-/*
- * $Source$
- * $Author$
- * $Header$
+/* $Id$
+ *
+ * This routine is part of the client library. It handles
+ * creating a connection to the moira server.
*
- * Copyright (C) 1987 by the Massachusetts Institute of Technology
- * For copying and distribution information, please see the file
- * <mit-copyright.h>.
- *
- * This routine is part of the client library. It handles
- * creating a connection to the sms server.
+ * Copyright (C) 1987-1998 by the Massachusetts Institute of Technology
+ * For copying and distribution information, please see the file
+ * <mit-copyright.h>.
*/
-#ifndef lint
-static char *rcsid_sms_connect_c = "$Header$";
-#endif lint
-
#include <mit-copyright.h>
-#include "sms_private.h"
-#include <sms_app.h>
-#include <strings.h>
+#include <moira.h>
+#include <moira_site.h>
+#include "mr_private.h"
+
+#include <sys/types.h>
+#include <sys/socket.h>
+
+#include <netinet/in.h>
+#include <netdb.h>
+
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#ifdef HAVE_HESIOD
+#include <hesiod.h>
+#endif
+
+RCSID("$Header$");
+
+int _mr_conn = 0;
+static char *mr_server_host = NULL;
+
+/* mrgdb compatibility magic
+
+ The data looks like this:
-static char *sms_server_host = 0;
+ client -> server
+ 00000036 [length of rest of packet]
+ 00000004 [number of fields]
+ 01 01 01 01 [types of fields: 4 strings]
+ "server_id\0parms\0host\0user\0" [field names]
+ 00000001 [length of null-terminated server_id]
+ "\0" [server_id: ignored anyway]
+ 00000001 [length of null-terminated parms]
+ "\0" [parms: ignored anyway]
+ 00000001 [length of null-terminated client host]
+ "\0" [host: ignored anyway]
+ 00000001 [length of null-terminated client name]
+ "\0" [user: ignored anyway]
+
+ server -> client
+ 00000031 [length of rest of packet]
+ 00000003 [number of fields]
+ 00 01 01 [types of fields: int and 2 strings]
+ "disposition\0server_id\0parms\0" [field names]
+ 00000001 [GDB_ACCEPTED]
+ 00000001 [length of null-terminated server_id]
+ "\0" [server_id: ignored anyway]
+ 00000001 [length of null-terminated parms]
+ "\0" [parms: ignored anyway]
+
+*/
+
+static char challenge[58] = "\0\0\0\066\0\0\0\004\001\001\001\001server_id\0parms\0host\0user\0\0\0\0\001\0\0\0\0\001\0\0\0\0\001\0\0\0\0\001\0";
+static char response[53] = "\0\0\0\061\0\0\0\003\0\001\001disposition\0server_id\0parms\0\0\0\0\001\0\0\0\001\0\0\0\0\001\0";
/*
- * Open a connection to the sms server. Looks for the server name
+ * Open a connection to the moira server. Looks for the server name
* 1) passed as an argument, 2) in environment variable, 3) by hesiod
- * 4) compiled in default (from sms_app.h).
+ * 4) compiled in default
*/
-int sms_connect(server)
-char *server;
+int mr_connect(char *server)
{
- extern int errno;
- char *p, **pp, sbuf[256];
- extern char *getenv(), **hes_resolve();
-
- if (!sms_inited) sms_init();
- if (_sms_conn) return SMS_ALREADY_CONNECTED;
-
- if (!server || (strlen(server) == 0)) {
- server = getenv("MOIRASERVER");
- }
-
-#ifdef HESIOD
- if (!server || (strlen(server) == 0)) {
- pp = hes_resolve("moira", "sloc");
- if (pp) server = *pp;
- }
-#endif HESIOD
-
- if (!server || (strlen(server) == 0)) {
- server = SMS_SERVER;
- }
-
- if (!index(server, ':')) {
- p = index(SMS_SERVER, ':');
- p++;
- sprintf(sbuf, "%s:%s", server, p);
- server = sbuf;
- }
-
- errno = 0;
- _sms_conn = start_server_connection(server, "");
- if (_sms_conn == NULL)
- return errno;
- if (connection_status(_sms_conn) == CON_STOPPED) {
- register status = connection_errno(_sms_conn);
- if (!status) status = SMS_CANT_CONNECT;
- sms_disconnect();
- return status;
- }
-
- /*
- * stash hostname for later use
- */
-
- sms_server_host = strsave(server);
- if (p = index(sms_server_host, ':'))
- *p = 0;
- sms_server_host = canonicalize_hostname(sms_server_host);
- return 0;
+ char *port, **pp, *sbuf = NULL;
+
+ if (_mr_conn)
+ return MR_ALREADY_CONNECTED;
+ if (!mr_inited)
+ mr_init();
+
+ if (!server || (strlen(server) == 0))
+ server = getenv("MOIRASERVER");
+
+#ifdef HAVE_HESIOD
+ if (!server || (strlen(server) == 0))
+ {
+ pp = hes_resolve("moira", "sloc");
+ if (pp)
+ server = *pp;
+ }
+#endif
+
+ if (!server || (strlen(server) == 0))
+ server = MOIRA_SERVER;
+
+ if (strchr(server, ':'))
+ {
+ int len = strcspn(server, ":");
+ sbuf = malloc(len + 1);
+ strncpy(sbuf, server, len);
+ sbuf[len] = '\0';
+ port = strchr(server, ':') + 1;
+ server = sbuf;
+ }
+ else
+ port = strchr(MOIRA_SERVER, ':') + 1;
+
+ _mr_conn = mr_connect_internal(server, port);
+ free(sbuf);
+ if (!_mr_conn)
+ return MR_CANT_CONNECT;
+
+ return MR_SUCCESS;
}
-
-int sms_disconnect()
+
+int mr_connect_internal(char *server, char *port)
{
- CHECK_CONNECTED;
- _sms_conn = sever_connection(_sms_conn);
- free(sms_server_host);
- sms_server_host = 0;
+ int fd, size, more;
+ struct sockaddr_in target;
+ struct hostent *shost;
+ char actualresponse[53];
+
+ shost = gethostbyname(server);
+ if (!shost)
return 0;
+
+ if (port[0] == '#')
+ target.sin_port = htons(atoi(port + 1));
+ else
+ {
+ struct servent *s;
+ s = getservbyname(port, "tcp");
+ if (s)
+ target.sin_port = s->s_port;
+ else
+ return 0;
+ }
+
+ memcpy(&target.sin_addr, shost->h_addr, shost->h_length);
+ target.sin_family = shost->h_addrtype;
+
+ fd = socket(AF_INET, SOCK_STREAM, 0);
+ if (fd < 0)
+ return 0;
+
+ if (connect(fd, (struct sockaddr *)&target, sizeof(target)) < 0)
+ {
+ close(fd);
+ return 0;
+ }
+
+ /* Do magic mrgdb initialization */
+ size = write(fd, challenge, sizeof(challenge));
+ if (size != sizeof(challenge))
+ {
+ close(fd);
+ return 0;
+ }
+ for (size = 0; size < sizeof(actualresponse); size += more)
+ {
+ more = read(fd, actualresponse + size, sizeof(actualresponse) - size);
+ if (more <= 0)
+ break;
+ }
+ if (size != sizeof(actualresponse))
+ {
+ close(fd);
+ return 0;
+ }
+ if (memcmp(actualresponse, response, sizeof(actualresponse)))
+ {
+ close(fd);
+ return 0;
+ }
+
+ mr_server_host = strdup(shost->h_name);
+
+ /* You win */
+ return fd;
+}
+
+int mr_disconnect(void)
+{
+ CHECK_CONNECTED;
+ close(_mr_conn);
+ _mr_conn = 0;
+ free(mr_server_host);
+ mr_server_host = NULL;
+ return MR_SUCCESS;
+}
+
+int mr_host(char *host, int size)
+{
+ CHECK_CONNECTED;
+
+ /* If we are connected, mr_server_host points to a valid string. */
+ strncpy(host, mr_server_host, size);
+ host[size - 1] = '\0';
+ return MR_SUCCESS;
+}
+
+int mr_noop(void)
+{
+ int status;
+ mr_params params, reply;
+
+ CHECK_CONNECTED;
+ params.u.mr_procno = MR_NOOP;
+ params.mr_argc = 0;
+ params.mr_argl = NULL;
+ params.mr_argv = NULL;
+
+ if ((status = mr_do_call(¶ms, &reply)) == MR_SUCCESS)
+ status = reply.u.mr_status;
+
+ mr_destroy_reply(reply);
+
+ return status;
+}
+
+
+/* Server side */
+
+int mr_listen(char *port)
+{
+ struct sockaddr_in sin;
+ int s, on = 1;
+
+ memset(&sin, 0, sizeof(sin));
+ if (port[0] == '#')
+ sin.sin_port = atoi(port + 1);
+ else
+ {
+ struct servent *s;
+ s = getservbyname(port, "tcp");
+ if (s)
+ sin.sin_port = s->s_port;
+ else
+ return -1;
+ }
+
+ s = socket(AF_INET, SOCK_STREAM, 0);
+ if (s < 0)
+ return -1;
+ if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(int)) < 0)
+ {
+ close(s);
+ return -1;
+ }
+ if (bind(s, (struct sockaddr *)&sin, sizeof(sin)) < 0)
+ {
+ close(s);
+ return -1;
+ }
+ if (listen(s, 5) < 0)
+ {
+ close(s);
+ return -1;
+ }
+
+ return s;
}
-int sms_host(host, size)
- char *host;
- int size;
+/* mr_accept returns -1 on accept() error, 0 on bad connection,
+ or connection fd on success */
+
+int mr_accept(int s, struct sockaddr_in *sin)
{
- CHECK_CONNECTED;
+ int conn = -1, addrlen = sizeof(struct sockaddr_in), nread, status;
+ char *buf = NULL;
+
+ while (conn < 0)
+ {
+ conn = accept(s, (struct sockaddr *)sin, &addrlen);
+ if (conn < 0 && errno != EINTR
+#ifdef ERESTART
+ && errno != ERESTART
+#endif
+ )
+ return -1;
+ }
- /* If we are connected, sms_server_host points to a valid string. */
- strncpy(host, sms_server_host, size);
- return(0);
+ do
+ status = mr_cont_accept(conn, &buf, &nread);
+ while (status == -1);
+
+ return status;
}
-int sms_noop()
+/* mr_cont_accept returns 0 if it has failed, an fd if it has succeeded,
+ or -1 if it is still making progress */
+
+int mr_cont_accept(int conn, char **buf, int *nread)
{
- int status;
- sms_params param_st;
- struct sms_params *params = NULL;
- struct sms_params *reply = NULL;
-
- CHECK_CONNECTED;
- params = ¶m_st;
- params->sms_version_no = sending_version_no;
- params->sms_procno = SMS_NOOP;
- params->sms_argc = 0;
- params->sms_argl = NULL;
- params->sms_argv = NULL;
-
- if ((status = sms_do_call(params, &reply)) == 0)
- status = reply->sms_status;
-
- sms_destroy_reply(reply);
-
- return status;
+ long len, more;
+
+ if (!*buf)
+ {
+ char lbuf[4];
+ if (read(conn, lbuf, 4) != 4)
+ {
+ close(conn);
+ return 0;
+ }
+ getlong(lbuf, len);
+ len += 4;
+
+ *buf = malloc(len);
+ if (!*buf || len < 58)
+ {
+ close(conn);
+ free(*buf);
+ return 0;
+ }
+ putlong(*buf, len);
+ *nread = 4;
+ return -1;
+ }
+ else
+ getlong(*buf, len);
+
+ more = read(conn, *buf + *nread, len - *nread);
+
+ if (more == -1 && errno != EINTR)
+ {
+ close(conn);
+ free(*buf);
+ return 0;
+ }
+
+ *nread += more;
+
+ if (*nread != len)
+ return -1;
+
+ if (memcmp(*buf + 4, challenge + 4, 34))
+ {
+ close(conn);
+ free(*buf);
+ return 0;
+ }
+
+ /* good enough */
+ free(*buf);
+
+ if (write(conn, response, sizeof(response)) != sizeof(response))
+ {
+ close(conn);
+ return 0;
+ }
+ return conn;
}
andersk / moira.git / blobdiff