lib/libc/rpc/rpc_generic.c
C | 897 lines | 692 code | 96 blank | 109 comment | 163 complexity | 0e9dfd96c6cc198bbd27bee9b8815b67 MD5 | raw file
Possible License(s): MIT, WTFPL, AGPL-1.0, BSD-3-Clause, GPL-3.0, LGPL-2.0, JSON, 0BSD
- /* $NetBSD: rpc_generic.c,v 1.24 2010/12/08 02:06:38 joerg Exp $ */
- /*
- * 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
- */
- /*
- * Copyright (c) 1986-1991 by Sun Microsystems Inc.
- */
- /* #pragma ident "@(#)rpc_generic.c 1.17 94/04/24 SMI" */
- /*
- * rpc_generic.c, Miscl routines for RPC.
- *
- */
- #include <sys/cdefs.h>
- #if defined(LIBC_SCCS) && !defined(lint)
- __RCSID("$NetBSD: rpc_generic.c,v 1.24 2010/12/08 02:06:38 joerg Exp $");
- #endif
- #include "namespace.h"
- #include "reentrant.h"
- #include <sys/types.h>
- #include <sys/param.h>
- #include <sys/socket.h>
- #include <sys/un.h>
- #include <sys/resource.h>
- #include <netinet/in.h>
- #include <netinet/tcp.h>
- #include <arpa/inet.h>
- #include <rpc/rpc.h>
- #include <assert.h>
- #include <ctype.h>
- #include <stdio.h>
- #include <netdb.h>
- #include <netconfig.h>
- #include <malloc.h>
- #include <string.h>
- #include <syslog.h>
- #include <rpc/nettype.h>
- #include "rpc_internal.h"
- #ifdef __weak_alias
- __weak_alias(taddr2uaddr,_taddr2uaddr)
- __weak_alias(uaddr2taddr,_uaddr2taddr)
- #endif
- struct handle {
- NCONF_HANDLE *nhandle;
- int nflag; /* Whether NETPATH or NETCONFIG */
- int nettype;
- };
- static const struct _rpcnettype {
- const char *name;
- const int type;
- } _rpctypelist[] = {
- { "netpath", _RPC_NETPATH },
- { "visible", _RPC_VISIBLE },
- { "circuit_v", _RPC_CIRCUIT_V },
- { "datagram_v", _RPC_DATAGRAM_V },
- { "circuit_n", _RPC_CIRCUIT_N },
- { "datagram_n", _RPC_DATAGRAM_N },
- { "tcp", _RPC_TCP },
- { "udp", _RPC_UDP },
- { 0, _RPC_NONE }
- };
- struct netid_af {
- const char *netid;
- int af;
- int protocol;
- };
- static const struct netid_af na_cvt[] = {
- { "udp", AF_INET, IPPROTO_UDP },
- { "tcp", AF_INET, IPPROTO_TCP },
- #ifdef INET6
- { "udp6", AF_INET6, IPPROTO_UDP },
- { "tcp6", AF_INET6, IPPROTO_TCP },
- #endif
- { "local", AF_LOCAL, 0 }
- };
- #if 0
- static char *strlocase __P((char *));
- #endif
- static int getnettype __P((const char *));
- /*
- * Cache the result of getrlimit(), so we don't have to do an
- * expensive call every time.
- */
- int
- __rpc_dtbsize()
- {
- static int tbsize;
- struct rlimit rl;
- if (tbsize) {
- return (tbsize);
- }
- if (getrlimit(RLIMIT_NOFILE, &rl) == 0) {
- return (tbsize = (int)rl.rlim_max);
- }
- /*
- * Something wrong. I'll try to save face by returning a
- * pessimistic number.
- */
- return (32);
- }
- /*
- * Find the appropriate buffer size
- */
- u_int
- /*ARGSUSED*/
- __rpc_get_t_size(af, proto, size)
- int af, proto;
- int size; /* Size requested */
- {
- int maxsize, defsize;
- maxsize = 256 * 1024; /* XXX */
- switch (proto) {
- case IPPROTO_TCP:
- defsize = 64 * 1024; /* XXX */
- break;
- case IPPROTO_UDP:
- defsize = UDPMSGSIZE;
- break;
- default:
- defsize = RPC_MAXDATASIZE;
- break;
- }
- if (size == 0)
- return defsize;
- /* Check whether the value is within the upper max limit */
- return (size > maxsize ? (u_int)maxsize : (u_int)size);
- }
- /*
- * Find the appropriate address buffer size
- */
- u_int
- __rpc_get_a_size(af)
- int af;
- {
- switch (af) {
- case AF_INET:
- return sizeof (struct sockaddr_in);
- #ifdef INET6
- case AF_INET6:
- return sizeof (struct sockaddr_in6);
- #endif
- case AF_LOCAL:
- return sizeof (struct sockaddr_un);
- default:
- break;
- }
- return ((u_int)RPC_MAXADDRSIZE);
- }
- #if 0
- static char *
- strlocase(p)
- char *p;
- {
- char *t = p;
- _DIAGASSERT(p != NULL);
- for (; *p; p++)
- if (isupper(*p))
- *p = tolower(*p);
- return (t);
- }
- #endif
- /*
- * Returns the type of the network as defined in <rpc/nettype.h>
- * If nettype is NULL, it defaults to NETPATH.
- */
- static int
- getnettype(nettype)
- const char *nettype;
- {
- int i;
- if ((nettype == NULL) || (nettype[0] == 0)) {
- return (_RPC_NETPATH); /* Default */
- }
- #if 0
- nettype = strlocase(nettype);
- #endif
- for (i = 0; _rpctypelist[i].name; i++)
- if (strcasecmp(nettype, _rpctypelist[i].name) == 0) {
- return (_rpctypelist[i].type);
- }
- return (_rpctypelist[i].type);
- }
- /*
- * For the given nettype (tcp or udp only), return the first structure found.
- * This should be freed by calling freenetconfigent()
- */
- #ifdef _REENTRANT
- static thread_key_t tcp_key, udp_key;
- static once_t __rpc_getconfigp_once = ONCE_INITIALIZER;
- static void
- __rpc_getconfigp_setup(void)
- {
- thr_keycreate(&tcp_key, free);
- thr_keycreate(&udp_key, free);
- }
- #endif
- struct netconfig *
- __rpc_getconfip(nettype)
- const char *nettype;
- {
- char *netid;
- char *netid_tcp = NULL;
- char *netid_udp = NULL;
- static char *netid_tcp_main;
- static char *netid_udp_main;
- struct netconfig *dummy;
- #ifdef _REENTRANT
- if (__isthreaded == 0) {
- netid_udp = netid_udp_main;
- netid_tcp = netid_tcp_main;
- } else {
- thr_once(&__rpc_getconfigp_once, __rpc_getconfigp_setup);
- netid_tcp = thr_getspecific(tcp_key);
- netid_udp = thr_getspecific(udp_key);
- }
- #else
- netid_udp = netid_udp_main;
- netid_tcp = netid_tcp_main;
- #endif
- _DIAGASSERT(nettype != NULL);
- if (!netid_udp && !netid_tcp) {
- struct netconfig *nconf;
- void *confighandle;
- if (!(confighandle = setnetconfig())) {
- syslog (LOG_ERR, "rpc: failed to open " NETCONFIG);
- return (NULL);
- }
- while ((nconf = getnetconfig(confighandle)) != NULL) {
- if (strcmp(nconf->nc_protofmly, NC_INET) == 0) {
- if (strcmp(nconf->nc_proto, NC_TCP) == 0) {
- netid_tcp = strdup(nconf->nc_netid);
- if (netid_tcp == NULL)
- return NULL;
- #ifdef _REENTRANT
- if (__isthreaded == 0)
- netid_tcp_main = netid_tcp;
- else
- thr_setspecific(tcp_key,
- (void *) netid_tcp);
- #else
- netid_tcp_main = netid_tcp;
- #endif
- } else
- if (strcmp(nconf->nc_proto, NC_UDP) == 0) {
- netid_udp = strdup(nconf->nc_netid);
- if (netid_udp == NULL)
- return NULL;
- #ifdef _REENTRANT
- if (__isthreaded == 0)
- netid_udp_main = netid_udp;
- else
- thr_setspecific(udp_key,
- (void *) netid_udp);
- #else
- netid_udp_main = netid_udp;
- #endif
- }
- }
- }
- endnetconfig(confighandle);
- }
- if (strcmp(nettype, "udp") == 0)
- netid = netid_udp;
- else if (strcmp(nettype, "tcp") == 0)
- netid = netid_tcp;
- else {
- return (NULL);
- }
- if ((netid == NULL) || (netid[0] == 0)) {
- return (NULL);
- }
- dummy = getnetconfigent(netid);
- return (dummy);
- }
- /*
- * Returns the type of the nettype, which should then be used with
- * __rpc_getconf().
- */
- void *
- __rpc_setconf(nettype)
- const char *nettype;
- {
- struct handle *handle;
- /* nettype may be NULL; getnettype() supports that */
- handle = malloc(sizeof(*handle));
- if (handle == NULL) {
- return (NULL);
- }
- switch (handle->nettype = getnettype(nettype)) {
- case _RPC_NETPATH:
- case _RPC_CIRCUIT_N:
- case _RPC_DATAGRAM_N:
- if (!(handle->nhandle = setnetpath())) {
- free(handle);
- return (NULL);
- }
- handle->nflag = TRUE;
- break;
- case _RPC_VISIBLE:
- case _RPC_CIRCUIT_V:
- case _RPC_DATAGRAM_V:
- case _RPC_TCP:
- case _RPC_UDP:
- if (!(handle->nhandle = setnetconfig())) {
- syslog (LOG_ERR, "rpc: failed to open " NETCONFIG);
- free(handle);
- return (NULL);
- }
- handle->nflag = FALSE;
- break;
- default:
- free(handle);
- return (NULL);
- }
- return (handle);
- }
- /*
- * Returns the next netconfig struct for the given "net" type.
- * __rpc_setconf() should have been called previously.
- */
- struct netconfig *
- __rpc_getconf(vhandle)
- void *vhandle;
- {
- struct handle *handle;
- struct netconfig *nconf;
- handle = (struct handle *)vhandle;
- if (handle == NULL) {
- return (NULL);
- }
- for (;;) {
- if (handle->nflag)
- nconf = getnetpath(handle->nhandle);
- else
- nconf = getnetconfig(handle->nhandle);
- if (nconf == NULL)
- break;
- if ((nconf->nc_semantics != NC_TPI_CLTS) &&
- (nconf->nc_semantics != NC_TPI_COTS) &&
- (nconf->nc_semantics != NC_TPI_COTS_ORD))
- continue;
- switch (handle->nettype) {
- case _RPC_VISIBLE:
- if (!(nconf->nc_flag & NC_VISIBLE))
- continue;
- /* FALLTHROUGH */
- case _RPC_NETPATH: /* Be happy */
- break;
- case _RPC_CIRCUIT_V:
- if (!(nconf->nc_flag & NC_VISIBLE))
- continue;
- /* FALLTHROUGH */
- case _RPC_CIRCUIT_N:
- if ((nconf->nc_semantics != NC_TPI_COTS) &&
- (nconf->nc_semantics != NC_TPI_COTS_ORD))
- continue;
- break;
- case _RPC_DATAGRAM_V:
- if (!(nconf->nc_flag & NC_VISIBLE))
- continue;
- /* FALLTHROUGH */
- case _RPC_DATAGRAM_N:
- if (nconf->nc_semantics != NC_TPI_CLTS)
- continue;
- break;
- case _RPC_TCP:
- if (((nconf->nc_semantics != NC_TPI_COTS) &&
- (nconf->nc_semantics != NC_TPI_COTS_ORD)) ||
- (strcmp(nconf->nc_protofmly, NC_INET)
- #ifdef INET6
- && strcmp(nconf->nc_protofmly, NC_INET6))
- #else
- )
- #endif
- ||
- strcmp(nconf->nc_proto, NC_TCP))
- continue;
- break;
- case _RPC_UDP:
- if ((nconf->nc_semantics != NC_TPI_CLTS) ||
- (strcmp(nconf->nc_protofmly, NC_INET)
- #ifdef INET6
- && strcmp(nconf->nc_protofmly, NC_INET6))
- #else
- )
- #endif
- ||
- strcmp(nconf->nc_proto, NC_UDP))
- continue;
- break;
- }
- break;
- }
- return (nconf);
- }
- void
- __rpc_endconf(vhandle)
- void * vhandle;
- {
- struct handle *handle;
- handle = (struct handle *) vhandle;
- if (handle == NULL) {
- return;
- }
- if (handle->nflag) {
- endnetpath(handle->nhandle);
- } else {
- endnetconfig(handle->nhandle);
- }
- free(handle);
- }
- /*
- * Used to ping the NULL procedure for clnt handle.
- * Returns NULL if fails, else a non-NULL pointer.
- */
- void *
- rpc_nullproc(clnt)
- CLIENT *clnt;
- {
- struct timeval TIMEOUT = {25, 0};
- if (clnt_call(clnt, NULLPROC, (xdrproc_t) xdr_void, NULL,
- (xdrproc_t) xdr_void, NULL, TIMEOUT) != RPC_SUCCESS) {
- return (NULL);
- }
- return ((void *) clnt);
- }
- /*
- * Try all possible transports until
- * one succeeds in finding the netconf for the given fd.
- */
- struct netconfig *
- __rpcgettp(fd)
- int fd;
- {
- const char *netid;
- struct __rpc_sockinfo si;
- if (!__rpc_fd2sockinfo(fd, &si))
- return NULL;
- if (!__rpc_sockinfo2netid(&si, &netid))
- return NULL;
- return getnetconfigent(__UNCONST(netid));
- }
- int
- __rpc_fd2sockinfo(int fd, struct __rpc_sockinfo *sip)
- {
- socklen_t len;
- int type, proto;
- struct sockaddr_storage ss;
- _DIAGASSERT(sip != NULL);
- len = sizeof ss;
- if (getsockname(fd, (struct sockaddr *)(void *)&ss, &len) < 0)
- return 0;
- sip->si_alen = len;
- len = sizeof type;
- if (getsockopt(fd, SOL_SOCKET, SO_TYPE, &type, &len) < 0)
- return 0;
- /* XXX */
- if (ss.ss_family != AF_LOCAL) {
- if (type == SOCK_STREAM)
- proto = IPPROTO_TCP;
- else if (type == SOCK_DGRAM)
- proto = IPPROTO_UDP;
- else
- return 0;
- } else
- proto = 0;
- sip->si_af = ss.ss_family;
- sip->si_proto = proto;
- sip->si_socktype = type;
- return 1;
- }
- /*
- * Linear search, but the number of entries is small.
- */
- int
- __rpc_nconf2sockinfo(const struct netconfig *nconf, struct __rpc_sockinfo *sip)
- {
- size_t i;
- _DIAGASSERT(nconf != NULL);
- _DIAGASSERT(sip != NULL);
- for (i = 0; i < (sizeof na_cvt) / (sizeof (struct netid_af)); i++)
- if (!strcmp(na_cvt[i].netid, nconf->nc_netid)) {
- sip->si_af = na_cvt[i].af;
- sip->si_proto = na_cvt[i].protocol;
- sip->si_socktype =
- __rpc_seman2socktype((int)nconf->nc_semantics);
- if (sip->si_socktype == -1)
- return 0;
- sip->si_alen = __rpc_get_a_size(sip->si_af);
- return 1;
- }
- return 0;
- }
- int
- __rpc_nconf2fd(const struct netconfig *nconf)
- {
- struct __rpc_sockinfo si;
- _DIAGASSERT(nconf != NULL);
- if (!__rpc_nconf2sockinfo(nconf, &si))
- return 0;
- return socket(si.si_af, si.si_socktype, si.si_proto);
- }
- int
- __rpc_sockinfo2netid(struct __rpc_sockinfo *sip, const char **netid)
- {
- size_t i;
- _DIAGASSERT(sip != NULL);
- /* netid may be NULL */
- for (i = 0; i < (sizeof na_cvt) / (sizeof (struct netid_af)); i++)
- if (na_cvt[i].af == sip->si_af &&
- na_cvt[i].protocol == sip->si_proto) {
- if (netid)
- *netid = na_cvt[i].netid;
- return 1;
- }
- return 0;
- }
- char *
- taddr2uaddr(const struct netconfig *nconf, const struct netbuf *nbuf)
- {
- struct __rpc_sockinfo si;
- _DIAGASSERT(nconf != NULL);
- _DIAGASSERT(nbuf != NULL);
- if (!__rpc_nconf2sockinfo(nconf, &si))
- return NULL;
- return __rpc_taddr2uaddr_af(si.si_af, nbuf);
- }
- struct netbuf *
- uaddr2taddr(const struct netconfig *nconf, const char *uaddr)
- {
- struct __rpc_sockinfo si;
- _DIAGASSERT(nconf != NULL);
- _DIAGASSERT(uaddr != NULL);
-
- if (!__rpc_nconf2sockinfo(nconf, &si))
- return NULL;
- return __rpc_uaddr2taddr_af(si.si_af, uaddr);
- }
- char *
- __rpc_taddr2uaddr_af(int af, const struct netbuf *nbuf)
- {
- char *ret;
- struct sockaddr_in *sinp;
- struct sockaddr_un *sun;
- char namebuf[INET_ADDRSTRLEN];
- #ifdef INET6
- struct sockaddr_in6 *sin6;
- char namebuf6[INET6_ADDRSTRLEN];
- #endif
- u_int16_t port;
- _DIAGASSERT(nbuf != NULL);
- switch (af) {
- case AF_INET:
- sinp = nbuf->buf;
- if (inet_ntop(af, &sinp->sin_addr, namebuf, sizeof namebuf)
- == NULL)
- return NULL;
- port = ntohs(sinp->sin_port);
- if (asprintf(&ret, "%s.%u.%u", namebuf, ((u_int32_t)port) >> 8,
- port & 0xff) < 0)
- return NULL;
- break;
- #ifdef INET6
- case AF_INET6:
- sin6 = nbuf->buf;
- if (inet_ntop(af, &sin6->sin6_addr, namebuf6, sizeof namebuf6)
- == NULL)
- return NULL;
- port = ntohs(sin6->sin6_port);
- if (asprintf(&ret, "%s.%u.%u", namebuf6, ((u_int32_t)port) >> 8,
- port & 0xff) < 0)
- return NULL;
- break;
- #endif
- case AF_LOCAL:
- sun = nbuf->buf;
- sun->sun_path[sizeof(sun->sun_path) - 1] = '\0'; /* safety */
- ret = strdup(sun->sun_path);
- break;
- default:
- return NULL;
- }
- return ret;
- }
- struct netbuf *
- __rpc_uaddr2taddr_af(int af, const char *uaddr)
- {
- struct netbuf *ret = NULL;
- char *addrstr, *p;
- unsigned port, portlo, porthi;
- struct sockaddr_in *sinp;
- #ifdef INET6
- struct sockaddr_in6 *sin6;
- #endif
- struct sockaddr_un *sun;
- _DIAGASSERT(uaddr != NULL);
- addrstr = strdup(uaddr);
- if (addrstr == NULL)
- return NULL;
- /*
- * AF_LOCAL addresses are expected to be absolute
- * pathnames, anything else will be AF_INET or AF_INET6.
- */
- port = 0;
- if (*addrstr != '/') {
- p = strrchr(addrstr, '.');
- if (p == NULL)
- goto out;
- portlo = (unsigned)atoi(p + 1);
- *p = '\0';
- p = strrchr(addrstr, '.');
- if (p == NULL)
- goto out;
- porthi = (unsigned)atoi(p + 1);
- *p = '\0';
- port = (porthi << 8) | portlo;
- }
- ret = malloc(sizeof(*ret));
- if (ret == NULL)
- goto out;
-
- switch (af) {
- case AF_INET:
- sinp = malloc(sizeof(*sinp));
- if (sinp == NULL)
- goto out;
- memset(sinp, 0, sizeof *sinp);
- sinp->sin_family = AF_INET;
- sinp->sin_port = htons(port);
- if (inet_pton(AF_INET, addrstr, &sinp->sin_addr) <= 0) {
- free(sinp);
- free(ret);
- ret = NULL;
- goto out;
- }
- sinp->sin_len = ret->maxlen = ret->len = sizeof *sinp;
- ret->buf = sinp;
- break;
- #ifdef INET6
- case AF_INET6:
- sin6 = malloc(sizeof(*sin6));
- if (sin6 == NULL)
- goto out;
- memset(sin6, 0, sizeof *sin6);
- sin6->sin6_family = AF_INET6;
- sin6->sin6_port = htons(port);
- if (inet_pton(AF_INET6, addrstr, &sin6->sin6_addr) <= 0) {
- free(sin6);
- free(ret);
- ret = NULL;
- goto out;
- }
- sin6->sin6_len = ret->maxlen = ret->len = sizeof *sin6;
- ret->buf = sin6;
- break;
- #endif
- case AF_LOCAL:
- sun = malloc(sizeof(*sun));
- if (sun == NULL)
- goto out;
- memset(sun, 0, sizeof *sun);
- sun->sun_family = AF_LOCAL;
- strncpy(sun->sun_path, addrstr, sizeof(sun->sun_path) - 1);
- ret->len = ret->maxlen = sun->sun_len = SUN_LEN(sun);
- ret->buf = sun;
- break;
- default:
- break;
- }
- out:
- free(addrstr);
- return ret;
- }
- int
- __rpc_seman2socktype(int semantics)
- {
- switch (semantics) {
- case NC_TPI_CLTS:
- return SOCK_DGRAM;
- case NC_TPI_COTS_ORD:
- return SOCK_STREAM;
- case NC_TPI_RAW:
- return SOCK_RAW;
- default:
- break;
- }
- return -1;
- }
- int
- __rpc_socktype2seman(int socktype)
- {
- switch (socktype) {
- case SOCK_DGRAM:
- return NC_TPI_CLTS;
- case SOCK_STREAM:
- return NC_TPI_COTS_ORD;
- case SOCK_RAW:
- return NC_TPI_RAW;
- default:
- break;
- }
- return -1;
- }
- /*
- * XXXX - IPv6 scope IDs can't be handled in universal addresses.
- * Here, we compare the original server address to that of the RPC
- * service we just received back from a call to rpcbind on the remote
- * machine. If they are both "link local" or "site local", copy
- * the scope id of the server address over to the service address.
- */
- /* ARGSUSED */
- int
- __rpc_fixup_addr(struct netbuf *new, const struct netbuf *svc)
- {
- #ifdef INET6
- struct sockaddr *sa_new, *sa_svc;
- struct sockaddr_in6 *sin6_new, *sin6_svc;
- _DIAGASSERT(new != NULL);
- _DIAGASSERT(svc != NULL);
- sa_svc = (struct sockaddr *)svc->buf;
- sa_new = (struct sockaddr *)new->buf;
- if (sa_new->sa_family == sa_svc->sa_family &&
- sa_new->sa_family == AF_INET6) {
- sin6_new = (struct sockaddr_in6 *)new->buf;
- sin6_svc = (struct sockaddr_in6 *)svc->buf;
- if ((IN6_IS_ADDR_LINKLOCAL(&sin6_new->sin6_addr) &&
- IN6_IS_ADDR_LINKLOCAL(&sin6_svc->sin6_addr)) ||
- (IN6_IS_ADDR_SITELOCAL(&sin6_new->sin6_addr) &&
- IN6_IS_ADDR_SITELOCAL(&sin6_svc->sin6_addr))) {
- sin6_new->sin6_scope_id = sin6_svc->sin6_scope_id;
- }
- }
- #endif
- return 1;
- }
- int
- __rpc_sockisbound(int fd)
- {
- struct sockaddr_storage ss;
- socklen_t slen;
- slen = sizeof (struct sockaddr_storage);
- if (getsockname(fd, (struct sockaddr *)(void *)&ss, &slen) < 0)
- return 0;
- switch (ss.ss_family) {
- case AF_INET:
- return (((struct sockaddr_in *)
- (void *)&ss)->sin_port != 0);
- #ifdef INET6
- case AF_INET6:
- return (((struct sockaddr_in6 *)
- (void *)&ss)->sin6_port != 0);
- #endif
- case AF_LOCAL:
- /* XXX check this */
- return (((struct sockaddr_un *)
- (void *)&ss)->sun_path[0] != '\0');
- default:
- break;
- }
- return 0;
- }
- /*
- * For TCP transport, Host Requirements RFCs mandate
- * Nagle (RFC-896) processing. But for RPC, Nagle
- * processing adds adds unwanted latency to the last,
- * partial TCP segment of each RPC message. See:
- * R. W. Scheifler and J. Gettys, The X Window System,
- * ACM Transactions on Graphics 16:8 (Aug. 1983), pp. 57-69.
- * So for TCP transport, disable Nagle via TCP_NODELAY.
- * XXX: moral equivalent for non-TCP protocols?
- */
- int
- __rpc_setnodelay(int fd, const struct __rpc_sockinfo *si)
- {
- int one = 1;
- if (si->si_proto != IPPROTO_TCP)
- return 0;
- return setsockopt(fd, si->si_proto, TCP_NODELAY, &one, sizeof(one));
- }