aboutsummaryrefslogtreecommitdiffstats
path: root/lib/ic/examples/c-server/server.c
diff options
context:
space:
mode:
authorErlang/OTP <[email protected]>2009-11-20 14:54:40 +0000
committerErlang/OTP <[email protected]>2009-11-20 14:54:40 +0000
commit84adefa331c4159d432d22840663c38f155cd4c1 (patch)
treebff9a9c66adda4df2106dfd0e5c053ab182a12bd /lib/ic/examples/c-server/server.c
downloadotp-84adefa331c4159d432d22840663c38f155cd4c1.tar.gz
otp-84adefa331c4159d432d22840663c38f155cd4c1.tar.bz2
otp-84adefa331c4159d432d22840663c38f155cd4c1.zip
The R13B03 release.OTP_R13B03
Diffstat (limited to 'lib/ic/examples/c-server/server.c')
-rw-r--r--lib/ic/examples/c-server/server.c245
1 files changed, 245 insertions, 0 deletions
diff --git a/lib/ic/examples/c-server/server.c b/lib/ic/examples/c-server/server.c
new file mode 100644
index 0000000000..7e3c620040
--- /dev/null
+++ b/lib/ic/examples/c-server/server.c
@@ -0,0 +1,245 @@
+/*
+ * %CopyrightBegin%
+ *
+ * Copyright Ericsson AB 1998-2009. All Rights Reserved.
+ *
+ * The contents of this file are subject to the Erlang Public License,
+ * Version 1.1, (the "License"); you may not use this file except in
+ * compliance with the License. You should have received a copy of the
+ * Erlang Public License along with this software. If not, it can be
+ * retrieved online at http://www.erlang.org/.
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * %CopyrightEnd%
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <string.h>
+#ifdef __WIN32__
+#include <winsock2.h>
+#include <direct.h>
+#include <windows.h>
+#include <winbase.h>
+#else /* not __WIN32__ */
+#include <errno.h>
+#include <unistd.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#endif
+#include "rmod_random__s.h"
+#include "ei_connect.h"
+
+/* Used functions */
+extern int gethostname(char *buf, int buflen);
+static int getport(int sockd);
+static int getlisten(int port);
+static int init(ei_cnode *ec, int *sd, int *portnr, int *epmd_fd);
+void terminate(int *fd, int *sd, int *epmd_fd);
+static void server_loop(ei_cnode *ec, int fd, int sd);
+
+/* change these, or even better, make command-line args to program... */
+#define COOKIE "flash"
+#define SERVER "babbis"
+#define NODENAMESZ 512
+#define HOSTNAMESZ 256
+#define INBUFSZ 1024
+#define OUTBUFSZ 1024
+
+
+int main(int argc, char **argv)
+{
+ int sd;
+ int portnr;
+ int epmd_fd;
+ ei_cnode ec;
+
+ /* crate file descriptors */
+ if (init(&ec, &sd, &portnr, &epmd_fd) < 0)
+ return -1;
+
+ /* start server loop */
+ server_loop(&ec, sd, epmd_fd);
+
+ return 0;
+}
+
+
+
+static void server_loop(ei_cnode *ec, int sd, int epmd_fd)
+{
+ ErlConnect conn;
+ erlang_msg msg;
+ int status=1;
+ CORBA_Environment *env;
+
+ /* Create and init CORBA_Environment */
+ env = CORBA_Environment_alloc(INBUFSZ,OUTBUFSZ);
+
+ while (status >= 0) {
+ status = 1;
+
+ if ((env->_fd = ei_accept(ec, sd, &conn)) < 0) {
+ /* error */
+ fprintf(stderr,"Accept failed: %s\n",strerror(errno));
+ } else {
+ /* connection */
+ fprintf(stderr,"Accepted connection from %s\n",conn.nodename);
+
+ while (status >= 0) {
+
+ /* write message to buffer */
+ status = ei_receive_encoded(env->_fd, &env->_inbuf, &env->_inbufsz, &msg, &env->_iin);
+ switch(status) {
+ case ERL_SEND:
+ case ERL_REG_SEND :
+ /* do transaction with fd */
+ rmod_random__switch(NULL,env);
+
+ switch(env->_major) {
+ case CORBA_NO_EXCEPTION: /* Success */
+ break;
+ case CORBA_SYSTEM_EXCEPTION: /* System exception */
+ printf("Request failure, reason : %s\n",(char *) CORBA_exception_value(env));
+ CORBA_exception_free(env);
+ break;
+ default: /* Should not come here */
+ CORBA_exception_free(env);
+ break;
+ }
+
+ /* send outdata */
+ if (env->_iout > 0)
+ ei_send_encoded(env->_fd,&env->_caller,env->_outbuf,env->_iout);
+ break;
+
+ case ERL_TICK :
+ break;
+ default : /* < 0 */
+ printf("Connection terminated\n");
+ break;
+ }
+ }
+ }
+ status=0; /* restart */
+ }
+
+ /* close file descriptors */
+ terminate(&env->_fd, &sd, &epmd_fd);
+
+ /* Free env & buffers */
+ CORBA_free(env->_inbuf);
+ CORBA_free(env->_outbuf);
+ CORBA_free(env);
+}
+
+
+
+static int init(int *sd, int *portnr, int *epmd_fd)
+{
+ char host[HOSTNAMESZ];
+ char servernode[NODENAMESZ];
+ struct hostent *h;
+
+ /* get the host name */
+ if ((gethostname(host,HOSTNAMESZ)))
+ fprintf(stderr,"can't find own hostname\n");
+ else {
+ /* identify host */
+ if (!(h = erl_gethostbyname(host)))
+ fprintf(stdout,"can't find own ip address\n");
+ else {
+
+ /* get a listen port. 0 means let system choose port number */
+ *sd = getlisten(0);
+
+ /* what port did we get? */
+ /* this call not necessary if we specified port in call to getlisten() */
+ *portnr = getport(*sd);
+
+ /* make the nodename server@host */
+ sprintf(servernode,"%s@%s",SERVER,host);
+
+ /* initiate */
+ /* cnode, host, alive, alive@host, addr, cookie, creation */
+ if (ei_connect_xinit(ec, host, SERVER, servernode,
+ (Erl_IpAddr)(h->h_addr_list[0]),
+ COOKIE, 0) == 0) {
+ /* let epmd know we are here */
+ *epmd_fd = ei_publish(ec, *portnr);
+ if (*epmd_fd >= 0)
+ return 0;
+ }
+ }
+ }
+ return -1;
+}
+
+
+void terminate(int *fd, int *sd, int *epmd_fd) {
+
+ close(*fd);
+
+ /* remove info from epnd */
+ close(*epmd_fd);
+
+ /* return socket */
+ close(*sd);
+
+}
+
+
+
+/* tells you what port you are using on given socket */
+static int getport(int sockd)
+{
+ struct sockaddr_in addr;
+ int namelen = sizeof(addr);
+ int i;
+
+ memset(&addr,0,sizeof(addr));
+
+ if ((i = getsockname(sockd,(struct sockaddr *)&addr,&namelen))<0)
+ return i;
+
+ return ntohs(addr.sin_port);
+}
+
+
+
+/* return a listen socket, bound to given port */
+/* specify port = 0 to let system assign port */
+static int getlisten(int port)
+{
+ int sockd;
+ struct sockaddr_in inaddr;
+ int opt = 1;
+ int i;
+
+ /* get listen socket */
+ if ((sockd = socket(AF_INET,SOCK_STREAM,0)) < 0) return sockd;
+
+ if ((i=setsockopt(sockd,SOL_SOCKET,SO_REUSEADDR,(void *)&opt,sizeof(opt)))<0)
+ return i;
+
+ /* bind to requested port */
+ memset(&inaddr,0,sizeof(inaddr));
+ inaddr.sin_family = AF_INET;
+ inaddr.sin_addr.s_addr = htonl(INADDR_ANY);
+ inaddr.sin_port = htons(port);
+
+ if ((i = bind(sockd,(struct sockaddr*) &inaddr, sizeof(inaddr))) < 0)
+ return i;
+
+ listen(sockd,5);
+
+ return sockd;
+}