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Diffstat (limited to 'src/lib/rpc/svc_tcp.c')
-rw-r--r--src/lib/rpc/svc_tcp.c536
1 files changed, 536 insertions, 0 deletions
diff --git a/src/lib/rpc/svc_tcp.c b/src/lib/rpc/svc_tcp.c
new file mode 100644
index 000000000000..d78cf55a7419
--- /dev/null
+++ b/src/lib/rpc/svc_tcp.c
@@ -0,0 +1,536 @@
+/* @(#)svc_tcp.c 2.2 88/08/01 4.0 RPCSRC */
+/*
+ * Copyright (c) 2010, Oracle America, 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 the "Oracle America, 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.
+ */
+#if !defined(lint) && defined(SCCSIDS)
+static char sccsid[] = "@(#)svc_tcp.c 1.21 87/08/11 Copyr 1984 Sun Micro";
+#endif
+
+/*
+ * svc_tcp.c, Server side for TCP/IP based RPC.
+ *
+ * Actually implements two flavors of transporter -
+ * a tcp rendezvouser (a listner and connection establisher)
+ * and a record/tcp stream.
+ */
+
+#include "k5-platform.h"
+#include <unistd.h>
+#include <gssrpc/rpc.h>
+#include <sys/socket.h>
+#include <port-sockets.h>
+#include <socket-utils.h>
+/*extern bool_t abort();
+extern errno;
+*/
+
+#ifndef FD_SETSIZE
+#ifdef NBBY
+#define NOFILE (sizeof(int) * NBBY)
+#else
+#define NOFILE (sizeof(int) * 8)
+#endif
+#endif
+
+/*
+ * Ops vector for TCP/IP based rpc service handle
+ */
+static bool_t svctcp_recv(SVCXPRT *, struct rpc_msg *);
+static enum xprt_stat svctcp_stat(SVCXPRT *);
+static bool_t svctcp_getargs(SVCXPRT *, xdrproc_t, void *);
+static bool_t svctcp_reply(SVCXPRT *, struct rpc_msg *);
+static bool_t svctcp_freeargs(SVCXPRT *, xdrproc_t, void *);
+static void svctcp_destroy(SVCXPRT *);
+
+static struct xp_ops svctcp_op = {
+ svctcp_recv,
+ svctcp_stat,
+ svctcp_getargs,
+ svctcp_reply,
+ svctcp_freeargs,
+ svctcp_destroy
+};
+
+/*
+ * Ops vector for TCP/IP rendezvous handler
+ */
+static bool_t rendezvous_request(SVCXPRT *, struct rpc_msg *);
+static bool_t abortx(void);
+static bool_t abortx_getargs(SVCXPRT *, xdrproc_t, void *);
+static bool_t abortx_reply(SVCXPRT *, struct rpc_msg *);
+static bool_t abortx_freeargs(SVCXPRT *, xdrproc_t, void *);
+static enum xprt_stat rendezvous_stat(SVCXPRT *);
+
+static struct xp_ops svctcp_rendezvous_op = {
+ rendezvous_request,
+ rendezvous_stat,
+ abortx_getargs,
+ abortx_reply,
+ abortx_freeargs,
+ svctcp_destroy
+};
+
+static int readtcp(char *, caddr_t, int), writetcp(char *, caddr_t, int);
+static SVCXPRT *makefd_xprt(int, u_int, u_int);
+
+struct tcp_rendezvous { /* kept in xprt->xp_p1 */
+ u_int sendsize;
+ u_int recvsize;
+};
+
+struct tcp_conn { /* kept in xprt->xp_p1 */
+ enum xprt_stat strm_stat;
+ uint32_t x_id;
+ XDR xdrs;
+ char verf_body[MAX_AUTH_BYTES];
+};
+
+/*
+ * Usage:
+ * xprt = svctcp_create(sock, send_buf_size, recv_buf_size);
+ *
+ * Creates, registers, and returns a (rpc) tcp based transporter.
+ * Once *xprt is initialized, it is registered as a transporter
+ * see (svc.h, xprt_register). This routine returns
+ * a NULL if a problem occurred.
+ *
+ * If sock<0 then a socket is created, else sock is used.
+ * If the socket, sock is not bound to a port then svctcp_create
+ * binds it to an arbitrary port. The routine then starts a tcp
+ * listener on the socket's associated port. In any (successful) case,
+ * xprt->xp_sock is the registered socket number and xprt->xp_port is the
+ * associated port number.
+ *
+ * Since tcp streams do buffered io similar to stdio, the caller can specify
+ * how big the send and receive buffers are via the second and third parms;
+ * 0 => use the system default.
+ */
+SVCXPRT *
+svctcp_create(
+ SOCKET sock,
+ u_int sendsize,
+ u_int recvsize)
+{
+ bool_t madesock = FALSE;
+ register SVCXPRT *xprt;
+ register struct tcp_rendezvous *r;
+ struct sockaddr_storage ss;
+ struct sockaddr *sa = (struct sockaddr *)&ss;
+ socklen_t len;
+
+ if (sock == RPC_ANYSOCK) {
+ if ((sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) {
+ perror("svctcp_.c - udp socket creation problem");
+ return ((SVCXPRT *)NULL);
+ }
+ set_cloexec_fd(sock);
+ madesock = TRUE;
+ memset(&ss, 0, sizeof(ss));
+ sa->sa_family = AF_INET;
+ } else {
+ len = sizeof(struct sockaddr_storage);
+ if (getsockname(sock, sa, &len) != 0) {
+ perror("svc_tcp.c - cannot getsockname");
+ return ((SVCXPRT *)NULL);
+ }
+ }
+
+ if (bindresvport_sa(sock, sa)) {
+ sa_setport(sa, 0);
+ (void)bind(sock, sa, sa_socklen(sa));
+ }
+ len = sizeof(struct sockaddr_storage);
+ if (getsockname(sock, sa, &len) != 0) {
+ perror("svc_tcp.c - cannot getsockname");
+ if (madesock)
+ (void)closesocket(sock);
+ return ((SVCXPRT *)NULL);
+ }
+ if (listen(sock, 2) != 0) {
+ perror("svctcp_.c - cannot listen");
+ if (madesock)
+ (void)closesocket(sock);
+ return ((SVCXPRT *)NULL);
+ }
+ r = (struct tcp_rendezvous *)mem_alloc(sizeof(*r));
+ if (r == NULL) {
+ (void) fprintf(stderr, "svctcp_create: out of memory\n");
+ return (NULL);
+ }
+ r->sendsize = sendsize;
+ r->recvsize = recvsize;
+ xprt = (SVCXPRT *)mem_alloc(sizeof(SVCXPRT));
+ if (xprt == NULL) {
+ (void) fprintf(stderr, "svctcp_create: out of memory\n");
+ return (NULL);
+ }
+ xprt->xp_p2 = NULL;
+ xprt->xp_p1 = (caddr_t)r;
+ xprt->xp_auth = NULL;
+ xprt->xp_verf = gssrpc__null_auth;
+ xprt->xp_ops = &svctcp_rendezvous_op;
+ xprt->xp_port = sa_getport(sa);
+ xprt->xp_sock = sock;
+ xprt->xp_laddrlen = 0;
+ xprt_register(xprt);
+ return (xprt);
+}
+
+/*
+ * Like svtcp_create(), except the routine takes any *open* UNIX file
+ * descriptor as its first input.
+ */
+SVCXPRT *
+svcfd_create(
+ int fd,
+ u_int sendsize,
+ u_int recvsize)
+{
+
+ return (makefd_xprt(fd, sendsize, recvsize));
+}
+
+static SVCXPRT *
+makefd_xprt(
+ int fd,
+ u_int sendsize,
+ u_int recvsize)
+{
+ register SVCXPRT *xprt;
+ register struct tcp_conn *cd;
+
+#ifdef FD_SETSIZE
+ if (fd >= FD_SETSIZE) {
+ (void) fprintf(stderr, "svc_tcp: makefd_xprt: fd too high\n");
+ xprt = NULL;
+ goto done;
+ }
+#else
+ if (fd >= NOFILE) {
+ (void) fprintf(stderr, "svc_tcp: makefd_xprt: fd too high\n");
+ xprt = NULL;
+ goto done;
+ }
+#endif
+ xprt = (SVCXPRT *)mem_alloc(sizeof(SVCXPRT));
+ if (xprt == (SVCXPRT *)NULL) {
+ (void) fprintf(stderr, "svc_tcp: makefd_xprt: out of memory\n");
+ goto done;
+ }
+ cd = (struct tcp_conn *)mem_alloc(sizeof(struct tcp_conn));
+ if (cd == (struct tcp_conn *)NULL) {
+ (void) fprintf(stderr, "svc_tcp: makefd_xprt: out of memory\n");
+ mem_free((char *) xprt, sizeof(SVCXPRT));
+ xprt = (SVCXPRT *)NULL;
+ goto done;
+ }
+ cd->strm_stat = XPRT_IDLE;
+ xdrrec_create(&(cd->xdrs), sendsize, recvsize,
+ (caddr_t)xprt, readtcp, writetcp);
+ xprt->xp_p2 = NULL;
+ xprt->xp_p1 = (caddr_t)cd;
+ xprt->xp_auth = NULL;
+ xprt->xp_verf.oa_base = cd->verf_body;
+ xprt->xp_addrlen = 0;
+ xprt->xp_laddrlen = 0;
+ xprt->xp_ops = &svctcp_op; /* truely deals with calls */
+ xprt->xp_port = 0; /* this is a connection, not a rendezvouser */
+ xprt->xp_sock = fd;
+ xprt_register(xprt);
+ done:
+ return (xprt);
+}
+
+static bool_t
+rendezvous_request(
+ register SVCXPRT *xprt,
+ struct rpc_msg *msg)
+{
+ SOCKET sock;
+ struct tcp_rendezvous *r;
+ struct sockaddr_in addr, laddr;
+ socklen_t len, llen;
+
+ r = (struct tcp_rendezvous *)xprt->xp_p1;
+ again:
+ len = llen = sizeof(struct sockaddr_in);
+ if ((sock = accept(xprt->xp_sock, (struct sockaddr *)&addr,
+ &len)) < 0) {
+ if (errno == EINTR)
+ goto again;
+ return (FALSE);
+ }
+ set_cloexec_fd(sock);
+ if (getsockname(sock, (struct sockaddr *) &laddr, &llen) < 0)
+ return (FALSE);
+
+ /*
+ * make a new transporter (re-uses xprt)
+ */
+ xprt = makefd_xprt(sock, r->sendsize, r->recvsize);
+ if (xprt == NULL) {
+ (void)closesocket(sock);
+ return (FALSE);
+ }
+ xprt->xp_raddr = addr;
+ xprt->xp_addrlen = len;
+ xprt->xp_laddr = laddr;
+ xprt->xp_laddrlen = llen;
+ return (FALSE); /* there is never an rpc msg to be processed */
+}
+
+static enum xprt_stat
+rendezvous_stat(register SVCXPRT *xprt)
+{
+
+ return (XPRT_IDLE);
+}
+
+static void
+svctcp_destroy(register SVCXPRT *xprt)
+{
+ register struct tcp_conn *cd = (struct tcp_conn *)xprt->xp_p1;
+
+ xprt_unregister(xprt);
+ (void)closesocket(xprt->xp_sock);
+ if (xprt->xp_port != 0) {
+ /* a rendezvouser socket */
+ xprt->xp_port = 0;
+ } else {
+ /* an actual connection socket */
+ XDR_DESTROY(&(cd->xdrs));
+ }
+ if (xprt->xp_auth != NULL) {
+ SVCAUTH_DESTROY(xprt->xp_auth);
+ xprt->xp_auth = NULL;
+ }
+ mem_free((caddr_t)cd, sizeof(struct tcp_conn));
+ mem_free((caddr_t)xprt, sizeof(SVCXPRT));
+}
+
+/*
+ * All read operations timeout after 35 seconds.
+ * A timeout is fatal for the connection.
+ */
+static struct timeval wait_per_try = { 35, 0 };
+
+/*
+ * reads data from the tcp conection.
+ * any error is fatal and the connection is closed.
+ * (And a read of zero bytes is a half closed stream => error.)
+ */
+static int
+readtcp(
+ char *xprtptr,
+ caddr_t buf,
+ register int len)
+{
+ register SVCXPRT *xprt = (SVCXPRT *)(void *)xprtptr;
+ register int sock = xprt->xp_sock;
+ struct timeval tout;
+#ifdef FD_SETSIZE
+ fd_set mask;
+ fd_set readfds;
+
+ FD_ZERO(&mask);
+ FD_SET(sock, &mask);
+#else
+ register int mask = 1 << sock;
+ int readfds;
+#endif /* def FD_SETSIZE */
+#ifdef FD_SETSIZE
+#define loopcond (!FD_ISSET(sock, &readfds))
+#else
+#define loopcond (readfds != mask)
+#endif
+ do {
+ readfds = mask;
+ tout = wait_per_try;
+ if (select(sock + 1, &readfds, (fd_set*)NULL,
+ (fd_set*)NULL, &tout) <= 0) {
+ if (errno == EINTR) {
+ continue;
+ }
+ goto fatal_err;
+ }
+ } while (loopcond);
+ if ((len = read(sock, buf, (size_t) len)) > 0) {
+ return (len);
+ }
+fatal_err:
+ ((struct tcp_conn *)(xprt->xp_p1))->strm_stat = XPRT_DIED;
+ return (-1);
+}
+
+/*
+ * writes data to the tcp connection.
+ * Any error is fatal and the connection is closed.
+ */
+static int
+writetcp(
+ char *xprtptr,
+ caddr_t buf,
+ int len)
+{
+ register SVCXPRT *xprt = (SVCXPRT *)(void *) xprtptr;
+ register int i, cnt;
+
+ for (cnt = len; cnt > 0; cnt -= i, buf += i) {
+ if ((i = write(xprt->xp_sock, buf, (size_t) cnt)) < 0) {
+ ((struct tcp_conn *)(xprt->xp_p1))->strm_stat =
+ XPRT_DIED;
+ return (-1);
+ }
+ }
+ return (len);
+}
+
+static enum xprt_stat
+svctcp_stat(SVCXPRT *xprt)
+{
+ register struct tcp_conn *cd =
+ (struct tcp_conn *)(xprt->xp_p1);
+
+ if (cd->strm_stat == XPRT_DIED)
+ return (XPRT_DIED);
+ if (! xdrrec_eof(&(cd->xdrs)))
+ return (XPRT_MOREREQS);
+ return (XPRT_IDLE);
+}
+
+static bool_t
+svctcp_recv(
+ SVCXPRT *xprt,
+ register struct rpc_msg *msg)
+{
+ register struct tcp_conn *cd =
+ (struct tcp_conn *)(xprt->xp_p1);
+ register XDR *xdrs = &(cd->xdrs);
+
+ xdrs->x_op = XDR_DECODE;
+ (void)xdrrec_skiprecord(xdrs);
+ if (xdr_callmsg(xdrs, msg)) {
+ cd->x_id = msg->rm_xid;
+ return (TRUE);
+ }
+ return (FALSE);
+}
+
+static bool_t
+svctcp_getargs(
+ SVCXPRT *xprt,
+ xdrproc_t xdr_args,
+ void *args_ptr)
+{
+ if (! SVCAUTH_UNWRAP(xprt->xp_auth,
+ &(((struct tcp_conn *)(xprt->xp_p1))->xdrs),
+ xdr_args, args_ptr)) {
+ (void)svctcp_freeargs(xprt, xdr_args, args_ptr);
+ return FALSE;
+ }
+ return TRUE;
+}
+
+static bool_t
+svctcp_freeargs(
+ SVCXPRT *xprt,
+ xdrproc_t xdr_args,
+ void * args_ptr)
+{
+ register XDR *xdrs =
+ &(((struct tcp_conn *)(xprt->xp_p1))->xdrs);
+
+ xdrs->x_op = XDR_FREE;
+ return ((*xdr_args)(xdrs, args_ptr));
+}
+
+static bool_t svctcp_reply(
+ SVCXPRT *xprt,
+ register struct rpc_msg *msg)
+{
+ register struct tcp_conn *cd =
+ (struct tcp_conn *)(xprt->xp_p1);
+ register XDR *xdrs = &(cd->xdrs);
+ register bool_t stat;
+
+ xdrproc_t xdr_results = NULL;
+ caddr_t xdr_location = 0;
+ bool_t has_args;
+
+ if (msg->rm_reply.rp_stat == MSG_ACCEPTED &&
+ msg->rm_reply.rp_acpt.ar_stat == SUCCESS) {
+ has_args = TRUE;
+ xdr_results = msg->acpted_rply.ar_results.proc;
+ xdr_location = msg->acpted_rply.ar_results.where;
+
+ msg->acpted_rply.ar_results.proc = xdr_void;
+ msg->acpted_rply.ar_results.where = NULL;
+ } else
+ has_args = FALSE;
+
+ xdrs->x_op = XDR_ENCODE;
+ msg->rm_xid = cd->x_id;
+ stat = FALSE;
+ if (xdr_replymsg(xdrs, msg) &&
+ (!has_args ||
+ (SVCAUTH_WRAP(xprt->xp_auth, xdrs, xdr_results, xdr_location)))) {
+ stat = TRUE;
+ }
+ (void)xdrrec_endofrecord(xdrs, TRUE);
+ return (stat);
+}
+
+static bool_t abortx(void)
+{
+ abort();
+ return 1;
+}
+
+static bool_t abortx_getargs(
+ SVCXPRT *xprt,
+ xdrproc_t proc,
+ void *info)
+{
+ return abortx();
+}
+
+static bool_t abortx_reply(SVCXPRT *xprt, struct rpc_msg *msg)
+{
+ return abortx();
+}
+
+static bool_t abortx_freeargs(
+ SVCXPRT *xprt, xdrproc_t proc,
+ void * info)
+{
+ return abortx();
+}
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