#if 0
static char rcsid [] = "!Header: gnuslib.c,v 2.4 95/02/16 11:57:37 arup alpha !";
#endif
#include "gnuserv.h"
#include <errno.h>
#ifdef SYSV_IPC
static int connect_to_ipc_server (void);
#endif
#ifdef UNIX_DOMAIN_SOCKETS
static int connect_to_unix_server (void);
#endif
#ifdef INTERNET_DOMAIN_SOCKETS
static int connect_to_internet_server (char *serverhost, u_short port);
#endif
#ifdef HAVE_BROKEN_INET_ADDR
# define IN_ADDR struct in_addr
# define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1)
#else
# if (LONGBITS > 32)
# define IN_ADDR unsigned int
# else
# define IN_ADDR unsigned long
# endif
# define NUMERIC_ADDR_ERROR (numeric_addr == (IN_ADDR) -1)
#endif
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include <arpa/inet.h>
char *tmpdir = NULL;
char *progname = NULL;
int
make_connection (char *hostarg, int portarg, int *s)
{
#ifdef INTERNET_DOMAIN_SOCKETS
char *ptr;
if (hostarg == NULL)
hostarg = getenv("GNU_HOST");
if (portarg == 0 && (ptr=getenv("GNU_PORT")) != NULL)
portarg = atoi(ptr);
#endif
if (hostarg != NULL) {
#ifdef UNIX_DOMAIN_SOCKETS
if (!strcmp(hostarg, "unix")) {
*s = connect_to_unix_server();
return (int) CONN_UNIX;
}
#endif
#ifdef INTERNET_DOMAIN_SOCKETS
*s = connect_to_internet_server(hostarg, portarg);
return (int) CONN_INTERNET;
#endif
#ifdef SYSV_IPC
return -1;
#endif
} else {
#if defined(UNIX_DOMAIN_SOCKETS)
*s = connect_to_unix_server();
return (int) CONN_UNIX;
#elif defined(SYSV_IPC)
*s = connect_to_ipc_server();
return (int) CONN_IPC;
#elif defined(INTERNET_DOMAIN_SOCKETS)
{
char localhost[HOSTNAMSZ];
gethostname(localhost,HOSTNAMSZ);
*s = connect_to_internet_server(localhost, portarg);
return (int) CONN_INTERNET;
}
#endif
}
}
#ifdef SYSV_IPC
static int
connect_to_ipc_server (void)
{
int s;
key_t key;
char buf[GSERV_BUFSZ+1];
sprintf(buf,"%s/gsrv%d",tmpdir,(int)geteuid());
creat(buf,0600);
if ((key = ftok(buf,1)) == -1) {
perror(progname);
fprintf(stderr, "%s: unable to get ipc key from %s\n",
progname, buf);
exit(1);
}
if ((s = msgget(key,0600)) == -1) {
perror(progname);
fprintf(stderr,"%s: unable to access msg queue\n",progname);
exit(1);
};
return(s);
}
void
disconnect_from_ipc_server (int s, struct msgbuf *msgp, int echo)
{
int len;
send_string(s,EOT_STR);
msgp->mtype = 1;
if(msgsnd(s,msgp,strlen(msgp->mtext)+1,0) < 0) {
perror(progname);
fprintf(stderr,"%s: unable to send message to server\n",progname);
exit(1);
};
if((len = msgrcv(s,msgp,GSERV_BUFSZ,getpid(),0)) < 0) {
perror(progname);
fprintf(stderr,"%s: unable to receive message from server\n",progname);
exit(1);
};
if (echo) {
msgp->mtext[len] = '\0';
fputs(msgp->mtext, stdout);
if (msgp->mtext[len-1] != '\n') putchar ('\n');
};
}
#endif
#if defined(INTERNET_DOMAIN_SOCKETS) || defined(UNIX_DOMAIN_SOCKETS)
void
send_string (int s, const char *msg)
{
#if 0
if (send(s,msg,strlen(msg),0) < 0) {
perror(progname);
fprintf(stderr,"%s: unable to send\n",progname);
exit(1);
};
#else
int len, left=strlen(msg);
while (left > 0) {
if ((len=write(s,msg,min2(left,GSERV_BUFSZ))) < 0) {
if (errno == EPIPE) {
return ;
}
perror(progname);
fprintf(stderr,"%s: unable to send\n",progname);
exit(1);
};
left -= len;
msg += len;
};
#endif
}
#endif
int
read_line (int s, char *dest)
{
int length;
int offset=0;
char buffer[GSERV_BUFSZ+1];
while ((length=read(s,buffer+offset,1)>0) && buffer[offset]!='\n'
&& buffer[offset] != EOT_CHR) {
offset += length;
if (offset >= GSERV_BUFSZ)
break;
}
buffer[offset] = '\0';
strcpy(dest,buffer);
return 1;
}
#ifdef UNIX_DOMAIN_SOCKETS
static int
connect_to_unix_server (void)
{
int s;
struct sockaddr_un server;
if ((s = socket(AF_UNIX,SOCK_STREAM,0)) < 0) {
perror(progname);
fprintf(stderr,"%s: unable to create socket\n",progname);
exit(1);
};
server.sun_family = AF_UNIX;
#ifdef HIDE_UNIX_SOCKET
sprintf(server.sun_path,"%s/gsrvdir%d/gsrv",tmpdir,(int)geteuid());
#else
sprintf(server.sun_path,"%s/gsrv%d",tmpdir,(int)geteuid());
#endif
if (connect(s,(struct sockaddr *)&server,strlen(server.sun_path)+2) < 0) {
perror(progname);
fprintf(stderr,"%s: unable to connect to local\n",progname);
exit(1);
};
return(s);
}
#endif
#ifdef INTERNET_DOMAIN_SOCKETS
int
internet_addr (char *host)
{
struct hostent *hp;
IN_ADDR numeric_addr;
numeric_addr = inet_addr(host);
if (!NUMERIC_ADDR_ERROR)
return numeric_addr;
else if ((hp = gethostbyname(host)) != NULL)
return ((struct in_addr *)(hp->h_addr))->s_addr;
else
return -1;
}
#ifdef AUTH_MAGIC_COOKIE
# include <X11/X.h>
# include <X11/Xauth.h>
static Xauth *server_xauth = NULL;
#endif
static int
connect_to_internet_server (char *serverhost, u_short port)
{
int s;
struct servent *sp;
struct sockaddr_in peeraddr_in;
char buf[512];
memset((char *)&peeraddr_in,0,sizeof(struct sockaddr_in));
peeraddr_in.sin_family = AF_INET;
if ((peeraddr_in.sin_addr.s_addr = internet_addr(serverhost)) == -1) {
fprintf(stderr,"%s: unable to find %s in /etc/hosts or from YP\n",
progname,serverhost);
exit(1);
};
if (port == 0) {
if ((sp = getservbyname ("gnuserv","tcp")) == NULL)
peeraddr_in.sin_port = htons(DEFAULT_PORT+getuid());
else
peeraddr_in.sin_port = sp->s_port;
}
else
peeraddr_in.sin_port = htons(port);
if ((s = socket (AF_INET,SOCK_STREAM, 0))== -1) {
perror(progname);
fprintf(stderr,"%s: unable to create socket\n",progname);
exit(1);
};
if (connect(s, (struct sockaddr *)&peeraddr_in,
sizeof(struct sockaddr_in)) == -1) {
perror(progname);
fprintf(stderr, "%s: unable to connect to remote\n",progname);
exit(1);
};
#ifdef AUTH_MAGIC_COOKIE
server_xauth =
XauGetAuthByAddr(FamilyInternet,
sizeof(peeraddr_in.sin_addr.s_addr),
(char *) &peeraddr_in.sin_addr.s_addr,
strlen(MCOOKIE_SCREEN), MCOOKIE_SCREEN,
strlen(MCOOKIE_X_NAME), MCOOKIE_X_NAME);
if (server_xauth && server_xauth->data) {
sprintf(buf, "%s\n%d\n", MCOOKIE_NAME, server_xauth->data_length);
write (s, buf, strlen(buf));
write (s, server_xauth->data, server_xauth->data_length);
return (s);
}
#endif
sprintf (buf, "%s\n", DEFAUTH_NAME);
write (s, buf, strlen(buf));
return(s);
}
#endif
#if defined(INTERNET_DOMAIN_SOCKETS) || defined(UNIX_DOMAIN_SOCKETS)
void
disconnect_from_server (int s, int echo)
{
#if 0
char buffer[REPLYSIZ+1];
#else
char buffer[GSERV_BUFSZ+1];
#endif
int add_newline = 1;
int length;
send_string(s,EOT_STR);
#if !defined (linux) && !defined (_SCO_DS)
if (shutdown(s,1) == -1) {
perror(progname);
fprintf(stderr, "%s: unable to shutdown socket\n",progname);
exit(1);
};
#endif
#if 0
while((length = recv(s,buffer,REPLYSIZ,0)) > 0) {
buffer[length] = '\0';
if (echo) fputs(buffer,stdout);
add_newline = (buffer[length-1] != '\n');
};
#else
while ((length = read(s,buffer,GSERV_BUFSZ)) > 0 ||
(length == -1 && errno == EINTR)) {
if (length) {
buffer[length] = '\0';
if (echo) {
fputs(buffer,stdout);
add_newline = (buffer[length-1] != '\n');
};
};
};
#endif
if (echo && add_newline) putchar('\n');
if(length < 0) {
perror(progname);
fprintf(stderr,"%s: unable to read the reply from the server\n",progname);
exit(1);
};
}
#endif