usb_dev_handle *usb_open(struct usb_device *dev)
{
// Get remote fd
Packet* pkt = pkt_claim();
int fd = session_get();
// Send packet
pkt_init(pkt, UsbOpen);
pkt_adduint(pkt, dev->bus->location);
pkt_adduint(pkt, dev->devnum);
pkt_send(pkt, fd);
// Get response
int res = -1, devfd = -1;
if(pkt_recv(fd, pkt) > 0 && pkt_op(pkt) == UsbOpen) {
Iterator it;
pkt_begin(pkt, &it);
res = iter_getint(&it);
devfd = iter_getint(&it);
}
// Evaluate
usb_dev_handle* udev = NULL;
if(res >= 0) {
udev = malloc(sizeof(usb_dev_handle));
udev->fd = devfd;
udev->device = dev;
udev->bus = dev->bus;
udev->config = udev->interface = udev->altsetting = -1;
}
pkt_release();
debug_msg("returned %d (fd %d)", res, devfd);
return udev;
}
/* libusb(5):
* Interrupt transfers.
*/
int usb_interrupt_write(usb_dev_handle *dev, int ep, usb_buf_t bytes, int size, int timeout)
{
// Get remote fd
Packet* pkt = pkt_claim();
int fd = session_get();
// Prepare packet
pkt_init(pkt, UsbInterruptWrite);
pkt_addint(pkt, dev->fd);
pkt_addint(pkt, ep);
pkt_addstr(pkt, size, bytes);
pkt_addint(pkt, timeout);
pkt_send(pkt, fd);
// Get response
int res = -1;
if(pkt_recv(fd, pkt) > 0 && pkt_op(pkt) == UsbInterruptWrite) {
Iterator it;
pkt_begin(pkt, &it);
res = iter_getint(&it);
}
// Return response
pkt_release();
debug_msg("returned %d", res);
return res;
}
int usb_reset(usb_dev_handle *dev)
{
// Get remote fd
Packet* pkt = pkt_claim();
int fd = session_get();
// Prepare packet
pkt_init(pkt, UsbReset);
pkt_addint(pkt, dev->fd);
pkt_send(pkt, fd);
// Get response
int res = -1;
if(pkt_recv(fd, pkt) > 0 && pkt_op(pkt) == UsbReset) {
Iterator it;
pkt_begin(pkt, &it);
// Read result
res = iter_getint(&it);
}
// Return response
pkt_release();
debug_msg("returned %d", res);
return res;
}
int usb_get_driver_np(usb_dev_handle *dev, int interface, char *name, unsigned int namelen)
{
// Get remote fd
Packet* pkt = pkt_claim();
int fd = session_get();
// Send packet
pkt_init(pkt, UsbGetKernelDriver);
pkt_addint(pkt, dev->fd);
pkt_addint(pkt, interface);
pkt_adduint(pkt, namelen);
pkt_send(pkt, fd);
// Get response
int res = -1;
if(pkt_recv(fd, pkt) > 0 && pkt_op(pkt) == UsbGetKernelDriver) {
Iterator it;
pkt_begin(pkt, &it);
res = iter_getint(&it);
// Error
if(res) {
error_msg("%s: could not get bound driver", __func__);
}
// Save string
strncpy(name, iter_getstr(&it), namelen - 1);
name[namelen - 1] = '\0';
}
pkt_release();
debug_msg("returned %d (%s)", res, name);
return res;
}
int usb_interrupt_read(usb_dev_handle *dev, int ep, char *bytes, int size, int timeout)
{
// Get remote fd
Packet* pkt = pkt_claim();
int fd = session_get();
// Prepare packet
pkt_init(pkt, UsbInterruptRead);
pkt_addint(pkt, dev->fd);
pkt_addint(pkt, ep);
pkt_addint(pkt, size);
pkt_addint(pkt, timeout);
pkt_send(pkt, fd);
// Get response
int res = -1;
if(pkt_recv(fd, pkt) > 0 && pkt_op(pkt) == UsbInterruptRead) {
Iterator it;
pkt_begin(pkt, &it);
res = iter_getint(&it);
if(res > 0) {
int minlen = (res > size) ? size : res;
memcpy(bytes, it.val, minlen);
}
}
// Return response
pkt_release();
debug_msg("returned %d", res);
return res;
}
static BOOL modem_command (const char *cmd, const char *resp, int timeout)
{
DWORD timer;
int len = cmd ? strlen (cmd) : strlen (resp);
if (cmd)
rc = pkt_send (cmd, len); /**<\todo Bypass PKTDRVR ? */
if (rc < len || !_eth_is_init)
return (FALSE);
timer = set_timeout (1000 * timeout);
while (!chk_timeout(timer))
{
char *pkt = (char*) _eth_arrived (NULL NULL);
if (!pkt)
continue;
outsn (pkt, len); /* print the modem echo */
_eth_free (pkt, type);
return (strncmp(pkt,resp,strlen(resp)) == 0); /* got modem response */
}
return (FALSE);
}
int usb_set_altinterface(usb_dev_handle *dev, int alternate)
{
// Get remote fd
Packet* pkt = pkt_claim();
int fd = session_get();
// Prepare packet
pkt_init(pkt, UsbSetAltInterface);
pkt_addint(pkt, dev->fd);
pkt_addint(pkt, alternate);
pkt_send(pkt, fd);
// Get response
int res = -1;
if(pkt_recv(fd, pkt) > 0 && pkt_op(pkt) == UsbSetAltInterface) {
Iterator it;
pkt_begin(pkt, &it);
// Read result
res = iter_getint(&it);
// Read callback configuration
alternate = iter_getint(&it);
}
// Save configuration
dev->altsetting = alternate;
// Return response
pkt_release();
debug_msg("returned %d", res);
return res;
}
int usb_close(usb_dev_handle *dev)
{
// Get remote fd
Packet* pkt = pkt_claim();
int fd = session_get();
// Send packet
pkt_init(pkt, UsbClose);
pkt_addint(pkt, dev->fd);
pkt_send(pkt, fd);
// Free device
free(dev);
// Get response
int res = -1;
if(pkt_recv(fd, pkt) > 0 && pkt_op(pkt) == UsbClose) {
Iterator it;
pkt_begin(pkt, &it);
res = iter_getint(&it);
}
pkt_release();
debug_msg("returned %d", res);
return res;
}
static int tok_mac_xmit (const void *buf, WORD len)
{
SIO_TRACE (("tok_mac_xmit, len %d", len));
if (len > TOK_MAX) /* Token-Ring has no min. length */
len = TOK_MAX;
return pkt_send (buf, len);
}
static int fddi_mac_xmit (const void *buf, WORD len)
{
SIO_TRACE (("fddi_mac_xmit, len %d", len));
if (len < FDDI_MIN)
len = FDDI_MIN;
else if (len > FDDI_MAX)
len = FDDI_MAX;
return pkt_send (buf, len);
}
static int arcnet_mac_xmit (const void *buf, WORD len)
{
SIO_TRACE (("arcnet_mac_xmit, len %d", len));
if (len < ARCNET_MIN)
len = ARCNET_MIN;
else if (len > ARCNET_MAX)
len = ARCNET_MAX;
return pkt_send (buf, len);
}
/**
* Functions called via function pointer `mac_transmit' to
* actually send the data.
*/
static int eth_mac_xmit (const void *buf, WORD len)
{
SIO_TRACE (("eth_mac_xmit, len %d", len));
if (len < ETH_MIN)
len = ETH_MIN; /* zero padding already done in eth_mac_format() */
else if (len > ETH_MAX)
len = ETH_MAX;
return pkt_send (buf, len);
}
/** Initialize USB subsystem. */
void usb_init(void)
{
// Initialize packet & remote fd
Packet* pkt = pkt_claim();
int fd = session_get();
// Create buffer
pkt_init(pkt, UsbInit);
pkt_send(pkt, fd);
pkt_release();
// Initialize locally
debug_msg("called");
}
int usb_control_msg(usb_dev_handle *dev, int requesttype, int request,
int value, int index, char *bytes, int size, int timeout)
{
// Get remote fd
Packet* pkt = pkt_claim();
int fd = session_get();
// Prepare packet
pkt_init(pkt, UsbControlMsg);
pkt_addint(pkt, dev->fd);
pkt_addint(pkt, requesttype);
pkt_addint(pkt, request);
pkt_addint(pkt, value);
pkt_addint(pkt, index);
pkt_addstr(pkt, size, bytes);
pkt_addint(pkt, timeout);
pkt_send(pkt, fd);
// Get response
int res = -1;
if(pkt_recv(fd, pkt) > 0 && pkt_op(pkt) == UsbControlMsg) {
Iterator it;
pkt_begin(pkt, &it);
res = iter_getint(&it);
if(res > 0) {
int minlen = (res > size) ? size : res;
memcpy(bytes, it.val, minlen);
}
}
// Return response
pkt_release();
debug_msg("returned %d", res);
return res;
}
int usb_detach_kernel_driver_np(usb_dev_handle *dev, int interface)
{
// Get remote fd
Packet* pkt = pkt_claim();
int fd = session_get();
// Send packet
pkt_init(pkt, UsbDetachKernelDriver);
pkt_addint(pkt, dev->fd);
pkt_addint(pkt, interface);
pkt_send(pkt, fd);
// Get response
int res = -1;
if(pkt_recv(fd, pkt) > 0 && pkt_op(pkt) == UsbDetachKernelDriver) {
Iterator it;
pkt_begin(pkt, &it);
res = iter_getint(&it);
}
pkt_release();
debug_msg("returned %d", res);
return res;
}
/** Find busses on remote host.
\warning Does not transfer busses to local virtual bus list.
*/
int usb_find_busses(void)
{
// Get remote fd
Packet* pkt = pkt_claim();
int fd = session_get();
// Initialize pkt
pkt_init(pkt, UsbFindBusses);
pkt_send(pkt, fd);
// Get number of changes
int res = 0;
Iterator it;
if(pkt_recv(fd, pkt) > 0 && pkt_op(pkt) == UsbFindBusses) {
if(pkt_begin(pkt, &it) != NULL) {
res = iter_getint(&it);
}
}
// Return remote result
pkt_release();
debug_msg("returned %d", res);
return res;
}
/*---------------------------------------------------------------------------*/
void icmp_pkt_rx (netif_t *netif, net_buf_t *net_buf)
{
icmp_hdr_t *icmp_pkt_in, *icmp_pkt_out ;
ipv4_hdr_t *ipv4_hdr_in, *ipv4_hdr_out ;
eth_hdr_t *eth_hdr_in ;
pkt_t *pkt ;
eth_hdr_in = (eth_hdr_t *) ((usys) net_buf->data) ;
ipv4_hdr_in = (ipv4_hdr_t *) (((usys) net_buf->data) + ETH_HDR_SIZE) ;
icmp_pkt_in = (icmp_hdr_t *) (((usys) net_buf->data) + ETH_HDR_SIZE +
IPV4_HDR_SIZE) ;
switch (icmp_pkt_in->type)
{
case MSG_TYPE_ECHO_REQUEST :
/* Alloc the frame */
if ((pkt = pkt_alloc (netif)) == NULL)
{
printf ("ERR: pkt_alloc() failed in handle_arp_pkt() !!\n") ;
return ;
}
/* Fill out the icmp header and data */
icmp_pkt_out = (icmp_hdr_t *) (((usys) pkt) +
ETH_HDR_SIZE +
IPV4_HDR_SIZE) ;
icmp_pkt_out->type = MSG_TYPE_ECHO_REPLY ;
icmp_pkt_out->code = 0 ;
icmp_pkt_out->id = icmp_pkt_in->id ;
icmp_pkt_out->seq = icmp_pkt_in->seq ;
memcpy (++icmp_pkt_out, ++icmp_pkt_in,
ntohs(ipv4_hdr_in->len) - IPV4_HDR_SIZE - ICMP_HDR_SIZE) ;
icmp_pkt_out -- ;
icmp_pkt_out->csum = ~crc16_calc ((u8 *) icmp_pkt_out,
ntohs(ipv4_hdr_in->len) -
IPV4_HDR_SIZE) ;
/* Initialize the ip header */
ipv4_hdr_out = (ipv4_hdr_t *) (((usys) pkt) + ETH_HDR_SIZE) ;
ipv4_hdr_init (netif, ipv4_hdr_out,
ntohs(ipv4_hdr_in->len),
IPV4_PROTOCOL_ICMP, ntohl(ipv4_hdr_in->src)) ;
/* Initialize the eth header */
eth_hdr_init (netif, pkt, eth_hdr_in->src_mac, ETH_TYPE_IPV4) ;
pkt_send (netif, pkt, ntohs(ipv4_hdr_in->len) +
ETH_HDR_SIZE) ;
pkt_free (netif, pkt) ;
break ;
default :
break ;
}
} /* End of function icmp_pkt_rx () */
static int null_mac_xmit (const void *buf, WORD len)
{
SIO_TRACE (("null_mac_xmit, len %d", len));
return pkt_send (buf, len);
}
int nmrp_do(struct nmrpd_args *args)
{
struct nmrp_pkt tx, rx;
uint8_t *src, dest[6];
uint16_t len, region;
char *filename;
time_t beg;
int i, status, ulreqs, expect, upload_ok, autoip;
struct ethsock *sock;
uint32_t intf_addr;
void (*sigh_orig)(int);
struct {
struct in_addr addr;
struct in_addr mask;
} PACKED ipconf;
if (args->op != NMRP_UPLOAD_FW) {
fprintf(stderr, "Operation not implemented.\n");
return 1;
}
if (!mac_parse(args->mac, dest)) {
fprintf(stderr, "Invalid MAC address '%s'.\n", args->mac);
return 1;
}
if ((ipconf.mask.s_addr = inet_addr(args->ipmask)) == INADDR_NONE) {
fprintf(stderr, "Invalid subnet mask '%s'.\n", args->ipmask);
return 1;
}
if (!args->ipaddr) {
autoip = true;
/* The MAC of the device that was used to test this utility starts
* with a4:2b:8c, hence 164 (0xa4) and 183 (0x2b + 0x8c)
*/
args->ipaddr = "10.164.183.252";
if (!args->ipaddr_intf) {
args->ipaddr_intf = "10.164.183.253";
}
} else if (args->ipaddr_intf) {
autoip = true;
} else {
autoip = false;
}
if ((ipconf.addr.s_addr = inet_addr(args->ipaddr)) == INADDR_NONE) {
fprintf(stderr, "Invalid IP address '%s'.\n", args->ipaddr);
return 1;
}
if (args->ipaddr_intf && (intf_addr = inet_addr(args->ipaddr_intf)) == INADDR_NONE) {
fprintf(stderr, "Invalid IP address '%s'.\n", args->ipaddr_intf);
return 1;
}
if (args->file_local && strcmp(args->file_local, "-") && access(args->file_local, R_OK) == -1) {
fprintf(stderr, "Error accessing file '%s'.\n", args->file_local);
return 1;
}
if (args->file_remote) {
if (!tftp_is_valid_filename(args->file_remote)) {
fprintf(stderr, "Invalid remote filename '%s'.\n",
args->file_remote);
return 1;
}
}
if (args->region) {
region = htons(to_region_code(args->region));
if (!region) {
fprintf(stderr, "Invalid region code '%s'.\n", args->region);
return 1;
}
} else {
region = 0;
}
status = 1;
sock = ethsock_create(args->intf, ETH_P_NMRP);
if (!sock) {
return 1;
}
gsock = sock;
garp = 0;
sigh_orig = signal(SIGINT, sigh);
if (!autoip) {
status = is_valid_ip(sock, &ipconf.addr, &ipconf.mask);
if (status <= 0) {
if (!status) {
fprintf(stderr, "Address %s/%s cannot be used on interface %s.\n",
args->ipaddr, args->ipmask, args->intf);
}
goto out;
}
} else {
if (verbosity) {
printf("Adding %s to interface %s.\n", args->ipaddr_intf, args->intf);
}
if (ethsock_ip_add(sock, intf_addr, ipconf.mask.s_addr, &gundo) != 0) {
goto out;
}
}
if (ethsock_set_timeout(sock, args->rx_timeout)) {
goto out;
}
src = ethsock_get_hwaddr(sock);
if (!src) {
goto out;
}
memcpy(tx.eh.ether_shost, src, 6);
memcpy(tx.eh.ether_dhost, dest, 6);
tx.eh.ether_type = htons(ETH_P_NMRP);
msg_init(&tx.msg, NMRP_C_ADVERTISE);
msg_opt_add(&tx.msg, NMRP_O_MAGIC_NO, "NTGR", 4);
msg_hton(&tx.msg);
i = 0;
upload_ok = 0;
beg = time(NULL);
while (1) {
printf("\rAdvertising NMRP server on %s ... %c",
args->intf, spinner[i]);
fflush(stdout);
i = (i + 1) & 3;
if (pkt_send(sock, &tx) < 0) {
perror("sendto");
goto out;
}
status = pkt_recv(sock, &rx);
if (status == 0 && memcmp(rx.eh.ether_dhost, src, 6) == 0) {
break;
} else if (status == 1) {
goto out;
} else {
if ((time(NULL) - beg) >= 60) {
printf("\nNo response after 60 seconds. Bailing out.\n");
goto out;
}
}
}
printf("\n");
expect = NMRP_C_CONF_REQ;
ulreqs = 0;
do {
if (expect != NMRP_C_NONE && rx.msg.code != expect) {
fprintf(stderr, "Received %s while waiting for %s!\n",
msg_code_str(rx.msg.code), msg_code_str(expect));
}
msg_init(&tx.msg, NMRP_C_NONE);
status = 1;
switch (rx.msg.code) {
case NMRP_C_ADVERTISE:
printf("Received NMRP advertisement from %s.\n",
mac_to_str(rx.eh.ether_shost));
status = 1;
goto out;
case NMRP_C_CONF_REQ:
tx.msg.code = NMRP_C_CONF_ACK;
msg_opt_add(&tx.msg, NMRP_O_DEV_IP, &ipconf, 8);
msg_opt_add(&tx.msg, NMRP_O_FW_UP, NULL, 0);
#ifdef NMRPFLASH_SET_REGION
if (region) {
msg_opt_add(&tx.msg, NMRP_O_DEV_REGION, ®ion, 2);
}
#endif
expect = NMRP_C_TFTP_UL_REQ;
printf("Received configuration request from %s.\n",
mac_to_str(rx.eh.ether_shost));
memcpy(tx.eh.ether_dhost, rx.eh.ether_shost, 6);
printf("Sending configuration: ip %s, mask %s.\n",
args->ipaddr, args->ipmask);
memcpy(arpmac, rx.eh.ether_shost, 6);
memcpy(&arpip, &ipconf.addr, sizeof(ipconf.addr));
if (ethsock_arp_add(sock, arpmac, &arpip) != 0) {
goto out;
}
garp = 1;
break;
case NMRP_C_TFTP_UL_REQ:
if (!upload_ok) {
if (++ulreqs > 5) {
printf("Bailing out after %d upload requests.\n",
ulreqs);
tx.msg.code = NMRP_C_CLOSE_REQ;
break;
}
} else {
if (verbosity) {
printf("Ignoring extra upload request.\n");
}
ethsock_set_timeout(sock, args->ul_timeout);
tx.msg.code = NMRP_C_KEEP_ALIVE_REQ;
break;
}
len = 0;
filename = msg_opt_data(&rx.msg, NMRP_O_FILE_NAME, &len);
if (filename) {
if (!args->file_remote) {
args->file_remote = filename;
}
printf("Received upload request: filename '%.*s'.\n",
len, filename);
} else if (!args->file_remote) {
args->file_remote = args->file_local;
printf("Received upload request with empty filename.\n");
}
status = 0;
if (args->tftpcmd) {
printf("Executing '%s' ... \n", args->tftpcmd);
setenv("IP", inet_ntoa(ipconf.addr), 1);
setenv("MAC", mac_to_str(rx.eh.ether_shost), 1);
setenv("NETMASK", inet_ntoa(ipconf.mask), 1);
status = system(args->tftpcmd);
}
if (!status && args->file_local) {
if (!autoip) {
status = is_valid_ip(sock, &ipconf.addr, &ipconf.mask);
if (status < 0) {
goto out;
} else if (!status) {
printf("IP address of %s has changed. Please assign a "
"static ip to the interface.\n", args->intf);
tx.msg.code = NMRP_C_CLOSE_REQ;
break;
}
}
if (verbosity) {
printf("Using remote filename '%s'.\n",
args->file_remote);
}
if (!strcmp(args->file_local, "-")) {
printf("Uploading from stdin ... ");
} else {
printf("Uploading %s ... ", leafname(args->file_local));
}
fflush(stdout);
status = tftp_put(args);
}
if (!status) {
printf("OK\nWaiting for remote to respond.\n");
upload_ok = 1;
ethsock_set_timeout(sock, args->ul_timeout);
tx.msg.code = NMRP_C_KEEP_ALIVE_REQ;
expect = NMRP_C_NONE;
} else if (status == -2) {
expect = NMRP_C_TFTP_UL_REQ;
} else {
goto out;
}
break;
case NMRP_C_KEEP_ALIVE_REQ:
tx.msg.code = NMRP_C_KEEP_ALIVE_ACK;
ethsock_set_timeout(sock, args->ul_timeout);
printf("Received keep-alive request.\n");
break;
case NMRP_C_CLOSE_REQ:
tx.msg.code = NMRP_C_CLOSE_ACK;
break;
case NMRP_C_CLOSE_ACK:
status = 0;
goto out;
default:
fprintf(stderr, "Unknown message code 0x%02x!\n",
rx.msg.code);
msg_dump(&rx.msg, 0);
}
if (tx.msg.code != NMRP_C_NONE) {
msg_hton(&tx.msg);
if (pkt_send(sock, &tx) < 0) {
perror("sendto");
goto out;
}
if (tx.msg.code == NMRP_C_CLOSE_REQ) {
goto out;
}
}
if (rx.msg.code == NMRP_C_CLOSE_REQ) {
printf("Remote finished. Closing connection.\n");
break;
}
status = pkt_recv(sock, &rx);
if (status) {
if (status == 2) {
fprintf(stderr, "Timeout while waiting for %s.\n",
msg_code_str(expect));
}
goto out;
}
ethsock_set_timeout(sock, args->rx_timeout);
} while (1);
status = 0;
if (ulreqs) {
printf("Reboot your device now.\n");
} else {
printf("No upload request received.\n");
}
out:
signal(SIGINT, sigh_orig);
gsock = NULL;
ethsock_arp_del(sock, arpmac, &arpip);
ethsock_ip_del(sock, &gundo);
ethsock_close(sock);
return status;
}
/** Find devices on remote host.
* Create new devices on local virtual bus.
* \warning Function replaces global usb_busses variable from libusb.
*/
int usb_find_devices(void)
{
// Get remote fd
Packet* pkt = pkt_claim();
int fd = session_get();
// Create buffer
pkt_init(pkt, UsbFindDevices);
pkt_send(pkt, fd);
// Get number of changes
int res = 0;
Iterator it;
if(pkt_recv(fd, pkt) > 0) {
pkt_begin(pkt, &it);
// Get return value
res = iter_getint(&it);
// Allocate virtualbus
struct usb_bus vbus;
vbus.next = __remote_bus;
struct usb_bus* rbus = &vbus;
// Get busses
while(!iter_end(&it)) {
// Evaluate
if(it.type == StructureType) {
iter_enter(&it);
// Allocate bus
if(rbus->next == NULL) {
// Allocate next item
struct usb_bus* nbus = malloc(sizeof(struct usb_bus));
memset(nbus, 0, sizeof(struct usb_bus));
rbus->next = nbus;
nbus->prev = rbus;
rbus = nbus;
}
else
rbus = rbus->next;
// Read dirname
strcpy(rbus->dirname, iter_getstr(&it));
// Read location
rbus->location = iter_getuint(&it);
// Read devices
struct usb_device vdev;
vdev.next = rbus->devices;
struct usb_device* dev = &vdev;
while(it.type == SequenceType) {
iter_enter(&it);
// Initialize
if(dev->next == NULL) {
dev->next = malloc(sizeof(struct usb_device));
memset(dev->next, 0, sizeof(struct usb_device));
dev->next->bus = rbus;
if(dev != &vdev)
dev->next->prev = dev;
if(rbus->devices == NULL)
rbus->devices = dev->next;
}
dev = dev->next;
// Read filename
strcpy(dev->filename, iter_getstr(&it));
// Read devnum
dev->devnum = iter_getuint(&it);
// Read descriptor
// Apply byte-order conversion for 16/32bit integers
memcpy(&dev->descriptor, it.val, it.len);
dev->descriptor.bcdUSB = ntohs(dev->descriptor.bcdUSB);
dev->descriptor.idVendor = ntohs(dev->descriptor.idVendor);
dev->descriptor.idProduct = ntohs(dev->descriptor.idProduct);
dev->descriptor.bcdDevice = ntohs(dev->descriptor.bcdDevice);
iter_next(&it);
// Alloc configurations
unsigned cfgid = 0, cfgnum = dev->descriptor.bNumConfigurations;
dev->config = NULL;
if(cfgnum > 0) {
dev->config = malloc(cfgnum * sizeof(struct usb_config_descriptor));
memset(dev->config, 0, cfgnum * sizeof(struct usb_config_descriptor));
}
// Read config
while(it.type == RawType && cfgid < cfgnum) {
struct usb_config_descriptor* cfg = &dev->config[cfgid];
++cfgid;
// Ensure struct under/overlap
int szlen = sizeof(struct usb_config_descriptor);
if(szlen > it.len)
szlen = it.len;
// Read config and apply byte-order conversion
memcpy(cfg, it.val, szlen);
cfg->wTotalLength = ntohs(cfg->wTotalLength);
// Allocate interfaces
cfg->interface = NULL;
if(cfg->bNumInterfaces > 0) {
cfg->interface = malloc(cfg->bNumInterfaces * sizeof(struct usb_interface));
}
//! \test Implement usb_device extra interfaces - are they needed?
cfg->extralen = 0;
cfg->extra = NULL;
iter_next(&it);
// Load interfaces
unsigned i, j, k;
for(i = 0; i < cfg->bNumInterfaces; ++i) {
struct usb_interface* iface = &cfg->interface[i];
// Read altsettings count
iface->num_altsetting = iter_getint(&it);
// Allocate altsettings
if(iface->num_altsetting > 0) {
iface->altsetting = malloc(iface->num_altsetting * sizeof(struct usb_interface_descriptor));
}
// Load altsettings
for(j = 0; j < iface->num_altsetting; ++j) {
// Ensure struct under/overlap
struct usb_interface_descriptor* as = &iface->altsetting[j];
int szlen = sizeof(struct usb_interface_descriptor);
if(szlen > it.len)
szlen = it.len;
// Read altsettings - no conversions apply
memcpy(as, it.val, szlen);
iter_next(&it);
// Allocate endpoints
as->endpoint = NULL;
if(as->bNumEndpoints > 0) {
size_t epsize = as->bNumEndpoints * sizeof(struct usb_endpoint_descriptor);
as->endpoint = malloc(epsize);
memset(as->endpoint, 0, epsize);
}
// Load endpoints
for(k = 0; k < as->bNumEndpoints; ++k) {
struct usb_endpoint_descriptor* endpoint = &as->endpoint[k];
int szlen = sizeof(struct usb_endpoint_descriptor);
if(szlen > it.len)
szlen = it.len;
// Read endpoint and apply conversion
memcpy(endpoint, it.val, szlen);
endpoint->wMaxPacketSize = ntohs(endpoint->wMaxPacketSize);
iter_next(&it);
// Null extra descriptors.
endpoint->extralen = 0;
endpoint->extra = NULL;
}
// Read extra interface descriptors
as->extralen = as_int(it.val, it.len);
iter_next(&it);
if(as->extralen > 0){
as->extra = malloc(as->extralen);
int szlen = as->extralen;
if(szlen > it.len)
szlen = it.len;
memcpy(as->extra, it.val, szlen);
iter_next(&it);
}
else
as->extra = NULL;
}
}
}
//log_msg("Bus %s Device %s: ID %04x:%04x", rbus->dirname, dev->filename, dev->descriptor.idVendor, dev->descriptor.idProduct);
}
// Free unused devices
while(dev->next != NULL) {
struct usb_device* ddev = dev->next;
debug_msg("deleting device %03d", ddev->devnum);
dev->next = ddev->next;
free(ddev);
}
}
else {
debug_msg("unexpected item identifier 0x%02x", it.type);
iter_next(&it);
}
}
// Deallocate unnecessary busses
while(rbus->next != NULL) {
debug_msg("deleting bus %03d", rbus->next->location);
struct usb_bus* bus = rbus->next;
rbus->next = bus->next;
}
// Save busses
if(__remote_bus == NULL) {
__orig_bus = usb_busses;
debug_msg("overriding global usb_busses from %p to %p", usb_busses, vbus.next);
}
__remote_bus = vbus.next;
usb_busses = __remote_bus;
}
// Return remote result
pkt_release();
debug_msg("returned %d", res);
return res;
}
