mirror of https://github.com/proxmox/mirror_qemu
773 lines
23 KiB
C
773 lines
23 KiB
C
/*
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* Tester for VSCARD protocol, client side.
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*
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* Can be used with ccid-card-passthru.
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*
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* Copyright (c) 2011 Red Hat.
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* Written by Alon Levy.
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*
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* This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
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* See the COPYING.LIB file in the top-level directory.
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*/
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#ifndef _WIN32
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#include <netdb.h>
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#define closesocket(x) close(x)
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#endif
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#include "qemu-common.h"
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#include "vscard_common.h"
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#include "vreader.h"
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#include "vcard_emul.h"
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#include "vevent.h"
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static int verbose;
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static void
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print_byte_array(
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uint8_t *arrBytes,
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unsigned int nSize
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) {
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int i;
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for (i = 0; i < nSize; i++) {
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printf("%02X ", arrBytes[i]);
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}
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printf("\n");
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}
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static void
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print_usage(void) {
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printf("vscclient [-c <certname> .. -e <emul_args> -d <level>%s] "
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"<host> <port>\n",
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#ifdef USE_PASSTHRU
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" -p");
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printf(" -p use passthrough mode\n");
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#else
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"");
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#endif
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vcard_emul_usage();
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}
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static GIOChannel *channel_socket;
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static GByteArray *socket_to_send;
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static CompatGMutex socket_to_send_lock;
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static guint socket_tag;
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static void
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update_socket_watch(void);
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static gboolean
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do_socket_send(GIOChannel *source,
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GIOCondition condition,
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gpointer data)
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{
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gsize bw;
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GError *err = NULL;
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g_return_val_if_fail(socket_to_send->len != 0, FALSE);
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g_return_val_if_fail(condition & G_IO_OUT, FALSE);
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g_io_channel_write_chars(channel_socket,
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(gchar *)socket_to_send->data, socket_to_send->len, &bw, &err);
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if (err != NULL) {
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g_error("Error while sending socket %s", err->message);
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return FALSE;
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}
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g_byte_array_remove_range(socket_to_send, 0, bw);
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if (socket_to_send->len == 0) {
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update_socket_watch();
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return FALSE;
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}
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return TRUE;
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}
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static gboolean
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socket_prepare_sending(gpointer user_data)
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{
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update_socket_watch();
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return FALSE;
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}
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static int
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send_msg(
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VSCMsgType type,
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uint32_t reader_id,
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const void *msg,
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unsigned int length
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) {
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VSCMsgHeader mhHeader;
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g_mutex_lock(&socket_to_send_lock);
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if (verbose > 10) {
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printf("sending type=%d id=%u, len =%u (0x%x)\n",
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type, reader_id, length, length);
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}
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mhHeader.type = htonl(type);
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mhHeader.reader_id = 0;
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mhHeader.length = htonl(length);
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g_byte_array_append(socket_to_send, (guint8 *)&mhHeader, sizeof(mhHeader));
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g_byte_array_append(socket_to_send, (guint8 *)msg, length);
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g_idle_add(socket_prepare_sending, NULL);
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g_mutex_unlock(&socket_to_send_lock);
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return 0;
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}
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static VReader *pending_reader;
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static CompatGMutex pending_reader_lock;
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static CompatGCond pending_reader_condition;
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#define MAX_ATR_LEN 40
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static gpointer
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event_thread(gpointer arg)
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{
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unsigned char atr[MAX_ATR_LEN];
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int atr_len;
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VEvent *event;
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unsigned int reader_id;
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while (1) {
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const char *reader_name;
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event = vevent_wait_next_vevent();
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if (event == NULL) {
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break;
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}
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reader_id = vreader_get_id(event->reader);
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if (reader_id == VSCARD_UNDEFINED_READER_ID &&
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event->type != VEVENT_READER_INSERT) {
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/* ignore events from readers qemu has rejected */
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/* if qemu is still deciding on this reader, wait to see if need to
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* forward this event */
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g_mutex_lock(&pending_reader_lock);
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if (!pending_reader || (pending_reader != event->reader)) {
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/* wasn't for a pending reader, this reader has already been
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* rejected by qemu */
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g_mutex_unlock(&pending_reader_lock);
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vevent_delete(event);
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continue;
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}
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/* this reader hasn't been told its status from qemu yet, wait for
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* that status */
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while (pending_reader != NULL) {
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g_cond_wait(&pending_reader_condition, &pending_reader_lock);
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}
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g_mutex_unlock(&pending_reader_lock);
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/* now recheck the id */
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reader_id = vreader_get_id(event->reader);
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if (reader_id == VSCARD_UNDEFINED_READER_ID) {
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/* this reader was rejected */
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vevent_delete(event);
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continue;
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}
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/* reader was accepted, now forward the event */
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}
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switch (event->type) {
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case VEVENT_READER_INSERT:
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/* tell qemu to insert a new CCID reader */
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/* wait until qemu has responded to our first reader insert
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* before we send a second. That way we won't confuse the responses
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* */
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g_mutex_lock(&pending_reader_lock);
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while (pending_reader != NULL) {
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g_cond_wait(&pending_reader_condition, &pending_reader_lock);
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}
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pending_reader = vreader_reference(event->reader);
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g_mutex_unlock(&pending_reader_lock);
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reader_name = vreader_get_name(event->reader);
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if (verbose > 10) {
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printf(" READER INSERT: %s\n", reader_name);
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}
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send_msg(VSC_ReaderAdd,
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reader_id, /* currerntly VSCARD_UNDEFINED_READER_ID */
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NULL, 0 /* TODO reader_name, strlen(reader_name) */);
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break;
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case VEVENT_READER_REMOVE:
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/* future, tell qemu that an old CCID reader has been removed */
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if (verbose > 10) {
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printf(" READER REMOVE: %u\n", reader_id);
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}
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send_msg(VSC_ReaderRemove, reader_id, NULL, 0);
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break;
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case VEVENT_CARD_INSERT:
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/* get the ATR (intended as a response to a power on from the
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* reader */
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atr_len = MAX_ATR_LEN;
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vreader_power_on(event->reader, atr, &atr_len);
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/* ATR call functions as a Card Insert event */
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if (verbose > 10) {
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printf(" CARD INSERT %u: ", reader_id);
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print_byte_array(atr, atr_len);
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}
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send_msg(VSC_ATR, reader_id, atr, atr_len);
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break;
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case VEVENT_CARD_REMOVE:
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/* Card removed */
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if (verbose > 10) {
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printf(" CARD REMOVE %u:\n", reader_id);
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}
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send_msg(VSC_CardRemove, reader_id, NULL, 0);
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break;
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default:
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break;
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}
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vevent_delete(event);
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}
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return NULL;
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}
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static unsigned int
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get_id_from_string(char *string, unsigned int default_id)
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{
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unsigned int id = atoi(string);
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/* don't accidentally swith to zero because no numbers have been supplied */
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if ((id == 0) && *string != '0') {
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return default_id;
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}
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return id;
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}
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static int
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on_host_init(VSCMsgHeader *mhHeader, VSCMsgInit *incoming)
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{
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uint32_t *capabilities = (incoming->capabilities);
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int num_capabilities =
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1 + ((mhHeader->length - sizeof(VSCMsgInit)) / sizeof(uint32_t));
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int i;
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incoming->version = ntohl(incoming->version);
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if (incoming->version != VSCARD_VERSION) {
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if (verbose > 0) {
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printf("warning: host has version %d, we have %d\n",
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verbose, VSCARD_VERSION);
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}
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}
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if (incoming->magic != VSCARD_MAGIC) {
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printf("unexpected magic: got %d, expected %d\n",
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incoming->magic, VSCARD_MAGIC);
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return -1;
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}
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for (i = 0 ; i < num_capabilities; ++i) {
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capabilities[i] = ntohl(capabilities[i]);
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}
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/* Future: check capabilities */
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/* remove whatever reader might be left in qemu,
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* in case of an unclean previous exit. */
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send_msg(VSC_ReaderRemove, VSCARD_MINIMAL_READER_ID, NULL, 0);
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/* launch the event_thread. This will trigger reader adds for all the
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* existing readers */
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g_thread_new("vsc/event", event_thread, NULL);
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return 0;
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}
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enum {
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STATE_HEADER,
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STATE_MESSAGE,
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};
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#define APDUBufSize 270
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static gboolean
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do_socket_read(GIOChannel *source,
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GIOCondition condition,
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gpointer data)
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{
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int rv;
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int dwSendLength;
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int dwRecvLength;
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uint8_t pbRecvBuffer[APDUBufSize];
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static uint8_t pbSendBuffer[APDUBufSize];
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VReaderStatus reader_status;
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VReader *reader = NULL;
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static VSCMsgHeader mhHeader;
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VSCMsgError *error_msg;
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GError *err = NULL;
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static gchar *buf;
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static gsize br, to_read;
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static int state = STATE_HEADER;
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if (state == STATE_HEADER && to_read == 0) {
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buf = (gchar *)&mhHeader;
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to_read = sizeof(mhHeader);
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}
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if (to_read > 0) {
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g_io_channel_read_chars(source, (gchar *)buf, to_read, &br, &err);
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if (err != NULL) {
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g_error("error while reading: %s", err->message);
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}
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buf += br;
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to_read -= br;
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if (to_read != 0) {
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return TRUE;
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}
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}
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if (state == STATE_HEADER) {
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mhHeader.type = ntohl(mhHeader.type);
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mhHeader.reader_id = ntohl(mhHeader.reader_id);
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mhHeader.length = ntohl(mhHeader.length);
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if (verbose) {
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printf("Header: type=%d, reader_id=%u length=%d (0x%x)\n",
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mhHeader.type, mhHeader.reader_id, mhHeader.length,
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mhHeader.length);
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}
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switch (mhHeader.type) {
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case VSC_APDU:
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case VSC_Flush:
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case VSC_Error:
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case VSC_Init:
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buf = (gchar *)pbSendBuffer;
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to_read = mhHeader.length;
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state = STATE_MESSAGE;
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return TRUE;
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default:
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fprintf(stderr, "Unexpected message of type 0x%X\n", mhHeader.type);
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return FALSE;
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}
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}
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if (state == STATE_MESSAGE) {
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switch (mhHeader.type) {
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case VSC_APDU:
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if (verbose) {
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printf(" recv APDU: ");
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print_byte_array(pbSendBuffer, mhHeader.length);
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}
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/* Transmit received APDU */
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dwSendLength = mhHeader.length;
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dwRecvLength = sizeof(pbRecvBuffer);
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reader = vreader_get_reader_by_id(mhHeader.reader_id);
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reader_status = vreader_xfr_bytes(reader,
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pbSendBuffer, dwSendLength,
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pbRecvBuffer, &dwRecvLength);
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if (reader_status == VREADER_OK) {
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mhHeader.length = dwRecvLength;
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if (verbose) {
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printf(" send response: ");
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print_byte_array(pbRecvBuffer, mhHeader.length);
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}
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send_msg(VSC_APDU, mhHeader.reader_id,
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pbRecvBuffer, dwRecvLength);
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} else {
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rv = reader_status; /* warning: not meaningful */
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send_msg(VSC_Error, mhHeader.reader_id, &rv, sizeof(uint32_t));
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}
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vreader_free(reader);
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reader = NULL; /* we've freed it, don't use it by accident
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again */
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break;
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case VSC_Flush:
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/* TODO: actually flush */
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send_msg(VSC_FlushComplete, mhHeader.reader_id, NULL, 0);
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break;
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case VSC_Error:
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error_msg = (VSCMsgError *) pbSendBuffer;
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if (error_msg->code == VSC_SUCCESS) {
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g_mutex_lock(&pending_reader_lock);
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if (pending_reader) {
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vreader_set_id(pending_reader, mhHeader.reader_id);
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vreader_free(pending_reader);
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pending_reader = NULL;
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g_cond_signal(&pending_reader_condition);
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}
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g_mutex_unlock(&pending_reader_lock);
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break;
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}
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printf("warning: qemu refused to add reader\n");
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if (error_msg->code == VSC_CANNOT_ADD_MORE_READERS) {
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/* clear pending reader, qemu can't handle any more */
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g_mutex_lock(&pending_reader_lock);
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if (pending_reader) {
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pending_reader = NULL;
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/* make sure the event loop doesn't hang */
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g_cond_signal(&pending_reader_condition);
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}
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g_mutex_unlock(&pending_reader_lock);
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}
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break;
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case VSC_Init:
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if (on_host_init(&mhHeader, (VSCMsgInit *)pbSendBuffer) < 0) {
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return FALSE;
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}
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break;
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default:
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g_assert_not_reached();
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return FALSE;
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}
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state = STATE_HEADER;
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}
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return TRUE;
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}
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static gboolean
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do_socket(GIOChannel *source,
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GIOCondition condition,
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gpointer data)
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{
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/* not sure if two watches work well with a single win32 sources */
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if (condition & G_IO_OUT) {
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if (!do_socket_send(source, condition, data)) {
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return FALSE;
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}
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}
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if (condition & G_IO_IN) {
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if (!do_socket_read(source, condition, data)) {
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return FALSE;
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}
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}
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return TRUE;
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}
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static void
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update_socket_watch(void)
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{
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gboolean out = socket_to_send->len > 0;
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if (socket_tag != 0) {
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g_source_remove(socket_tag);
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}
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socket_tag = g_io_add_watch(channel_socket,
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G_IO_IN | (out ? G_IO_OUT : 0), do_socket, NULL);
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}
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static gboolean
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do_command(GIOChannel *source,
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GIOCondition condition,
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gpointer data)
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{
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char *string;
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VCardEmulError error;
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static unsigned int default_reader_id;
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unsigned int reader_id;
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VReader *reader = NULL;
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GError *err = NULL;
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g_assert(condition & G_IO_IN);
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reader_id = default_reader_id;
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g_io_channel_read_line(source, &string, NULL, NULL, &err);
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if (err != NULL) {
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g_error("Error while reading command: %s", err->message);
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}
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if (string != NULL) {
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if (strncmp(string, "exit", 4) == 0) {
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/* remove all the readers */
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VReaderList *list = vreader_get_reader_list();
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VReaderListEntry *reader_entry;
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printf("Active Readers:\n");
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for (reader_entry = vreader_list_get_first(list); reader_entry;
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reader_entry = vreader_list_get_next(reader_entry)) {
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VReader *reader = vreader_list_get_reader(reader_entry);
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vreader_id_t reader_id;
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reader_id = vreader_get_id(reader);
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if (reader_id == -1) {
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continue;
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}
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/* be nice and signal card removal first (qemu probably should
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* do this itself) */
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if (vreader_card_is_present(reader) == VREADER_OK) {
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send_msg(VSC_CardRemove, reader_id, NULL, 0);
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}
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send_msg(VSC_ReaderRemove, reader_id, NULL, 0);
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}
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exit(0);
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} else if (strncmp(string, "insert", 6) == 0) {
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if (string[6] == ' ') {
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reader_id = get_id_from_string(&string[7], reader_id);
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}
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reader = vreader_get_reader_by_id(reader_id);
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if (reader != NULL) {
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error = vcard_emul_force_card_insert(reader);
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printf("insert %s, returned %d\n",
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vreader_get_name(reader), error);
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} else {
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printf("no reader by id %u found\n", reader_id);
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}
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} else if (strncmp(string, "remove", 6) == 0) {
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if (string[6] == ' ') {
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reader_id = get_id_from_string(&string[7], reader_id);
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}
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reader = vreader_get_reader_by_id(reader_id);
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if (reader != NULL) {
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error = vcard_emul_force_card_remove(reader);
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printf("remove %s, returned %d\n",
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vreader_get_name(reader), error);
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} else {
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printf("no reader by id %u found\n", reader_id);
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}
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} else if (strncmp(string, "select", 6) == 0) {
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if (string[6] == ' ') {
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reader_id = get_id_from_string(&string[7],
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VSCARD_UNDEFINED_READER_ID);
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}
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if (reader_id != VSCARD_UNDEFINED_READER_ID) {
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reader = vreader_get_reader_by_id(reader_id);
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|
}
|
|
if (reader) {
|
|
printf("Selecting reader %u, %s\n", reader_id,
|
|
vreader_get_name(reader));
|
|
default_reader_id = reader_id;
|
|
} else {
|
|
printf("Reader with id %u not found\n", reader_id);
|
|
}
|
|
} else if (strncmp(string, "debug", 5) == 0) {
|
|
if (string[5] == ' ') {
|
|
verbose = get_id_from_string(&string[6], 0);
|
|
}
|
|
printf("debug level = %d\n", verbose);
|
|
} else if (strncmp(string, "list", 4) == 0) {
|
|
VReaderList *list = vreader_get_reader_list();
|
|
VReaderListEntry *reader_entry;
|
|
printf("Active Readers:\n");
|
|
for (reader_entry = vreader_list_get_first(list); reader_entry;
|
|
reader_entry = vreader_list_get_next(reader_entry)) {
|
|
VReader *reader = vreader_list_get_reader(reader_entry);
|
|
vreader_id_t reader_id;
|
|
reader_id = vreader_get_id(reader);
|
|
if (reader_id == -1) {
|
|
continue;
|
|
}
|
|
printf("%3u %s %s\n", reader_id,
|
|
vreader_card_is_present(reader) == VREADER_OK ?
|
|
"CARD_PRESENT" : " ",
|
|
vreader_get_name(reader));
|
|
}
|
|
printf("Inactive Readers:\n");
|
|
for (reader_entry = vreader_list_get_first(list); reader_entry;
|
|
reader_entry = vreader_list_get_next(reader_entry)) {
|
|
VReader *reader = vreader_list_get_reader(reader_entry);
|
|
vreader_id_t reader_id;
|
|
reader_id = vreader_get_id(reader);
|
|
if (reader_id != -1) {
|
|
continue;
|
|
}
|
|
|
|
printf("INA %s %s\n",
|
|
vreader_card_is_present(reader) == VREADER_OK ?
|
|
"CARD_PRESENT" : " ",
|
|
vreader_get_name(reader));
|
|
}
|
|
vreader_list_delete(list);
|
|
} else if (*string != 0) {
|
|
printf("valid commands:\n");
|
|
printf("insert [reader_id]\n");
|
|
printf("remove [reader_id]\n");
|
|
printf("select reader_id\n");
|
|
printf("list\n");
|
|
printf("debug [level]\n");
|
|
printf("exit\n");
|
|
}
|
|
}
|
|
vreader_free(reader);
|
|
printf("> ");
|
|
fflush(stdout);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/* just for ease of parsing command line arguments. */
|
|
#define MAX_CERTS 100
|
|
|
|
static int
|
|
connect_to_qemu(
|
|
const char *host,
|
|
const char *port
|
|
) {
|
|
struct addrinfo hints;
|
|
struct addrinfo *server;
|
|
int ret, sock;
|
|
|
|
sock = socket(AF_INET, SOCK_STREAM, 0);
|
|
if (sock < 0) {
|
|
/* Error */
|
|
fprintf(stderr, "Error opening socket!\n");
|
|
return -1;
|
|
}
|
|
|
|
memset(&hints, 0, sizeof(struct addrinfo));
|
|
hints.ai_family = AF_UNSPEC;
|
|
hints.ai_socktype = SOCK_STREAM;
|
|
hints.ai_flags = 0;
|
|
hints.ai_protocol = 0; /* Any protocol */
|
|
|
|
ret = getaddrinfo(host, port, &hints, &server);
|
|
|
|
if (ret != 0) {
|
|
/* Error */
|
|
fprintf(stderr, "getaddrinfo failed\n");
|
|
goto cleanup_socket;
|
|
}
|
|
|
|
if (connect(sock, server->ai_addr, server->ai_addrlen) < 0) {
|
|
/* Error */
|
|
fprintf(stderr, "Could not connect\n");
|
|
goto cleanup_socket;
|
|
}
|
|
if (verbose) {
|
|
printf("Connected (sizeof Header=%zd)!\n", sizeof(VSCMsgHeader));
|
|
}
|
|
return sock;
|
|
|
|
cleanup_socket:
|
|
closesocket(sock);
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
main(
|
|
int argc,
|
|
char *argv[]
|
|
) {
|
|
GMainLoop *loop;
|
|
GIOChannel *channel_stdin;
|
|
char *qemu_host;
|
|
char *qemu_port;
|
|
|
|
VCardEmulOptions *command_line_options = NULL;
|
|
|
|
char *cert_names[MAX_CERTS];
|
|
char *emul_args = NULL;
|
|
int cert_count = 0;
|
|
int c, sock;
|
|
|
|
#ifdef _WIN32
|
|
WSADATA Data;
|
|
|
|
if (WSAStartup(MAKEWORD(2, 2), &Data) != 0) {
|
|
c = WSAGetLastError();
|
|
fprintf(stderr, "WSAStartup: %d\n", c);
|
|
return 1;
|
|
}
|
|
#endif
|
|
#if !GLIB_CHECK_VERSION(2, 31, 0)
|
|
if (!g_thread_supported()) {
|
|
g_thread_init(NULL);
|
|
}
|
|
#endif
|
|
|
|
while ((c = getopt(argc, argv, "c:e:pd:")) != -1) {
|
|
switch (c) {
|
|
case 'c':
|
|
if (cert_count >= MAX_CERTS) {
|
|
printf("too many certificates (max = %d)\n", MAX_CERTS);
|
|
exit(5);
|
|
}
|
|
cert_names[cert_count++] = optarg;
|
|
break;
|
|
case 'e':
|
|
emul_args = optarg;
|
|
break;
|
|
case 'p':
|
|
print_usage();
|
|
exit(4);
|
|
break;
|
|
case 'd':
|
|
verbose = get_id_from_string(optarg, 1);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (argc - optind != 2) {
|
|
print_usage();
|
|
exit(4);
|
|
}
|
|
|
|
if (cert_count > 0) {
|
|
char *new_args;
|
|
int len, i;
|
|
/* if we've given some -c options, we clearly we want do so some
|
|
* software emulation. add that emulation now. this is NSS Emulator
|
|
* specific */
|
|
if (emul_args == NULL) {
|
|
emul_args = (char *)"db=\"/etc/pki/nssdb\"";
|
|
}
|
|
#define SOFT_STRING ",soft=(,Virtual Reader,CAC,,"
|
|
/* 2 == close paren & null */
|
|
len = strlen(emul_args) + strlen(SOFT_STRING) + 2;
|
|
for (i = 0; i < cert_count; i++) {
|
|
len += strlen(cert_names[i])+1; /* 1 == comma */
|
|
}
|
|
new_args = g_malloc(len);
|
|
strcpy(new_args, emul_args);
|
|
strcat(new_args, SOFT_STRING);
|
|
for (i = 0; i < cert_count; i++) {
|
|
strcat(new_args, cert_names[i]);
|
|
strcat(new_args, ",");
|
|
}
|
|
strcat(new_args, ")");
|
|
emul_args = new_args;
|
|
}
|
|
if (emul_args) {
|
|
command_line_options = vcard_emul_options(emul_args);
|
|
}
|
|
|
|
qemu_host = g_strdup(argv[argc - 2]);
|
|
qemu_port = g_strdup(argv[argc - 1]);
|
|
sock = connect_to_qemu(qemu_host, qemu_port);
|
|
if (sock == -1) {
|
|
fprintf(stderr, "error opening socket, exiting.\n");
|
|
exit(5);
|
|
}
|
|
|
|
socket_to_send = g_byte_array_new();
|
|
vcard_emul_init(command_line_options);
|
|
loop = g_main_loop_new(NULL, TRUE);
|
|
|
|
printf("> ");
|
|
fflush(stdout);
|
|
|
|
#ifdef _WIN32
|
|
channel_stdin = g_io_channel_win32_new_fd(STDIN_FILENO);
|
|
#else
|
|
channel_stdin = g_io_channel_unix_new(STDIN_FILENO);
|
|
#endif
|
|
g_io_add_watch(channel_stdin, G_IO_IN, do_command, NULL);
|
|
#ifdef _WIN32
|
|
channel_socket = g_io_channel_win32_new_socket(sock);
|
|
#else
|
|
channel_socket = g_io_channel_unix_new(sock);
|
|
#endif
|
|
g_io_channel_set_encoding(channel_socket, NULL, NULL);
|
|
/* we buffer ourself for thread safety reasons */
|
|
g_io_channel_set_buffered(channel_socket, FALSE);
|
|
|
|
/* Send init message, Host responds (and then we send reader attachments) */
|
|
VSCMsgInit init = {
|
|
.version = htonl(VSCARD_VERSION),
|
|
.magic = VSCARD_MAGIC,
|
|
.capabilities = {0}
|
|
};
|
|
send_msg(VSC_Init, 0, &init, sizeof(init));
|
|
|
|
g_main_loop_run(loop);
|
|
g_main_loop_unref(loop);
|
|
|
|
g_io_channel_unref(channel_stdin);
|
|
g_io_channel_unref(channel_socket);
|
|
g_byte_array_free(socket_to_send, TRUE);
|
|
|
|
closesocket(sock);
|
|
return 0;
|
|
}
|