etc

~ scripts and random things
git clone https://github.com/djnnvx/etc.git
usbip_fuzz.h (3551B)
      1 #pragma once
      2 /*
      3  * usbip_fuzz.h — fuzz control header, included before any usbip source.
      4  *
      5  * Provides:
      6  *   - global fuzz buffer (populated by harness main, consumed by __wrap_recv)
      7  *   - logging macro stubs so usbip source compiles without a real logging lib
      8  *   - usbip_header wire-format structs for fuzz_urb (not in userspace headers)
      9  *
     10  * Protocol constants (USBIP_VERSION, OP_*, SYSFS_BUS_ID_SIZE, etc.) are NOT
     11  * defined here — they come from usbip_common.h / usbip_network.h / config.h.
     12  */
     13 
     14 #include <stddef.h>
     15 #include <stdint.h>
     16 #include <string.h>
     17 #include <stdio.h>
     18 
     19 /* ── fuzz buffer (defined in mock_syscalls.c, declared here) ──────── */
     20 #define FUZZ_BUF_MAX (1 << 16)  /* 64 KB */
     21 
     22 extern uint8_t  g_fuzz_buf[FUZZ_BUF_MAX];
     23 extern size_t   g_fuzz_len;
     24 extern size_t   g_fuzz_offset;
     25 
     26 static inline void fuzz_reset(const uint8_t *data, size_t size) {
     27     size_t n = size < FUZZ_BUF_MAX ? size : FUZZ_BUF_MAX;
     28     memcpy(g_fuzz_buf, data, n);
     29     g_fuzz_len    = n;
     30     g_fuzz_offset = 0;
     31 }
     32 
     33 /* ── silence usbip logging ────────────────────────────────────────── */
     34 #ifndef pr_err
     35 # define pr_err(fmt, ...)   do { } while (0)
     36 #endif
     37 #ifndef pr_warn
     38 # define pr_warn(fmt, ...)  do { } while (0)
     39 #endif
     40 #ifndef pr_info
     41 # define pr_info(fmt, ...)  do { } while (0)
     42 #endif
     43 #ifndef pr_debug
     44 # define pr_debug(fmt, ...) do { } while (0)
     45 #endif
     46 
     47 /* usbip uses these debug wrappers over pr_debug */
     48 #ifndef dbg
     49 # define dbg(fmt, ...)               do { } while (0)
     50 #endif
     51 #ifndef usbip_dbg_xmit
     52 # define usbip_dbg_xmit(fmt, ...)    do { } while (0)
     53 #endif
     54 #ifndef usbip_dbg_sysfs
     55 # define usbip_dbg_sysfs(fmt, ...)   do { } while (0)
     56 #endif
     57 #ifndef usbip_dbg_urb
     58 # define usbip_dbg_urb(fmt, ...)     do { } while (0)
     59 #endif
     60 
     61 /*
     62  * usbip_debug_flag — extern referenced by logging macros in usbip_common.h.
     63  */
     64 extern unsigned long usbip_debug_flag;
     65 
     66 /*
     67  * ── USB/IP URB PDU wire-format constants and structs ──────────────────
     68  * struct usbip_header lives only in the kernel's internal headers, not in
     69  * any userspace UAPI. Define the wire layout here for fuzz_urb.c so it
     70  * can call usbip_net_recv() and inspect the PDU fields.
     71  *
     72  * Matches drivers/usb/usbip/usbip_common.h — do not change field order.
     73  */
     74 #define USBIP_CMD_SUBMIT    0x00000001
     75 #define USBIP_CMD_UNLINK    0x00000002
     76 #define USBIP_RET_SUBMIT    0x00000003
     77 #define USBIP_RET_UNLINK    0x00000004
     78 
     79 /* PDU header is 48 bytes on the wire (20-byte basic + 28-byte union) */
     80 #define USBIP_PDU_HDR_SIZE  48
     81 
     82 struct usbip_header_basic {
     83     uint32_t command;
     84     uint32_t seqnum;
     85     uint32_t devid;
     86     uint32_t direction;
     87     uint32_t ep;
     88 };
     89 
     90 struct usbip_header_cmd_submit {
     91     uint32_t transfer_flags;
     92     int32_t  transfer_buffer_length;
     93     int32_t  start_frame;
     94     int32_t  number_of_packets;
     95     int32_t  interval;
     96     uint8_t  setup[8];
     97 };
     98 
     99 struct usbip_header_ret_submit {
    100     int32_t  status;
    101     int32_t  actual_length;
    102     int32_t  start_frame;
    103     int32_t  number_of_packets;
    104     int32_t  error_count;
    105 };
    106 
    107 struct usbip_header_cmd_unlink { uint32_t seqnum; };
    108 struct usbip_header_ret_unlink { int32_t  status; };
    109 
    110 struct usbip_header {
    111     struct usbip_header_basic base;
    112     union {
    113         struct usbip_header_cmd_submit  cmd_submit;
    114         struct usbip_header_ret_submit  ret_submit;
    115         struct usbip_header_cmd_unlink  cmd_unlink;
    116         struct usbip_header_ret_unlink  ret_unlink;
    117     } u;
    118 };