diff options
Diffstat (limited to 'sunrpc/clnt_udp.c')
| -rw-r--r-- | sunrpc/clnt_udp.c | 646 |
1 files changed, 0 insertions, 646 deletions
diff --git a/sunrpc/clnt_udp.c b/sunrpc/clnt_udp.c deleted file mode 100644 index df21e28f64..0000000000 --- a/sunrpc/clnt_udp.c +++ /dev/null @@ -1,646 +0,0 @@ -/* - * clnt_udp.c, Implements a UDP/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. - */ - -#include <stdio.h> -#include <unistd.h> -#include <libintl.h> -#include <rpc/rpc.h> -#include <rpc/xdr.h> -#include <rpc/clnt.h> -#include <sys/poll.h> -#include <sys/socket.h> -#include <sys/ioctl.h> -#include <netdb.h> -#include <errno.h> -#include <stdint.h> -#include <rpc/pmap_clnt.h> -#include <net/if.h> -#include <ifaddrs.h> -#include <wchar.h> -#include <fcntl.h> - -#ifdef IP_RECVERR -#include <errqueue.h> -#include <sys/uio.h> -#endif - -#include <kernel-features.h> -#include <inet/net-internal.h> -#include <shlib-compat.h> - -extern u_long _create_xid (void); - -/* - * UDP bases client side rpc operations - */ -static enum clnt_stat clntudp_call (CLIENT *, u_long, xdrproc_t, caddr_t, - xdrproc_t, caddr_t, struct timeval); -static void clntudp_abort (void); -static void clntudp_geterr (CLIENT *, struct rpc_err *); -static bool_t clntudp_freeres (CLIENT *, xdrproc_t, caddr_t); -static bool_t clntudp_control (CLIENT *, int, char *); -static void clntudp_destroy (CLIENT *); - -static const struct clnt_ops udp_ops = -{ - clntudp_call, - clntudp_abort, - clntudp_geterr, - clntudp_freeres, - clntudp_destroy, - clntudp_control -}; - -/* - * Private data kept per client handle. This private struct is - * unfortunately part of the ABI; ypbind contains a copy of it and - * accesses it through CLIENT::cl_private field. - */ -struct cu_data - { - int cu_sock; - bool_t cu_closeit; - struct sockaddr_in cu_raddr; - int cu_rlen; - struct timeval cu_wait; - struct timeval cu_total; - struct rpc_err cu_error; - XDR cu_outxdrs; - u_int cu_xdrpos; - u_int cu_sendsz; - char *cu_outbuf; - u_int cu_recvsz; - char cu_inbuf[1]; - }; - -/* - * Create a UDP based client handle. - * If *sockp<0, *sockp is set to a newly created UPD socket. - * If raddr->sin_port is 0 a binder on the remote machine - * is consulted for the correct port number. - * NB: It is the clients responsibility to close *sockp. - * NB: The rpch->cl_auth is initialized to null authentication. - * Caller may wish to set this something more useful. - * - * wait is the amount of time used between retransmitting a call if - * no response has been heard; retransmission occurs until the actual - * rpc call times out. - * - * sendsz and recvsz are the maximum allowable packet sizes that can be - * sent and received. - */ -CLIENT * -__libc_clntudp_bufcreate (struct sockaddr_in *raddr, u_long program, - u_long version, struct timeval wait, int *sockp, - u_int sendsz, u_int recvsz, int flags) -{ - CLIENT *cl; - struct cu_data *cu = NULL; - struct rpc_msg call_msg; - - cl = (CLIENT *) mem_alloc (sizeof (CLIENT)); - sendsz = ((sendsz + 3) / 4) * 4; - recvsz = ((recvsz + 3) / 4) * 4; - cu = (struct cu_data *) mem_alloc (sizeof (*cu) + sendsz + recvsz); - if (cl == NULL || cu == NULL) - { - struct rpc_createerr *ce = &get_rpc_createerr (); - (void) __fxprintf (NULL, "%s: %s", - "clntudp_create", _("out of memory\n")); - ce->cf_stat = RPC_SYSTEMERROR; - ce->cf_error.re_errno = ENOMEM; - goto fooy; - } - cu->cu_outbuf = &cu->cu_inbuf[recvsz]; - - if (raddr->sin_port == 0) - { - u_short port; - if ((port = - pmap_getport (raddr, program, version, IPPROTO_UDP)) == 0) - { - goto fooy; - } - raddr->sin_port = htons (port); - } - cl->cl_ops = (struct clnt_ops *) &udp_ops; - cl->cl_private = (caddr_t) cu; - cu->cu_raddr = *raddr; - cu->cu_rlen = sizeof (cu->cu_raddr); - cu->cu_wait = wait; - cu->cu_total.tv_sec = -1; - cu->cu_total.tv_usec = -1; - cu->cu_sendsz = sendsz; - cu->cu_recvsz = recvsz; - 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 = program; - call_msg.rm_call.cb_vers = version; - xdrmem_create (&(cu->cu_outxdrs), cu->cu_outbuf, sendsz, XDR_ENCODE); - if (!xdr_callhdr (&(cu->cu_outxdrs), &call_msg)) - { - goto fooy; - } - cu->cu_xdrpos = XDR_GETPOS (&(cu->cu_outxdrs)); - if (*sockp < 0) - { - *sockp = __socket (AF_INET, SOCK_DGRAM|SOCK_NONBLOCK|flags, IPPROTO_UDP); - if (__glibc_unlikely (*sockp < 0)) - { - struct rpc_createerr *ce = &get_rpc_createerr (); - ce->cf_stat = RPC_SYSTEMERROR; - ce->cf_error.re_errno = errno; - goto fooy; - } - /* attempt to bind to prov port */ - (void) bindresvport (*sockp, (struct sockaddr_in *) 0); -#ifdef IP_RECVERR - { - int on = 1; - __setsockopt (*sockp, SOL_IP, IP_RECVERR, &on, sizeof(on)); - } -#endif - cu->cu_closeit = TRUE; - } - else - { - cu->cu_closeit = FALSE; - } - cu->cu_sock = *sockp; - cl->cl_auth = authnone_create (); - return cl; -fooy: - if (cu) - mem_free ((caddr_t) cu, sizeof (*cu) + sendsz + recvsz); - if (cl) - mem_free ((caddr_t) cl, sizeof (CLIENT)); - return (CLIENT *) NULL; -} -#ifdef EXPORT_RPC_SYMBOLS -libc_hidden_def (__libc_clntudp_bufcreate) -#else -libc_hidden_nolink_sunrpc (__libc_clntudp_bufcreate, GLIBC_PRIVATE) -#endif - -CLIENT * -clntudp_bufcreate (struct sockaddr_in *raddr, u_long program, u_long version, - struct timeval wait, int *sockp, u_int sendsz, - u_int recvsz) -{ - return __libc_clntudp_bufcreate (raddr, program, version, wait, - sockp, sendsz, recvsz, 0); -} -libc_hidden_nolink_sunrpc (clntudp_bufcreate, GLIBC_2_0) - -CLIENT * -clntudp_create (struct sockaddr_in *raddr, u_long program, u_long version, - struct timeval wait, int *sockp) -{ - return __libc_clntudp_bufcreate (raddr, program, version, wait, - sockp, UDPMSGSIZE, UDPMSGSIZE, 0); -} -#ifdef EXPORT_RPC_SYMBOLS -libc_hidden_def (clntudp_create) -#else -libc_hidden_nolink_sunrpc (clntudp_create, GLIBC_2_0) -#endif - -static int -is_network_up (int sock) -{ - struct ifaddrs *ifa; - - if (getifaddrs (&ifa) != 0) - return 0; - - struct ifaddrs *run = ifa; - while (run != NULL) - { - if ((run->ifa_flags & IFF_UP) != 0 - && run->ifa_addr != NULL - && run->ifa_addr->sa_family == AF_INET) - break; - - run = run->ifa_next; - } - - freeifaddrs (ifa); - - return run != NULL; -} - -static enum clnt_stat -clntudp_call (/* client handle */ - CLIENT *cl, - /* procedure number */ - u_long proc, - /* xdr routine for args */ - xdrproc_t xargs, - /* pointer to args */ - caddr_t argsp, - /* xdr routine for results */ - xdrproc_t xresults, - /* pointer to results */ - caddr_t resultsp, - /* seconds to wait before giving up */ - struct timeval utimeout) -{ - struct cu_data *cu = (struct cu_data *) cl->cl_private; - XDR *xdrs; - int outlen = 0; - int inlen; - socklen_t fromlen; - struct pollfd fd; - struct sockaddr_in from; - struct rpc_msg reply_msg; - XDR reply_xdrs; - bool_t ok; - int nrefreshes = 2; /* number of times to refresh cred */ - int anyup; /* any network interface up */ - - struct deadline_current_time current_time = __deadline_current_time (); - struct deadline total_deadline; /* Determined once by overall timeout. */ - struct deadline response_deadline; /* Determined anew for each query. */ - - /* Choose the timeout value. For non-sending usage (xargs == NULL), - the total deadline does not matter, only cu->cu_wait is used - below. */ - if (xargs != NULL) - { - struct timeval tv; - if (cu->cu_total.tv_usec == -1) - /* Use supplied timeout. */ - tv = utimeout; - else - /* Use default timeout. */ - tv = cu->cu_total; - if (!__is_timeval_valid_timeout (tv)) - return (cu->cu_error.re_status = RPC_TIMEDOUT); - total_deadline = __deadline_from_timeval (current_time, tv); - } - - /* Guard against bad timeout specification. */ - if (!__is_timeval_valid_timeout (cu->cu_wait)) - return (cu->cu_error.re_status = RPC_TIMEDOUT); - -call_again: - xdrs = &(cu->cu_outxdrs); - if (xargs == NULL) - goto get_reply; - xdrs->x_op = XDR_ENCODE; - XDR_SETPOS (xdrs, cu->cu_xdrpos); - /* - * the transaction is the first thing in the out buffer - */ - (*(uint32_t *) (cu->cu_outbuf))++; - if ((!XDR_PUTLONG (xdrs, (long *) &proc)) || - (!AUTH_MARSHALL (cl->cl_auth, xdrs)) || - (!(*xargs) (xdrs, argsp))) - return (cu->cu_error.re_status = RPC_CANTENCODEARGS); - outlen = (int) XDR_GETPOS (xdrs); - -send_again: - if (__sendto (cu->cu_sock, cu->cu_outbuf, outlen, 0, - (struct sockaddr *) &(cu->cu_raddr), cu->cu_rlen) - != outlen) - { - cu->cu_error.re_errno = errno; - return (cu->cu_error.re_status = RPC_CANTSEND); - } - - /* sendto may have blocked, so recompute the current time. */ - current_time = __deadline_current_time (); - get_reply: - response_deadline = __deadline_from_timeval (current_time, cu->cu_wait); - - reply_msg.acpted_rply.ar_verf = _null_auth; - reply_msg.acpted_rply.ar_results.where = resultsp; - reply_msg.acpted_rply.ar_results.proc = xresults; - fd.fd = cu->cu_sock; - fd.events = POLLIN; - anyup = 0; - - /* Per-response retry loop. current_time must be up-to-date at the - top of the loop. */ - for (;;) - { - int milliseconds; - if (xargs != NULL) - { - if (__deadline_elapsed (current_time, total_deadline)) - /* Overall timeout expired. */ - return (cu->cu_error.re_status = RPC_TIMEDOUT); - milliseconds = __deadline_to_ms - (current_time, __deadline_first (total_deadline, - response_deadline)); - if (milliseconds == 0) - /* Per-query timeout expired. */ - goto send_again; - } - else - { - /* xatgs == NULL. Collect a response without sending a - query. In this mode, we need to ignore the total - deadline. */ - milliseconds = __deadline_to_ms (current_time, response_deadline); - if (milliseconds == 0) - /* Cannot send again, so bail out. */ - return (cu->cu_error.re_status = RPC_CANTSEND); - } - - switch (__poll (&fd, 1, milliseconds)) - { - - case 0: - if (anyup == 0) - { - anyup = is_network_up (cu->cu_sock); - if (!anyup) - return (cu->cu_error.re_status = RPC_CANTRECV); - } - goto next_response; - case -1: - if (errno == EINTR) - goto next_response; - cu->cu_error.re_errno = errno; - return (cu->cu_error.re_status = RPC_CANTRECV); - } -#ifdef IP_RECVERR - if (fd.revents & POLLERR) - { - struct msghdr msg; - struct cmsghdr *cmsg; - struct sock_extended_err *e; - struct sockaddr_in err_addr; - struct iovec iov; - char *cbuf = malloc (outlen + 256); - int ret; - - if (cbuf == NULL) - { - cu->cu_error.re_errno = errno; - return (cu->cu_error.re_status = RPC_CANTRECV); - } - - iov.iov_base = cbuf + 256; - iov.iov_len = outlen; - msg.msg_name = (void *) &err_addr; - msg.msg_namelen = sizeof (err_addr); - msg.msg_iov = &iov; - msg.msg_iovlen = 1; - msg.msg_flags = 0; - msg.msg_control = cbuf; - msg.msg_controllen = 256; - ret = __recvmsg (cu->cu_sock, &msg, MSG_ERRQUEUE); - if (ret >= 0 - && memcmp (cbuf + 256, cu->cu_outbuf, ret) == 0 - && (msg.msg_flags & MSG_ERRQUEUE) - && ((msg.msg_namelen == 0 - && ret >= 12) - || (msg.msg_namelen == sizeof (err_addr) - && err_addr.sin_family == AF_INET - && memcmp (&err_addr.sin_addr, &cu->cu_raddr.sin_addr, - sizeof (err_addr.sin_addr)) == 0 - && err_addr.sin_port == cu->cu_raddr.sin_port))) - for (cmsg = CMSG_FIRSTHDR (&msg); cmsg; - cmsg = CMSG_NXTHDR (&msg, cmsg)) - if (cmsg->cmsg_level == SOL_IP && cmsg->cmsg_type == IP_RECVERR) - { - e = (struct sock_extended_err *) CMSG_DATA(cmsg); - cu->cu_error.re_errno = e->ee_errno; - free (cbuf); - return (cu->cu_error.re_status = RPC_CANTRECV); - } - free (cbuf); - } -#endif - do - { - fromlen = sizeof (struct sockaddr); - inlen = __recvfrom (cu->cu_sock, cu->cu_inbuf, - (int) cu->cu_recvsz, MSG_DONTWAIT, - (struct sockaddr *) &from, &fromlen); - } - while (inlen < 0 && errno == EINTR); - if (inlen < 0) - { - if (errno == EWOULDBLOCK) - goto next_response; - cu->cu_error.re_errno = errno; - return (cu->cu_error.re_status = RPC_CANTRECV); - } - /* Accept the response if the packet is sufficiently long and - the transaction ID matches the query (if available). */ - if (inlen >= 4 - && (xargs == NULL - || memcmp (cu->cu_inbuf, cu->cu_outbuf, - sizeof (u_int32_t)) == 0)) - break; - - next_response: - /* Update the current time because poll and recvmsg waited for - an unknown time. */ - current_time = __deadline_current_time (); - } - - /* - * now decode and validate the response - */ - xdrmem_create (&reply_xdrs, cu->cu_inbuf, (u_int) inlen, XDR_DECODE); - ok = xdr_replymsg (&reply_xdrs, &reply_msg); - /* XDR_DESTROY(&reply_xdrs); save a few cycles on noop destroy */ - if (ok) - { - _seterr_reply (&reply_msg, &(cu->cu_error)); - if (cu->cu_error.re_status == RPC_SUCCESS) - { - if (!AUTH_VALIDATE (cl->cl_auth, - &reply_msg.acpted_rply.ar_verf)) - { - cu->cu_error.re_status = RPC_AUTHERROR; - cu->cu_error.re_why = AUTH_INVALIDRESP; - } - 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 (nrefreshes > 0 && AUTH_REFRESH (cl->cl_auth)) - { - nrefreshes--; - goto call_again; - } - } /* end of unsuccessful completion */ - } /* end of valid reply message */ - else - { - cu->cu_error.re_status = RPC_CANTDECODERES; - } - return cu->cu_error.re_status; -} - -static void -clntudp_geterr (CLIENT *cl, struct rpc_err *errp) -{ - struct cu_data *cu = (struct cu_data *) cl->cl_private; - - *errp = cu->cu_error; -} - - -static bool_t -clntudp_freeres (CLIENT *cl, xdrproc_t xdr_res, caddr_t res_ptr) -{ - struct cu_data *cu = (struct cu_data *) cl->cl_private; - XDR *xdrs = &(cu->cu_outxdrs); - - xdrs->x_op = XDR_FREE; - return (*xdr_res) (xdrs, res_ptr); -} - -static void -clntudp_abort (void) -{ -} - -static bool_t -clntudp_control (CLIENT *cl, int request, char *info) -{ - struct cu_data *cu = (struct cu_data *) cl->cl_private; - u_long ul; - u_int32_t ui32; - - switch (request) - { - case CLSET_FD_CLOSE: - cu->cu_closeit = TRUE; - break; - case CLSET_FD_NCLOSE: - cu->cu_closeit = FALSE; - break; - case CLSET_TIMEOUT: - cu->cu_total = *(struct timeval *) info; - break; - case CLGET_TIMEOUT: - *(struct timeval *) info = cu->cu_total; - break; - case CLSET_RETRY_TIMEOUT: - cu->cu_wait = *(struct timeval *) info; - break; - case CLGET_RETRY_TIMEOUT: - *(struct timeval *) info = cu->cu_wait; - break; - case CLGET_SERVER_ADDR: - *(struct sockaddr_in *) info = cu->cu_raddr; - break; - case CLGET_FD: - *(int *)info = cu->cu_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, cu->cu_outbuf, 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 (cu->cu_outbuf, &ui32, sizeof (ui32)); - /* decrement by 1 as clntudp_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, cu->cu_outbuf + 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 (cu->cu_outbuf + 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, cu->cu_outbuf + 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 (cu->cu_outbuf + 3 * BYTES_PER_XDR_UNIT, &ui32, sizeof (ui32)); - break; - /* The following are only possible with TI-RPC */ - case CLGET_SVC_ADDR: - case CLSET_SVC_ADDR: - case CLSET_PUSH_TIMOD: - case CLSET_POP_TIMOD: - default: - return FALSE; - } - return TRUE; -} - -static void -clntudp_destroy (CLIENT *cl) -{ - struct cu_data *cu = (struct cu_data *) cl->cl_private; - - if (cu->cu_closeit) - { - (void) __close (cu->cu_sock); - } - XDR_DESTROY (&(cu->cu_outxdrs)); - mem_free ((caddr_t) cu, (sizeof (*cu) + cu->cu_sendsz + cu->cu_recvsz)); - mem_free ((caddr_t) cl, sizeof (CLIENT)); -} |