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/*
* kadmin/server/adm_network.c
*
* Copyright 1988 by the Massachusetts Institute of Technology.
*
* For copying and distribution information, please see the file
* <mit-copyright.h>.
*
* Network Initialization/Shutdown Component of the
* Version 5 Administration network
*/
/*
* Sandia National Laboratories also makes no representations about the
* suitability of the modifications, or additions to this software for
* any purpose. It is provided "as is" without express or implied warranty.
*/
/*
* adm_network.c
*/
#include <stdio.h>
#include "com_err.h"
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/param.h>
#include <signal.h>
#ifndef sigmask
#define sigmask(m) (1 <<((m)-1))
#endif
#include <sys/socket.h>
#include <netinet/in.h>
#ifndef hpux
#include <arpa/inet.h>
#endif
#include <netdb.h>
#include "k5-int.h"
#include "adm_extern.h"
extern int errno;
#ifdef POSIX_SIGTYPE
#define SIGNAL_RETURN return
#else
#define SIGNAL_RETURN return(0)
#endif
krb5_error_code
closedown_network(prog)
const char *prog;
{
if (client_server_info.server_socket == -1) return(1);
(void) close(client_server_info.server_socket);
client_server_info.server_socket = -1;
return(0);
}
krb5_sigtype
doexit()
{
exit_now = 1;
SIGNAL_RETURN;
}
/*
* SIGCHLD brings us here
*/
krb5_sigtype
do_child()
{
/*
* <sys/param.h> has been included, so BSD will be defined on
* BSD systems
*/
#if BSD > 0 && BSD <= 43
#ifndef WEXITSTATUS
#define WEXITSTATUS(w) (w).w_retcode
#define WTERMSIG(w) (w).w_termsig
#endif
union wait status;
#else
int status;
#endif
int pid, i, j;
#ifdef OLD_SIGNALS
signal(SIGCHLD, do_child);
#endif
pid = wait(&status);
if (pid < 0)
SIGNAL_RETURN;
for (i = 0; i < pidarraysize; i++)
if (pidarray[i] == pid) {
/* found it */
for (j = i; j < pidarraysize-1; j++)
/* copy others down */
pidarray[j] = pidarray[j+1];
pidarraysize--;
if ( !WIFEXITED(status) ) {
com_err("adm_network", 0, "child %d: termsig %d",
pid, WTERMSIG(status) );
com_err("adm_network", 0, "retcode %d",
WEXITSTATUS(status));
}
SIGNAL_RETURN;
}
com_err("adm_network", 0,
"child %d not in list: termsig %d, retcode %d", pid,
WTERMSIG(status), WEXITSTATUS(status));
SIGNAL_RETURN;
}
krb5_error_code
setup_network(context, prog)
krb5_context context;
const char *prog;
{
krb5_error_code retval;
char server_host_name[MAXHOSTNAMELEN];
krb5_sigtype doexit(), do_child();
struct servent *service_servent;
struct hostent *service_hostent;
int on = 1;
#ifndef OLD_SIGNALS
struct sigaction new_act;
new_act.sa_handler = doexit;
sigemptyset(&new_act.sa_mask);
sigaction(SIGINT, &new_act, 0);
sigaction(SIGTERM, &new_act, 0);
sigaction(SIGHUP, &new_act, 0);
sigaction(SIGQUIT, &new_act, 0);
sigaction(SIGALRM, &new_act, 0);
new_act.sa_handler = SIG_IGN;
sigaction(SIGPIPE, &new_act, 0);
new_act.sa_handler = do_child;
sigaction(SIGCHLD, &new_act, 0);
#else
signal(SIGINT, doexit);
signal(SIGTERM, doexit);
signal(SIGHUP, doexit);
signal(SIGQUIT, doexit);
signal(SIGPIPE, SIG_IGN); /* get errors on write() */
signal(SIGALRM, doexit);
signal(SIGCHLD, do_child);
#endif
client_server_info.name_of_service = malloc(768);
if (!client_server_info.name_of_service) {
com_err("setup_network", 0,
"adm_network: No Memory for name_of_service");
return ENOMEM;
}
(void) sprintf(client_server_info.name_of_service, "%s%s%s%s%s",
CPWNAME, "/", realm, "@", realm);
#ifdef DEBUG
fprintf(stderr, "client_server_info.name_of_service = %s\n",
client_server_info.name_of_service);
#endif /* DEBUG */
if ((retval = krb5_parse_name(context, client_server_info.name_of_service,
&client_server_info.server))) {
free(client_server_info.name_of_service);
com_err( "setup_network", retval,
"adm_network: Unable to Parse Server Name");
return retval;
}
if (gethostname(server_host_name, sizeof(server_host_name))) {
retval = errno;
krb5_free_principal(context, client_server_info.server);
free(client_server_info.name_of_service);
com_err( "setup_network", retval,
"adm_network: Unable to Identify Who I am");
return retval;
}
service_hostent = gethostbyname(server_host_name);
if (!service_hostent) {
retval = errno;
free(client_server_info.name_of_service);
com_err("setup_network", retval, "adm_network: Failed gethostname");
return retval;
}
#ifdef DEBUG
fprintf(stderr, "Official host name = %s\n", service_hostent->h_name);
#endif /* DEBUG */
client_server_info.server_name.sin_family = AF_INET;
#ifdef unicos61
memcpy((char *) &client_server_info.server_name.sin_addr,
(char *) service_hostent->h_addr, service_hostent->h_length);
#else
memcpy((char *) &client_server_info.server_name.sin_addr.s_addr,
(char *) service_hostent->h_addr, service_hostent->h_length);
#endif /* unicos61 */
client_server_info.server_socket = -1;
#ifdef DEBUG
fprintf(stderr, "adm5_tcp_portname = %s\n", adm5_tcp_portname);
#endif /* DEBUG */
service_servent = getservbyname(adm5_tcp_portname, "tcp");
if (admin_port) {
client_server_info.server_name.sin_port = admin_port;
} else if (service_servent) {
client_server_info.server_name.sin_port = service_servent->s_port;
#ifdef DEBUG
fprintf(stderr, "Official service name = %s\n", service_servent->s_name);
#endif /* DEBUG */
} else {
#ifdef ADM5_DEFAULT_PORT
client_server_info.server_name.sin_port = htons(ADM5_DEFAULT_PORT);
com_err("setup_network", 0, "adm_network: using default port %d",
ADM5_DEFAULT_PORT);
#else
krb5_free_principal(client_server_info.server);
free(client_server_info.name_of_service);
com_err("setup_network", 0, "adm_network: %s/tcp service unknown",
adm5_tcp_portname);
return(1);
#endif
}
if ((client_server_info.server_socket =
socket(AF_INET, SOCK_STREAM, 0)) < 0) {
retval = errno;
krb5_free_principal(context, client_server_info.server);
free(client_server_info.name_of_service);
com_err("setup_network", retval,
"adm_network: Cannot create server socket.");
return(1);
}
#ifdef DEBUG
fprintf(stderr, "Socket File Descriptor = %d\n",
client_server_info.server_socket);
fprintf(stderr, "sin_family = %d\n",
client_server_info.server_name.sin_family);
fprintf(stderr, "sin_port = %d\n",
client_server_info.server_name.sin_port);
fprintf(stderr, "in_addr.s_addr = %s\n",
inet_ntoa( client_server_info.server_name.sin_addr ));
#endif /* DEBUG */
if (admin_port && admin_port != htons(ADM5_DEFAULT_PORT)) {
(void) setsockopt(client_server_info.server_socket, SOL_SOCKET,
SO_REUSEADDR, (char *)&on, sizeof(on));
}
if (bind(client_server_info.server_socket,
(struct sockaddr *) &client_server_info.server_name,
sizeof(client_server_info.server_name)) < 0) {
retval = errno;
krb5_free_principal(context, client_server_info.server);
free(client_server_info.name_of_service);
com_err("setup_network", retval,
"adm_network: Cannot bind server socket.");
return(1);
}
return(0);
}
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