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 enum {
  30         sock_rmem_max = 0,
  31         sock_rmem_def,
  32         sock_wmem_max,
  33         sock_wmem_def,
  34 };
  35
  36 #define SMEM_SUG_MAX    104857600
  37 #define SMEM_SUG_DEF    4194304
  38
  39 extern int af_socket(int af);
  40 extern int pf_socket(void);
  41 extern int adjust_dbm_level(int in_dbm, int dbm_val);
  42 extern int wireless_sigqual(const char *ifname, struct iw_statistics *stats);
  43 extern int wireless_rangemax_sigqual(const char *ifname);
  44 extern u32 wireless_bitrate(const char *ifname);
  45 extern u32 ethtool_bitrate(const char *ifname);
  46 extern u32 device_bitrate(const char *ifname);
  47 extern int ethtool_drvinf(const char *ifname, struct ethtool_drvinfo *drvinf);
  48 extern int ethtool_link(const char *ifname);
  49 extern int device_mtu(const char *ifname);
  50 extern int device_address(const char *ifname, int af,
  51                           struct sockaddr_storage *ss);
  52 extern int device_irq_number(const char *ifname);
  53 extern int device_bind_irq_to_cpu(int irq, int cpu);
  54 extern void sock_print_net_stats(int sock, unsigned long skipped);
  55 extern int device_ifindex(const char *ifname);
  56 extern short device_get_flags(const char *ifname);
  57 extern void device_set_flags(const char *ifname, const short flags);
  58 extern int set_nonblocking(int fd);
  59 extern int set_nonblocking_sloppy(int fd);
  60 extern int set_reuseaddr(int fd);
  61 extern void set_sock_prio(int fd, int prio);
  62 extern void set_tcp_cork(int fd);
  63 extern void set_tcp_uncork(int fd);
  64 extern void set_udp_cork(int fd);
  65 extern void set_udp_uncork(int fd);
  66 extern void set_sock_cork(int fd, int udp);
  67 extern void set_sock_uncork(int fd, int udp);
  68 extern void set_tcp_nodelay(int fd);
  69 extern void set_socket_keepalive(int fd);
  70 extern int set_ipv6_only(int fd);
  71 extern void set_mtu_disc_dont(int fd);
  72 extern int get_system_socket_mem(int which);
  73 extern void set_system_socket_mem(int which, int val);
  74 extern void register_signal(int signal, void (*handler)(int));
  75 extern void register_signal_f(int signal, void (*handler)(int), int flags);
  76 extern int get_tty_size(void);
  77 extern short enter_promiscuous_mode(char *ifname);
  78 extern void leave_promiscuous_mode(char *ifname, short oldflags);
  79 extern int device_up(char *ifname);
  80 extern int device_running(char *ifname);
  81 extern int device_up_and_running(char *ifname);
  82 extern int poll_error_maybe_die(int sock, struct pollfd *pfd);
  83 extern void set_epoll_descriptor(int fd_epoll, int action,
  84                                  int fd_toadd, int events);
  85 extern int set_epoll_descriptor2(int fd_epoll, int action,
  86                                  int fd_toadd, int events);
  87 extern int set_cpu_affinity(char *str, int inverted);
  88 extern int set_proc_prio(int prio);
  89 extern int set_sched_status(int policy, int priority);
  90 extern void ioprio_print(void);
  91 extern void set_ioprio_rt(void);
  92 extern void set_ioprio_be(void);
  93 extern void xusleep(const struct timespec *ts_delay);
  94 extern void xusleep2(long usecs);
  95 extern int xnanosleep(double seconds);
  96 extern int set_timeout(struct timeval *timeval, unsigned int msec);
  97 extern size_t strlcpy(char *dest, const char *src, size_t size);
  98 extern int slprintf(char *dst, size_t size, const char *fmt, ...);
  99 extern noinline void *xmemset(void *s, int c, size_t n);
 100 extern char *getuint(char *in, uint32_t *out);
 101 extern char *strtrim_right(register char *p, register char c);
 102 extern char *strtrim_left(register char *p, register char c);
 103
 104 static inline int get_default_sched_policy(void)
 105 {
 106         return SCHED_FIFO;
 107 }
 108
 109 static inline int get_default_sched_prio(void)
 110 {
 111         return sched_get_priority_max(get_default_sched_policy());
 112 }
 113
 114 static inline int get_number_cpus(void)
 115 {
 116         return sysconf(_SC_NPROCESSORS_CONF);
 117 }
 118
 119 static inline int get_number_cpus_online(void)
 120 {
 121         return sysconf(_SC_NPROCESSORS_ONLN);
 122 }
 123
 124 static inline int get_default_proc_prio(void)
 125 {
 126         return -20;
 127 }
 128
 129 static inline struct timeval tv_subtract(struct timeval time1,
 130                                          struct timeval time2)
 131 {
 132         /* time1 - time2 */
 133         struct timeval result;
 134
 135         if ((time1.tv_sec < time2.tv_sec) || ((time1.tv_sec == time2.tv_sec) &&
 136             (time1.tv_usec <= time2.tv_usec))) {
 137                 result.tv_sec = result.tv_usec = 0;
 138         } else {
 139                 result.tv_sec = time1.tv_sec - time2.tv_sec;
 140                 if (time1.tv_usec < time2.tv_usec) {
 141                         result.tv_usec = time1.tv_usec + 1000000L -
 142                                          time2.tv_usec;
 143                         result.tv_sec--;
 144                 } else {
 145                         result.tv_usec = time1.tv_usec - time2.tv_usec;
 146                 }
 147         }
 148
 149         return result;
 150 }
 151
 152 static inline char *skips(char *p)
 153 {
 154         return strtrim_left(p, ' ');
 155 }
 156
 157 static inline char *skipchar(char *in, char c)
 158 {
 159         if (*in != c)
 160                 panic("Syntax error!\n");
 161         return ++in;
 162 }
 163
 164 #endif /* XSYS_H */