1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332
|
#include "bandwidthd.h"
#ifdef USE_PGSQL
#include <libpq-fe.h>
#endif
// We must call regular exit to write out profile data, but child forks are supposed to usually
// call _exit?
#ifdef PROFILE
#define _exit(x) exit(x)
#endif
/*
#ifdef DEBUG
#define fork() (0)
#endif
*/
// ****************************************************************************************
// ** Global Variables
// ****************************************************************************************
static pcap_t *pd;
unsigned int GraphIntervalCount = 0;
unsigned int IpCount = 0;
unsigned int SubnetCount = 0;
time_t IntervalStart;
int RotateLogs = FALSE;
struct SubnetData SubnetTable[SUBNET_NUM];
struct IPData IpTable[IP_NUM];
int DataLink;
int IP_Offset;
struct IPDataStore *IPDataStore = NULL;
extern int bdconfig_parse(void);
extern FILE *bdconfig_in;
struct config config;
pid_t workerchildpids[NR_WORKER_CHILDS];
void signal_handler(int sig)
{
switch (sig)
{
case SIGHUP:
signal(SIGHUP, signal_handler);
RotateLogs++;
if (config.tag == '1')
{
int i;
/* signal children */
for (i=0; i < NR_WORKER_CHILDS; i++)
kill(workerchildpids[i], SIGHUP);
}
break;
case SIGTERM:
if (config.tag == '1')
{
int i;
/* send term signal to children */
for (i=0; i < NR_WORKER_CHILDS; i++)
kill(workerchildpids[i], SIGTERM);
}
// TODO: Might want to make sure we're not in the middle of wrighting out a log file
exit(0);
break;
}
}
void bd_CollectingData()
{
char FileName[4][MAX_FILENAME];
FILE *index;
int Counter;
snprintf(FileName[0], MAX_FILENAME, "%s/index.html", config.htdocs_dir);
snprintf(FileName[1], MAX_FILENAME, "%s/index2.html", config.htdocs_dir);
snprintf(FileName[2], MAX_FILENAME, "%s/index3.html", config.htdocs_dir);
snprintf(FileName[3], MAX_FILENAME, "%s/index4.html", config.htdocs_dir);
for(Counter = 0; Counter < 4; Counter++)
{
index = fopen(FileName[Counter], "wt");
if (index)
{
fprintf(index, "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">\n");
fprintf(index, "<HTML><HEAD><TITLE>Bandwidthd</TITLE>\n");
if (config.meta_refresh)
fprintf(index, "<META HTTP-EQUIV=\"REFRESH\" content=\"%u\">\n",
config.meta_refresh);
fprintf(index, "<META HTTP-EQUIV=\"EXPIRES\" content=\"-1\">\n");
fprintf(index, "<META HTTP-EQUIV=\"PRAGMA\" content=\"no-cache\">\n");
fprintf(index, "</HEAD>\n<BODY><center><img src=\"logo.gif\" ALT=\"Logo\"><BR>\n");
fprintf(index, "<BR>\n - <a href=\"index.html\">Daily</a> -- <a href=\"index2.html\">Weekly</a> -- ");
fprintf(index, "<a href=\"index3.html\">Monthly</a> -- <a href=\"index4.html\">Yearly</a><BR>\n");
fprintf(index, "</CENTER><BR>bandwidthd has nothing to graph. This message should be replaced by graphs in a few minutes. If it's not, please see the section titled \"Known Bugs and Troubleshooting\" in the README");
fprintf(index, "</BODY></HTML>\n");
fclose(index);
}
else
{
syslog(LOG_ERR, "Cannot open %s for writing", FileName[Counter]);
exit(1);
}
}
}
int WriteOutWebpages(long int timestamp)
{
struct IPDataStore *DataStore = IPDataStore;
struct SummaryData **SummaryData;
int NumGraphs = 0;
pid_t graphpid;
int Counter;
/* Did we catch any packets since last time? */
if (!DataStore) return -1;
// break off from the main line so we don't miss any packets while we graph
graphpid = fork();
switch (graphpid) {
case 0: /* we're the child, graph. */
{
#ifdef PROFILE
// Got this incantation from a message board. Don't forget to set
// GMON_OUT_PREFIX in the shell
extern void _start(void), etext(void);
syslog(LOG_INFO, "Calling profiler startup...");
monstartup((u_long) &_start, (u_long) &etext);
#endif
signal(SIGHUP, SIG_IGN);
nice(4); // reduce priority so I don't choke out other tasks
// Count Number of IP's in datastore
for (DataStore = IPDataStore, Counter = 0; DataStore; Counter++, DataStore = DataStore->Next);
// +1 because we don't want to accidently allocate 0
SummaryData = malloc(sizeof(struct SummaryData *)*Counter+1);
DataStore = IPDataStore;
while (DataStore) // Is not null
{
if (DataStore->FirstBlock->NumEntries > 0)
{
SummaryData[NumGraphs] = (struct SummaryData *) malloc(sizeof(struct SummaryData));
GraphIp(DataStore, SummaryData[NumGraphs++], timestamp+LEAD*config.range);
}
DataStore = DataStore->Next;
}
MakeIndexPages(NumGraphs, SummaryData);
_exit(0);
}
break;
case -1:
syslog(LOG_ERR, "Forking grapher child failed!");
return -2;
break;
default: /* parent + successful fork, assume graph success */
return 0;
break;
}
}
void setchildconfig (int level) {
static unsigned long long graph_cutoff;
switch (level) {
case 0:
config.range = RANGE1;
config.interval = INTERVAL1;
config.tag = '1';
graph_cutoff = config.graph_cutoff;
break;
case 1:
// Overide skip_intervals for children
config.skip_intervals = CONFIG_GRAPHINTERVALS;
config.range = RANGE2;
config.interval = INTERVAL2;
config.tag = '2';
config.graph_cutoff = graph_cutoff*(RANGE2/RANGE1);
break;
case 2:
// Overide skip_intervals for children
config.skip_intervals = CONFIG_GRAPHINTERVALS;
config.range = RANGE3;
config.interval = INTERVAL3;
config.tag = '3';
config.graph_cutoff = graph_cutoff*(RANGE3/RANGE1);
break;
case 3:
// Overide skip_intervals for children
config.skip_intervals = CONFIG_GRAPHINTERVALS;
config.range = RANGE4;
config.interval = INTERVAL4;
config.tag = '4';
config.graph_cutoff = graph_cutoff*(RANGE4/RANGE1);
break;
default:
syslog(LOG_ERR, "setchildconfig got an invalid level argument: %d", level);
_exit(1);
}
}
void makepidfile(pid_t pid)
{
FILE *pidfile;
pidfile = fopen("/var/run/bandwidthd.pid", "wt");
if (pidfile)
{
if (fprintf(pidfile, "%d\n", pid) == 0)
{
syslog(LOG_ERR, "Bandwidthd: failed to write '%d' to /var/run/bandwidthd.pid", pid);
fclose(pidfile);
unlink("/var/run/bandwidthd.pid");
}
else
fclose(pidfile);
}
else
syslog(LOG_ERR, "Could not open /var/run/bandwidthd.pid for write");
}
void PrintHelp(void)
{
printf("\nUsage: bandwidthd [OPTION]\n\nOptions:\n");
printf("\t-D\t\tDo not fork to background\n");
printf("\t-l\t\tList detected devices\n");
printf("\t-c filename\tAlternate configuration file\n");
printf("\t--help\t\tShow this help\n");
printf("\n");
exit(0);
}
int main(int argc, char **argv)
{
struct bpf_program fcode;
u_char *pcap_userdata = 0;
#ifdef HAVE_PCAP_FINDALLDEVS
pcap_if_t *Devices;
#endif
char Error[PCAP_ERRBUF_SIZE];
struct stat StatBuf;
int i;
int ForkBackground = TRUE;
int ListDevices = FALSE;
int Counter;
char *bd_conf = NULL;
signal(SIGHUP, SIG_IGN);
signal(SIGTERM, SIG_IGN);
for(Counter = 1; Counter < argc; Counter++)
{
if (argv[Counter][0] == '-')
{
switch(argv[Counter][1])
{
case 'D':
ForkBackground = FALSE;
break;
case 'l':
ListDevices = TRUE;
break;
case 'c':
if (argv[Counter+1])
{
bd_conf = argv[Counter+1];
Counter++;
}
else
PrintHelp();
break;
default:
printf("Improper argument: %s\n", argv[Counter]);
case '-':
PrintHelp();
}
}
}
config.dev = NULL;
config.filter = "ip";
config.skip_intervals = CONFIG_GRAPHINTERVALS;
config.graph_cutoff = CONFIG_GRAPHCUTOFF;
config.promisc = TRUE;
config.graph = TRUE;
config.output_cdf = FALSE;
config.recover_cdf = FALSE;
config.meta_refresh = CONFIG_METAREFRESH;
config.output_database = FALSE;
config.db_connect_string = NULL;
config.sensor_id = "unset";
config.log_dir = LOG_DIR;
config.htdocs_dir = HTDOCS_DIR;
openlog("bandwidthd", LOG_CONS, LOG_DAEMON);
// Locate configuration file
if (!(bd_conf && !stat(bd_conf, &StatBuf)))
{
if (bd_conf)
{
printf("Could not find %s\n", bd_conf);
exit(1);
}
else
if (!stat("bandwidthd.conf", &StatBuf))
bd_conf = "bandwidthd.conf";
else
if (!stat("./etc/bandwidthd.conf", &StatBuf))
bd_conf = "./etc/bandwidthd.conf";
else
if (!stat(CONFIG_FILE, &StatBuf))
bd_conf = CONFIG_FILE;
else
{
printf("Cannot find bandwidthd.conf, ./etc/bandwidthd.conf or %s\n", CONFIG_FILE);
syslog(LOG_ERR, "Cannot find bandwidthd.conf, ./etc/bandwidthd.conf or %s", CONFIG_FILE);
exit(1);
}
}
bdconfig_in = fopen(bd_conf, "rt");
if (!bdconfig_in)
{
syslog(LOG_ERR, "Cannot open bandwidthd.conf");
printf("Cannot open ./etc/bandwidthd.conf\n");
exit(1);
}
bdconfig_parse();
/*
// Scary
printf("Estimated max ram utilization\nDataPoints = %.0f/%ld = %.0f\nIPData = %d * DataPoints = %.1f (%.2fKBytes) per IP\nIP_NUM = %d\nTotal = %.1fMBytes * 4 to 8 = %.1fMBytes to %.1fMBytes\n",
RANGE1, INTERVAL1, RANGE1/INTERVAL1,
sizeof(struct IPData),
(float) sizeof(struct IPData)*(RANGE1/INTERVAL1),
(float) (sizeof(struct IPData)*(RANGE1/INTERVAL1))/1024.0,
IP_NUM,
(float)((sizeof(struct IPData)*(RANGE1/INTERVAL1)*IP_NUM)/1024.0)/1024.0,
(float)4*((sizeof(struct IPData)*(RANGE1/INTERVAL1)*IP_NUM)/1024.0)/1024.0,
(float)8*((sizeof(struct IPData)*(RANGE1/INTERVAL1)*IP_NUM)/1024.0)/1024.0);
printf("Sizeof unsigned long: %d, sizeof unsigned long long: %d\n%lu, %llu\n",
sizeof(unsigned long), sizeof (unsigned long long),
(unsigned long) (0-1), (unsigned long long) (0-1));
exit(1);
*/
#ifdef HAVE_PCAP_FINDALLDEVS
pcap_findalldevs(&Devices, Error);
if (config.dev == NULL && Devices && Devices->name)
config.dev = strdup(Devices->name);
if (ListDevices)
{
while(Devices)
{
printf("Description: %s\nName: \"%s\"\n\n", Devices->description, Devices->name);
Devices = Devices->next;
}
exit(0);
}
#else
if (ListDevices)
{
printf("List devices is not supported by you version of libpcap\n");
exit(0);
}
#endif
if (config.graph)
bd_CollectingData();
/* detach from console. */
if (ForkBackground)
if (fork2())
exit(0);
makepidfile(getpid());
setchildconfig(0); /* initialize first (day graphing) process config */
if (config.graph || config.output_cdf)
{
/* fork processes for week, month and year graphing. */
for (i=0; i<NR_WORKER_CHILDS; i++)
{
workerchildpids[i] = fork();
/* initialize children and let them start doing work,
* while parent continues to fork children.
*/
if (workerchildpids[i] == 0)
{ /* child */
setchildconfig(i+1);
break;
}
if (workerchildpids[i] == -1)
{ /* fork failed */
syslog(LOG_ERR, "Failed to fork graphing child (%d)", i);
/* i--; ..to retry? -> possible infinite loop */
continue;
}
}
}
signal(SIGHUP, signal_handler);
signal(SIGTERM, signal_handler);
if(config.recover_cdf)
RecoverDataFromCDF();
IntervalStart = time(NULL);
syslog(LOG_INFO, "Opening %s", config.dev);
pd = pcap_open_live(config.dev, 100, config.promisc, 1000, Error);
if (pd == NULL)
{
syslog(LOG_ERR, "%s", Error);
exit(0);
}
if (pcap_compile(pd, &fcode, config.filter, 1, 0) < 0)
{
pcap_perror(pd, "Error");
printf("Malformed libpcap filter string in bandwidthd.conf\n");
syslog(LOG_ERR, "Malformed libpcap filter string in bandwidthd.conf");
exit(1);
}
if (pcap_setfilter(pd, &fcode) < 0)
pcap_perror(pd, "Error");
switch (DataLink = pcap_datalink(pd))
{
default:
if (config.dev)
printf("Unknown Datalink Type %d, defaulting to ethernet\nPlease forward this error message and a packet sample (captured with \"tcpdump -i %s -s 2000 -n -w capture.cap\") to hinkle@derbyworks.com\n", DataLink, config.dev);
else
printf("Unknown Datalink Type %d, defaulting to ethernet\nPlease forward this error message and a packet sample (captured with \"tcpdump -s 2000 -n -w capture.cap\") to hinkle@derbyworks.com\n", DataLink);
syslog(LOG_INFO, "Unkown datalink type, defaulting to ethernet");
case DLT_EN10MB:
syslog(LOG_INFO, "Packet Encoding: Ethernet");
IP_Offset = 14; //IP_Offset = sizeof(struct ether_header);
break;
#ifdef DLT_LINUX_SLL
case DLT_LINUX_SLL:
syslog(LOG_INFO, "Packet Encoding: Linux Cooked Socket");
IP_Offset = 16;
break;
#endif
#ifdef DLT_RAW
case DLT_RAW:
printf("Untested Datalink Type %d\nPlease report to hinkle@derbyworks.net if bandwidthd works for you\non this interface\n", DataLink);
printf("Packet Encoding:\n\tRaw\n");
syslog(LOG_INFO, "Untested packet encoding: Raw");
IP_Offset = 0;
break;
#endif
case DLT_IEEE802:
printf("Untested Datalink Type %d\nPlease report to hinkle@derbyworks.net if bandwidthd works for you\non this interface\n", DataLink);
printf("Packet Encoding:\nToken Ring\n");
syslog(LOG_INFO, "Untested packet encoding: Token Ring");
IP_Offset = 22;
break;
}
if (ForkBackground)
{
fclose(stdin);
fclose(stdout);
fclose(stderr);
}
if (IPDataStore) // If there is data in the datastore draw some initial graphs
{
syslog(LOG_INFO, "Drawing initial graphs");
WriteOutWebpages(IntervalStart+config.interval);
}
if (pcap_loop(pd, -1, PacketCallback, pcap_userdata) < 0) {
syslog(LOG_ERR, "Bandwidthd: pcap_loop: %s", pcap_geterr(pd));
exit(1);
}
pcap_close(pd);
exit(0);
}
void PacketCallback(u_char *user, const struct pcap_pkthdr *h, const u_char *p)
{
unsigned int counter;
u_int caplen = h->caplen;
const struct ip *ip;
uint32_t srcip;
uint32_t dstip;
struct IPData *ptrIPData;
if (h->ts.tv_sec > IntervalStart + config.interval) // Then write out this intervals data and possibly kick off the grapher
{
GraphIntervalCount++;
CommitData(IntervalStart+config.interval);
IpCount = 0;
IntervalStart=h->ts.tv_sec;
}
caplen -= IP_Offset; // We're only measuring ip size, so pull off the ethernet header
p += IP_Offset; // Move the pointer past the datalink header
ip = (const struct ip *)p; // Point ip at the ip header
if (ip->ip_v != 4) // then not an ip packet so skip it
return;
srcip = ntohl(*(uint32_t *) (&ip->ip_src));
dstip = ntohl(*(uint32_t *) (&ip->ip_dst));
for (counter = 0; counter < SubnetCount; counter++)
{
// Packets from a monitored subnet to a monitored subnet will be
// credited to both ip's
if (SubnetTable[counter].ip == (srcip & SubnetTable[counter].mask))
{
ptrIPData = FindIp(srcip); // Return or create this ip's data structure
if (ptrIPData)
Credit(&(ptrIPData->Send), ip);
ptrIPData = FindIp(0); // Totals
if (ptrIPData)
Credit(&(ptrIPData->Send), ip);
}
if (SubnetTable[counter].ip == (dstip & SubnetTable[counter].mask))
{
ptrIPData = FindIp(dstip);
if (ptrIPData)
Credit(&(ptrIPData->Receive), ip);
ptrIPData = FindIp(0);
if (ptrIPData)
Credit(&(ptrIPData->Receive), ip);
}
}
}
inline void Credit(struct Statistics *Stats, const struct ip *ip)
{
unsigned long size;
const struct tcphdr *tcp;
uint16_t sport, dport;
size = ntohs(ip->ip_len);
Stats->total += size;
switch(ip->ip_p)
{
case 6: // TCP
tcp = (struct tcphdr *)(ip+1);
tcp = (struct tcphdr *) ( ((char *)tcp) + ((ip->ip_hl-5)*4) ); // Compensate for IP Options
Stats->tcp += size;
sport = ntohs(tcp->TCPHDR_SPORT);
dport = ntohs(tcp->TCPHDR_DPORT);
if (sport == 80 || dport == 80 || sport == 443 || dport == 443)
Stats->http += size;
if (sport == 20 || dport == 20 || sport == 21 || dport == 21)
Stats->ftp += size;
if (sport == 1044|| dport == 1044|| // Direct File Express
sport == 1045|| dport == 1045|| // '' <- Dito Marks
sport == 1214|| dport == 1214|| // Grokster, Kaza, Morpheus
sport == 4661|| dport == 4661|| // EDonkey 2000
sport == 4662|| dport == 4662|| // ''
sport == 4665|| dport == 4665|| // ''
sport == 5190|| dport == 5190|| // Song Spy
sport == 5500|| dport == 5500|| // Hotline Connect
sport == 5501|| dport == 5501|| // ''
sport == 5502|| dport == 5502|| // ''
sport == 5503|| dport == 5503|| // ''
sport == 6346|| dport == 6346|| // Gnutella Engine
sport == 6347|| dport == 6347|| // ''
sport == 6666|| dport == 6666|| // Yoink
sport == 6667|| dport == 6667|| // ''
sport == 7788|| dport == 7788|| // Budy Share
sport == 8888|| dport == 8888|| // AudioGnome, OpenNap, Swaptor
sport == 8889|| dport == 8889|| // AudioGnome, OpenNap
sport == 28864|| dport == 28864|| // hotComm
sport == 28865|| dport == 28865) // hotComm
Stats->p2p += size;
break;
case 17:
Stats->udp += size;
break;
case 1:
Stats->icmp += size;
break;
}
}
// TODO: Throw away old data!
void DropOldData(long int timestamp) // Go through the ram datastore and dump old data
{
struct IPDataStore *DataStore;
struct IPDataStore *PrevDataStore;
struct DataStoreBlock *DeletedBlock;
PrevDataStore = NULL;
DataStore = IPDataStore;
// Progress through the linked list until we reach the end
while(DataStore) // we have data
{
// If the First block is out of date, purge it, if it is the only block
// purge the node
while(DataStore->FirstBlock->LatestTimestamp < timestamp - config.range)
{
if ((!DataStore->FirstBlock->Next) && PrevDataStore) // There is no valid block of data for this ip, so unlink the whole ip
{ // Don't bother unlinking the ip if it's the first one, that's to much
// Trouble
PrevDataStore->Next = DataStore->Next; // Unlink the node
free(DataStore->FirstBlock->Data); // Free the memory
free(DataStore->FirstBlock);
free(DataStore);
DataStore = PrevDataStore->Next; // Go to the next node
if (!DataStore) return; // We're done
}
else if (!DataStore->FirstBlock->Next)
{
// There is no valid block of data for this ip, and we are
// the first ip, so do nothing
break; // break out of this loop so the outside loop increments us
}
else // Just unlink this block
{
DeletedBlock = DataStore->FirstBlock;
DataStore->FirstBlock = DataStore->FirstBlock->Next; // Unlink the block
free(DeletedBlock->Data);
free(DeletedBlock);
}
}
PrevDataStore = DataStore;
DataStore = DataStore->Next;
}
}
void StoreIPDataInPostgresql(struct IPData IncData[])
{
#ifdef USE_PGSQL
struct IPData *IPData;
unsigned int counter;
struct Statistics *Stats;
PGresult *res;
static PGconn *conn = NULL;
static char sensor_id[50];
const char *paramValues[10];
char *sql1;
char *sql2;
char Values[10][50];
if (!config.output_database == DB_PGSQL)
return;
paramValues[0] = Values[0];
paramValues[1] = Values[1];
paramValues[2] = Values[2];
paramValues[3] = Values[3];
paramValues[4] = Values[4];
paramValues[5] = Values[5];
paramValues[6] = Values[6];
paramValues[7] = Values[7];
paramValues[8] = Values[8];
paramValues[9] = Values[9];
// ************ Inititialize the db if it's not already
if (!conn)
{
/* Connect to the database */
conn = PQconnectdb(config.db_connect_string);
/* Check to see that the backend connection was successfully made */
if (PQstatus(conn) != CONNECTION_OK)
{
syslog(LOG_ERR, "Connection to database '%s' failed: %s", config.db_connect_string, PQerrorMessage(conn));
PQfinish(conn);
conn = NULL;
return;
}
strncpy(Values[0], config.sensor_id, 50);
res = PQexecParams(conn, "select sensor_id from sensors where sensor_name = $1;",
1, /* one param */
NULL, /* let the backend deduce param type */
paramValues,
NULL, /* don't need param lengths since text */
NULL, /* default to all text params */
0); /* ask for binary results */
if (PQresultStatus(res) != PGRES_TUPLES_OK)
{
syslog(LOG_ERR, "Postresql SELECT failed: %s", PQerrorMessage(conn));
PQclear(res);
PQfinish(conn);
conn = NULL;
return;
}
if (PQntuples(res))
{
strncpy(sensor_id, PQgetvalue(res, 0, 0), 50);
PQclear(res);
}
else
{
// Insert new sensor id
PQclear(res);
res = PQexecParams(conn, "insert into sensors (sensor_name, last_connection) VALUES ($1, now());",
1, /* one param */
NULL, /* let the backend deduce param type */
paramValues,
NULL, /* don't need param lengths since text */
NULL, /* default to all text params */
0); /* ask for binary results */
if (PQresultStatus(res) != PGRES_COMMAND_OK)
{
syslog(LOG_ERR, "Postresql INSERT failed: %s", PQerrorMessage(conn));
PQclear(res);
PQfinish(conn);
conn = NULL;
return;
}
PQclear(res);
res = PQexecParams(conn, "select sensor_id from sensors where sensor_name = $1;",
1, /* one param */
NULL, /* let the backend deduce param type */
paramValues,
NULL, /* don't need param lengths since text */
NULL, /* default to all text params */
0); /* ask for binary results */
if (PQresultStatus(res) != PGRES_TUPLES_OK)
{
syslog(LOG_ERR, "Postresql SELECT failed: %s", PQerrorMessage(conn));
PQclear(res);
PQfinish(conn);
conn = NULL;
return;
}
strncpy(sensor_id, PQgetvalue(res, 0, 0), 50);
PQclear(res);
}
}
// Begin transaction
// **** Perform inserts
res = PQexecParams(conn, "BEGIN;",
0, /* zero param */
NULL, /* let the backend deduce param type */
NULL,
NULL, /* don't need param lengths since text */
NULL, /* default to all text params */
0); /* ask for binary results */
if (PQresultStatus(res) != PGRES_COMMAND_OK)
{
syslog(LOG_ERR, "Postresql BEGIN failed: %s", PQerrorMessage(conn));
PQclear(res);
PQfinish(conn);
conn = NULL;
return;
}
PQclear(res);
strncpy(Values[0], sensor_id, 50);
res = PQexecParams(conn, "update sensors set last_connection = now() where sensor_id = $1;",
1, /* one param */
NULL, /* let the backend deduce param type */
paramValues,
NULL, /* don't need param lengths since text */
NULL, /* default to all text params */
0); /* ask for binary results */
if (PQresultStatus(res) != PGRES_COMMAND_OK)
{
syslog(LOG_ERR, "Postresql UPDATE failed: %s", PQerrorMessage(conn));
PQclear(res);
PQfinish(conn);
conn = NULL;
return;
}
PQclear(res);
Values[0][49] = '\0';
snprintf(Values[1], 50, "%llu", config.interval);
for (counter=0; counter < IpCount; counter++)
{
IPData = &IncData[counter];
if (IPData->ip == 0)
{
// This optimization allows us to quickly draw totals graphs for a sensor
sql1 = "INSERT INTO bd_tx_total_log (sensor_id, sample_duration, ip, total, icmp, udp, tcp, ftp, http, p2p) VALUES($1, $2, $3, $4, $5, $6, $7, $8, $9, $10);";
sql2 = "INSERT INTO bd_rx_total_log (sensor_id, sample_duration, ip, total, icmp, udp, tcp, ftp, http, p2p) VALUES($1, $2, $3, $4, $5, $6, $7, $8, $9, $10);";
}
else
{
sql1 = "INSERT INTO bd_tx_log (sensor_id, sample_duration, ip, total, icmp, udp, tcp, ftp, http, p2p) VALUES($1, $2, $3, $4, $5, $6, $7, $8, $9, $10);";
sql2 = "INSERT INTO bd_rx_log (sensor_id, sample_duration, ip, total, icmp, udp, tcp, ftp, http, p2p) VALUES($1, $2, $3, $4, $5, $6, $7, $8, $9, $10);";
}
HostIp2CharIp(IPData->ip, Values[2]);
Stats = &(IPData->Send);
if (Stats->total > 512) // Don't log empty sets
{
// Log data in kilobytes
snprintf(Values[3], 50, "%llu", (long long unsigned int)((((double)Stats->total)/1024.0) + 0.5));
snprintf(Values[4], 50, "%llu", (long long unsigned int)((((double)Stats->icmp)/1024.0) + 0.5));
snprintf(Values[5], 50, "%llu", (long long unsigned int)((((double)Stats->udp)/1024.0) + 0.5));
snprintf(Values[6], 50, "%llu", (long long unsigned int)((((double)Stats->tcp)/1024.0) + 0.5));
snprintf(Values[7], 50, "%llu", (long long unsigned int)((((double)Stats->ftp)/1024.0) + 0.5));
snprintf(Values[8], 50, "%llu", (long long unsigned int)((((double)Stats->http)/1024.0) + 0.5));
snprintf(Values[9], 50, "%llu", (long long unsigned int)((((double)Stats->p2p)/1024.0) + 0.5));
res = PQexecParams(conn, sql1,
10, /* nine param */
NULL, /* let the backend deduce param type */
paramValues,
NULL, /* don't need param lengths since text */
NULL, /* default to all text params */
1); /* ask for binary results */
if (PQresultStatus(res) != PGRES_COMMAND_OK)
{
syslog(LOG_ERR, "Postresql INSERT failed: %s", PQerrorMessage(conn));
PQclear(res);
PQfinish(conn);
conn = NULL;
return;
}
PQclear(res);
}
Stats = &(IPData->Receive);
if (Stats->total > 512) // Don't log empty sets
{
snprintf(Values[3], 50, "%llu", (long long unsigned int)((((double)Stats->total)/1024.0) + 0.5));
snprintf(Values[4], 50, "%llu", (long long unsigned int)((((double)Stats->icmp)/1024.0) + 0.5));
snprintf(Values[5], 50, "%llu", (long long unsigned int)((((double)Stats->udp)/1024.0) + 0.5));
snprintf(Values[6], 50, "%llu", (long long unsigned int)((((double)Stats->tcp)/1024.0) + 0.5));
snprintf(Values[7], 50, "%llu", (long long unsigned int)((((double)Stats->ftp)/1024.0) + 0.5));
snprintf(Values[8], 50, "%llu", (long long unsigned int)((((double)Stats->http)/1024.0) + 0.5));
snprintf(Values[9], 50, "%llu", (long long unsigned int)((((double)Stats->p2p)/1024.0) + 0.5));
res = PQexecParams(conn, sql2,
10, /* seven param */
NULL, /* let the backend deduce param type */
paramValues,
NULL, /* don't need param lengths since text */
NULL, /* default to all text params */
1); /* ask for binary results */
if (PQresultStatus(res) != PGRES_COMMAND_OK)
{
syslog(LOG_ERR, "Postresql INSERT failed: %s", PQerrorMessage(conn));
PQclear(res);
PQfinish(conn);
conn = NULL;
return;
}
PQclear(res);
}
}
// Commit transaction
res = PQexecParams(conn, "COMMIT;",
0, /* zero param */
NULL, /* let the backend deduce param type */
NULL,
NULL, /* don't need param lengths since text */
NULL, /* default to all text params */
0); /* ask for binary results */
if (PQresultStatus(res) != PGRES_COMMAND_OK)
{
syslog(LOG_ERR, "Postresql COMMIT failed: %s", PQerrorMessage(conn));
PQclear(res);
PQfinish(conn);
conn = NULL;
return;
}
PQclear(res);
#else
syslog(LOG_ERR, "Postgresql logging selected but postgresql support is not compiled into binary. Please check the documentation in README, distributed with this software.");
#endif
}
void StoreIPDataInDatabase(struct IPData IncData[])
{
if (config.output_database == DB_PGSQL)
StoreIPDataInPostgresql(IncData);
}
void StoreIPDataInCDF(struct IPData IncData[])
{
struct IPData *IPData;
unsigned int counter;
FILE *cdf;
struct Statistics *Stats;
char IPBuffer[50];
char logfile[MAX_FILENAME];
snprintf(logfile, MAX_FILENAME, "%s/log.%c.0.cdf", config.log_dir, config.tag);
cdf = fopen(logfile, "at");
for (counter=0; counter < IpCount; counter++)
{
IPData = &IncData[counter];
HostIp2CharIp(IPData->ip, IPBuffer);
fprintf(cdf, "%s,%lu,", IPBuffer, IPData->timestamp);
Stats = &(IPData->Send);
fprintf(cdf, "%llu,%llu,%llu,%llu,%llu,%llu,%llu,", Stats->total, Stats->icmp, Stats->udp, Stats->tcp, Stats->ftp, Stats->http, Stats->p2p);
Stats = &(IPData->Receive);
fprintf(cdf, "%llu,%llu,%llu,%llu,%llu,%llu,%llu\n", Stats->total, Stats->icmp, Stats->udp, Stats->tcp, Stats->ftp, Stats->http, Stats->p2p);
}
fclose(cdf);
}
void _StoreIPDataInRam(struct IPData *IPData)
{
struct IPDataStore *DataStore;
struct DataStoreBlock *DataStoreBlock;
if (!IPDataStore) // we need to create the first entry
{
// Allocate Datastore for this IP
IPDataStore = malloc(sizeof(struct IPDataStore));
IPDataStore->ip = IPData->ip;
IPDataStore->Next = NULL;
// Allocate it's first block of storage
IPDataStore->FirstBlock = malloc(sizeof(struct DataStoreBlock));
IPDataStore->FirstBlock->LatestTimestamp = 0;
IPDataStore->FirstBlock->NumEntries = 0;
IPDataStore->FirstBlock->Data = calloc(IPDATAALLOCCHUNKS, sizeof(struct IPData));
IPDataStore->FirstBlock->Next = NULL;
if (!IPDataStore->FirstBlock || ! IPDataStore->FirstBlock->Data)
{
syslog(LOG_ERR, "Could not allocate datastore! Exiting!");
exit(1);
}
}
DataStore = IPDataStore;
// Take care of first case
while (DataStore) // Is not null
{
if (DataStore->ip == IPData->ip) // then we have the right store
{
DataStoreBlock = DataStore->FirstBlock;
while(DataStoreBlock) // is not null
{
if (DataStoreBlock->NumEntries < IPDATAALLOCCHUNKS) // We have a free spot
{
memcpy(&DataStoreBlock->Data[DataStoreBlock->NumEntries++], IPData, sizeof(struct IPData));
DataStoreBlock->LatestTimestamp = IPData->timestamp;
return;
}
else
{
if (!DataStoreBlock->Next) // there isn't another block, add one
{
DataStoreBlock->Next = malloc(sizeof(struct DataStoreBlock));
DataStoreBlock->Next->LatestTimestamp = 0;
DataStoreBlock->Next->NumEntries = 0;
DataStoreBlock->Next->Data = calloc(IPDATAALLOCCHUNKS, sizeof(struct IPData));
DataStoreBlock->Next->Next = NULL;
}
DataStoreBlock = DataStoreBlock->Next;
}
}
return;
}
else
{
if (!DataStore->Next) // there is no entry for this ip, so lets make one.
{
// Allocate Datastore for this IP
DataStore->Next = malloc(sizeof(struct IPDataStore));
DataStore->Next->ip = IPData->ip;
DataStore->Next->Next = NULL;
// Allocate it's first block of storage
DataStore->Next->FirstBlock = malloc(sizeof(struct DataStoreBlock));
DataStore->Next->FirstBlock->LatestTimestamp = 0;
DataStore->Next->FirstBlock->NumEntries = 0;
DataStore->Next->FirstBlock->Data = calloc(IPDATAALLOCCHUNKS, sizeof(struct IPData));
DataStore->Next->FirstBlock->Next = NULL;
}
DataStore = DataStore->Next;
}
}
}
void StoreIPDataInRam(struct IPData IncData[])
{
unsigned int counter;
for (counter=0; counter < IpCount; counter++)
_StoreIPDataInRam(&IncData[counter]);
}
void CommitData(time_t timestamp)
{
static int MayGraph = TRUE;
unsigned int counter;
struct stat StatBuf;
char logname1[MAX_FILENAME];
char logname2[MAX_FILENAME];
int offset;
// Set the timestamps
for (counter=0; counter < IpCount; counter++)
IpTable[counter].timestamp = timestamp;
// Output modules
// Only call this from first thread
if (config.output_database && config.tag == '1')
StoreIPDataInDatabase(IpTable);
if (config.output_cdf)
{
// TODO: This needs to be moved into the forked section, but I don't want to
// deal with that right now (Heavy disk io may make us drop packets)
StoreIPDataInCDF(IpTable);
if (RotateLogs >= config.range/RANGE1) // We set this++ on HUP
{
snprintf(logname1, MAX_FILENAME, "%s/log.%c.%n4.cdf", config.log_dir, config.tag, &offset);
snprintf(logname2, MAX_FILENAME, "%s/log.%c.5.cdf", config.log_dir, config.tag);
if (!stat(logname2, &StatBuf)) // File exists
unlink(logname2);
if (!stat(logname1, &StatBuf)) // File exists
rename(logname1, logname2);
logname1[offset] = '3';
logname2[offset] = '4';
if (!stat(logname1, &StatBuf)) // File exists
rename(logname1, logname2);
logname1[offset] = '2';
logname2[offset] = '3';
if (!stat(logname1, &StatBuf)) // File exists
rename(logname1, logname2);
logname1[offset] = '1';
logname2[offset] = '2';
if (!stat(logname1, &StatBuf)) // File exists
rename(logname1, logname2);
logname1[offset] = '0';
logname2[offset] = '1';
if (!stat(logname1, &StatBuf)) // File exists
rename(logname1, logname2);
fclose(fopen(logname1, "at")); // Touch file
RotateLogs = FALSE;
}
}
if (config.graph)
{
StoreIPDataInRam(IpTable);
// Reap a couple zombies
if (waitpid(-1, NULL, WNOHANG)) // A child was reaped
MayGraph = TRUE;
if (GraphIntervalCount%config.skip_intervals == 0 && MayGraph)
{
MayGraph = FALSE;
/* If WriteOutWebpages fails, reenable graphing since there won't
* be any children to reap.
*/
if (WriteOutWebpages(timestamp))
MayGraph = TRUE;
}
else if (GraphIntervalCount%config.skip_intervals == 0)
syslog(LOG_INFO, "Previouse graphing run not complete... Skipping current run");
DropOldData(timestamp);
}
}
int RCDF_Test(char *filename)
{
// Determine if the first date in the file is before the cutoff
// return FALSE on error
FILE *cdf;
char ipaddrBuffer[16];
time_t timestamp;
if (!(cdf = fopen(filename, "rt")))
return FALSE;
fseek(cdf, 10, SEEK_END); // fseek to near end of file
while (fgetc(cdf) != '\n') // rewind to last newline
{
if (fseek(cdf, -2, SEEK_CUR) == -1)
break;
}
if(fscanf(cdf, " %15[0-9.],%lu,", ipaddrBuffer, ×tamp) != 2)
{
syslog(LOG_ERR, "%s is corrupted, skipping", filename);
return FALSE;
}
fclose(cdf);
if (timestamp < time(NULL) - config.range)
return FALSE; // There is no data in this file from after the cutoff
else
return TRUE; // This file has data from after the cutoff
}
void RCDF_PositionStream(FILE *cdf)
{
time_t timestamp;
time_t current_timestamp;
char ipaddrBuffer[16];
current_timestamp = time(NULL);
fseek(cdf, 0, SEEK_END);
timestamp = current_timestamp;
while (timestamp > current_timestamp - config.range)
{
// What happenes if we seek past the beginning of the file?
if (fseek(cdf, -512*1024,SEEK_CUR) == -1 || ferror(cdf))
{ // fseek returned error, just seek to beginning
clearerr(cdf);
fseek(cdf, 0, SEEK_SET);
return;
}
while (fgetc(cdf) != '\n' && !feof(cdf)); // Read to next line
ungetc('\n', cdf); // Just so the fscanf mask stays identical
if(fscanf(cdf, " %15[0-9.],%lu,", ipaddrBuffer, ×tamp) != 2)
{
syslog(LOG_ERR, "Unknown error while scanning for beginning of data...\n");
return;
}
}
while (fgetc(cdf) != '\n' && !feof(cdf));
ungetc('\n', cdf);
}
void RCDF_Load(FILE *cdf)
{
time_t timestamp;
time_t current_timestamp = 0;
struct in_addr ipaddr;
struct IPData *ip=NULL;
char ipaddrBuffer[16];
unsigned long int Counter = 0;
unsigned long int IntervalsRead = 0;
for(Counter = 0; !feof(cdf) && !ferror(cdf); Counter++)
{
if(fscanf(cdf, " %15[0-9.],%lu,", ipaddrBuffer, ×tamp) != 2)
goto End_RecoverDataFromCdf;
if (!timestamp) // First run through loop
current_timestamp = timestamp;
if (timestamp != current_timestamp)
{ // Dump to datastore
StoreIPDataInRam(IpTable);
IpCount = 0; // Reset Traffic Counters
current_timestamp = timestamp;
IntervalsRead++;
}
inet_aton(ipaddrBuffer, &ipaddr);
ip = FindIp(ntohl(ipaddr.s_addr));
ip->timestamp = timestamp;
if (fscanf(cdf, "%llu,%llu,%llu,%llu,%llu,%llu,%llu,",
&ip->Send.total, &ip->Send.icmp, &ip->Send.udp,
&ip->Send.tcp, &ip->Send.ftp, &ip->Send.http, &ip->Send.p2p) != 7
|| fscanf(cdf, "%llu,%llu,%llu,%llu,%llu,%llu,%llu",
&ip->Receive.total, &ip->Receive.icmp, &ip->Receive.udp,
&ip->Receive.tcp, &ip->Receive.ftp, &ip->Receive.http, &ip->Receive.p2p) != 7)
goto End_RecoverDataFromCdf;
}
End_RecoverDataFromCdf:
StoreIPDataInRam(IpTable);
syslog(LOG_INFO, "Finished recovering %lu records", Counter);
DropOldData(time(NULL)); // Dump the extra data
if(!feof(cdf))
syslog(LOG_ERR, "Failed to parse part of log file. Giving up on the file");
IpCount = 0; // Reset traffic counters
fclose(cdf);
}
void RecoverDataFromCDF(void)
{
FILE *cdf;
char index[] = "012345";
char logname[MAX_FILENAME];
int offset;
int Counter;
int First = FALSE;
snprintf(logname, MAX_FILENAME, "%s/log.%c.%n0.cdf", config.log_dir, config.tag, &offset);
for (Counter = 5; Counter >= 0; Counter--)
{
logname[offset] = index[Counter];
if (RCDF_Test(logname))
break;
}
First = TRUE;
for (; Counter >= 0; Counter--)
{
logname[offset] = index[Counter];
if ((cdf = fopen(logname, "rt")))
{
syslog(LOG_INFO, "Recovering from %s", logname);
if (First)
{
RCDF_PositionStream(cdf);
First = FALSE;
}
RCDF_Load(cdf);
}
}
}
// ****** FindIp **********
// ****** Returns or allocates an Ip's data structure
inline struct IPData *FindIp(uint32_t ipaddr)
{
unsigned int counter;
for (counter=0; counter < IpCount; counter++)
if (IpTable[counter].ip == ipaddr)
return (&IpTable[counter]);
if (IpCount >= IP_NUM)
{
syslog(LOG_ERR, "IP_NUM is too low, dropping ip....");
return(NULL);
}
memset(&IpTable[IpCount], 0, sizeof(struct IPData));
IpTable[IpCount].ip = ipaddr;
return (&IpTable[IpCount++]);
}
size_t ICGrandTotalDataPoints = 0;
char inline *HostIp2CharIp(unsigned long ipaddr, char *buffer)
{
struct in_addr in_addr;
char *s;
in_addr.s_addr = htonl(ipaddr);
s = inet_ntoa(in_addr);
strncpy(buffer, s, 16);
buffer[15] = '\0';
return(buffer);
/* uint32_t ip = *(uint32_t *)ipaddr;
sprintf(buffer, "%d.%d.%d.%d", (ip << 24) >> 24, (ip << 16) >> 24, (ip << 8) >> 24, (ip << 0) >> 24);
*/
}
// Add better error checking
int fork2()
{
pid_t pid;
if (!(pid = fork()))
{
if (!fork())
{
#ifdef PROFILE
// Got this incantation from a message board. Don't forget to set
// GMON_OUT_PREFIX in the shell
extern void _start(void), etext(void);
syslog(LOG_INFO, "Calling profiler startup...");
monstartup((u_long) &_start, (u_long) &etext);
#endif
return(0);
}
_exit(0);
}
waitpid(pid, NULL, 0);
return(1);
}
|