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xmpp.c
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xmpp.c
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#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <assert.h>
#include <ctype.h>
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <sys/time.h>
#include <expat.h>
#include "base64.h"
#include "hash.h"
#include "tls-common.h"
#include "vink-tree.h"
#include "vink.h"
#include "vink-internal.h"
#include "xmpp-internal.h"
#define TRACE 1
#if TRACE
static FILE *trace;
#endif
static void
xmpp_reset_stream (struct vink_xmpp_state *state)
{
XML_ParserReset (state->xml_parser, "utf-8");
XML_SetUserData (state->xml_parser, state);
XML_SetElementHandler (state->xml_parser, xmpp_start_element, xmpp_end_element);
XML_SetCharacterDataHandler (state->xml_parser, xmpp_character_data);
XML_SetStartNamespaceDeclHandler (state->xml_parser, xmpp_start_namespace);
if (state->is_client)
{
xmpp_printf (state,
"<?xml version='1.0'?>"
"<stream:stream xmlns='jabber:client'"
" xmlns:stream='http://etherx.jabber.org/streams'"
" to='%s'"
" version='1.0'>",
state->remote_jid);
}
else if (state->is_initiator)
{
xmpp_printf (state,
"<?xml version='1.0'?>"
"<stream:stream xmlns='jabber:server'"
" xmlns:stream='http://etherx.jabber.org/streams'"
" from='%s'"
" to='%s'"
" xmlns:db='jabber:server:dialback'"
" version='1.0'>",
vink_tree_get_string (VINK_config, "domain"), state->remote_jid);
}
state->xml_tag_level = 0;
}
struct vink_xmpp_state *
vink_xmpp_state_init (int (*write_func)(const void*, size_t, void*),
const char *remote_domain, unsigned int flags,
void *arg)
{
struct vink_xmpp_state *state;
state = malloc (sizeof (*state));
if (!state)
return 0;
#if TRACE
if (!trace)
{
if (flags & VINK_CLIENT)
trace = fopen ("xmpp-client.txt", "w");
else
trace = stderr;
}
#endif
memset (state, 0, sizeof (*state));
if (flags & VINK_CLIENT)
{
state->is_client = 1;
if (-1 == asprintf (&state->jid, "%s@%s",
vink_config ("user"), vink_config ("domain")))
{
free (state);
return 0;
}
}
state->write_func = write_func;
state->write_func_arg = arg;
state->xml_parser = XML_ParserCreateNS ("utf-8", '|');
if (!state->xml_parser)
{
free (state);
return 0;
}
if (remote_domain)
{
state->is_initiator = 1;
state->remote_jid = strdup (remote_domain);
}
xmpp_reset_stream (state);
return state;
}
void
vink_xmpp_set_callbacks (struct vink_xmpp_state *state,
struct vink_xmpp_callbacks *callbacks)
{
state->callbacks = *callbacks;
}
void
vink_xmpp_state_free (struct vink_xmpp_state *state)
{
vink_arena_free (&state->stanza.arena);
free (state->remote_jid);
if (state->backend_data && state->callbacks.backend_free)
state->callbacks.backend_free (state->backend_data);
if (state->tls_session)
gnutls_bye (state->tls_session, GNUTLS_SHUT_WR);
if (state->xml_parser)
XML_ParserFree (state->xml_parser);
}
static void
xmpp_writen (struct vink_xmpp_state *state, const char *data, size_t size)
{
int result;
if (state->fatal_error)
return;
if (state->using_tls && !state->tls_handshake)
{
const char *buf;
size_t offset = 0, to_write;
buf = data;
#if TRACE
fprintf (trace, "LOCAL-TLS (%p): \033[1;35m%.*s\033[0m\n", state, (int) size, buf);
fflush (trace);
#endif
while (offset < size)
{
to_write = size - offset;
if (to_write > 4096)
to_write = 4096;
result = gnutls_record_send (state->tls_session, buf + offset, to_write);
if (result <= 0)
{
if (result < 0)
syslog (LOG_INFO, "Failed to create TLS records: %s", gnutls_strerror (result));
state->fatal_error = gnutls_strerror (result);
return;
}
offset += result;
}
}
else
{
#if TRACE
fprintf (trace, "LOCAL (%p): \033[1;35m%.*s\033[0m\n", state, (int) size, data);
fflush (trace);
#endif
if (-1 == state->write_func (data, size, state->write_func_arg))
{
syslog (LOG_WARNING, "Failed to buffer data for remote host: %s", strerror (errno));
state->fatal_error = strerror (errno);
}
}
}
static void
xmpp_write (struct vink_xmpp_state *state, const char *data)
{
xmpp_writen (state, data, strlen (data));
}
static void
xmpp_printf (struct vink_xmpp_state *state, const char *format, ...)
{
va_list args;
char *buf;
int result;
va_start (args, format);
result = vasprintf (&buf, format, args);
if (result == -1)
{
syslog (LOG_WARNING, "asprintf failed: %s", strerror (errno));
xmpp_stream_error (state, "internal-server-error", 0);
return;
}
xmpp_write (state, buf);
free (buf);
}
int
vink_xmpp_queue_stanza (struct vink_xmpp_state *state, const char *format, ...)
{
struct xmpp_queued_stanza *qs;
int result;
va_list args;
char *buf;
va_start (args, format);
result = vasprintf (&buf, format, args);
if (result == -1)
{
syslog (LOG_WARNING, "asprintf failed: %s", strerror (errno));
return -1;
}
if (state->ready)
{
xmpp_write (state, buf);
free (buf);
}
else
{
qs = malloc (sizeof (*qs));
if (!qs)
{
syslog (LOG_WARNING, "malloc failed: %s", strerror (errno));
free (buf);
return -1;
}
qs->target = 0;
qs->data = buf;
qs->next = 0;
if (!state->first_queued_stanza)
{
state->first_queued_stanza = qs;
state->last_queued_stanza = qs;
}
else
{
state->last_queued_stanza->next = qs;
state->last_queued_stanza = qs;
}
}
return 0;
}
static void
xmpp_stream_error (struct vink_xmpp_state *state, const char *type,
const char *format, ...)
{
va_list args;
char *buf;
int result;
xmpp_printf (state,
"<stream:error>"
"<%s xmlns='urn:ietf:params:xml:ns:xmpp-streams'/>",
type);
if (format)
{
xmpp_write (state,
"<text xmlns='urn:ietf:params:xml:ns:xmpp-streams'"
" xml:lang='en'>");
va_start (args, format);
result = vasprintf (&buf, format, args);
if (result == -1)
{
syslog (LOG_WARNING, "asprintf failed: %s", strerror (errno));
state->fatal_error = strerror (errno);
return;
}
xmpp_write (state, buf);
free (buf);
xmpp_write (state, "</text>");
}
xmpp_write (state, "</stream:error></stream:stream>");
state->fatal_error = type;
}
static void
xmpp_stanza_error (struct vink_xmpp_state *state,
const char *type, const char *id,
const char *error_type,
const char *error_condition,
const char *format, ...)
{
va_list args;
char *buf;
int result;
va_start (args, format);
result = vasprintf (&buf, format, args);
if (result == -1)
{
syslog (LOG_WARNING, "asprintf failed: %s", strerror (errno));
state->fatal_error = strerror (errno);
return;
}
xmpp_printf (state,
"<%1$s type='error' id='%2$s'>"
"<error type='%3$s'>"
"<%4$s/>"
"<text xmlns='urn:ietf:params:xml:ns:xmpp-streams'"
" xml:lang='en'>"
"%5$s"
"</text>"
"</error>"
"</%1$s>",
type, id, error_type, error_condition, buf);
free (buf);
}
static void
xmpp_stanza_unauthorized (struct vink_xmpp_state *state,
const char *type, const char *id)
{
xmpp_stanza_error (state, type, id, "auth", "forbidden", "Authorization required");
}
static char *
plain_auth_data (struct vink_xmpp_state *state)
{
const char *authzid, *authcid, *password;
char *response, *base64_response, *c;
size_t length;
authzid = vink_tree_get_string_default (VINK_config, "authzid", "");
authcid = vink_tree_get_string (VINK_config, "user");
password = vink_tree_get_string (VINK_config, "password");
length = strlen (authzid) + strlen (authcid) + strlen (password) + 2;
response = malloc (length + 1);
if (!response)
{
syslog (LOG_WARNING, "malloc failed: %s", strerror (errno));
xmpp_stream_error (state, "internal-server-error", 0);
return 0;
}
strcpy (response, authzid);
c = strchr (response, 0) + 1;
strcpy (c, authcid);
c = strchr (c, 0) + 1;
strcpy (c, password);
base64_response = base64_encode (response, length);
free (response);
return base64_response;
}
static const struct
{
enum xmpp_stanza_type parent;
enum xmpp_stanza_type next;
const char *tag;
} state_transitions[] =
{
{ xmpp_root, xmpp_ack_request, "urn:xmpp:sm:2|r" },
{ xmpp_root, xmpp_ack_response, "urn:xmpp:sm:2|a" },
{ xmpp_root, xmpp_dialback_result, "jabber:server:dialback|result" },
{ xmpp_root, xmpp_dialback_verify, "jabber:server:dialback|verify" },
{ xmpp_root, xmpp_error, "http://etherx.jabber.org/streams|error" },
{ xmpp_root, xmpp_features, "http://etherx.jabber.org/streams|features" },
{ xmpp_root, xmpp_iq, "jabber:client|iq" },
{ xmpp_root, xmpp_iq, "jabber:server|iq" },
{ xmpp_root, xmpp_message, "jabber:client|message" },
{ xmpp_root, xmpp_message, "jabber:server|message" },
{ xmpp_root, xmpp_presence, "jabber:client|presence" },
{ xmpp_root, xmpp_presence, "jabber:server|presence" },
{ xmpp_root, xmpp_sasl_auth, "urn:ietf:params:xml:ns:xmpp-sasl|auth" },
{ xmpp_root, xmpp_sasl_challenge, "urn:ietf:params:xml:ns:xmpp-sasl|challenge" },
{ xmpp_root, xmpp_sasl_failure, "urn:ietf:params:xml:ns:xmpp-sasl|failure" },
{ xmpp_root, xmpp_sasl_response, "urn:ietf:params:xml:ns:xmpp-sasl|response" },
{ xmpp_root, xmpp_sasl_success, "urn:ietf:params:xml:ns:xmpp-sasl|success" },
{ xmpp_root, xmpp_tls_proceed, "urn:ietf:params:xml:ns:xmpp-tls|proceed" },
{ xmpp_root, xmpp_tls_starttls, "urn:ietf:params:xml:ns:xmpp-tls|starttls" },
{ xmpp_features, xmpp_features_ack,
"http://www.xmpp.org/extensions/xep-0198.html#ns|ack" },
{ xmpp_features, xmpp_features_bind, "urn:ietf:params:xml:ns:xmpp-bind|bind" },
{ xmpp_features, xmpp_features_compression,
"http://jabber.org/features/compress|compression" },
{ xmpp_features, xmpp_features_dialback, "urn:xmpp:features:dialback|dialback" },
{ xmpp_features, xmpp_features_mechanisms,
"urn:ietf:params:xml:ns:xmpp-sasl|mechanisms" },
{ xmpp_features, xmpp_features_session, "urn:ietf:params:xml:ns:xmpp-session|session" },
{ xmpp_features, xmpp_features_starttls, "urn:ietf:params:xml:ns:xmpp-tls|starttls" },
{ xmpp_iq, xmpp_iq_bind, "urn:ietf:params:xml:ns:xmpp-bind|bind" },
{ xmpp_iq, xmpp_iq_discovery_info, "http://jabber.org/protocol/disco#info|query" },
{ xmpp_iq, xmpp_iq_discovery_items, "http://jabber.org/protocol/disco#items|query" },
{ xmpp_message, xmpp_message_body, "jabber:client|body" },
{ xmpp_message, xmpp_message_body, "jabber:server|body" },
{ xmpp_message, xmpp_message_event, "http://jabber.org/protocol/pubsub#event|event" },
{ xmpp_message, xmpp_message_requect_receipt, "urn:xmpp:receipts|request" },
{ xmpp_presence, xmpp_presence_show, "jabber:server|show" },
{ xmpp_presence, xmpp_presence_show, "jabber:server|show" },
{ xmpp_features_mechanisms, xmpp_features_mechanisms_mechanism,
"urn:ietf:params:xml:ns:xmpp-sasl|mechanism" },
{ xmpp_iq_bind, xmpp_iq_bind_jid, "urn:ietf:params:xml:ns:xmpp-bind|jid" },
{ xmpp_iq_discovery_info, xmpp_iq_discovery_info_feature,
"http://jabber.org/protocol/disco#info|feature" },
{ xmpp_message_event, xmpp_message_event_items,
"http://jabber.org/protocol/pubsub#event|items" },
{ xmpp_message_event_items, xmpp_message_event_items_item,
"http://jabber.org/protocol/pubsub#event|item" }
};
static void XMLCALL
xmpp_start_element (void *user_data, const XML_Char *name,
const XML_Char **atts)
{
struct vink_xmpp_state *state = user_data;
const XML_Char **attr;
struct xmpp_stanza *stanza;
struct vink_arena *arena;
stanza = &state->stanza;
arena = &stanza->arena;
if (state->xml_tag_level == 0)
{
if (strcmp (name, "http://etherx.jabber.org/streams|stream"))
{
xmpp_stream_error (state, "invalid-namespace",
"Expected stream tag in "
"http://etherx.jabber.org/streams namespace");
return;
}
state->remote_major_version = 0;
state->remote_minor_version = 0;
for (attr = atts; *attr; attr += 2)
{
if (!strcmp (attr[0], "version"))
{
if (2 != sscanf (attr[1], "%u.%u", &state->remote_major_version,
&state->remote_minor_version))
{
xmpp_stream_error (state, "unspported-version",
"Unable to parse stream version");
return;
}
}
else if (!strcmp (attr[0], "to"))
{
if (strcmp (attr[1], vink_tree_get_string (VINK_config, "domain")))
{
xmpp_stream_error (state, "host-unknown", 0);
return;
}
}
else if (!strcmp (attr[0], "id"))
state->remote_stream_id = strdup (attr[1]);
}
/* Clamp remote version to maximum version supported by us */
if (state->remote_major_version > 1)
{
xmpp_stream_error (state, "unsupported-version",
"Major version %d not supported. Max is 1.",
state->remote_major_version);
return;
}
if (state->remote_major_version == 1 && state->remote_minor_version > 0)
{
state->remote_major_version = 1;
state->remote_minor_version = 1;
}
if (state->remote_is_client)
{
xmpp_gen_id (state->stream_id);
xmpp_printf (state,
"<?xml version='1.0'?>"
"<stream:stream xmlns='jabber:client' "
"xmlns:stream='http://etherx.jabber.org/streams' "
"from='%s' id='%s'",
vink_tree_get_string (VINK_config, "domain"), state->stream_id);
if (state->remote_major_version || state->remote_minor_version)
xmpp_printf (state, " version='%d.%d'>",
state->remote_major_version,
state->remote_minor_version);
else
xmpp_write (state, ">");
if (state->remote_major_version >= 1)
{
xmpp_write (state, "<stream:features>");
if (!state->using_tls && state->remote_major_version >= 1)
xmpp_write (state,
"<starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'/>");
if (!state->remote_identified)
xmpp_write (state,
"<mechanisms xmlns='urn:ietf:params:xml:ns:xmpp-sasl'>"
/*"<mechanism>DIGEST-MD5</mechanism>"*/
"<mechanism>PLAIN</mechanism>"
"</mechanisms>");
if (state->remote_is_client)
xmpp_write (state, "<bind xmlns='urn:ietf:params:xml:ns:xmpp-bind'/>");
xmpp_write (state, "</stream:features>");
}
}
else if (!state->is_initiator)
{
xmpp_gen_id (state->stream_id);
xmpp_printf (state,
"<?xml version='1.0'?>"
"<stream:stream xmlns='jabber:server' "
"xmlns:stream='http://etherx.jabber.org/streams' "
"xmlns:db='jabber:server:dialback' "
"from='%s' id='%s' ",
vink_tree_get_string (VINK_config, "domain"), state->stream_id);
if (state->remote_major_version || state->remote_minor_version)
xmpp_printf (state, " version='%d.%d'>",
state->remote_major_version,
state->remote_minor_version);
else
xmpp_write (state, ">");
if (state->remote_major_version >= 1)
{
xmpp_write (state, "<stream:features>");
if (!state->using_tls)
{
xmpp_write (state,
"<starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'>"
"<required/>"
"</starttls>");
if (!state->remote_identified)
xmpp_write (state, "<dialback xmlns='urn:xmpp:features:dialback'/>");
}
else if (!state->remote_identified)
{
xmpp_write (state,
"<mechanisms xmlns='urn:ietf:params:xml:ns:xmpp-sasl'>"
"<mechanism>EXTERNAL</mechanism>"
"</mechanisms>");
}
xmpp_write (state, "</stream:features>");
}
}
else
{
assert (state->is_initiator);
if (!state->remote_stream_id)
{
xmpp_stream_error (state, "invalid-id", 0);
return;
}
}
}
else
{
enum xmpp_stanza_type parent;
enum xmpp_stanza_type next = xmpp_unknown;
size_t i;
if (state->xml_tag_level == 1)
{
memset (&state->stanza, 0, sizeof (state->stanza));
parent = xmpp_root;
for (attr = atts; *attr; attr += 2)
{
if (!strcmp (attr[0], "id"))
stanza->id = vink_arena_strdup (arena, attr[1]);
else if (!strcmp (attr[0], "from"))
stanza->from = vink_arena_strdup (arena, attr[1]);
else if (!strcmp (attr[0], "to"))
{
if (!state->remote_is_client)
{
char *jid_buf;
struct vink_xmpp_jid jid;
jid_buf = strdupa (attr[1]);
vink_xmpp_parse_jid (&jid, jid_buf);
if (strcmp (jid.domain, vink_tree_get_string (VINK_config, "domain")))
{
xmpp_stream_error (state, "host-unknown",
"Unknown domain '%s'", jid.domain);
return;
}
}
stanza->to = vink_arena_strdup (arena, attr[1]);
}
}
}
else
parent = stanza->types[state->xml_tag_level - 2];
for (i = 0; i < ARRAY_SIZE (state_transitions); ++i)
{
if (state_transitions[i].parent == parent
&& !strcmp (state_transitions[i].tag, name))
{
next = state_transitions[i].next;
break;
}
}
if (next == xmpp_unknown)
{
if (parent == xmpp_root)
{
xmpp_stream_error (state, "unsupported-stanza-type",
"Unknown element '%s'", name);
return;
}
#if TRACE
fprintf (trace,
"\033[31;1mUnhandled element: '%s', parent = %d\033[0m\n",
name, parent);
#endif
}
stanza->types[state->xml_tag_level - 1] = next;
switch (next)
{
case xmpp_dialback_verify:
{
struct xmpp_dialback_verify *pdv = &stanza->u.dialback_verify;
for (attr = atts; *attr; attr += 2)
{
if (!strcmp (attr[0], "type"))
pdv->type = vink_arena_strdup (arena, attr[1]);
}
}
break;
case xmpp_dialback_result:
{
struct xmpp_dialback_result *pdr = &stanza->u.dialback_result;
for (attr = atts; *attr; attr += 2)
{
if (!strcmp (attr[0], "type"))
pdr->type = vink_arena_strdup (arena, attr[1]);
}
}
break;
case xmpp_sasl_auth:
if (state->is_initiator)
{
xmpp_stream_error (state, "bad-format",
"Receiving entity attempted to initiate SASL");
return;
}
for (attr = atts; *attr; attr += 2)
{
if (!strcmp (attr[0], "mechanism"))
stanza->u.auth.mechanism = vink_arena_strdup (arena, attr[1]);
}
break;
case xmpp_sasl_challenge:
if (!state->is_initiator)
{
xmpp_stream_error (state, "bad-format", "Initiating entity sent SASL challenge");
return;
}
break;
case xmpp_sasl_response:
if (state->is_initiator)
{
xmpp_stream_error (state, "bad-format", "Receiving entity attempted to initiate SASL");
return;
}
for (attr = atts; *attr; attr += 2)
{
if (!strcmp (attr[0], "mechanism"))
stanza->u.auth.mechanism = vink_arena_strdup (arena, attr[1]);
}
break;
case xmpp_sasl_success:
if (!state->is_initiator)
{
xmpp_stream_error (state, "bad-format", "Initiating entity sent SASL success");
return;
}
break;
case xmpp_sasl_failure:
if (!state->is_initiator)
{
xmpp_stream_error (state, "bad-format", "Initiating entity sent SASL failure");
return;
}
break;
case xmpp_iq:
for (attr = atts; *attr; attr += 2)
{
if (!strcmp (attr[0], "type"))
stanza->u.iq.type = vink_arena_strdup (arena, attr[1]);
}
break;
case xmpp_features_ack: stanza->u.features.ack = 1; break;
case xmpp_features_bind: stanza->u.features.bind = 1; break;
case xmpp_features_dialback: stanza->u.features.dialback = 1; break;
case xmpp_features_session: stanza->u.features.session = 1; break;
case xmpp_features_starttls: stanza->u.features.starttls = 1; break;
case xmpp_iq_discovery_info:
stanza->u.iq.disco_info = 1;
break;
case xmpp_iq_discovery_items:
stanza->u.iq.disco_items = 1;
break;
case xmpp_iq_bind:
stanza->u.iq.bind = 1;
break;
case xmpp_message_requect_receipt:
stanza->u.message.request_receipt = 1;
break;
case xmpp_iq_discovery_info_feature:
{
const char *var = 0;
for (attr = atts; *attr; attr += 2)
{
if (!strcmp (attr[0], "var"))
{
var = attr[1];
break;
}
}
if (!var)
{
xmpp_stream_error (state, "bad-format", "Missing 'var' in feature element");
return;
}
#define CHECK_FEATURE(str, symbol) \
if (!strcmp (var, str)) state->feature_##symbol = 1;
CHECK_FEATURE ("google:jingleinfo", google_jingleinfo);
CHECK_FEATURE ("http://jabber.org/protocol/address", jabber_address);
CHECK_FEATURE ("http://jabber.org/protocol/commands", jabber_commands);
CHECK_FEATURE ("http://jabber.org/protocol/disco#info", jabber_disco_info);
CHECK_FEATURE ("http://jabber.org/protocol/disco#items", jabber_disco_items);
CHECK_FEATURE ("http://jabber.org/protocol/offline", jabber_offline);
CHECK_FEATURE ("http://jabber.org/protocol/pubsub", jabber_pubsub);
CHECK_FEATURE ("http://jabber.org/protocol/pubsub#collections", jabber_pubsub_collections);
CHECK_FEATURE ("http://jabber.org/protocol/pubsub#config-node", jabber_pubsub_config_node);
CHECK_FEATURE ("http://jabber.org/protocol/pubsub#create-and-configure", jabber_pubsub_create_and_configure);
CHECK_FEATURE ("http://jabber.org/protocol/pubsub#create-nodes", jabber_pubsub_create_nodes);
CHECK_FEATURE ("http://jabber.org/protocol/pubsub#default_access_model_open", jabber_pubsub_default_access_model_open);
CHECK_FEATURE ("http://jabber.org/protocol/pubsub#delete-nodes", jabber_pubsub_delete_nodes);
CHECK_FEATURE ("http://jabber.org/protocol/pubsub#get-pending", jabber_pubsub_get_pending);
CHECK_FEATURE ("http://jabber.org/protocol/pubsub#instant-nodes", jabber_pubsub_instant_nodes);
CHECK_FEATURE ("http://jabber.org/protocol/pubsub#item-ids", jabber_pubsub_item_ids);
CHECK_FEATURE ("http://jabber.org/protocol/pubsub#manage-subscriptions", jabber_pubsub_manage_subscriptions);
CHECK_FEATURE ("http://jabber.org/protocol/pubsub#meta-data", jabber_pubsub_meta_data);
CHECK_FEATURE ("http://jabber.org/protocol/pubsub#modify-affiliations", jabber_pubsub_modify_affiliations);
CHECK_FEATURE ("http://jabber.org/protocol/pubsub#multi-subscribe", jabber_pubsub_multi_subscribe);
CHECK_FEATURE ("http://jabber.org/protocol/pubsub#outcast-affiliation", jabber_pubsub_outcast_affiliation);
CHECK_FEATURE ("http://jabber.org/protocol/pubsub#persistent-items", jabber_pubsub_persistent_items);
CHECK_FEATURE ("http://jabber.org/protocol/pubsub#presence-notifications", jabber_pubsub_presence_notifications);
CHECK_FEATURE ("http://jabber.org/protocol/pubsub#publish", jabber_pubsub_publish);
CHECK_FEATURE ("http://jabber.org/protocol/pubsub#publisher-affiliation", jabber_pubsub_publisher_affiliation);
CHECK_FEATURE ("http://jabber.org/protocol/pubsub#purge-nodes", jabber_pubsub_purge_nodes);
CHECK_FEATURE ("http://jabber.org/protocol/pubsub#retract-items", jabber_pubsub_retract_items);
CHECK_FEATURE ("http://jabber.org/protocol/pubsub#retrieve-affiliations", jabber_pubsub_retrieve_affiliations);
CHECK_FEATURE ("http://jabber.org/protocol/pubsub#retrieve-default", jabber_pubsub_retrieve_default);
CHECK_FEATURE ("http://jabber.org/protocol/pubsub#retrieve-items", jabber_pubsub_retrieve_items);
CHECK_FEATURE ("http://jabber.org/protocol/pubsub#retrieve-subscriptions", jabber_pubsub_retrieve_subscriptions);
CHECK_FEATURE ("http://jabber.org/protocol/pubsub#subscribe", jabber_pubsub_subscribe);
CHECK_FEATURE ("http://jabber.org/protocol/pubsub#subscription-options", jabber_pubsub_subscription_options);
CHECK_FEATURE ("http://jabber.org/protocol/rsm", jabber_rsm);
CHECK_FEATURE ("jabber:iq:last", jabber_iq_last);
CHECK_FEATURE ("jabber:iq:privacy", jabber_iq_privacy);
CHECK_FEATURE ("jabber:iq:private", jabber_iq_private);
CHECK_FEATURE ("jabber:iq:register", jabber_iq_register);
CHECK_FEATURE ("jabber:iq:roster", jabber_iq_roster);
CHECK_FEATURE ("jabber:iq:time", jabber_iq_time);
CHECK_FEATURE ("jabber:iq:version", jabber_iq_version);
CHECK_FEATURE ("urn:xmpp:ping", urn_xmpp_ping);
CHECK_FEATURE ("vcard-temp", vcard_temp);
#undef CHECK_FEATURE
}
case xmpp_message_event_items_item:
{
struct xmpp_message *msg;
struct xmpp_pubsub_item* item;
msg = &stanza->u.message;
item = vink_arena_calloc (arena, sizeof (*item));
if (msg->first_item)
msg->last_item->next = item;
else
msg->first_item = item;
msg->last_item = item;
}
break;
default:;
}
}
++state->xml_tag_level;
}
static void XMLCALL
xmpp_end_element (void *user_data, const XML_Char *name)
{
struct vink_xmpp_state *state = user_data;
if (!state->xml_tag_level)
{
xmpp_stream_error (state, "invalid-xml", "Too many end tags");
return;
}
--state->xml_tag_level;
if (state->xml_tag_level == 0)
state->stream_finished = 1;
else if (state->xml_tag_level == 1
&& state->stanza.types[0] != xmpp_unknown)
xmpp_process_stanza (state);
}
static void XMLCALL
xmpp_character_data (void *user_data, const XML_Char *str, int len)
{
struct vink_xmpp_state *state;
struct xmpp_stanza *stanza;
struct vink_arena *arena;
enum xmpp_stanza_type type;
state = user_data;
stanza = &state->stanza;
arena = &stanza->arena;
if (state->xml_tag_level < 2
|| state->xml_tag_level >= 10)
return;
type = stanza->types[state->xml_tag_level - 2];
switch (type)
{
case xmpp_features_mechanisms_mechanism:
{
struct xmpp_features *pf = &state->stanza.u.features;