diff options
Diffstat (limited to 'libc/inet/rpc/svc_tcp.c')
-rw-r--r-- | libc/inet/rpc/svc_tcp.c | 582 |
1 files changed, 301 insertions, 281 deletions
diff --git a/libc/inet/rpc/svc_tcp.c b/libc/inet/rpc/svc_tcp.c index 9adc11526..a2982796b 100644 --- a/libc/inet/rpc/svc_tcp.c +++ b/libc/inet/rpc/svc_tcp.c @@ -6,100 +6,126 @@ * 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 */ -#define __FORCE_GLIBC -#include <features.h> +#if !defined(lint) && defined(SCCSIDS) +static char sccsid[] = "@(#)svc_tcp.c 1.21 87/08/11 Copyr 1984 Sun Micro"; +#endif /* - * svc_tcp.c, Server side for TCP/IP based RPC. + * 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) + * a tcp rendezvouser (a listener and connection establisher) * and a record/tcp stream. */ -#include <stdlib.h> +#define __FORCE_GLIBC +#define _GNU_SOURCE +#include <features.h> + #include <stdio.h> +#include <unistd.h> +#include <string.h> #include <rpc/rpc.h> #include <sys/socket.h> +#include <sys/poll.h> #include <errno.h> -#include <unistd.h> +#include <stdlib.h> + +#ifdef USE_IN_LIBIO +# include <wchar.h> +# include <libio/iolibio.h> +# define fputs(s, f) _IO_fputs (s, f) +#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 +static bool_t svctcp_recv (SVCXPRT *, struct rpc_msg *); +static enum xprt_stat svctcp_stat (SVCXPRT *); +static bool_t svctcp_getargs (SVCXPRT *, xdrproc_t, caddr_t); +static bool_t svctcp_reply (SVCXPRT *, struct rpc_msg *); +static bool_t svctcp_freeargs (SVCXPRT *, xdrproc_t, caddr_t); +static void svctcp_destroy (SVCXPRT *); + +static const 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(); - -#warning Expect 3 warnings for initialization from incompatible pointer type -static struct xp_ops svctcp_rendezvous_op = { - rendezvous_request, - rendezvous_stat, - abort, - abort, - abort, - svctcp_destroy +static bool_t rendezvous_request (SVCXPRT *, struct rpc_msg *); +static enum xprt_stat rendezvous_stat (SVCXPRT *); +static void svctcp_rendezvous_abort (void); + +/* This function makes sure abort() relocation goes through PLT + and thus can be lazy bound. */ +static void +svctcp_rendezvous_abort (void) +{ + abort (); }; -static int readtcp(), writetcp(); -static SVCXPRT *makefd_xprt(); - -struct tcp_rendezvous { /* kept in xprt->xp_p1 */ - u_int sendsize; - u_int recvsize; +static const struct xp_ops svctcp_rendezvous_op = +{ + rendezvous_request, + rendezvous_stat, + (bool_t (*) (SVCXPRT *, xdrproc_t, caddr_t)) svctcp_rendezvous_abort, + (bool_t (*) (SVCXPRT *, struct rpc_msg *)) svctcp_rendezvous_abort, + (bool_t (*) (SVCXPRT *, xdrproc_t, caddr_t)) svctcp_rendezvous_abort, + svctcp_destroy }; -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]; -}; +static int readtcp (char*, char *, int); +static int writetcp (char *, char *, int); +static SVCXPRT *makefd_xprt (int, u_int, u_int) internal_function; + +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); + * 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 @@ -117,290 +143,284 @@ struct tcp_conn { /* kept in xprt->xp_p1 */ * 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; +SVCXPRT * +svctcp_create (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("svc_tcp.c - tcp socket creation problem"); - return ((SVCXPRT *) NULL); - } - madesock = TRUE; + bool_t madesock = FALSE; + SVCXPRT *xprt; + struct tcp_rendezvous *r; + struct sockaddr_in addr; + socklen_t len = sizeof (struct sockaddr_in); + + if (sock == RPC_ANYSOCK) + { + if ((sock = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) + { + perror (_("svc_tcp.c - tcp socket creation problem")); + return (SVCXPRT *) NULL; } - bzero((char *) &addr, sizeof(addr)); - 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"); - 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"); - return (NULL); - } - xprt->xp_p2 = NULL; - xprt->xp_p1 = (caddr_t) r; - 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); + madesock = TRUE; + } + bzero ((char *) &addr, sizeof (addr)); + 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 (_("svc_tcp.c - cannot getsockname or listen")); + if (madesock) + (void) close (sock); + return (SVCXPRT *) NULL; + } + r = (struct tcp_rendezvous *) mem_alloc (sizeof (*r)); + xprt = (SVCXPRT *) mem_alloc (sizeof (SVCXPRT)); + if (r == NULL || xprt == NULL) + { +#ifdef USE_IN_LIBIO + if (_IO_fwide (stderr, 0) > 0) + (void) __fwprintf (stderr, L"%s", _("svctcp_create: out of memory\n")); + else +#endif + (void) fputs (_("svctcp_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 = &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; +SVCXPRT * +svcfd_create (int fd, u_int sendsize, u_int recvsize) { - - return (makefd_xprt(fd, sendsize, recvsize)); + return makefd_xprt (fd, sendsize, recvsize); } -static SVCXPRT *makefd_xprt(fd, sendsize, recvsize) -int fd; -u_int sendsize; -u_int recvsize; +static SVCXPRT * +internal_function +makefd_xprt (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_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); + SVCXPRT *xprt; + struct tcp_conn *cd; + + xprt = (SVCXPRT *) mem_alloc (sizeof (SVCXPRT)); + cd = (struct tcp_conn *) mem_alloc (sizeof (struct tcp_conn)); + if (xprt == (SVCXPRT *) NULL || cd == NULL) + { +#ifdef USE_IN_LIBIO + if (_IO_fwide (stderr, 0) > 0) + (void) __fwprintf (stderr, L"%s", + _("svc_tcp: makefd_xprt: out of memory\n")); + else +#endif + (void) fputs (_("svc_tcp: makefd_xprt: out of memory\n"), stderr); + mem_free (xprt, sizeof (SVCXPRT)); + mem_free (cd, sizeof (struct tcp_conn)); + return NULL; + } + 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_verf.oa_base = cd->verf_body; + xprt->xp_addrlen = 0; + xprt->xp_ops = &svctcp_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(xprt) -register SVCXPRT *xprt; +static bool_t +rendezvous_request (SVCXPRT *xprt, struct rpc_msg *errmsg) { - 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); - } - /* - * 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 */ + int sock; + struct tcp_rendezvous *r; + struct sockaddr_in addr; + socklen_t 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; + } + /* + * make a new transporter (re-uses xprt) + */ + xprt = makefd_xprt (sock, r->sendsize, r->recvsize); + memcpy (&xprt->xp_raddr, &addr, sizeof (addr)); + xprt->xp_addrlen = len; + return FALSE; /* there is never an rpc msg to be processed */ } -static enum xprt_stat rendezvous_stat() +static enum xprt_stat +rendezvous_stat (SVCXPRT *xprt) { - - return (XPRT_IDLE); + return XPRT_IDLE; } -static void svctcp_destroy(xprt) -register SVCXPRT *xprt; +static void +svctcp_destroy (SVCXPRT *xprt) { - register struct tcp_conn *cd = (struct tcp_conn *) xprt->xp_p1; - - xprt_unregister(xprt); - (void) 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 tcp_conn)); - - mem_free((caddr_t) xprt, sizeof(SVCXPRT)); + struct tcp_conn *cd = (struct tcp_conn *) xprt->xp_p1; + + xprt_unregister (xprt); + (void) 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 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. + * reads data from the tcp connection. * 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; +static int +readtcp (char *xprtptr, char *buf, int len) { - register int sock = xprt->xp_sock; - -#ifdef FD_SETSIZE - fd_set mask; - fd_set readfds; - - FD_ZERO(&mask); - FD_SET(sock, &mask); -#else - register int mask = 1 << sock; - int readfds; -#endif /* def FD_SETSIZE */ - do { - readfds = mask; - if (select(_rpc_dtablesize(), &readfds, NULL, NULL, - &wait_per_try) <= 0) { - if (errno == EINTR) { - continue; - } - goto fatal_err; - } -#ifdef FD_SETSIZE - } while (!FD_ISSET(sock, &readfds)); -#else - } while (readfds != mask); -#endif /* def FD_SETSIZE */ - if ((len = read(sock, buf, len)) > 0) { - return (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; } - fatal_err: - ((struct tcp_conn *) (xprt->xp_p1))->strm_stat = XPRT_DIED; - return (-1); + } + while ((pollfd.revents & POLLIN) == 0); + + if ((len = read (sock, buf, len)) > 0) + return len; + + fatal_err: + ((struct tcp_conn *) (xprt->xp_p1))->strm_stat = XPRT_DIED; + 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; +static int +writetcp (char *xprtptr, char * 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); - } + SVCXPRT *xprt = (SVCXPRT *)xprtptr; + 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); + } + return len; } -static enum xprt_stat svctcp_stat(xprt) -SVCXPRT *xprt; +static enum xprt_stat +svctcp_stat (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); + 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; +static bool_t +svctcp_recv (SVCXPRT *xprt, 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); - } - return (FALSE); + struct tcp_conn *cd = (struct tcp_conn *) (xprt->xp_p1); + 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; /* XXXX */ + return FALSE; } -static bool_t svctcp_getargs(xprt, xdr_args, args_ptr) -SVCXPRT *xprt; -xdrproc_t xdr_args; -caddr_t args_ptr; +static bool_t +svctcp_getargs (SVCXPRT *xprt, xdrproc_t xdr_args, caddr_t args_ptr) { - - return ((*xdr_args) - (&(((struct tcp_conn *) (xprt->xp_p1))->xdrs), args_ptr)); + return ((*xdr_args) (&(((struct tcp_conn *) + (xprt->xp_p1))->xdrs), args_ptr)); } -static bool_t svctcp_freeargs(xprt, xdr_args, args_ptr) -SVCXPRT *xprt; -xdrproc_t xdr_args; -caddr_t args_ptr; +static bool_t +svctcp_freeargs (SVCXPRT *xprt, xdrproc_t xdr_args, caddr_t args_ptr) { - register XDR *xdrs = &(((struct tcp_conn *) (xprt->xp_p1))->xdrs); + XDR *xdrs = &(((struct tcp_conn *) (xprt->xp_p1))->xdrs); - xdrs->x_op = XDR_FREE; - return ((*xdr_args) (xdrs, args_ptr)); + 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; +static bool_t +svctcp_reply (SVCXPRT *xprt, struct rpc_msg *msg) { - register struct tcp_conn *cd = (struct tcp_conn *) (xprt->xp_p1); - register XDR *xdrs = &(cd->xdrs); - register 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); + struct tcp_conn *cd = (struct tcp_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; } |