X-Git-Url: https://git.decadent.org.uk/gitweb/?p=nfs-utils.git;a=blobdiff_plain;f=support%2Frpc%2Fsvc_tcp.c;fp=support%2Frpc%2Fsvc_tcp.c;h=0000000000000000000000000000000000000000;hp=6e6f785129d260455a5d216b0d817ab816442af6;hb=a1b7c0da9e73a607f4bc70ffe3b44b00f5d39938;hpb=1d0397894463e507e9f5d92442ac3b09e29310a3 diff --git a/support/rpc/svc_tcp.c b/support/rpc/svc_tcp.c deleted file mode 100644 index 6e6f785..0000000 --- a/support/rpc/svc_tcp.c +++ /dev/null @@ -1,528 +0,0 @@ -/* - * 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 -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include -#ifndef __linux__ -#include -#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); -}