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rpc_generic.c revision 1.25
      1  1.25  christos /*	$NetBSD: rpc_generic.c,v 1.25 2012/03/13 21:13:44 christos Exp $	*/
      2   1.1      fvdl 
      3   1.1      fvdl /*
      4   1.1      fvdl  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
      5   1.1      fvdl  * unrestricted use provided that this legend is included on all tape
      6   1.1      fvdl  * media and as a part of the software program in whole or part.  Users
      7   1.1      fvdl  * may copy or modify Sun RPC without charge, but are not authorized
      8   1.1      fvdl  * to license or distribute it to anyone else except as part of a product or
      9   1.1      fvdl  * program developed by the user.
     10   1.1      fvdl  *
     11   1.1      fvdl  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
     12   1.1      fvdl  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
     13   1.1      fvdl  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
     14   1.1      fvdl  *
     15   1.1      fvdl  * Sun RPC is provided with no support and without any obligation on the
     16   1.1      fvdl  * part of Sun Microsystems, Inc. to assist in its use, correction,
     17   1.1      fvdl  * modification or enhancement.
     18   1.1      fvdl  *
     19   1.1      fvdl  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
     20   1.1      fvdl  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
     21   1.1      fvdl  * OR ANY PART THEREOF.
     22   1.1      fvdl  *
     23   1.1      fvdl  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
     24   1.1      fvdl  * or profits or other special, indirect and consequential damages, even if
     25   1.1      fvdl  * Sun has been advised of the possibility of such damages.
     26   1.1      fvdl  *
     27   1.1      fvdl  * Sun Microsystems, Inc.
     28   1.1      fvdl  * 2550 Garcia Avenue
     29   1.1      fvdl  * Mountain View, California  94043
     30   1.1      fvdl  */
     31   1.1      fvdl /*
     32   1.1      fvdl  * Copyright (c) 1986-1991 by Sun Microsystems Inc.
     33   1.1      fvdl  */
     34   1.1      fvdl 
     35   1.1      fvdl /* #pragma ident	"@(#)rpc_generic.c	1.17	94/04/24 SMI" */
     36   1.1      fvdl 
     37   1.1      fvdl /*
     38   1.1      fvdl  * rpc_generic.c, Miscl routines for RPC.
     39   1.1      fvdl  *
     40   1.1      fvdl  */
     41   1.1      fvdl 
     42  1.15    itojun #include <sys/cdefs.h>
     43  1.15    itojun #if defined(LIBC_SCCS) && !defined(lint)
     44  1.25  christos __RCSID("$NetBSD: rpc_generic.c,v 1.25 2012/03/13 21:13:44 christos Exp $");
     45  1.15    itojun #endif
     46  1.15    itojun 
     47   1.4    kleink #include "namespace.h"
     48  1.12   thorpej #include "reentrant.h"
     49   1.1      fvdl #include <sys/types.h>
     50   1.1      fvdl #include <sys/param.h>
     51   1.1      fvdl #include <sys/socket.h>
     52   1.1      fvdl #include <sys/un.h>
     53   1.1      fvdl #include <sys/resource.h>
     54   1.1      fvdl #include <netinet/in.h>
     55  1.22  christos #include <netinet/tcp.h>
     56   1.1      fvdl #include <arpa/inet.h>
     57   1.1      fvdl #include <rpc/rpc.h>
     58   1.5     lukem #include <assert.h>
     59   1.1      fvdl #include <ctype.h>
     60   1.1      fvdl #include <stdio.h>
     61   1.1      fvdl #include <netdb.h>
     62   1.1      fvdl #include <netconfig.h>
     63   1.1      fvdl #include <malloc.h>
     64   1.1      fvdl #include <string.h>
     65   1.2     assar #include <syslog.h>
     66   1.1      fvdl #include <rpc/nettype.h>
     67  1.10      fvdl #include "rpc_internal.h"
     68   1.1      fvdl 
     69  1.18    kleink #ifdef __weak_alias
     70  1.18    kleink __weak_alias(taddr2uaddr,_taddr2uaddr)
     71  1.18    kleink __weak_alias(uaddr2taddr,_uaddr2taddr)
     72  1.18    kleink #endif
     73  1.18    kleink 
     74   1.1      fvdl struct handle {
     75   1.1      fvdl 	NCONF_HANDLE *nhandle;
     76   1.1      fvdl 	int nflag;		/* Whether NETPATH or NETCONFIG */
     77   1.1      fvdl 	int nettype;
     78   1.1      fvdl };
     79   1.1      fvdl 
     80   1.6  jdolecek static const struct _rpcnettype {
     81   1.1      fvdl 	const char *name;
     82   1.1      fvdl 	const int type;
     83   1.1      fvdl } _rpctypelist[] = {
     84   1.1      fvdl 	{ "netpath", _RPC_NETPATH },
     85   1.1      fvdl 	{ "visible", _RPC_VISIBLE },
     86   1.1      fvdl 	{ "circuit_v", _RPC_CIRCUIT_V },
     87   1.1      fvdl 	{ "datagram_v", _RPC_DATAGRAM_V },
     88   1.1      fvdl 	{ "circuit_n", _RPC_CIRCUIT_N },
     89   1.1      fvdl 	{ "datagram_n", _RPC_DATAGRAM_N },
     90   1.1      fvdl 	{ "tcp", _RPC_TCP },
     91   1.1      fvdl 	{ "udp", _RPC_UDP },
     92   1.1      fvdl 	{ 0, _RPC_NONE }
     93   1.1      fvdl };
     94   1.1      fvdl 
     95   1.1      fvdl struct netid_af {
     96   1.1      fvdl 	const char	*netid;
     97   1.1      fvdl 	int		af;
     98   1.1      fvdl 	int		protocol;
     99   1.1      fvdl };
    100   1.1      fvdl 
    101   1.6  jdolecek static const struct netid_af na_cvt[] = {
    102   1.1      fvdl 	{ "udp",  AF_INET,  IPPROTO_UDP },
    103   1.1      fvdl 	{ "tcp",  AF_INET,  IPPROTO_TCP },
    104   1.1      fvdl #ifdef INET6
    105   1.1      fvdl 	{ "udp6", AF_INET6, IPPROTO_UDP },
    106   1.1      fvdl 	{ "tcp6", AF_INET6, IPPROTO_TCP },
    107   1.1      fvdl #endif
    108   1.1      fvdl 	{ "local", AF_LOCAL, 0 }
    109   1.1      fvdl };
    110   1.1      fvdl 
    111   1.3  christos #if 0
    112   1.1      fvdl static char *strlocase __P((char *));
    113   1.3  christos #endif
    114   1.3  christos static int getnettype __P((const char *));
    115   1.1      fvdl 
    116   1.1      fvdl /*
    117   1.1      fvdl  * Cache the result of getrlimit(), so we don't have to do an
    118   1.1      fvdl  * expensive call every time.
    119   1.1      fvdl  */
    120   1.1      fvdl int
    121   1.1      fvdl __rpc_dtbsize()
    122   1.1      fvdl {
    123   1.1      fvdl 	static int tbsize;
    124   1.1      fvdl 	struct rlimit rl;
    125   1.1      fvdl 
    126   1.1      fvdl 	if (tbsize) {
    127   1.1      fvdl 		return (tbsize);
    128   1.1      fvdl 	}
    129   1.1      fvdl 	if (getrlimit(RLIMIT_NOFILE, &rl) == 0) {
    130   1.3  christos 		return (tbsize = (int)rl.rlim_max);
    131   1.1      fvdl 	}
    132   1.1      fvdl 	/*
    133   1.1      fvdl 	 * Something wrong.  I'll try to save face by returning a
    134   1.1      fvdl 	 * pessimistic number.
    135   1.1      fvdl 	 */
    136   1.1      fvdl 	return (32);
    137   1.1      fvdl }
    138   1.1      fvdl 
    139   1.1      fvdl 
    140   1.1      fvdl /*
    141   1.1      fvdl  * Find the appropriate buffer size
    142   1.1      fvdl  */
    143   1.1      fvdl u_int
    144   1.3  christos /*ARGSUSED*/
    145   1.1      fvdl __rpc_get_t_size(af, proto, size)
    146   1.1      fvdl 	int af, proto;
    147   1.1      fvdl 	int size;	/* Size requested */
    148   1.1      fvdl {
    149  1.13      yamt 	int maxsize, defsize;
    150   1.1      fvdl 
    151  1.13      yamt 	maxsize = 256 * 1024;	/* XXX */
    152   1.1      fvdl 	switch (proto) {
    153   1.1      fvdl 	case IPPROTO_TCP:
    154  1.13      yamt 		defsize = 64 * 1024;	/* XXX */
    155   1.1      fvdl 		break;
    156   1.1      fvdl 	case IPPROTO_UDP:
    157  1.13      yamt 		defsize = UDPMSGSIZE;
    158   1.1      fvdl 		break;
    159   1.1      fvdl 	default:
    160  1.13      yamt 		defsize = RPC_MAXDATASIZE;
    161   1.1      fvdl 		break;
    162   1.1      fvdl 	}
    163   1.1      fvdl 	if (size == 0)
    164  1.13      yamt 		return defsize;
    165   1.1      fvdl 
    166   1.1      fvdl 	/* Check whether the value is within the upper max limit */
    167   1.1      fvdl 	return (size > maxsize ? (u_int)maxsize : (u_int)size);
    168   1.1      fvdl }
    169   1.1      fvdl 
    170   1.1      fvdl /*
    171   1.1      fvdl  * Find the appropriate address buffer size
    172   1.1      fvdl  */
    173   1.1      fvdl u_int
    174   1.1      fvdl __rpc_get_a_size(af)
    175   1.1      fvdl 	int af;
    176   1.1      fvdl {
    177   1.1      fvdl 	switch (af) {
    178   1.1      fvdl 	case AF_INET:
    179   1.1      fvdl 		return sizeof (struct sockaddr_in);
    180   1.1      fvdl #ifdef INET6
    181   1.1      fvdl 	case AF_INET6:
    182   1.1      fvdl 		return sizeof (struct sockaddr_in6);
    183   1.1      fvdl #endif
    184   1.1      fvdl 	case AF_LOCAL:
    185   1.1      fvdl 		return sizeof (struct sockaddr_un);
    186   1.1      fvdl 	default:
    187   1.1      fvdl 		break;
    188   1.1      fvdl 	}
    189   1.1      fvdl 	return ((u_int)RPC_MAXADDRSIZE);
    190   1.1      fvdl }
    191   1.1      fvdl 
    192   1.3  christos #if 0
    193   1.1      fvdl static char *
    194   1.1      fvdl strlocase(p)
    195   1.1      fvdl 	char *p;
    196   1.1      fvdl {
    197   1.1      fvdl 	char *t = p;
    198   1.1      fvdl 
    199   1.5     lukem 	_DIAGASSERT(p != NULL);
    200   1.5     lukem 
    201   1.1      fvdl 	for (; *p; p++)
    202   1.1      fvdl 		if (isupper(*p))
    203   1.1      fvdl 			*p = tolower(*p);
    204   1.1      fvdl 	return (t);
    205   1.1      fvdl }
    206   1.3  christos #endif
    207   1.1      fvdl 
    208   1.1      fvdl /*
    209   1.1      fvdl  * Returns the type of the network as defined in <rpc/nettype.h>
    210   1.1      fvdl  * If nettype is NULL, it defaults to NETPATH.
    211   1.1      fvdl  */
    212   1.1      fvdl static int
    213   1.1      fvdl getnettype(nettype)
    214   1.3  christos 	const char *nettype;
    215   1.1      fvdl {
    216   1.1      fvdl 	int i;
    217   1.1      fvdl 
    218  1.16      fvdl 	if ((nettype == NULL) || (nettype[0] == 0)) {
    219   1.1      fvdl 		return (_RPC_NETPATH);	/* Default */
    220   1.1      fvdl 	}
    221   1.1      fvdl 
    222   1.3  christos #if 0
    223   1.1      fvdl 	nettype = strlocase(nettype);
    224   1.3  christos #endif
    225   1.1      fvdl 	for (i = 0; _rpctypelist[i].name; i++)
    226   1.3  christos 		if (strcasecmp(nettype, _rpctypelist[i].name) == 0) {
    227   1.1      fvdl 			return (_rpctypelist[i].type);
    228   1.1      fvdl 		}
    229   1.1      fvdl 	return (_rpctypelist[i].type);
    230   1.1      fvdl }
    231   1.1      fvdl 
    232   1.1      fvdl /*
    233   1.1      fvdl  * For the given nettype (tcp or udp only), return the first structure found.
    234   1.1      fvdl  * This should be freed by calling freenetconfigent()
    235   1.1      fvdl  */
    236  1.12   thorpej 
    237  1.12   thorpej #ifdef _REENTRANT
    238  1.12   thorpej static thread_key_t tcp_key, udp_key;
    239  1.12   thorpej static once_t __rpc_getconfigp_once = ONCE_INITIALIZER;
    240  1.12   thorpej 
    241  1.12   thorpej static void
    242  1.12   thorpej __rpc_getconfigp_setup(void)
    243  1.12   thorpej {
    244  1.12   thorpej 
    245  1.12   thorpej 	thr_keycreate(&tcp_key, free);
    246  1.12   thorpej 	thr_keycreate(&udp_key, free);
    247  1.12   thorpej }
    248  1.12   thorpej #endif
    249  1.12   thorpej 
    250   1.1      fvdl struct netconfig *
    251   1.1      fvdl __rpc_getconfip(nettype)
    252   1.3  christos 	const char *nettype;
    253   1.1      fvdl {
    254   1.1      fvdl 	char *netid;
    255  1.23  christos 	char *netid_tcp = NULL;
    256  1.23  christos 	char *netid_udp = NULL;
    257   1.1      fvdl 	static char *netid_tcp_main;
    258   1.1      fvdl 	static char *netid_udp_main;
    259   1.1      fvdl 	struct netconfig *dummy;
    260  1.12   thorpej #ifdef _REENTRANT
    261  1.12   thorpej 	if (__isthreaded == 0) {
    262   1.1      fvdl 		netid_udp = netid_udp_main;
    263   1.1      fvdl 		netid_tcp = netid_tcp_main;
    264   1.1      fvdl 	} else {
    265  1.12   thorpej 		thr_once(&__rpc_getconfigp_once, __rpc_getconfigp_setup);
    266  1.12   thorpej 		netid_tcp = thr_getspecific(tcp_key);
    267  1.12   thorpej 		netid_udp = thr_getspecific(udp_key);
    268   1.1      fvdl 	}
    269   1.1      fvdl #else
    270   1.1      fvdl 	netid_udp = netid_udp_main;
    271   1.1      fvdl 	netid_tcp = netid_tcp_main;
    272   1.1      fvdl #endif
    273   1.5     lukem 
    274   1.5     lukem 	_DIAGASSERT(nettype != NULL);
    275   1.5     lukem 
    276   1.1      fvdl 	if (!netid_udp && !netid_tcp) {
    277   1.1      fvdl 		struct netconfig *nconf;
    278   1.1      fvdl 		void *confighandle;
    279   1.1      fvdl 
    280   1.1      fvdl 		if (!(confighandle = setnetconfig())) {
    281   1.2     assar 			syslog (LOG_ERR, "rpc: failed to open " NETCONFIG);
    282   1.1      fvdl 			return (NULL);
    283   1.1      fvdl 		}
    284   1.3  christos 		while ((nconf = getnetconfig(confighandle)) != NULL) {
    285   1.1      fvdl 			if (strcmp(nconf->nc_protofmly, NC_INET) == 0) {
    286   1.1      fvdl 				if (strcmp(nconf->nc_proto, NC_TCP) == 0) {
    287   1.1      fvdl 					netid_tcp = strdup(nconf->nc_netid);
    288  1.23  christos 					if (netid_tcp == NULL)
    289  1.23  christos 						return NULL;
    290  1.12   thorpej #ifdef _REENTRANT
    291  1.12   thorpej 					if (__isthreaded == 0)
    292   1.1      fvdl 						netid_tcp_main = netid_tcp;
    293   1.1      fvdl 					else
    294   1.1      fvdl 						thr_setspecific(tcp_key,
    295   1.1      fvdl 							(void *) netid_tcp);
    296   1.1      fvdl #else
    297   1.1      fvdl 					netid_tcp_main = netid_tcp;
    298   1.1      fvdl #endif
    299   1.1      fvdl 				} else
    300   1.1      fvdl 				if (strcmp(nconf->nc_proto, NC_UDP) == 0) {
    301   1.1      fvdl 					netid_udp = strdup(nconf->nc_netid);
    302  1.23  christos 					if (netid_udp == NULL)
    303  1.23  christos 						return NULL;
    304  1.12   thorpej #ifdef _REENTRANT
    305  1.12   thorpej 					if (__isthreaded == 0)
    306   1.1      fvdl 						netid_udp_main = netid_udp;
    307   1.1      fvdl 					else
    308   1.1      fvdl 						thr_setspecific(udp_key,
    309   1.1      fvdl 							(void *) netid_udp);
    310   1.1      fvdl #else
    311   1.1      fvdl 					netid_udp_main = netid_udp;
    312   1.1      fvdl #endif
    313   1.1      fvdl 				}
    314   1.1      fvdl 			}
    315   1.1      fvdl 		}
    316   1.1      fvdl 		endnetconfig(confighandle);
    317   1.1      fvdl 	}
    318   1.1      fvdl 	if (strcmp(nettype, "udp") == 0)
    319   1.1      fvdl 		netid = netid_udp;
    320   1.1      fvdl 	else if (strcmp(nettype, "tcp") == 0)
    321   1.1      fvdl 		netid = netid_tcp;
    322   1.1      fvdl 	else {
    323   1.3  christos 		return (NULL);
    324   1.1      fvdl 	}
    325  1.16      fvdl 	if ((netid == NULL) || (netid[0] == 0)) {
    326   1.3  christos 		return (NULL);
    327   1.1      fvdl 	}
    328   1.1      fvdl 	dummy = getnetconfigent(netid);
    329   1.1      fvdl 	return (dummy);
    330   1.1      fvdl }
    331   1.1      fvdl 
    332   1.1      fvdl /*
    333   1.1      fvdl  * Returns the type of the nettype, which should then be used with
    334   1.1      fvdl  * __rpc_getconf().
    335   1.1      fvdl  */
    336   1.1      fvdl void *
    337   1.1      fvdl __rpc_setconf(nettype)
    338   1.3  christos 	const char *nettype;
    339   1.1      fvdl {
    340   1.1      fvdl 	struct handle *handle;
    341   1.1      fvdl 
    342   1.5     lukem 	/* nettype may be NULL; getnettype() supports that */
    343   1.5     lukem 
    344  1.23  christos 	handle = malloc(sizeof(*handle));
    345   1.1      fvdl 	if (handle == NULL) {
    346   1.1      fvdl 		return (NULL);
    347   1.1      fvdl 	}
    348   1.1      fvdl 	switch (handle->nettype = getnettype(nettype)) {
    349   1.1      fvdl 	case _RPC_NETPATH:
    350   1.1      fvdl 	case _RPC_CIRCUIT_N:
    351   1.1      fvdl 	case _RPC_DATAGRAM_N:
    352   1.1      fvdl 		if (!(handle->nhandle = setnetpath())) {
    353   1.1      fvdl 			free(handle);
    354   1.1      fvdl 			return (NULL);
    355   1.1      fvdl 		}
    356   1.1      fvdl 		handle->nflag = TRUE;
    357   1.1      fvdl 		break;
    358   1.1      fvdl 	case _RPC_VISIBLE:
    359   1.1      fvdl 	case _RPC_CIRCUIT_V:
    360   1.1      fvdl 	case _RPC_DATAGRAM_V:
    361   1.1      fvdl 	case _RPC_TCP:
    362   1.1      fvdl 	case _RPC_UDP:
    363   1.1      fvdl 		if (!(handle->nhandle = setnetconfig())) {
    364   1.2     assar 		        syslog (LOG_ERR, "rpc: failed to open " NETCONFIG);
    365   1.1      fvdl 			free(handle);
    366   1.1      fvdl 			return (NULL);
    367   1.1      fvdl 		}
    368   1.1      fvdl 		handle->nflag = FALSE;
    369   1.1      fvdl 		break;
    370   1.1      fvdl 	default:
    371  1.21  christos 		free(handle);
    372   1.1      fvdl 		return (NULL);
    373   1.1      fvdl 	}
    374   1.1      fvdl 
    375   1.1      fvdl 	return (handle);
    376   1.1      fvdl }
    377   1.1      fvdl 
    378   1.1      fvdl /*
    379   1.1      fvdl  * Returns the next netconfig struct for the given "net" type.
    380   1.1      fvdl  * __rpc_setconf() should have been called previously.
    381   1.1      fvdl  */
    382   1.1      fvdl struct netconfig *
    383   1.1      fvdl __rpc_getconf(vhandle)
    384   1.1      fvdl 	void *vhandle;
    385   1.1      fvdl {
    386   1.1      fvdl 	struct handle *handle;
    387   1.1      fvdl 	struct netconfig *nconf;
    388   1.1      fvdl 
    389   1.1      fvdl 	handle = (struct handle *)vhandle;
    390   1.1      fvdl 	if (handle == NULL) {
    391   1.1      fvdl 		return (NULL);
    392   1.1      fvdl 	}
    393   1.3  christos 	for (;;) {
    394   1.1      fvdl 		if (handle->nflag)
    395   1.1      fvdl 			nconf = getnetpath(handle->nhandle);
    396   1.1      fvdl 		else
    397   1.1      fvdl 			nconf = getnetconfig(handle->nhandle);
    398   1.3  christos 		if (nconf == NULL)
    399   1.1      fvdl 			break;
    400   1.1      fvdl 		if ((nconf->nc_semantics != NC_TPI_CLTS) &&
    401   1.1      fvdl 			(nconf->nc_semantics != NC_TPI_COTS) &&
    402   1.1      fvdl 			(nconf->nc_semantics != NC_TPI_COTS_ORD))
    403   1.1      fvdl 			continue;
    404   1.1      fvdl 		switch (handle->nettype) {
    405   1.1      fvdl 		case _RPC_VISIBLE:
    406   1.1      fvdl 			if (!(nconf->nc_flag & NC_VISIBLE))
    407   1.1      fvdl 				continue;
    408   1.1      fvdl 			/* FALLTHROUGH */
    409   1.1      fvdl 		case _RPC_NETPATH:	/* Be happy */
    410   1.1      fvdl 			break;
    411   1.1      fvdl 		case _RPC_CIRCUIT_V:
    412   1.1      fvdl 			if (!(nconf->nc_flag & NC_VISIBLE))
    413   1.1      fvdl 				continue;
    414   1.1      fvdl 			/* FALLTHROUGH */
    415   1.1      fvdl 		case _RPC_CIRCUIT_N:
    416   1.1      fvdl 			if ((nconf->nc_semantics != NC_TPI_COTS) &&
    417   1.1      fvdl 				(nconf->nc_semantics != NC_TPI_COTS_ORD))
    418   1.1      fvdl 				continue;
    419   1.1      fvdl 			break;
    420   1.1      fvdl 		case _RPC_DATAGRAM_V:
    421   1.1      fvdl 			if (!(nconf->nc_flag & NC_VISIBLE))
    422   1.1      fvdl 				continue;
    423   1.1      fvdl 			/* FALLTHROUGH */
    424   1.1      fvdl 		case _RPC_DATAGRAM_N:
    425   1.1      fvdl 			if (nconf->nc_semantics != NC_TPI_CLTS)
    426   1.1      fvdl 				continue;
    427   1.1      fvdl 			break;
    428   1.1      fvdl 		case _RPC_TCP:
    429   1.1      fvdl 			if (((nconf->nc_semantics != NC_TPI_COTS) &&
    430   1.1      fvdl 				(nconf->nc_semantics != NC_TPI_COTS_ORD)) ||
    431   1.1      fvdl 				(strcmp(nconf->nc_protofmly, NC_INET)
    432   1.1      fvdl #ifdef INET6
    433   1.1      fvdl 				 && strcmp(nconf->nc_protofmly, NC_INET6))
    434   1.1      fvdl #else
    435   1.1      fvdl 				)
    436   1.1      fvdl #endif
    437   1.1      fvdl 				||
    438   1.1      fvdl 				strcmp(nconf->nc_proto, NC_TCP))
    439   1.1      fvdl 				continue;
    440   1.1      fvdl 			break;
    441   1.1      fvdl 		case _RPC_UDP:
    442   1.1      fvdl 			if ((nconf->nc_semantics != NC_TPI_CLTS) ||
    443   1.1      fvdl 				(strcmp(nconf->nc_protofmly, NC_INET)
    444   1.1      fvdl #ifdef INET6
    445   1.1      fvdl 				&& strcmp(nconf->nc_protofmly, NC_INET6))
    446   1.1      fvdl #else
    447   1.1      fvdl 				)
    448   1.1      fvdl #endif
    449   1.1      fvdl 				||
    450   1.1      fvdl 				strcmp(nconf->nc_proto, NC_UDP))
    451   1.1      fvdl 				continue;
    452   1.1      fvdl 			break;
    453   1.1      fvdl 		}
    454   1.1      fvdl 		break;
    455   1.1      fvdl 	}
    456   1.1      fvdl 	return (nconf);
    457   1.1      fvdl }
    458   1.1      fvdl 
    459   1.1      fvdl void
    460   1.1      fvdl __rpc_endconf(vhandle)
    461   1.1      fvdl 	void * vhandle;
    462   1.1      fvdl {
    463   1.1      fvdl 	struct handle *handle;
    464   1.1      fvdl 
    465   1.1      fvdl 	handle = (struct handle *) vhandle;
    466   1.1      fvdl 	if (handle == NULL) {
    467   1.1      fvdl 		return;
    468   1.1      fvdl 	}
    469   1.1      fvdl 	if (handle->nflag) {
    470   1.1      fvdl 		endnetpath(handle->nhandle);
    471   1.1      fvdl 	} else {
    472   1.1      fvdl 		endnetconfig(handle->nhandle);
    473   1.1      fvdl 	}
    474   1.1      fvdl 	free(handle);
    475   1.1      fvdl }
    476   1.1      fvdl 
    477   1.1      fvdl /*
    478   1.1      fvdl  * Used to ping the NULL procedure for clnt handle.
    479   1.1      fvdl  * Returns NULL if fails, else a non-NULL pointer.
    480   1.1      fvdl  */
    481   1.1      fvdl void *
    482   1.1      fvdl rpc_nullproc(clnt)
    483   1.1      fvdl 	CLIENT *clnt;
    484   1.1      fvdl {
    485   1.1      fvdl 	struct timeval TIMEOUT = {25, 0};
    486   1.1      fvdl 
    487   1.3  christos 	if (clnt_call(clnt, NULLPROC, (xdrproc_t) xdr_void, NULL,
    488   1.3  christos 		(xdrproc_t) xdr_void, NULL, TIMEOUT) != RPC_SUCCESS) {
    489   1.3  christos 		return (NULL);
    490   1.1      fvdl 	}
    491   1.1      fvdl 	return ((void *) clnt);
    492   1.1      fvdl }
    493   1.1      fvdl 
    494   1.1      fvdl /*
    495   1.1      fvdl  * Try all possible transports until
    496   1.1      fvdl  * one succeeds in finding the netconf for the given fd.
    497   1.1      fvdl  */
    498   1.1      fvdl struct netconfig *
    499   1.1      fvdl __rpcgettp(fd)
    500   1.1      fvdl 	int fd;
    501   1.1      fvdl {
    502   1.1      fvdl 	const char *netid;
    503   1.1      fvdl 	struct __rpc_sockinfo si;
    504   1.1      fvdl 
    505   1.1      fvdl 	if (!__rpc_fd2sockinfo(fd, &si))
    506   1.1      fvdl 		return NULL;
    507   1.1      fvdl 
    508   1.1      fvdl 	if (!__rpc_sockinfo2netid(&si, &netid))
    509   1.1      fvdl 		return NULL;
    510   1.1      fvdl 
    511  1.20  christos 	return getnetconfigent(__UNCONST(netid));
    512   1.1      fvdl }
    513   1.1      fvdl 
    514   1.1      fvdl int
    515   1.1      fvdl __rpc_fd2sockinfo(int fd, struct __rpc_sockinfo *sip)
    516   1.1      fvdl {
    517   1.1      fvdl 	socklen_t len;
    518   1.1      fvdl 	int type, proto;
    519   1.1      fvdl 	struct sockaddr_storage ss;
    520   1.1      fvdl 
    521   1.5     lukem 	_DIAGASSERT(sip != NULL);
    522   1.5     lukem 
    523   1.1      fvdl 	len = sizeof ss;
    524   1.3  christos 	if (getsockname(fd, (struct sockaddr *)(void *)&ss, &len) < 0)
    525   1.1      fvdl 		return 0;
    526   1.1      fvdl 	sip->si_alen = len;
    527   1.1      fvdl 
    528   1.1      fvdl 	len = sizeof type;
    529   1.1      fvdl 	if (getsockopt(fd, SOL_SOCKET, SO_TYPE, &type, &len) < 0)
    530   1.1      fvdl 		return 0;
    531   1.1      fvdl 
    532   1.1      fvdl 	/* XXX */
    533   1.1      fvdl 	if (ss.ss_family != AF_LOCAL) {
    534   1.1      fvdl 		if (type == SOCK_STREAM)
    535   1.1      fvdl 			proto = IPPROTO_TCP;
    536   1.1      fvdl 		else if (type == SOCK_DGRAM)
    537   1.1      fvdl 			proto = IPPROTO_UDP;
    538   1.1      fvdl 		else
    539   1.1      fvdl 			return 0;
    540   1.1      fvdl 	} else
    541   1.1      fvdl 		proto = 0;
    542   1.1      fvdl 
    543   1.1      fvdl 	sip->si_af = ss.ss_family;
    544   1.1      fvdl 	sip->si_proto = proto;
    545   1.1      fvdl 	sip->si_socktype = type;
    546   1.1      fvdl 
    547   1.1      fvdl 	return 1;
    548   1.1      fvdl }
    549   1.1      fvdl 
    550   1.1      fvdl /*
    551   1.1      fvdl  * Linear search, but the number of entries is small.
    552   1.1      fvdl  */
    553   1.1      fvdl int
    554   1.1      fvdl __rpc_nconf2sockinfo(const struct netconfig *nconf, struct __rpc_sockinfo *sip)
    555   1.1      fvdl {
    556  1.11   thorpej 	size_t i;
    557   1.1      fvdl 
    558   1.5     lukem 	_DIAGASSERT(nconf != NULL);
    559   1.5     lukem 	_DIAGASSERT(sip != NULL);
    560   1.5     lukem 
    561   1.1      fvdl 	for (i = 0; i < (sizeof na_cvt) / (sizeof (struct netid_af)); i++)
    562   1.1      fvdl 		if (!strcmp(na_cvt[i].netid, nconf->nc_netid)) {
    563   1.1      fvdl 			sip->si_af = na_cvt[i].af;
    564   1.1      fvdl 			sip->si_proto = na_cvt[i].protocol;
    565   1.1      fvdl 			sip->si_socktype =
    566   1.3  christos 			    __rpc_seman2socktype((int)nconf->nc_semantics);
    567   1.1      fvdl 			if (sip->si_socktype == -1)
    568   1.1      fvdl 				return 0;
    569   1.1      fvdl 			sip->si_alen = __rpc_get_a_size(sip->si_af);
    570   1.1      fvdl 			return 1;
    571   1.1      fvdl 		}
    572   1.1      fvdl 
    573   1.1      fvdl 	return 0;
    574   1.1      fvdl }
    575   1.1      fvdl 
    576   1.1      fvdl int
    577   1.1      fvdl __rpc_nconf2fd(const struct netconfig *nconf)
    578   1.1      fvdl {
    579   1.1      fvdl 	struct __rpc_sockinfo si;
    580   1.1      fvdl 
    581   1.5     lukem 	_DIAGASSERT(nconf != NULL);
    582   1.5     lukem 
    583   1.1      fvdl 	if (!__rpc_nconf2sockinfo(nconf, &si))
    584   1.1      fvdl 		return 0;
    585   1.1      fvdl 
    586   1.1      fvdl 	return socket(si.si_af, si.si_socktype, si.si_proto);
    587   1.1      fvdl }
    588   1.1      fvdl 
    589   1.1      fvdl int
    590   1.1      fvdl __rpc_sockinfo2netid(struct __rpc_sockinfo *sip, const char **netid)
    591   1.1      fvdl {
    592  1.11   thorpej 	size_t i;
    593   1.1      fvdl 
    594   1.5     lukem 	_DIAGASSERT(sip != NULL);
    595   1.5     lukem 	/* netid may be NULL */
    596   1.5     lukem 
    597   1.1      fvdl 	for (i = 0; i < (sizeof na_cvt) / (sizeof (struct netid_af)); i++)
    598   1.1      fvdl 		if (na_cvt[i].af == sip->si_af &&
    599   1.1      fvdl 		    na_cvt[i].protocol == sip->si_proto) {
    600   1.1      fvdl 			if (netid)
    601   1.1      fvdl 				*netid = na_cvt[i].netid;
    602   1.1      fvdl 			return 1;
    603   1.1      fvdl 		}
    604   1.1      fvdl 
    605   1.1      fvdl 	return 0;
    606   1.1      fvdl }
    607   1.1      fvdl 
    608   1.1      fvdl char *
    609   1.1      fvdl taddr2uaddr(const struct netconfig *nconf, const struct netbuf *nbuf)
    610   1.1      fvdl {
    611   1.1      fvdl 	struct __rpc_sockinfo si;
    612   1.1      fvdl 
    613   1.5     lukem 	_DIAGASSERT(nconf != NULL);
    614   1.5     lukem 	_DIAGASSERT(nbuf != NULL);
    615   1.5     lukem 
    616   1.1      fvdl 	if (!__rpc_nconf2sockinfo(nconf, &si))
    617   1.1      fvdl 		return NULL;
    618   1.1      fvdl 	return __rpc_taddr2uaddr_af(si.si_af, nbuf);
    619   1.1      fvdl }
    620   1.1      fvdl 
    621   1.1      fvdl struct netbuf *
    622   1.1      fvdl uaddr2taddr(const struct netconfig *nconf, const char *uaddr)
    623   1.1      fvdl {
    624   1.1      fvdl 	struct __rpc_sockinfo si;
    625   1.5     lukem 
    626   1.5     lukem 	_DIAGASSERT(nconf != NULL);
    627   1.5     lukem 	_DIAGASSERT(uaddr != NULL);
    628   1.1      fvdl 
    629   1.1      fvdl 	if (!__rpc_nconf2sockinfo(nconf, &si))
    630   1.1      fvdl 		return NULL;
    631   1.1      fvdl 	return __rpc_uaddr2taddr_af(si.si_af, uaddr);
    632   1.1      fvdl }
    633   1.1      fvdl 
    634   1.1      fvdl char *
    635   1.1      fvdl __rpc_taddr2uaddr_af(int af, const struct netbuf *nbuf)
    636   1.1      fvdl {
    637   1.1      fvdl 	char *ret;
    638   1.9     lukem 	struct sockaddr_in *sinp;
    639   1.1      fvdl 	struct sockaddr_un *sun;
    640   1.1      fvdl 	char namebuf[INET_ADDRSTRLEN];
    641   1.1      fvdl #ifdef INET6
    642   1.1      fvdl 	struct sockaddr_in6 *sin6;
    643   1.1      fvdl 	char namebuf6[INET6_ADDRSTRLEN];
    644   1.1      fvdl #endif
    645   1.1      fvdl 	u_int16_t port;
    646   1.1      fvdl 
    647   1.5     lukem 	_DIAGASSERT(nbuf != NULL);
    648   1.5     lukem 
    649   1.1      fvdl 	switch (af) {
    650   1.1      fvdl 	case AF_INET:
    651   1.9     lukem 		sinp = nbuf->buf;
    652  1.25  christos 		if (inet_ntop(af, &sinp->sin_addr, namebuf,
    653  1.25  christos 		    (socklen_t)sizeof namebuf) == NULL)
    654   1.1      fvdl 			return NULL;
    655   1.9     lukem 		port = ntohs(sinp->sin_port);
    656   1.3  christos 		if (asprintf(&ret, "%s.%u.%u", namebuf, ((u_int32_t)port) >> 8,
    657   1.3  christos 		    port & 0xff) < 0)
    658   1.1      fvdl 			return NULL;
    659   1.1      fvdl 		break;
    660   1.1      fvdl #ifdef INET6
    661   1.1      fvdl 	case AF_INET6:
    662   1.1      fvdl 		sin6 = nbuf->buf;
    663  1.25  christos 		if (inet_ntop(af, &sin6->sin6_addr, namebuf6,
    664  1.25  christos 		    (socklen_t)sizeof namebuf6) == NULL)
    665   1.1      fvdl 			return NULL;
    666   1.1      fvdl 		port = ntohs(sin6->sin6_port);
    667   1.3  christos 		if (asprintf(&ret, "%s.%u.%u", namebuf6, ((u_int32_t)port) >> 8,
    668   1.3  christos 		    port & 0xff) < 0)
    669   1.1      fvdl 			return NULL;
    670   1.1      fvdl 		break;
    671   1.1      fvdl #endif
    672   1.1      fvdl 	case AF_LOCAL:
    673   1.1      fvdl 		sun = nbuf->buf;
    674   1.1      fvdl 		sun->sun_path[sizeof(sun->sun_path) - 1] = '\0'; /* safety */
    675   1.1      fvdl 		ret = strdup(sun->sun_path);
    676   1.1      fvdl 		break;
    677   1.1      fvdl 	default:
    678   1.1      fvdl 		return NULL;
    679   1.1      fvdl 	}
    680   1.1      fvdl 
    681   1.1      fvdl 	return ret;
    682   1.1      fvdl }
    683   1.1      fvdl 
    684   1.1      fvdl struct netbuf *
    685   1.1      fvdl __rpc_uaddr2taddr_af(int af, const char *uaddr)
    686   1.1      fvdl {
    687   1.1      fvdl 	struct netbuf *ret = NULL;
    688   1.1      fvdl 	char *addrstr, *p;
    689   1.1      fvdl 	unsigned port, portlo, porthi;
    690  1.25  christos 	size_t len;
    691   1.9     lukem 	struct sockaddr_in *sinp;
    692   1.1      fvdl #ifdef INET6
    693   1.1      fvdl 	struct sockaddr_in6 *sin6;
    694   1.1      fvdl #endif
    695   1.1      fvdl 	struct sockaddr_un *sun;
    696   1.1      fvdl 
    697   1.5     lukem 	_DIAGASSERT(uaddr != NULL);
    698   1.5     lukem 
    699   1.1      fvdl 	addrstr = strdup(uaddr);
    700   1.1      fvdl 	if (addrstr == NULL)
    701   1.1      fvdl 		return NULL;
    702   1.1      fvdl 
    703   1.1      fvdl 	/*
    704   1.1      fvdl 	 * AF_LOCAL addresses are expected to be absolute
    705   1.1      fvdl 	 * pathnames, anything else will be AF_INET or AF_INET6.
    706   1.1      fvdl 	 */
    707  1.19     lukem 	port = 0;
    708   1.1      fvdl 	if (*addrstr != '/') {
    709   1.1      fvdl 		p = strrchr(addrstr, '.');
    710   1.1      fvdl 		if (p == NULL)
    711   1.1      fvdl 			goto out;
    712   1.1      fvdl 		portlo = (unsigned)atoi(p + 1);
    713   1.1      fvdl 		*p = '\0';
    714   1.1      fvdl 
    715   1.1      fvdl 		p = strrchr(addrstr, '.');
    716   1.1      fvdl 		if (p == NULL)
    717   1.1      fvdl 			goto out;
    718   1.1      fvdl 		porthi = (unsigned)atoi(p + 1);
    719   1.1      fvdl 		*p = '\0';
    720   1.1      fvdl 		port = (porthi << 8) | portlo;
    721   1.1      fvdl 	}
    722   1.1      fvdl 
    723  1.23  christos 	ret = malloc(sizeof(*ret));
    724   1.8  kristerw 	if (ret == NULL)
    725   1.8  kristerw 		goto out;
    726   1.1      fvdl 
    727   1.1      fvdl 	switch (af) {
    728   1.1      fvdl 	case AF_INET:
    729  1.23  christos 		sinp = malloc(sizeof(*sinp));
    730   1.9     lukem 		if (sinp == NULL)
    731   1.1      fvdl 			goto out;
    732   1.9     lukem 		memset(sinp, 0, sizeof *sinp);
    733   1.9     lukem 		sinp->sin_family = AF_INET;
    734   1.9     lukem 		sinp->sin_port = htons(port);
    735   1.9     lukem 		if (inet_pton(AF_INET, addrstr, &sinp->sin_addr) <= 0) {
    736   1.9     lukem 			free(sinp);
    737   1.1      fvdl 			free(ret);
    738   1.1      fvdl 			ret = NULL;
    739   1.1      fvdl 			goto out;
    740   1.1      fvdl 		}
    741   1.9     lukem 		sinp->sin_len = ret->maxlen = ret->len = sizeof *sinp;
    742   1.9     lukem 		ret->buf = sinp;
    743   1.1      fvdl 		break;
    744   1.1      fvdl #ifdef INET6
    745   1.1      fvdl 	case AF_INET6:
    746  1.23  christos 		sin6 = malloc(sizeof(*sin6));
    747   1.1      fvdl 		if (sin6 == NULL)
    748   1.1      fvdl 			goto out;
    749   1.1      fvdl 		memset(sin6, 0, sizeof *sin6);
    750   1.1      fvdl 		sin6->sin6_family = AF_INET6;
    751   1.1      fvdl 		sin6->sin6_port = htons(port);
    752   1.1      fvdl 		if (inet_pton(AF_INET6, addrstr, &sin6->sin6_addr) <= 0) {
    753   1.8  kristerw 			free(sin6);
    754   1.1      fvdl 			free(ret);
    755   1.1      fvdl 			ret = NULL;
    756   1.1      fvdl 			goto out;
    757   1.1      fvdl 		}
    758   1.1      fvdl 		sin6->sin6_len = ret->maxlen = ret->len = sizeof *sin6;
    759   1.1      fvdl 		ret->buf = sin6;
    760   1.1      fvdl 		break;
    761   1.1      fvdl #endif
    762   1.1      fvdl 	case AF_LOCAL:
    763  1.23  christos 		sun = malloc(sizeof(*sun));
    764   1.1      fvdl 		if (sun == NULL)
    765   1.1      fvdl 			goto out;
    766   1.1      fvdl 		memset(sun, 0, sizeof *sun);
    767   1.1      fvdl 		sun->sun_family = AF_LOCAL;
    768   1.1      fvdl 		strncpy(sun->sun_path, addrstr, sizeof(sun->sun_path) - 1);
    769  1.25  christos 		len = SUN_LEN(sun);
    770  1.25  christos 		_DIAGASSERT(__type_fit(uint8_t, len));
    771  1.25  christos 		ret->len = ret->maxlen = sun->sun_len = (uint8_t)len;
    772   1.7      fvdl 		ret->buf = sun;
    773   1.3  christos 		break;
    774   1.1      fvdl 	default:
    775   1.1      fvdl 		break;
    776   1.1      fvdl 	}
    777   1.1      fvdl out:
    778   1.1      fvdl 	free(addrstr);
    779   1.1      fvdl 	return ret;
    780   1.1      fvdl }
    781   1.1      fvdl 
    782   1.1      fvdl int
    783   1.1      fvdl __rpc_seman2socktype(int semantics)
    784   1.1      fvdl {
    785   1.1      fvdl 	switch (semantics) {
    786   1.1      fvdl 	case NC_TPI_CLTS:
    787   1.1      fvdl 		return SOCK_DGRAM;
    788   1.1      fvdl 	case NC_TPI_COTS_ORD:
    789   1.1      fvdl 		return SOCK_STREAM;
    790   1.1      fvdl 	case NC_TPI_RAW:
    791   1.1      fvdl 		return SOCK_RAW;
    792   1.1      fvdl 	default:
    793   1.1      fvdl 		break;
    794   1.1      fvdl 	}
    795   1.1      fvdl 
    796   1.1      fvdl 	return -1;
    797   1.1      fvdl }
    798   1.1      fvdl 
    799   1.1      fvdl int
    800   1.1      fvdl __rpc_socktype2seman(int socktype)
    801   1.1      fvdl {
    802   1.1      fvdl 	switch (socktype) {
    803   1.1      fvdl 	case SOCK_DGRAM:
    804   1.1      fvdl 		return NC_TPI_CLTS;
    805   1.1      fvdl 	case SOCK_STREAM:
    806   1.1      fvdl 		return NC_TPI_COTS_ORD;
    807   1.1      fvdl 	case SOCK_RAW:
    808   1.1      fvdl 		return NC_TPI_RAW;
    809   1.1      fvdl 	default:
    810   1.1      fvdl 		break;
    811   1.1      fvdl 	}
    812   1.1      fvdl 
    813   1.1      fvdl 	return -1;
    814   1.1      fvdl }
    815   1.1      fvdl 
    816   1.1      fvdl /*
    817   1.1      fvdl  * XXXX - IPv6 scope IDs can't be handled in universal addresses.
    818   1.1      fvdl  * Here, we compare the original server address to that of the RPC
    819   1.1      fvdl  * service we just received back from a call to rpcbind on the remote
    820   1.1      fvdl  * machine. If they are both "link local" or "site local", copy
    821   1.1      fvdl  * the scope id of the server address over to the service address.
    822   1.1      fvdl  */
    823  1.17     lukem /* ARGSUSED */
    824   1.1      fvdl int
    825   1.1      fvdl __rpc_fixup_addr(struct netbuf *new, const struct netbuf *svc)
    826   1.1      fvdl {
    827   1.1      fvdl #ifdef INET6
    828   1.1      fvdl 	struct sockaddr *sa_new, *sa_svc;
    829   1.1      fvdl 	struct sockaddr_in6 *sin6_new, *sin6_svc;
    830   1.5     lukem 
    831   1.5     lukem 	_DIAGASSERT(new != NULL);
    832   1.5     lukem 	_DIAGASSERT(svc != NULL);
    833   1.1      fvdl 
    834   1.1      fvdl 	sa_svc = (struct sockaddr *)svc->buf;
    835   1.1      fvdl 	sa_new = (struct sockaddr *)new->buf;
    836   1.1      fvdl 
    837   1.1      fvdl 	if (sa_new->sa_family == sa_svc->sa_family &&
    838   1.1      fvdl 	    sa_new->sa_family == AF_INET6) {
    839   1.1      fvdl 		sin6_new = (struct sockaddr_in6 *)new->buf;
    840   1.1      fvdl 		sin6_svc = (struct sockaddr_in6 *)svc->buf;
    841   1.1      fvdl 
    842   1.1      fvdl 		if ((IN6_IS_ADDR_LINKLOCAL(&sin6_new->sin6_addr) &&
    843   1.1      fvdl 		     IN6_IS_ADDR_LINKLOCAL(&sin6_svc->sin6_addr)) ||
    844   1.1      fvdl 		    (IN6_IS_ADDR_SITELOCAL(&sin6_new->sin6_addr) &&
    845   1.1      fvdl 		     IN6_IS_ADDR_SITELOCAL(&sin6_svc->sin6_addr))) {
    846   1.1      fvdl 			sin6_new->sin6_scope_id = sin6_svc->sin6_scope_id;
    847   1.1      fvdl 		}
    848   1.1      fvdl 	}
    849   1.1      fvdl #endif
    850   1.1      fvdl 	return 1;
    851   1.1      fvdl }
    852   1.1      fvdl 
    853   1.1      fvdl int
    854   1.1      fvdl __rpc_sockisbound(int fd)
    855   1.1      fvdl {
    856   1.1      fvdl 	struct sockaddr_storage ss;
    857   1.1      fvdl 	socklen_t slen;
    858   1.1      fvdl 
    859   1.1      fvdl 	slen = sizeof (struct sockaddr_storage);
    860   1.3  christos 	if (getsockname(fd, (struct sockaddr *)(void *)&ss, &slen) < 0)
    861   1.1      fvdl 		return 0;
    862   1.1      fvdl 
    863   1.1      fvdl 	switch (ss.ss_family) {
    864   1.1      fvdl 		case AF_INET:
    865   1.3  christos 			return (((struct sockaddr_in *)
    866   1.3  christos 			    (void *)&ss)->sin_port != 0);
    867   1.1      fvdl #ifdef INET6
    868   1.1      fvdl 		case AF_INET6:
    869   1.3  christos 			return (((struct sockaddr_in6 *)
    870   1.3  christos 			    (void *)&ss)->sin6_port != 0);
    871   1.1      fvdl #endif
    872   1.1      fvdl 		case AF_LOCAL:
    873   1.1      fvdl 			/* XXX check this */
    874   1.3  christos 			return (((struct sockaddr_un *)
    875   1.3  christos 			    (void *)&ss)->sun_path[0] != '\0');
    876   1.1      fvdl 		default:
    877   1.1      fvdl 			break;
    878   1.1      fvdl 	}
    879   1.1      fvdl 
    880   1.1      fvdl 	return 0;
    881   1.1      fvdl }
    882  1.22  christos 
    883  1.22  christos /*
    884  1.22  christos  * For TCP transport, Host Requirements RFCs mandate
    885  1.22  christos  * Nagle (RFC-896) processing.  But for RPC, Nagle
    886  1.22  christos  * processing adds adds unwanted latency to the last,
    887  1.22  christos  * partial TCP segment of each RPC message. See:
    888  1.22  christos  *   R. W. Scheifler and J. Gettys, The X Window System,
    889  1.22  christos  *   ACM Transactions on Graphics 16:8 (Aug. 1983), pp. 57-69.
    890  1.22  christos  * So for TCP transport, disable Nagle via TCP_NODELAY.
    891  1.22  christos  * XXX: moral equivalent for non-TCP protocols?
    892  1.22  christos  */
    893  1.22  christos int
    894  1.22  christos __rpc_setnodelay(int fd, const struct __rpc_sockinfo *si)
    895  1.22  christos {
    896  1.22  christos 	int one = 1;
    897  1.22  christos 	if (si->si_proto != IPPROTO_TCP)
    898  1.22  christos 		return 0;
    899  1.25  christos 	return setsockopt(fd, si->si_proto, TCP_NODELAY, &one,
    900  1.25  christos 	    (socklen_t)sizeof(one));
    901  1.22  christos }
    902