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#include <stdint.h>
#include <stdlib.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <unistd.h>
// usbmuxd public interface
#include "usbmuxd.h"
// usbmuxd protocol
#include "usbmuxd-proto.h"
// socket utility functions
#include "sock_stuff.h"
static int usbmuxd_get_result(int sfd, uint32_t tag, uint32_t * result)
{
struct usbmuxd_result res;
int recv_len;
if (!result) {
return -EINVAL;
}
if ((recv_len = recv_buf(sfd, &res, sizeof(res))) <= 0) {
perror("recv");
return -errno;
} else {
if ((recv_len == sizeof(res))
&& (res.header.length == (uint32_t) recv_len)
&& (res.header.reserved == 0)
&& (res.header.type == USBMUXD_RESULT)
) {
*result = res.result;
if (res.header.tag == tag) {
return 1;
} else {
return 0;
}
}
}
return -1;
}
int usbmuxd_scan(usbmuxd_scan_result ** available_devices)
{
struct usbmuxd_scan_request s_req;
int sfd;
int scan_success = 0;
uint32_t res;
uint32_t pktlen;
int recv_len;
usbmuxd_scan_result *newlist = NULL;
struct usbmuxd_device_info_record dev_info_pkt;
int dev_cnt = 0;
sfd = connect_unix_socket(USBMUXD_SOCKET_FILE);
if (sfd < 0) {
fprintf(stderr, "%s: error opening socket!\n", __func__);
return sfd;
}
s_req.header.length = sizeof(struct usbmuxd_scan_request);
s_req.header.reserved = 0;
s_req.header.type = USBMUXD_SCAN;
s_req.header.tag = 2;
// send scan request packet
if (send_buf(sfd, &s_req, s_req.header.length) ==
(int) s_req.header.length) {
res = -1;
// get response
if (usbmuxd_get_result(sfd, s_req.header.tag, &res) && (res == 0)) {
scan_success = 1;
} else {
fprintf(stderr,
"%s: Did not get response to scan request (with result=0)...\n",
__func__);
close(sfd);
return res;
}
}
if (!scan_success) {
fprintf(stderr, "%s: Could not send scan request!\n", __func__);
return -1;
}
*available_devices = NULL;
// receive device list
while (1) {
if (recv_buf_timeout(sfd, &pktlen, 4, MSG_PEEK, 1000) == 4) {
if (pktlen != sizeof(dev_info_pkt)) {
// invalid packet size received!
fprintf(stderr,
"%s: Invalid packet size (%d) received when expecting a device info record.\n",
__func__, pktlen);
break;
}
recv_len = recv_buf(sfd, &dev_info_pkt, pktlen);
if (recv_len <= 0) {
fprintf(stderr,
"%s: Error when receiving device info record\n",
__func__);
break;
} else if ((uint32_t) recv_len < pktlen) {
fprintf(stderr,
"%s: received less data than specified in header!\n",
__func__);
} else {
//fprintf(stderr, "%s: got device record with id %d, UUID=%s\n", __func__, dev_info_pkt.device_info.device_id, dev_info_pkt.device_info.serial_number);
newlist =
(usbmuxd_scan_result *) realloc(*available_devices,
sizeof
(usbmuxd_scan_result) *
(dev_cnt + 1));
if (newlist) {
newlist[dev_cnt].handle =
(int) dev_info_pkt.device.device_id;
newlist[dev_cnt].product_id =
dev_info_pkt.device.product_id;
memset(newlist[dev_cnt].serial_number, '\0',
sizeof(newlist[dev_cnt].serial_number));
memcpy(newlist[dev_cnt].serial_number,
dev_info_pkt.device.serial_number,
sizeof(dev_info_pkt.device.serial_number));
*available_devices = newlist;
dev_cnt++;
} else {
fprintf(stderr,
"%s: ERROR: out of memory when trying to realloc!\n",
__func__);
break;
}
}
} else {
// we _should_ have all of them now.
// or perhaps an error occured.
break;
}
}
// terminating zero record
newlist =
(usbmuxd_scan_result *) realloc(*available_devices,
sizeof(usbmuxd_scan_result) *
(dev_cnt + 1));
memset(newlist + dev_cnt, 0, sizeof(usbmuxd_scan_result));
*available_devices = newlist;
return dev_cnt;
}
int usbmuxd_connect(const int handle, const unsigned short tcp_port)
{
int sfd;
struct usbmuxd_connect_request c_req;
int connected = 0;
uint32_t res = -1;
sfd = connect_unix_socket(USBMUXD_SOCKET_FILE);
if (sfd < 0) {
fprintf(stderr, "%s: Error: Connection to usbmuxd failed: %s\n",
__func__, strerror(errno));
return sfd;
}
c_req.header.length = sizeof(c_req);
c_req.header.reserved = 0;
c_req.header.type = USBMUXD_CONNECT;
c_req.header.tag = 3;
c_req.device_id = (uint32_t) handle;
c_req.tcp_dport = htons(tcp_port);
c_req.reserved = 0;
if (send_buf(sfd, &c_req, sizeof(c_req)) < 0) {
perror("send");
} else {
// read ACK
//fprintf(stderr, "%s: Reading connect result...\n", __func__);
if (usbmuxd_get_result(sfd, c_req.header.tag, &res)) {
if (res == 0) {
//fprintf(stderr, "%s: Connect success!\n", __func__);
connected = 1;
} else {
fprintf(stderr, "%s: Connect failed, Error code=%d\n",
__func__, res);
}
}
}
if (connected) {
return sfd;
}
close(sfd);
return -1;
}
int usbmuxd_disconnect(int sfd)
{
return close(sfd);
}
int usbmuxd_send(int sfd, const char *data, uint32_t len, uint32_t *sent_bytes)
{
int num_sent;
if (sfd < 0) {
return -EINVAL;
}
num_sent = send(sfd, (void*)data, len, 0);
if (num_sent < 0) {
*sent_bytes = 0;
fprintf(stderr, "%s: Error %d when sending: %s\n", __func__, num_sent, strerror(errno));
return num_sent;
} else if ((uint32_t)num_sent < len) {
fprintf(stderr, "%s: Warning: Did not send enough (only %d of %d)\n", __func__, num_sent, len);
}
*sent_bytes = num_sent;
return 0;
}
int usbmuxd_recv_timeout(int sfd, char *data, uint32_t len, uint32_t *recv_bytes, unsigned int timeout)
{
int num_recv = recv_buf_timeout(sfd, (void*)data, len, 0, timeout);
if (num_recv < 0) {
*recv_bytes = 0;
return num_recv;
}
*recv_bytes = num_recv;
return 0;
}
int usbmuxd_recv(int sfd, char *data, uint32_t len, uint32_t *recv_bytes)
{
return usbmuxd_recv_timeout(sfd, data, len, recv_bytes, 5000);
}
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