src/xsys.h

   1 /*
   2  * netsniff-ng - the packet sniffing beast
   3  * By Daniel Borkmann <daniel@netsniff-ng.org>
   4  * Copyright 2009, 2010 Daniel Borkmann.
   5  * Copyright 2009, 2010 Emmanuel Roullit.
   6  * Subject to the GPL, version 2.
   7  */
   8
   9 #ifndef XSYS_H
  10 #define XSYS_H
  11
  12 #define _GNU_SOURCE
  13 #include <errno.h>
  14 #include <sys/socket.h>
  15 #include <unistd.h>
  16 #include <linux/ethtool.h>
  17 #include <linux/if.h>
  18 #include <linux/wireless.h>
  19 #include <poll.h>
  20 #include <sys/poll.h>
  21 #include <sched.h>
  22 #include <sys/resource.h>
  23 #include <sys/time.h>
  24
  25 extern int af_socket(int af);
  26 extern int pf_socket(void);
  27 extern int wireless_bitrate(const char *ifname);
  28 extern int adjust_dbm_level(int in_dbm, int dbm_val);
  29 extern int wireless_sigqual(const char *ifname, struct iw_statistics *stats);
  30 extern int wireless_rangemax_sigqual(const char *ifname);
  31 extern int ethtool_bitrate(const char *ifname);
  32 extern int ethtool_drvinf(const char *ifname, struct ethtool_drvinfo *drvinf);
  33 extern int device_bitrate(const char *ifname);
  34 extern int device_mtu(const char *ifname);
  35 extern int device_address(const char *ifname, int af,
  36                           struct sockaddr_storage *ss);
  37 extern int device_irq_number(const char *ifname);
  38 extern int device_bind_irq_to_cpu(int irq, int cpu);
  39 extern void sock_print_net_stats(int sock, unsigned long skipped);
  40 extern int device_ifindex(const char *ifname);
  41 extern short device_get_flags(const char *ifname);
  42 extern void device_set_flags(const char *ifname, const short flags);
  43 extern int set_nonblocking(int fd);
  44 extern int set_nonblocking_sloppy(int fd);
  45 extern int set_reuseaddr(int fd);
  46 extern void set_tcp_cork(int fd);
  47 extern void set_tcp_uncork(int fd);
  48 extern void set_udp_cork(int fd);
  49 extern void set_udp_uncork(int fd);
  50 extern void set_sock_cork(int fd, int udp);
  51 extern void set_sock_uncork(int fd, int udp);
  52 extern void set_tcp_nodelay(int fd);
  53 extern void set_socket_keepalive(int fd);
  54 extern int set_ipv6_only(int fd);
  55 extern void set_mtu_disc_dont(int fd);
  56 extern void register_signal(int signal, void (*handler)(int));
  57 extern void register_signal_f(int signal, void (*handler)(int), int flags);
  58 extern int get_tty_size(void);
  59 extern void check_for_root_maybe_die(void);
  60 extern short enter_promiscuous_mode(char *ifname);
  61 extern void leave_promiscuous_mode(char *ifname, short oldflags);
  62 extern int device_up(char *ifname);
  63 extern int device_running(char *ifname);
  64 extern int device_up_and_running(char *ifname);
  65 extern int poll_error_maybe_die(int sock, struct pollfd *pfd);
  66 extern void set_epoll_descriptor(int fd_epoll, int action,
  67                                  int fd_toadd, int events);
  68 extern int set_epoll_descriptor2(int fd_epoll, int action,
  69                                  int fd_toadd, int events);
  70 extern int set_cpu_affinity(char *str, int inverted);
  71 extern int set_proc_prio(int prio);
  72 extern int set_sched_status(int policy, int priority);
  73 extern void ioprio_print(void);
  74 extern void set_ioprio_rt(void);
  75 extern void set_ioprio_be(void);
  76 extern void xusleep(const struct timespec *ts_delay);
  77 extern void xusleep2(long usecs);
  78 extern int xnanosleep(double seconds);
  79 extern int set_timeout(struct timeval *timeval, unsigned int msec);
  80
  81 static inline int get_default_sched_policy(void)
  82 {
  83         return SCHED_FIFO;
  84 }
  85
  86 static inline int get_default_sched_prio(void)
  87 {
  88         return sched_get_priority_max(get_default_sched_policy());
  89 }
  90
  91 static inline int get_number_cpus(void)
  92 {
  93         return sysconf(_SC_NPROCESSORS_CONF);
  94 }
  95
  96 static inline int get_number_cpus_online(void)
  97 {
  98         return sysconf(_SC_NPROCESSORS_ONLN);
  99 }
 100
 101 static inline int get_default_proc_prio(void)
 102 {
 103         return -20;
 104 }
 105
 106 static inline struct timeval tv_subtract(struct timeval time1,
 107                                          struct timeval time2)
 108 {
 109         /* time1 - time2 */
 110         struct timeval result;
 111
 112         if ((time1.tv_sec < time2.tv_sec) || ((time1.tv_sec == time2.tv_sec) &&
 113             (time1.tv_usec <= time2.tv_usec))) {
 114                 result.tv_sec = result.tv_usec = 0;
 115         } else {
 116                 result.tv_sec = time1.tv_sec - time2.tv_sec;
 117                 if (time1.tv_usec < time2.tv_usec) {
 118                         result.tv_usec = time1.tv_usec + 1000000L -
 119                                          time2.tv_usec;
 120                         result.tv_sec--;
 121                 } else {
 122                         result.tv_usec = time1.tv_usec - time2.tv_usec;
 123                 }
 124         }
 125
 126         return result;
 127 }
 128
 129 #endif /* XSYS_H */