diff options
Diffstat (limited to 'sunrpc/clnt_tcp.c')
| -rw-r--r-- | sunrpc/clnt_tcp.c | 530 |
1 files changed, 0 insertions, 530 deletions
diff --git a/sunrpc/clnt_tcp.c b/sunrpc/clnt_tcp.c deleted file mode 100644 index e311b35a25..0000000000 --- a/sunrpc/clnt_tcp.c +++ /dev/null @@ -1,530 +0,0 @@ -/* - * clnt_tcp.c, Implements a TCP/IP based, client side RPC. - * - * Copyright (c) 2010, Oracle America, Inc. - * - * 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. - * - * TCP based RPC supports 'batched calls'. - * A sequence of calls may be batched-up in a send buffer. The rpc call - * return immediately to the client even though the call was not necessarily - * sent. The batching occurs if the results' xdr routine is NULL (0) AND - * the rpc timeout value is zero (see clnt.h, rpc). - * - * Clients should NOT casually batch calls that in fact return results; that is, - * the server side should be aware that a call is batched and not produce any - * return message. Batched calls that produce many result messages can - * deadlock (netlock) the client and the server.... - * - * Now go hang yourself. - */ - -#include <netdb.h> -#include <errno.h> -#include <stdio.h> -#include <unistd.h> -#include <libintl.h> -#include <rpc/rpc.h> -#include <sys/poll.h> -#include <sys/socket.h> -#include <rpc/pmap_clnt.h> -#include <wchar.h> -#include <shlib-compat.h> - -extern u_long _create_xid (void); - -#define MCALL_MSG_SIZE 24 - -struct ct_data - { - int ct_sock; - bool_t ct_closeit; - struct timeval ct_wait; - bool_t ct_waitset; /* wait set by clnt_control? */ - struct sockaddr_in ct_addr; - struct rpc_err ct_error; - char ct_mcall[MCALL_MSG_SIZE]; /* marshalled callmsg */ - u_int ct_mpos; /* pos after marshal */ - XDR ct_xdrs; - }; - -static int readtcp (char *, char *, int); -static int writetcp (char *, char *, int); - -static enum clnt_stat clnttcp_call (CLIENT *, u_long, xdrproc_t, caddr_t, - xdrproc_t, caddr_t, struct timeval); -static void clnttcp_abort (void); -static void clnttcp_geterr (CLIENT *, struct rpc_err *); -static bool_t clnttcp_freeres (CLIENT *, xdrproc_t, caddr_t); -static bool_t clnttcp_control (CLIENT *, int, char *); -static void clnttcp_destroy (CLIENT *); - -static const struct clnt_ops tcp_ops = -{ - clnttcp_call, - clnttcp_abort, - clnttcp_geterr, - clnttcp_freeres, - clnttcp_destroy, - clnttcp_control -}; - -/* - * Create a client handle for a tcp/ip connection. - * If *sockp<0, *sockp is set to a newly created TCP socket and it is - * connected to raddr. If *sockp non-negative then - * raddr is ignored. The rpc/tcp package does buffering - * similar to stdio, so the client must pick send and receive buffer sizes,]; - * 0 => use the default. - * If raddr->sin_port is 0, then a binder on the remote machine is - * consulted for the right port number. - * NB: *sockp is copied into a private area. - * NB: It is the clients responsibility to close *sockp. - * NB: The rpch->cl_auth is set null authentication. Caller may wish to set this - * something more useful. - */ -CLIENT * -clnttcp_create (struct sockaddr_in *raddr, u_long prog, u_long vers, - int *sockp, u_int sendsz, u_int recvsz) -{ - CLIENT *h; - struct ct_data *ct; - struct rpc_msg call_msg; - - h = (CLIENT *) mem_alloc (sizeof (*h)); - ct = (struct ct_data *) mem_alloc (sizeof (*ct)); - if (h == NULL || ct == NULL) - { - struct rpc_createerr *ce = &get_rpc_createerr (); - (void) __fxprintf (NULL, "%s: %s", __func__, _("out of memory\n")); - ce->cf_stat = RPC_SYSTEMERROR; - ce->cf_error.re_errno = ENOMEM; - goto fooy; - } - - /* - * If no port number given ask the pmap for one - */ - if (raddr->sin_port == 0) - { - u_short port; - if ((port = pmap_getport (raddr, prog, vers, IPPROTO_TCP)) == 0) - { - mem_free ((caddr_t) ct, sizeof (struct ct_data)); - mem_free ((caddr_t) h, sizeof (CLIENT)); - return ((CLIENT *) NULL); - } - raddr->sin_port = htons (port); - } - - /* - * If no socket given, open one - */ - if (*sockp < 0) - { - *sockp = __socket (AF_INET, SOCK_STREAM, IPPROTO_TCP); - (void) bindresvport (*sockp, (struct sockaddr_in *) 0); - if ((*sockp < 0) - || (__connect (*sockp, (struct sockaddr *) raddr, - sizeof (*raddr)) < 0)) - { - struct rpc_createerr *ce = &get_rpc_createerr (); - ce->cf_stat = RPC_SYSTEMERROR; - ce->cf_error.re_errno = errno; - if (*sockp >= 0) - (void) __close (*sockp); - goto fooy; - } - ct->ct_closeit = TRUE; - } - else - { - ct->ct_closeit = FALSE; - } - - /* - * Set up private data struct - */ - ct->ct_sock = *sockp; - ct->ct_wait.tv_usec = 0; - ct->ct_waitset = FALSE; - ct->ct_addr = *raddr; - - /* - * Initialize call message - */ - call_msg.rm_xid = _create_xid (); - call_msg.rm_direction = CALL; - call_msg.rm_call.cb_rpcvers = RPC_MSG_VERSION; - call_msg.rm_call.cb_prog = prog; - call_msg.rm_call.cb_vers = vers; - - /* - * pre-serialize the static part of the call msg and stash it away - */ - xdrmem_create (&(ct->ct_xdrs), ct->ct_mcall, MCALL_MSG_SIZE, XDR_ENCODE); - if (!xdr_callhdr (&(ct->ct_xdrs), &call_msg)) - { - if (ct->ct_closeit) - { - (void) __close (*sockp); - } - goto fooy; - } - ct->ct_mpos = XDR_GETPOS (&(ct->ct_xdrs)); - XDR_DESTROY (&(ct->ct_xdrs)); - - /* - * Create a client handle which uses xdrrec for serialization - * and authnone for authentication. - */ - xdrrec_create (&(ct->ct_xdrs), sendsz, recvsz, - (caddr_t) ct, readtcp, writetcp); - h->cl_ops = (struct clnt_ops *) &tcp_ops; - h->cl_private = (caddr_t) ct; - h->cl_auth = authnone_create (); - return h; - -fooy: - /* - * Something goofed, free stuff and barf - */ - mem_free ((caddr_t) ct, sizeof (struct ct_data)); - mem_free ((caddr_t) h, sizeof (CLIENT)); - return ((CLIENT *) NULL); -} -#ifdef EXPORT_RPC_SYMBOLS -libc_hidden_def (clnttcp_create) -#else -libc_hidden_nolink_sunrpc (clnttcp_create, GLIBC_2_0) -#endif - -static enum clnt_stat -clnttcp_call (CLIENT *h, u_long proc, xdrproc_t xdr_args, caddr_t args_ptr, - xdrproc_t xdr_results, caddr_t results_ptr, - struct timeval timeout) -{ - struct ct_data *ct = (struct ct_data *) h->cl_private; - XDR *xdrs = &(ct->ct_xdrs); - struct rpc_msg reply_msg; - u_long x_id; - u_int32_t *msg_x_id = (u_int32_t *) (ct->ct_mcall); /* yuk */ - bool_t shipnow; - int refreshes = 2; - - if (!ct->ct_waitset) - { - ct->ct_wait = timeout; - } - - shipnow = - (xdr_results == (xdrproc_t) 0 && ct->ct_wait.tv_sec == 0 - && ct->ct_wait.tv_usec == 0) ? FALSE : TRUE; - -call_again: - xdrs->x_op = XDR_ENCODE; - ct->ct_error.re_status = RPC_SUCCESS; - x_id = ntohl (--(*msg_x_id)); - if ((!XDR_PUTBYTES (xdrs, ct->ct_mcall, ct->ct_mpos)) || - (!XDR_PUTLONG (xdrs, (long *) &proc)) || - (!AUTH_MARSHALL (h->cl_auth, xdrs)) || - (!(*xdr_args) (xdrs, args_ptr))) - { - if (ct->ct_error.re_status == RPC_SUCCESS) - ct->ct_error.re_status = RPC_CANTENCODEARGS; - (void) xdrrec_endofrecord (xdrs, TRUE); - return (ct->ct_error.re_status); - } - if (!xdrrec_endofrecord (xdrs, shipnow)) - return ct->ct_error.re_status = RPC_CANTSEND; - if (!shipnow) - return RPC_SUCCESS; - /* - * Hack to provide rpc-based message passing - */ - if (ct->ct_wait.tv_sec == 0 && ct->ct_wait.tv_usec == 0) - { - return ct->ct_error.re_status = RPC_TIMEDOUT; - } - - - /* - * Keep receiving until we get a valid transaction id - */ - xdrs->x_op = XDR_DECODE; - while (TRUE) - { - reply_msg.acpted_rply.ar_verf = _null_auth; - reply_msg.acpted_rply.ar_results.where = NULL; - reply_msg.acpted_rply.ar_results.proc = (xdrproc_t)xdr_void; - if (!xdrrec_skiprecord (xdrs)) - return (ct->ct_error.re_status); - /* now decode and validate the response header */ - if (!xdr_replymsg (xdrs, &reply_msg)) - { - if (ct->ct_error.re_status == RPC_SUCCESS) - continue; - return ct->ct_error.re_status; - } - if ((u_int32_t) reply_msg.rm_xid == (u_int32_t) x_id) - break; - } - - /* - * process header - */ - _seterr_reply (&reply_msg, &(ct->ct_error)); - if (ct->ct_error.re_status == RPC_SUCCESS) - { - if (!AUTH_VALIDATE (h->cl_auth, &reply_msg.acpted_rply.ar_verf)) - { - ct->ct_error.re_status = RPC_AUTHERROR; - ct->ct_error.re_why = AUTH_INVALIDRESP; - } - else if (!(*xdr_results) (xdrs, results_ptr)) - { - if (ct->ct_error.re_status == RPC_SUCCESS) - ct->ct_error.re_status = RPC_CANTDECODERES; - } - /* free verifier ... */ - if (reply_msg.acpted_rply.ar_verf.oa_base != NULL) - { - xdrs->x_op = XDR_FREE; - (void) xdr_opaque_auth (xdrs, &(reply_msg.acpted_rply.ar_verf)); - } - } /* end successful completion */ - else - { - /* maybe our credentials need to be refreshed ... */ - if (refreshes-- && AUTH_REFRESH (h->cl_auth)) - goto call_again; - } /* end of unsuccessful completion */ - return ct->ct_error.re_status; -} - -static void -clnttcp_geterr (CLIENT *h, struct rpc_err *errp) -{ - struct ct_data *ct = - (struct ct_data *) h->cl_private; - - *errp = ct->ct_error; -} - -static bool_t -clnttcp_freeres (CLIENT *cl, xdrproc_t xdr_res, caddr_t res_ptr) -{ - struct ct_data *ct = (struct ct_data *) cl->cl_private; - XDR *xdrs = &(ct->ct_xdrs); - - xdrs->x_op = XDR_FREE; - return (*xdr_res) (xdrs, res_ptr); -} - -static void -clnttcp_abort (void) -{ -} - -static bool_t -clnttcp_control (CLIENT *cl, int request, char *info) -{ - struct ct_data *ct = (struct ct_data *) cl->cl_private; - u_long ul; - u_int32_t ui32; - - - switch (request) - { - case CLSET_FD_CLOSE: - ct->ct_closeit = TRUE; - break; - case CLSET_FD_NCLOSE: - ct->ct_closeit = FALSE; - break; - case CLSET_TIMEOUT: - ct->ct_wait = *(struct timeval *) info; - ct->ct_waitset = TRUE; - break; - case CLGET_TIMEOUT: - *(struct timeval *) info = ct->ct_wait; - break; - case CLGET_SERVER_ADDR: - *(struct sockaddr_in *) info = ct->ct_addr; - break; - case CLGET_FD: - *(int *)info = ct->ct_sock; - break; - case CLGET_XID: - /* - * use the knowledge that xid is the - * first element in the call structure *. - * This will get the xid of the PREVIOUS call - */ - memcpy (&ui32, ct->ct_mcall, sizeof (ui32)); - ul = ntohl (ui32); - memcpy (info, &ul, sizeof (ul)); - break; - case CLSET_XID: - /* This will set the xid of the NEXT call */ - memcpy (&ul, info, sizeof (ul)); - ui32 = htonl (ul - 1); - memcpy (ct->ct_mcall, &ui32, sizeof (ui32)); - /* decrement by 1 as clnttcp_call() increments once */ - break; - case CLGET_VERS: - /* - * This RELIES on the information that, in the call body, - * the version number field is the fifth field from the - * beginning of the RPC header. MUST be changed if the - * call_struct is changed - */ - memcpy (&ui32, ct->ct_mcall + 4 * BYTES_PER_XDR_UNIT, sizeof (ui32)); - ul = ntohl (ui32); - memcpy (info, &ul, sizeof (ul)); - break; - case CLSET_VERS: - memcpy (&ul, info, sizeof (ul)); - ui32 = htonl (ul); - memcpy (ct->ct_mcall + 4 * BYTES_PER_XDR_UNIT, &ui32, sizeof (ui32)); - break; - case CLGET_PROG: - /* - * This RELIES on the information that, in the call body, - * the program number field is the field from the - * beginning of the RPC header. MUST be changed if the - * call_struct is changed - */ - memcpy (&ui32, ct->ct_mcall + 3 * BYTES_PER_XDR_UNIT, sizeof (ui32)); - ul = ntohl (ui32); - memcpy (info, &ul, sizeof (ul)); - break; - case CLSET_PROG: - memcpy (&ul, info, sizeof (ul)); - ui32 = htonl (ul); - memcpy (ct->ct_mcall + 3 * BYTES_PER_XDR_UNIT, &ui32, sizeof (ui32)); - break; - /* The following are only possible with TI-RPC */ - case CLGET_RETRY_TIMEOUT: - case CLSET_RETRY_TIMEOUT: - case CLGET_SVC_ADDR: - case CLSET_SVC_ADDR: - case CLSET_PUSH_TIMOD: - case CLSET_POP_TIMOD: - default: - return FALSE; - } - return TRUE; -} - - -static void -clnttcp_destroy (CLIENT *h) -{ - struct ct_data *ct = - (struct ct_data *) h->cl_private; - - if (ct->ct_closeit) - { - (void) __close (ct->ct_sock); - } - XDR_DESTROY (&(ct->ct_xdrs)); - mem_free ((caddr_t) ct, sizeof (struct ct_data)); - mem_free ((caddr_t) h, sizeof (CLIENT)); -} - -/* - * Interface between xdr serializer and tcp connection. - * Behaves like the system calls, read & write, but keeps some error state - * around for the rpc level. - */ -static int -readtcp (char *ctptr, char *buf, int len) -{ - struct ct_data *ct = (struct ct_data *)ctptr; - struct pollfd fd; - int milliseconds = (ct->ct_wait.tv_sec * 1000) + - (ct->ct_wait.tv_usec / 1000); - - if (len == 0) - return 0; - - fd.fd = ct->ct_sock; - fd.events = POLLIN; - while (TRUE) - { - switch (__poll(&fd, 1, milliseconds)) - { - case 0: - ct->ct_error.re_status = RPC_TIMEDOUT; - return -1; - - case -1: - if (errno == EINTR) - continue; - ct->ct_error.re_status = RPC_CANTRECV; - ct->ct_error.re_errno = errno; - return -1; - } - break; - } - switch (len = __read (ct->ct_sock, buf, len)) - { - - case 0: - /* premature eof */ - ct->ct_error.re_errno = ECONNRESET; - ct->ct_error.re_status = RPC_CANTRECV; - len = -1; /* it's really an error */ - break; - - case -1: - ct->ct_error.re_errno = errno; - ct->ct_error.re_status = RPC_CANTRECV; - break; - } - return len; -} - -static int -writetcp (char *ctptr, char *buf, int len) -{ - int i, cnt; - struct ct_data *ct = (struct ct_data*)ctptr; - - for (cnt = len; cnt > 0; cnt -= i, buf += i) - { - if ((i = __write (ct->ct_sock, buf, cnt)) == -1) - { - ct->ct_error.re_errno = errno; - ct->ct_error.re_status = RPC_CANTSEND; - return -1; - } - } - return len; -} |