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upnphttp.c
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/* MiniDLNA project
*
* http://sourceforge.net/projects/minidlna/
*
* MiniDLNA media server
* Copyright (C) 2008-2009 Justin Maggard
*
* This file is part of MiniDLNA.
*
* MiniDLNA is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* MiniDLNA is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with MiniDLNA. If not, see <http://www.gnu.org/licenses/>.
*
* Portions of the code from the MiniUPnP project:
*
* Copyright (c) 2006-2007, Thomas Bernard
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/param.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <arpa/inet.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <limits.h>
#include "config.h"
#include "event.h"
#include "upnpglobalvars.h"
#include "upnphttp.h"
#include "upnpdescgen.h"
#include "minidlnapath.h"
#include "upnpsoap.h"
#include "upnpevents.h"
#include "utils.h"
#include "getifaddr.h"
#include "image_utils.h"
#include "log.h"
#include "sql.h"
#include <libexif/exif-loader.h>
#include "tivo_utils.h"
#include "tivo_commands.h"
#include "clients.h"
#include "process.h"
#include "sendfile.h"
#define MAX_BUFFER_SIZE 2147483647
#define MIN_BUFFER_SIZE 65536
#define INIT_STR(s, d) { s.data = d; s.size = sizeof(d); s.off = 0; }
#include "icons.c"
enum event_type {
E_INVALID,
E_SUBSCRIBE,
E_RENEW
};
static void SendResp_icon(struct upnphttp *, char * url);
static void SendResp_albumArt(struct upnphttp *, char * url);
static void SendResp_caption(struct upnphttp *, char * url);
static void SendResp_resizedimg(struct upnphttp *, char * url);
static void SendResp_thumbnail(struct upnphttp *, char * url);
static void SendResp_dlnafile(struct upnphttp *, char * url);
static void Process_upnphttp(struct event *ev);
struct upnphttp *
New_upnphttp(int s)
{
struct upnphttp * ret;
if(s<0)
return NULL;
ret = (struct upnphttp *)malloc(sizeof(struct upnphttp));
if(ret == NULL)
return NULL;
memset(ret, 0, sizeof(struct upnphttp));
ret->ev = (struct event ){ .fd = s, .rdwr = EVENT_READ, .process = Process_upnphttp, .data = ret };
event_module.add(&ret->ev);
return ret;
}
void
CloseSocket_upnphttp(struct upnphttp * h)
{
event_module.del(&h->ev, EV_FLAG_CLOSING);
if(close(h->ev.fd) < 0)
{
DPRINTF(E_ERROR, L_HTTP, "CloseSocket_upnphttp: close(%d): %s\n", h->ev.fd, strerror(errno));
}
h->ev.fd = -1;
h->state = 100;
}
void
Delete_upnphttp(struct upnphttp * h)
{
if(h)
{
if(h->ev.fd >= 0)
CloseSocket_upnphttp(h);
free(h->req_buf);
free(h->res_buf);
free(h);
}
}
/* parse HttpHeaders of the REQUEST */
static void
ParseHttpHeaders(struct upnphttp * h)
{
int client = 0;
char * line;
char * colon;
char * p;
int n;
line = h->req_buf;
/* TODO : check if req_buf, contentoff are ok */
while(line < (h->req_buf + h->req_contentoff))
{
colon = strchr(line, ':');
if(colon)
{
if(strncasecmp(line, "Content-Length", 14)==0)
{
p = colon;
while(*p && (*p < '0' || *p > '9'))
p++;
h->req_contentlen = atoi(p);
if(h->req_contentlen < 0) {
DPRINTF(E_WARN, L_HTTP, "Invalid Content-Length %d", h->req_contentlen);
h->req_contentlen = 0;
}
}
else if(strncasecmp(line, "SOAPAction", 10)==0)
{
p = colon;
n = 0;
while(*p == ':' || *p == ' ' || *p == '\t')
p++;
while(p[n] >= ' ')
n++;
if(n >= 2 &&
((p[0] == '"' && p[n-1] == '"') ||
(p[0] == '\'' && p[n-1] == '\'')))
{
p++;
n -= 2;
}
h->req_soapAction = p;
h->req_soapActionLen = n;
}
else if(strncasecmp(line, "Callback", 8)==0)
{
p = colon;
while(*p && *p != '<' && *p != '\r' )
p++;
n = 0;
while(p[n] && p[n] != '>' && p[n] != '\r' )
n++;
h->req_Callback = p + 1;
h->req_CallbackLen = MAX(0, n - 1);
}
else if(strncasecmp(line, "SID", 3)==0)
{
//zqiu: fix bug for test 4.0.5
//Skip extra headers like "SIDHEADER: xxxxxx xxx"
for(p=line+3;p<colon;p++)
{
if(!isspace(*p))
{
p = NULL; //unexpected header
break;
}
}
if(p) {
p = colon + 1;
while(isspace(*p))
p++;
n = 0;
while(p[n] && !isspace(p[n]))
n++;
h->req_SID = p;
h->req_SIDLen = n;
}
}
else if(strncasecmp(line, "NT", 2)==0)
{
p = colon + 1;
while(isspace(*p))
p++;
n = 0;
while(p[n] && !isspace(p[n]))
n++;
h->req_NT = p;
h->req_NTLen = n;
}
/* Timeout: Seconds-nnnn */
/* TIMEOUT
Recommended. Requested duration until subscription expires,
either number of seconds or infinite. Recommendation
by a UPnP Forum working committee. Defined by UPnP vendor.
Consists of the keyword "Second-" followed (without an
intervening space) by either an integer or the keyword "infinite". */
else if(strncasecmp(line, "Timeout", 7)==0)
{
p = colon + 1;
while(isspace(*p))
p++;
if(strncasecmp(p, "Second-", 7)==0) {
h->req_Timeout = atoi(p+7);
}
}
// Range: bytes=xxx-yyy
else if(strncasecmp(line, "Range", 5)==0)
{
p = colon + 1;
while(isspace(*p))
p++;
if(strncasecmp(p, "bytes=", 6)==0) {
h->reqflags |= FLAG_RANGE;
h->req_RangeStart = strtoll(p+6, &colon, 10);
h->req_RangeEnd = colon ? atoll(colon+1) : 0;
DPRINTF(E_DEBUG, L_HTTP, "Range Start-End: %lld - %lld\n",
(long long)h->req_RangeStart,
h->req_RangeEnd ? (long long)h->req_RangeEnd : -1);
}
}
else if(strncasecmp(line, "Host", 4)==0)
{
int i;
h->reqflags |= FLAG_HOST;
p = colon + 1;
while(isspace(*p))
p++;
n = 0;
while(p[n] >= ' ')
n++;
h->req_Host = p;
h->req_HostLen = n;
for(n = 0; n < n_lan_addr; n++)
{
for(i = 0; lan_addr[n].str[i]; i++)
{
if(lan_addr[n].str[i] != p[i])
break;
}
if(i && !lan_addr[n].str[i])
{
h->iface = n;
break;
}
}
}
else if(strncasecmp(line, "User-Agent", 10)==0)
{
int i;
/* Skip client detection if we already detected it. */
if( client )
goto next_header;
p = colon + 1;
while(isspace(*p))
p++;
for (i = 0; client_types[i].name; i++)
{
if (client_types[i].match_type != EUserAgent)
continue;
if (strstrc(p, client_types[i].match, '\r') != NULL)
{
client = i;
break;
}
}
}
else if(strncasecmp(line, "X-AV-Client-Info", 16)==0)
{
int i;
/* Skip client detection if we already detected it. */
if( client && client_types[client].type < EStandardDLNA150 )
goto next_header;
p = colon + 1;
while(isspace(*p))
p++;
for (i = 0; client_types[i].name; i++)
{
if (client_types[i].match_type != EXAVClientInfo)
continue;
if (strstrc(p, client_types[i].match, '\r') != NULL)
{
client = i;
break;
}
}
}
else if(strncasecmp(line, "Transfer-Encoding", 17)==0)
{
p = colon + 1;
while(isspace(*p))
p++;
if(strncasecmp(p, "chunked", 7)==0)
{
h->reqflags |= FLAG_CHUNKED;
}
}
else if(strncasecmp(line, "Accept-Language", 15)==0)
{
h->reqflags |= FLAG_LANGUAGE;
}
else if(strncasecmp(line, "getcontentFeatures.dlna.org", 27)==0)
{
p = colon + 1;
while(isspace(*p))
p++;
if( (*p != '1') || !isspace(p[1]) )
h->reqflags |= FLAG_INVALID_REQ;
}
else if(strncasecmp(line, "TimeSeekRange.dlna.org", 22)==0)
{
h->reqflags |= FLAG_TIMESEEK;
}
else if(strncasecmp(line, "PlaySpeed.dlna.org", 18)==0)
{
h->reqflags |= FLAG_PLAYSPEED;
}
else if(strncasecmp(line, "realTimeInfo.dlna.org", 21)==0)
{
h->reqflags |= FLAG_REALTIMEINFO;
}
else if(strncasecmp(line, "getAvailableSeekRange.dlna.org", 21)==0)
{
p = colon + 1;
while(isspace(*p))
p++;
if( (*p != '1') || !isspace(p[1]) )
h->reqflags |= FLAG_INVALID_REQ;
}
else if(strncasecmp(line, "transferMode.dlna.org", 21)==0)
{
p = colon + 1;
while(isspace(*p))
p++;
if(strncasecmp(p, "Streaming", 9)==0)
{
h->reqflags |= FLAG_XFERSTREAMING;
}
if(strncasecmp(p, "Interactive", 11)==0)
{
h->reqflags |= FLAG_XFERINTERACTIVE;
}
if(strncasecmp(p, "Background", 10)==0)
{
h->reqflags |= FLAG_XFERBACKGROUND;
}
}
else if(strncasecmp(line, "getCaptionInfo.sec", 18)==0)
{
h->reqflags |= FLAG_CAPTION;
}
else if(strncasecmp(line, "FriendlyName", 12)==0)
{
int i;
p = colon + 1;
while(isspace(*p))
p++;
for (i = 0; client_types[i].name; i++)
{
if (client_types[i].match_type != EFriendlyName)
continue;
if (strstrc(p, client_types[i].match, '\r') != NULL)
{
client = i;
break;
}
}
}
else if(strncasecmp(line, "uctt.upnp.org:", 14)==0)
{
/* Conformance testing */
SETFLAG(DLNA_STRICT_MASK);
}
}
next_header:
line = strstr(line, "\r\n");
if (!line)
return;
line += 2;
}
if (h->reqflags & FLAG_CHUNKED)
{
char *endptr;
h->req_chunklen = -1;
if (h->req_buflen <= h->req_contentoff)
return;
while( (line < (h->req_buf + h->req_buflen)) &&
((h->req_chunklen = strtol(line, &endptr, 16)) > 0) &&
(endptr != line) )
{
endptr = strstr(endptr, "\r\n");
if (!endptr)
{
return;
}
line = endptr+h->req_chunklen+2;
}
if( endptr == line )
{
h->req_chunklen = -1;
return;
}
}
/* If the client type wasn't found, search the cache.
* This is done because a lot of clients like to send a
* different User-Agent with different types of requests. */
h->req_client = SearchClientCache(h->clientaddr, 0);
/* Add this client to the cache if it's not there already. */
if (!h->req_client)
{
h->req_client = AddClientCache(h->clientaddr, client);
}
else if (client)
{
enum client_types type = client_types[client].type;
enum client_types ctype = h->req_client->type->type;
/* If we know the client and our new detection is generic, use our cached info */
/* If we detected a Samsung Series B earlier, don't overwrite it with Series A info */
if ((ctype && ctype < EStandardDLNA150 && type >= EStandardDLNA150) ||
(ctype == ESamsungSeriesB && type == ESamsungSeriesA))
return;
h->req_client->type = &client_types[client];
h->req_client->age = time(NULL);
}
}
/* very minimalistic 400 error message */
static void
Send400(struct upnphttp * h)
{
static const char body400[] =
"<HTML><HEAD><TITLE>400 Bad Request</TITLE></HEAD>"
"<BODY><H1>Bad Request</H1>The request is invalid"
" for this HTTP version.</BODY></HTML>\r\n";
h->respflags = FLAG_HTML;
BuildResp2_upnphttp(h, 400, "Bad Request",
body400, sizeof(body400) - 1);
SendResp_upnphttp(h);
CloseSocket_upnphttp(h);
}
/* very minimalistic 403 error message */
static void
Send403(struct upnphttp * h)
{
static const char body403[] =
"<HTML><HEAD><TITLE>403 Forbidden</TITLE></HEAD>"
"<BODY><H1>Forbidden</H1>You don't have permission to access this resource."
"</BODY></HTML>\r\n";
h->respflags = FLAG_HTML;
BuildResp2_upnphttp(h, 403, "Forbidden",
body403, sizeof(body403) - 1);
SendResp_upnphttp(h);
CloseSocket_upnphttp(h);
}
/* very minimalistic 404 error message */
static void
Send404(struct upnphttp * h)
{
static const char body404[] =
"<HTML><HEAD><TITLE>404 Not Found</TITLE></HEAD>"
"<BODY><H1>Not Found</H1>The requested URL was not found"
" on this server.</BODY></HTML>\r\n";
h->respflags = FLAG_HTML;
BuildResp2_upnphttp(h, 404, "Not Found",
body404, sizeof(body404) - 1);
SendResp_upnphttp(h);
CloseSocket_upnphttp(h);
}
/* very minimalistic 406 error message */
static void
Send406(struct upnphttp * h)
{
static const char body406[] =
"<HTML><HEAD><TITLE>406 Not Acceptable</TITLE></HEAD>"
"<BODY><H1>Not Acceptable</H1>An unsupported operation"
" was requested.</BODY></HTML>\r\n";
h->respflags = FLAG_HTML;
BuildResp2_upnphttp(h, 406, "Not Acceptable",
body406, sizeof(body406) - 1);
SendResp_upnphttp(h);
CloseSocket_upnphttp(h);
}
/* very minimalistic 416 error message */
static void
Send416(struct upnphttp * h)
{
static const char body416[] =
"<HTML><HEAD><TITLE>416 Requested Range Not Satisfiable</TITLE></HEAD>"
"<BODY><H1>Requested Range Not Satisfiable</H1>The requested range"
" was outside the file's size.</BODY></HTML>\r\n";
h->respflags = FLAG_HTML;
BuildResp2_upnphttp(h, 416, "Requested Range Not Satisfiable",
body416, sizeof(body416) - 1);
SendResp_upnphttp(h);
CloseSocket_upnphttp(h);
}
/* very minimalistic 500 error message */
void
Send500(struct upnphttp * h)
{
static const char body500[] =
"<HTML><HEAD><TITLE>500 Internal Server Error</TITLE></HEAD>"
"<BODY><H1>Internal Server Error</H1>Server encountered "
"and Internal Error.</BODY></HTML>\r\n";
h->respflags = FLAG_HTML;
BuildResp2_upnphttp(h, 500, "Internal Server Errror",
body500, sizeof(body500) - 1);
SendResp_upnphttp(h);
CloseSocket_upnphttp(h);
}
/* very minimalistic 501 error message */
void
Send501(struct upnphttp * h)
{
static const char body501[] =
"<HTML><HEAD><TITLE>501 Not Implemented</TITLE></HEAD>"
"<BODY><H1>Not Implemented</H1>The HTTP Method "
"is not implemented by this server.</BODY></HTML>\r\n";
h->respflags = FLAG_HTML;
BuildResp2_upnphttp(h, 501, "Not Implemented",
body501, sizeof(body501) - 1);
SendResp_upnphttp(h);
CloseSocket_upnphttp(h);
}
/* Sends the description generated by the parameter */
static void
sendXMLdesc(struct upnphttp * h, char * (f)(int *))
{
char * desc;
int len;
desc = f(&len);
if(!desc)
{
DPRINTF(E_ERROR, L_HTTP, "Failed to generate XML description\n");
Send500(h);
return;
}
BuildResp_upnphttp(h, desc, len);
SendResp_upnphttp(h);
CloseSocket_upnphttp(h);
free(desc);
}
#ifdef READYNAS
static void
SendResp_readynas_admin(struct upnphttp * h)
{
char body[128];
int l;
h->respflags = FLAG_HTML;
l = snprintf(body, sizeof(body), "<meta http-equiv=\"refresh\" content=\"0; url=https://%s/admin/\">",
lan_addr[h->iface].str);
BuildResp_upnphttp(h, body, l);
SendResp_upnphttp(h);
CloseSocket_upnphttp(h);
}
#endif
static void
SendResp_presentation(struct upnphttp * h)
{
struct string_s str;
char body[4096];
int a, v, p, i;
INIT_STR(str, body);
h->respflags = FLAG_HTML;
a = sql_get_int_field(db, "SELECT count(*) from DETAILS where MIME glob 'a*'");
v = sql_get_int_field(db, "SELECT count(*) from DETAILS where MIME glob 'v*'");
p = sql_get_int_field(db, "SELECT count(*) from DETAILS where MIME glob 'i*'");
strcatf(&str,
"<HTML><HEAD><TITLE>" SERVER_NAME " " MINIDLNA_VERSION "</TITLE><meta http-equiv=\"refresh\" content=\"20\"></HEAD>"
"<BODY><div style=\"text-align: center\">"
"<h2>" SERVER_NAME " status</h2></div>");
strcatf(&str,
"<h3>Media library</h3>"
"<table border=1 cellpadding=10>"
"<tr><td>Audio files</td><td>%d</td></tr>"
"<tr><td>Video files</td><td>%d</td></tr>"
"<tr><td>Image files</td><td>%d</td></tr>"
"</table>", a, v, p);
if (GETFLAG(SCANNING_MASK))
strcatf(&str,
"<br><i>* Media scan in progress</i><br>");
strcatf(&str,
"<h3>Connected clients</h3>"
"<table border=1 cellpadding=10>"
"<tr><td>ID</td><td>Type</td><td>IP Address</td><td>HW Address</td><td>Connections</td></tr>");
for (i = 0; i < CLIENT_CACHE_SLOTS; i++)
{
if (!clients[i].addr.s_addr)
continue;
strcatf(&str, "<tr><td>%d</td><td>%s</td><td>%s</td><td>%02X:%02X:%02X:%02X:%02X:%02X</td><td>%d</td></tr>",
i, clients[i].type->name, inet_ntoa(clients[i].addr),
clients[i].mac[0], clients[i].mac[1], clients[i].mac[2],
clients[i].mac[3], clients[i].mac[4], clients[i].mac[5], clients[i].connections);
}
strcatf(&str, "</table>");
strcatf(&str, "<br>%d connection%s currently open<br>", number_of_children, (number_of_children == 1 ? "" : "s"));
strcatf(&str, "</BODY></HTML>\r\n");
BuildResp_upnphttp(h, str.data, str.off);
SendResp_upnphttp(h);
CloseSocket_upnphttp(h);
}
/* ProcessHTTPPOST_upnphttp()
* executes the SOAP query if it is possible */
static void
ProcessHTTPPOST_upnphttp(struct upnphttp * h)
{
if((h->req_buflen - h->req_contentoff) >= h->req_contentlen)
{
if(h->req_soapAction)
{
/* we can process the request */
DPRINTF(E_DEBUG, L_HTTP, "SOAPAction: %.*s\n", h->req_soapActionLen, h->req_soapAction);
ExecuteSoapAction(h,
h->req_soapAction,
h->req_soapActionLen);
}
else
{
static const char err400str[] =
"<html><body>Bad request</body></html>";
DPRINTF(E_WARN, L_HTTP, "No SOAPAction in HTTP headers\n");
h->respflags = FLAG_HTML;
BuildResp2_upnphttp(h, 400, "Bad Request",
err400str, sizeof(err400str) - 1);
SendResp_upnphttp(h);
CloseSocket_upnphttp(h);
}
}
else
{
/* waiting for remaining data */
h->state = 1;
}
}
static int
check_event(struct upnphttp *h)
{
enum event_type type = E_INVALID;
if (h->req_Callback)
{
if (h->req_SID || !h->req_NT)
{
BuildResp2_upnphttp(h, 400, "Bad Request",
"<html><body>Bad request</body></html>", 37);
}
else if (strncmp(h->req_Callback, "http://", 7) != 0 ||
strncmp(h->req_NT, "upnp:event", h->req_NTLen) != 0)
{
/* Missing or invalid CALLBACK : 412 Precondition Failed.
* If CALLBACK header is missing or does not contain a valid HTTP URL,
* the publisher must respond with HTTP error 412 Precondition Failed*/
BuildResp2_upnphttp(h, 412, "Precondition Failed", 0, 0);
}
else
{
/* Make sure callback URL points to the originating IP */
struct in_addr addr;
char addrstr[16];
int i = 0;
const char *p = h->req_Callback + 7;
while (!strchr("/:>", *p) && i < sizeof(addrstr) - 1 &&
p < (h->req_Callback + h->req_CallbackLen))
{
addrstr[i++] = *(p++);
}
addrstr[i] = '\0';
if (inet_pton(AF_INET, addrstr, &addr) <= 0 ||
memcmp(&addr, &h->clientaddr, sizeof(struct in_addr)))
{
DPRINTF(E_ERROR, L_HTTP, "Bad callback IP (%s)\n", addrstr);
BuildResp2_upnphttp(h, 412, "Precondition Failed", 0, 0);
}
else
type = E_SUBSCRIBE;
}
}
else if (h->req_SID)
{
/* subscription renew */
if (h->req_NT)
{
BuildResp2_upnphttp(h, 400, "Bad Request",
"<html><body>Bad request</body></html>", 37);
}
else
type = E_RENEW;
}
else
{
BuildResp2_upnphttp(h, 412, "Precondition Failed", 0, 0);
}
return type;
}
static void
ProcessHTTPSubscribe_upnphttp(struct upnphttp * h, const char * path)
{
const char * sid;
enum event_type type;
DPRINTF(E_DEBUG, L_HTTP, "ProcessHTTPSubscribe %s\n", path);
DPRINTF(E_DEBUG, L_HTTP, "Callback '%.*s' Timeout=%d\n",
h->req_CallbackLen, h->req_Callback, h->req_Timeout);
DPRINTF(E_DEBUG, L_HTTP, "SID '%.*s'\n", h->req_SIDLen, h->req_SID);
type = check_event(h);
if (type == E_SUBSCRIBE)
{
/* - add to the subscriber list
* - respond HTTP/x.x 200 OK
* - Send the initial event message */
/* Server:, SID:; Timeout: Second-(xx|infinite) */
sid = upnpevents_addSubscriber(path, h->req_Callback,
h->req_CallbackLen, h->req_Timeout);
h->respflags = FLAG_TIMEOUT;
if (sid)
{
DPRINTF(E_DEBUG, L_HTTP, "generated sid=%s\n", sid);
h->respflags |= FLAG_SID;
h->req_SID = sid;
h->req_SIDLen = strlen(sid);
}
BuildResp_upnphttp(h, 0, 0);
}
else if (type == E_RENEW)
{
/* subscription renew */
if (renewSubscription(h->req_SID, h->req_SIDLen, h->req_Timeout) < 0)
{
/* Invalid SID
412 Precondition Failed. If a SID does not correspond to a known,
un-expired subscription, the publisher must respond
with HTTP error 412 Precondition Failed. */
BuildResp2_upnphttp(h, 412, "Precondition Failed", 0, 0);
}
else
{
/* A DLNA device must enforce a 5 minute timeout */
h->respflags = FLAG_TIMEOUT;
h->req_Timeout = 300;
h->respflags |= FLAG_SID;
BuildResp_upnphttp(h, 0, 0);
}
}
SendResp_upnphttp(h);
CloseSocket_upnphttp(h);
}
static void
ProcessHTTPUnSubscribe_upnphttp(struct upnphttp * h, const char * path)
{
enum event_type type;
DPRINTF(E_DEBUG, L_HTTP, "ProcessHTTPUnSubscribe %s\n", path);
DPRINTF(E_DEBUG, L_HTTP, "SID '%.*s'\n", h->req_SIDLen, h->req_SID);
/* Remove from the list */
type = check_event(h);
if (type != E_INVALID)
{
if(upnpevents_removeSubscriber(h->req_SID, h->req_SIDLen) < 0)
BuildResp2_upnphttp(h, 412, "Precondition Failed", 0, 0);
else
BuildResp_upnphttp(h, 0, 0);
}
SendResp_upnphttp(h);
CloseSocket_upnphttp(h);
}
/* Parse and process Http Query
* called once all the HTTP headers have been received. */
static void
ProcessHttpQuery_upnphttp(struct upnphttp * h)
{
char HttpCommand[16];
char HttpUrl[512];
char * HttpVer;
char * p;
int i;
p = h->req_buf;
if(!p)
return;
for(i = 0; i<15 && *p && *p != ' ' && *p != '\r'; i++)
HttpCommand[i] = *(p++);
HttpCommand[i] = '\0';
while(*p==' ')
p++;
for(i = 0; i<511 && *p && *p != ' ' && *p != '\r'; i++)
HttpUrl[i] = *(p++);
HttpUrl[i] = '\0';
while(*p==' ')
p++;
HttpVer = h->HttpVer;
for(i = 0; i<15 && *p && *p != '\r'; i++)
HttpVer[i] = *(p++);
HttpVer[i] = '\0';
/* set the interface here initially, in case there is no Host header */
for(i = 0; i<n_lan_addr; i++)
{
if( (h->clientaddr.s_addr & lan_addr[i].mask.s_addr)
== (lan_addr[i].addr.s_addr & lan_addr[i].mask.s_addr))
{
h->iface = i;
break;
}
}
ParseHttpHeaders(h);
/* see if we need to wait for remaining data */
if( (h->reqflags & FLAG_CHUNKED) )
{
if( h->req_chunklen == -1)
{
Send400(h);
return;
}
if( h->req_chunklen )
{
h->state = 2;
return;
}
char *chunkstart, *chunk, *endptr, *endbuf;
chunk = endbuf = chunkstart = h->req_buf + h->req_contentoff;
while ((h->req_chunklen = strtol(chunk, &endptr, 16)) > 0 && (endptr != chunk) )
{
endptr = strstr(endptr, "\r\n");
if (!endptr)
{
Send400(h);
return;
}
endptr += 2;
memmove(endbuf, endptr, h->req_chunklen);
endbuf += h->req_chunklen;
chunk = endptr + h->req_chunklen;
}
h->req_contentlen = endbuf - chunkstart;
h->req_buflen = endbuf - h->req_buf;
h->state = 100;
}
DPRINTF(E_DEBUG, L_HTTP, "HTTP REQUEST: %.*s\n", h->req_buflen, h->req_buf);
if(h->req_Host && h->req_HostLen > 0) {
const char *port = memchr(h->req_Host, ':', h->req_HostLen);
size_t ip_sz = port ? (port - h->req_Host) : h->req_HostLen;
struct in_addr addr;
char ip_buf[16];
DPRINTF(E_MAXDEBUG, L_HTTP, "Host: %.*s\n", h->req_HostLen, h->req_Host);
if (port) {
const char *ptr = port + 1;
for (i = ip_sz + 2; i < h->req_HostLen; i++) {
if (*ptr > '9' || *ptr < '0')
break;
ptr++;
}
if (i != h->req_HostLen || atoi(port + 1) > 65535) {
DPRINTF(E_ERROR, L_HTTP, "DNS rebinding attack suspected (Host: %.*s)\n", h->req_HostLen, h->req_Host);
Send400(h);
return;
}
}
strncpyt(ip_buf, h->req_Host, MIN(ip_sz + 1, sizeof(ip_buf)));
if (ip_sz >= sizeof(ip_buf) || inet_pton(AF_INET, ip_buf, &addr) <= 0 || !addr.s_addr) {
DPRINTF(E_ERROR, L_HTTP, "DNS rebinding attack suspected (Host: %.*s)\n", h->req_HostLen, h->req_Host);
Send400(h);
return;
}
}
if(strcmp("POST", HttpCommand) == 0)
{
h->req_command = EPost;
ProcessHTTPPOST_upnphttp(h);
}
else if((strcmp("GET", HttpCommand) == 0) || (strcmp("HEAD", HttpCommand) == 0))
{
if( ((strcmp(h->HttpVer, "HTTP/1.1")==0) && !(h->reqflags & FLAG_HOST)) || (h->reqflags & FLAG_INVALID_REQ) )
{
DPRINTF(E_WARN, L_HTTP, "Invalid request, responding ERROR 400. (No Host specified in HTTP headers?)\n");
Send400(h);
return;
}
/* 7.3.33.4 */
else if( (h->reqflags & (FLAG_TIMESEEK|FLAG_PLAYSPEED)) &&
!(h->reqflags & FLAG_RANGE) )
{
DPRINTF(E_WARN, L_HTTP, "DLNA %s requested, responding ERROR 406\n",
h->reqflags&FLAG_TIMESEEK ? "TimeSeek" : "PlaySpeed");
Send406(h);
return;
}
else if(strcmp("GET", HttpCommand) == 0)
{
h->req_command = EGet;
}
else
{
h->req_command = EHead;
}
if(strcmp(ROOTDESC_PATH, HttpUrl) == 0)
{
/* If it's a Xbox360, we might need a special friendly_name to be recognized */
if( h->req_client && h->req_client->type->type == EXbox )
{
char model_sav[2];
i = 0;
memcpy(model_sav, modelnumber, 2);
strcpy(modelnumber, "1");
if( !strchr(friendly_name, ':') )
{
i = strlen(friendly_name);
snprintf(friendly_name+i, FRIENDLYNAME_MAX_LEN-i, ": 1");
}
sendXMLdesc(h, genRootDesc);
if( i )
friendly_name[i] = '\0';
memcpy(modelnumber, model_sav, 2);
}
else if( h->req_client && h->req_client->type->flags & FLAG_SAMSUNG_DCM10 )
{
sendXMLdesc(h, genRootDescSamsung);
}
else
{
sendXMLdesc(h, genRootDesc);
}
}