static void
ProcessHTTPSubscribe_upnphttp(struct upnphttp * h, const char * path)
{
const char * sid;
syslog(LOG_DEBUG, "ProcessHTTPSubscribe %s", path);
syslog(LOG_DEBUG, "Callback '%.*s' Timeout=%d",
h->req_CallbackLen, h->req_Callback, h->req_Timeout);
syslog(LOG_DEBUG, "SID '%.*s'", h->req_SIDLen, h->req_SID);
if(!h->req_Callback && !h->req_SID) {
/* 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);
SendResp_upnphttp(h);
CloseSocket_upnphttp(h);
} else {
/* - add to the subscriber list
* - respond HTTP/x.x 200 OK
* - Send the initial event message */
/* Server:, SID:; Timeout: Second-(xx|infinite) */
/* Check that the callback URL is on the same IP as
* the request, and not on the internet, nor on ourself (DOS attack ?) */
if(h->req_Callback) {
if(checkCallbackURL(h)) {
sid = upnpevents_addSubscriber(path, h->req_Callback,
h->req_CallbackLen, h->req_Timeout);
h->respflags = FLAG_TIMEOUT;
if(sid) {
syslog(LOG_DEBUG, "generated sid=%s", sid);
h->respflags |= FLAG_SID;
h->req_SID = sid;
h->req_SIDLen = strlen(sid);
}
BuildResp_upnphttp(h, 0, 0);
} else {
syslog(LOG_WARNING, "Invalid Callback in SUBSCRIBE %.*s",
h->req_CallbackLen, h->req_Callback);
BuildResp2_upnphttp(h, 412, "Precondition Failed", 0, 0);
}
} else {
/* subscription renew */
/* 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. */
if(renewSubscription(h->req_SID, h->req_SIDLen, h->req_Timeout) < 0) {
BuildResp2_upnphttp(h, 412, "Precondition Failed", 0, 0);
} else {
h->respflags = FLAG_TIMEOUT;
BuildResp_upnphttp(h, 0, 0);
}
}
SendResp_upnphttp(h);
CloseSocket_upnphttp(h);
}
}
static void
ProcessHTTPSubscribe_upnphttp(struct upnphttp * h, const char * path)
{
const char * sid;
syslog(LOG_DEBUG, "ProcessHTTPSubscribe %s", path);
syslog(LOG_DEBUG, "Callback '%.*s' Timeout=%d",
h->req_CallbackLen, h->req_buf + h->req_CallbackOff,
h->req_Timeout);
syslog(LOG_DEBUG, "SID '%.*s'", h->req_SIDLen, h->req_buf + h->req_SIDOff);
if((h->req_CallbackOff <= 0) && (h->req_SIDOff <= 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);
SendRespAndClose_upnphttp(h);
} else {
/* - add to the subscriber list
* - respond HTTP/x.x 200 OK
* - Send the initial event message */
/* Server:, SID:; Timeout: Second-(xx|infinite) */
/* Check that the callback URL is on the same IP as
* the request, and not on the internet, nor on ourself (DOS attack ?) */
if(h->req_CallbackOff > 0) {
#ifdef UPNP_STRICT
/* SID: and Callback: are incompatible */
if(h->req_SIDOff > 0) {
syslog(LOG_WARNING, "Both Callback: and SID: in SUBSCRIBE");
BuildResp2_upnphttp(h, 400, "Incompatible header fields", 0, 0);
/* "NT: upnp:event" header is mandatory */
} else if(h->req_NTOff <= 0 || h->req_NTLen != 10 ||
0 != memcmp("upnp:event", h->req_buf + h->req_NTOff, 10)) {
syslog(LOG_WARNING, "Invalid NT in SUBSCRIBE %.*s",
h->req_NTLen, h->req_buf + h->req_NTOff);
BuildResp2_upnphttp(h, 412, "Precondition Failed", 0, 0);
} else
#endif
if(checkCallbackURL(h)) {
sid = upnpevents_addSubscriber(path, h->req_buf + h->req_CallbackOff,
h->req_CallbackLen, h->req_Timeout);
h->respflags = FLAG_TIMEOUT;
if(sid) {
syslog(LOG_DEBUG, "generated sid=%s", sid);
h->respflags |= FLAG_SID;
h->res_SID = sid;
}
BuildResp_upnphttp(h, 0, 0);
} else {
syslog(LOG_WARNING, "Invalid Callback in SUBSCRIBE %.*s",
h->req_CallbackLen, h->req_buf + h->req_CallbackOff);
BuildResp2_upnphttp(h, 412, "Precondition Failed", 0, 0);
}
} else {
/* subscription renew */
/* 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. */
#ifdef UPNP_STRICT
/* SID: and NT: headers are incompatibles */
if(h->req_NTOff > 0) {
syslog(LOG_WARNING, "Both NT: and SID: in SUBSCRIBE");
BuildResp2_upnphttp(h, 400, "Incompatible header fields", 0, 0);
} else
#endif
if(renewSubscription(h->req_buf + h->req_SIDOff, h->req_SIDLen,
h->req_Timeout) < 0) {
BuildResp2_upnphttp(h, 412, "Precondition Failed", 0, 0);
} else {
h->respflags = FLAG_TIMEOUT;
BuildResp_upnphttp(h, 0, 0);
}
}
SendRespAndClose_upnphttp(h);
}
}
