385 lines
8.5 KiB
C
385 lines
8.5 KiB
C
/*
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* stanzas.c
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*
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* Copyright (C) 2015 James Booth <boothj5@gmail.com>
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*
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* This file is part of Stabber.
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*
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* Stabber 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 3 of the License, or
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* (at your option) any later version.
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*
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* Stabber 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 Stabber. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <glib.h>
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#include "server/stanza.h"
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#include "server/log.h"
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pthread_mutex_t stanzas_lock;
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static GList *stanzas;
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int
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stanzas_contains_id(char *id)
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{
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pthread_mutex_lock(&stanzas_lock);
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GList *curr = stanzas;
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while (curr) {
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XMPPStanza *stanza = curr->data;
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GList *curr_attr = stanza->attrs;
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while (curr_attr) {
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XMPPAttr *attr = curr_attr->data;
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if (g_strcmp0(attr->name, "id") == 0 && g_strcmp0(attr->value, id) == 0) {
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pthread_mutex_unlock(&stanzas_lock);
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return 1;
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}
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curr_attr = g_list_next(curr_attr);
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}
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curr = g_list_next(curr);
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}
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pthread_mutex_unlock(&stanzas_lock);
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return 0;
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}
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void
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stanza_add(XMPPStanza *stanza)
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{
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pthread_mutex_lock(&stanzas_lock);
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stanzas = g_list_append(stanzas, stanza);
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pthread_mutex_unlock(&stanzas_lock);
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}
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void
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stanza_add_child(XMPPStanza *parent, XMPPStanza *child)
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{
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parent->children = g_list_append(parent->children, child);
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}
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XMPPStanza*
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stanza_get_child_by_ns(XMPPStanza *stanza, char *ns)
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{
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if (!stanza) {
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return NULL;
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}
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if (!stanza->children) {
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return NULL;
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}
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GList *curr_child = stanza->children;
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while (curr_child) {
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XMPPStanza *child = curr_child->data;
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if (!child->attrs) {
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return NULL;
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}
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GList *curr_attr = child->attrs;
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while (curr_attr) {
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XMPPAttr *attr = curr_attr->data;
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if ((g_strcmp0(attr->name, "xmlns") == 0) && (g_strcmp0(attr->value, ns) == 0)) {
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return child;
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}
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curr_attr = g_list_next(curr_attr);
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}
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curr_child = g_list_next(curr_child);
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}
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return NULL;
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}
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XMPPStanza*
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stanza_get_child_by_name(XMPPStanza *stanza, char *name)
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{
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if (!stanza) {
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return NULL;
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}
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if (!stanza->children) {
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return NULL;
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}
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GList *curr_child = stanza->children;
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while (curr_child) {
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XMPPStanza *child = curr_child->data;
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if (g_strcmp0(child->name, name) == 0) {
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return child;
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}
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curr_child = g_list_next(curr_child);
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}
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return NULL;
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}
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const char *
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stanza_get_id(XMPPStanza *stanza)
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{
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if (!stanza) {
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return NULL;
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}
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if (!stanza->attrs) {
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return NULL;
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}
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GList *curr_attr = stanza->attrs;
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while (curr_attr) {
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XMPPAttr *attr = curr_attr->data;
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if (g_strcmp0(attr->name, "id") == 0) {
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return attr->value;
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}
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curr_attr = g_list_next(curr_attr);
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}
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return NULL;
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}
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void
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stanza_set_id(XMPPStanza *stanza, const char *id)
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{
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GList *curr_attr = stanza->attrs;
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while (curr_attr) {
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XMPPAttr *attr = curr_attr->data;
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if (g_strcmp0(attr->name, "id") == 0) {
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free(attr->value);
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attr->value = strdup(id);
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return;
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}
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curr_attr = g_list_next(curr_attr);
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}
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XMPPAttr *attrnew = malloc(sizeof(XMPPAttr));
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attrnew->name = strdup("id");
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attrnew->value = strdup(id);
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stanza->attrs = g_list_append(stanza->attrs, attrnew);
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}
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const char *
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stanza_get_attr(XMPPStanza *stanza, const char *name)
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{
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if (!stanza->attrs) {
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return NULL;
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}
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GList *curr_attr = stanza->attrs;
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while (curr_attr) {
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XMPPAttr *attr = curr_attr->data;
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if (g_strcmp0(attr->name, name) == 0) {
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return attr->value;
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}
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curr_attr = g_list_next(curr_attr);
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}
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return NULL;
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}
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const char *
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stanza_get_query_request(XMPPStanza *stanza)
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{
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if (g_strcmp0(stanza->name, "iq") != 0) {
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return NULL;
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}
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const char *type = stanza_get_attr(stanza, "type");
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if (g_strcmp0(type, "get") != 0) {
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return NULL;
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}
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XMPPStanza *query = stanza_get_child_by_name(stanza, "query");
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if (!query) {
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return NULL;
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}
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const char *xmlns = stanza_get_attr(query, "xmlns");
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if (!xmlns) {
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return NULL;
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}
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return xmlns;
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}
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static int
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_xmpp_attr_equal(XMPPAttr *attr1, XMPPAttr *attr2)
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{
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if (g_strcmp0(attr1->name, attr2->name) != 0) {
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return -1;
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}
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if (g_strcmp0(attr1->value, "*") == 0) {
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return 0;
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}
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if (g_strcmp0(attr2->value, "*") == 0) {
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return 0;
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}
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if (g_strcmp0(attr1->value, attr2->value) != 0) {
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return -1;
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}
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return 0;
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}
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static int
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_stanzas_equal(XMPPStanza *first, XMPPStanza *second)
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{
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// check name
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if (g_strcmp0(first->name, second->name) != 0) {
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return -1;
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}
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// check attribute count
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if (g_list_length(first->attrs) != g_list_length(second->attrs)) {
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return -1;
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}
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// check children count
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if (g_list_length(first->children) != g_list_length(second->children)) {
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return -1;
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}
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// check presence of content
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if (!first->content && second->content) {
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return -1;
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}
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if (first->content && !second->content) {
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return -1;
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}
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// check content is exists
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if (first->content) {
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if (g_strcmp0(first->content->str, second->content->str) != 0) {
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return -1;
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}
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}
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// check attributes
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if (first->attrs) {
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GList *first_curr_attr = first->attrs;
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while (first_curr_attr) {
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XMPPAttr *first_attr = (XMPPAttr *)first_curr_attr->data;
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GList *second_found_attr = g_list_find_custom(second->attrs, first_attr, (GCompareFunc)_xmpp_attr_equal);
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if (!second_found_attr) {
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return -1;
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}
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first_curr_attr = g_list_next(first_curr_attr);
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}
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}
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// check children
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if (first->children) {
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GList *first_curr_child = first->children;
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while (first_curr_child) {
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XMPPStanza *first_child = (XMPPStanza *)first_curr_child->data;
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GList *second_found_child = g_list_find_custom(second->children, first_child, (GCompareFunc)_stanzas_equal);
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if (!second_found_child) {
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return -1;
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}
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first_curr_child = g_list_next(first_curr_child);
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}
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}
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return 0;
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}
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int
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stanza_verify_any(XMPPStanza *stanza)
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{
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pthread_mutex_lock(&stanzas_lock);
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if (!stanzas) {
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pthread_mutex_unlock(&stanzas_lock);
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return 0;
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}
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GList *curr = g_list_last(stanzas);
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while (curr) {
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XMPPStanza *curr_stanza = curr->data;
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if (_stanzas_equal(stanza, curr_stanza) == 0) {
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pthread_mutex_unlock(&stanzas_lock);
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return 1;
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}
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curr = g_list_previous(curr);
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}
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pthread_mutex_unlock(&stanzas_lock);
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return 0;
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}
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int
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stanza_verify_last(XMPPStanza *stanza)
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{
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pthread_mutex_lock(&stanzas_lock);
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if (!stanzas) {
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pthread_mutex_unlock(&stanzas_lock);
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return 0;
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}
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GList *last = g_list_last(stanzas);
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if (!last) {
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pthread_mutex_unlock(&stanzas_lock);
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return 0;
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}
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XMPPStanza *last_stanza = (XMPPStanza *)last->data;
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int res = _stanzas_equal(stanza, last_stanza);
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pthread_mutex_unlock(&stanzas_lock);
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if (res == 0) {
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return 1;
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} else {
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return 0;
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}
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}
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static void
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_attrs_free(XMPPAttr *attr)
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{
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if (attr) {
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free(attr->name);
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free(attr->value);
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free(attr);
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}
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}
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void
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stanza_free(XMPPStanza *stanza)
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{
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if (stanza) {
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free(stanza->name);
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if (stanza->content) {
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g_string_free(stanza->content, TRUE);
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}
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g_list_free_full(stanza->attrs, (GDestroyNotify)_attrs_free);
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g_list_free_full(stanza->children, (GDestroyNotify)stanza_free);
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free(stanza);
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}
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}
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void
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stanza_free_all(void)
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{
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pthread_mutex_lock(&stanzas_lock);
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g_list_free_full(stanzas, (GDestroyNotify)stanza_free);
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stanzas = NULL;
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pthread_mutex_unlock(&stanzas_lock);
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}
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