libwmc: add more test code and start of com tests

6 files changed, 288 insertions, 22 deletions

diff --git a/libwmc/src/Makefile.am b/libwmc/src/Makefile.am
index fe0a9fbc..1a376e36 100644
--- a/libwmc/src/Makefile.am
+++ b/libwmc/src/Makefile.am
@@ -1,28 +1,17 @@
-noinst_LTLIBRARIES = libwmc.la libwmc-test.la
+noinst_LTLIBRARIES = libwmc.la
 
 
 libwmc_la_CPPFLAGS = \
 	$(MM_CFLAGS)
 
 libwmc_la_SOURCES = \
+	errors.c \
+	errors.h \
 	utils.c \
-	utils.h
+	utils.h \
+	com.c \
+	com.h
 
 libwmc_la_LIBADD = \
 	$(MM_LIBS)
 
-
-###########################################
-# Test library without symbol versioning
-###########################################
-
-libwmc_test_la_CPPFLAGS = \
-	$(MM_CFLAGS)
-
-libwmc_test_la_SOURCES = \
-	utils.c \
-	utils.h
-
-libwmc_test_la_LIBADD = \
-	$(MM_LIBS)
-
diff --git a/libwmc/src/com.c b/libwmc/src/com.c
new file mode 100644
index 00000000..751dd4a7
--- /dev/null
+++ b/libwmc/src/com.c
@@ -0,0 +1,57 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * Copyright (C) 2011 Red Hat, Inc.
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <errno.h>
+#include <termios.h>
+#include <fcntl.h>
+#include <string.h>
+
+#include "com.h"
+#include "errors.h"
+
+wbool
+wmc_port_setup (int fd, WmcError **error)
+{
+    struct termios stbuf;
+
+    errno = 0;
+    memset (&stbuf, 0, sizeof (stbuf));
+    if (tcgetattr (fd, &stbuf) != 0) {
+        wmc_error_set (error, WMC_SERIAL_ERROR, WMC_SERIAL_ERROR_CONFIG_FAILED,
+                       "tcgetattr() error: %d", errno);
+    }
+
+    stbuf.c_cflag &= ~(CBAUD | CSIZE | CSTOPB | CLOCAL | PARENB);
+    stbuf.c_iflag &= ~(HUPCL | IUTF8 | IUCLC | ISTRIP | IXON | IXOFF | IXANY | ICRNL);
+    stbuf.c_oflag &= ~(OPOST | OCRNL | ONLCR | OLCUC | ONLRET);
+    stbuf.c_lflag &= ~(ICANON | ISIG | IEXTEN | ECHO | ECHOE | ECHOK | ECHONL);
+    stbuf.c_lflag &= ~(NOFLSH | XCASE | TOSTOP | ECHOPRT | ECHOCTL | ECHOKE);
+    stbuf.c_cc[VMIN] = 1;
+    stbuf.c_cc[VTIME] = 0;
+    stbuf.c_cc[VEOF] = 1;
+    stbuf.c_cflag |= (B115200 | CS8 | CREAD | 0 | 0);  /* No parity, 1 stop bit */
+
+    errno = 0;
+    if (tcsetattr (fd, TCSANOW, &stbuf) < 0) {
+        wmc_error_set (error, WMC_SERIAL_ERROR, WMC_SERIAL_ERROR_CONFIG_FAILED,
+                       "tcsetattr() error: %d", errno);
+        return FALSE;
+    }
+
+    return TRUE;
+}
+
diff --git a/libwmc/src/com.h b/libwmc/src/com.h
new file mode 100644
index 00000000..ffcf5d54
--- /dev/null
+++ b/libwmc/src/com.h
@@ -0,0 +1,33 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * Copyright (C) 2011 Red Hat, Inc.
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef LIBWMC_COM_H
+#define LIBWMC_COM_H
+
+#include "errors.h"
+
+enum {
+    WMC_SERIAL_ERROR = 1000
+};
+
+enum {
+    WMC_SERIAL_ERROR_CONFIG_FAILED = 1
+};
+
+wbool wmc_port_setup (int fd, WmcError **error);
+
+#endif  /* LIBWMC_COM_H */
diff --git a/libwmc/src/errors.c b/libwmc/src/errors.c
new file mode 100644
index 00000000..a1d87ba1
--- /dev/null
+++ b/libwmc/src/errors.c
@@ -0,0 +1,109 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * Copyright (C) 2011 Red Hat, Inc.
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "errors.h"
+#include <stdlib.h>
+#include <string.h>
+
+WmcError *
+wmc_error_new (u_int32_t domain,
+               u_int32_t code,
+               const char *format,
+               ...)
+{
+    WmcError *error;
+    va_list args;
+    int n;
+
+    wmc_return_val_if_fail (format != NULL, NULL);
+    wmc_return_val_if_fail (format[0] != '\0', NULL);
+
+    error = malloc (sizeof (WmcError));
+    wmc_assert (error != NULL);
+
+    error->domain = domain;
+    error->code = code;
+
+    va_start (args, format);
+    n = vasprintf (&error->message, format, args);
+    va_end (args);
+
+    if (n < 0) {
+        free (error);
+        return NULL;
+    }
+
+    return error;
+}
+
+void
+wmc_error_set (WmcError **error,
+               u_int32_t domain,
+               u_int32_t code,
+               const char *format,
+               ...)
+{
+    va_list args;
+    int n;
+
+    if (error == NULL)
+        return;
+    wmc_return_if_fail (*error == NULL);
+    wmc_return_if_fail (format[0] != '\0');
+
+    *error = malloc (sizeof (WmcError));
+    wmc_assert (*error != NULL);
+
+    (*error)->domain = domain;
+    (*error)->code = code;
+
+    va_start (args, format);
+    n = vasprintf (&(*error)->message, format, args);
+    va_end (args);
+
+    if (n < 0) {
+        free (*error);
+        *error = NULL;
+    }
+}
+
+static void
+free_error (WmcError *error)
+{
+    if (error) {
+        if (error->message)
+            free (error->message);
+        memset (error, 0, sizeof (*error));
+        free (error);
+    }
+}
+
+void
+wmc_clear_error (WmcError **error)
+{
+    if (error) {
+        free_error (*error);
+        *error = NULL;
+    }
+}
+
+void
+wmc_free_error (WmcError *error)
+{
+    free_error (error);
+}
+
diff --git a/libwmc/src/errors.h b/libwmc/src/errors.h
new file mode 100644
index 00000000..aebe40f2
--- /dev/null
+++ b/libwmc/src/errors.h
@@ -0,0 +1,74 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * Copyright (C) 2011 Red Hat, Inc.
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef LIBWMC_ERRORS_H
+#define LIBWMC_ERRORS_H
+
+#include <config.h>
+#include <sys/types.h>
+#include <assert.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <stdio.h>
+
+typedef u_int8_t wbool;
+#ifndef TRUE
+#define TRUE (u_int8_t) 1
+#endif
+#ifndef FALSE
+#define FALSE (u_int8_t) 0
+#endif
+
+typedef struct {
+    u_int32_t domain;
+    u_int32_t code;
+    char *message;
+} WmcError;
+
+WmcError *wmc_error_new (u_int32_t domain,
+                         u_int32_t code,
+                         const char *format,
+                         ...) __attribute__((__format__ (__printf__, 3, 4)));
+
+void wmc_error_set (WmcError **error,
+                    u_int32_t domain,
+                    u_int32_t code,
+                    const char *format,
+                    ...) __attribute__((__format__ (__printf__, 4, 5)));
+
+void wmc_clear_error (WmcError **error);
+void wmc_free_error (WmcError *error);
+
+#define wmc_assert assert
+
+#define wmc_return_if_fail(e) \
+{ \
+    if (!(e)) { \
+        fprintf (stderr, "failed: ##e##\n"); \
+        return; \
+    } \
+}
+
+#define wmc_return_val_if_fail(e, v) \
+{ \
+    if (!(e)) { \
+        fprintf (stderr, "failed: ##e##\n"); \
+        return v; \
+    } \
+}
+
+#endif  /* LIBWMC_COM_H */
diff --git a/libwmc/src/utils.c b/libwmc/src/utils.c
index 99c13db7..3c470330 100644
--- a/libwmc/src/utils.c
+++ b/libwmc/src/utils.c
@@ -274,9 +274,11 @@ uml290_wmc_encapsulate (char *inbuf,
  * hdlc_decapsulate_buffer:
  * @inbuf: buffer in which to look for an HDLC frame
  * @inbuf_len: length of valid data in @inbuf
- * @check_known_crc: if %TRUE, validate the CRC using @known_crc
+ * @check_known_crc: if %TRUE, validate the CRC using @known_crc if the normal
+ *  CRC check fails
  * @known_crc: if @check_known_crc is %TRUE, compare the frame's CRC against
- *  @known_crc.  @known_crc must be in Little Endian (LE) byte order.
+ *  @known_crc if the normal CRC check fails.  @known_crc must be in Little
+ *  Endian (LE) byte order.
  * @outbuf: buffer in which to put decapsulated data from the HDLC frame
  * @outbuf_len: max size of @outbuf
  * @out_decap_len: on success, size of the decapsulated data
@@ -365,12 +367,14 @@ hdlc_decapsulate_buffer (const char *inbuf,
     }
 
     /* Check the CRC of the packet's data */
-    crc = check_known_crc ? known_crc : crc16 (outbuf, unesc_len - 2, 0);
+    crc = crc16 (outbuf, unesc_len - 2, 0);
     pkt_crc = outbuf[unesc_len - 2] & 0xFF;
     pkt_crc |= (outbuf[unesc_len - 1] & 0xFF) << 8;
     if (crc != pkt_crc) {
-        *out_used = pkt_len + 1; /* packet + CRC + 0x7E */
-        return FALSE;
+        if (!check_known_crc || (pkt_crc != known_crc)) {
+            *out_used = pkt_len + 1; /* packet + CRC + 0x7E */
+            return FALSE;
+        }
     }
 
     *out_used = pkt_len + 1; /* packet + CRC + 0x7E */