mirror of git://git.sysmocom.de/ofono
mbim: Implement MBIM_OPEN_MSG
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4e058ece2c
commit
076faf21d7
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@ -23,11 +23,23 @@
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#include <config.h>
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#endif
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#define _GNU_SOURCE
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#include <unistd.h>
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#include <limits.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <linux/types.h>
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#include <ell/ell.h>
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#include "mbim.h"
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#include "mbim-message.h"
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#include "mbim-private.h"
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#define MAX_CONTROL_TRANSFER 4096
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#define HEADER_SIZE (sizeof(struct mbim_message_header) + \
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sizeof(struct mbim_fragment_header))
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const uint8_t mbim_uuid_basic_connect[] = {
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0xa2, 0x89, 0xcc, 0x33, 0xbc, 0xbb, 0x8b, 0x4f, 0xb6, 0xb0,
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@ -69,6 +81,7 @@ struct mbim_device {
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struct l_io *io;
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uint32_t max_segment_size;
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uint32_t max_outstanding;
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uint32_t next_tid;
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mbim_device_debug_func_t debug_handler;
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void *debug_data;
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mbim_device_destroy_func_t debug_destroy;
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@ -78,8 +91,23 @@ struct mbim_device {
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mbim_device_ready_func_t ready_handler;
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mbim_device_destroy_func_t ready_destroy;
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void *ready_data;
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uint8_t header[HEADER_SIZE];
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size_t header_offset;
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size_t segment_bytes_remaining;
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};
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static inline uint32_t _mbim_device_get_next_tid(struct mbim_device *device)
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{
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uint32_t tid = device->next_tid;
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if (device->next_tid == UINT_MAX)
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device->next_tid = 1;
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else
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device->next_tid += 1;
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return tid;
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}
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static void disconnect_handler(struct l_io *io, void *user_data)
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{
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struct mbim_device *device = user_data;
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@ -90,13 +118,126 @@ static void disconnect_handler(struct l_io *io, void *user_data)
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device->disconnect_handler(device->disconnect_data);
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}
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static int receive_header(struct mbim_device *device, int fd)
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{
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size_t to_read = sizeof(struct mbim_message_header) -
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device->header_offset;
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ssize_t len = TEMP_FAILURE_RETRY(read(fd,
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device->header + device->header_offset,
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to_read));
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if (len < 0) {
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if (errno == EAGAIN)
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return true;
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return false;
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}
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l_util_hexdump(true, device->header + device->header_offset, len,
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device->debug_handler, device->debug_data);
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device->header_offset += len;
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return true;
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}
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static bool command_write_handler(struct l_io *io, void *user_data)
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{
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return false;
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}
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static bool command_read_handler(struct l_io *io, void *user_data)
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{
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return false;
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}
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static bool open_write_handler(struct l_io *io, void *user_data)
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{
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struct mbim_device *device = user_data;
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ssize_t written;
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int fd;
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uint32_t buf[4];
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/* Fill out buf with a MBIM_OPEN_MSG pdu */
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buf[0] = L_CPU_TO_LE32(MBIM_OPEN_MSG);
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buf[1] = L_CPU_TO_LE32(sizeof(buf));
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buf[2] = L_CPU_TO_LE32(_mbim_device_get_next_tid(device));
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buf[3] = L_CPU_TO_LE32(device->max_segment_size);
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fd = l_io_get_fd(io);
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written = TEMP_FAILURE_RETRY(write(fd, buf, sizeof(buf)));
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if (written < 0)
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return false;
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l_util_hexdump(false, buf, written,
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device->debug_handler, device->debug_data);
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return false;
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}
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static bool open_read_handler(struct l_io *io, void *user_data)
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{
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struct mbim_device *device = user_data;
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uint8_t buf[MAX_CONTROL_TRANSFER];
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ssize_t len;
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uint32_t type;
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int fd;
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struct mbim_message_header *hdr;
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fd = l_io_get_fd(io);
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if (device->header_offset < sizeof(struct mbim_message_header)) {
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if (!receive_header(device, fd))
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return false;
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if (device->header_offset != sizeof(struct mbim_message_header))
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return true;
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}
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hdr = (struct mbim_message_header *) device->header;
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type = L_LE32_TO_CPU(hdr->type);
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if (device->segment_bytes_remaining == 0) {
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if (type == MBIM_OPEN_DONE)
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device->segment_bytes_remaining = 4;
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else
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device->segment_bytes_remaining =
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L_LE32_TO_CPU(hdr->len) -
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sizeof(struct mbim_message_header);
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}
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len = TEMP_FAILURE_RETRY(read(fd, buf,
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device->segment_bytes_remaining));
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if (len < 0) {
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if (errno == EAGAIN)
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return true;
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return false;
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}
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l_util_hexdump(true, buf, len,
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device->debug_handler, device->debug_data);
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device->segment_bytes_remaining -= len;
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/* Ready to read next packet */
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if (!device->segment_bytes_remaining)
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device->header_offset = 0;
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if (type != MBIM_OPEN_DONE)
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return true;
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/* Grab OPEN_DONE Status field */
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if (l_get_le32(buf) != 0) {
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close(fd);
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return false;
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}
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if (device->ready_handler)
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device->ready_handler(device->ready_data);
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l_io_set_read_handler(device->io, command_read_handler, device, NULL);
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l_io_set_write_handler(device->io, command_write_handler, device, NULL);
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return true;
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}
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@ -108,8 +249,14 @@ struct mbim_device *mbim_device_new(int fd, uint32_t max_segment_size)
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return NULL;
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device = l_new(struct mbim_device, 1);
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if (max_segment_size > MAX_CONTROL_TRANSFER)
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max_segment_size = MAX_CONTROL_TRANSFER;
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device->max_segment_size = max_segment_size;
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device->max_outstanding = 1;
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device->next_tid = 1;
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device->io = l_io_new(fd);
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l_io_set_disconnect_handler(device->io, disconnect_handler,
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@ -139,7 +286,10 @@ void mbim_device_unref(struct mbim_device *device)
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if (__sync_sub_and_fetch(&device->ref_count, 1))
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return;
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l_io_destroy(device->io);
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if (device->io) {
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l_io_destroy(device->io);
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device->io = NULL;
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}
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if (device->debug_destroy)
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device->debug_destroy(device->debug_data);
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