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4 Commits
16119c5725 ... driver_ray

Author SHA1 Message Date
rltbg
0ca4a10aa4 working usb negociation 
networkmanager compatibility
 2026-02-17 15:23:16 +01:00
Tiago Batista Cardoso
46e2d50a55 renamed 349 -> 397 2026-02-17 15:22:20 +01:00
TIBERGHIEN corentin
95889d091c gitignore 2026-02-17 15:11:25 +01:00
TIBERGHIEN corentin
32c039da54 send_eth 2026-02-17 15:10:34 +01:00
6 changed files with 158 additions and 75 deletions
Expand all files Collapse all files

3
.gitignore vendored Normal file
View File

@@ -0,0 +1,3 @@
build
compile_commands.json
.module-commands.o

4
Makefile
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@@ -1,4 +1,4 @@
MODULE_NAME := ch349_driver MODULE_NAME := ch397_driver
obj-m := $(MODULE_NAME).o obj-m := $(MODULE_NAME).o
SRC_DIR := src SRC_DIR := src
@@ -6,7 +6,7 @@ BUILD_DIR := build
KDIR := /lib/modules/$(shell uname -r)/build KDIR := /lib/modules/$(shell uname -r)/build
$(MODULE_NAME)-objs := $(SRC_DIR)/ch349_driver.o $(MODULE_NAME)-objs := $(SRC_DIR)/ch397_driver.o
ccflags-y := -std=gnu11 -Wno-declaration-after-statement ccflags-y := -std=gnu11 -Wno-declaration-after-statement

4
README.md
View File

@@ -26,7 +26,7 @@ sudo update-initramfs -u
``` ```
En l'etat (5/2/26) le driver s'installe, s'attache au device ch349 puis creer une interface reseau sur la machine. on peut alors recuperer le nom de l'interface grace a : En l'etat (5/2/26) le driver s'installe, s'attache au device ch397 puis creer une interface reseau sur la machine. on peut alors recuperer le nom de l'interface grace a :
``` ```
ip a ip a
@@ -39,7 +39,7 @@ sudo ip addr add 192.168.1.100/24 dev <nom_interface>
sudo ip link set <nom_interface> up sudo ip link set <nom_interface> up
``` ```
ce qui nous permet ensuite, depuis une autre machine d'envoyer des pings a l'ip (192.168.1.100) qui sont ensuite parses en hexadecimal et affiches sur l'interface usb (visibles en executant dmesg | grep ch349) ce qui nous permet ensuite, depuis une autre machine d'envoyer des pings a l'ip (192.168.1.100) qui sont ensuite parses en hexadecimal et affiches sur l'interface usb (visibles en executant dmesg | grep ch397)
## Todo ## Todo

2
docs/useful_commands.txt
View File

@@ -11,4 +11,4 @@ make -- compile
make clean -- clean make clean -- clean
make install -- build and load driver make install -- build and load driver
make uninstall -- deload driver make uninstall -- deload driver
make bear -- use bear to generate compile_commands.json to fix lsp errors make bear -- use bear to generate compile_commands.json to fix lsp errors (might need to manually tweak compile_commands.json to suppress some unsupported arguments errors)

81
send_eth.c Normal file
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@@ -0,0 +1,81 @@
// commande : sudo ./send_eth <ifname> <dst-mac> <src-mac> <ethertype(hex)> <payload-as-string>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <linux/if_packet.h>
#include <linux/if_ether.h>
#include <linux/if.h>
static int mac_from_str(const char *s, unsigned char *mac) {
int vals[6];
if (sscanf(s, "%x:%x:%x:%x:%x:%x",
&vals[0], &vals[1], &vals[2],
&vals[3], &vals[4], &vals[5]) != 6) return -1;
for (int i = 0; i < 6; ++i) mac[i] = (unsigned char)vals[i];
return 0;
}
int main(int argc, char **argv) {
if (argc < 6) {
fprintf(stderr, "Usage: %s <ifname> <dst-mac> <src-mac> <ethertype(hex)> <payload>\n", argv[0]);
return 1;
}
const char *ifname = argv[1];
unsigned char dst_mac[6], src_mac[6];
if (mac_from_str(argv[2], dst_mac) < 0) { fprintf(stderr, "Bad dst-mac\n"); return 1; }
if (mac_from_str(argv[3], src_mac) < 0) { fprintf(stderr, "Bad src-mac\n"); return 1; }
unsigned int ethertype;
if (sscanf(argv[4], "%x", &ethertype) != 1) { fprintf(stderr, "Bad ethertype\n"); return 1; }
const char *payload = argv[5];
size_t payload_len = strlen(payload);
int sock = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
if (sock == -1) { perror("socket"); return 1; }
struct ifreq ifr;
memset(&ifr, 0, sizeof(ifr));
strncpy(ifr.ifr_name, ifname, IFNAMSIZ-1);
if (ioctl(sock, SIOCGIFINDEX, &ifr) == -1) { perror("SIOCGIFINDEX"); close(sock); return 1; }
int ifindex = ifr.ifr_ifindex;
unsigned char frame[ETH_FRAME_LEN];
size_t frame_len = 0;
memcpy(frame + frame_len, dst_mac, 6); frame_len += 6;
memcpy(frame + frame_len, src_mac, 6); frame_len += 6;
frame[frame_len++] = (ethertype >> 8) & 0xff;
frame[frame_len++] = ethertype & 0xff;
if (payload_len + frame_len > ETH_DATA_LEN + ETH_HLEN) {
fprintf(stderr, "Payload too large\n"); close(sock); return 1;
}
memcpy(frame + frame_len, payload, payload_len);
frame_len += payload_len;
if (frame_len < 60) {
memset(frame + frame_len, 0, 60 - frame_len);
frame_len = 60;
}
struct sockaddr_ll sock_addr;
memset(&sock_addr, 0, sizeof(sock_addr));
sock_addr.sll_ifindex = ifindex;
sock_addr.sll_halen = ETH_ALEN;
memcpy(sock_addr.sll_addr, dst_mac, 6);
ssize_t sent = sendto(sock, frame, frame_len, 0, (struct sockaddr*)&sock_addr, sizeof(sock_addr));
if (sent == -1) { perror("sendto"); close(sock); return 1; }
printf("Sent %zd bytes on %s\n", sent, ifname);
close(sock);
return 0;
}

137
src/ch349_driver.c → src/ch397_driver.c
View File

@@ -12,10 +12,10 @@
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/usb.h> #include <linux/usb.h>
#define CH349_VENDOR_ID 0x1a86 #define CH397_VENDOR_ID 0x1a86
#define CH349_PRODUCT_ID 0x5397 #define CH397_PRODUCT_ID 0x5397
struct ch349_device { struct ch397_device {
struct usb_device *udev; struct usb_device *udev;
struct usb_interface *interface; struct usb_interface *interface;
struct mutex io_mutex; struct mutex io_mutex;
@@ -28,14 +28,15 @@ struct ch349_device {
struct net_device *netdev; struct net_device *netdev;
}; };
static const struct usb_device_id ch349_table[] = { static const struct usb_device_id ch397_table[] = {
{ USB_DEVICE(CH349_VENDOR_ID, CH349_PRODUCT_ID) },
{ USB_DEVICE(CH397_VENDOR_ID, CH397_PRODUCT_ID) },
{} {}
}; };
MODULE_DEVICE_TABLE(usb, ch349_table); MODULE_DEVICE_TABLE(usb, ch397_table);
// Fonction pour récupérer la MAC // Fonction pour récupérer la MAC
static int ch349_get_mac_address(struct ch349_device *dev, u8 *mac) static int ch397_get_mac_address(struct ch397_device *dev, u8 *mac)
{ {
char buf[13]; char buf[13];
int ret, i; int ret, i;
@@ -62,7 +63,7 @@ static int ch349_get_mac_address(struct ch349_device *dev, u8 *mac)
return 0; return 0;
} }
static void ch349_hexdump(const struct device *dev, const char *prefix, static void ch397_hexdump(const struct device *dev, const char *prefix,
const void *data, size_t len) const void *data, size_t len)
{ {
const unsigned char *buf = data; const unsigned char *buf = data;
@@ -93,9 +94,9 @@ static void ch349_hexdump(const struct device *dev, const char *prefix,
} }
} }
static void ch349_read_callback(struct urb *urb) static void ch397_read_callback(struct urb *urb)
{ {
struct ch349_device *dev = urb->context; struct ch397_device *dev = urb->context;
struct net_device *netdev = dev->netdev; struct net_device *netdev = dev->netdev;
struct sk_buff *skb; struct sk_buff *skb;
@@ -105,9 +106,9 @@ static void ch349_read_callback(struct urb *urb)
case 0: // Success! case 0: // Success!
if (urb->actual_length > 0) { if (urb->actual_length > 0) {
dev_info(&dev->interface->dev, dev_info(&dev->interface->dev,
"ch349: Received %d bytes\n", "ch397: Received %d bytes\n",
urb->actual_length); urb->actual_length);
ch349_hexdump(&dev->interface->dev, "RX", ch397_hexdump(&dev->interface->dev, "RX",
urb->transfer_buffer, urb->actual_length); urb->transfer_buffer, urb->actual_length);
// Créer un sk_buff et passer au network stack // Créer un sk_buff et passer au network stack
@@ -126,10 +127,10 @@ static void ch349_read_callback(struct urb *urb)
netdev->stats.rx_bytes += urb->actual_length; netdev->stats.rx_bytes += urb->actual_length;
printk(KERN_INFO printk(KERN_INFO
"ch349: Packet passed to network stack\n"); "ch397: Packet passed to network stack\n");
} else { } else {
netdev->stats.rx_dropped++; netdev->stats.rx_dropped++;
printk(KERN_ERR "ch349: Cannot allocate skb\n"); printk(KERN_ERR "ch397: Cannot allocate skb\n");
} }
} }
break; break;
@@ -155,7 +156,7 @@ static void ch349_read_callback(struct urb *urb)
} }
// Fonction pour démarrer la lecture // Fonction pour démarrer la lecture
static int ch349_start_rx(struct ch349_device *dev) static int ch397_start_rx(struct ch397_device *dev)
{ {
struct urb *urb; struct urb *urb;
int retval; int retval;
@@ -173,7 +174,7 @@ static int ch349_start_rx(struct ch349_device *dev)
usb_fill_bulk_urb(urb, dev->udev, usb_fill_bulk_urb(urb, dev->udev,
usb_rcvbulkpipe(dev->udev, dev->bulk_in_endpointAddr), usb_rcvbulkpipe(dev->udev, dev->bulk_in_endpointAddr),
dev->bulk_in_buffer, dev->bulk_in_size, dev->bulk_in_buffer, dev->bulk_in_size,
ch349_read_callback, dev); ch397_read_callback, dev);
// Sauvegarder l'URB dans la structure // Sauvegarder l'URB dans la structure
dev->rx_urb = urb; dev->rx_urb = urb;
@@ -193,7 +194,7 @@ static int ch349_start_rx(struct ch349_device *dev)
} }
// Fonction pour arrêter la lecture // Fonction pour arrêter la lecture
static void ch349_stop_rx(struct ch349_device *dev) static void ch397_stop_rx(struct ch397_device *dev)
{ {
if (dev->rx_urb) { if (dev->rx_urb) {
usb_kill_urb(dev->rx_urb); usb_kill_urb(dev->rx_urb);
@@ -202,14 +203,14 @@ static void ch349_stop_rx(struct ch349_device *dev)
} }
} }
static int ch349_net_open(struct net_device *netdev) static int ch397_net_open(struct net_device *netdev)
{ {
struct ch349_device *dev = netdev_priv(netdev); struct ch397_device *dev = netdev_priv(netdev);
int retval; int retval;
printk(KERN_INFO "ch349: Interface UP\n"); printk(KERN_INFO "ch397: Interface UP\n");
retval = ch349_start_rx(dev); retval = ch397_start_rx(dev);
if (retval) if (retval)
return retval; return retval;
@@ -218,20 +219,22 @@ static int ch349_net_open(struct net_device *netdev)
return 0; return 0;
} }
static int ch349_net_stop(struct net_device *netdev) static int ch397_net_stop(struct net_device *netdev)
{ {
struct ch349_device *dev = netdev_priv(netdev); struct ch397_device *dev = netdev_priv(netdev);
printk(KERN_INFO "ch349: Interface DOWN\n"); printk(KERN_INFO "ch397: Interface DOWN\n");
netif_stop_queue(netdev); netif_stop_queue(netdev);
netif_carrier_off(netdev); netif_carrier_off(netdev);
ch349_stop_rx(dev); ch397_stop_rx(dev);
netif_carrier_off(netdev);
return 0; return 0;
} }
static void ch349_write_callback(struct urb *urb) static void ch397_write_callback(struct urb *urb)
{ {
struct sk_buff *skb = urb->context; struct sk_buff *skb = urb->context;
struct net_device *netdev = skb->dev; struct net_device *netdev = skb->dev;
@@ -249,10 +252,10 @@ static void ch349_write_callback(struct urb *urb)
usb_free_urb(urb); usb_free_urb(urb);
} }
static netdev_tx_t ch349_start_xmit(struct sk_buff *skb, static netdev_tx_t ch397_start_xmit(struct sk_buff *skb,
struct net_device *netdev) struct net_device *netdev)
{ {
struct ch349_device *dev = netdev_priv(netdev); struct ch397_device *dev = netdev_priv(netdev);
struct urb *urb; struct urb *urb;
int retval; int retval;
@@ -266,14 +269,15 @@ static netdev_tx_t ch349_start_xmit(struct sk_buff *skb,
// Préparer l'URB (Bulk OUT) // Préparer l'URB (Bulk OUT)
usb_fill_bulk_urb(urb, dev->udev, usb_fill_bulk_urb(urb, dev->udev,
usb_sndbulkpipe(dev->udev, dev->bulk_out_endpointAddr), usb_sndbulkpipe(dev->udev,
skb->data, skb->len, dev->bulk_out_endpointAddr),
ch349_write_callback, skb); skb->data, skb->len, ch397_write_callback, skb);
// Soumettre l'URB // Soumettre l'URB
retval = usb_submit_urb(urb, GFP_ATOMIC); retval = usb_submit_urb(urb, GFP_ATOMIC);
if (retval) { if (retval) {
dev_err(&dev->interface->dev, "Failed to submit TX URB: %d\n", retval); dev_err(&dev->interface->dev, "Failed to submit TX URB: %d\n",
retval);
usb_free_urb(urb); usb_free_urb(urb);
dev_kfree_skb(skb); dev_kfree_skb(skb);
netdev->stats.tx_errors++; netdev->stats.tx_errors++;
@@ -285,19 +289,18 @@ static netdev_tx_t ch349_start_xmit(struct sk_buff *skb,
return NETDEV_TX_OK; return NETDEV_TX_OK;
} }
static const struct net_device_ops ch349_netdev_ops = { static const struct net_device_ops ch397_netdev_ops = {
.ndo_open = ch349_net_open, .ndo_open = ch397_net_open,
.ndo_stop = ch349_net_stop, .ndo_stop = ch397_net_stop,
.ndo_start_xmit = ch349_start_xmit, .ndo_start_xmit = ch397_start_xmit,
.ndo_validate_addr = eth_validate_addr, .ndo_validate_addr = eth_validate_addr,
.ndo_set_mac_address = eth_mac_addr, .ndo_set_mac_address = eth_mac_addr,
}; };
static int ch397_probe(struct usb_interface *interface,
static int ch349_probe(struct usb_interface *interface,
const struct usb_device_id *id) const struct usb_device_id *id)
{ {
struct ch349_device *dev; struct ch397_device *dev;
struct net_device *netdev; struct net_device *netdev;
struct usb_endpoint_descriptor *endpoint; struct usb_endpoint_descriptor *endpoint;
u8 mac[ETH_ALEN]; u8 mac[ETH_ALEN];
@@ -307,10 +310,10 @@ static int ch349_probe(struct usb_interface *interface,
int config_val = udev->actconfig->desc.bConfigurationValue; int config_val = udev->actconfig->desc.bConfigurationValue;
int intf_num = interface->cur_altsetting->desc.bInterfaceNumber; int intf_num = interface->cur_altsetting->desc.bInterfaceNumber;
dev_info(&interface->dev, dev_info(&interface->dev,
"Probing CH349 device (config %d, interface %d)\n",
config_val, intf_num); "Probing CH397 device (config %d, interface %d)\n", config_val,
intf_num);
/* /*
* This device exposes 3 USB configurations: * This device exposes 3 USB configurations:
@@ -337,7 +340,7 @@ static int ch349_probe(struct usb_interface *interface,
} }
// Allouer net_device + notre structure // Allouer net_device + notre structure
netdev = alloc_etherdev(sizeof(struct ch349_device)); netdev = alloc_etherdev(sizeof(struct ch397_device));
if (!netdev) { if (!netdev) {
dev_err(&interface->dev, "Cannot allocate netdev\n"); dev_err(&interface->dev, "Cannot allocate netdev\n");
return -ENOMEM; return -ENOMEM;
@@ -363,9 +366,7 @@ static int ch349_probe(struct usb_interface *interface,
} }
dev_info(&interface->dev, "Interface %d obtained (altsetting %d)\n", dev_info(&interface->dev, "Interface %d obtained (altsetting %d)\n",
intf_num, intf_num, interface->cur_altsetting->desc.bAlternateSetting);
interface->cur_altsetting->desc.bAlternateSetting);
for (i = 0; i < interface->cur_altsetting->desc.bNumEndpoints; i++) { for (i = 0; i < interface->cur_altsetting->desc.bNumEndpoints; i++) {
endpoint = &interface->cur_altsetting->endpoint[i].desc; endpoint = &interface->cur_altsetting->endpoint[i].desc;
@@ -406,11 +407,11 @@ static int ch349_probe(struct usb_interface *interface,
} }
// Récupère la MAC // Récupère la MAC
ch349_get_mac_address(dev, mac); ch397_get_mac_address(dev, mac);
eth_hw_addr_set(netdev, mac); eth_hw_addr_set(netdev, mac);
// Configure net_device // Configure net_device
netdev->netdev_ops = &ch349_netdev_ops; netdev->netdev_ops = &ch397_netdev_ops;
netdev->watchdog_timeo = 5 * HZ; netdev->watchdog_timeo = 5 * HZ;
usb_set_intfdata(interface, dev); usb_set_intfdata(interface, dev);
@@ -425,12 +426,10 @@ static int ch349_probe(struct usb_interface *interface,
netif_carrier_off(netdev); netif_carrier_off(netdev);
dev_info(&interface->dev, "CH349 attached as %s (MAC: %pM)\n", dev_info(&interface->dev, "CH397 attached as %s (MAC: %pM)\n",
netdev->name, mac); netdev->name, mac);
//retval = ch349_start_rx(dev); netif_carrier_off(netdev);
//if (retval)
// goto error;
return 0; return 0;
@@ -444,9 +443,9 @@ error:
return retval; return retval;
} }
static void ch349_disconnect(struct usb_interface *interface) static void ch397_disconnect(struct usb_interface *interface)
{ {
struct ch349_device *dev; struct ch397_device *dev;
struct net_device *netdev; struct net_device *netdev;
dev = usb_get_intfdata(interface); dev = usb_get_intfdata(interface);
@@ -457,18 +456,18 @@ static void ch349_disconnect(struct usb_interface *interface)
usb_set_intfdata(interface, NULL); usb_set_intfdata(interface, NULL);
unregister_netdev(netdev); unregister_netdev(netdev);
ch349_stop_rx(dev); ch397_stop_rx(dev);
kfree(dev->bulk_in_buffer); kfree(dev->bulk_in_buffer);
usb_put_dev(dev->udev); usb_put_dev(dev->udev);
free_netdev(netdev); free_netdev(netdev);
dev_info(&interface->dev, "CH349 device now disconnected\n"); dev_info(&interface->dev, "CH397 device now disconnected\n");
} }
static int ch349_suspend(struct usb_interface *intf, pm_message_t message) static int ch397_suspend(struct usb_interface *intf, pm_message_t message)
{ {
struct ch349_device *dev = usb_get_intfdata(intf); struct ch397_device *dev = usb_get_intfdata(intf);
if (!dev) if (!dev)
return 0; return 0;
@@ -479,9 +478,9 @@ static int ch349_suspend(struct usb_interface *intf, pm_message_t message)
return 0; return 0;
} }
static int ch349_resume(struct usb_interface *intf) static int ch397_resume(struct usb_interface *intf)
{ {
struct ch349_device *dev = usb_get_intfdata(intf); struct ch397_device *dev = usb_get_intfdata(intf);
if (!dev) if (!dev)
return 0; return 0;
@@ -489,18 +488,18 @@ static int ch349_resume(struct usb_interface *intf)
return 0; return 0;
} }
static struct usb_driver ch349_driver = { static struct usb_driver ch397_driver = {
.name = "ch349", .name = "ch397",
.probe = ch349_probe, .probe = ch397_probe,
.disconnect = ch349_disconnect, .disconnect = ch397_disconnect,
.suspend = ch349_suspend, .suspend = ch397_suspend,
.resume = ch349_resume, .resume = ch397_resume,
.id_table = ch349_table, .id_table = ch397_table,
.supports_autosuspend = 1, .supports_autosuspend = 1,
}; };
module_usb_driver(ch349_driver); module_usb_driver(ch397_driver);
MODULE_AUTHOR("bob industries"); MODULE_AUTHOR("bob industries");
MODULE_DESCRIPTION("Driver USB pour CH349A"); MODULE_DESCRIPTION("Driver USB pour CH397A");
MODULE_LICENSE("GPL"); MODULE_LICENSE("GPL");