/*
- * ipc_c_tcp.c
+ * $Id$
*
- * Citadel/UX client/server IPC - client module using TCP/IP
- *
- * version 1.3 $Id$
+ * Client-side IPC functions
*
*/
-#define UDS "_UDS_"
-
-#define DEFAULT_HOST UDS
-#define DEFAULT_PORT "citadel"
-
#include "sysdep.h"
+#undef NDEBUG
+#include <assert.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.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"
#ifndef HAVE_SNPRINTF
#include "snprintf.h"
#endif
+#include "commands.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.
- */
-int server_is_local = 0;
-
-#ifndef INADDR_NONE
-#define INADDR_NONE 0xffffffff
-#endif
-
-int serv_sock;
-
-void connection_died(void) {
- fprintf(stderr, "\r"
- "Your connection to this Citadel server is broken.\n"
- "Please re-connect and log in again.\n");
- logoff(3);
-}
-
-
-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;
-
- memset(&sin, 0, 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);
-}
-
-int uds_connectsock(char *sockpath)
-{
- struct sockaddr_un addr;
- int s;
-
- memset(&addr, 0, sizeof(addr));
- addr.sun_family = AF_UNIX;
- strncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
-
- s = socket(AF_UNIX, SOCK_STREAM, 0);
- if (s < 0) {
- fprintf(stderr, "Can't create socket: %s\n",
- strerror(errno));
- logoff(3);
- }
-
- if (connect(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
- fprintf(stderr, "can't connect: %s\n",
- strerror(errno));
- logoff(3);
- }
-
- server_is_local = 1;
- 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;
-
- memset(&sin, 0, 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
- */
-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) {
- connection_died();
- return;
- }
- len = len + rlen;
- }
-}
-
-
-/*
- * 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) {
- connection_died();
- return;
- }
- bytes_written = bytes_written + retval;
- }
-}
-
-
-
-/*
- * input string from socket - implemented in terms of serv_read()
- */
-void serv_gets(char *buf)
-{
- int i;
-
- /* Read one character at a time.
- */
- for (i = 0;; i++) {
- serv_read(&buf[i], 1);
- if (buf[i] == '\n' || i == 255)
- break;
- }
+/* Note that some of these functions may not work with multiple instances. */
- /* If we got a long line, discard characters until the newline.
- */
- if (i == 255)
- while (buf[i] != '\n')
- serv_read(&buf[i], 1);
+static void (*deathHook)(void) = NULL;
+int (*error_printf)(char *s, ...) = (int (*)(char *, ...))printf;
- /* Strip the trailing newline.
- */
- buf[i] = 0;
+void setIPCDeathHook(void (*hook)(void)) {
+ deathHook = hook;
}
-
-/*
- * 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);
+void setIPCErrorPrintf(int (*func)(char *s, ...)) {
+ error_printf = func;
}
-
-/*
- * attach to server
- */
-void attach_to_server(int argc, char **argv, char *hostbuf, char *portbuf)
-{
- 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;
- char sockpath[256];
-
- 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);
- }
- */
+void connection_died(CtdlIPC* ipc, int using_ssl) {
+ if (deathHook != NULL) {
+ deathHook();
}
- if ((!strcmp(cithost, "localhost"))
- || (!strcmp(cithost, "127.0.0.1")))
- server_is_local = 1;
+ stty_ctdl(SB_RESTORE);
+ fprintf(stderr, "\r\n\n\n");
+ fprintf(stderr, "Your connection to %s is broken.\n", ipc->ServInfo.humannode);
- /* If we're using a unix domain socket we can do a bunch of stuff */
- if (!strcmp(cithost, UDS)) {
- sprintf(sockpath, "%s/citadel.socket", BBSDIR);
- serv_sock = uds_connectsock(sockpath);
- strcpy(hostbuf, cithost);
- strcpy(portbuf, sockpath);
- return;
- }
+#ifdef HAVE_OPENSSL
+ if (using_ssl) {
+ fprintf(stderr, "Last error: %s\n", ERR_reason_error_string(ERR_get_error()));
+ SSL_free(ipc->ssl);
+ ipc->ssl = NULL;
+ } else
+#endif
+ fprintf(stderr, "Last error: %s\n", strerror(errno));
- /* if not using a SOCKS proxy server, make the connection directly */
- if (strlen(socks4) == 0) {
- serv_sock = connectsock(cithost, citport, "tcp");
- strcpy(hostbuf, cithost);
- strcpy(portbuf, citport);
- 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");
+ fprintf(stderr, "Please re-connect and log in again.\n");
+ fflush(stderr);
fflush(stdout);
-
- snprintf(buf, sizeof 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);
- }
+ shutdown(ipc->sock, 2);
+ ipc->sock = -1;
+ exit(1);
}
-
-/*
- * 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