utilities.c revision 330106
1#include <config.h> 2#include "utilities.h" 3#include <assert.h> 4 5/* Display a NTP packet in hex with leading address offset 6 * e.g. offset: value, 0: ff 1: fe ... 255: 00 7 */ 8void 9pkt_output ( 10 struct pkt *dpkg, 11 int pkt_length, 12 FILE *output 13 ) 14{ 15 register int a; 16 u_char *pkt; 17 18 pkt = (u_char *)dpkg; 19 20 fprintf(output, HLINE); 21 22 for (a = 0; a < pkt_length; a++) { 23 if (a > 0 && a % 8 == 0) 24 fprintf(output, "\n"); 25 26 fprintf(output, "%3d: %02x ", a, pkt[a]); 27 } 28 29 fprintf(output, "\n"); 30 fprintf(output, HLINE); 31} 32 33/* Output a long floating point value in hex in the style described above 34 */ 35void 36l_fp_output( 37 l_fp * ts, 38 FILE * output 39 ) 40{ 41 fprintf(output, "%s\n", prettydate(ts)); 42} 43 44/* Output a long floating point value in binary in the style described above 45 */ 46void 47l_fp_output_bin ( 48 l_fp *ts, 49 FILE *output 50 ) 51{ 52 register int a, b; 53 54 fprintf(output, HLINE); 55 56 for(a=0; a<8; a++) { 57 short tmp = ((unsigned char *) ts)[a]; 58 tmp++; 59 60 fprintf(output, "%i: ", a); 61 62 for(b=7; b>=0; b--) { 63 int texp = (int) pow(2, b); 64 65 if(tmp - texp > 0) { 66 fprintf(output, "1"); 67 tmp -= texp; 68 } 69 else { 70 fprintf(output, "0"); 71 } 72 } 73 74 fprintf(output, " "); 75 } 76 77 fprintf(output, "\n"); 78 fprintf(output, HLINE); 79} 80 81/* Output a long floating point value in decimal in the style described above 82 */ 83void 84l_fp_output_dec ( 85 l_fp *ts, 86 FILE *output 87 ) 88{ 89 register int a; 90 91 fprintf(output, HLINE); 92 93 for(a=0; a<8; a++) 94 fprintf(output, "%i: %i \t", a, ((unsigned char *) ts)[a]); 95 96 fprintf(output, "\n"); 97 fprintf(output, HLINE); 98 99} 100 101/* Convert a struct addrinfo to a string containing the address in style 102 * of inet_ntoa 103 */ 104char * 105addrinfo_to_str ( 106 const struct addrinfo *addr 107 ) 108{ 109 sockaddr_u s; 110 111 ZERO(s); 112 memcpy(&s, addr->ai_addr, min(sizeof(s), addr->ai_addrlen)); 113 114 return ss_to_str(&s); 115} 116 117 118/* Convert a sockaddr_u to a string containing the address in 119 * style of inet_ntoa 120 * Why not switch callers to use stoa from libntp? No free() needed 121 * in that case. 122 */ 123char * 124ss_to_str( 125 sockaddr_u *saddr 126 ) 127{ 128 return estrdup(stoa(saddr)); 129} 130 131 132/* 133 * Converts a struct tv to a date string 134 */ 135char * 136tv_to_str( 137 const struct timeval *tv 138 ) 139{ 140 const size_t bufsize = 48; 141 char *buf; 142 time_t gmt_time, local_time; 143 struct tm *p_tm_local; 144 int hh, mm, lto; 145 146 /* 147 * convert to struct tm in UTC, then intentionally feed 148 * that tm to mktime() which expects local time input, to 149 * derive the offset from UTC to local time. 150 */ 151 gmt_time = tv->tv_sec; 152 local_time = mktime(gmtime(&gmt_time)); 153 p_tm_local = localtime(&gmt_time); 154 155 /* Local timezone offsets should never cause an overflow. Yeah. */ 156 lto = difftime(local_time, gmt_time); 157 lto /= 60; 158 hh = lto / 60; 159 mm = abs(lto % 60); 160 161 buf = emalloc(bufsize); 162 snprintf(buf, bufsize, 163 "%d-%.2d-%.2d %.2d:%.2d:%.2d.%.6d (%+03d%02d)", 164 p_tm_local->tm_year + 1900, 165 p_tm_local->tm_mon + 1, 166 p_tm_local->tm_mday, 167 p_tm_local->tm_hour, 168 p_tm_local->tm_min, 169 p_tm_local->tm_sec, 170 (int)tv->tv_usec, 171 hh, 172 mm); 173 174 return buf; 175} 176 177 178/* 179 * 180 * hostnameaddr() 181 * 182 * Formats the hostname and resulting numeric IP address into a string, 183 * avoiding duplication if the "hostname" was in fact a numeric address. 184 * 185 */ 186const char * 187hostnameaddr( 188 const char * hostname, 189 const sockaddr_u * addr 190 ) 191{ 192 const char * addrtxt; 193 char * result; 194 int cnt; 195 196 addrtxt = stoa(addr); 197 LIB_GETBUF(result); 198 if (strcmp(hostname, addrtxt)) 199 cnt = snprintf(result, LIB_BUFLENGTH, "%s %s", 200 hostname, addrtxt); 201 else 202 cnt = snprintf(result, LIB_BUFLENGTH, "%s", addrtxt); 203 if (cnt >= LIB_BUFLENGTH) 204 snprintf(result, LIB_BUFLENGTH, 205 "hostnameaddr ERROR have %d (%d needed)", 206 LIB_BUFLENGTH, cnt + 1); 207 208 return result; 209} 210