aboutsummaryrefslogtreecommitdiff
path: root/libcacard
diff options
context:
space:
mode:
authorMarc-André Lureau <mlureau@redhat.com>2013-02-25 23:31:16 +0100
committerAlon Levy <alevy@redhat.com>2013-04-24 11:47:44 +0300
commitc9495ee9eb57786f5a60d4591bb186b23f6b6bef (patch)
tree1e83e235fab6ebf094f0bbbfaf362e72b6e6857a /libcacard
parent930c8ad472ec00d40cfbf1e9b1395946bf0dd392 (diff)
downloadqemu-arm-c9495ee9eb57786f5a60d4591bb186b23f6b6bef.tar.gz
libcacard: teach vscclient to use GMainLoop for portability
This version handles non-blocking sending and receiving from the socket. Signed-off-by: Marc-André Lureau <mlureau@redhat.com> Reviewed-by: Alon Levy <alevy@redhat.com>
Diffstat (limited to 'libcacard')
-rw-r--r--libcacard/vscclient.c391
1 files changed, 246 insertions, 145 deletions
diff --git a/libcacard/vscclient.c b/libcacard/vscclient.c
index 5f476348b9..ac23647236 100644
--- a/libcacard/vscclient.c
+++ b/libcacard/vscclient.c
@@ -10,7 +10,10 @@
* See the COPYING.LIB file in the top-level directory.
*/
+#ifndef _WIN32
#include <netdb.h>
+#endif
+#include <glib.h>
#include "qemu-common.h"
#include "qemu/thread.h"
@@ -22,9 +25,7 @@
#include "vcard_emul.h"
#include "vevent.h"
-int verbose;
-
-int sock;
+static int verbose;
static void
print_byte_array(
@@ -51,7 +52,47 @@ print_usage(void) {
vcard_emul_usage();
}
-static QemuMutex write_lock;
+static GIOChannel *channel_socket;
+static GByteArray *socket_to_send;
+static QemuMutex socket_to_send_lock;
+static guint socket_tag;
+
+static void
+update_socket_watch(gboolean out);
+
+static gboolean
+do_socket_send(GIOChannel *source,
+ GIOCondition condition,
+ gpointer data)
+{
+ gsize bw;
+ GError *err = NULL;
+
+ g_return_val_if_fail(socket_to_send->len != 0, FALSE);
+ g_return_val_if_fail(condition & G_IO_OUT, FALSE);
+
+ g_io_channel_write_chars(channel_socket,
+ (gchar *)socket_to_send->data, socket_to_send->len, &bw, &err);
+ if (err != NULL) {
+ g_error("Error while sending socket %s", err->message);
+ return FALSE;
+ }
+ g_byte_array_remove_range(socket_to_send, 0, bw);
+
+ if (socket_to_send->len == 0) {
+ update_socket_watch(FALSE);
+ return FALSE;
+ }
+ return TRUE;
+}
+
+static gboolean
+socket_prepare_sending(gpointer user_data)
+{
+ update_socket_watch(TRUE);
+
+ return FALSE;
+}
static int
send_msg(
@@ -60,10 +101,9 @@ send_msg(
const void *msg,
unsigned int length
) {
- int rv;
VSCMsgHeader mhHeader;
- qemu_mutex_lock(&write_lock);
+ qemu_mutex_lock(&socket_to_send_lock);
if (verbose > 10) {
printf("sending type=%d id=%u, len =%u (0x%x)\n",
@@ -73,23 +113,11 @@ send_msg(
mhHeader.type = htonl(type);
mhHeader.reader_id = 0;
mhHeader.length = htonl(length);
- rv = write(sock, &mhHeader, sizeof(mhHeader));
- if (rv < 0) {
- /* Error */
- fprintf(stderr, "write header error\n");
- close(sock);
- qemu_mutex_unlock(&write_lock);
- return 16;
- }
- rv = write(sock, msg, length);
- if (rv < 0) {
- /* Error */
- fprintf(stderr, "write error\n");
- close(sock);
- qemu_mutex_unlock(&write_lock);
- return 16;
- }
- qemu_mutex_unlock(&write_lock);
+ g_byte_array_append(socket_to_send, (guint8 *)&mhHeader, sizeof(mhHeader));
+ g_byte_array_append(socket_to_send, (guint8 *)msg, length);
+ g_idle_add(socket_prepare_sending, NULL);
+
+ qemu_mutex_unlock(&socket_to_send_lock);
return 0;
}
@@ -245,139 +273,203 @@ on_host_init(VSCMsgHeader *mhHeader, VSCMsgInit *incoming)
return 0;
}
+
+enum {
+ STATE_HEADER,
+ STATE_MESSAGE,
+};
+
#define APDUBufSize 270
-static int
-do_socket_read(void)
+static gboolean
+do_socket_read(GIOChannel *source,
+ GIOCondition condition,
+ gpointer data)
{
int rv;
int dwSendLength;
int dwRecvLength;
uint8_t pbRecvBuffer[APDUBufSize];
- uint8_t pbSendBuffer[APDUBufSize];
+ static uint8_t pbSendBuffer[APDUBufSize];
VReaderStatus reader_status;
VReader *reader = NULL;
- VSCMsgHeader mhHeader;
+ static VSCMsgHeader mhHeader;
VSCMsgError *error_msg;
+ GError *err = NULL;
- rv = read(sock, &mhHeader, sizeof(mhHeader));
- if (rv < sizeof(mhHeader)) {
- /* Error */
- if (rv < 0) {
- perror("header read error\n");
- } else {
- fprintf(stderr, "header short read %d\n", rv);
- }
- return -1;
- }
- mhHeader.type = ntohl(mhHeader.type);
- mhHeader.reader_id = ntohl(mhHeader.reader_id);
- mhHeader.length = ntohl(mhHeader.length);
- if (verbose) {
- printf("Header: type=%d, reader_id=%u length=%d (0x%x)\n",
- mhHeader.type, mhHeader.reader_id, mhHeader.length,
- mhHeader.length);
- }
- switch (mhHeader.type) {
- case VSC_APDU:
- case VSC_Flush:
- case VSC_Error:
- case VSC_Init:
- rv = read(sock, pbSendBuffer, mhHeader.length);
- break;
- default:
- fprintf(stderr, "Unexpected message of type 0x%X\n", mhHeader.type);
- return -1;
+ static gchar *buf;
+ static gsize br, to_read;
+ static int state = STATE_HEADER;
+
+ if (state == STATE_HEADER && to_read == 0) {
+ buf = (gchar *)&mhHeader;
+ to_read = sizeof(mhHeader);
}
- switch (mhHeader.type) {
- case VSC_APDU:
- if (rv < 0) {
- /* Error */
- fprintf(stderr, "read error\n");
- close(sock);
- return -1;
+
+ if (to_read > 0) {
+ g_io_channel_read_chars(source, (gchar *)buf, to_read, &br, &err);
+ if (err != NULL) {
+ g_error("error while reading: %s", err->message);
}
+ buf += br;
+ to_read -= br;
+ if (to_read != 0) {
+ return TRUE;
+ }
+ }
+
+ if (state == STATE_HEADER) {
+ mhHeader.type = ntohl(mhHeader.type);
+ mhHeader.reader_id = ntohl(mhHeader.reader_id);
+ mhHeader.length = ntohl(mhHeader.length);
if (verbose) {
- printf(" recv APDU: ");
- print_byte_array(pbSendBuffer, mhHeader.length);
+ printf("Header: type=%d, reader_id=%u length=%d (0x%x)\n",
+ mhHeader.type, mhHeader.reader_id, mhHeader.length,
+ mhHeader.length);
}
- /* Transmit received APDU */
- dwSendLength = mhHeader.length;
- dwRecvLength = sizeof(pbRecvBuffer);
- reader = vreader_get_reader_by_id(mhHeader.reader_id);
- reader_status = vreader_xfr_bytes(reader,
- pbSendBuffer, dwSendLength,
- pbRecvBuffer, &dwRecvLength);
- if (reader_status == VREADER_OK) {
- mhHeader.length = dwRecvLength;
+ switch (mhHeader.type) {
+ case VSC_APDU:
+ case VSC_Flush:
+ case VSC_Error:
+ case VSC_Init:
+ buf = (gchar *)pbSendBuffer;
+ to_read = mhHeader.length;
+ state = STATE_MESSAGE;
+ return TRUE;
+ default:
+ fprintf(stderr, "Unexpected message of type 0x%X\n", mhHeader.type);
+ return FALSE;
+ }
+ }
+
+ if (state == STATE_MESSAGE) {
+ switch (mhHeader.type) {
+ case VSC_APDU:
if (verbose) {
- printf(" send response: ");
- print_byte_array(pbRecvBuffer, mhHeader.length);
+ printf(" recv APDU: ");
+ print_byte_array(pbSendBuffer, mhHeader.length);
}
- send_msg(VSC_APDU, mhHeader.reader_id,
- pbRecvBuffer, dwRecvLength);
- } else {
- rv = reader_status; /* warning: not meaningful */
- send_msg(VSC_Error, mhHeader.reader_id, &rv, sizeof(uint32_t));
- }
- vreader_free(reader);
- reader = NULL; /* we've freed it, don't use it by accident
- again */
- break;
- case VSC_Flush:
- /* TODO: actually flush */
- send_msg(VSC_FlushComplete, mhHeader.reader_id, NULL, 0);
- break;
- case VSC_Error:
- error_msg = (VSCMsgError *) pbSendBuffer;
- if (error_msg->code == VSC_SUCCESS) {
- qemu_mutex_lock(&pending_reader_lock);
- if (pending_reader) {
- vreader_set_id(pending_reader, mhHeader.reader_id);
- vreader_free(pending_reader);
- pending_reader = NULL;
- qemu_cond_signal(&pending_reader_condition);
+ /* Transmit received APDU */
+ dwSendLength = mhHeader.length;
+ dwRecvLength = sizeof(pbRecvBuffer);
+ reader = vreader_get_reader_by_id(mhHeader.reader_id);
+ reader_status = vreader_xfr_bytes(reader,
+ pbSendBuffer, dwSendLength,
+ pbRecvBuffer, &dwRecvLength);
+ if (reader_status == VREADER_OK) {
+ mhHeader.length = dwRecvLength;
+ if (verbose) {
+ printf(" send response: ");
+ print_byte_array(pbRecvBuffer, mhHeader.length);
+ }
+ send_msg(VSC_APDU, mhHeader.reader_id,
+ pbRecvBuffer, dwRecvLength);
+ } else {
+ rv = reader_status; /* warning: not meaningful */
+ send_msg(VSC_Error, mhHeader.reader_id, &rv, sizeof(uint32_t));
}
- qemu_mutex_unlock(&pending_reader_lock);
+ vreader_free(reader);
+ reader = NULL; /* we've freed it, don't use it by accident
+ again */
break;
- }
- printf("warning: qemu refused to add reader\n");
- if (error_msg->code == VSC_CANNOT_ADD_MORE_READERS) {
- /* clear pending reader, qemu can't handle any more */
- qemu_mutex_lock(&pending_reader_lock);
- if (pending_reader) {
- pending_reader = NULL;
- /* make sure the event loop doesn't hang */
- qemu_cond_signal(&pending_reader_condition);
+ case VSC_Flush:
+ /* TODO: actually flush */
+ send_msg(VSC_FlushComplete, mhHeader.reader_id, NULL, 0);
+ break;
+ case VSC_Error:
+ error_msg = (VSCMsgError *) pbSendBuffer;
+ if (error_msg->code == VSC_SUCCESS) {
+ qemu_mutex_lock(&pending_reader_lock);
+ if (pending_reader) {
+ vreader_set_id(pending_reader, mhHeader.reader_id);
+ vreader_free(pending_reader);
+ pending_reader = NULL;
+ qemu_cond_signal(&pending_reader_condition);
+ }
+ qemu_mutex_unlock(&pending_reader_lock);
+ break;
}
- qemu_mutex_unlock(&pending_reader_lock);
+ printf("warning: qemu refused to add reader\n");
+ if (error_msg->code == VSC_CANNOT_ADD_MORE_READERS) {
+ /* clear pending reader, qemu can't handle any more */
+ qemu_mutex_lock(&pending_reader_lock);
+ if (pending_reader) {
+ pending_reader = NULL;
+ /* make sure the event loop doesn't hang */
+ qemu_cond_signal(&pending_reader_condition);
+ }
+ qemu_mutex_unlock(&pending_reader_lock);
+ }
+ break;
+ case VSC_Init:
+ if (on_host_init(&mhHeader, (VSCMsgInit *)pbSendBuffer) < 0) {
+ return FALSE;
+ }
+ break;
+ default:
+ g_warn_if_reached();
+ return FALSE;
}
- break;
- case VSC_Init:
- if (on_host_init(&mhHeader, (VSCMsgInit *)pbSendBuffer) < 0) {
- return -1;
+
+ state = STATE_HEADER;
+ }
+
+
+ return TRUE;
+}
+
+static gboolean
+do_socket(GIOChannel *source,
+ GIOCondition condition,
+ gpointer data)
+{
+ /* not sure if two watches work well with a single win32 sources */
+ if (condition & G_IO_OUT) {
+ if (!do_socket_send(source, condition, data)) {
+ return FALSE;
}
- break;
- default:
- printf("Default\n");
- return -1;
}
- return 0;
+ if (condition & G_IO_IN) {
+ if (!do_socket_read(source, condition, data)) {
+ return FALSE;
+ }
+ }
+
+ return TRUE;
}
static void
-do_command(void)
+update_socket_watch(gboolean out)
+{
+ if (socket_tag != 0) {
+ g_source_remove(socket_tag);
+ }
+
+ socket_tag = g_io_add_watch(channel_socket,
+ G_IO_IN | (out ? G_IO_OUT : 0), do_socket, NULL);
+}
+
+static gboolean
+do_command(GIOChannel *source,
+ GIOCondition condition,
+ gpointer data)
{
- char inbuf[255];
char *string;
VCardEmulError error;
static unsigned int default_reader_id;
unsigned int reader_id;
VReader *reader = NULL;
+ GError *err = NULL;
+
+ g_assert(condition & G_IO_IN);
reader_id = default_reader_id;
- string = fgets(inbuf, sizeof(inbuf), stdin);
+ g_io_channel_read_line(source, &string, NULL, NULL, &err);
+ if (err != NULL) {
+ g_error("Error while reading command: %s", err->message);
+ }
+
if (string != NULL) {
if (strncmp(string, "exit", 4) == 0) {
/* remove all the readers */
@@ -491,6 +583,8 @@ do_command(void)
vreader_free(reader);
printf("> ");
fflush(stdout);
+
+ return TRUE;
}
@@ -504,7 +598,7 @@ connect_to_qemu(
) {
struct addrinfo hints;
struct addrinfo *server;
- int ret;
+ int ret, sock;
sock = qemu_socket(AF_INET, SOCK_STREAM, 0);
if (sock < 0) {
@@ -543,6 +637,8 @@ main(
int argc,
char *argv[]
) {
+ GMainLoop *loop;
+ GIOChannel *channel_stdin;
char *qemu_host;
char *qemu_port;
VSCMsgHeader mhHeader;
@@ -552,7 +648,10 @@ main(
char *cert_names[MAX_CERTS];
char *emul_args = NULL;
int cert_count = 0;
- int c, rv;
+ int c, sock;
+
+ if (socket_init() != 0)
+ return 1;
while ((c = getopt(argc, argv, "c:e:pd:")) != -1) {
switch (c) {
@@ -618,15 +717,33 @@ main(
exit(5);
}
- qemu_mutex_init(&write_lock);
+ socket_to_send = g_byte_array_new();
+ qemu_mutex_init(&socket_to_send_lock);
qemu_mutex_init(&pending_reader_lock);
qemu_cond_init(&pending_reader_condition);
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),
@@ -635,28 +752,12 @@ main(
};
send_msg(VSC_Init, mhHeader.reader_id, &init, sizeof(init));
- do {
- fd_set fds;
-
- FD_ZERO(&fds);
- FD_SET(1, &fds);
- FD_SET(sock, &fds);
+ g_main_loop_run(loop);
+ g_main_loop_unref(loop);
- /* waiting on input from the socket */
- rv = select(sock+1, &fds, NULL, NULL, NULL);
- if (rv < 0) {
- /* handle error */
- perror("select");
- return 7;
- }
- if (FD_ISSET(1, &fds)) {
- do_command();
- }
- if (!FD_ISSET(sock, &fds)) {
- continue;
- }
- rv = do_socket_read();
- } while (rv >= 0);
+ g_io_channel_unref(channel_stdin);
+ g_io_channel_unref(channel_socket);
+ g_byte_array_unref(socket_to_send);
return 0;
}