forgot upnp files
This commit is contained in:
Ron Pedde
parent
1f640234f5
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/*
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* $Id: $
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*
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* Implementation of functions for UPnP discovery
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*
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* Copyright (C) 2007 Ron Pedde (ron@pedde.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <stdio.h>
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#include <arpa/inet.h>
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#include <netinet/in.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include "conf.h"
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#include "daapd.h"
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#include "err.h"
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#include "os.h"
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#include "util.h"
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#define UPNP_MAX_PACKET 1500
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#define UPNP_UUID "12345678-1234-1234-1234-123456789012"
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typedef struct upnp_packetinfo_t {
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char *group_id;
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char *base_packet;
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char *location;
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char *usn;
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char *nt;
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char *body;
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struct upnp_packetinfo_t *next;
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} UPNP_PACKETINFO;
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/* Globals */
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UPNP_PACKETINFO upnp_packetlist;
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OS_SOCKETTYPE upnp_socket;
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/* Forwards */
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int upnp_strcat(char *what, char *where, int bytes_left);
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void upnp_build_packet(char *packet, int len, UPNP_PACKETINFO *pi);
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void upnp_broadcast(void);
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/**
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* add a upnp packet too the root list.
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*/
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void upnp_add_packet(char *group_id, char *location,
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char *usn, char *nt, char *body) {
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UPNP_PACKETINFO *pnew;
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pnew = (UPNP_PACKETINFO *)malloc(sizeof(UPNP_PACKETINFO));
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if(!pnew)
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DPRINTF(E_FATAL,L_MISC,"Malloc error\n");
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memset(pnew,0,sizeof(UPNP_PACKETINFO));
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if(group_id)
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pnew->group_id = strdup(group_id);
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if(location)
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pnew->location = strdup(location);
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if(usn)
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pnew->usn = strdup(usn);
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if(nt)
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pnew->nt = strdup(nt);
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if(body)
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pnew->body = strdup(body);
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util_mutex_lock(l_upnp);
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pnew->next = upnp_packetlist.next;
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upnp_packetlist.next = pnew;
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util_mutex_unlock(l_upnp);
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}
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int upnp_strcat(char *what, char *where, int bytes_left) {
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if(!what)
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return bytes_left;
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if(strlen(what) < bytes_left) {
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strcat(where,what);
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return bytes_left - strlen(what);
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}
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return bytes_left;
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}
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void upnp_build_packet(char *packet, int len, UPNP_PACKETINFO *pi) {
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char buffer[256];
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char hostname[256];
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*packet = '\0';
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int port;
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port = conf_get_int("general","port",0);
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len = upnp_strcat("NOTIFY * HTTP/1.0\r\n",packet,len);
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if(pi->location) {
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gethostname(hostname,sizeof(hostname));
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snprintf(buffer,sizeof(buffer),"LOCATION: http://%s:%d%s\r\n",
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hostname,port,pi->location);
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len=upnp_strcat(buffer,packet,len);
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}
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len=upnp_strcat("HOST: 239.255.255.250:1900\r\n",packet,len);
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len=upnp_strcat("SERVER: POSIX, UPnP/1.0, Firefly/" VERSION "\r\n",
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packet,len);
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len=upnp_strcat("NTS: ssdp:alive\r\n",packet,len);
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/* USN */
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len=upnp_strcat("USN: uuid:",packet,len);
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len=upnp_strcat(UPNP_UUID,packet,len);
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if(pi->usn) {
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snprintf(buffer,sizeof(buffer),"::%s",pi->usn);
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len=upnp_strcat(buffer,packet,len);
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}
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len=upnp_strcat("\r\n",packet,len);
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len=upnp_strcat("CACHE-CONTROL: max-age=1800\r\n",packet,len);
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if(pi->nt) {
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snprintf(buffer,sizeof(buffer),"NT: %s\r\n",pi->nt);
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} else {
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snprintf(buffer,sizeof(buffer),"NT: uuid:%s\r\n", UPNP_UUID);
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}
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len=upnp_strcat(buffer,packet,len);
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if(pi->body) {
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snprintf(buffer,sizeof(buffer),"Content-Length: %d\r\n\r\n",
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strlen(pi->body));
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len=upnp_strcat(buffer,packet,len);
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len=upnp_strcat(pi->body,packet,len);
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} else {
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len=upnp_strcat("Content-Length: 0\r\n\r\n",packet,len);
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}
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}
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/**
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* broadcast out the upnp packets
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*/
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void upnp_broadcast(void) {
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UPNP_PACKETINFO *pi;
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struct sockaddr_in sin;
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char packet[UPNP_MAX_PACKET];
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int pass;
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memset(&sin, 0, sizeof(sin));
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sin.sin_family = AF_INET;
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sin.sin_port = htons(1900);
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sin.sin_addr.s_addr = inet_addr("239.255.255.250");
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util_mutex_lock(l_upnp);
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for(pass=0; pass < 2; pass++) {
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pi=upnp_packetlist.next;
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while(pi) {
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upnp_build_packet(packet, UPNP_MAX_PACKET, pi);
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sendto(upnp_socket,packet,strlen(packet),0,
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(struct sockaddr *)&sin, sizeof(sin));
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pi = pi->next;
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}
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}
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util_mutex_unlock(l_upnp);
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}
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int upnp_tick(void) {
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static time_t last_broadcast = 0;
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if((time(NULL) - last_broadcast) > 60) {
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upnp_broadcast();
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last_broadcast = time(NULL);
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}
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return TRUE;
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}
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/**
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* start UPnP broadcaster. We'll want to send at least a rootdevice
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* announcement with a location pointer to the admin page
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*/
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int upnp_init(void) {
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int ttl = 3;
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int result;
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memset(&upnp_packetlist,0,sizeof(upnp_packetlist));
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upnp_add_packet("base","/",NULL,NULL,NULL);
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upnp_add_packet("base","/",
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"urn:schemas-upnp-org:device:Basic:1.0",
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"urn:schemas-upnp-org:device:Basic:1.0",NULL);
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upnp_add_packet("base","/","upnp:rootdevice","upnp:rootdevice",NULL);
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upnp_socket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
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result = setsockopt(upnp_socket, IPPROTO_IP, IP_MULTICAST_TTL,
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&ttl, sizeof(ttl));
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if(result == -1) {
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close(upnp_socket);
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return FALSE;
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}
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return TRUE;
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}
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/**
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* turn off any upnp services. Should really de-register
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* all registered devices, etc.
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*/
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int upnp_deinit(void) {
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close(upnp_socket);
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return TRUE;
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}
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@ -0,0 +1,40 @@
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/*
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* $Id: $
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*
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* Header functions for UPnP discovery
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*
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* Copyright (C) 2007 Ron Pedde (ron@pedde.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/**
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* This could probably be as easily (or better?) done via some
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* UPnP library, but I don't see any that are cross-platform to
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* the variety of platforms I want to port to, not to mention that
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* it's just some simple UDP broadcasts.
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*/
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#ifndef _UPNP_H_
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#define _UPNP_H_
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extern int upnp_init(void);
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extern int upnp_tick(void);
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extern int upnp_deinit(void);
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extern void upnp_add_packet(char *group_id, char *location,
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char *usn, char *nt, char *body);
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#endif /* _UPNP_H_ */
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