+++ /dev/null
-/*
- * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
- * unrestricted use provided that this legend is included on all tape
- * media and as a part of the software program in whole or part. Users
- * may copy or modify Sun RPC without charge, but are not authorized
- * to license or distribute it to anyone else except as part of a product or
- * program developed by the user.
- *
- * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
- * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
- *
- * Sun RPC is provided with no support and without any obligation on the
- * part of Sun Microsystems, Inc. to assist in its use, correction,
- * modification or enhancement.
- *
- * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
- * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
- * OR ANY PART THEREOF.
- *
- * In no event will Sun Microsystems, Inc. be liable for any lost revenue
- * or profits or other special, indirect and consequential damages, even if
- * Sun has been advised of the possibility of such damages.
- *
- * Sun Microsystems, Inc.
- * 2550 Garcia Avenue
- * Mountain View, California 94043
- */
-
-#if defined(LIBC_SCCS) && !defined(lint)
-static char *rcsid = "$OpenBSD: svc_tcp.c,v 1.18 1998/05/22 04:23:01 deraadt Exp $";
-#endif /* LIBC_SCCS and not lint */
-
-/*
- * svc_tcp.c, Server side for TCP/IP based RPC.
- *
- * Copyright (C) 1984, Sun Microsystems, Inc.
- *
- * Actually implements two flavors of transporter -
- * a tcp rendezvouser (a listner and connection establisher)
- * and a record/tcp stream.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <rpc/rpc.h>
-#include <sys/param.h>
-#include <sys/socket.h>
-#include <errno.h>
-
-#include <netinet/in_systm.h>
-#include <netinet/in.h>
-#include <netinet/ip.h>
-#ifndef __linux__
-#include <netinet/ip_var.h>
-#endif
-
-/*
- * Ops vector for TCP/IP based rpc service handle
- */
-static bool_t svctcp_recv();
-static enum xprt_stat svctcp_stat();
-static bool_t svctcp_getargs();
-static bool_t svctcp_reply();
-static bool_t svctcp_freeargs();
-static void svctcp_destroy();
-
-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();
-static enum xprt_stat rendezvous_stat();
-
-static struct xp_ops svctcp_rendezvous_op = {
- rendezvous_request,
- rendezvous_stat,
- (bool_t (*)())abort,
- (bool_t (*)())abort,
- (bool_t (*)())abort,
- svctcp_destroy
-};
-
-static int readtcp(), writetcp();
-static SVCXPRT *makefd_xprt();
-
-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;
- u_long 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(sock, sendsize, recvsize)
- register int sock;
- u_int sendsize;
- u_int recvsize;
-{
- bool_t madesock = FALSE;
- register SVCXPRT *xprt;
- register struct tcp_rendezvous *r;
- struct sockaddr_in addr;
- int len = sizeof(struct sockaddr_in);
-
- if (sock == RPC_ANYSOCK) {
- if ((sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) {
- perror("svctcp_.c - udp socket creation problem");
- return ((SVCXPRT *)NULL);
- }
- madesock = TRUE;
- }
- memset(&addr, 0, sizeof (addr));
-#ifndef __linux__
- addr.sin_len = sizeof(struct sockaddr_in);
-#endif
- addr.sin_family = AF_INET;
- if (bindresvport(sock, &addr)) {
- addr.sin_port = 0;
- (void)bind(sock, (struct sockaddr *)&addr, len);
- }
- if ((getsockname(sock, (struct sockaddr *)&addr, &len) != 0) ||
- (listen(sock, 2) != 0)) {
- perror("svctcp_.c - cannot getsockname or listen");
- if (madesock)
- (void)close(sock);
- return ((SVCXPRT *)NULL);
- }
- r = (struct tcp_rendezvous *)mem_alloc(sizeof(*r));
- if (r == NULL) {
- (void)fprintf(stderr, "svctcp_create: out of memory\n");
- if (madesock)
- (void)close(sock);
- 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");
- if (madesock)
- (void)close(sock);
- free(r);
- return (NULL);
- }
- xprt->xp_p2 = NULL;
- xprt->xp_p1 = (caddr_t)r;
- xprt->xp_auth = NULL;
- xprt->xp_verf = _null_auth;
- xprt->xp_ops = &svctcp_rendezvous_op;
- xprt->xp_port = ntohs(addr.sin_port);
- xprt->xp_sock = sock;
- xprt_register(xprt);
- return (xprt);
-}
-
-/*
- * Like svtcp_create(), except the routine takes any *open* UNIX file
- * descriptor as its first input.
- */
-SVCXPRT *
-svcfd_create(fd, sendsize, recvsize)
- int fd;
- u_int sendsize;
- u_int recvsize;
-{
-
- return (makefd_xprt(fd, sendsize, recvsize));
-}
-
-static SVCXPRT *
-makefd_xprt(fd, sendsize, recvsize)
- int fd;
- u_int sendsize;
- u_int recvsize;
-{
- register SVCXPRT *xprt;
- register struct tcp_conn *cd;
-
- 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_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(xprt)
- register SVCXPRT *xprt;
-{
- int sock;
- struct tcp_rendezvous *r;
- struct sockaddr_in addr;
- int len;
-
- r = (struct tcp_rendezvous *)xprt->xp_p1;
- again:
- len = sizeof(struct sockaddr_in);
- if ((sock = accept(xprt->xp_sock, (struct sockaddr *)&addr,
- &len)) < 0) {
- if (errno == EINTR)
- goto again;
- return (FALSE);
- }
-
-#ifdef IP_OPTIONS
- {
-#ifdef __linux__
-#define ipopt_list ip_opts
- struct ip_opts opts;
-#else
- struct ipoption opts;
-#endif
- int optsize = sizeof(opts), i;
-
- if (!getsockopt(sock, IPPROTO_IP, IP_OPTIONS, (char *)&opts,
- &optsize) && optsize != 0) {
- for (i = 0; (char *)&opts.ipopt_list[i] - (char *)&opts <
- optsize; ) {
- u_char c = (u_char)opts.ipopt_list[i];
- if (c == IPOPT_LSRR || c == IPOPT_SSRR) {
- close(sock);
- return (FALSE);
- }
- if (c == IPOPT_EOL)
- break;
- i += (c == IPOPT_NOP) ? 1 :
- (u_char)opts.ipopt_list[i+1];
- }
- }
- }
-#endif
-
- /*
- * XXX careful for ftp bounce attacks. If discovered, close the
- * socket and look for another connection.
- */
- if (addr.sin_port == htons(20)) {
- close(sock);
- return (FALSE);
- }
-
- /*
- * make a new transporter (re-uses xprt)
- */
- xprt = makefd_xprt(sock, r->sendsize, r->recvsize);
- xprt->xp_raddr = addr;
- xprt->xp_addrlen = len;
- return (FALSE); /* there is never an rpc msg to be processed */
-}
-
-static enum xprt_stat
-rendezvous_stat()
-{
-
- return (XPRT_IDLE);
-}
-
-static void
-svctcp_destroy(xprt)
- register SVCXPRT *xprt;
-{
- register struct tcp_conn *cd = (struct tcp_conn *)xprt->xp_p1;
-
- xprt_unregister(xprt);
- if (xprt->xp_sock != -1)
- (void)close(xprt->xp_sock);
- xprt->xp_sock = -1;
- 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(xprt, buf, len)
- register SVCXPRT *xprt;
- caddr_t buf;
- register int len;
-{
- register int sock = xprt->xp_sock;
- struct timeval start, delta;
- struct timeval tmp1, tmp2;
- fd_set *fds = NULL;
- int prevbytes = 0, bytes;
- extern int __svc_fdsetsize;
- extern fd_set *__svc_fdset;
-
- delta = wait_per_try;
- gettimeofday(&start, NULL);
- do {
- bytes = howmany(__svc_fdsetsize, NFDBITS) * sizeof(fd_mask);
- if (bytes != prevbytes) {
- if (fds)
- free(fds);
- fds = (fd_set *)malloc(bytes);
- prevbytes = bytes;
- }
- if (fds == NULL)
- goto fatal_err;
- memcpy(fds, __svc_fdset, bytes);
-
- FD_SET(sock, fds);
- switch (select(svc_maxfd+1, fds, NULL, NULL, &delta)) {
- case -1:
- if (errno != EINTR)
- goto fatal_err;
- gettimeofday(&tmp1, NULL);
- timersub(&tmp1, &start, &tmp2);
- timersub(&wait_per_try, &tmp2, &tmp1);
- if (tmp1.tv_sec < 0 || !timerisset(&tmp1))
- goto fatal_err;
- delta = tmp1;
- continue;
- case 0:
- goto fatal_err;
- default:
- if (!FD_ISSET(sock, fds)) {
- svc_getreqset2(fds, svc_maxfd+1);
- gettimeofday(&tmp1, NULL);
- timersub(&tmp1, &start, &tmp2);
- timersub(&wait_per_try, &tmp2, &tmp1);
- if (tmp1.tv_sec < 0 || !timerisset(&tmp1))
- goto fatal_err;
- delta = tmp1;
- continue;
- }
- }
- } while (!FD_ISSET(sock, fds));
- if ((len = read(sock, buf, len)) > 0) {
- if (fds)
- free(fds);
- return (len);
- }
-fatal_err:
- ((struct tcp_conn *)(xprt->xp_p1))->strm_stat = XPRT_DIED;
- if (fds)
- free(fds);
- return (-1);
-}
-
-/*
- * writes data to the tcp connection.
- * Any error is fatal and the connection is closed.
- */
-static int
-writetcp(xprt, buf, len)
- register SVCXPRT *xprt;
- caddr_t buf;
- int len;
-{
- register int i, cnt;
-
- for (cnt = len; cnt > 0; cnt -= i, buf += i) {
- if ((i = write(xprt->xp_sock, buf, cnt)) < 0) {
- ((struct tcp_conn *)(xprt->xp_p1))->strm_stat =
- XPRT_DIED;
- return (-1);
- }
- }
- return (len);
-}
-
-static enum xprt_stat
-svctcp_stat(xprt)
- 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(xprt, msg)
- 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);
- }
- cd->strm_stat = XPRT_DIED; /* XXX */
- return (FALSE);
-}
-
-static bool_t
-svctcp_getargs(xprt, xdr_args, args_ptr)
- SVCXPRT *xprt;
- xdrproc_t xdr_args;
- caddr_t args_ptr;
-{
- return (SVCAUTH_UNWRAP(xprt->xp_auth,
- &(((struct tcp_conn *)(xprt->xp_p1))->xdrs),
- xdr_args, args_ptr));
-}
-
-static bool_t
-svctcp_freeargs(xprt, xdr_args, args_ptr)
- SVCXPRT *xprt;
- xdrproc_t xdr_args;
- caddr_t 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(xprt, msg)
- SVCXPRT *xprt;
- register struct rpc_msg *msg;
-{
- register struct tcp_conn *cd =
- (struct tcp_conn *)(xprt->xp_p1);
- register XDR *xdrs = &(cd->xdrs);
- xdrproc_t xdr_proc;
- caddr_t xdr_where;
-
- xdrs->x_op = XDR_ENCODE;
- msg->rm_xid = cd->x_id;
-
- if (msg->rm_reply.rp_stat == MSG_ACCEPTED &&
- msg->rm_reply.rp_acpt.ar_stat == SUCCESS) {
- xdr_proc = msg->acpted_rply.ar_results.proc;
- xdr_where = msg->acpted_rply.ar_results.where;
- msg->acpted_rply.ar_results.proc = xdr_void;
- msg->acpted_rply.ar_results.where = NULL;
-
- if (!xdr_replymsg(xdrs, msg) ||
- !SVCAUTH_WRAP(xprt->xp_auth, xdrs, xdr_proc, xdr_where))
- return (FALSE);
- }
- else if (!xdr_replymsg(xdrs, msg)) {
- return (FALSE);
- }
- (void)xdrrec_endofrecord(xdrs, TRUE);
-
- return (TRUE);
-}
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