src/xutils.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 <stdint.h>
  15 #include <sys/socket.h>
  16 #include <unistd.h>
  17 #include <linux/ethtool.h>
  18 #include <linux/if.h>
  19 #include <linux/wireless.h>
  20 #include <poll.h>
  21 #include <sys/poll.h>
  22 #include <sched.h>
  23 #include <sys/resource.h>
  24 #include <sys/time.h>
  25
  26 #include "die.h"
  27 #include "built_in.h"
  28
  29 extern int af_socket(int af);
  30 extern int pf_socket(void);
  31 extern int wireless_bitrate(const char *ifname);
  32 extern int adjust_dbm_level(int in_dbm, int dbm_val);
  33 extern int wireless_sigqual(const char *ifname, struct iw_statistics *stats);
  34 extern int wireless_rangemax_sigqual(const char *ifname);
  35 extern int ethtool_bitrate(const char *ifname);
  36 extern int ethtool_drvinf(const char *ifname, struct ethtool_drvinfo *drvinf);
  37 extern int device_bitrate(const char *ifname);
  38 extern int device_mtu(const char *ifname);
  39 extern int device_address(const char *ifname, int af,
  40                           struct sockaddr_storage *ss);
  41 extern int device_irq_number(const char *ifname);
  42 extern int device_bind_irq_to_cpu(int irq, int cpu);
  43 extern void sock_print_net_stats(int sock, unsigned long skipped);
  44 extern int device_ifindex(const char *ifname);
  45 extern short device_get_flags(const char *ifname);
  46 extern void device_set_flags(const char *ifname, const short flags);
  47 extern int set_nonblocking(int fd);
  48 extern int set_nonblocking_sloppy(int fd);
  49 extern int set_reuseaddr(int fd);
  50 extern void set_tcp_cork(int fd);
  51 extern void set_tcp_uncork(int fd);
  52 extern void set_udp_cork(int fd);
  53 extern void set_udp_uncork(int fd);
  54 extern void set_sock_cork(int fd, int udp);
  55 extern void set_sock_uncork(int fd, int udp);
  56 extern void set_tcp_nodelay(int fd);
  57 extern void set_socket_keepalive(int fd);
  58 extern int set_ipv6_only(int fd);
  59 extern void set_mtu_disc_dont(int fd);
  60 extern void register_signal(int signal, void (*handler)(int));
  61 extern void register_signal_f(int signal, void (*handler)(int), int flags);
  62 extern int get_tty_size(void);
  63 extern void check_for_root_maybe_die(void);
  64 extern short enter_promiscuous_mode(char *ifname);
  65 extern void leave_promiscuous_mode(char *ifname, short oldflags);
  66 extern int device_up(char *ifname);
  67 extern int device_running(char *ifname);
  68 extern int device_up_and_running(char *ifname);
  69 extern int poll_error_maybe_die(int sock, struct pollfd *pfd);
  70 extern void set_epoll_descriptor(int fd_epoll, int action,
  71                                  int fd_toadd, int events);
  72 extern int set_epoll_descriptor2(int fd_epoll, int action,
  73                                  int fd_toadd, int events);
  74 extern int set_cpu_affinity(char *str, int inverted);
  75 extern int set_proc_prio(int prio);
  76 extern int set_sched_status(int policy, int priority);
  77 extern void ioprio_print(void);
  78 extern void set_ioprio_rt(void);
  79 extern void set_ioprio_be(void);
  80 extern void xusleep(const struct timespec *ts_delay);
  81 extern void xusleep2(long usecs);
  82 extern int xnanosleep(double seconds);
  83 extern int set_timeout(struct timeval *timeval, unsigned int msec);
  84 extern size_t strlcpy(char *dest, const char *src, size_t size);
  85 extern int slprintf(char *dst, size_t size, const char *fmt, ...);
  86 extern noinline void *xmemset(void *s, int c, size_t n);
  87 extern char *getuint(char *in, uint32_t *out);
  88 extern char *strtrim_right(register char *p, register char c);
  89 extern char *strtrim_left(register char *p, register char c);
  90
  91 static inline int get_default_sched_policy(void)
  92 {
  93         return SCHED_FIFO;
  94 }
  95
  96 static inline int get_default_sched_prio(void)
  97 {
  98         return sched_get_priority_max(get_default_sched_policy());
  99 }
 100
 101 static inline int get_number_cpus(void)
 102 {
 103         return sysconf(_SC_NPROCESSORS_CONF);
 104 }
 105
 106 static inline int get_number_cpus_online(void)
 107 {
 108         return sysconf(_SC_NPROCESSORS_ONLN);
 109 }
 110
 111 static inline int get_default_proc_prio(void)
 112 {
 113         return -20;
 114 }
 115
 116 static inline struct timeval tv_subtract(struct timeval time1,
 117                                          struct timeval time2)
 118 {
 119         /* time1 - time2 */
 120         struct timeval result;
 121
 122         if ((time1.tv_sec < time2.tv_sec) || ((time1.tv_sec == time2.tv_sec) &&
 123             (time1.tv_usec <= time2.tv_usec))) {
 124                 result.tv_sec = result.tv_usec = 0;
 125         } else {
 126                 result.tv_sec = time1.tv_sec - time2.tv_sec;
 127                 if (time1.tv_usec < time2.tv_usec) {
 128                         result.tv_usec = time1.tv_usec + 1000000L -
 129                                          time2.tv_usec;
 130                         result.tv_sec--;
 131                 } else {
 132                         result.tv_usec = time1.tv_usec - time2.tv_usec;
 133                 }
 134         }
 135
 136         return result;
 137 }
 138
 139 static inline char *skips(char *p)
 140 {
 141         return strtrim_left(p, ' ');
 142 }
 143
 144 static inline char *skipchar(char *in, char c)
 145 {
 146         if (*in != c)
 147                 panic("Syntax error!\n");
 148         return ++in;
 149 }
 150
 151 #endif /* XSYS_H */