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-rw-r--r--libaltos/libaltos_linux.c528
1 files changed, 528 insertions, 0 deletions
diff --git a/libaltos/libaltos_linux.c b/libaltos/libaltos_linux.c
new file mode 100644
index 00000000..2065d74a
--- /dev/null
+++ b/libaltos/libaltos_linux.c
@@ -0,0 +1,528 @@
+/*
+ * Copyright © 2016 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * 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, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#define _GNU_SOURCE
+#include "libaltos_private.h"
+#include "libaltos_posix.h"
+
+#include <ctype.h>
+#include <dirent.h>
+#include <bluetooth/bluetooth.h>
+#include <bluetooth/hci.h>
+#include <bluetooth/hci_lib.h>
+#include <bluetooth/rfcomm.h>
+
+static char *
+cc_fullname (char *dir, char *file)
+{
+ char *new;
+ int dlen = strlen (dir);
+ int flen = strlen (file);
+ int slen = 0;
+
+ if (dir[dlen-1] != '/')
+ slen = 1;
+ new = malloc (dlen + slen + flen + 1);
+ if (!new)
+ return 0;
+ strcpy(new, dir);
+ if (slen)
+ strcat (new, "/");
+ strcat(new, file);
+ return new;
+}
+
+static char *
+cc_basename(char *file)
+{
+ char *b;
+
+ b = strrchr(file, '/');
+ if (!b)
+ return file;
+ return b + 1;
+}
+
+static char *
+load_string(char *dir, char *file)
+{
+ char *full = cc_fullname(dir, file);
+ char line[4096];
+ char *r;
+ FILE *f;
+ int rlen;
+
+ f = fopen(full, "r");
+ free(full);
+ if (!f)
+ return NULL;
+ r = fgets(line, sizeof (line), f);
+ fclose(f);
+ if (!r)
+ return NULL;
+ rlen = strlen(r);
+ if (r[rlen-1] == '\n')
+ r[rlen-1] = '\0';
+ return strdup(r);
+}
+
+static int
+load_hex(char *dir, char *file)
+{
+ char *line;
+ char *end;
+ long i;
+
+ line = load_string(dir, file);
+ if (!line)
+ return -1;
+ i = strtol(line, &end, 16);
+ free(line);
+ if (end == line)
+ return -1;
+ return i;
+}
+
+static int
+load_dec(char *dir, char *file)
+{
+ char *line;
+ char *end;
+ long i;
+
+ line = load_string(dir, file);
+ if (!line)
+ return -1;
+ i = strtol(line, &end, 10);
+ free(line);
+ if (end == line)
+ return -1;
+ return i;
+}
+
+static int
+dir_filter_tty_colon(const struct dirent *d)
+{
+ return strncmp(d->d_name, "tty:", 4) == 0;
+}
+
+static int
+dir_filter_tty(const struct dirent *d)
+{
+ return strncmp(d->d_name, "tty", 3) == 0;
+}
+
+struct altos_usbdev {
+ char *sys;
+ char *tty;
+ char *manufacturer;
+ char *product_name;
+ int serial; /* AltOS always uses simple integer serial numbers */
+ int idProduct;
+ int idVendor;
+};
+
+static char *
+usb_tty(char *sys)
+{
+ char *base;
+ int num_configs;
+ int config;
+ struct dirent **namelist;
+ int interface;
+ int num_interfaces;
+ char endpoint_base[20];
+ char *endpoint_full;
+ char *tty_dir;
+ int ntty;
+ char *tty;
+
+ base = cc_basename(sys);
+ num_configs = load_hex(sys, "bNumConfigurations");
+ num_interfaces = load_hex(sys, "bNumInterfaces");
+ for (config = 1; config <= num_configs; config++) {
+ for (interface = 0; interface < num_interfaces; interface++) {
+ sprintf(endpoint_base, "%s:%d.%d",
+ base, config, interface);
+ endpoint_full = cc_fullname(sys, endpoint_base);
+
+
+ /* Check for tty:ttyACMx style names
+ */
+ ntty = scandir(endpoint_full, &namelist,
+ dir_filter_tty_colon,
+ alphasort);
+ if (ntty > 0) {
+ free(endpoint_full);
+ tty = cc_fullname("/dev", namelist[0]->d_name + 4);
+ free(namelist);
+ return tty;
+ }
+
+ /* Check for tty/ttyACMx style names
+ */
+ tty_dir = cc_fullname(endpoint_full, "tty");
+ ntty = scandir(tty_dir, &namelist,
+ dir_filter_tty,
+ alphasort);
+ free (tty_dir);
+ if (ntty > 0) {
+ tty = cc_fullname("/dev", namelist[0]->d_name);
+ free(endpoint_full);
+ free(namelist);
+ return tty;
+ }
+
+ /* Check for ttyACMx style names
+ */
+ ntty = scandir(endpoint_full, &namelist,
+ dir_filter_tty,
+ alphasort);
+ free(endpoint_full);
+ if (ntty > 0) {
+ tty = cc_fullname("/dev", namelist[0]->d_name);
+ free(namelist);
+ return tty;
+ }
+
+ }
+ }
+ return NULL;
+}
+
+static struct altos_usbdev *
+usb_scan_device(char *sys)
+{
+ struct altos_usbdev *usbdev;
+ char *tty;
+
+ tty = usb_tty(sys);
+ if (!tty)
+ return NULL;
+ usbdev = calloc(1, sizeof (struct altos_usbdev));
+ if (!usbdev)
+ return NULL;
+ usbdev->sys = strdup(sys);
+ usbdev->manufacturer = load_string(sys, "manufacturer");
+ usbdev->product_name = load_string(sys, "product");
+ usbdev->serial = load_dec(sys, "serial");
+ usbdev->idProduct = load_hex(sys, "idProduct");
+ usbdev->idVendor = load_hex(sys, "idVendor");
+ usbdev->tty = tty;
+ return usbdev;
+}
+
+static void
+usbdev_free(struct altos_usbdev *usbdev)
+{
+ free(usbdev->sys);
+ free(usbdev->manufacturer);
+ free(usbdev->product_name);
+ /* this can get used as a return value */
+ if (usbdev->tty)
+ free(usbdev->tty);
+ free(usbdev);
+}
+
+#define USB_DEVICES "/sys/bus/usb/devices"
+
+static int
+dir_filter_dev(const struct dirent *d)
+{
+ const char *n = d->d_name;
+ char c;
+
+ while ((c = *n++)) {
+ if (isdigit(c))
+ continue;
+ if (c == '-')
+ continue;
+ if (c == '.' && n != d->d_name + 1)
+ continue;
+ return 0;
+ }
+ return 1;
+}
+
+struct altos_list {
+ struct altos_usbdev **dev;
+ int current;
+ int ndev;
+};
+
+struct altos_list *
+altos_list_start(void)
+{
+ int e;
+ struct dirent **ents;
+ char *dir;
+ struct altos_usbdev *dev;
+ struct altos_list *devs;
+ int n;
+
+ devs = calloc(1, sizeof (struct altos_list));
+ if (!devs)
+ return NULL;
+
+ n = scandir (USB_DEVICES, &ents,
+ dir_filter_dev,
+ alphasort);
+ if (!n)
+ return 0;
+ for (e = 0; e < n; e++) {
+ dir = cc_fullname(USB_DEVICES, ents[e]->d_name);
+ dev = usb_scan_device(dir);
+ if (!dev)
+ continue;
+ free(dir);
+ if (devs->dev)
+ devs->dev = realloc(devs->dev,
+ (devs->ndev + 1) * sizeof (struct usbdev *));
+ else
+ devs->dev = malloc (sizeof (struct usbdev *));
+ devs->dev[devs->ndev++] = dev;
+ }
+ free(ents);
+ devs->current = 0;
+ return devs;
+}
+
+PUBLIC struct altos_list *
+altos_ftdi_list_start(void)
+{
+ return altos_list_start();
+}
+
+int
+altos_list_next(struct altos_list *list, struct altos_device *device)
+{
+ struct altos_usbdev *dev;
+ if (list->current >= list->ndev) {
+ return 0;
+ }
+ dev = list->dev[list->current];
+ strcpy(device->name, dev->product_name);
+ device->vendor = dev->idVendor;
+ device->product = dev->idProduct;
+ strcpy(device->path, dev->tty);
+ device->serial = dev->serial;
+ list->current++;
+ return 1;
+}
+
+void
+altos_list_finish(struct altos_list *usbdevs)
+{
+ int i;
+
+ if (!usbdevs)
+ return;
+ for (i = 0; i < usbdevs->ndev; i++)
+ usbdev_free(usbdevs->dev[i]);
+ free(usbdevs);
+}
+
+#include <dlfcn.h>
+
+static void *libbt;
+static int bt_initialized;
+
+static int init_bt(void) {
+ if (!bt_initialized) {
+ bt_initialized = 1;
+ libbt = dlopen("libbluetooth.so.3", RTLD_LAZY);
+ if (!libbt)
+ printf("failed to find bluetooth library\n");
+ }
+ return libbt != NULL;
+}
+
+#define join(a,b) a ## b
+#define bt_func(name, ret, fail, formals, actuals) \
+ static ret join(altos_, name) formals { \
+ static ret (*name) formals; \
+ if (!init_bt()) return fail; \
+ name = dlsym(libbt, #name); \
+ if (!name) return fail; \
+ return name actuals; \
+ }
+
+bt_func(ba2str, int, -1, (const bdaddr_t *ba, char *str), (ba, str))
+#define ba2str altos_ba2str
+
+bt_func(str2ba, int, -1, (const char *str, bdaddr_t *ba), (str, ba))
+#define str2ba altos_str2ba
+
+bt_func(hci_read_remote_name, int, -1, (int sock, const bdaddr_t *ba, int len, char *name, int timeout), (sock, ba, len, name, timeout))
+#define hci_read_remote_name altos_hci_read_remote_name
+
+bt_func(hci_open_dev, int, -1, (int dev_id), (dev_id))
+#define hci_open_dev altos_hci_open_dev
+
+bt_func(hci_get_route, int, -1, (bdaddr_t *bdaddr), (bdaddr))
+#define hci_get_route altos_hci_get_route
+
+bt_func(hci_inquiry, int, -1, (int adapter_id, int len, int max_rsp, const uint8_t *lap, inquiry_info **devs, long flags), (adapter_id, len, max_rsp, lap, devs, flags))
+#define hci_inquiry altos_hci_inquiry
+
+struct altos_bt_list {
+ inquiry_info *ii;
+ int sock;
+ int dev_id;
+ int rsp;
+ int num_rsp;
+};
+
+#define INQUIRY_MAX_RSP 255
+
+struct altos_bt_list *
+altos_bt_list_start(int inquiry_time)
+{
+ struct altos_bt_list *bt_list;
+
+ bt_list = calloc(1, sizeof (struct altos_bt_list));
+ if (!bt_list)
+ goto no_bt_list;
+
+ bt_list->ii = calloc(INQUIRY_MAX_RSP, sizeof (inquiry_info));
+ if (!bt_list->ii)
+ goto no_ii;
+ bt_list->dev_id = hci_get_route(NULL);
+ if (bt_list->dev_id < 0)
+ goto no_dev_id;
+
+ bt_list->sock = hci_open_dev(bt_list->dev_id);
+ if (bt_list->sock < 0)
+ goto no_sock;
+
+ bt_list->num_rsp = hci_inquiry(bt_list->dev_id,
+ inquiry_time,
+ INQUIRY_MAX_RSP,
+ NULL,
+ &bt_list->ii,
+ IREQ_CACHE_FLUSH);
+ if (bt_list->num_rsp < 0)
+ goto no_rsp;
+
+ bt_list->rsp = 0;
+ return bt_list;
+
+no_rsp:
+ close(bt_list->sock);
+no_sock:
+no_dev_id:
+ free(bt_list->ii);
+no_ii:
+ free(bt_list);
+no_bt_list:
+ return NULL;
+}
+
+int
+altos_bt_list_next(struct altos_bt_list *bt_list,
+ struct altos_bt_device *device)
+{
+ inquiry_info *ii;
+
+ if (bt_list->rsp >= bt_list->num_rsp)
+ return 0;
+
+ ii = &bt_list->ii[bt_list->rsp];
+ if (ba2str(&ii->bdaddr, device->addr) < 0)
+ return 0;
+ memset(&device->name, '\0', sizeof (device->name));
+ if (hci_read_remote_name(bt_list->sock, &ii->bdaddr,
+ sizeof (device->name),
+ device->name, 0) < 0) {
+ strcpy(device->name, "[unknown]");
+ }
+ bt_list->rsp++;
+ return 1;
+}
+
+void
+altos_bt_list_finish(struct altos_bt_list *bt_list)
+{
+ close(bt_list->sock);
+ free(bt_list->ii);
+ free(bt_list);
+}
+
+void
+altos_bt_fill_in(char *name, char *addr, struct altos_bt_device *device)
+{
+ strncpy(device->name, name, sizeof (device->name));
+ device->name[sizeof(device->name)-1] = '\0';
+ strncpy(device->addr, addr, sizeof (device->addr));
+ device->addr[sizeof(device->addr)-1] = '\0';
+}
+
+struct altos_file *
+altos_bt_open(struct altos_bt_device *device)
+{
+ struct sockaddr_rc addr = { 0 };
+ int status, i;
+ struct altos_file_posix *file;
+
+ file = calloc(1, sizeof (struct altos_file_posix));
+ if (!file) {
+ errno = ENOMEM;
+ altos_set_last_posix_error();
+ goto no_file;
+ }
+ addr.rc_family = AF_BLUETOOTH;
+ addr.rc_channel = 1;
+ if (str2ba(device->addr, &addr.rc_bdaddr) < 0) {
+ altos_set_last_posix_error();
+ goto no_sock;
+ }
+
+ for (i = 0; i < 5; i++) {
+ file->fd = socket(AF_BLUETOOTH, SOCK_STREAM, BTPROTO_RFCOMM);
+ if (file->fd < 0) {
+ altos_set_last_posix_error();
+ goto no_sock;
+ }
+
+ status = connect(file->fd,
+ (struct sockaddr *)&addr,
+ sizeof(addr));
+ if (status >= 0 || errno != EBUSY)
+ break;
+ close(file->fd);
+ usleep(100 * 1000);
+ }
+ if (status < 0) {
+ altos_set_last_posix_error();
+ goto no_link;
+ }
+ usleep(100 * 1000);
+
+#ifdef USE_POLL
+ pipe(file->pipe);
+#else
+ file->out_fd = dup(file->fd);
+#endif
+ return &file->file;
+no_link:
+ close(file->fd);
+no_sock:
+ free(file);
+no_file:
+ return NULL;
+}
+
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