/*
- * ipc_c_tcp.c
+ * $Id$
*
- * Citadel/UX client/server IPC - client module using TCP/IP
- *
- * version 1.3
+ * Client-side IPC functions
*
*/
-#define DEFAULT_HOST "127.0.0.1"
-#define DEFAULT_PORT "citadel"
-
#include "sysdep.h"
+#undef NDEBUG
+#include <assert.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
+#include <sys/un.h>
#include <netdb.h>
#include <string.h>
#include <pwd.h>
#include <errno.h>
+#include <stdarg.h>
+#include <libcitadel.h>
+#include "citadel.h"
+#include "citadel_ipc.h"
#include "citadel_decls.h"
-#include "ipc.h"
-
-/*
- * If server_is_local is set to nonzero, the client assumes that it is running
- * on the same computer as the server. Several things happen when this is
- * the case, including the ability to map a specific tty to a particular login
- * session in the "<W>ho is online" listing, the ability to run external
- * programs, and the ability to download files directly off the disk without
- * having to first fetch them from the server.
- * Set the flag to 1 if this IPC is local (as is the case with pipes, or a
- * network session to the local machine) or 0 if the server is executing on
- * a remote computer.
- */
-char server_is_local = 0;
-
-#ifndef INADDR_NONE
-#define INADDR_NONE 0xffffffff
+#ifndef HAVE_SNPRINTF
+#include "snprintf.h"
#endif
-int serv_sock;
-
-void timeout(int signum) {
- printf("\rConnection timed out.\n");
- logoff(3);
- }
-
-int connectsock(char *host, char *service, char *protocol)
-{
- struct hostent *phe;
- struct servent *pse;
- struct protoent *ppe;
- struct sockaddr_in sin;
- int s,type;
-
- bzero((char *)&sin,sizeof(sin));
- sin.sin_family = AF_INET;
-
- pse=getservbyname(service,protocol);
- if (pse) {
- sin.sin_port = pse->s_port;
- }
- else if ((sin.sin_port = htons((u_short)atoi(service))) == 0) {
- fprintf(stderr,"Can't get %s service entry: %s\n",
- service,strerror(errno));
- logoff(3);
- }
-
- phe=gethostbyname(host);
- if (phe) {
- memcpy(&sin.sin_addr,phe->h_addr,phe->h_length);
- }
- else if ((sin.sin_addr.s_addr = inet_addr(host))==INADDR_NONE) {
- fprintf(stderr,"Can't get %s host entry: %s\n",
- host,strerror(errno));
- logoff(3);
- }
-
- if ((ppe=getprotobyname(protocol))==0) {
- fprintf(stderr,"Can't get %s protocol entry: %s\n",
- protocol,strerror(errno));
- logoff(3);
- }
-
- if (!strcmp(protocol,"udp")) {
- type = SOCK_DGRAM;
- }
- else {
- type = SOCK_STREAM;
- }
-
- s = socket(PF_INET,type,ppe->p_proto);
- if (s<0) {
- fprintf(stderr,"Can't create socket: %s\n",strerror(errno));
- logoff(3);
- }
-
-
- signal(SIGALRM,timeout);
- alarm(30);
-
- if (connect(s,(struct sockaddr *)&sin,sizeof(sin))<0) {
- fprintf(stderr,"can't connect to %s.%s: %s\n",
- host,service,strerror(errno));
- logoff(3);
- }
-
- alarm(0);
- signal(SIGALRM,SIG_IGN);
-
- return(s);
- }
-
-/*
- * convert service and host entries into a six-byte numeric in the format
- * expected by a SOCKS v4 server
- */
-void numericize(char *buf, char *host, char *service, char *protocol)
-{
- struct hostent *phe;
- struct servent *pse;
- struct sockaddr_in sin;
-
- bzero((char *)&sin,sizeof(sin));
- sin.sin_family = AF_INET;
-
- pse=getservbyname(service,protocol);
- if (pse) {
- sin.sin_port = pse->s_port;
- }
- else if ((sin.sin_port = htons((u_short)atoi(service))) == 0) {
- fprintf(stderr,"Can't get %s service entry: %s\n",
- service,strerror(errno));
- logoff(3);
- }
-
- buf[1] = (((sin.sin_port) & 0xFF00) >> 8);
- buf[0] = ((sin.sin_port) & 0x00FF);
-
- phe=gethostbyname(host);
- if (phe) {
- memcpy(&sin.sin_addr,phe->h_addr,phe->h_length);
- }
- else if ((sin.sin_addr.s_addr = inet_addr(host))==INADDR_NONE) {
- fprintf(stderr,"Can't get %s host entry: %s\n",
- host,strerror(errno));
- logoff(3);
- }
- buf[5] = ((sin.sin_addr.s_addr) & 0xFF000000) >> 24;
- buf[4] = ((sin.sin_addr.s_addr) & 0x00FF0000) >> 16;
- buf[3] = ((sin.sin_addr.s_addr) & 0x0000FF00) >> 8;
- buf[2] = ((sin.sin_addr.s_addr) & 0x000000FF) ;
- }
-
/*
- * input binary data from socket
+ * FIXME: rewrite all of Ford's stuff here, it won't work with multiple
+ * instances
*/
-void serv_read(char *buf, int bytes)
-{
- int len,rlen;
- len = 0;
- while(len<bytes) {
- rlen = read(serv_sock,&buf[len],bytes-len);
- if (rlen<1) {
- printf("\rNetwork error - connection terminated.\n");
- printf("%s\n", strerror(errno));
- logoff(3);
- }
- len = len + rlen;
- }
- }
+static void (*deathHook)(void) = NULL;
+int (*error_printf)(char *s, ...) = (int (*)(char *, ...))printf;
+void setIPCDeathHook(void (*hook)(void)) {
+ deathHook = hook;
+}
-/*
- * send binary to server
- */
-void serv_write(char *buf, int nbytes)
-{
- int bytes_written = 0;
- int retval;
- while (bytes_written < nbytes) {
- retval = write(serv_sock, &buf[bytes_written],
- nbytes - bytes_written);
- if (retval < 1) {
- printf("\rNetwork error - connection terminated.\n");
- printf("%s\n", strerror(errno));
- logoff(3);
- }
- bytes_written = bytes_written + retval;
- }
- }
+void setIPCErrorPrintf(int (*func)(char *s, ...)) {
+ error_printf = func;
+}
+void connection_died(CtdlIPC* ipc, int using_ssl) {
+ if (deathHook != NULL)
+ deathHook();
+ error_printf("\r\nYour connection to %s is broken.\n",
+ ipc->ServInfo.humannode);
-/*
- * input string from socket - implemented in terms of serv_read()
- */
-void serv_gets(char *buf)
-{
- buf[0] = 0;
- do {
- buf[strlen(buf) + 1] = 0;
- if (strlen(buf) < 255) serv_read(&buf[strlen(buf)], 1);
- } while (buf[strlen(buf)-1] != 10);
- if (strlen(buf) > 0) buf[strlen(buf)-1] = 0;
- /* printf("> %s\n", buf); */
- }
+#ifdef HAVE_OPENSSL
+ if (using_ssl) {
+ error_printf("Last error: %s\n",
+ ERR_reason_error_string(ERR_get_error()));
+ } else
+#endif
+ error_printf("Last error: %s\n", strerror(errno));
+ error_printf("Please re-connect and log in again.\n");
+ fflush(stderr);
+ fflush(stdout);
-/*
- * send line to server - implemented in terms of serv_write()
- */
-void serv_puts(char *buf)
-{
- /* printf("< %s\n", buf); */
- serv_write(buf, strlen(buf));
- serv_write("\n", 1);
- }
+#ifdef HAVE_OPENSSL
+ SSL_free(ipc->ssl);
+ ipc->ssl = NULL;
+#endif
+ shutdown(ipc->sock, 2);
+ ipc->sock = -1;
+ printf ("About to exit because of dead socket.\n");
+ exit (1);
+}
/*
- * attach to server
- */
-void attach_to_server(int argc, char **argv)
+static void ipc_timeout(int signum)
{
- int a;
- char cithost[256]; int host_copied = 0;
- char citport[256]; int port_copied = 0;
- char socks4[256];
- char buf[256];
- struct passwd *p;
-
- strcpy(cithost,DEFAULT_HOST); /* default host */
- strcpy(citport,DEFAULT_PORT); /* default port */
- strcpy(socks4,""); /* SOCKS v4 server */
-
- for (a = 0; a < argc; ++a) {
- if (a == 0) {
- /* do nothing */
- }
- else if (!strcmp(argv[a],"-s")) {
- strcpy(socks4,argv[++a]);
- }
- else if (host_copied == 0) {
- host_copied = 1;
- strcpy(cithost,argv[a]);
- }
- else if (port_copied == 0) {
- port_copied = 1;
- strcpy(citport,argv[a]);
- }
-
-/*
- else {
- fprintf(stderr,"%s: usage: ",argv[0]);
- fprintf(stderr,"%s [host] [port] ",argv[0]);
- fprintf(stderr,"[-s socks_server]\n");
- logoff(2);
- }
+ error_printf("\rConnection timed out.\n");
+ logoff(NULL, 3);
+}
*/
- }
-
- server_is_local = 0;
- if ( (!strcmp(cithost,"localhost"))
- || (!strcmp(cithost,"127.0.0.1")) ) server_is_local = 1;
-
- /* if not using a SOCKS proxy server, make the connection directly */
- if (strlen(socks4)==0) {
- serv_sock = connectsock(cithost,citport,"tcp");
- return;
- }
-
- /* if using SOCKS, connect first to the proxy... */
- serv_sock = connectsock(socks4,"1080","tcp");
- printf("Connected to SOCKS proxy at %s.\n",socks4);
- printf("Attaching to server...\r");
- fflush(stdout);
-
- sprintf(buf,"%c%c",
- 4, /* version 4 */
- 1); /* method = connect */
- serv_write(buf,2);
-
- numericize(buf,cithost,citport,"tcp");
- serv_write(buf,6); /* port and address */
-
- p = (struct passwd *) getpwuid(getuid());
- serv_write(p->pw_name, strlen(p->pw_name)+1);
- /* user name */
-
- serv_read(buf,8); /* get response */
-
- if (buf[1] != 90) {
- printf("SOCKS server denied this proxy request.\n");
- logoff(3);
- }
-
- }
-
-/*
- * return the file descriptor of the server socket so we can select() on it.
- */
-int getsockfd(void) {
- return serv_sock;
- }
-
-
-/*
- * return one character
- */
-char serv_getc(void) {
- char buf[2];
- char ch;
-
- serv_read(buf, 1);
- ch = (int) buf[0];
-
- return(ch);
- }
projects / citadel.git / blobdiff