summaryrefslogtreecommitdiff
path: root/libc/inet/rpc/svc_unix.c
diff options
context:
space:
mode:
Diffstat (limited to 'libc/inet/rpc/svc_unix.c')
-rw-r--r--libc/inet/rpc/svc_unix.c517
1 files changed, 0 insertions, 517 deletions
diff --git a/libc/inet/rpc/svc_unix.c b/libc/inet/rpc/svc_unix.c
deleted file mode 100644
index 8cc982a59..000000000
--- a/libc/inet/rpc/svc_unix.c
+++ /dev/null
@@ -1,517 +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
- */
-
-/*
- * svc_unix.c, Server side for TCP/IP based RPC.
- *
- * Copyright (C) 1984, Sun Microsystems, Inc.
- *
- * Actually implements two flavors of transporter -
- * a unix rendezvouser (a listener and connection establisher)
- * and a record/unix stream.
- */
-
-#include <stdio.h>
-#include <unistd.h>
-#include <string.h>
-#include "rpc_private.h"
-#include <rpc/svc.h>
-#include <sys/socket.h>
-#include <sys/uio.h>
-#include <sys/poll.h>
-#include <errno.h>
-#include <stdlib.h>
-
-/*
- * Ops vector for AF_UNIX based rpc service handle
- */
-static bool_t svcunix_recv (SVCXPRT *, struct rpc_msg *);
-static enum xprt_stat svcunix_stat (SVCXPRT *);
-static bool_t svcunix_getargs (SVCXPRT *, xdrproc_t, caddr_t);
-static bool_t svcunix_reply (SVCXPRT *, struct rpc_msg *);
-static bool_t svcunix_freeargs (SVCXPRT *, xdrproc_t, caddr_t);
-static void svcunix_destroy (SVCXPRT *);
-
-static const struct xp_ops svcunix_op =
-{
- svcunix_recv,
- svcunix_stat,
- svcunix_getargs,
- svcunix_reply,
- svcunix_freeargs,
- svcunix_destroy
-};
-
-/*
- * Ops vector for AF_UNIX rendezvous handler
- */
-static bool_t rendezvous_request (SVCXPRT *, struct rpc_msg *);
-static enum xprt_stat rendezvous_stat (SVCXPRT *);
-static void svcunix_rendezvous_abort (void) attribute_noreturn;
-
-/* This function makes sure abort() relocation goes through PLT
- and thus can be lazy bound. */
-static void
-svcunix_rendezvous_abort (void)
-{
- abort ();
-};
-
-static const struct xp_ops svcunix_rendezvous_op =
-{
- rendezvous_request,
- rendezvous_stat,
- (bool_t (*) (SVCXPRT *, xdrproc_t, caddr_t)) svcunix_rendezvous_abort,
- (bool_t (*) (SVCXPRT *, struct rpc_msg *)) svcunix_rendezvous_abort,
- (bool_t (*) (SVCXPRT *, xdrproc_t, caddr_t)) svcunix_rendezvous_abort,
- svcunix_destroy
-};
-
-static int readunix (char*, char *, int);
-static int writeunix (char *, char *, int);
-static SVCXPRT *makefd_xprt (int, u_int, u_int) internal_function;
-
-struct unix_rendezvous { /* kept in xprt->xp_p1 */
- u_int sendsize;
- u_int recvsize;
-};
-
-struct unix_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 = svcunix_create(sock, send_buf_size, recv_buf_size);
- *
- * Creates, registers, and returns a (rpc) unix 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 svcunix_create
- * binds it to an arbitrary port. The routine then starts a unix
- * 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 unix 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 *
-svcunix_create (int sock, u_int sendsize, u_int recvsize, char *path)
-{
- bool_t madesock = FALSE;
- SVCXPRT *xprt;
- struct unix_rendezvous *r;
- struct sockaddr_un addr;
- socklen_t len = sizeof (struct sockaddr_in);
-
- if (sock == RPC_ANYSOCK)
- {
- if ((sock = socket (AF_UNIX, SOCK_STREAM, 0)) < 0)
- {
- perror ("svc_unix.c - AF_UNIX socket creation problem");
- return (SVCXPRT *) NULL;
- }
- madesock = TRUE;
- }
- memset (&addr, '\0', sizeof (addr));
- addr.sun_family = AF_UNIX;
- len = strlen (path) + 1;
- memcpy (addr.sun_path, path, len);
- len += sizeof (addr.sun_family);
-
- bind (sock, (struct sockaddr *) &addr, len);
-
- if (getsockname (sock, (struct sockaddr *) &addr, &len) != 0
- || listen (sock, 2) != 0)
- {
- perror ("svc_unix.c - cannot getsockname or listen");
- if (madesock)
- close (sock);
- return (SVCXPRT *) NULL;
- }
-
- r = (struct unix_rendezvous *) mem_alloc (sizeof (*r));
- xprt = (SVCXPRT *) mem_alloc (sizeof (SVCXPRT));
- if (r == NULL || xprt == NULL)
- {
- fputs ("svcunix_create: out of memory\n", stderr);
- mem_free (r, sizeof (*r));
- mem_free (xprt, sizeof (SVCXPRT));
- return NULL;
- }
- r->sendsize = sendsize;
- r->recvsize = recvsize;
- xprt->xp_p2 = NULL;
- xprt->xp_p1 = (caddr_t) r;
- xprt->xp_verf = _null_auth;
- xprt->xp_ops = &svcunix_rendezvous_op;
- xprt->xp_port = -1;
- xprt->xp_sock = sock;
- xprt_register (xprt);
- return xprt;
-}
-
-/*
- * Like svunix_create(), except the routine takes any *open* UNIX file
- * descriptor as its first input.
- */
-SVCXPRT *
-svcunixfd_create (int fd, u_int sendsize, u_int recvsize);
-SVCXPRT *
-svcunixfd_create (int fd, u_int sendsize, u_int recvsize)
-{
- return makefd_xprt (fd, sendsize, recvsize);
-}
-
-static SVCXPRT *
-internal_function
-makefd_xprt (int fd, u_int sendsize, u_int recvsize)
-{
- SVCXPRT *xprt;
- struct unix_conn *cd;
-
- xprt = (SVCXPRT *) mem_alloc (sizeof (SVCXPRT));
- cd = (struct unix_conn *) mem_alloc (sizeof (struct unix_conn));
- if (xprt == (SVCXPRT *) NULL || cd == (struct unix_conn *) NULL)
- {
- (void) fputs ("svc_unix: makefd_xprt: out of memory\n", stderr);
- mem_free (xprt, sizeof (SVCXPRT));
- mem_free (cd, sizeof (struct unix_conn));
- return NULL;
- }
- cd->strm_stat = XPRT_IDLE;
- xdrrec_create (&(cd->xdrs), sendsize, recvsize,
- (caddr_t) xprt, readunix, writeunix);
- xprt->xp_p2 = NULL;
- xprt->xp_p1 = (caddr_t) cd;
- xprt->xp_verf.oa_base = cd->verf_body;
- xprt->xp_addrlen = 0;
- xprt->xp_ops = &svcunix_op; /* truly deals with calls */
- xprt->xp_port = 0; /* this is a connection, not a rendezvouser */
- xprt->xp_sock = fd;
- xprt_register (xprt);
- return xprt;
-}
-
-static bool_t
-rendezvous_request (SVCXPRT *xprt, struct rpc_msg *errmsg attribute_unused)
-{
- int sock;
- struct unix_rendezvous *r;
- struct sockaddr_un addr;
- struct sockaddr_in in_addr;
- socklen_t len;
-
- r = (struct unix_rendezvous *) xprt->xp_p1;
-again:
- len = sizeof (struct sockaddr_un);
- if ((sock = accept (xprt->xp_sock, (struct sockaddr *) &addr, &len)) < 0)
- {
- if (errno == EINTR)
- goto again;
- return FALSE;
- }
- /*
- * make a new transporter (re-uses xprt)
- */
- memset (&in_addr, '\0', sizeof (in_addr));
- in_addr.sin_family = AF_UNIX;
- xprt = makefd_xprt (sock, r->sendsize, r->recvsize);
- memcpy (&xprt->xp_raddr, &in_addr, sizeof (in_addr));
- xprt->xp_addrlen = len;
- return FALSE; /* there is never an rpc msg to be processed */
-}
-
-static enum xprt_stat
-rendezvous_stat (SVCXPRT *xprt attribute_unused)
-{
- return XPRT_IDLE;
-}
-
-static void
-svcunix_destroy (SVCXPRT *xprt)
-{
- struct unix_conn *cd = (struct unix_conn *) xprt->xp_p1;
-
- xprt_unregister (xprt);
- close (xprt->xp_sock);
- if (xprt->xp_port != 0)
- {
- /* a rendezvouser socket */
- xprt->xp_port = 0;
- }
- else
- {
- /* an actual connection socket */
- XDR_DESTROY (&(cd->xdrs));
- }
- mem_free ((caddr_t) cd, sizeof (struct unix_conn));
- mem_free ((caddr_t) xprt, sizeof (SVCXPRT));
-}
-
-#ifdef SCM_CREDENTIALS
-struct cmessage {
- struct cmsghdr cmsg;
- struct ucred cmcred;
- /* hack to make sure we have enough memory */
- char dummy[(CMSG_ALIGN (sizeof (struct ucred)) - sizeof (struct ucred) + sizeof (long))];
-};
-
-/* XXX This is not thread safe, but since the main functions in svc.c
- and the rpcgen generated *_svc functions for the daemon are also not
- thread safe and uses static global variables, it doesn't matter. */
-static struct cmessage cm;
-#endif
-
-static int
-__msgread (int sock, void *data, size_t cnt)
-{
- struct iovec iov;
- struct msghdr msg;
- int len;
-
- iov.iov_base = data;
- iov.iov_len = cnt;
-
- msg.msg_iov = &iov;
- msg.msg_iovlen = 1;
- msg.msg_name = NULL;
- msg.msg_namelen = 0;
-#ifdef SCM_CREDENTIALS
- msg.msg_control = (caddr_t) &cm;
- msg.msg_controllen = sizeof (struct cmessage);
-#endif
- msg.msg_flags = 0;
-
-#ifdef SO_PASSCRED
- {
- int on = 1;
- if (setsockopt (sock, SOL_SOCKET, SO_PASSCRED, &on, sizeof (on)))
- return -1;
- }
-#endif
-
- restart:
- len = recvmsg (sock, &msg, 0);
- if (len >= 0)
- {
- if (msg.msg_flags & MSG_CTRUNC || len == 0)
- return 0;
- else
- return len;
- }
- if (errno == EINTR)
- goto restart;
- return -1;
-}
-
-static int
-__msgwrite (int sock, void *data, size_t cnt)
-{
-#ifndef SCM_CREDENTIALS
- /* We cannot implement this reliably. */
- __set_errno (ENOSYS);
- return -1;
-#else
- struct iovec iov;
- struct msghdr msg;
- struct cmsghdr *cmsg = &cm.cmsg;
- struct ucred cred;
- int len;
-
- /* XXX I'm not sure, if gete?id() is always correct, or if we should use
- get?id(). But since keyserv needs geteuid(), we have no other chance.
- It would be much better, if the kernel could pass both to the server. */
- cred.pid = getpid ();
- cred.uid = geteuid ();
- cred.gid = getegid ();
-
- memcpy (CMSG_DATA(cmsg), &cred, sizeof (struct ucred));
- cmsg->cmsg_level = SOL_SOCKET;
- cmsg->cmsg_type = SCM_CREDENTIALS;
- cmsg->cmsg_len = sizeof(*cmsg) + sizeof(struct ucred);
-
- iov.iov_base = data;
- iov.iov_len = cnt;
-
- msg.msg_iov = &iov;
- msg.msg_iovlen = 1;
- msg.msg_name = NULL;
- msg.msg_namelen = 0;
- msg.msg_control = cmsg;
- msg.msg_controllen = CMSG_ALIGN(cmsg->cmsg_len);
- msg.msg_flags = 0;
-
- restart:
- len = sendmsg (sock, &msg, 0);
- if (len >= 0)
- return len;
- if (errno == EINTR)
- goto restart;
- return -1;
-
-#endif
-}
-
-/*
- * reads data from the unix connection.
- * any error is fatal and the connection is closed.
- * (And a read of zero bytes is a half closed stream => error.)
- */
-static int
-readunix (char *xprtptr, char *buf, int len)
-{
- SVCXPRT *xprt = (SVCXPRT *) xprtptr;
- int sock = xprt->xp_sock;
- int milliseconds = 35 * 1000;
- struct pollfd pollfd;
-
- do
- {
- pollfd.fd = sock;
- pollfd.events = POLLIN;
- switch (poll (&pollfd, 1, milliseconds))
- {
- case -1:
- if (errno == EINTR)
- continue;
- /*FALLTHROUGH*/
- case 0:
- goto fatal_err;
- default:
- if ((pollfd.revents & POLLERR) || (pollfd.revents & POLLHUP)
- || (pollfd.revents & POLLNVAL))
- goto fatal_err;
- break;
- }
- }
- while ((pollfd.revents & POLLIN) == 0);
-
- if ((len = __msgread (sock, buf, len)) > 0)
- return len;
-
- fatal_err:
- ((struct unix_conn *) (xprt->xp_p1))->strm_stat = XPRT_DIED;
- return -1;
-}
-
-/*
- * writes data to the unix connection.
- * Any error is fatal and the connection is closed.
- */
-static int
-writeunix (char *xprtptr, char * buf, int len)
-{
- SVCXPRT *xprt = (SVCXPRT *) xprtptr;
- int i, cnt;
-
- for (cnt = len; cnt > 0; cnt -= i, buf += i)
- {
- if ((i = __msgwrite (xprt->xp_sock, buf, cnt)) < 0)
- {
- ((struct unix_conn *) (xprt->xp_p1))->strm_stat = XPRT_DIED;
- return -1;
- }
- }
- return len;
-}
-
-static enum xprt_stat
-svcunix_stat (SVCXPRT *xprt)
-{
- struct unix_conn *cd =
- (struct unix_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
-svcunix_recv (SVCXPRT *xprt, struct rpc_msg *msg)
-{
- struct unix_conn *cd = (struct unix_conn *) (xprt->xp_p1);
- XDR *xdrs = &(cd->xdrs);
-
- xdrs->x_op = XDR_DECODE;
- xdrrec_skiprecord (xdrs);
- if (xdr_callmsg (xdrs, msg))
- {
- cd->x_id = msg->rm_xid;
- /* set up verifiers */
-#ifdef SCM_CREDENTIALS
- msg->rm_call.cb_verf.oa_flavor = AUTH_UNIX;
- msg->rm_call.cb_verf.oa_base = (caddr_t) &cm;
- msg->rm_call.cb_verf.oa_length = sizeof (cm);
-#endif
- return TRUE;
- }
- cd->strm_stat = XPRT_DIED; /* XXXX */
- return FALSE;
-}
-
-static bool_t
-svcunix_getargs (SVCXPRT *xprt, xdrproc_t xdr_args, caddr_t args_ptr)
-{
- return (*xdr_args) (&(((struct unix_conn *) (xprt->xp_p1))->xdrs),
- args_ptr);
-}
-
-static bool_t
-svcunix_freeargs (SVCXPRT *xprt, xdrproc_t xdr_args, caddr_t args_ptr)
-{
- XDR *xdrs = &(((struct unix_conn *) (xprt->xp_p1))->xdrs);
-
- xdrs->x_op = XDR_FREE;
- return (*xdr_args) (xdrs, args_ptr);
-}
-
-static bool_t
-svcunix_reply (SVCXPRT *xprt, struct rpc_msg *msg)
-{
- struct unix_conn *cd = (struct unix_conn *) (xprt->xp_p1);
- XDR *xdrs = &(cd->xdrs);
- bool_t stat;
-
- xdrs->x_op = XDR_ENCODE;
- msg->rm_xid = cd->x_id;
- stat = xdr_replymsg (xdrs, msg);
- (void) xdrrec_endofrecord (xdrs, TRUE);
- return stat;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-16 15:03:53 +0000