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Diffstat (limited to 'usr.sbin/rpcbind/rpcb_svc_com.c')
-rw-r--r--usr.sbin/rpcbind/rpcb_svc_com.c1489
1 files changed, 1489 insertions, 0 deletions
diff --git a/usr.sbin/rpcbind/rpcb_svc_com.c b/usr.sbin/rpcbind/rpcb_svc_com.c
new file mode 100644
index 000000000000..a82cf44bfa3c
--- /dev/null
+++ b/usr.sbin/rpcbind/rpcb_svc_com.c
@@ -0,0 +1,1489 @@
+/* $NetBSD: rpcb_svc_com.c,v 1.9 2002/11/08 00:16:39 fvdl Exp $ */
+
+/*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * Copyright (c) 2009, Sun Microsystems, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * - 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.
+ * - Neither the name of Sun Microsystems, Inc. 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 COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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.
+ */
+/*
+ * Copyright (c) 1986 - 1991 by Sun Microsystems, Inc.
+ */
+
+/*
+ * rpcb_svc_com.c
+ * The commom server procedure for the rpcbind.
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/param.h>
+#include <sys/poll.h>
+#include <sys/socket.h>
+#include <rpc/rpc.h>
+#include <rpc/rpcb_prot.h>
+#include <rpc/svc_dg.h>
+#include <assert.h>
+#include <netconfig.h>
+#include <errno.h>
+#include <syslog.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#ifdef PORTMAP
+#include <netinet/in.h>
+#include <rpc/rpc_com.h>
+#include <rpc/pmap_prot.h>
+#endif /* PORTMAP */
+
+#include "rpcbind.h"
+
+#define RPC_BUF_MAX 65536 /* can be raised if required */
+
+static char *nullstring = "";
+static int rpcb_rmtcalls;
+
+struct rmtcallfd_list {
+ int fd;
+ SVCXPRT *xprt;
+ char *netid;
+ struct rmtcallfd_list *next;
+};
+
+#define NFORWARD 64
+#define MAXTIME_OFF 300 /* 5 minutes */
+
+struct finfo {
+ int flag;
+#define FINFO_ACTIVE 0x1
+ u_int32_t caller_xid;
+ struct netbuf *caller_addr;
+ u_int32_t forward_xid;
+ int forward_fd;
+ char *uaddr;
+ rpcproc_t reply_type;
+ rpcvers_t versnum;
+ time_t time;
+};
+static struct finfo FINFO[NFORWARD];
+
+
+static bool_t xdr_encap_parms(XDR *, struct encap_parms *);
+static bool_t xdr_rmtcall_args(XDR *, struct r_rmtcall_args *);
+static bool_t xdr_rmtcall_result(XDR *, struct r_rmtcall_args *);
+static bool_t xdr_opaque_parms(XDR *, struct r_rmtcall_args *);
+static int find_rmtcallfd_by_netid(char *);
+static SVCXPRT *find_rmtcallxprt_by_fd(int);
+static int forward_register(u_int32_t, struct netbuf *, int, char *,
+ rpcproc_t, rpcvers_t, u_int32_t *);
+static struct finfo *forward_find(u_int32_t);
+static int free_slot_by_xid(u_int32_t);
+static int free_slot_by_index(int);
+static int netbufcmp(struct netbuf *, struct netbuf *);
+static struct netbuf *netbufdup(struct netbuf *);
+static void netbuffree(struct netbuf *);
+static int check_rmtcalls(struct pollfd *, int);
+static void xprt_set_caller(SVCXPRT *, struct finfo *);
+static void send_svcsyserr(SVCXPRT *, struct finfo *);
+static void handle_reply(int, SVCXPRT *);
+static void find_versions(rpcprog_t, const char *, rpcvers_t *, rpcvers_t *);
+static rpcblist_ptr find_service(rpcprog_t, rpcvers_t, char *);
+static char *getowner(SVCXPRT *, char *, size_t);
+static int add_pmaplist(RPCB *);
+static int del_pmaplist(RPCB *);
+
+/*
+ * Set a mapping of program, version, netid
+ */
+/* ARGSUSED */
+void *
+rpcbproc_set_com(void *arg, struct svc_req *rqstp __unused, SVCXPRT *transp,
+ rpcvers_t rpcbversnum)
+{
+ RPCB *regp = arg;
+ static bool_t ans;
+ char owner[64];
+
+#ifdef RPCBIND_DEBUG
+ if (debugging)
+ fprintf(stderr, "%s: RPCB_SET request for (%lu, %lu, %s, %s): ",
+ __func__, (unsigned long)regp->r_prog,
+ (unsigned long)regp->r_vers, regp->r_netid, regp->r_addr);
+#endif
+ ans = map_set(regp, getowner(transp, owner, sizeof owner));
+#ifdef RPCBIND_DEBUG
+ if (debugging)
+ fprintf(stderr, "%s\n", ans == TRUE ? "succeeded" : "failed");
+#endif
+ /* XXX: should have used some defined constant here */
+ rpcbs_set(rpcbversnum - 2, ans);
+ return (void *)&ans;
+}
+
+bool_t
+map_set(RPCB *regp, const char *owner)
+{
+ RPCB reg, *a;
+ rpcblist_ptr rbl, fnd;
+
+ reg = *regp;
+ /*
+ * check to see if already used
+ * find_service returns a hit even if
+ * the versions don't match, so check for it
+ */
+ fnd = find_service(reg.r_prog, reg.r_vers, reg.r_netid);
+ if (fnd && (fnd->rpcb_map.r_vers == reg.r_vers)) {
+ if (!strcmp(fnd->rpcb_map.r_addr, reg.r_addr))
+ /*
+ * if these match then it is already
+ * registered so just say "OK".
+ */
+ return (TRUE);
+ else
+ return (FALSE);
+ }
+ /*
+ * add to the end of the list
+ */
+ rbl = malloc(sizeof(*rbl));
+ if (rbl == NULL)
+ return (FALSE);
+ a = &(rbl->rpcb_map);
+ a->r_prog = reg.r_prog;
+ a->r_vers = reg.r_vers;
+ a->r_netid = strdup(reg.r_netid);
+ a->r_addr = strdup(reg.r_addr);
+ a->r_owner = strdup(owner);
+ if (!a->r_addr || !a->r_netid || !a->r_owner) {
+ free(a->r_netid);
+ free(a->r_addr);
+ free(a->r_owner);
+ free(rbl);
+ return (FALSE);
+ }
+ rbl->rpcb_next = NULL;
+ if (list_rbl == NULL) {
+ list_rbl = rbl;
+ } else {
+ for (fnd = list_rbl; fnd->rpcb_next;
+ fnd = fnd->rpcb_next)
+ ;
+ fnd->rpcb_next = rbl;
+ }
+#ifdef PORTMAP
+ (void)add_pmaplist(regp);
+#endif
+ return (TRUE);
+}
+
+/*
+ * Unset a mapping of program, version, netid
+ */
+/* ARGSUSED */
+void *
+rpcbproc_unset_com(void *arg, struct svc_req *rqstp __unused, SVCXPRT *transp,
+ rpcvers_t rpcbversnum)
+{
+ RPCB *regp = arg;
+ static bool_t ans;
+ char owner[64];
+
+#ifdef RPCBIND_DEBUG
+ if (debugging)
+ fprintf(stderr, "%s: RPCB_UNSET request for (%lu, %lu, %s): ",
+ __func__, (unsigned long)regp->r_prog,
+ (unsigned long)regp->r_vers, regp->r_netid);
+#endif
+ ans = map_unset(regp, getowner(transp, owner, sizeof owner));
+#ifdef RPCBIND_DEBUG
+ if (debugging)
+ fprintf(stderr, "%s\n", ans == TRUE ? "succeeded" : "failed");
+#endif
+ /* XXX: should have used some defined constant here */
+ rpcbs_unset(rpcbversnum - 2, ans);
+ return (void *)&ans;
+}
+
+bool_t
+map_unset(RPCB *regp, const char *owner)
+{
+ int ans = 0;
+ rpcblist_ptr rbl, prev, tmp;
+
+ if (owner == NULL)
+ return (0);
+
+ for (prev = NULL, rbl = list_rbl; rbl; /* cstyle */) {
+ if ((rbl->rpcb_map.r_prog != regp->r_prog) ||
+ (rbl->rpcb_map.r_vers != regp->r_vers) ||
+ (regp->r_netid[0] && strcasecmp(regp->r_netid,
+ rbl->rpcb_map.r_netid))) {
+ /* both rbl & prev move forwards */
+ prev = rbl;
+ rbl = rbl->rpcb_next;
+ continue;
+ }
+ /*
+ * Check whether appropriate uid. Unset only
+ * if superuser or the owner itself.
+ */
+ if (strcmp(owner, rpcbind_superuser) &&
+ strcmp(rbl->rpcb_map.r_owner, owner))
+ return (0);
+ /* found it; rbl moves forward, prev stays */
+ ans = 1;
+ tmp = rbl;
+ rbl = rbl->rpcb_next;
+ if (prev == NULL)
+ list_rbl = rbl;
+ else
+ prev->rpcb_next = rbl;
+ free(tmp->rpcb_map.r_addr);
+ free(tmp->rpcb_map.r_netid);
+ free(tmp->rpcb_map.r_owner);
+ free(tmp);
+ }
+#ifdef PORTMAP
+ if (ans)
+ (void)del_pmaplist(regp);
+#endif
+ /*
+ * We return 1 either when the entry was not there or it
+ * was able to unset it. It can come to this point only if
+ * at least one of the conditions is true.
+ */
+ return (1);
+}
+
+void
+delete_prog(rpcprog_t prog)
+{
+ RPCB reg;
+ rpcblist_ptr rbl;
+
+ for (rbl = list_rbl; rbl != NULL; rbl = rbl->rpcb_next) {
+ if ((rbl->rpcb_map.r_prog != prog))
+ continue;
+ if (is_bound(rbl->rpcb_map.r_netid, rbl->rpcb_map.r_addr))
+ continue;
+ reg.r_prog = rbl->rpcb_map.r_prog;
+ reg.r_vers = rbl->rpcb_map.r_vers;
+ reg.r_netid = strdup(rbl->rpcb_map.r_netid);
+ if (reg.r_netid == NULL)
+ syslog(LOG_ERR, "%s: %m", __func__);
+ else {
+ (void)map_unset(&reg, rpcbind_superuser);
+ free(reg.r_netid);
+ }
+ }
+}
+
+void *
+rpcbproc_getaddr_com(RPCB *regp, struct svc_req *rqstp __unused,
+ SVCXPRT *transp, rpcvers_t rpcbversnum, rpcvers_t verstype)
+{
+ static char *uaddr;
+ char *saddr = NULL;
+ rpcblist_ptr fnd;
+
+ if (uaddr != NULL && uaddr != nullstring) {
+ free(uaddr);
+ uaddr = NULL;
+ }
+ fnd = find_service(regp->r_prog, regp->r_vers, transp->xp_netid);
+ if (fnd && ((verstype == RPCB_ALLVERS) ||
+ (regp->r_vers == fnd->rpcb_map.r_vers))) {
+ if (*(regp->r_addr) != '\0') { /* may contain a hint about */
+ saddr = regp->r_addr; /* the interface that we */
+ } /* should use */
+ if (!(uaddr = mergeaddr(transp, transp->xp_netid,
+ fnd->rpcb_map.r_addr, saddr))) {
+ /* Try whatever we have */
+ uaddr = strdup(fnd->rpcb_map.r_addr);
+ } else if (!uaddr[0]) {
+ /*
+ * The server died. Unset all versions of this prog.
+ */
+ delete_prog(regp->r_prog);
+ uaddr = nullstring;
+ }
+ } else {
+ uaddr = nullstring;
+ }
+#ifdef RPCBIND_DEBUG
+ if (debugging)
+ fprintf(stderr, "%s: %s\n", __func__, uaddr);
+#endif
+ /* XXX: should have used some defined constant here */
+ rpcbs_getaddr(rpcbversnum - 2, regp->r_prog, regp->r_vers,
+ transp->xp_netid, uaddr);
+ return (&uaddr);
+}
+
+/* ARGSUSED */
+void *
+rpcbproc_gettime_com(void *arg __unused, struct svc_req *rqstp __unused,
+ SVCXPRT *transp __unused, rpcvers_t rpcbversnum __unused)
+{
+ static time_t curtime;
+
+ (void)time(&curtime);
+ return (&curtime);
+}
+
+/*
+ * Convert uaddr to taddr. Should be used only by
+ * local servers/clients. (kernel level stuff only)
+ */
+/* ARGSUSED */
+void *
+rpcbproc_uaddr2taddr_com(void *arg, struct svc_req *rqstp __unused,
+ SVCXPRT *transp, rpcvers_t rpcbversnum __unused)
+{
+ char **uaddrp = arg;
+ struct netconfig *nconf;
+ static struct netbuf nbuf;
+ static struct netbuf *taddr;
+
+ netbuffree(taddr);
+ taddr = NULL;
+ if (((nconf = rpcbind_get_conf(transp->xp_netid)) == NULL) ||
+ ((taddr = uaddr2taddr(nconf, *uaddrp)) == NULL)) {
+ memset(&nbuf, 0, sizeof(nbuf));
+ return (&nbuf);
+ }
+ return (taddr);
+}
+
+/*
+ * Convert taddr to uaddr. Should be used only by
+ * local servers/clients. (kernel level stuff only)
+ */
+/* ARGSUSED */
+void *
+rpcbproc_taddr2uaddr_com(void *arg, struct svc_req *rqstp __unused,
+ SVCXPRT *transp, rpcvers_t rpcbversnum __unused)
+{
+ struct netbuf *taddr = arg;
+ static char *uaddr;
+ struct netconfig *nconf;
+
+#ifdef CHEW_FDS
+ int fd;
+
+ if ((fd = open("/dev/null", O_RDONLY)) == -1) {
+ uaddr = strerror(errno);
+ return (&uaddr);
+ }
+#endif /* CHEW_FDS */
+ if (uaddr != NULL && uaddr != nullstring) {
+ free(uaddr);
+ uaddr = NULL;
+ }
+ if (((nconf = rpcbind_get_conf(transp->xp_netid)) == NULL) ||
+ ((uaddr = taddr2uaddr(nconf, taddr)) == NULL)) {
+ uaddr = nullstring;
+ }
+ return (void *)&uaddr;
+}
+
+
+static bool_t
+xdr_encap_parms(XDR *xdrs, struct encap_parms *epp)
+{
+ return (xdr_bytes(xdrs, &(epp->args), (u_int *) &(epp->arglen),
+ RPC_MAXDATASIZE));
+}
+
+/*
+ * XDR remote call arguments. It ignores the address part.
+ * written for XDR_DECODE direction only
+ */
+static bool_t
+xdr_rmtcall_args(XDR *xdrs, struct r_rmtcall_args *cap)
+{
+ /* does not get the address or the arguments */
+ if (xdr_rpcprog(xdrs, &(cap->rmt_prog)) &&
+ xdr_rpcvers(xdrs, &(cap->rmt_vers)) &&
+ xdr_rpcproc(xdrs, &(cap->rmt_proc))) {
+ return (xdr_encap_parms(xdrs, &(cap->rmt_args)));
+ }
+ return (FALSE);
+}
+
+/*
+ * XDR remote call results along with the address. Ignore
+ * program number, version number and proc number.
+ * Written for XDR_ENCODE direction only.
+ */
+static bool_t
+xdr_rmtcall_result(XDR *xdrs, struct r_rmtcall_args *cap)
+{
+ bool_t result;
+
+#ifdef PORTMAP
+ if (cap->rmt_localvers == PMAPVERS) {
+ int h1, h2, h3, h4, p1, p2;
+ u_long port;
+
+ /* interpret the universal address for TCP/IP */
+ if (sscanf(cap->rmt_uaddr, "%d.%d.%d.%d.%d.%d",
+ &h1, &h2, &h3, &h4, &p1, &p2) != 6)
+ return (FALSE);
+ port = ((p1 & 0xff) << 8) + (p2 & 0xff);
+ result = xdr_u_long(xdrs, &port);
+ } else
+#endif
+ if ((cap->rmt_localvers == RPCBVERS) ||
+ (cap->rmt_localvers == RPCBVERS4)) {
+ result = xdr_wrapstring(xdrs, &(cap->rmt_uaddr));
+ } else {
+ return (FALSE);
+ }
+ if (result == TRUE)
+ return (xdr_encap_parms(xdrs, &(cap->rmt_args)));
+ return (FALSE);
+}
+
+/*
+ * only worries about the struct encap_parms part of struct r_rmtcall_args.
+ * The arglen must already be set!!
+ */
+static bool_t
+xdr_opaque_parms(XDR *xdrs, struct r_rmtcall_args *cap)
+{
+ return (xdr_opaque(xdrs, cap->rmt_args.args, cap->rmt_args.arglen));
+}
+
+static struct rmtcallfd_list *rmthead;
+static struct rmtcallfd_list *rmttail;
+
+int
+create_rmtcall_fd(const struct netconfig *nconf)
+{
+ int fd;
+ struct rmtcallfd_list *rmt;
+ SVCXPRT *xprt;
+
+ if ((fd = __rpc_nconf2fd(nconf)) == -1) {
+ if (debugging)
+ fprintf(stderr, "%s: couldn't open \"%s\": %m\n",
+ __func__, nconf->nc_device);
+ return (-1);
+ }
+ xprt = svc_tli_create(fd, 0, NULL, 0, 0);
+ if (xprt == NULL) {
+ if (debugging)
+ fprintf(stderr, "%s: svc_tli_create failed\n",
+ __func__);
+ return (-1);
+ }
+ rmt = malloc(sizeof(*rmt));
+ if (rmt == NULL) {
+ syslog(LOG_ERR, "%s: %m", __func__);
+ return (-1);
+ }
+ rmt->xprt = xprt;
+ rmt->netid = strdup(nconf->nc_netid);
+ xprt->xp_netid = rmt->netid;
+ rmt->fd = fd;
+ rmt->next = NULL;
+ if (rmthead == NULL) {
+ rmthead = rmt;
+ rmttail = rmt;
+ } else {
+ rmttail->next = rmt;
+ rmttail = rmt;
+ }
+ /* XXX not threadsafe */
+ if (fd > svc_maxfd)
+ svc_maxfd = fd;
+ FD_SET(fd, &svc_fdset);
+ return (fd);
+}
+
+static int
+find_rmtcallfd_by_netid(char *netid)
+{
+ struct rmtcallfd_list *rmt;
+
+ for (rmt = rmthead; rmt != NULL; rmt = rmt->next) {
+ if (strcmp(netid, rmt->netid) == 0) {
+ return (rmt->fd);
+ }
+ }
+ return (-1);
+}
+
+static SVCXPRT *
+find_rmtcallxprt_by_fd(int fd)
+{
+ struct rmtcallfd_list *rmt;
+
+ for (rmt = rmthead; rmt != NULL; rmt = rmt->next) {
+ if (fd == rmt->fd) {
+ return (rmt->xprt);
+ }
+ }
+ return (NULL);
+}
+
+
+/*
+ * Call a remote procedure service. This procedure is very quiet when things
+ * go wrong. The proc is written to support broadcast rpc. In the broadcast
+ * case, a machine should shut-up instead of complain, lest the requestor be
+ * overrun with complaints at the expense of not hearing a valid reply.
+ * When receiving a request and verifying that the service exists, we
+ *
+ * receive the request
+ *
+ * open a new TLI endpoint on the same transport on which we received
+ * the original request
+ *
+ * remember the original request's XID (which requires knowing the format
+ * of the svc_dg_data structure)
+ *
+ * forward the request, with a new XID, to the requested service,
+ * remembering the XID used to send this request (for later use in
+ * reassociating the answer with the original request), the requestor's
+ * address, the file descriptor on which the forwarded request is
+ * made and the service's address.
+ *
+ * mark the file descriptor on which we anticipate receiving a reply from
+ * the service and one to select for in our private svc_run procedure
+ *
+ * At some time in the future, a reply will be received from the service to
+ * which we forwarded the request. At that time, we detect that the socket
+ * used was for forwarding (by looking through the finfo structures to see
+ * whether the fd corresponds to one of those) and call handle_reply() to
+ *
+ * receive the reply
+ *
+ * bundle the reply, along with the service's universal address
+ *
+ * create a SVCXPRT structure and use a version of svc_sendreply
+ * that allows us to specify the reply XID and destination, send the reply
+ * to the original requestor.
+ */
+
+void
+rpcbproc_callit_com(struct svc_req *rqstp, SVCXPRT *transp,
+ rpcproc_t reply_type, rpcvers_t versnum)
+{
+ rpcblist_ptr rbl;
+ struct netconfig *nconf;
+ struct netbuf *caller;
+ struct r_rmtcall_args a;
+ char *buf_alloc = NULL, *outbufp;
+ char *outbuf_alloc = NULL;
+ char buf[RPC_BUF_MAX], outbuf[RPC_BUF_MAX];
+ struct netbuf *na = NULL;
+ struct rpc_msg call_msg;
+ int outlen;
+ u_int sendsz;
+ XDR outxdr;
+ AUTH *auth;
+ int fd = -1;
+ char *uaddr, *m_uaddr = NULL, *local_uaddr = NULL;
+ u_int32_t *xidp;
+ struct __rpc_sockinfo si;
+ struct sockaddr *localsa;
+ struct netbuf tbuf;
+
+ if (!__rpc_fd2sockinfo(transp->xp_fd, &si)) {
+ if (reply_type == RPCBPROC_INDIRECT)
+ svcerr_systemerr(transp);
+ return;
+ }
+ if (si.si_socktype != SOCK_DGRAM)
+ return; /* Only datagram type accepted */
+ sendsz = __rpc_get_t_size(si.si_af, si.si_proto, UDPMSGSIZE);
+ if (sendsz == 0) { /* data transfer not supported */
+ if (reply_type == RPCBPROC_INDIRECT)
+ svcerr_systemerr(transp);
+ return;
+ }
+ /*
+ * Should be multiple of 4 for XDR.
+ */
+ sendsz = roundup(sendsz, 4);
+ if (sendsz > RPC_BUF_MAX) {
+#ifdef notyet
+ buf_alloc = alloca(sendsz); /* not in IDR2? */
+#else
+ buf_alloc = malloc(sendsz);
+#endif /* notyet */
+ if (buf_alloc == NULL) {
+ if (debugging)
+ fprintf(stderr, "%s: %m\n", __func__);
+ if (reply_type == RPCBPROC_INDIRECT)
+ svcerr_systemerr(transp);
+ return;
+ }
+ a.rmt_args.args = buf_alloc;
+ } else {
+ a.rmt_args.args = buf;
+ }
+
+ call_msg.rm_xid = 0; /* For error checking purposes */
+ if (!svc_getargs(transp, (xdrproc_t)xdr_rmtcall_args, (char *) &a)) {
+ if (reply_type == RPCBPROC_INDIRECT)
+ svcerr_decode(transp);
+ if (debugging)
+ fprintf(stderr, "%s: svc_getargs failed\n", __func__);
+ goto error;
+ }
+
+ if (!check_callit(transp, &a, versnum)) {
+ svcerr_weakauth(transp);
+ goto error;
+ }
+
+ caller = svc_getrpccaller(transp);
+#ifdef RPCBIND_DEBUG
+ if (debugging) {
+ uaddr = taddr2uaddr(rpcbind_get_conf(transp->xp_netid), caller);
+ fprintf(stderr,
+ "%s: %s %s req for (%lu, %lu, %lu, %s) from %s: ",
+ __func__, versnum == PMAPVERS ? "pmap_rmtcall" :
+ versnum == RPCBVERS ? "rpcb_rmtcall" :
+ versnum == RPCBVERS4 ? "rpcb_indirect" : rpcbind_unknown,
+ reply_type == RPCBPROC_INDIRECT ? "indirect" : "callit",
+ (unsigned long)a.rmt_prog, (unsigned long)a.rmt_vers,
+ (unsigned long)a.rmt_proc, transp->xp_netid,
+ uaddr ? uaddr : rpcbind_unknown);
+ free(uaddr);
+ }
+#endif
+
+ rbl = find_service(a.rmt_prog, a.rmt_vers, transp->xp_netid);
+
+ rpcbs_rmtcall(versnum - 2, reply_type, a.rmt_prog, a.rmt_vers,
+ a.rmt_proc, transp->xp_netid, rbl);
+
+ if (rbl == NULL) {
+#ifdef RPCBIND_DEBUG
+ if (debugging)
+ fprintf(stderr, "not found\n");
+#endif
+ if (reply_type == RPCBPROC_INDIRECT)
+ svcerr_noprog(transp);
+ goto error;
+ }
+ if (rbl->rpcb_map.r_vers != a.rmt_vers) {
+ if (reply_type == RPCBPROC_INDIRECT) {
+ rpcvers_t vers_low, vers_high;
+
+ find_versions(a.rmt_prog, transp->xp_netid,
+ &vers_low, &vers_high);
+ svcerr_progvers(transp, vers_low, vers_high);
+ }
+ goto error;
+ }
+
+#ifdef RPCBIND_DEBUG
+ if (debugging)
+ fprintf(stderr, "found at uaddr %s\n", rbl->rpcb_map.r_addr);
+#endif
+ /*
+ * Check whether this entry is valid and a server is present
+ * Mergeaddr() returns NULL if no such entry is present, and
+ * returns "" if the entry was present but the server is not
+ * present (i.e., it crashed).
+ */
+ if (reply_type == RPCBPROC_INDIRECT) {
+ uaddr = mergeaddr(transp, transp->xp_netid,
+ rbl->rpcb_map.r_addr, NULL);
+ if (uaddr == NULL || uaddr[0] == '\0') {
+ svcerr_noprog(transp);
+ free(uaddr);
+ goto error;
+ }
+ free(uaddr);
+ }
+ nconf = rpcbind_get_conf(transp->xp_netid);
+ if (nconf == NULL) {
+ if (reply_type == RPCBPROC_INDIRECT)
+ svcerr_systemerr(transp);
+ if (debugging)
+ fprintf(stderr, "%s: rpcbind_get_conf failed\n",
+ __func__);
+ goto error;
+ }
+ localsa = local_sa(((struct sockaddr *)caller->buf)->sa_family);
+ if (localsa == NULL) {
+ if (debugging)
+ fprintf(stderr, "%s: no local address\n", __func__);
+ goto error;
+ }
+ tbuf.len = tbuf.maxlen = localsa->sa_len;
+ tbuf.buf = localsa;
+ local_uaddr =
+ addrmerge(&tbuf, rbl->rpcb_map.r_addr, NULL, nconf->nc_netid);
+ m_uaddr = addrmerge(caller, rbl->rpcb_map.r_addr, NULL,
+ nconf->nc_netid);
+#ifdef RPCBIND_DEBUG
+ if (debugging)
+ fprintf(stderr, "%s: merged uaddr %s\n", __func__, m_uaddr);
+#endif
+ if ((fd = find_rmtcallfd_by_netid(nconf->nc_netid)) == -1) {
+ if (reply_type == RPCBPROC_INDIRECT)
+ svcerr_systemerr(transp);
+ goto error;
+ }
+ xidp = __rpcb_get_dg_xidp(transp);
+ switch (forward_register(*xidp, caller, fd, m_uaddr, reply_type,
+ versnum, &call_msg.rm_xid)) {
+ case 1:
+ /* Success; forward_register() will free m_uaddr for us. */
+ m_uaddr = NULL;
+ break;
+ case 0:
+ /*
+ * A duplicate request for the slow server. Let's not
+ * beat on it any more.
+ */
+ if (debugging)
+ fprintf(stderr, "%s: duplicate request\n", __func__);
+ goto error;
+ case -1:
+ /* forward_register failed. Perhaps no memory. */
+ if (debugging)
+ fprintf(stderr, "%s: forward_register failed\n",
+ __func__);
+ goto error;
+ }
+
+#ifdef DEBUG_RMTCALL
+ if (debugging)
+ fprintf(stderr, "%s: original XID %x, new XID %x\n", __func__,
+ *xidp, call_msg.rm_xid);
+#endif
+ call_msg.rm_direction = CALL;
+ call_msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
+ call_msg.rm_call.cb_prog = a.rmt_prog;
+ call_msg.rm_call.cb_vers = a.rmt_vers;
+ if (sendsz > RPC_BUF_MAX) {
+#ifdef notyet
+ outbuf_alloc = alloca(sendsz); /* not in IDR2? */
+#else
+ outbuf_alloc = malloc(sendsz);
+#endif /* notyet */
+ if (outbuf_alloc == NULL) {
+ if (debugging)
+ fprintf(stderr, "%s: %m\n", __func__);
+ if (reply_type == RPCBPROC_INDIRECT)
+ svcerr_systemerr(transp);
+ goto error;
+ }
+ xdrmem_create(&outxdr, outbuf_alloc, sendsz, XDR_ENCODE);
+ } else {
+ xdrmem_create(&outxdr, outbuf, sendsz, XDR_ENCODE);
+ }
+ if (!xdr_callhdr(&outxdr, &call_msg)) {
+ if (reply_type == RPCBPROC_INDIRECT)
+ svcerr_systemerr(transp);
+ if (debugging)
+ fprintf(stderr, "%s: xdr_callhdr failed\n", __func__);
+ goto error;
+ }
+ if (!xdr_u_int32_t(&outxdr, &(a.rmt_proc))) {
+ if (reply_type == RPCBPROC_INDIRECT)
+ svcerr_systemerr(transp);
+ if (debugging)
+ fprintf(stderr, "%s: xdr_u_long failed\n", __func__);
+ goto error;
+ }
+
+ if (rqstp->rq_cred.oa_flavor == AUTH_NULL) {
+ auth = authnone_create();
+ } else if (rqstp->rq_cred.oa_flavor == AUTH_SYS) {
+ struct authunix_parms *au;
+
+ au = (struct authunix_parms *)rqstp->rq_clntcred;
+ auth = authunix_create(au->aup_machname,
+ au->aup_uid, au->aup_gid,
+ au->aup_len, au->aup_gids);
+ if (auth == NULL) /* fall back */
+ auth = authnone_create();
+ } else {
+ /* we do not support any other authentication scheme */
+ if (debugging)
+ fprintf(stderr, "%s: oa_flavor != AUTH_NONE and "
+ "oa_flavor != AUTH_SYS\n", __func__);
+ if (reply_type == RPCBPROC_INDIRECT)
+ svcerr_weakauth(transp); /* XXX too strong.. */
+ goto error;
+ }
+ if (auth == NULL) {
+ if (reply_type == RPCBPROC_INDIRECT)
+ svcerr_systemerr(transp);
+ if (debugging)
+ fprintf(stderr,
+ "%s: authwhatever_create returned NULL\n",
+ __func__);
+ goto error;
+ }
+ if (!AUTH_MARSHALL(auth, &outxdr)) {
+ if (reply_type == RPCBPROC_INDIRECT)
+ svcerr_systemerr(transp);
+ AUTH_DESTROY(auth);
+ if (debugging)
+ fprintf(stderr, "%s: AUTH_MARSHALL failed\n",
+ __func__);
+ goto error;
+ }
+ AUTH_DESTROY(auth);
+ if (!xdr_opaque_parms(&outxdr, &a)) {
+ if (reply_type == RPCBPROC_INDIRECT)
+ svcerr_systemerr(transp);
+ if (debugging)
+ fprintf(stderr, "%s: xdr_opaque_parms failed\n",
+ __func__);
+ goto error;
+ }
+ outlen = (int) XDR_GETPOS(&outxdr);
+ if (outbuf_alloc)
+ outbufp = outbuf_alloc;
+ else
+ outbufp = outbuf;
+
+ na = uaddr2taddr(nconf, local_uaddr);
+ if (!na) {
+ if (reply_type == RPCBPROC_INDIRECT)
+ svcerr_systemerr(transp);
+ goto error;
+ }
+
+ if (sendto(fd, outbufp, outlen, 0, (struct sockaddr *)na->buf, na->len)
+ != outlen) {
+ if (debugging)
+ fprintf(stderr, "%s: sendto failed: %m\n", __func__);
+ if (reply_type == RPCBPROC_INDIRECT)
+ svcerr_systemerr(transp);
+ goto error;
+ }
+ goto out;
+
+error:
+ if (call_msg.rm_xid != 0)
+ (void)free_slot_by_xid(call_msg.rm_xid);
+out:
+ free(local_uaddr);
+ free(buf_alloc);
+ free(outbuf_alloc);
+ netbuffree(na);
+ free(m_uaddr);
+}
+
+/*
+ * Makes an entry into the FIFO for the given request.
+ * Returns 1 on success, 0 if this is a duplicate request, or -1 on error.
+ * *callxidp is set to the xid of the call.
+ */
+static int
+forward_register(u_int32_t caller_xid, struct netbuf *caller_addr,
+ int forward_fd, char *uaddr, rpcproc_t reply_type,
+ rpcvers_t versnum, u_int32_t *callxidp)
+{
+ static u_int32_t lastxid;
+ time_t min_time, time_now;
+ int i, j = 0, entry = -1;
+
+ min_time = FINFO[0].time;
+ time_now = time((time_t *)0);
+ /* initialization */
+ if (lastxid == 0)
+ lastxid = time_now * NFORWARD;
+
+ /*
+ * Check if it is a duplicate entry. Then,
+ * try to find an empty slot. If not available, then
+ * use the slot with the earliest time.
+ */
+ for (i = 0; i < NFORWARD; i++) {
+ if (FINFO[i].flag & FINFO_ACTIVE) {
+ if ((FINFO[i].caller_xid == caller_xid) &&
+ (FINFO[i].reply_type == reply_type) &&
+ (FINFO[i].versnum == versnum) &&
+ (!netbufcmp(FINFO[i].caller_addr,
+ caller_addr))) {
+ FINFO[i].time = time((time_t *)0);
+ return (0); /* Duplicate entry */
+ } else {
+ /* Should we wait any longer */
+ if ((time_now - FINFO[i].time) > MAXTIME_OFF)
+ (void)free_slot_by_index(i);
+ }
+ }
+ if (entry == -1) {
+ if ((FINFO[i].flag & FINFO_ACTIVE) == 0) {
+ entry = i;
+ } else if (FINFO[i].time < min_time) {
+ j = i;
+ min_time = FINFO[i].time;
+ }
+ }
+ }
+ if (entry != -1) {
+ /* use this empty slot */
+ j = entry;
+ } else {
+ (void)free_slot_by_index(j);
+ }
+ if ((FINFO[j].caller_addr = netbufdup(caller_addr)) == NULL) {
+ return (-1);
+ }
+ rpcb_rmtcalls++; /* no of pending calls */
+ FINFO[j].flag = FINFO_ACTIVE;
+ FINFO[j].reply_type = reply_type;
+ FINFO[j].versnum = versnum;
+ FINFO[j].time = time_now;
+ FINFO[j].caller_xid = caller_xid;
+ FINFO[j].forward_fd = forward_fd;
+ /*
+ * Though uaddr is not allocated here, it will still be freed
+ * from free_slot_*().
+ */
+ FINFO[j].uaddr = uaddr;
+ lastxid = lastxid + NFORWARD;
+ /* Don't allow a zero xid below. */
+ if ((u_int32_t)(lastxid + NFORWARD) <= NFORWARD)
+ lastxid = NFORWARD;
+ FINFO[j].forward_xid = lastxid + j; /* encode slot */
+ *callxidp = FINFO[j].forward_xid; /* forward on this xid */
+ return (1);
+}
+
+static struct finfo *
+forward_find(u_int32_t reply_xid)
+{
+ int i;
+
+ i = reply_xid % (u_int32_t)NFORWARD;
+ if ((FINFO[i].flag & FINFO_ACTIVE) &&
+ (FINFO[i].forward_xid == reply_xid)) {
+ return (&FINFO[i]);
+ }
+ return (NULL);
+}
+
+static int
+free_slot_by_xid(u_int32_t xid)
+{
+ int entry;
+
+ entry = xid % (u_int32_t)NFORWARD;
+ return (free_slot_by_index(entry));
+}
+
+static int
+free_slot_by_index(int index)
+{
+ struct finfo *fi;
+
+ fi = &FINFO[index];
+ if (fi->flag & FINFO_ACTIVE) {
+ netbuffree(fi->caller_addr);
+ /* XXX may be too big, but can't access xprt array here */
+ if (fi->forward_fd >= svc_maxfd)
+ svc_maxfd--;
+ free(fi->uaddr);
+ fi->flag &= ~FINFO_ACTIVE;
+ rpcb_rmtcalls--;
+ return (1);
+ }
+ return (0);
+}
+
+static int
+netbufcmp(struct netbuf *n1, struct netbuf *n2)
+{
+ return ((n1->len != n2->len) || memcmp(n1->buf, n2->buf, n1->len));
+}
+
+static bool_t
+netbuf_copybuf(struct netbuf *dst, const struct netbuf *src)
+{
+ assert(src->len <= src->maxlen);
+
+ if (dst->maxlen < src->len || dst->buf == NULL) {
+ free(dst->buf);
+ if ((dst->buf = calloc(1, src->maxlen)) == NULL)
+ return (FALSE);
+ dst->maxlen = src->maxlen;
+ }
+
+ dst->len = src->len;
+ memcpy(dst->buf, src->buf, src->len);
+
+ return (TRUE);
+}
+
+static struct netbuf *
+netbufdup(struct netbuf *ap)
+{
+ struct netbuf *np;
+
+ if ((np = calloc(1, sizeof(struct netbuf))) == NULL)
+ return (NULL);
+ if (netbuf_copybuf(np, ap) == FALSE) {
+ free(np);
+ return (NULL);
+ }
+ return (np);
+}
+
+static void
+netbuffree(struct netbuf *ap)
+{
+
+ if (ap == NULL)
+ return;
+ free(ap->buf);
+ ap->buf = NULL;
+ free(ap);
+}
+
+
+#define MASKVAL (POLLIN | POLLPRI | POLLRDNORM | POLLRDBAND)
+extern bool_t __svc_clean_idle(fd_set *, int, bool_t);
+
+void
+my_svc_run(void)
+{
+ struct pollfd pollfds[FD_SETSIZE + 1];
+ fd_set cleanfds;
+ struct pollfd *p;
+ size_t nfds;
+#ifdef SVC_RUN_DEBUG
+ size_t i;
+#endif
+ int n, poll_ret, check_ret;
+
+ for (;;) {
+ p = pollfds;
+ p->fd = terminate_rfd;
+ p->events = MASKVAL;
+ p++;
+ for (n = 0; n <= svc_maxfd; n++) {
+ if (FD_ISSET(n, &svc_fdset)) {
+ p->fd = n;
+ p->events = MASKVAL;
+ p++;
+ }
+ }
+ nfds = p - pollfds;
+ poll_ret = 0;
+#ifdef SVC_RUN_DEBUG
+ if (debugging) {
+ fprintf(stderr, "%s: polling for read on fd < ",
+ __func__);
+ for (i = 0, p = pollfds; i < nfds; i++, p++)
+ if (p->events)
+ fprintf(stderr, "%d ", p->fd);
+ fprintf(stderr, ">\n");
+ }
+#endif
+ poll_ret = poll(pollfds, nfds, 30 * 1000);
+
+ if (doterminate != 0) {
+ close(rpcbindlockfd);
+#ifdef WARMSTART
+ syslog(LOG_ERR,
+ "rpcbind terminating on signal %d. Restart with \"rpcbind -w\"",
+ (int)doterminate);
+ write_warmstart(); /* Dump yourself */
+#endif
+ exit(2);
+ }
+
+ switch (poll_ret) {
+ case -1:
+ /*
+ * We ignore all errors, continuing with the assumption
+ * that it was set by the signal handlers (or any
+ * other outside event) and not caused by poll().
+ */
+#ifdef SVC_RUN_DEBUG
+ if (debugging) {
+ fprintf(stderr, "%s: poll returned %d: %m\n",
+ __func__, poll_ret);
+ }
+#endif
+ /* FALLTHROUGH */
+ case 0:
+ cleanfds = svc_fdset;
+ __svc_clean_idle(&cleanfds, 30, FALSE);
+ continue;
+ default:
+#ifdef SVC_RUN_DEBUG
+ if (debugging) {
+ fprintf(stderr, "%s: poll returned read fds < ",
+ __func__);
+ for (i = 0, p = pollfds; i < nfds; i++, p++)
+ if (p->revents)
+ fprintf(stderr, "%d (%#x)",
+ p->fd, p->revents);
+ fprintf(stderr, ">\n");
+ }
+#endif
+ /*
+ * If we found as many replies on callback fds
+ * as the number of descriptors selectable which
+ * poll() returned, there can be no more so we
+ * don't call svc_getreq_poll. Otherwise, there
+ * must be another so we must call svc_getreq_poll.
+ */
+ if ((check_ret = check_rmtcalls(pollfds, nfds)) ==
+ poll_ret)
+ continue;
+ svc_getreq_poll(pollfds, poll_ret-check_ret);
+ }
+#ifdef SVC_RUN_DEBUG
+ if (debugging) {
+ fprintf(stderr, "%s: svc_maxfd now %u\n", __func__,
+ svc_maxfd);
+ }
+#endif
+ }
+}
+
+static int
+check_rmtcalls(struct pollfd *pfds, int nfds)
+{
+ int j, ncallbacks_found = 0, rmtcalls_pending;
+ SVCXPRT *xprt;
+
+ if (rpcb_rmtcalls == 0)
+ return (0);
+
+ rmtcalls_pending = rpcb_rmtcalls;
+ for (j = 0; j < nfds; j++) {
+ if ((xprt = find_rmtcallxprt_by_fd(pfds[j].fd)) != NULL) {
+ if (pfds[j].revents) {
+ ncallbacks_found++;
+#ifdef DEBUG_RMTCALL
+ if (debugging)
+ fprintf(stderr, "%s: polled on forwarding "
+ "fd %d, netid %s - calling handle_reply\n",
+ __func__, pfds[j].fd, xprt->xp_netid);
+#endif
+ handle_reply(pfds[j].fd, xprt);
+ pfds[j].revents = 0;
+ if (ncallbacks_found >= rmtcalls_pending) {
+ break;
+ }
+ }
+ }
+ }
+ return (ncallbacks_found);
+}
+
+static void
+xprt_set_caller(SVCXPRT *xprt, struct finfo *fi)
+{
+ u_int32_t *xidp;
+
+ netbuf_copybuf(svc_getrpccaller(xprt), fi->caller_addr);
+ xidp = __rpcb_get_dg_xidp(xprt);
+ *xidp = fi->caller_xid;
+}
+
+/*
+ * Call svcerr_systemerr() only if RPCBVERS4
+ */
+static void
+send_svcsyserr(SVCXPRT *xprt, struct finfo *fi)
+{
+ if (fi->reply_type == RPCBPROC_INDIRECT) {
+ xprt_set_caller(xprt, fi);
+ svcerr_systemerr(xprt);
+ }
+}
+
+static void
+handle_reply(int fd, SVCXPRT *xprt)
+{
+ XDR reply_xdrs;
+ struct rpc_msg reply_msg;
+ struct rpc_err reply_error;
+ char *buffer;
+ struct finfo *fi;
+ int inlen, pos, len;
+ struct r_rmtcall_args a;
+ struct sockaddr_storage ss;
+ socklen_t fromlen;
+#ifdef SVC_RUN_DEBUG
+ char *uaddr;
+#endif
+
+ buffer = malloc(RPC_BUF_MAX);
+ if (buffer == NULL)
+ goto done;
+
+ do {
+ fromlen = sizeof(ss);
+ inlen = recvfrom(fd, buffer, RPC_BUF_MAX, 0,
+ (struct sockaddr *)&ss, &fromlen);
+ } while (inlen < 0 && errno == EINTR);
+ if (inlen < 0) {
+ if (debugging)
+ fprintf(stderr, "%s: recvfrom returned %d: %m\n",
+ __func__, inlen);
+ goto done;
+ }
+
+ reply_msg.acpted_rply.ar_verf = _null_auth;
+ reply_msg.acpted_rply.ar_results.where = 0;
+ reply_msg.acpted_rply.ar_results.proc = (xdrproc_t)xdr_void;
+
+ xdrmem_create(&reply_xdrs, buffer, (u_int)inlen, XDR_DECODE);
+ if (!xdr_replymsg(&reply_xdrs, &reply_msg)) {
+ if (debugging)
+ fprintf(stderr, "%s: xdr_replymsg failed\n", __func__);
+ goto done;
+ }
+ fi = forward_find(reply_msg.rm_xid);
+#ifdef SVC_RUN_DEBUG
+ if (debugging) {
+ fprintf(stderr, "%s: reply xid: %d fi addr: %p\n",
+ __func__, reply_msg.rm_xid, fi);
+ }
+#endif
+ if (fi == NULL) {
+ goto done;
+ }
+ _seterr_reply(&reply_msg, &reply_error);
+ if (reply_error.re_status != RPC_SUCCESS) {
+ if (debugging)
+ fprintf(stderr, "%s: %s\n", __func__,
+ clnt_sperrno(reply_error.re_status));
+ send_svcsyserr(xprt, fi);
+ goto done;
+ }
+ pos = XDR_GETPOS(&reply_xdrs);
+ len = inlen - pos;
+ a.rmt_args.args = &buffer[pos];
+ a.rmt_args.arglen = len;
+ a.rmt_uaddr = fi->uaddr;
+ a.rmt_localvers = fi->versnum;
+
+ xprt_set_caller(xprt, fi);
+#ifdef SVC_RUN_DEBUG
+ uaddr = taddr2uaddr(rpcbind_get_conf("udp"),
+ svc_getrpccaller(xprt));
+ if (debugging) {
+ fprintf(stderr, "%s: forwarding address %s to %s\n",
+ __func__, a.rmt_uaddr, uaddr ? uaddr : rpcbind_unknown);
+ }
+ free(uaddr);
+#endif
+ svc_sendreply(xprt, (xdrproc_t)xdr_rmtcall_result, &a);
+done:
+ free(buffer);
+
+ if (reply_msg.rm_xid == 0) {
+#ifdef SVC_RUN_DEBUG
+ if (debugging) {
+ fprintf(stderr, "%s: NULL xid on exit!\n", __func__);
+ }
+#endif
+ } else
+ (void)free_slot_by_xid(reply_msg.rm_xid);
+}
+
+static void
+find_versions(rpcprog_t prog, const char *netid, rpcvers_t *lowvp,
+ rpcvers_t *highvp)
+{
+ rpcblist_ptr rbl;
+ rpcvers_t lowv = 0;
+ rpcvers_t highv = 0;
+
+ for (rbl = list_rbl; rbl != NULL; rbl = rbl->rpcb_next) {
+ if ((rbl->rpcb_map.r_prog != prog) ||
+ ((rbl->rpcb_map.r_netid != NULL) &&
+ (strcasecmp(rbl->rpcb_map.r_netid, netid) != 0)))
+ continue;
+ if (lowv == 0) {
+ highv = rbl->rpcb_map.r_vers;
+ lowv = highv;
+ } else if (rbl->rpcb_map.r_vers < lowv) {
+ lowv = rbl->rpcb_map.r_vers;
+ } else if (rbl->rpcb_map.r_vers > highv) {
+ highv = rbl->rpcb_map.r_vers;
+ }
+ }
+ *lowvp = lowv;
+ *highvp = highv;
+}
+
+/*
+ * returns the item with the given program, version number and netid.
+ * If that version number is not found, it returns the item with that
+ * program number, so that address is now returned to the caller. The
+ * caller when makes a call to this program, version number, the call
+ * will fail and it will return with PROGVERS_MISMATCH. The user can
+ * then determine the highest and the lowest version number for this
+ * program using clnt_geterr() and use those program version numbers.
+ *
+ * Returns the RPCBLIST for the given prog, vers and netid
+ */
+static rpcblist_ptr
+find_service(rpcprog_t prog, rpcvers_t vers, char *netid)
+{
+ rpcblist_ptr hit = NULL;
+ rpcblist_ptr rbl;
+
+ for (rbl = list_rbl; rbl != NULL; rbl = rbl->rpcb_next) {
+ if ((rbl->rpcb_map.r_prog != prog) ||
+ ((rbl->rpcb_map.r_netid != NULL) &&
+ (strcasecmp(rbl->rpcb_map.r_netid, netid) != 0)))
+ continue;
+ hit = rbl;
+ if (rbl->rpcb_map.r_vers == vers)
+ break;
+ }
+ return (hit);
+}
+
+/*
+ * Copies the name associated with the uid of the caller and returns
+ * a pointer to it. Similar to getwd().
+ */
+static char *
+getowner(SVCXPRT *transp, char *owner, size_t ownersize)
+{
+ uid_t uid;
+
+ if (__rpc_get_local_uid(transp, &uid) < 0)
+ strlcpy(owner, rpcbind_unknown, ownersize);
+ else if (uid == 0)
+ strlcpy(owner, rpcbind_superuser, ownersize);
+ else
+ snprintf(owner, ownersize, "%d", uid);
+
+ return owner;
+}
+
+#ifdef PORTMAP
+/*
+ * Add this to the pmap list only if it is UDP or TCP.
+ */
+static int
+add_pmaplist(RPCB *arg)
+{
+ struct pmap pmap;
+ struct pmaplist *pml;
+ int h1, h2, h3, h4, p1, p2;
+
+ if (strcmp(arg->r_netid, udptrans) == 0) {
+ /* It is UDP! */
+ pmap.pm_prot = IPPROTO_UDP;
+ } else if (strcmp(arg->r_netid, tcptrans) == 0) {
+ /* It is TCP */
+ pmap.pm_prot = IPPROTO_TCP;
+ } else
+ /* Not an IP protocol */
+ return (0);
+
+ /* interpret the universal address for TCP/IP */
+ if (sscanf(arg->r_addr, "%d.%d.%d.%d.%d.%d",
+ &h1, &h2, &h3, &h4, &p1, &p2) != 6)
+ return (0);
+ pmap.pm_port = ((p1 & 0xff) << 8) + (p2 & 0xff);
+ pmap.pm_prog = arg->r_prog;
+ pmap.pm_vers = arg->r_vers;
+ /*
+ * add to END of list
+ */
+ pml = malloc(sizeof(*pml));
+ if (pml == NULL) {
+ syslog(LOG_ERR, "%s: %m", __func__);
+ return (1);
+ }
+ pml->pml_map = pmap;
+ pml->pml_next = NULL;
+ if (list_pml == NULL) {
+ list_pml = pml;
+ } else {
+ struct pmaplist *fnd;
+
+ /* Attach to the end of the list */
+ for (fnd = list_pml; fnd->pml_next; fnd = fnd->pml_next)
+ continue;
+ fnd->pml_next = pml;
+ }
+ return (0);
+}
+
+/*
+ * Delete this from the pmap list only if it is UDP or TCP.
+ */
+static int
+del_pmaplist(RPCB *arg)
+{
+ struct pmaplist *pml;
+ struct pmaplist *prevpml, *fnd;
+ unsigned long prot;
+
+ if (strcmp(arg->r_netid, udptrans) == 0) {
+ /* It is UDP! */
+ prot = IPPROTO_UDP;
+ } else if (strcmp(arg->r_netid, tcptrans) == 0) {
+ /* It is TCP */
+ prot = IPPROTO_TCP;
+ } else if (arg->r_netid[0] == 0) {
+ prot = 0; /* Remove all occurrences */
+ } else {
+ /* Not an IP protocol */
+ return (0);
+ }
+ for (prevpml = NULL, pml = list_pml; pml; /* cstyle */) {
+ if ((pml->pml_map.pm_prog != arg->r_prog) ||
+ (pml->pml_map.pm_vers != arg->r_vers) ||
+ (prot && (pml->pml_map.pm_prot != prot))) {
+ /* both pml & prevpml move forwards */
+ prevpml = pml;
+ pml = pml->pml_next;
+ continue;
+ }
+ /* found it; pml moves forward, prevpml stays */
+ fnd = pml;
+ pml = pml->pml_next;
+ if (prevpml == NULL)
+ list_pml = pml;
+ else
+ prevpml->pml_next = pml;
+ free(fnd);
+ }
+ return (0);
+}
+#endif /* PORTMAP */
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-30 19:16:21 +0000