/*
Written by Adrian Freed, The Center for New Music and Audio Technologies,
University of California, Berkeley. Copyright (c) 1992,93,94,95,96,97,98,99,2000,01,02,03,04
The Regents of the University of California (Regents).
Permission to use, copy, modify, distribute, and distribute modified versions
of this software and its documentation without fee and without a signed
licensing agreement, is hereby granted, provided that the above copyright
notice, this paragraph and the following two paragraphs appear in all copies,
modifications, and distributions.
IN NO EVENT SHALL REGENTS BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS, ARISING
OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF REGENTS HAS
BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
REGENTS SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. THE SOFTWARE AND ACCOMPANYING DOCUMENTATION, IF ANY, PROVIDED
HEREUNDER IS PROVIDED "AS IS". REGENTS HAS NO OBLIGATION TO PROVIDE
MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
The OSC webpage is http://cnmat.cnmat.berkeley.edu/OpenSoundControl
*/
/* htmsocket.c
Adrian Freed
send parameters to htm servers by udp or UNIX protocol
Modified 6/6/96 by Matt Wright to understand symbolic host names
in addition to X.X.X.X addresses.
pd: branched jdl
-- win additions raf 2002
-- enabled broadcast jdl 2003
*/
#if HAVE_CONFIG_H
#include <config.h>
#endif
#ifdef __APPLE__
#include <string.h>
#endif
#ifdef WIN32
#include <sys/types.h>
#include <sys/stat.h>
#include <winsock2.h>
#include <ctype.h>
#include <signal.h>
#include <sys/types.h>
#include <stdlib.h>
#include "OSC-common.h"
#include <stdio.h>
#include <io.h>
#include <ws2tcpip.h>
#else
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <netinet/in.h>
// #include <rpc/rpc.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/times.h>
#include <sys/param.h>
#include <sys/time.h>
#include <sys/ioctl.h>
#include <ctype.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <pwd.h>
#include <signal.h>
#include <grp.h>
#include <sys/fcntl.h>
#include <sys/file.h>
#include <sys/time.h>
#include <sys/types.h>
// #include <sys/prctl.h>
#include <stdlib.h>
#endif
#define UNIXDG_PATH "/tmp/htm"
#define UNIXDG_TMP "/tmp/htm.XXXXXX"
#include "htmsocket.h"
typedef struct
{
float srate;
struct sockaddr_in serv_addr; /* udp socket */
#ifndef WIN32
struct sockaddr_un userv_addr; /* UNIX socket */
#endif
int sockfd; /* socket file descriptor */
int index, len,uservlen;
void *addr;
int id;
} desc;
int IsAddressMulticast(unsigned long address)
{
unsigned long adr = ntohl(address);
unsigned char A = (unsigned char)((adr & 0xFF000000) >> 24);
unsigned char B = (unsigned char)((adr & 0xFF0000) >> 16);
unsigned char C = (unsigned char)((adr & 0xFF00) >> 8);
if (A==224 && B==0 && C==0) {
// This multicast group range is reserved for routing
// information and not meant to be used by applications.
return -1;
}
// This is the multicast group IP range
if (A>=224 && A<=239)
return 1;
return 0;
}
/* open a socket for HTM communication to given host on given portnumber */
/* if host is 0 then UNIX protocol is used (i.e. local communication */
void *OpenHTMSocket(char *host, int portnumber, short *multicast_TTL)
{
struct sockaddr_in cl_addr;
#ifndef WIN32
int sockfd;
struct sockaddr_un ucl_addr;
#else
unsigned int sockfd;
#endif
char oval = 1;
desc *o;
o = malloc(sizeof(*o));
if(!o)
return 0;
#ifndef WIN32
if(!host)
{
char *mktemp(char *);
int clilen;
o->len = sizeof(ucl_addr);
/*
* Fill in the structure "userv_addr" with the address of the
* server that we want to send to.
*/
bzero((char *) &o->userv_addr, sizeof(o->userv_addr));
o->userv_addr.sun_family = AF_UNIX;
strcpy(o->userv_addr.sun_path, UNIXDG_PATH);
sprintf(o->userv_addr.sun_path+strlen(o->userv_addr.sun_path), "%d", portnumber);
o->uservlen = sizeof(o->userv_addr.sun_family) + strlen(o->userv_addr.sun_path);
o->addr = &(o->userv_addr);
/*
* Open a socket (a UNIX domain datagram socket).
*/
if ( (sockfd = socket(AF_UNIX, SOCK_DGRAM, 0)) >= 0)
{
/*
* Bind a local address for us.
* In the UNIX domain we have to choose our own name (that
* should be unique). We'll use mktemp() to create a unique
* pathname, based on our process id.
*/
bzero((char *) &ucl_addr, sizeof(ucl_addr)); /* zero out */
ucl_addr.sun_family = AF_UNIX;
strcpy(ucl_addr.sun_path, UNIXDG_TMP);
mktemp(ucl_addr.sun_path);
clilen = sizeof(ucl_addr.sun_family) + strlen(ucl_addr.sun_path);
if (bind(sockfd, (struct sockaddr *) &ucl_addr, clilen) < 0)
{
perror("client: can't bind local address");
close(sockfd);
sockfd = -1;
}
}
else
perror("unable to make socket\n");
}else
#endif
{
/*
* Fill in the structure "serv_addr" with the address of the
* server that we want to send to.
*/
o->len = sizeof(cl_addr);
#ifdef WIN32
ZeroMemory((char *)&o->serv_addr, sizeof(o->serv_addr));
#else
bzero((char *)&o->serv_addr, sizeof(o->serv_addr));
#endif
o->serv_addr.sin_family = AF_INET;
/* MW 6/6/96: Call gethostbyname() instead of inet_addr(),
so that host can be either an Internet host name (e.g.,
"les") or an Internet address in standard dot notation
(e.g., "128.32.122.13") */
{
struct hostent *hostsEntry;
unsigned long address;
hostsEntry = gethostbyname(host);
if (hostsEntry == NULL) {
fprintf(stderr, "Couldn't decipher host name \"%s\"\n", host);
#ifndef WIN32
herror(NULL);
#endif
return 0;
}
address = *((unsigned long *) hostsEntry->h_addr_list[0]);
o->serv_addr.sin_addr.s_addr = address;
}
/* was: o->serv_addr.sin_addr.s_addr = inet_addr(host); */
/* End MW changes */
/*
* Open a socket (a UDP domain datagram socket).
*/
#ifdef WIN32
o->serv_addr.sin_port = htons((USHORT)portnumber);
o->addr = &(o->serv_addr);
if((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) != INVALID_SOCKET) {
ZeroMemory((char *)&cl_addr, sizeof(cl_addr));
cl_addr.sin_family = AF_INET;
cl_addr.sin_addr.s_addr = htonl(INADDR_ANY);
cl_addr.sin_port = htons(0);
// enable broadcast: jdl ~2003
if(setsockopt(sockfd, SOL_SOCKET, SO_BROADCAST, &oval, sizeof(int)) == -1) {
perror("setsockopt broadcast");
}
// check if specified address is a multicast group: ss 2007
int multicast = IsAddressMulticast(o->serv_addr.sin_addr.s_addr);
if (multicast == -1) {
perror("Multicast group range 224.0.0.[0-255] is reserved.\n");
*multicast_TTL = -2;
close(sockfd);
sockfd = -1;
}
else {
// set TTL according to whether we have a multicast group or not
if (multicast) {
if (*multicast_TTL<0)
*multicast_TTL = 1;
} else
*multicast_TTL = -1;
// set multicast Time-To-Live only if it is a multicast group: ss 2007
if(*multicast_TTL>=0) {
unsigned char ttl = (unsigned char)*multicast_TTL;
if (setsockopt(sockfd, IPPROTO_IP, IP_MULTICAST_TTL,
&ttl, sizeof(ttl)) == -1)
perror("setsockopt TTL");
}
if(bind(sockfd, (struct sockaddr *) &cl_addr, sizeof(cl_addr)) < 0) {
perror("could not bind\n");
closesocket(sockfd);
sockfd = -1;
}
}
}
else { perror("unable to make socket\n");}
#else
o->serv_addr.sin_port = htons(portnumber);
o->addr = &(o->serv_addr);
if((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) >= 0) {
bzero((char *)&cl_addr, sizeof(cl_addr));
cl_addr.sin_family = AF_INET;
cl_addr.sin_addr.s_addr = htonl(INADDR_ANY);
cl_addr.sin_port = htons(0);
// enable broadcast: jdl ~2003
if(setsockopt(sockfd, SOL_SOCKET, SO_BROADCAST, &oval, sizeof(int)) == -1) {
perror("setsockopt");
}
// check if specified address is a multicast group: ss 2007
int multicast = IsAddressMulticast(o->serv_addr.sin_addr.s_addr);
if (multicast == -1) {
perror("Multicast group range 224.0.0.[0-255] is reserved.\n");
*multicast_TTL = -2;
close(sockfd);
sockfd = -1;
}
else {
// check if specified address is a multicast group: ss 2007
if (multicast) {
if (*multicast_TTL<0)
*multicast_TTL = 1;
} else
*multicast_TTL = -1;
// set multicast Time-To-Live only if it is a multicast group: ss 2007
if(*multicast_TTL>=0) {
unsigned char ttl = (unsigned char)*multicast_TTL;
if (setsockopt(sockfd, IPPROTO_IP, IP_MULTICAST_TTL,
&ttl, sizeof(ttl)) == -1)
perror("setsockopt TTL");
}
if(bind(sockfd, (struct sockaddr *) &cl_addr, sizeof(cl_addr)) < 0) {
perror("could not bind\n");
close(sockfd);
sockfd = -1;
}
}
}
else { perror("unable to make socket\n");}
#endif
}
#ifdef WIN32
if(sockfd == INVALID_SOCKET) {
#else
if(sockfd < 0) {
#endif
free(o);
o = 0;
}
else
o->sockfd = sockfd;
return o;
}
#include <errno.h>
static bool sendudp(const struct sockaddr *sp, int sockfd,int length, int count, void *b)
{
int rcount;
if((rcount=sendto(sockfd, b, count, 0, sp, length)) != count)
{
printf("sockfd %d count %d rcount %dlength %d errno %d\n", sockfd,count,rcount,length, errno);
return FALSE;
}
return TRUE;
}
bool SendHTMSocket(void *htmsendhandle, int length_in_bytes, void *buffer)
{
desc *o = (desc *)htmsendhandle;
return sendudp(o->addr, o->sockfd, o->len, length_in_bytes, buffer);
}
void CloseHTMSocket(void *htmsendhandle)
{
desc *o = (desc *)htmsendhandle;
#ifdef WIN32
if(SOCKET_ERROR == closesocket(o->sockfd)) {
perror("CloseHTMSocket::closesocket failed\n");
return;
}
#else
if(close(o->sockfd) == -1)
{
perror("CloseHTMSocket::closesocket failed");
return;
}
#endif
free(o);
}