1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154
|
/* This file is part of the Project Athena Zephyr Notification System.
* It contains source for the ZInitialize function.
*
* Created by: Robert French
*
* Copyright (c) 1987, 1991 by the Massachusetts Institute of Technology.
* For copying and distribution information, see the file
* "mit-copyright.h".
*/
#ifdef ZEPHYR_USES_KERBEROS
#ifdef WIN32
#else
#include <krb_err.h>
#endif
#endif
#include "internal.h"
#ifdef WIN32
#include <winsock2.h>
#else
#include <sys/socket.h>
#endif
#ifndef INADDR_NONE
#define INADDR_NONE 0xffffffff
#endif
Code_t ZInitialize()
{
struct servent *hmserv;
struct hostent *hostent;
char addr[4], hostname[MAXHOSTNAMELEN];
struct in_addr servaddr;
struct sockaddr_in sin;
int s;
socklen_t sinsize = sizeof(sin);
Code_t code;
ZNotice_t notice;
#ifdef ZEPHYR_USES_KERBEROS
char *krealm = NULL;
int krbval;
char d1[ANAME_SZ], d2[INST_SZ];
/* initialize_krb_error_table(); */
#endif
initialize_zeph_error_table();
(void) memset((char *)&__HM_addr, 0, sizeof(__HM_addr));
__HM_addr.sin_family = AF_INET;
/* Set up local loopback address for HostManager */
addr[0] = 127;
addr[1] = 0;
addr[2] = 0;
addr[3] = 1;
hmserv = (struct servent *)getservbyname(HM_SVCNAME, "udp");
__HM_addr.sin_port = (hmserv) ? hmserv->s_port : HM_SVC_FALLBACK;
(void) memcpy((char *)&__HM_addr.sin_addr, addr, 4);
__HM_set = 0;
/* Initialize the input queue */
__Q_Tail = NULL;
__Q_Head = NULL;
/* if the application is a server, there might not be a zhm. The
code will fall back to something which might not be "right",
but this is is ok, since none of the servers call krb_rd_req. */
servaddr.s_addr = INADDR_NONE;
if (! __Zephyr_server) {
if ((code = ZOpenPort(NULL)) != ZERR_NONE)
return(code);
if ((code = ZhmStat(NULL, ¬ice)) != ZERR_NONE)
return(code);
ZClosePort();
/* the first field, which is NUL-terminated, is the server name.
If this code ever support a multiplexing zhm, this will have to
be made smarter, and probably per-message */
#ifdef ZEPHYR_USES_KERBEROS
krealm = krb_realmofhost(notice.z_message);
#endif
hostent = gethostbyname(notice.z_message);
if (hostent && hostent->h_addrtype == AF_INET)
memcpy(&servaddr, hostent->h_addr, sizeof(servaddr));
ZFreeNotice(¬ice);
}
#ifdef ZEPHYR_USES_KERBEROS
if (krealm) {
strcpy(__Zephyr_realm, krealm);
} else if ((krb_get_tf_fullname(TKT_FILE, d1, d2, __Zephyr_realm)
!= KSUCCESS) &&
((krbval = krb_get_lrealm(__Zephyr_realm, 1)) != KSUCCESS)) {
return (krbval);
}
#else
strcpy(__Zephyr_realm, "local-realm");
#endif
__My_addr.s_addr = INADDR_NONE;
if (servaddr.s_addr != INADDR_NONE) {
/* Try to get the local interface address by connecting a UDP
* socket to the server address and getting the local address.
* Some broken operating systems (e.g. Solaris 2.0-2.5) yield
* INADDR_ANY (zero), so we have to check for that. */
s = socket(AF_INET, SOCK_DGRAM, 0);
if (s != -1) {
memset(&sin, 0, sizeof(sin));
sin.sin_family = AF_INET;
memcpy(&sin.sin_addr, &servaddr, sizeof(servaddr));
sin.sin_port = HM_SRV_SVC_FALLBACK;
if (connect(s, (struct sockaddr *) &sin, sizeof(sin)) == 0
&& getsockname(s, (struct sockaddr *) &sin, &sinsize) == 0
&& sin.sin_addr.s_addr != 0)
memcpy(&__My_addr, &sin.sin_addr, sizeof(__My_addr));
close(s);
}
}
if (__My_addr.s_addr == INADDR_NONE) {
/* We couldn't figure out the local interface address by the
* above method. Try by resolving the local hostname. (This
* is a pretty broken thing to do, and unfortunately what we
* always do on server machines.) */
if (gethostname(hostname, sizeof(hostname)) == 0) {
hostent = gethostbyname(hostname);
if (hostent && hostent->h_addrtype == AF_INET)
memcpy(&__My_addr, hostent->h_addr, sizeof(__My_addr));
}
}
/* If the above methods failed, zero out __My_addr so things will
* sort of kind of work. */
if (__My_addr.s_addr == INADDR_NONE)
__My_addr.s_addr = 0;
/* Get the sender so we can cache it */
(void) ZGetSender();
return (ZERR_NONE);
}
|