dtv-scan-tables.git - Digital TV scan tables

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Diffstat (limited to 'isdb-t/br-sp-Tapirai')

0 files changed, 0 insertions, 0 deletions

/* * General-purpose utilities used by multiple files. */ #include "wavemon.h" #include "nl80211.h" #include <arpa/inet.h> #include <netinet/in.h> #include <netinet/ether.h> #include <net/if_arp.h> #include <net/ethernet.h> #include <sys/socket.h> #include <linux/if.h> /* Maximum length of a MAC address: 2 * 6 hex digits, 6 - 1 colons, plus '\0' */ #define MAC_ADDR_MAX 18 /* Return true if all ethernet octets are zero. */ bool ether_addr_is_zero(const struct ether_addr *ea) { static const struct ether_addr zero = {{0}}; return memcmp(ea, &zero, sizeof(zero)) == 0; } /* Print a mac-address, include leading zeroes (unlike ether_ntoa(3)) */ char *ether_addr(const struct ether_addr *ea) { static char mac[MAC_ADDR_MAX]; char *d = mac, *a = ether_ntoa(ea); next_chunk: if (a[0] == '\0' || a[1] == '\0' || a[1] == ':') *d++ = '0'; while ((*d++ = conf.cisco_mac ? (*a == ':' ? '.' : *a) : toupper(*a))) if (*a++ == ':') goto next_chunk; return mac; } /* Print mac-address translation from /etc/ethers if available */ char *ether_lookup(const struct ether_addr *ea) { static char hostname[BUFSIZ]; if (ether_ntohost(hostname, ea) == 0) return hostname; return ether_addr(ea); } /* Format an Ethernet mac address */ char *mac_addr(const struct sockaddr *sa) { if (sa->sa_family != ARPHRD_ETHER) return "00:00:00:00:00:00"; return ether_lookup((const struct ether_addr *)sa->sa_data); } /* Format a (I)BSSID */ char *format_bssid(const struct sockaddr *ap) { uint8_t bcast_addr[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; uint8_t zero_addr[ETH_ALEN] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; if (memcmp(ap->sa_data, zero_addr, ETH_ALEN) == 0) return "Not-Associated"; if (memcmp(ap->sa_data, bcast_addr, ETH_ALEN) == 0) return "Invalid"; return mac_addr(ap); } /* count bits set in @mask the Brian Kernighan way */ uint8_t bit_count(uint32_t mask) { uint8_t bits_set; for (bits_set = 0; mask; bits_set++) mask &= mask - 1; return bits_set; } /* netmask = contiguous 1's followed by contiguous 0's */ uint8_t prefix_len(const struct in_addr *netmask) { return bit_count(netmask->s_addr); } /* Pretty-print @sec into a string of up to 6 characters. */ const char *pretty_time(const unsigned sec) { static char buf[12]; unsigned d = sec / 86400, h = sec % 86400 / 3600, m = sec % 3600 / 60; if (d > 9) { sprintf(buf, "%u days", d); } else if (d) { if (h) { sprintf(buf, "%ud %uh", d, h); } else if (m) { sprintf(buf, "%ud %dm", d, m); } else { sprintf(buf, "%u day%s", d, d == 1 ? "" : "s"); } } else if (h) { sprintf(buf, "%u:%02uh", h, m); } else if (m) { sprintf(buf, "%u:%02um", m, sec % 60); } else { sprintf(buf, "%u sec", sec); } return buf; } /* Like pretty_time, but allow milliseconds */ const char *pretty_time_ms(const unsigned msec) { static char buf[12]; if (msec < 1000) { sprintf(buf, "%u ms", msec); return buf; } return pretty_time(msec/1000); } /* Absolute power measurement in dBm (IW_QUAL_DBM): map into -192 .. 63 range */ int u8_to_dbm(const int power) { return power > 63 ? power - 0x100 : power; } uint8_t dbm_to_u8(const int dbm) { return dbm < 0 ? dbm + 0x100 : dbm; } /* Convert log dBm values to linear mW */ double dbm2mw(const double in) { return pow(10.0, in / 10.0); } char *dbm2units(const double in) { static char with_units[0x100]; double val = dbm2mw(in); if (val < 0.00000001) { sprintf(with_units, "%.2f pW", val * 1e9); } else if (val < 0.00001) { sprintf(with_units, "%.2f nW", val * 1e6); } else if (val < 0.01) { sprintf(with_units, "%.2f uW", val * 1e3); } else { sprintf(with_units, "%.2f mW", val); } return with_units; } /* Convert linear mW values to log dBm */ double mw2dbm(const double in) { return 10.0 * log10(in); } /* Stolen from iw:util.c */ int ieee80211_frequency_to_channel(int freq) { /* see 802.11-2007 17.3.8.3.2 and Annex J */ if (freq == 2484) return 14; else if (freq < 2484) return (freq - 2407) / 5; else if (freq >= 4910 && freq <= 4980) return (freq - 4000) / 5; else if (freq <= 45000) /* DMG band lower limit */ return (freq - 5000) / 5; else if (freq >= 58320 && freq <= 64800) return (freq - 56160) / 2160; else return 0; } const char *channel_width_name(enum nl80211_chan_width width) { switch (width) { case NL80211_CHAN_WIDTH_20_NOHT: return "20 MHz (no HT)"; case NL80211_CHAN_WIDTH_20: return "20 MHz"; case NL80211_CHAN_WIDTH_40: return "40 MHz"; case NL80211_CHAN_WIDTH_80: return "80 MHz"; case NL80211_CHAN_WIDTH_80P80: return "80+80 MHz"; case NL80211_CHAN_WIDTH_160: return "160 MHz"; default: return "unknown"; } } /* stolen from iw:interface.c */ const char *channel_type_name(enum nl80211_channel_type channel_type) { switch (channel_type) { case NL80211_CHAN_NO_HT: return "NO HT"; case NL80211_CHAN_HT20: return "HT20"; case NL80211_CHAN_HT40MINUS: return "HT40-"; case NL80211_CHAN_HT40PLUS: return "HT40+"; default: return "unknown"; } } /* stolen from iw:util.c */ const char *iftype_name(enum nl80211_iftype iftype) { static char modebuf[100]; static const char *ifmodes[NL80211_IFTYPE_MAX + 1] = { "Unspecified", "IBSS", "Managed", "AP", "AP/VLAN", "WDS", "Monitor", "Mesh Point", "P2P-Client", "P2P-GO", "P2P-Device", "Outside of a BSS", }; if (iftype <= NL80211_IFTYPE_MAX && ifmodes[iftype]) return ifmodes[iftype]; sprintf(modebuf, "Unknown mode (%d)", iftype); return modebuf; } /* stolen from iw:reg.c */ const char *dfs_domain_name(enum nl80211_dfs_regions region) { switch (region) { case NL80211_DFS_UNSET: return "DFS-UNSET"; case NL80211_DFS_FCC: return "DFS-FCC"; case NL80211_DFS_ETSI: return "DFS-ETSI"; case NL80211_DFS_JP: return "DFS-JP"; default: return "DFS-invalid"; } }


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