny_severity = LIBWRAP_DENY_FACILITY|LIBWRAP_DENY_SEVERITY; - allow_severity = LIBWRAP_ALLOW_FACILITY|LIBWRAP_ALLOW_SEVERITY; - denied = !hosts_access(&req); - if (denied) { - syslog(deny_severity, - "refused connection from %.500s, service %s (%s%s)", - eval_client(&req), service, sep->se_proto, - (whichaf(&req) == AF_INET6) ? "6" : ""); - if (sep->se_socktype != SOCK_STREAM) - recv(ctrl, buf, sizeof (buf), 0); - if (dofork) { - sleep(1); - _exit(0); - } - } - if (dolog) { - syslog(allow_severity, - "connection from %.500s, service %s (%s%s)", - eval_client(&req), service, sep->se_proto, - (whichaf(&req) == AF_INET6) ? "6" : ""); - } - } - if (sep->se_bi) { - (*sep->se_bi->bi_fn)(ctrl, sep); - } else { - if (debug) - warnx("%d execl %s", - getpid(), sep->se_server); - /* Clear close-on-exec. */ - if (fcntl(ctrl, F_SETFD, 0) < 0) { - syslog(LOG_ERR, - "%s/%s: fcntl (F_SETFD, 0): %m", - sep->se_service, sep->se_proto); - _exit(EX_OSERR); - } - if (ctrl != 0) { - dup2(ctrl, 0); - close(ctrl); - } - dup2(0, 1); - dup2(0, 2); - if ((pwd = getpwnam(sep->se_user)) == NULL) { - syslog(LOG_ERR, - "%s/%s: %s: no such user", - sep->se_service, sep->se_proto, - sep->se_user); - if (sep->se_socktype != SOCK_STREAM) - recv(0, buf, sizeof (buf), 0); - _exit(EX_NOUSER); - } - grp = NULL; - if ( sep->se_group != NULL - && (grp = getgrnam(sep->se_group)) == NULL - ) { - syslog(LOG_ERR, - "%s/%s: %s: no such group", - sep->se_service, sep->se_proto, - sep->se_group); - if (sep->se_socktype != SOCK_STREAM) - recv(0, buf, sizeof (buf), 0); - _exit(EX_NOUSER); - } - if (grp != NULL) - pwd->pw_gid = grp->gr_gid; -#ifdef LOGIN_CAP - if ((lc = login_getclass(sep->se_class)) == NULL) { - /* error syslogged by getclass */ - syslog(LOG_ERR, - "%s/%s: %s: login class error", - sep->se_service, sep->se_proto, - sep->se_class); - if (sep->se_socktype != SOCK_STREAM) - recv(0, buf, sizeof (buf), 0); - _exit(EX_NOUSER); - } -#endif - if (setsid() < 0) { - syslog(LOG_ERR, - "%s: can't setsid(): %m", - sep->se_service); - /* _exit(EX_OSERR); not fatal yet */ - } -#ifdef LOGIN_CAP - if (setusercontext(lc, pwd, pwd->pw_uid, - LOGIN_SETALL & ~LOGIN_SETMAC) - != 0) { - syslog(LOG_ERR, - "%s: can't setusercontext(..%s..): %m", - sep->se_service, sep->se_user); - _exit(EX_OSERR); - } - login_close(lc); -#else - if (pwd->pw_uid) { - if (setlogin(sep->se_user) < 0) { - syslog(LOG_ERR, - "%s: can't setlogin(%s): %m", - sep->se_service, sep->se_user); - /* _exit(EX_OSERR); not yet */ - } - if (setgid(pwd->pw_gid) < 0) { - syslog(LOG_ERR, - "%s: can't set gid %d: %m", - sep->se_service, pwd->pw_gid); - _exit(EX_OSERR); - } - (void) initgroups(pwd->pw_name, - pwd->pw_gid); - if (setuid(pwd->pw_uid) < 0) { - syslog(LOG_ERR, - "%s: can't set uid %d: %m", - sep->se_service, pwd->pw_uid); - _exit(EX_OSERR); - } - } -#endif - sigaction(SIGPIPE, &sapipe, - (struct sigaction *)0); - execv(sep->se_server, sep->se_argv); - syslog(LOG_ERR, - "cannot execute %s: %m", sep->se_server); - if (sep->se_socktype != SOCK_STREAM) - recv(0, buf, sizeof (buf), 0); - } - if (dofork) - _exit(0); - } - if (sep->se_accept && sep->se_socktype == SOCK_STREAM) - close(ctrl); - } - } -} - -/* - * Add a signal flag to the signal flag queue for later handling - */ - -void -flag_signal(int c) -{ - char ch = c; - - if (write(signalpipe[1], &ch, 1) != 1) { - syslog(LOG_ERR, "write: %m"); - _exit(EX_OSERR); - } -} - -/* - * Record a new child pid for this service. If we've reached the - * limit on children, then stop accepting incoming requests. - */ - -void -addchild(struct servtab *sep, pid_t pid) -{ - if (sep->se_maxchild <= 0) - return; -#ifdef SANITY_CHECK - if (sep->se_numchild >= sep->se_maxchild) { - syslog(LOG_ERR, "%s: %d >= %d", - __func__, sep->se_numchild, sep->se_maxchild); - exit(EX_SOFTWARE); - } -#endif - sep->se_pids[sep->se_numchild++] = pid; - if (sep->se_numchild == sep->se_maxchild) - disable(sep); -} - -/* - * Some child process has exited. See if it's on somebody's list. - */ - -void -flag_reapchild(int signo __unused) -{ - flag_signal('C'); -} - -void -reapchild(void) -{ - int k, status; - pid_t pid; - struct servtab *sep; - - for (;;) { - pid = wait3(&status, WNOHANG, (struct rusage *)0); - if (pid <= 0) - break; - if (debug) - warnx("%d reaped, %s %u", pid, - WIFEXITED(status) ? "status" : "signal", - WIFEXITED(status) ? WEXITSTATUS(status) - : WTERMSIG(status)); - for (sep = servtab; sep; sep = sep->se_next) { - for (k = 0; k < sep->se_numchild; k++) - if (sep->se_pids[k] == pid) - break; - if (k == sep->se_numchild) - continue; - if (sep->se_numchild == sep->se_maxchild) - enable(sep); - sep->se_pids[k] = sep->se_pids[--sep->se_numchild]; - if (WIFSIGNALED(status) || WEXITSTATUS(status)) - syslog(LOG_WARNING, - "%s[%d]: exited, %s %u", - sep->se_server, pid, - WIFEXITED(status) ? "status" : "signal", - WIFEXITED(status) ? WEXITSTATUS(status) - : WTERMSIG(status)); - break; - } - reapchild_conn(pid); - } -} - -void -flag_config(int signo __unused) -{ - flag_signal('H'); -} - -void -config(void) -{ - struct servtab *sep, *new, **sepp; - long omask; - int new_nomapped; -#ifdef LOGIN_CAP - login_cap_t *lc = NULL; -#endif - - if (!setconfig()) { - syslog(LOG_ERR, "%s: %m", CONFIG); - return; - } - for (sep = servtab; sep; sep = sep->se_next) - sep->se_checked = 0; - while ((new = getconfigent())) { - if (getpwnam(new->se_user) == NULL) { - syslog(LOG_ERR, - "%s/%s: no such user '%s', service ignored", - new->se_service, new->se_proto, new->se_user); - continue; - } - if (new->se_group && getgrnam(new->se_group) == NULL) { - syslog(LOG_ERR, - "%s/%s: no such group '%s', service ignored", - new->se_service, new->se_proto, new->se_group); - continue; - } -#ifdef LOGIN_CAP - if ((lc = login_getclass(new->se_class)) == NULL) { - /* error syslogged by getclass */ - syslog(LOG_ERR, - "%s/%s: %s: login class error, service ignored", - new->se_service, new->se_proto, new->se_class); - continue; - } - login_close(lc); -#endif - new_nomapped = new->se_nomapped; - for (sep = servtab; sep; sep = sep->se_next) - if (strcmp(sep->se_service, new->se_service) == 0 && - strcmp(sep->se_proto, new->se_proto) == 0 && - sep->se_rpc == new->se_rpc && - sep->se_socktype == new->se_socktype && - sep->se_family == new->se_family) - break; - if (sep != 0) { - int i; - -#define SWAP(t,a, b) { t c = a; a = b; b = c; } - omask = sigblock(SIGBLOCK); - if (sep->se_nomapped != new->se_nomapped) { - /* for rpc keep old nommaped till unregister */ - if (!sep->se_rpc) - sep->se_nomapped = new->se_nomapped; - sep->se_reset = 1; - } - /* copy over outstanding child pids */ - if (sep->se_maxchild > 0 && new->se_maxchild > 0) { - new->se_numchild = sep->se_numchild; - if (new->se_numchild > new->se_maxchild) - new->se_numchild = new->se_maxchild; - memcpy(new->se_pids, sep->se_pids, - new->se_numchild * sizeof(*new->se_pids)); - } - SWAP(pid_t *, sep->se_pids, new->se_pids); - sep->se_maxchild = new->se_maxchild; - sep->se_numchild = new->se_numchild; - sep->se_maxcpm = new->se_maxcpm; - resize_conn(sep, new->se_maxperip); - sep->se_maxperip = new->se_maxperip; - sep->se_bi = new->se_bi; - /* might need to turn on or off service now */ - if (sep->se_fd >= 0) { - if (sep->se_maxchild > 0 - && sep->se_numchild == sep->se_maxchild) { - if (FD_ISSET(sep->se_fd, &allsock)) - disable(sep); - } else { - if (!FD_ISSET(sep->se_fd, &allsock)) - enable(sep); - } - } - sep->se_accept = new->se_accept; - SWAP(char *, sep->se_user, new->se_user); - SWAP(char *, sep->se_group, new->se_group); -#ifdef LOGIN_CAP - SWAP(char *, sep->se_class, new->se_class); -#endif - SWAP(char *, sep->se_server, new->se_server); - SWAP(char *, sep->se_server_name, new->se_server_name); - for (i = 0; i < MAXARGV; i++) - SWAP(char *, sep->se_argv[i], new->se_argv[i]); -#ifdef IPSEC - SWAP(char *, sep->se_policy, new->se_policy); - ipsecsetup(sep); -#endif - sigsetmask(omask); - freeconfig(new); - if (debug) - print_service("REDO", sep); - } else { - sep = enter(new); - if (debug) - print_service("ADD ", sep); - } - sep->se_checked = 1; - if (ISMUX(sep)) { - sep->se_fd = -1; - continue; - } - switch (sep->se_family) { - case AF_INET: - if (!v4bind_ok) { - sep->se_fd = -1; - continue; - } - break; -#ifdef INET6 - case AF_INET6: - if (!v6bind_ok) { - sep->se_fd = -1; - continue; - } - break; -#endif - } - if (!sep->se_rpc) { - if (sep->se_family != AF_UNIX) { - sp = getservbyname(sep->se_service, sep->se_proto); - if (sp == 0) { - syslog(LOG_ERR, "%s/%s: unknown service", - sep->se_service, sep->se_proto); - sep->se_checked = 0; - continue; - } - } - switch (sep->se_family) { - case AF_INET: - if (sp->s_port != sep->se_ctrladdr4.sin_port) { - sep->se_ctrladdr4.sin_port = - sp->s_port; - sep->se_reset = 1; - } - break; -#ifdef INET6 - case AF_INET6: - if (sp->s_port != - sep->se_ctrladdr6.sin6_port) { - sep->se_ctrladdr6.sin6_port = - sp->s_port; - sep->se_reset = 1; - } - break; -#endif - } - if (sep->se_reset != 0 && sep->se_fd >= 0) - close_sep(sep); - } else { - rpc = getrpcbyname(sep->se_service); - if (rpc == 0) { - syslog(LOG_ERR, "%s/%s unknown RPC service", - sep->se_service, sep->se_proto); - if (sep->se_fd != -1) - (void) close(sep->se_fd); - sep->se_fd = -1; - continue; - } - if (sep->se_reset != 0 || - rpc->r_number != sep->se_rpc_prog) { - if (sep->se_rpc_prog) - unregisterrpc(sep); - sep->se_rpc_prog = rpc->r_number; - if (sep->se_fd != -1) - (void) close(sep->se_fd); - sep->se_fd = -1; - } - sep->se_nomapped = new_nomapped; - } - sep->se_reset = 0; - if (sep->se_fd == -1) - setup(sep); - } - endconfig(); - /* - * Purge anything not looked at above. - */ - omask = sigblock(SIGBLOCK); - sepp = &servtab; - while ((sep = *sepp)) { - if (sep->se_checked) { - sepp = &sep->se_next; - continue; - } - *sepp = sep->se_next; - if (sep->se_fd >= 0) - close_sep(sep); - if (debug) - print_service("FREE", sep); - if (sep->se_rpc && sep->se_rpc_prog > 0) - unregisterrpc(sep); - freeconfig(sep); - free(sep); - } - (void) sigsetmask(omask); -} - -void -unregisterrpc(struct servtab *sep) -{ - u_int i; - struct servtab *sepp; - long omask; - struct netconfig *netid4, *netid6; - - omask = sigblock(SIGBLOCK); - netid4 = sep->se_socktype == SOCK_DGRAM ? udpconf : tcpconf; - netid6 = sep->se_socktype == SOCK_DGRAM ? udp6conf : tcp6conf; - if (sep->se_family == AF_INET) - netid6 = NULL; - else if (sep->se_nomapped) - netid4 = NULL; - /* - * Conflict if same prog and protocol - In that case one should look - * to versions, but it is not interesting: having separate servers for - * different versions does not work well. - * Therefore one do not unregister if there is a conflict. - * There is also transport conflict if destroying INET when INET46 - * exists, or destroying INET46 when INET exists - */ - for (sepp = servtab; sepp; sepp = sepp->se_next) { - if (sepp == sep) - continue; - if (sepp->se_checked == 0 || - !sepp->se_rpc || - strcmp(sep->se_proto, sepp->se_proto) != 0 || - sep->se_rpc_prog != sepp->se_rpc_prog) - continue; - if (sepp->se_family == AF_INET) - netid4 = NULL; - if (sepp->se_family == AF_INET6) { - netid6 = NULL; - if (!sep->se_nomapped) - netid4 = NULL; - } - if (netid4 == NULL && netid6 == NULL) - return; - } - if (debug) - print_service("UNREG", sep); - for (i = sep->se_rpc_lowvers; i <= sep->se_rpc_highvers; i++) { - if (netid4) - rpcb_unset(sep->se_rpc_prog, i, netid4); - if (netid6) - rpcb_unset(sep->se_rpc_prog, i, netid6); - } - if (sep->se_fd != -1) - (void) close(sep->se_fd); - sep->se_fd = -1; - (void) sigsetmask(omask); -} - -void -flag_retry(int signo __unused) -{ - flag_signal('A'); -} - -void -retry(void) -{ - struct servtab *sep; - - timingout = 0; - for (sep = servtab; sep; sep = sep->se_next) - if (sep->se_fd == -1 && !ISMUX(sep)) - setup(sep); -} - -void -setup(struct servtab *sep) -{ - int on = 1; - - if ((sep->se_fd = socket(sep->se_family, sep->se_socktype, 0)) < 0) { - if (debug) - warn("socket failed on %s/%s", - sep->se_service, sep->se_proto); - syslog(LOG_ERR, "%s/%s: socket: %m", - sep->se_service, sep->se_proto); - return; - } - /* Set all listening sockets to close-on-exec. */ - if (fcntl(sep->se_fd, F_SETFD, FD_CLOEXEC) < 0) { - syslog(LOG_ERR, "%s/%s: fcntl (F_SETFD, FD_CLOEXEC): %m", - sep->se_service, sep->se_proto); - close(sep->se_fd); - return; - } -#define turnon(fd, opt) \ -setsockopt(fd, SOL_SOCKET, opt, (char *)&on, sizeof (on)) - if (strcmp(sep->se_proto, "tcp") == 0 && (options & SO_DEBUG) && - turnon(sep->se_fd, SO_DEBUG) < 0) - syslog(LOG_ERR, "setsockopt (SO_DEBUG): %m"); - if (turnon(sep->se_fd, SO_REUSEADDR) < 0) - syslog(LOG_ERR, "setsockopt (SO_REUSEADDR): %m"); -#ifdef SO_PRIVSTATE - if (turnon(sep->se_fd, SO_PRIVSTATE) < 0) - syslog(LOG_ERR, "setsockopt (SO_PRIVSTATE): %m"); -#endif - /* tftpd opens a new connection then needs more infos */ - if ((sep->se_family == AF_INET6) && - (strcmp(sep->se_proto, "udp") == 0) && - (sep->se_accept == 0) && - (setsockopt(sep->se_fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, - (char *)&on, sizeof (on)) < 0)) - syslog(LOG_ERR, "setsockopt (IPV6_RECVPKTINFO): %m"); - if (sep->se_family == AF_INET6) { - int flag = sep->se_nomapped ? 1 : 0; - if (setsockopt(sep->se_fd, IPPROTO_IPV6, IPV6_V6ONLY, - (char *)&flag, sizeof (flag)) < 0) - syslog(LOG_ERR, "setsockopt (IPV6_V6ONLY): %m"); - } -#undef turnon -#ifdef IPV6_FAITH - if (sep->se_type == FAITH_TYPE) { - if (setsockopt(sep->se_fd, IPPROTO_IPV6, IPV6_FAITH, &on, - sizeof(on)) < 0) { - syslog(LOG_ERR, "setsockopt (IPV6_FAITH): %m"); - } - } -#endif -#ifdef IPSEC - ipsecsetup(sep); -#endif - if (sep->se_family == AF_UNIX) { - (void) unlink(sep->se_ctrladdr_un.sun_path); - umask(0777); /* Make socket with conservative permissions */ - } - if (bind(sep->se_fd, (struct sockaddr *)&sep->se_ctrladdr, - sep->se_ctrladdr_size) < 0) { - if (debug) - warn("bind failed on %s/%s", - sep->se_service, sep->se_proto); - syslog(LOG_ERR, "%s/%s: bind: %m", - sep->se_service, sep->se_proto); - (void) close(sep->se_fd); - sep->se_fd = -1; - if (!timingout) { - timingout = 1; - alarm(RETRYTIME); - } - if (sep->se_family == AF_UNIX) - umask(mask); - return; - } - if (sep->se_family == AF_UNIX) { - /* Ick - fch{own,mod} don't work on Unix domain sockets */ - if (chown(sep->se_service, sep->se_sockuid, sep->se_sockgid) < 0) - syslog(LOG_ERR, "chown socket: %m"); - if (chmod(sep->se_service, sep->se_sockmode) < 0) - syslog(LOG_ERR, "chmod socket: %m"); - umask(mask); - } - if (sep->se_rpc) { - u_int i; - socklen_t len = sep->se_ctrladdr_size; - struct netconfig *netid, *netid2 = NULL; - struct sockaddr_in sock; - struct netbuf nbuf, nbuf2; - - if (getsockname(sep->se_fd, - (struct sockaddr*)&sep->se_ctrladdr, &len) < 0){ - syslog(LOG_ERR, "%s/%s: getsockname: %m", - sep->se_service, sep->se_proto); - (void) close(sep->se_fd); - sep->se_fd = -1; - return; - } - nbuf.buf = &sep->se_ctrladdr; - nbuf.len = sep->se_ctrladdr.sa_len; - if (sep->se_family == AF_INET) - netid = sep->se_socktype==SOCK_DGRAM? udpconf:tcpconf; - else { - netid = sep->se_socktype==SOCK_DGRAM? udp6conf:tcp6conf; - if (!sep->se_nomapped) { /* INET and INET6 */ - netid2 = netid==udp6conf? udpconf:tcpconf; - memset(&sock, 0, sizeof sock); /* ADDR_ANY */ - nbuf2.buf = &sock; - nbuf2.len = sock.sin_len = sizeof sock; - sock.sin_family = AF_INET; - sock.sin_port = sep->se_ctrladdr6.sin6_port; - } - } - if (debug) - print_service("REG ", sep); - for (i = sep->se_rpc_lowvers; i <= sep->se_rpc_highvers; i++) { - rpcb_unset(sep->se_rpc_prog, i, netid); - rpcb_set(sep->se_rpc_prog, i, netid, &nbuf); - if (netid2) { - rpcb_unset(sep->se_rpc_prog, i, netid2); - rpcb_set(sep->se_rpc_prog, i, netid2, &nbuf2); - } - } - } - if (sep->se_socktype == SOCK_STREAM) - listen(sep->se_fd, 64); - enable(sep); - if (debug) { - warnx("registered %s on %d", - sep->se_server, sep->se_fd); - } -} - -#ifdef IPSEC -void -ipsecsetup(struct servtab *sep) -{ - char *buf; - char *policy_in = NULL; - char *policy_out = NULL; - int level; - int opt; - - switch (sep->se_family) { - case AF_INET: - level = IPPROTO_IP; - opt = IP_IPSEC_POLICY; - break; -#ifdef INET6 - case AF_INET6: - level = IPPROTO_IPV6; - opt = IPV6_IPSEC_POLICY; - break; -#endif - default: - return; - } - - if (!sep->se_policy || sep->se_policy[0] == '\0') { - static char def_in[] = "in entrust", def_out[] = "out entrust"; - policy_in = def_in; - policy_out = def_out; - } else { - if (!strncmp("in", sep->se_policy, 2)) - policy_in = sep->se_policy; - else if (!strncmp("out", sep->se_policy, 3)) - policy_out = sep->se_policy; - else { - syslog(LOG_ERR, "invalid security policy \"%s\"", - sep->se_policy); - return; - } - } - - if (policy_in != NULL) { - buf = ipsec_set_policy(policy_in, strlen(policy_in)); - if (buf != NULL) { - if (setsockopt(sep->se_fd, level, opt, - buf, ipsec_get_policylen(buf)) < 0 && - debug != 0) - warnx("%s/%s: ipsec initialization failed; %s", - sep->se_service, sep->se_proto, - policy_in); - free(buf); - } else - syslog(LOG_ERR, "invalid security policy \"%s\"", - policy_in); - } - if (policy_out != NULL) { - buf = ipsec_set_policy(policy_out, strlen(policy_out)); - if (buf != NULL) { - if (setsockopt(sep->se_fd, level, opt, - buf, ipsec_get_policylen(buf)) < 0 && - debug != 0) - warnx("%s/%s: ipsec initialization failed; %s", - sep->se_service, sep->se_proto, - policy_out); - free(buf); - } else - syslog(LOG_ERR, "invalid security policy \"%s\"", - policy_out); - } -} -#endif - -/* - * Finish with a service and its socket. - */ -void -close_sep(struct servtab *sep) -{ - if (sep->se_fd >= 0) { - if (FD_ISSET(sep->se_fd, &allsock)) - disable(sep); - (void) close(sep->se_fd); - sep->se_fd = -1; - } - sep->se_count = 0; - sep->se_numchild = 0; /* forget about any existing children */ -} - -int -matchservent(const char *name1, const char *name2, const char *proto) -{ - char **alias, *p; - struct servent *se; - - if (strcmp(proto, "unix") == 0) { - if ((p = strrchr(name1, '/')) != NULL) - name1 = p + 1; - if ((p = strrchr(name2, '/')) != NULL) - name2 = p + 1; - } - if (strcmp(name1, name2) == 0) - return(1); - if ((se = getservbyname(name1, proto)) != NULL) { - if (strcmp(name2, se->s_name) == 0) - return(1); - for (alias = se->s_aliases; *alias; alias++) - if (strcmp(name2, *alias) == 0) - return(1); - } - return(0); -} - -struct servtab * -enter(struct servtab *cp) -{ - struct servtab *sep; - long omask; - - sep = (struct servtab *)malloc(sizeof (*sep)); - if (sep == (struct servtab *)0) { - syslog(LOG_ERR, "malloc: %m"); - exit(EX_OSERR); - } - *sep = *cp; - sep->se_fd = -1; - omask = sigblock(SIGBLOCK); - sep->se_next = servtab; - servtab = sep; - sigsetmask(omask); - return (sep); -} - -void -enable(struct servtab *sep) -{ - if (debug) - warnx( - "enabling %s, fd %d", sep->se_service, sep->se_fd); -#ifdef SANITY_CHECK - if (sep->se_fd < 0) { - syslog(LOG_ERR, - "%s: %s: bad fd", __func__, sep->se_service); - exit(EX_SOFTWARE); - } - if (ISMUX(sep)) { - syslog(LOG_ERR, - "%s: %s: is mux", __func__, sep->se_service); - exit(EX_SOFTWARE); - } - if (FD_ISSET(sep->se_fd, &allsock)) { - syslog(LOG_ERR, - "%s: %s: not off", __func__, sep->se_service); - exit(EX_SOFTWARE); - } - nsock++; -#endif - FD_SET(sep->se_fd, &allsock); - if (sep->se_fd > maxsock) - maxsock = sep->se_fd; -} - -void -disable(struct servtab *sep) -{ - if (debug) - warnx( - "disabling %s, fd %d", sep->se_service, sep->se_fd); -#ifdef SANITY_CHECK - if (sep->se_fd < 0) { - syslog(LOG_ERR, - "%s: %s: bad fd", __func__, sep->se_service); - exit(EX_SOFTWARE); - } - if (ISMUX(sep)) { - syslog(LOG_ERR, - "%s: %s: is mux", __func__, sep->se_service); - exit(EX_SOFTWARE); - } - if (!FD_ISSET(sep->se_fd, &allsock)) { - syslog(LOG_ERR, - "%s: %s: not on", __func__, sep->se_service); - exit(EX_SOFTWARE); - } - if (nsock == 0) { - syslog(LOG_ERR, "%s: nsock=0", __func__); - exit(EX_SOFTWARE); - } - nsock--; -#endif - FD_CLR(sep->se_fd, &allsock); - if (sep->se_fd == maxsock) - maxsock--; -} - -FILE *fconfig = NULL; -struct servtab serv; -char line[LINE_MAX]; - -int -setconfig(void) -{ - - if (fconfig != NULL) { - fseek(fconfig, 0L, SEEK_SET); - return (1); - } - fconfig = fopen(CONFIG, "r"); - return (fconfig != NULL); -} - -void -endconfig(void) -{ - if (fconfig) { - (void) fclose(fconfig); - fconfig = NULL; - } -} - -struct servtab * -getconfigent(void) -{ - struct servtab *sep = &serv; - int argc; - char *cp, *arg, *s; - char *versp; - static char TCPMUX_TOKEN[] = "tcpmux/"; -#define MUX_LEN (sizeof(TCPMUX_TOKEN)-1) -#ifdef IPSEC - char *policy; -#endif - int v4bind; -#ifdef INET6 - int v6bind; -#endif - int i; - -#ifdef IPSEC - policy = NULL; -#endif -more: - v4bind = 0; -#ifdef INET6 - v6bind = 0; -#endif - while ((cp = nextline(fconfig)) != NULL) { -#ifdef IPSEC - /* lines starting with #@ is not a comment, but the policy */ - if (cp[0] == '#' && cp[1] == '@') { - char *p; - for (p = cp + 2; p && *p && isspace(*p); p++) - ; - if (*p == '\0') { - if (policy) - free(policy); - policy = NULL; - } else if (ipsec_get_policylen(p) >= 0) { - if (policy) - free(policy); - policy = newstr(p); - } else { - syslog(LOG_ERR, - "%s: invalid ipsec policy \"%s\"", - CONFIG, p); - exit(EX_CONFIG); - } - } -#endif - if (*cp == '#' || *cp == '\0') - continue; - break; - } - if (cp == NULL) - return ((struct servtab *)0); - /* - * clear the static buffer, since some fields (se_ctrladdr, - * for example) don't get initialized here. - */ - memset(sep, 0, sizeof *sep); - arg = skip(&cp); - if (cp == NULL) { - /* got an empty line containing just blanks/tabs. */ - goto more; - } - if (arg[0] == ':') { /* :user:group:perm: */ - char *user, *group, *perm; - struct passwd *pw; - struct group *gr; - user = arg+1; - if ((group = strchr(user, ':')) == NULL) { - syslog(LOG_ERR, "no group after user '%s'", user); - goto more; - } - *group++ = '\0'; - if ((perm = strchr(group, ':')) == NULL) { - syslog(LOG_ERR, "no mode after group '%s'", group); - goto more; - } - *perm++ = '\0'; - if ((pw = getpwnam(user)) == NULL) { - syslog(LOG_ERR, "no such user '%s'", user); - goto more; - } - sep->se_sockuid = pw->pw_uid; - if ((gr = getgrnam(group)) == NULL) { - syslog(LOG_ERR, "no such user '%s'", group); - goto more; - } - sep->se_sockgid = gr->gr_gid; - sep->se_sockmode = strtol(perm, &arg, 8); - if (*arg != ':') { - syslog(LOG_ERR, "bad mode '%s'", perm); - goto more; - } - *arg++ = '\0'; - } else { - sep->se_sockuid = euid; - sep->se_sockgid = egid; - sep->se_sockmode = 0200; - } - if (strncmp(arg, TCPMUX_TOKEN, MUX_LEN) == 0) { - char *c = arg + MUX_LEN; - if (*c == '+') { - sep->se_type = MUXPLUS_TYPE; - c++; - } else - sep->se_type = MUX_TYPE; - sep->se_service = newstr(c); - } else { - sep->se_service = newstr(arg); - sep->se_type = NORM_TYPE; - } - arg = sskip(&cp); - if (strcmp(arg, "stream") == 0) - sep->se_socktype = SOCK_STREAM; - else if (strcmp(arg, "dgram") == 0) - sep->se_socktype = SOCK_DGRAM; - else if (strcmp(arg, "rdm") == 0) - sep->se_socktype = SOCK_RDM; - else if (strcmp(arg, "seqpacket") == 0) - sep->se_socktype = SOCK_SEQPACKET; - else if (strcmp(arg, "raw") == 0) - sep->se_socktype = SOCK_RAW; - else - sep->se_socktype = -1; - - arg = sskip(&cp); - if (strncmp(arg, "tcp", 3) == 0) { - sep->se_proto = newstr(strsep(&arg, "/")); - if (arg != NULL) { - if (strcmp(arg, "faith") == 0) - sep->se_type = FAITH_TYPE; - } - } else { - if (sep->se_type == NORM_TYPE && - strncmp(arg, "faith/", 6) == 0) { - arg += 6; - sep->se_type = FAITH_TYPE; - } - sep->se_proto = newstr(arg); - } - if (strncmp(sep->se_proto, "rpc/", 4) == 0) { - memmove(sep->se_proto, sep->se_proto + 4, - strlen(sep->se_proto) + 1 - 4); - sep->se_rpc = 1; - sep->se_rpc_prog = sep->se_rpc_lowvers = - sep->se_rpc_lowvers = 0; - memcpy(&sep->se_ctrladdr4, bind_sa4, - sizeof(sep->se_ctrladdr4)); - if ((versp = rindex(sep->se_service, '/'))) { - *versp++ = '\0'; - switch (sscanf(versp, "%u-%u", - &sep->se_rpc_lowvers, - &sep->se_rpc_highvers)) { - case 2: - break; - case 1: - sep->se_rpc_highvers = - sep->se_rpc_lowvers; - break; - default: - syslog(LOG_ERR, - "bad RPC version specifier; %s", - sep->se_service); - freeconfig(sep); - goto more; - } - } - else { - sep->se_rpc_lowvers = - sep->se_rpc_highvers = 1; - } - } - sep->se_nomapped = 0; - if (strcmp(sep->se_proto, "unix") == 0) { - sep->se_family = AF_UNIX; - } else { - while (isdigit(sep->se_proto[strlen(sep->se_proto) - 1])) { -#ifdef INET6 - if (sep->se_proto[strlen(sep->se_proto) - 1] == '6') { - sep->se_proto[strlen(sep->se_proto) - 1] = '\0'; - v6bind = 1; - continue; - } -#endif - if (sep->se_proto[strlen(sep->se_proto) - 1] == '4') { - sep->se_proto[strlen(sep->se_proto) - 1] = '\0'; - v4bind = 1; - continue; - } - /* illegal version num */ - syslog(LOG_ERR, "bad IP version for %s", sep->se_proto); - freeconfig(sep); - goto more; - } -#ifdef INET6 - if (v6bind && !v6bind_ok) { - syslog(LOG_INFO, "IPv6 bind is ignored for %s", - sep->se_service); - if (v4bind && v4bind_ok) - v6bind = 0; - else { - freeconfig(sep); - goto more; - } - } - if (v6bind) { - sep->se_family = AF_INET6; - if (!v4bind || !v4bind_ok) - sep->se_nomapped = 1; - } else -#endif - { /* default to v4 bind if not v6 bind */ - if (!v4bind_ok) { - syslog(LOG_NOTICE, "IPv4 bind is ignored for %s", - sep->se_service); - freeconfig(sep); - goto more; - } - sep->se_family = AF_INET; - } - } - /* init ctladdr */ - switch(sep->se_family) { - case AF_INET: - memcpy(&sep->se_ctrladdr4, bind_sa4, - sizeof(sep->se_ctrladdr4)); - sep->se_ctrladdr_size = sizeof(sep->se_ctrladdr4); - break; -#ifdef INET6 - case AF_INET6: - memcpy(&sep->se_ctrladdr6, bind_sa6, - sizeof(sep->se_ctrladdr6)); - sep->se_ctrladdr_size = sizeof(sep->se_ctrladdr6); - break; -#endif - case AF_UNIX: - if (strlen(sep->se_service) >= sizeof(sep->se_ctrladdr_un.sun_path)) { - syslog(LOG_ERR, - "domain socket pathname too long for service %s", - sep->se_service); - goto more; - } - memset(&sep->se_ctrladdr, 0, sizeof(sep->se_ctrladdr)); - sep->se_ctrladdr_un.sun_family = sep->se_family; - sep->se_ctrladdr_un.sun_len = strlen(sep->se_service); - strcpy(sep->se_ctrladdr_un.sun_path, sep->se_service); - sep->se_ctrladdr_size = SUN_LEN(&sep->se_ctrladdr_un); - } - arg = sskip(&cp); - if (!strncmp(arg, "wait", 4)) - sep->se_accept = 0; - else if (!strncmp(arg, "nowait", 6)) - sep->se_accept = 1; - else { - syslog(LOG_ERR, - "%s: bad wait/nowait for service %s", - CONFIG, sep->se_service); - goto more; - } - sep->se_maxchild = -1; - sep->se_maxcpm = -1; - sep->se_maxperip = -1; - if ((s = strchr(arg, '/')) != NULL) { - char *eptr; - u_long val; - - val = strtoul(s + 1, &eptr, 10); - if (eptr == s + 1 || val > MAX_MAXCHLD) { - syslog(LOG_ERR, - "%s: bad max-child for service %s", - CONFIG, sep->se_service); - goto more; - } - if (debug) - if (!sep->se_accept && val != 1) - warnx("maxchild=%lu for wait service %s" - " not recommended", val, sep->se_service); - sep->se_maxchild = val; - if (*eptr == '/') - sep->se_maxcpm = strtol(eptr + 1, &eptr, 10); - if (*eptr == '/') - sep->se_maxperip = strtol(eptr + 1, &eptr, 10); - /* - * explicitly do not check for \0 for future expansion / - * backwards compatibility - */ - } - if (ISMUX(sep)) { - /* - * Silently enforce "nowait" mode for TCPMUX services - * since they don't have an assigned port to listen on. - */ - sep->se_accept = 1; - if (strcmp(sep->se_proto, "tcp")) { - syslog(LOG_ERR, - "%s: bad protocol for tcpmux service %s", - CONFIG, sep->se_service); - goto more; - } - if (sep->se_socktype != SOCK_STREAM) { - syslog(LOG_ERR, - "%s: bad socket type for tcpmux service %s", - CONFIG, sep->se_service); - goto more; - } - } - sep->se_user = newstr(sskip(&cp)); -#ifdef LOGIN_CAP - if ((s = strrchr(sep->se_user, '/')) != NULL) { - *s = '\0'; - sep->se_class = newstr(s + 1); - } else - sep->se_class = newstr(RESOURCE_RC); -#endif - if ((s = strrchr(sep->se_user, ':')) != NULL) { - *s = '\0'; - sep->se_group = newstr(s + 1); - } else - sep->se_group = NULL; - sep->se_server = newstr(sskip(&cp)); - if ((sep->se_server_name = rindex(sep->se_server, '/'))) - sep->se_server_name++; - if (strcmp(sep->se_server, "internal") == 0) { - struct biltin *bi; - - for (bi = biltins; bi->bi_service; bi++) - if (bi->bi_socktype == sep->se_socktype && - matchservent(bi->bi_service, sep->se_service, - sep->se_proto)) - break; - if (bi->bi_service == 0) { - syslog(LOG_ERR, "internal service %s unknown", - sep->se_service); - goto more; - } - sep->se_accept = 1; /* force accept mode for built-ins */ - sep->se_bi = bi; - } else - sep->se_bi = NULL; - if (sep->se_maxperip < 0) - sep->se_maxperip = maxperip; - if (sep->se_maxcpm < 0) - sep->se_maxcpm = maxcpm; - if (sep->se_maxchild < 0) { /* apply default max-children */ - if (sep->se_bi && sep->se_bi->bi_maxchild >= 0) - sep->se_maxchild = sep->se_bi->bi_maxchild; - else if (sep->se_accept) - sep->se_maxchild = maxchild > 0 ? maxchild : 0; - else - sep->se_maxchild = 1; - } - if (sep->se_maxchild > 0) { - sep->se_pids = malloc(sep->se_maxchild * sizeof(*sep->se_pids)); - if (sep->se_pids == NULL) { - syslog(LOG_ERR, "malloc: %m"); - exit(EX_OSERR); - } - } - argc = 0; - for (arg = skip(&cp); cp; arg = skip(&cp)) - if (argc < MAXARGV) { - sep->se_argv[argc++] = newstr(arg); - } else { - syslog(LOG_ERR, - "%s: too many arguments for service %s", - CONFIG, sep->se_service); - goto more; - } - while (argc <= MAXARGV) - sep->se_argv[argc++] = NULL; - for (i = 0; i < PERIPSIZE; ++i) - LIST_INIT(&sep->se_conn[i]); -#ifdef IPSEC - sep->se_policy = policy ? newstr(policy) : NULL; -#endif - return (sep); -} - -void -freeconfig(struct servtab *cp) -{ - int i; - - if (cp->se_service) - free(cp->se_service); - if (cp->se_proto) - free(cp->se_proto); - if (cp->se_user) - free(cp->se_user); - if (cp->se_group) - free(cp->se_group); -#ifdef LOGIN_CAP - if (cp->se_class) - free(cp->se_class); -#endif - if (cp->se_server) - free(cp->se_server); - if (cp->se_pids) - free(cp->se_pids); - for (i = 0; i < MAXARGV; i++) - if (cp->se_argv[i]) - free(cp->se_argv[i]); - free_connlist(cp); -#ifdef IPSEC - if (cp->se_policy) - free(cp->se_policy); -#endif -} - - -/* - * Safe skip - if skip returns null, log a syntax error in the - * configuration file and exit. - */ -char * -sskip(char **cpp) -{ - char *cp; - - cp = skip(cpp); - if (cp == NULL) { - syslog(LOG_ERR, "%s: syntax error", CONFIG); - exit(EX_DATAERR); - } - return (cp); -} - -char * -skip(char **cpp) -{ - char *cp = *cpp; - char *start; - char quote = '\0'; - -again: - while (*cp == ' ' || *cp == '\t') - cp++; - if (*cp == '\0') { - int c; - - c = getc(fconfig); - (void) ungetc(c, fconfig); - if (c == ' ' || c == '\t') - if ((cp = nextline(fconfig))) - goto again; - *cpp = (char *)0; - return ((char *)0); - } - if (*cp == '"' || *cp == '\'') - quote = *cp++; - start = cp; - if (quote) - while (*cp && *cp != quote) - cp++; - else - while (*cp && *cp != ' ' && *cp != '\t') - cp++; - if (*cp != '\0') - *cp++ = '\0'; - *cpp = cp; - return (start); -} - -char * -nextline(FILE *fd) -{ - char *cp; - - if (fgets(line, sizeof (line), fd) == NULL) - return ((char *)0); - cp = strchr(line, '\n'); - if (cp) - *cp = '\0'; - return (line); -} - -char * -newstr(const char *cp) -{ - char *cr; - - if ((cr = strdup(cp != NULL ? cp : ""))) - return (cr); - syslog(LOG_ERR, "strdup: %m"); - exit(EX_OSERR); -} - -void -inetd_setproctitle(const char *a, int s) -{ - socklen_t size; - struct sockaddr_storage ss; - char buf[80], pbuf[INET6_ADDRSTRLEN]; - - size = sizeof(ss); - if (getpeername(s, (struct sockaddr *)&ss, &size) == 0) { - getnameinfo((struct sockaddr *)&ss, size, pbuf, sizeof(pbuf), - NULL, 0, NI_NUMERICHOST); - (void) sprintf(buf, "%s [%s]", a, pbuf); - } else - (void) sprintf(buf, "%s", a); - setproctitle("%s", buf); -} - -int -check_loop(const struct sockaddr *sa, const struct servtab *sep) -{ - struct servtab *se2; - char pname[INET6_ADDRSTRLEN]; - - for (se2 = servtab; se2; se2 = se2->se_next) { - if (!se2->se_bi || se2->se_socktype != SOCK_DGRAM) - continue; - - switch (se2->se_family) { - case AF_INET: - if (((const struct sockaddr_in *)sa)->sin_port == - se2->se_ctrladdr4.sin_port) - goto isloop; - continue; -#ifdef INET6 - case AF_INET6: - if (((const struct sockaddr_in *)sa)->sin_port == - se2->se_ctrladdr4.sin_port) - goto isloop; - continue; -#endif - default: - continue; - } - isloop: - getnameinfo(sa, sa->sa_len, pname, sizeof(pname), NULL, 0, - NI_NUMERICHOST); - syslog(LOG_WARNING, "%s/%s:%s/%s loop request REFUSED from %s", - sep->se_service, sep->se_proto, - se2->se_service, se2->se_proto, - pname); - return 1; - } - return 0; -} - -/* - * print_service: - * Dump relevant information to stderr - */ -void -print_service(const char *action, const struct servtab *sep) -{ - fprintf(stderr, - "%s: %s proto=%s accept=%d max=%d user=%s group=%s" -#ifdef LOGIN_CAP - "class=%s" -#endif - " builtin=%p server=%s" -#ifdef IPSEC - " policy=\"%s\"" -#endif - "\n", - action, sep->se_service, sep->se_proto, - sep->se_accept, sep->se_maxchild, sep->se_user, sep->se_group, -#ifdef LOGIN_CAP - sep->se_class, -#endif - (void *) sep->se_bi, sep->se_server -#ifdef IPSEC - , (sep->se_policy ? sep->se_policy : "") -#endif - ); -} - -#define CPMHSIZE 256 -#define CPMHMASK (CPMHSIZE-1) -#define CHTGRAN 10 -#define CHTSIZE 6 - -typedef struct CTime { - unsigned long ct_Ticks; - int ct_Count; -} CTime; - -typedef struct CHash { - union { - struct in_addr c4_Addr; - struct in6_addr c6_Addr; - } cu_Addr; -#define ch_Addr4 cu_Addr.c4_Addr -#define ch_Addr6 cu_Addr.c6_Addr - int ch_Family; - time_t ch_LTime; - char *ch_Service; - CTime ch_Times[CHTSIZE]; -} CHash; - -CHash CHashAry[CPMHSIZE]; - -int -cpmip(const struct servtab *sep, int ctrl) -{ - struct sockaddr_storage rss; - socklen_t rssLen = sizeof(rss); - int r = 0; - - /* - * If getpeername() fails, just let it through (if logging is - * enabled the condition is caught elsewhere) - */ - - if (sep->se_maxcpm > 0 && - (sep->se_family == AF_INET || sep->se_family == AF_INET6) && - getpeername(ctrl, (struct sockaddr *)&rss, &rssLen) == 0 ) { - time_t t = time(NULL); - int hv = 0xABC3D20F; - int i; - int cnt = 0; - CHash *chBest = NULL; - unsigned int ticks = t / CHTGRAN; - struct sockaddr_in *sin4; -#ifdef INET6 - struct sockaddr_in6 *sin6; -#endif - - sin4 = (struct sockaddr_in *)&rss; -#ifdef INET6 - sin6 = (struct sockaddr_in6 *)&rss; -#endif - { - char *p; - int addrlen; - - switch (rss.ss_family) { - case AF_INET: - p = (char *)&sin4->sin_addr; - addrlen = sizeof(struct in_addr); - break; -#ifdef INET6 - case AF_INET6: - p = (char *)&sin6->sin6_addr; - addrlen = sizeof(struct in6_addr); - break; -#endif - default: - /* should not happen */ - return -1; - } - - for (i = 0; i < addrlen; ++i, ++p) { - hv = (hv << 5) ^ (hv >> 23) ^ *p; - } - hv = (hv ^ (hv >> 16)); - } - for (i = 0; i < 5; ++i) { - CHash *ch = &CHashAry[(hv + i) & CPMHMASK]; - - if (rss.ss_family == AF_INET && - ch->ch_Family == AF_INET && - sin4->sin_addr.s_addr == ch->ch_Addr4.s_addr && - ch->ch_Service && strcmp(sep->se_service, - ch->ch_Service) == 0) { - chBest = ch; - break; - } -#ifdef INET6 - if (rss.ss_family == AF_INET6 && - ch->ch_Family == AF_INET6 && - IN6_ARE_ADDR_EQUAL(&sin6->sin6_addr, - &ch->ch_Addr6) != 0 && - ch->ch_Service && strcmp(sep->se_service, - ch->ch_Service) == 0) { - chBest = ch; - break; - } -#endif - if (chBest == NULL || ch->ch_LTime == 0 || - ch->ch_LTime < chBest->ch_LTime) { - chBest = ch; - } - } - if ((rss.ss_family == AF_INET && - (chBest->ch_Family != AF_INET || - sin4->sin_addr.s_addr != chBest->ch_Addr4.s_addr)) || - chBest->ch_Service == NULL || - strcmp(sep->se_service, chBest->ch_Service) != 0) { - chBest->ch_Family = sin4->sin_family; - chBest->ch_Addr4 = sin4->sin_addr; - if (chBest->ch_Service) - free(chBest->ch_Service); - chBest->ch_Service = strdup(sep->se_service); - bzero(chBest->ch_Times, sizeof(chBest->ch_Times)); - } -#ifdef INET6 - if ((rss.ss_family == AF_INET6 && - (chBest->ch_Family != AF_INET6 || - IN6_ARE_ADDR_EQUAL(&sin6->sin6_addr, - &chBest->ch_Addr6) == 0)) || - chBest->ch_Service == NULL || - strcmp(sep->se_service, chBest->ch_Service) != 0) { - chBest->ch_Family = sin6->sin6_family; - chBest->ch_Addr6 = sin6->sin6_addr; - if (chBest->ch_Service) - free(chBest->ch_Service); - chBest->ch_Service = strdup(sep->se_service); - bzero(chBest->ch_Times, sizeof(chBest->ch_Times)); - } -#endif - chBest->ch_LTime = t; - { - CTime *ct = &chBest->ch_Times[ticks % CHTSIZE]; - if (ct->ct_Ticks != ticks) { - ct->ct_Ticks = ticks; - ct->ct_Count = 0; - } - ++ct->ct_Count; - } - for (i = 0; i < CHTSIZE; ++i) { - CTime *ct = &chBest->ch_Times[i]; - if (ct->ct_Ticks <= ticks && - ct->ct_Ticks >= ticks - CHTSIZE) { - cnt += ct->ct_Count; - } - } - if ((cnt * 60) / (CHTSIZE * CHTGRAN) > sep->se_maxcpm) { - char pname[INET6_ADDRSTRLEN]; - - getnameinfo((struct sockaddr *)&rss, - ((struct sockaddr *)&rss)->sa_len, - pname, sizeof(pname), NULL, 0, - NI_NUMERICHOST); - r = -1; - syslog(LOG_ERR, - "%s from %s exceeded counts/min (limit %d/min)", - sep->se_service, pname, - sep->se_maxcpm); - } - } - return(r); -} - -static struct conninfo * -search_conn(struct servtab *sep, int ctrl) -{ - struct sockaddr_storage ss; - socklen_t sslen = sizeof(ss); - struct conninfo *conn; - int hv; - char pname[NI_MAXHOST], pname2[NI_MAXHOST]; - - if (sep->se_maxperip <= 0) - return NULL; - - /* - * If getpeername() fails, just let it through (if logging is - * enabled the condition is caught elsewhere) - */ - if (getpeername(ctrl, (struct sockaddr *)&ss, &sslen) != 0) - return NULL; - - switch (ss.ss_family) { - case AF_INET: - hv = hashval((char *)&((struct sockaddr_in *)&ss)->sin_addr, - sizeof(struct in_addr)); - break; -#ifdef INET6 - case AF_INET6: - hv = hashval((char *)&((struct sockaddr_in6 *)&ss)->sin6_addr, - sizeof(struct in6_addr)); - break; -#endif - default: - /* - * Since we only support AF_INET and AF_INET6, just - * let other than AF_INET and AF_INET6 through. - */ - return NULL; - } - - if (getnameinfo((struct sockaddr *)&ss, sslen, pname, sizeof(pname), - NULL, 0, NI_NUMERICHOST) != 0) - return NULL; - - LIST_FOREACH(conn, &sep->se_conn[hv], co_link) { - if (getnameinfo((struct sockaddr *)&conn->co_addr, - conn->co_addr.ss_len, pname2, sizeof(pname2), NULL, 0, - NI_NUMERICHOST) == 0 && - strcmp(pname, pname2) == 0) - break; - } - - if (conn == NULL) { - if ((conn = malloc(sizeof(struct conninfo))) == NULL) { - syslog(LOG_ERR, "malloc: %m"); - exit(EX_OSERR); - } - conn->co_proc = malloc(sep->se_maxperip * sizeof(*conn->co_proc)); - if (conn->co_proc == NULL) { - syslog(LOG_ERR, "malloc: %m"); - exit(EX_OSERR); - } - memcpy(&conn->co_addr, (struct sockaddr *)&ss, sslen); - conn->co_numchild = 0; - LIST_INSERT_HEAD(&sep->se_conn[hv], conn, co_link); - } - - /* - * Since a child process is not invoked yet, we cannot - * determine a pid of a child. So, co_proc and co_numchild - * should be filled leter. - */ - - return conn; -} - -static int -room_conn(struct servtab *sep, struct conninfo *conn) -{ - char pname[NI_MAXHOST]; - - if (conn->co_numchild >= sep->se_maxperip) { - getnameinfo((struct sockaddr *)&conn->co_addr, - conn->co_addr.ss_len, pname, sizeof(pname), NULL, 0, - NI_NUMERICHOST); - syslog(LOG_ERR, "%s from %s exceeded counts (limit %d)", - sep->se_service, pname, sep->se_maxperip); - return 0; - } - return 1; -} - -static void -addchild_conn(struct conninfo *conn, pid_t pid) -{ - struct procinfo *proc; - - if (conn == NULL) - return; - - if ((proc = search_proc(pid, 1)) != NULL) { - if (proc->pr_conn != NULL) { - syslog(LOG_ERR, - "addchild_conn: child already on process list"); - exit(EX_OSERR); - } - proc->pr_conn = conn; - } - - conn->co_proc[conn->co_numchild++] = proc; -} - -static void -reapchild_conn(pid_t pid) -{ - struct procinfo *proc; - struct conninfo *conn; - int i; - - if ((proc = search_proc(pid, 0)) == NULL) - return; - if ((conn = proc->pr_conn) == NULL) - return; - for (i = 0; i < conn->co_numchild; ++i) - if (conn->co_proc[i] == proc) { - conn->co_proc[i] = conn->co_proc[--conn->co_numchild]; - break; - } - free_proc(proc); - free_conn(conn); -} - -static void -resize_conn(struct servtab *sep, int maxpip) -{ - struct conninfo *conn; - int i, j; - - if (sep->se_maxperip <= 0) - return; - if (maxpip <= 0) { - free_connlist(sep); - return; - } - for (i = 0; i < PERIPSIZE; ++i) { - LIST_FOREACH(conn, &sep->se_conn[i], co_link) { - for (j = maxpip; j < conn->co_numchild; ++j) - free_proc(conn->co_proc[j]); - conn->co_proc = realloc(conn->co_proc, - maxpip * sizeof(*conn->co_proc)); - if (conn->co_proc == NULL) { - syslog(LOG_ERR, "realloc: %m"); - exit(EX_OSERR); - } - if (conn->co_numchild > maxpip) - conn->co_numchild = maxpip; - } - } -} - -static void -free_connlist(struct servtab *sep) -{ - struct conninfo *conn; - int i, j; - - for (i = 0; i < PERIPSIZE; ++i) { - while ((conn = LIST_FIRST(&sep->se_conn[i])) != NULL) { - for (j = 0; j < conn->co_numchild; ++j) - free_proc(conn->co_proc[j]); - conn->co_numchild = 0; - free_conn(conn); - } - } -} - -static void -free_conn(struct conninfo *conn) -{ - if (conn == NULL) - return; - if (conn->co_numchild <= 0) { - LIST_REMOVE(conn, co_link); - free(conn->co_proc); - free(conn); - } -} - -static struct procinfo * -search_proc(pid_t pid, int add) -{ - struct procinfo *proc; - int hv; - - hv = hashval((char *)&pid, sizeof(pid)); - LIST_FOREACH(proc, &proctable[hv], pr_link) { - if (proc->pr_pid == pid) - break; - } - if (proc == NULL && add) { - if ((proc = malloc(sizeof(struct procinfo))) == NULL) { - syslog(LOG_ERR, "malloc: %m"); - exit(EX_OSERR); - } - proc->pr_pid = pid; - proc->pr_conn = NULL; - LIST_INSERT_HEAD(&proctable[hv], proc, pr_link); - } - return proc; -} - -static void -free_proc(struct procinfo *proc) -{ - if (proc == NULL) - return; - LIST_REMOVE(proc, pr_link); - free(proc); -} - -static int -hashval(char *p, int len) -{ - int i, hv = 0xABC3D20F; - - for (i = 0; i < len; ++i, ++p) - hv = (hv << 5) ^ (hv >> 23) ^ *p; - hv = (hv ^ (hv >> 16)) & (PERIPSIZE - 1); - return hv; -} |