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-rw-r--r--usr.sbin/rpc.statd/statd.c655
1 files changed, 655 insertions, 0 deletions
diff --git a/usr.sbin/rpc.statd/statd.c b/usr.sbin/rpc.statd/statd.c
new file mode 100644
index 0000000..256f58d
--- /dev/null
+++ b/usr.sbin/rpc.statd/statd.c
@@ -0,0 +1,655 @@
+/*
+ * Copyright (c) 1995
+ * A.R. Gordon (andrew.gordon@net-tel.co.uk). 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.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed for the FreeBSD project
+ * 4. Neither the name of the author nor the names of any co-contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY ANDREW GORDON 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 AUTHOR 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.
+ *
+ */
+
+/* main() function for status monitor daemon. Some of the code in this */
+/* file was generated by running rpcgen /usr/include/rpcsvc/sm_inter.x */
+/* The actual program logic is in the file procs.c */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <err.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <rpc/rpc.h>
+#include <rpc/rpc_com.h>
+#include <string.h>
+#include <syslog.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/wait.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <signal.h>
+#include <unistd.h>
+#include "statd.h"
+
+#define GETPORT_MAXTRY 20 /* Max tries to get a port # */
+
+int debug = 0; /* Controls syslog() calls for debug messages */
+
+char **hosts, *svcport_str = NULL;
+int nhosts = 0;
+int xcreated = 0;
+static int mallocd_svcport = 0;
+static int *sock_fd;
+static int sock_fdcnt;
+static int sock_fdpos;
+
+static int create_service(struct netconfig *nconf);
+static void complete_service(struct netconfig *nconf, char *port_str);
+static void clearout_service(void);
+static void handle_sigchld(int sig);
+void out_of_mem(void);
+
+static void usage(void);
+
+int
+main(int argc, char **argv)
+{
+ struct sigaction sa;
+ struct netconfig *nconf;
+ void *nc_handle;
+ in_port_t svcport;
+ int ch, i, s;
+ char *endptr, **hosts_bak;
+ int have_v6 = 1;
+ int maxrec = RPC_MAXDATASIZE;
+ int attempt_cnt, port_len, port_pos, ret;
+ char **port_list;
+
+ while ((ch = getopt(argc, argv, "dh:p:")) != -1)
+ switch (ch) {
+ case 'd':
+ debug = 1;
+ break;
+ case 'h':
+ ++nhosts;
+ hosts_bak = hosts;
+ hosts_bak = realloc(hosts, nhosts * sizeof(char *));
+ if (hosts_bak == NULL) {
+ if (hosts != NULL) {
+ for (i = 0; i < nhosts; i++)
+ free(hosts[i]);
+ free(hosts);
+ out_of_mem();
+ }
+ }
+ hosts = hosts_bak;
+ hosts[nhosts - 1] = strdup(optarg);
+ if (hosts[nhosts - 1] == NULL) {
+ for (i = 0; i < (nhosts - 1); i++)
+ free(hosts[i]);
+ free(hosts);
+ out_of_mem();
+ }
+ break;
+ case 'p':
+ endptr = NULL;
+ svcport = (in_port_t)strtoul(optarg, &endptr, 10);
+ if (endptr == NULL || *endptr != '\0' || svcport == 0 ||
+ svcport >= IPPORT_MAX)
+ usage();
+
+ svcport_str = strdup(optarg);
+ break;
+ default:
+ usage();
+ }
+ argc -= optind;
+ argv += optind;
+
+ (void)rpcb_unset(SM_PROG, SM_VERS, NULL);
+
+ /*
+ * Check if IPv6 support is present.
+ */
+ s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
+ if (s < 0)
+ have_v6 = 0;
+ else
+ close(s);
+
+ rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec);
+
+ /*
+ * If no hosts were specified, add a wildcard entry to bind to
+ * INADDR_ANY. Otherwise make sure 127.0.0.1 and ::1 are added to the
+ * list.
+ */
+ if (nhosts == 0) {
+ hosts = malloc(sizeof(char *));
+ if (hosts == NULL)
+ out_of_mem();
+
+ hosts[0] = "*";
+ nhosts = 1;
+ } else {
+ hosts_bak = hosts;
+ if (have_v6) {
+ hosts_bak = realloc(hosts, (nhosts + 2) *
+ sizeof(char *));
+ if (hosts_bak == NULL) {
+ for (i = 0; i < nhosts; i++)
+ free(hosts[i]);
+ free(hosts);
+ out_of_mem();
+ } else
+ hosts = hosts_bak;
+
+ nhosts += 2;
+ hosts[nhosts - 2] = "::1";
+ } else {
+ hosts_bak = realloc(hosts, (nhosts + 1) * sizeof(char *));
+ if (hosts_bak == NULL) {
+ for (i = 0; i < nhosts; i++)
+ free(hosts[i]);
+
+ free(hosts);
+ out_of_mem();
+ } else {
+ nhosts += 1;
+ hosts = hosts_bak;
+ }
+ }
+ hosts[nhosts - 1] = "127.0.0.1";
+ }
+
+ attempt_cnt = 1;
+ sock_fdcnt = 0;
+ sock_fd = NULL;
+ port_list = NULL;
+ port_len = 0;
+ nc_handle = setnetconfig();
+ while ((nconf = getnetconfig(nc_handle))) {
+ /* We want to listen only on udp6, tcp6, udp, tcp transports */
+ if (nconf->nc_flag & NC_VISIBLE) {
+ /* Skip if there's no IPv6 support */
+ if (have_v6 == 0 && strcmp(nconf->nc_protofmly, "inet6") == 0) {
+ /* DO NOTHING */
+ } else {
+ ret = create_service(nconf);
+ if (ret == 1)
+ /* Ignore this call */
+ continue;
+ if (ret < 0) {
+ /*
+ * Failed to bind port, so close off
+ * all sockets created and try again
+ * if the port# was dynamically
+ * assigned via bind(2).
+ */
+ clearout_service();
+ if (mallocd_svcport != 0 &&
+ attempt_cnt < GETPORT_MAXTRY) {
+ free(svcport_str);
+ svcport_str = NULL;
+ mallocd_svcport = 0;
+ } else {
+ errno = EADDRINUSE;
+ syslog(LOG_ERR,
+ "bindresvport_sa: %m");
+ exit(1);
+ }
+
+ /* Start over at the first service. */
+ free(sock_fd);
+ sock_fdcnt = 0;
+ sock_fd = NULL;
+ nc_handle = setnetconfig();
+ attempt_cnt++;
+ } else if (mallocd_svcport != 0 &&
+ attempt_cnt == GETPORT_MAXTRY) {
+ /*
+ * For the last attempt, allow
+ * different port #s for each nconf
+ * by saving the svcport_str and
+ * setting it back to NULL.
+ */
+ port_list = realloc(port_list,
+ (port_len + 1) * sizeof(char *));
+ if (port_list == NULL)
+ out_of_mem();
+ port_list[port_len++] = svcport_str;
+ svcport_str = NULL;
+ mallocd_svcport = 0;
+ }
+ }
+ }
+ }
+
+ /*
+ * Successfully bound the ports, so call complete_service() to
+ * do the rest of the setup on the service(s).
+ */
+ sock_fdpos = 0;
+ port_pos = 0;
+ nc_handle = setnetconfig();
+ while ((nconf = getnetconfig(nc_handle))) {
+ /* We want to listen only on udp6, tcp6, udp, tcp transports */
+ if (nconf->nc_flag & NC_VISIBLE) {
+ /* Skip if there's no IPv6 support */
+ if (have_v6 == 0 && strcmp(nconf->nc_protofmly, "inet6") == 0) {
+ /* DO NOTHING */
+ } else if (port_list != NULL) {
+ if (port_pos >= port_len) {
+ syslog(LOG_ERR, "too many port#s");
+ exit(1);
+ }
+ complete_service(nconf, port_list[port_pos++]);
+ } else
+ complete_service(nconf, svcport_str);
+ }
+ }
+ endnetconfig(nc_handle);
+ free(sock_fd);
+ if (port_list != NULL) {
+ for (port_pos = 0; port_pos < port_len; port_pos++)
+ free(port_list[port_pos]);
+ free(port_list);
+ }
+
+ init_file("/var/db/statd.status");
+
+ /* Note that it is NOT sensible to run this program from inetd - the */
+ /* protocol assumes that it will run immediately at boot time. */
+ daemon(0, 0);
+ openlog("rpc.statd", 0, LOG_DAEMON);
+ if (debug) syslog(LOG_INFO, "Starting - debug enabled");
+ else syslog(LOG_INFO, "Starting");
+
+ /* Install signal handler to collect exit status of child processes */
+ sa.sa_handler = handle_sigchld;
+ sigemptyset(&sa.sa_mask);
+ sigaddset(&sa.sa_mask, SIGCHLD);
+ sa.sa_flags = SA_RESTART;
+ sigaction(SIGCHLD, &sa, NULL);
+
+ /* Initialisation now complete - start operating */
+ notify_hosts(); /* Forks a process (if necessary) to do the */
+ /* SM_NOTIFY calls, which may be slow. */
+
+ svc_run(); /* Should never return */
+ exit(1);
+}
+
+/*
+ * This routine creates and binds sockets on the appropriate
+ * addresses. It gets called one time for each transport.
+ * It returns 0 upon success, 1 for ingore the call and -1 to indicate
+ * bind failed with EADDRINUSE.
+ * Any file descriptors that have been created are stored in sock_fd and
+ * the total count of them is maintained in sock_fdcnt.
+ */
+static int
+create_service(struct netconfig *nconf)
+{
+ struct addrinfo hints, *res = NULL;
+ struct sockaddr_in *sin;
+ struct sockaddr_in6 *sin6;
+ struct __rpc_sockinfo si;
+ int aicode;
+ int fd;
+ int nhostsbak;
+ int r;
+ u_int32_t host_addr[4]; /* IPv4 or IPv6 */
+ int mallocd_res;
+
+ if ((nconf->nc_semantics != NC_TPI_CLTS) &&
+ (nconf->nc_semantics != NC_TPI_COTS) &&
+ (nconf->nc_semantics != NC_TPI_COTS_ORD))
+ return (1); /* not my type */
+
+ /*
+ * XXX - using RPC library internal functions.
+ */
+ if (!__rpc_nconf2sockinfo(nconf, &si)) {
+ syslog(LOG_ERR, "cannot get information for %s",
+ nconf->nc_netid);
+ return (1);
+ }
+
+ /* Get rpc.statd's address on this transport */
+ memset(&hints, 0, sizeof hints);
+ hints.ai_family = si.si_af;
+ hints.ai_socktype = si.si_socktype;
+ hints.ai_protocol = si.si_proto;
+
+ /*
+ * Bind to specific IPs if asked to
+ */
+ nhostsbak = nhosts;
+ while (nhostsbak > 0) {
+ --nhostsbak;
+ sock_fd = realloc(sock_fd, (sock_fdcnt + 1) * sizeof(int));
+ if (sock_fd == NULL)
+ out_of_mem();
+ sock_fd[sock_fdcnt++] = -1; /* Set invalid for now. */
+ mallocd_res = 0;
+ hints.ai_flags = AI_PASSIVE;
+
+ /*
+ * XXX - using RPC library internal functions.
+ */
+ if ((fd = __rpc_nconf2fd(nconf)) < 0) {
+ syslog(LOG_ERR, "cannot create socket for %s",
+ nconf->nc_netid);
+ continue;
+ }
+ switch (hints.ai_family) {
+ case AF_INET:
+ if (inet_pton(AF_INET, hosts[nhostsbak],
+ host_addr) == 1) {
+ hints.ai_flags |= AI_NUMERICHOST;
+ } else {
+ /*
+ * Skip if we have an AF_INET6 address.
+ */
+ if (inet_pton(AF_INET6, hosts[nhostsbak],
+ host_addr) == 1) {
+ close(fd);
+ continue;
+ }
+ }
+ break;
+ case AF_INET6:
+ if (inet_pton(AF_INET6, hosts[nhostsbak],
+ host_addr) == 1) {
+ hints.ai_flags |= AI_NUMERICHOST;
+ } else {
+ /*
+ * Skip if we have an AF_INET address.
+ */
+ if (inet_pton(AF_INET, hosts[nhostsbak],
+ host_addr) == 1) {
+ close(fd);
+ continue;
+ }
+ }
+ break;
+ default:
+ break;
+ }
+
+ /*
+ * If no hosts were specified, just bind to INADDR_ANY
+ */
+ if (strcmp("*", hosts[nhostsbak]) == 0) {
+ if (svcport_str == NULL) {
+ res = malloc(sizeof(struct addrinfo));
+ if (res == NULL)
+ out_of_mem();
+ mallocd_res = 1;
+ res->ai_flags = hints.ai_flags;
+ res->ai_family = hints.ai_family;
+ res->ai_protocol = hints.ai_protocol;
+ switch (res->ai_family) {
+ case AF_INET:
+ sin = malloc(sizeof(struct sockaddr_in));
+ if (sin == NULL)
+ out_of_mem();
+ sin->sin_family = AF_INET;
+ sin->sin_port = htons(0);
+ sin->sin_addr.s_addr = htonl(INADDR_ANY);
+ res->ai_addr = (struct sockaddr*) sin;
+ res->ai_addrlen = (socklen_t)
+ sizeof(struct sockaddr_in);
+ break;
+ case AF_INET6:
+ sin6 = malloc(sizeof(struct sockaddr_in6));
+ if (sin6 == NULL)
+ out_of_mem();
+ sin6->sin6_family = AF_INET6;
+ sin6->sin6_port = htons(0);
+ sin6->sin6_addr = in6addr_any;
+ res->ai_addr = (struct sockaddr*) sin6;
+ res->ai_addrlen = (socklen_t)
+ sizeof(struct sockaddr_in6);
+ break;
+ default:
+ syslog(LOG_ERR, "bad addr fam %d",
+ res->ai_family);
+ exit(1);
+ }
+ } else {
+ if ((aicode = getaddrinfo(NULL, svcport_str,
+ &hints, &res)) != 0) {
+ syslog(LOG_ERR,
+ "cannot get local address for %s: %s",
+ nconf->nc_netid,
+ gai_strerror(aicode));
+ close(fd);
+ continue;
+ }
+ }
+ } else {
+ if ((aicode = getaddrinfo(hosts[nhostsbak], svcport_str,
+ &hints, &res)) != 0) {
+ syslog(LOG_ERR,
+ "cannot get local address for %s: %s",
+ nconf->nc_netid, gai_strerror(aicode));
+ close(fd);
+ continue;
+ }
+ }
+
+ /* Store the fd. */
+ sock_fd[sock_fdcnt - 1] = fd;
+
+ /* Now, attempt the bind. */
+ r = bindresvport_sa(fd, res->ai_addr);
+ if (r != 0) {
+ if (errno == EADDRINUSE && mallocd_svcport != 0) {
+ if (mallocd_res != 0) {
+ free(res->ai_addr);
+ free(res);
+ } else
+ freeaddrinfo(res);
+ return (-1);
+ }
+ syslog(LOG_ERR, "bindresvport_sa: %m");
+ exit(1);
+ }
+
+ if (svcport_str == NULL) {
+ svcport_str = malloc(NI_MAXSERV * sizeof(char));
+ if (svcport_str == NULL)
+ out_of_mem();
+ mallocd_svcport = 1;
+
+ if (getnameinfo(res->ai_addr,
+ res->ai_addr->sa_len, NULL, NI_MAXHOST,
+ svcport_str, NI_MAXSERV * sizeof(char),
+ NI_NUMERICHOST | NI_NUMERICSERV))
+ errx(1, "Cannot get port number");
+ }
+ if (mallocd_res != 0) {
+ free(res->ai_addr);
+ free(res);
+ } else
+ freeaddrinfo(res);
+ res = NULL;
+ }
+ return (0);
+}
+
+/*
+ * Called after all the create_service() calls have succeeded, to complete
+ * the setup and registration.
+ */
+static void
+complete_service(struct netconfig *nconf, char *port_str)
+{
+ struct addrinfo hints, *res = NULL;
+ struct __rpc_sockinfo si;
+ struct netbuf servaddr;
+ SVCXPRT *transp = NULL;
+ int aicode, fd, nhostsbak;
+ int registered = 0;
+
+ if ((nconf->nc_semantics != NC_TPI_CLTS) &&
+ (nconf->nc_semantics != NC_TPI_COTS) &&
+ (nconf->nc_semantics != NC_TPI_COTS_ORD))
+ return; /* not my type */
+
+ /*
+ * XXX - using RPC library internal functions.
+ */
+ if (!__rpc_nconf2sockinfo(nconf, &si)) {
+ syslog(LOG_ERR, "cannot get information for %s",
+ nconf->nc_netid);
+ return;
+ }
+
+ nhostsbak = nhosts;
+ while (nhostsbak > 0) {
+ --nhostsbak;
+ if (sock_fdpos >= sock_fdcnt) {
+ /* Should never happen. */
+ syslog(LOG_ERR, "Ran out of socket fd's");
+ return;
+ }
+ fd = sock_fd[sock_fdpos++];
+ if (fd < 0)
+ continue;
+
+ if (nconf->nc_semantics != NC_TPI_CLTS)
+ listen(fd, SOMAXCONN);
+
+ transp = svc_tli_create(fd, nconf, NULL,
+ RPC_MAXDATASIZE, RPC_MAXDATASIZE);
+
+ if (transp != (SVCXPRT *) NULL) {
+ if (!svc_register(transp, SM_PROG, SM_VERS,
+ sm_prog_1, 0)) {
+ syslog(LOG_ERR, "can't register on %s",
+ nconf->nc_netid);
+ } else {
+ if (!svc_reg(transp, SM_PROG, SM_VERS,
+ sm_prog_1, NULL))
+ syslog(LOG_ERR,
+ "can't register %s SM_PROG service",
+ nconf->nc_netid);
+ }
+ } else
+ syslog(LOG_WARNING, "can't create %s services",
+ nconf->nc_netid);
+
+ if (registered == 0) {
+ registered = 1;
+ memset(&hints, 0, sizeof hints);
+ hints.ai_flags = AI_PASSIVE;
+ hints.ai_family = si.si_af;
+ hints.ai_socktype = si.si_socktype;
+ hints.ai_protocol = si.si_proto;
+
+
+ if ((aicode = getaddrinfo(NULL, port_str, &hints,
+ &res)) != 0) {
+ syslog(LOG_ERR, "cannot get local address: %s",
+ gai_strerror(aicode));
+ exit(1);
+ }
+
+ servaddr.buf = malloc(res->ai_addrlen);
+ memcpy(servaddr.buf, res->ai_addr, res->ai_addrlen);
+ servaddr.len = res->ai_addrlen;
+
+ rpcb_set(SM_PROG, SM_VERS, nconf, &servaddr);
+
+ xcreated++;
+ freeaddrinfo(res);
+ }
+ } /* end while */
+}
+
+/*
+ * Clear out sockets after a failure to bind one of them, so that the
+ * cycle of socket creation/binding can start anew.
+ */
+static void
+clearout_service(void)
+{
+ int i;
+
+ for (i = 0; i < sock_fdcnt; i++) {
+ if (sock_fd[i] >= 0) {
+ shutdown(sock_fd[i], SHUT_RDWR);
+ close(sock_fd[i]);
+ }
+ }
+}
+
+static void
+usage()
+{
+ fprintf(stderr, "usage: rpc.statd [-d] [-h <bindip>] [-p <port>]\n");
+ exit(1);
+}
+
+/* handle_sigchld ---------------------------------------------------------- */
+/*
+ Purpose: Catch SIGCHLD and collect process status
+ Retruns: Nothing.
+ Notes: No special action required, other than to collect the
+ process status and hence allow the child to die:
+ we only use child processes for asynchronous transmission
+ of SM_NOTIFY to other systems, so it is normal for the
+ children to exit when they have done their work.
+*/
+
+static void handle_sigchld(int sig __unused)
+{
+ int pid, status;
+ pid = wait4(-1, &status, WNOHANG, (struct rusage*)0);
+ if (!pid) syslog(LOG_ERR, "Phantom SIGCHLD??");
+ else if (status == 0)
+ {
+ if (debug) syslog(LOG_DEBUG, "Child %d exited OK", pid);
+ }
+ else syslog(LOG_ERR, "Child %d failed with status %d", pid,
+ WEXITSTATUS(status));
+}
+
+/*
+ * Out of memory, fatal
+ */
+void
+out_of_mem()
+{
+
+ syslog(LOG_ERR, "out of memory");
+ exit(2);
+}
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