granicus.if.org Git - strace/blob - netlink_kobject_uevent.c

   1 /*
   2  * Copyright (c) 2018 Harsha Sharma <harshasharmaiitr@gmail.com>
   3  * Copyright (c) 2018 The strace developers.
   4  * All rights reserved.
   5  *
   6  * SPDX-License-Identifier: LGPL-2.1-or-later
   7  */
   8
   9 #include "defs.h"
  10 #include "print_fields.h"
  11 #include "netlink_kobject_uevent.h"
  12
  13 #include <arpa/inet.h>
  14
  15 void
  16 decode_netlink_kobject_uevent(struct tcb *tcp, kernel_ulong_t addr,
  17                               kernel_ulong_t len)
  18 {
  19         struct udev_monitor_netlink_header uh;
  20         const char *prefix = "libudev";
  21         unsigned int offset = sizeof(uh);
  22
  23         if (!verbose(tcp) || (exiting(tcp) && syserror(tcp)) ||
  24             !addr || len < offset || umove(tcp, addr, &uh) ||
  25             strcmp(uh.prefix, prefix) != 0) {
  26                 printstrn(tcp, addr, len);
  27                 return;
  28         }
  29
  30         PRINT_FIELD_CSTRING("{{", uh, prefix);
  31         tprintf(", magic=htonl(%#x)", ntohl(uh.magic));
  32         PRINT_FIELD_U(", ", uh, header_size);
  33         PRINT_FIELD_U(", ", uh, properties_off);
  34         PRINT_FIELD_U(", ", uh, properties_len);
  35         tprintf(", filter_subsystem_hash=htonl(%#x)", ntohl(uh.filter_subsystem_hash));
  36         tprintf(", filter_devtype_hash=htonl(%#x)", ntohl(uh.filter_devtype_hash));
  37         tprintf(", filter_tag_bloom_hi=htonl(%#x)", ntohl(uh.filter_tag_bloom_hi));
  38         tprintf(", filter_tag_bloom_lo=htonl(%#x)", ntohl(uh.filter_tag_bloom_lo));
  39         tprints("}");
  40         if (len > offset) {
  41                 tprints(", ");
  42                 printstrn(tcp, addr + offset, len - offset);
  43         }
  44         tprints("}");
  45 }