1 /* 2 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 3 * Use is subject to license terms. 4 */ 5 6 #pragma ident "%Z%%M% %I% %E% SMI" 7 /* from kerbd_handle.c 1.3 92/01/29 SMI */ 8 9 /* 10 * kwarnd_handle.c, Interface to kwarnd 11 * 12 */ 13 14 #include <unistd.h> 15 #include <rpc/rpc.h> 16 #include <rpc/clnt.h> 17 #include <stdio.h> 18 #include <string.h> 19 #include <netconfig.h> 20 #include <sys/utsname.h> 21 #include "kwarnd.h" 22 23 #ifdef DEBUG 24 #define dprt(msg) 25 #else 26 #define dprt(msg) 27 #endif /* DEBUG */ 28 29 30 /* 31 * Keep the handle cached. This call may be made quite often. 32 */ 33 34 CLIENT * 35 getkwarnd_handle(void) 36 { 37 void *localhandle; 38 struct netconfig *nconf; 39 struct netconfig *tpconf; 40 static CLIENT *clnt; 41 struct timeval wait_time; 42 struct utsname u; 43 static char *hostname; 44 static bool_t first_time = TRUE; 45 46 #define TOTAL_TIMEOUT 1000 /* total timeout talking to kwarnd */ 47 #define TOTAL_TRIES 1 /* Number of tries */ 48 49 if (clnt) 50 return (clnt); 51 if (!(localhandle = setnetconfig())) 52 return (NULL); 53 tpconf = NULL; 54 if (first_time == TRUE) { 55 if (uname(&u) == -1) { 56 (void) endnetconfig(localhandle); 57 return ((CLIENT *)NULL); 58 } 59 if ((hostname = strdup(u.nodename)) == (char *)NULL) { 60 (void) endnetconfig(localhandle); 61 return ((CLIENT *)NULL); 62 } 63 first_time = FALSE; 64 } 65 while (nconf = getnetconfig(localhandle)) { 66 if (strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) { 67 if (nconf->nc_semantics == NC_TPI_COTS_ORD) { 68 clnt = clnt_tp_create(hostname, 69 KWARNPROG, KWARNVERS, nconf); 70 if (clnt) { 71 dprt("got COTS_ORD\n"); 72 break; 73 } 74 } else { 75 tpconf = nconf; 76 } 77 } 78 } 79 if ((clnt == NULL) && (tpconf)) { 80 81 /* Now, try the connection-oriented loopback transport */ 82 83 clnt = clnt_tp_create(hostname, KWARNPROG, KWARNVERS, tpconf); 84 #ifdef DEBUG 85 if (clnt) { 86 dprt("got COTS\n"); 87 } 88 #endif /* DEBUG */ 89 } 90 (void) endnetconfig(localhandle); 91 92 /* 93 * This bit of code uses an as yet unimplemented argument to 94 * clnt_control(). CLSET_SVC_PRIV specifies that the underlying 95 * loopback transport should be checked to ensure it is 96 * connected to a process running as root. If so, the clnt_control() 97 * call returns TRUE. If not, it returns FALSE. 98 */ 99 100 #ifdef CLSET_SVC_PRIV 101 102 if (clnt_control(clnt, CLSET_SVC_PRIV, NULL) != TRUE) { 103 clnt_destroy(clnt); 104 clnt = NULL; 105 return (NULL); 106 { 107 #endif 108 if (clnt == NULL) 109 return (NULL); 110 111 clnt->cl_auth = authsys_create("", getuid(), 0, 0, NULL); 112 if (clnt->cl_auth == NULL) { 113 clnt_destroy(clnt); 114 clnt = NULL; 115 return (NULL); 116 } 117 wait_time.tv_sec = TOTAL_TIMEOUT/TOTAL_TRIES; 118 wait_time.tv_usec = 0; 119 (void) clnt_control(clnt, CLSET_RETRY_TIMEOUT, (char *)&wait_time); 120 121 return (clnt); 122 } 123