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# rpcapd.c

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    00001 /*
    00002  * Copyright (c) 2002 - 2003
    00003  * NetGroup, Politecnico di Torino (Italy)
    00004  * All rights reserved.
    00005  *
    00006  * Redistribution and use in source and binary forms, with or without
    00007  * modification, are permitted provided that the following conditions
    00008  * are met:
    00009  *
    00010  * 1. Redistributions of source code must retain the above copyright
    00011  * notice, this list of conditions and the following disclaimer.
    00012  * 2. Redistributions in binary form must reproduce the above copyright
    00013  * notice, this list of conditions and the following disclaimer in the
    00014  * documentation and/or other materials provided with the distribution.
    00015  * 3. Neither the name of the Politecnico di Torino nor the names of its
    00016  * contributors may be used to endorse or promote products derived from
    00017  * this software without specific prior written permission.
    00018  *
    00019  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
    00020  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
    00021  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
    00022  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
    00023  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
    00024  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
    00025  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
    00026  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
    00027  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
    00028  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
    00029  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    00030  *
    00031  */
    00032
    00033
    00034
    00035
    00036
    00037 #include <errno.h>      // for the errno variable
    00038 #include <string.h>     // for strtok, etc
    00039 #include <stdlib.h>     // for malloc(), free(), ...
    00040 #include <pcap.h>       // for PCAP_ERRBUF_SIZE
    00041 #include <signal.h>     // for signal()
    00042 #include <pthread.h>
    00043 #include "rpcapd.h"
    00044 #include "fileconf.h"   // for the configuration file management
    00045 #include "pcap-remote.h"
    00046 #include "daemon.h"     // the true main() method of this daemon
    00047 #include "utils.h"      // Missing calls and such
    00048 #include "sockutils.h"  // for socket calls
    00049
    00050 #ifndef WIN32
    00051 #include <unistd.h>     // for exit()
    00052 #include <sys/wait.h>   // waitpid()
    00053 #else
    00054 #include "win32-svc.h"  // for Win32 service stuff
    00055 #endif
    00056
    00057
    00058 // Global variables
    00059 char hostlist[MAX_HOST_LIST + 1];
    00060 struct active_pars activelist[MAX_ACTIVE_LIST];
    00061 int nullAuthAllowed;
    00062 SOCKET sockmain;
    00063 char loadfile[MAX_LINE + 1];
    00064 int passivemode= 1;
    00065 struct addrinfo mainhints;
    00066 char address[MAX_LINE + 1];
    00067 char port[MAX_LINE + 1];
    00068
    00069 extern char *optarg;    // for getopt()
    00070
    00071
    00072
    00073 // Function definition
    00074 void main_passive(void *ptr);
    00075 void main_active(void *ptr);
    00076
    00077
    00078 #ifndef WIN32
    00079 void main_cleanup_childs(int sign);
    00080 #endif
    00081
    00082
    00086 void printusage()
    00087 {
    00088     char *usagetext =
    00089     "USAGE:\n"
    00090     " "  PROGRAM_NAME " [-b <address>] [-p <port>] [-6] [-l <host_list>] [-a <host,port>]\n"
    00091     "        [-n] [-v] [-d] [-s <file>] [-f <file>]\n"
    00092     "  -b <address>: the address to bind to (either numeric or literal).\n"
    00093     "                Default: it binds to all local IPv4 addresses\n"
    00094     "  -p <port>: the port to bind to. Default: it binds to port " RPCAP_DEFAULT_NETPORT "\n"
    00095     "  -4: use only IPv4 (default both IPv4 and IPv6 waiting sockets are used)\n"
    00096     "  -l <host_list>: a file that keeps the list of the hosts which\n"
    00097     "                  are allowed to connect to this server (if more than one,\n"
    00098     "                  list them one per line). We suggest to use \n"
    00099     "                  literal names (instead of numeric ones) in order to avoid\n"
    00100     "                  problems with different address families\n"
    00101     "  -n: permit NULL authentication (usually used with '-l')\n"
    00102     "  -a <host, port>: run in active mode when connecting to 'host' on port 'port'\n"
    00103     "  -v: run in active mode only (default: if '-a' is specified, it accepts passive\n"
    00104     "      connections as well\n"
    00105     "  -d: run in daemon mode (UNIX only) or as a service (Win32 only)\n"
    00106     "      Warning (Win32): this switch is provided automatically when the service\n"
    00107     "      is started from the control panel\n"
    00108     "  -s <file>: save the current configuration to file\n"
    00109     "  -f <file>: load the current configuration from file; all the switches\n"
    00110     "             specified from the command line are ignored\n"
    00111    "  -h: print this help screen\n\n";
    00112
    00113     printf(usagetext);
    00114 }
    00115
    00116
    00117
    00119 int main(int argc, char *argv[], char *envp[])
    00120 {
    00121 char savefile[MAX_LINE + 1];        // name of the file on which we have to save the configuration
    00122 int isdaemon= 0;                    // Not null if the user wants to run this program as a daemon
    00123 int retval;                         // keeps the returning value from several functions
    00124 char errbuf[PCAP_ERRBUF_SIZE + 1];  // keeps the error string, prior to be printed
    00125
    00126
    00127     savefile[0]= 0;
    00128     loadfile[0]= 0;
    00129     hostlist[0]= 0;
    00130
    00131     // Initialize errbuf
    00132     memset(errbuf, 0, sizeof(errbuf) );
    00133
    00134     if (sock_init(errbuf, PCAP_ERRBUF_SIZE) == -1)
    00135     {
    00136         SOCK_ASSERT(errbuf, 1);
    00137         exit(-1);
    00138     }
    00139
    00140     strncpy(address, RPCAP_DEFAULT_NETADDR, MAX_LINE);
    00141     strncpy(port, RPCAP_DEFAULT_NETPORT, MAX_LINE);
    00142
    00143     // Prepare to open a new server socket
    00144     memset(&mainhints, 0, sizeof(struct addrinfo));
    00145
    00146     mainhints.ai_family = PF_UNSPEC;
    00147     mainhints.ai_flags = AI_PASSIVE;    // Ready to a bind() socket
    00148     mainhints.ai_socktype = SOCK_STREAM;
    00149
    00150     // Getting the proper command line options
    00151     while ((retval = getopt(argc, argv, "b:dhp:4l:na:s:f:v")) != -1)
    00152     {
    00153         switch (retval)
    00154         {
    00155             case 'b':
    00156                 strncpy(address, optarg, MAX_LINE);
    00157                 break;
    00158             case 'p':
    00159                 strncpy(port, optarg, MAX_LINE);
    00160                 break;
    00161             case '4':
    00162                 mainhints.ai_family = PF_INET;      // IPv4 server only
    00163                 break;
    00164             case 'd':
    00165                 isdaemon= 1;
    00166                 break;
    00167             case 'n':
    00168                 nullAuthAllowed= 1;
    00169                 break;
    00170             case 'v':
    00171                 passivemode= 0;
    00172                 break;
    00173             case 'l':
    00174             {
    00175                 strncpy(hostlist, optarg, sizeof(hostlist) );
    00176                 break;
    00177             }
    00178             case 'a':
    00179             {
    00180             char *tmpaddress, *tmpport;
    00181             int i= 0;
    00182
    00183                 tmpaddress= strtok(optarg, RPCAP_HOSTLIST_SEP);
    00184
    00185                 while ( (tmpaddress != NULL) && (i < MAX_ACTIVE_LIST) )
    00186                 {
    00187                     tmpport= strtok(NULL, RPCAP_HOSTLIST_SEP);
    00188
    00189                     snprintf(activelist[i].address, MAX_LINE, tmpaddress);
    00190
    00191                     if ( (tmpport == NULL) || (strcmp(tmpport, "DEFAULT") == 0) ) // the user choose a custom port
    00192                         snprintf(activelist[i].port, MAX_LINE, RPCAP_DEFAULT_NETPORT_ACTIVE);
    00193                     else
    00194                         snprintf(activelist[i].port, MAX_LINE, tmpport);
    00195
    00196                     tmpaddress = strtok(NULL, RPCAP_HOSTLIST_SEP);
    00197
    00198                     i++;
    00199                 }
    00200
    00201                 if (i > MAX_ACTIVE_LIST)
    00202                     SOCK_ASSERT("Only MAX_ACTIVE_LIST active connections are currently supported.", 1);
    00203
    00204                 // I don't initialize the remaining part of the structure, since
    00205                 // it is already zeroed (it is a global var)
    00206                 break;
    00207             }
    00208             case 'f':
    00209                 strncpy(loadfile, optarg, MAX_LINE);
    00210                 break;
    00211             case 's':
    00212                 strncpy(savefile, optarg, MAX_LINE);
    00213                 break;
    00214             case 'h':
    00215                 printusage();
    00216                 exit(0);
    00217             default:
    00218                 break;
    00219         }
    00220     }
    00221
    00222     if (savefile[0])
    00223     {
    00224         if (fileconf_save(savefile) )
    00225             SOCK_ASSERT("Error when saving the configuration to file", 1);
    00226     }
    00227
    00228     // If the file does not exist, it keeps the settings provided by the command line
    00229     if (loadfile[0])
    00230         fileconf_read(0);
    00231
    00232 #ifdef linux
    00233     // SIGTERM (i.e. kill -15) is not generated in WIN32, although it is included for ANSI compatibility
    00234     signal(SIGTERM, main_cleanup);
    00235     signal(SIGCHLD, main_cleanup_childs);
    00236 #endif
    00237
    00238     // forking a daemon, if it is needed
    00239     if (isdaemon)
    00240     {
    00241     #ifndef WIN32
    00242     int pid;
    00243
    00244         // Unix Network Programming, pg 336
    00245         if ( (pid = fork() ) != 0)
    00246             exit(0);        // Parent terminates
    00247
    00248         // First child continues
    00249         // Set daemon mode
    00250         setsid();
    00251
    00252         // generated under unix with 'kill -HUP', needed to reload the configuration
    00253         signal(SIGHUP, fileconf_read);
    00254
    00255         if ( (pid = fork() ) != 0)
    00256             exit(0);        // First child terminates
    00257
    00258         // LINUX WARNING: the current linux implementation of pthreads requires a management thread
    00259         // to handle some hidden stuff. So, as soon as you create the first thread, two threads are
    00260         // created. Fom this point on, the number of threads active are always one more compared
    00261         // to the number you're expecting
    00262
    00263         // Second child continues
    00264 //      umask(0);
    00265 //      chdir("/");
    00266     #else
    00267         // We use the SIGABRT signal to kill the Win32 service
    00268         signal(SIGABRT, main_cleanup);
    00269
    00270         // If this call succeeds, it is blocking on Win32
    00271         if ( svc_start() != 1)
    00272             SOCK_ASSERT(1, "Unable to start the service");
    00273
    00274         // When the previous call returns, the entire application has to be stopped.
    00275         exit(0);
    00276     #endif
    00277     }
    00278     else    // Console mode
    00279     {
    00280         // Enable the catching of Ctrl+C
    00281         signal(SIGINT, main_cleanup);
    00282
    00283 #ifndef WIN32
    00284         // generated under unix with 'kill -HUP', needed to reload the configuration
    00285         // We do not have this kind of signal in Win32
    00286         signal(SIGHUP, fileconf_read);
    00287 #endif
    00288
    00289         printf("Press CTRL + C to stop the server...\n");
    00290     }
    00291
    00292     // If we're a Win32 service, we have already called this function in the service_main
    00293     main_startup();
    00294
    00295     // The code should never arrive here (since the main_startup is blocking)
    00296     //  however this avoids a compiler warning
    00297     exit(0);
    00298 }
    00299
    00300
    00301
    00302 void main_startup(void)
    00303 {
    00304 char errbuf[PCAP_ERRBUF_SIZE + 1];  // keeps the error string, prior to be printed
    00305 struct addrinfo *addrinfo;              // keeps the addrinfo chain; required to open a new socket
    00306 int i;
    00307 #ifdef WIN32
    00308     pthread_t threadId;                 // Pthread variable that keeps the thread structures
    00309 #else
    00310     pid_t pid;
    00311 #endif
    00312
    00313     i= 0;
    00314     addrinfo= NULL;
    00315     memset(errbuf, 0, sizeof(errbuf) );
    00316
    00317     // Starts all the active threads
    00318     while ( (activelist[i].address[0] != 0) && (i < MAX_ACTIVE_LIST) )
    00319     {
    00320         activelist[i].ai_family= mainhints.ai_family;
    00321
    00322 #ifdef WIN32
    00323         if ( pthread_create( &threadId, NULL, (void *) &main_active, (void *) &activelist[i]) )
    00324         {
    00325             SOCK_ASSERT("Error creating the active child thread", 1);
    00326             continue;
    00327         }
    00328 #else
    00329         if ( (pid= fork() ) == 0)   // I am the child
    00330         {
    00331             main_active( (void *) &activelist[i]);
    00332             exit(0);
    00333         }
    00334 #endif
    00335         i++;
    00336     }
    00337
    00338     /*
    00339         The code that manages the active connections is not blocking;
    00340         vice versa, the code that manages the passive connection is blocking.
    00341         So, if the user do not want to run in passive mode, we have to block
    00342         the main thread here, otherwise the program ends and all threads
    00343         are stopped.
    00344
    00345         WARNING: this means that in case we have only active mode, the program does
    00346         not terminate even if all the child thread terminates. The user has always to
    00347         press Ctrl+C (or send a SIGTERM) to terminate the program.
    00348     */
    00349
    00350     if (passivemode)
    00351     {
    00352     struct addrinfo *tempaddrinfo;
    00353
    00354         // Do the work
    00355         if (sock_initaddress((address[0]) ? address : NULL, port, &mainhints, &addrinfo, errbuf, PCAP_ERRBUF_SIZE) == -1)
    00356         {
    00357             SOCK_ASSERT(errbuf, 1);
    00358             return;
    00359         }
    00360
    00361         tempaddrinfo= addrinfo;
    00362
    00363         while (tempaddrinfo)
    00364         {
    00365             if ( (sockmain= sock_open(tempaddrinfo, SOCKOPEN_SERVER, SOCKET_MAXCONN, errbuf, PCAP_ERRBUF_SIZE)) == -1)
    00366             {
    00367                 SOCK_ASSERT(errbuf, 1);
    00368                 tempaddrinfo= tempaddrinfo->ai_next;
    00369                 continue;
    00370             }
    00371
    00372 #ifdef WIN32
    00373             if ( pthread_create( &threadId, NULL, (void *) &main_passive, (void *) &sockmain ) )
    00374             {
    00375                 SOCK_ASSERT("Error creating the passive child thread", 1);
    00376                 continue;
    00377             }
    00378 #else
    00379             if ( (pid= fork() ) == 0)   // I am the child
    00380             {
    00381                 main_passive( (void *) &sockmain);
    00382                 return;
    00383             }
    00384 #endif
    00385             tempaddrinfo= tempaddrinfo->ai_next;
    00386         }
    00387
    00388         freeaddrinfo(addrinfo);
    00389     }
    00390
    00391     // All the previous calls are no blocking, so the main line of execution goes here
    00392     // and I have to avoid that the program terminates
    00393     while (1)
    00394         pthread_suspend(10*60*1000); // it wakes up every 10 minutes; it seems to me reasonable
    00395 }
    00396
    00397
    00398 /*
    00399     \brief Closes gracefully (more or less) the program.
    00400
    00401     This function is called:
    00402     - when we're running in console
    00403     - when we're running as a Win32 service (in case we press STOP)
    00404
    00405     It is not called when we are running as a daemon on UNIX, since
    00406     we do not define a signal in order to terminate gracefully the daemon.
    00407
    00408     This function makes a fast cleanup (it does not clean everything, as
    00409     you can see from the fact that it uses kill() on UNIX), closes
    00410     the main socket, free winsock resources (on Win32) and exits the
    00411     program.
    00412 */
    00413 void main_cleanup(int sign)
    00414 {
    00415 #ifndef WIN32
    00416     // Sends a KILL signal to all the processes
    00417     // that share the same process group (i.e. kills all the childs)
    00418     kill(0, SIGKILL);
    00419 #endif
    00420
    00421     SOCK_ASSERT(PROGRAM_NAME " is closing.\n", 1);
    00422
    00423     if (sockmain)
    00424         closesocket(sockmain);
    00425     sock_cleanup();
    00426
    00427     /*
    00428         This code is executed under the following conditions:
    00429         - SIGTERM: we're under UNIX, and the user kills us with 'kill -15'
    00430         (no matter is we're a daemon or in a console mode)
    00431         - SIGINT: we're in console mode and the user sends us a Ctrl+C
    00432         (SIGINT signal), no matter if we're UNIX or Win32
    00433
    00434         In all these cases, we have to terminate the program.
    00435         The case that still remains is if we're a Win32 service: in this case,
    00436         we're a child thread, and we want just to terminate ourself. This is because
    00437         the exit(0) will be invoked by the main thread, which is blocked waiting that
    00438         all childs terminates. We are forced to call exit from the main thread otherwise
    00439         the Win32 service control manager (SCM) does not work well.
    00440     */
    00441     if ( (sign == SIGTERM) || (sign == SIGINT) )
    00442         exit(0);
    00443     else
    00444         return;
    00445 }
    00446
    00447
    00448
    00449 #ifdef linux
    00450
    00451 void main_cleanup_childs(int sign)
    00452 {
    00453 pid_t pid;
    00454 int stat;
    00455
    00456     // For reference, Stevens, pg 128
    00457
    00458     while ( (pid= waitpid(-1, &stat, WNOHANG) ) > 0)
    00459         SOCK_ASSERT("Child terminated", 1);
    00460
    00461     return;
    00462 }
    00463
    00464 #endif
    00465
    00466
    00467
    00468
    00469
    00483 void main_passive(void *ptr)
    00484 {
    00485 char fakeerrbuf[PCAP_ERRBUF_SIZE + 1];  // needed to keep the message due to an error that we want to discard.
    00486 char errbuf[PCAP_ERRBUF_SIZE + 1];  // keeps the error string, prior to be printed
    00487 SOCKET sockctrl;                // keeps the socket ID for this control connection
    00488 struct sockaddr_storage from;   // generic sockaddr_storage variable
    00489 socklen_t fromlen;              // keeps the length of the sockaddr_storage variable
    00490 SOCKET sockmain;
    00491
    00492 #ifndef WIN32
    00493     pid_t pid;
    00494 #endif
    00495
    00496     sockmain= *((SOCKET *) ptr);
    00497     // Initialize errbuf
    00498     memset(errbuf, 0, sizeof(errbuf) );
    00499
    00500     // main thread loop
    00501     while (1)
    00502     {
    00503     pthread_t threadId;                 // Pthread variable that keeps the thread structures
    00504     struct daemon_slpars *pars;         // parameters needed by the daemon_serviceloop()
    00505
    00506         // Connection creation
    00507         fromlen = sizeof(struct sockaddr_storage);
    00508
    00509         sockctrl= accept(sockmain, (struct sockaddr *) &from, &fromlen);
    00510
    00511         if (sockctrl == -1)
    00512         {
    00513             // The accept() call can return this error when a signal is catched
    00514             // In this case, we have simply to ignore this error code
    00515             // Stevens, pg 124
    00516 #ifdef WIN32
    00517             if (WSAGetLastError() == WSAEINTR)
    00518 #else
    00519             if (errno == EINTR)
    00520 #endif
    00521                 continue;
    00522
    00523             // Don't check for errors here, since the error can be due to the fact that the thread
    00524             // has been killed
    00525             sock_geterror("accept(): ", errbuf, PCAP_ERRBUF_SIZE);
    00526             SOCK_ASSERT(errbuf, 1);
    00527             continue;
    00528         }
    00529
    00530         // checks if the connecting host is among the ones allowed
    00531         if (sock_check_hostlist(hostlist, RPCAP_HOSTLIST_SEP, &from, errbuf, PCAP_ERRBUF_SIZE) < 0 )
    00532         {
    00533             rpcap_senderror(sockctrl, errbuf, PCAP_ERR_HOSTNOAUTH, fakeerrbuf);
    00534             sock_close(sockctrl, fakeerrbuf, PCAP_ERRBUF_SIZE);
    00535             continue;
    00536         }
    00537
    00538
    00539 #ifdef WIN32
    00540         // in case of passive mode, this variable is deallocated by the daemon_serviceloop()
    00541         pars= (struct daemon_slpars *) malloc ( sizeof(struct daemon_slpars) );
    00542         if (pars == NULL)
    00543         {
    00544             snprintf(errbuf, PCAP_ERRBUF_SIZE, "malloc() failed: %s", pcap_strerror(errno));
    00545             continue;
    00546         }
    00547
    00548         pars->sockctrl= sockctrl;
    00549         pars->activeclose= 0;       // useless in passive mode
    00550         pars->isactive= 0;
    00551         pars->nullAuthAllowed= nullAuthAllowed;
    00552
    00553         if ( pthread_create( &threadId, NULL, (void *) &daemon_serviceloop, (void *) pars) )
    00554         {
    00555             SOCK_ASSERT("Error creating the child thread", 1);
    00556             continue;
    00557         }
    00558
    00559 #else
    00560         if ( (pid= fork() ) == 0)   // I am the child
    00561         {
    00562             // in case of passive mode, this variable is deallocated by the daemon_serviceloop()
    00563             pars= (struct daemon_slpars *) malloc ( sizeof(struct daemon_slpars) );
    00564             if (pars == NULL)
    00565             {
    00566                 snprintf(errbuf, PCAP_ERRBUF_SIZE, "malloc() failed: %s", pcap_strerror(errno));
    00567                 exit(0);
    00568             }
    00569
    00570             pars->sockctrl= sockctrl;
    00571             pars->activeclose= 0;       // useless in passive mode
    00572             pars->isactive= 0;
    00573             pars->nullAuthAllowed= nullAuthAllowed;
    00574
    00575             // Close the main socket (must be open only in the parent)
    00576             closesocket(sockmain);
    00577
    00578             daemon_serviceloop( (void *) pars);
    00579             exit(0);
    00580         }
    00581
    00582         // I am the parent
    00583         // Close the childsocket (must be open only in the child)
    00584         closesocket(sockctrl);
    00585 #endif
    00586
    00587         // loop forever, until interrupted
    00588     }
    00589 }
    00590
    00591
    00592
    00593
    00604 void main_active(void *ptr)
    00605 {
    00606 char errbuf[PCAP_ERRBUF_SIZE + 1];  // keeps the error string, prior to be printed
    00607 SOCKET sockctrl;                    // keeps the socket ID for this control connection
    00608 struct addrinfo hints;              // temporary struct to keep settings needed to open the new socket
    00609 struct addrinfo *addrinfo;          // keeps the addrinfo chain; required to open a new socket
    00610 struct active_pars *activepars;
    00611 struct daemon_slpars *pars;         // parameters needed by the daemon_serviceloop()
    00612
    00613
    00614     activepars= (struct active_pars *) ptr;
    00615
    00616     // Prepare to open a new server socket
    00617     memset(&hints, 0, sizeof(struct addrinfo));
    00618                                     // WARNING Currently it supports only ONE socket family among IPv4 and IPv6
    00619     hints.ai_family = AF_INET;      // PF_UNSPEC to have both IPv4 and IPv6 server
    00620     hints.ai_socktype = SOCK_STREAM;
    00621     hints.ai_family= activepars->ai_family;
    00622
    00623     snprintf(errbuf, PCAP_ERRBUF_SIZE, "Connecting to host %s, port %s, using protocol %s",
    00624             activepars->address, activepars->port, (hints.ai_family == AF_INET) ? "IPv4":
    00625             (hints.ai_family == AF_INET6) ? "IPv6" : "Unspecified");
    00626     SOCK_ASSERT(errbuf, 1);
    00627
    00628     // Initialize errbuf
    00629     memset(errbuf, 0, sizeof(errbuf) );
    00630
    00631     // Do the work
    00632     if (sock_initaddress(activepars->address, activepars->port, &hints, &addrinfo, errbuf, PCAP_ERRBUF_SIZE) == -1)
    00633     {
    00634         SOCK_ASSERT(errbuf, 1);
    00635         return;
    00636     }
    00637
    00638     while (1)
    00639     {
    00640     int activeclose;
    00641
    00642         if ( (sockctrl= sock_open(addrinfo, SOCKOPEN_CLIENT, 0, errbuf, PCAP_ERRBUF_SIZE)) == -1)
    00643         {
    00644             SOCK_ASSERT(errbuf, 1);
    00645
    00646             snprintf(errbuf, PCAP_ERRBUF_SIZE, "Error connecting to host %s, port %s, using protocol %s",
    00647                     activepars->address, activepars->port, (hints.ai_family == AF_INET) ? "IPv4":
    00648                     (hints.ai_family == AF_INET6) ? "IPv6" : "Unspecified" );
    00649
    00650             SOCK_ASSERT(errbuf, 1);
    00651
    00652             pthread_suspend(RPCAP_ACTIVE_WAIT * 1000);
    00653
    00654             continue;
    00655         }
    00656
    00657         pars= (struct daemon_slpars *) malloc ( sizeof(struct daemon_slpars) );
    00658         if (pars == NULL)
    00659         {
    00660             snprintf(errbuf, PCAP_ERRBUF_SIZE, "malloc() failed: %s", pcap_strerror(errno));
    00661             continue;
    00662         }
    00663
    00664         pars->sockctrl= sockctrl;
    00665         pars->activeclose= 0;
    00666         pars->isactive= 1;
    00667         pars->nullAuthAllowed= nullAuthAllowed;
    00668
    00669         daemon_serviceloop( (void *) pars);
    00670
    00671         activeclose= pars->activeclose;
    00672
    00673         free(pars);
    00674
    00675         // If the connection is closed by the user explicitely, don't try to connect to it again
    00676         // just exit the program
    00677         if (activeclose == 1)
    00678             break;
    00679     }
    00680 }
    00681

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