/* Remove any replies that have no corresponding request and that
* are equal to the default. */
static void strip_default_capabilities(List *caps, List *req) {
long i;
Capability *cap;
int count;
/* Hmm, this is an O(N*N) operation, which may be bad. */
i = 0;
while (i < gwlist_len(caps)) {
cap = gwlist_get(caps, i);
count = wsp_cap_count(req, cap->id, cap->name);
if (count == 0 && is_default_cap(cap)) {
gwlist_delete(caps, i, 1);
wsp_cap_destroy(cap);
} else {
i++;
}
}
}
static void sanitize_capabilities(List *caps, WSPMachine *m) {
long i;
Capability *cap;
unsigned long ui;
for (i = 0; i < gwlist_len(caps); i++) {
cap = gwlist_get(caps, i);
/* We only know numbered capabilities. Let the application
* layer negotiate whatever it wants for unknown ones. */
if (cap->name != NULL)
continue;
switch (cap->id) {
case WSP_CAPS_CLIENT_SDU_SIZE:
/* Check if it's a valid uintvar. The value is the
* max SDU size we will send, and there's no
* internal limit to that, so accept any value. */
if (cap->data != NULL &&
octstr_extract_uintvar(cap->data, &ui, 0) < 0)
goto bad_cap;
else
m->client_SDU_size = ui;
break;
case WSP_CAPS_SERVER_SDU_SIZE:
/* Check if it's a valid uintvar */
if (cap->data != NULL &&
(octstr_extract_uintvar(cap->data, &ui, 0) < 0))
goto bad_cap;
/* XXX Our MRU is not quite unlimited, since we
* use signed longs in the library functions --
* should we make sure we limit the reply value
* to LONG_MAX? (That's already a 2GB packet) */
break;
case WSP_CAPS_PROTOCOL_OPTIONS:
/* Currently we don't support any Push, nor
* session resume, nor acknowledgement headers,
* so make sure those bits are not set. */
if (cap->data != NULL && octstr_len(cap->data) > 0
&& (octstr_get_char(cap->data, 0) & 0xf0) != 0) {
warning(0, "WSP: Application layer tried to "
"negotiate protocol options.");
octstr_set_bits(cap->data, 0, 4, 0);
}
break;
case WSP_CAPS_EXTENDED_METHODS:
/* XXX Check format here */
break;
case WSP_CAPS_HEADER_CODE_PAGES:
/* We don't support any yet, so don't let this
* be negotiated. */
if (cap->data)
goto bad_cap;
break;
}
continue;
bad_cap:
error(0, "WSP: Found illegal value in capabilities reply.");
wsp_cap_dump(cap);
gwlist_delete(caps, i, 1);
i--;
wsp_cap_destroy(cap);
continue;
}
}
static void wsp_cap_destroy_item(void *cap) {
wsp_cap_destroy(cap);
}