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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) == -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'
    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         printf("Press CTRL + C to stop the server...\n");
    00284     }
    00285
    00286     // If we're a Win32 service, we have already called this function in the service_main
    00287     main_startup();
    00288
    00289     // The code should never arrive here (since the main_startup is blocking)
    00290     //  however this avoids a compiler warning
    00291     exit(0);
    00292 }
    00293
    00294
    00295
    00296 void main_startup(void)
    00297 {
    00298 char errbuf[PCAP_ERRBUF_SIZE + 1];  // keeps the error string, prior to be printed
    00299 struct addrinfo *addrinfo;              // keeps the addrinfo chain; required to open a new socket
    00300 int i;
    00301 #ifdef WIN32
    00302     pthread_t threadId;                 // Pthread variable that keeps the thread structures
    00303 #else
    00304     pid_t pid;
    00305 #endif
    00306
    00307     i= 0;
    00308     addrinfo= NULL;
    00309     memset(errbuf, 0, sizeof(errbuf) );
    00310
    00311     // Starts all the active threads
    00312     while ( (activelist[i].address[0] != 0) && (i < MAX_ACTIVE_LIST) )
    00313     {
    00314         activelist[i].ai_family= mainhints.ai_family;
    00315
    00316 #ifdef WIN32
    00317         if ( pthread_create( &threadId, NULL, (void *) &main_active, (void *) &activelist[i]) )
    00318         {
    00319             SOCK_ASSERT("Error creating the active child thread", 1);
    00320             continue;
    00321         }
    00322 #else
    00323         if ( (pid= fork() ) == 0)   // I am the child
    00324         {
    00325             main_active( (void *) &activelist[i]);
    00326             exit(0);
    00327         }
    00328 #endif
    00329         i++;
    00330     }
    00331
    00332     /*
    00333         The code that manages the active connections is not blocking;
    00334         vice versa, the code that manages the passive connection is blocking.
    00335         So, if the user do not want to run in passive mode, we have to block
    00336         the main thread here, otherwise the program ends and all threads
    00337         are stopped.
    00338
    00339         WARNING: this means that in case we have only active mode, the program does
    00340         not terminate even if all the child thread terminates. The user has always to
    00341         press Ctrl+C (or send a SIGTERM) to terminate the program.
    00342     */
    00343
    00344     if (passivemode)
    00345     {
    00346     struct addrinfo *tempaddrinfo;
    00347
    00348         // Do the work
    00349         if (sock_validaddr((address[0]) ? address : NULL, port, &mainhints, &addrinfo, errbuf) == -1)
    00350         {
    00351             SOCK_ASSERT(errbuf, 1);
    00352             return;
    00353         }
    00354
    00355         tempaddrinfo= addrinfo;
    00356
    00357         while (tempaddrinfo)
    00358         {
    00359             if ( (sockmain= sock_open(tempaddrinfo, SOCKOPEN_SERVER, SOCKET_MAXCONN, errbuf)) == -1)
    00360             {
    00361                 SOCK_ASSERT(errbuf, 1);
    00362                 tempaddrinfo= tempaddrinfo->ai_next;
    00363                 continue;
    00364             }
    00365
    00366 #ifdef WIN32
    00367             if ( pthread_create( &threadId, NULL, (void *) &main_passive, (void *) &sockmain ) )
    00368             {
    00369                 SOCK_ASSERT("Error creating the passive child thread", 1);
    00370                 continue;
    00371             }
    00372 #else
    00373             if ( (pid= fork() ) == 0)   // I am the child
    00374             {
    00375                 main_passive( (void *) &sockmain);
    00376                 return;
    00377 //              exit(0);
    00378             }
    00379 #endif
    00380 //          main_passive(sockmain);
    00381             tempaddrinfo= tempaddrinfo->ai_next;
    00382         }
    00383
    00384         freeaddrinfo(addrinfo);
    00385     }
    00386
    00387     // All the previous calls are no blocking, so the main line of execution goes here
    00388     // and I have to avoid that the program terminates
    00389     while (1)
    00390         pthread_suspend(10*60*1000); // it wakes up every 10 minutes; it seems to me reasonable
    00391 }
    00392
    00393
    00394 /*
    00395     \brief Closes gracefully (more or less) the program.
    00396
    00397     This function is called:
    00398     - when we're running in console
    00399     - when we're running as a Win32 service (in case we press STOP)
    00400
    00401     It is not called when we are running as a daemon on UNIX, since
    00402     we do not define a signal in order to terminate gracefully the daemon.
    00403
    00404     This function makes a fast cleanup (it does not clean everything, as
    00405     you can see from the fact that it uses kill() on UNIX), closes
    00406     the main socket, free winsock resources (on Win32) and exits the
    00407     program.
    00408 */
    00409 void main_cleanup(int sign)
    00410 {
    00411 #ifndef WIN32
    00412     // Sends a KILL signal to all the processes
    00413     // that share the same process group (i.e. kills all the childs)
    00414     kill(0, SIGKILL);
    00415 #endif
    00416
    00417     SOCK_ASSERT(PROGRAM_NAME " is closing.\n", 1);
    00418
    00419     if (sockmain)
    00420         closesocket(sockmain);
    00421     sock_cleanup();
    00422
    00423     /*
    00424         This code is executed under the following conditions:
    00425         - SIGTERM: we're under UNIX, and the user kills us with 'kill -15'
    00426         (no matter is we're a daemon or in a console mode)
    00427         - SIGINT: we're in console mode and the user sends us a Ctrl+C
    00428         (SIGINT signal), no matter if we're UNIX or Win32
    00429
    00430         In all these cases, we have to terminate the program.
    00431         The case that still remains is if we're a Win32 service: in this case,
    00432         we're a child thread, and we want just to terminate ourself. This is because
    00433         the exit(0) will be invoked by the main thread, which is blocked waiting that
    00434         all childs terminates. We are forced to call exit from the main thread otherwise
    00435         the Win32 service control manager (SCM) does not work well.
    00436     */
    00437     if ( (sign == SIGTERM) || (sign == SIGINT) )
    00438         exit(0);
    00439     else
    00440         return;
    00441 }
    00442
    00443
    00444
    00445 #ifdef linux
    00446
    00447 void main_cleanup_childs(int sign)
    00448 {
    00449 pid_t pid;
    00450 int stat;
    00451
    00452     // For reference, Stevens, pg 128
    00453
    00454     while ( (pid= waitpid(-1, &stat, WNOHANG) ) > 0)
    00455         SOCK_ASSERT("Child terminated", 1);
    00456
    00457     return;
    00458 }
    00459
    00460 #endif
    00461
    00462
    00463
    00464
    00465
    00478 void main_passive(void *ptr)
    00479 {
    00480 char fakeerrbuf[PCAP_ERRBUF_SIZE + 1];  // needed to keep the message due to an error that we want to discard.
    00481 char errbuf[PCAP_ERRBUF_SIZE + 1];  // keeps the error string, prior to be printed
    00482 SOCKET sockctrl;                // keeps the socket ID for this control connection
    00483 struct sockaddr_storage from;   // generic sockaddr_storage variable
    00484 socklen_t fromlen;              // keeps the length of the sockaddr_storage variable
    00485 SOCKET sockmain;
    00486
    00487 #ifdef linux
    00488     pid_t pid;
    00489 #endif
    00490
    00491     sockmain= *((SOCKET *) ptr);
    00492     // Initialize errbuf
    00493     memset(errbuf, 0, sizeof(errbuf) );
    00494
    00495     // main thread loop
    00496     while (1)
    00497     {
    00498     pthread_t threadId;                 // Pthread variable that keeps the thread structures
    00499     struct daemon_slpars *pars;         // parameters needed by the daemon_serviceloop()
    00500
    00501         // Connection creation
    00502         fromlen = sizeof(struct sockaddr_storage);
    00503
    00504         sockctrl= accept(sockmain, (struct sockaddr *) &from, &fromlen);
    00505
    00506         if (sockctrl == -1)
    00507         {
    00508             // The accept() call can return this error when a signal is catched
    00509             // In this case, we have simply to ignore this error code
    00510             // Stevens, pg 124
    00511 #ifdef WIN32
    00512             if (WSAGetLastError() == WSAEINTR)
    00513 #else
    00514             if (errno == EINTR)
    00515 #endif
    00516                 continue;
    00517
    00518             // Don't check for errors here, since the error can be due to the fact that the thread
    00519             // has been killed
    00520             sock_geterror("accept(): ", errbuf, PCAP_ERRBUF_SIZE);
    00521             SOCK_ASSERT(errbuf, 1);
    00522             continue;
    00523         }
    00524
    00525         // checks if the connecting host is among the ones allowed
    00526         if (sock_check_hostlist(hostlist, RPCAP_HOSTLIST_SEP, &from, errbuf) )
    00527         {
    00528             rpcap_senderror(sockctrl, errbuf, PCAP_ERR_HOSTNOAUTH, fakeerrbuf);
    00529             sock_close(sockctrl, fakeerrbuf);
    00530             continue;
    00531         }
    00532
    00533
    00534 #ifdef WIN32
    00535         // in case of passive mode, this variable is deallocated by the daemon_serviceloop()
    00536         pars= (struct daemon_slpars *) malloc ( sizeof(struct daemon_slpars) );
    00537         if (pars == NULL)
    00538         {
    00539             snprintf(errbuf, PCAP_ERRBUF_SIZE, "malloc() failed: %s", pcap_strerror(errno));
    00540             continue;
    00541         }
    00542
    00543         pars->sockctrl= sockctrl;
    00544         pars->activeclose= 0;       // useless in passive mode
    00545         pars->isactive= 0;
    00546         pars->nullAuthAllowed= nullAuthAllowed;
    00547
    00548         if ( pthread_create( &threadId, NULL, (void *) &daemon_serviceloop, (void *) pars) )
    00549         {
    00550             SOCK_ASSERT("Error creating the child thread", 1);
    00551             continue;
    00552         }
    00553
    00554 #else
    00555         if ( (pid= fork() ) == 0)   // I am the child
    00556         {
    00557             // in case of passive mode, this variable is deallocated by the daemon_serviceloop()
    00558             pars= (struct daemon_slpars *) malloc ( sizeof(struct daemon_slpars) );
    00559             if (pars == NULL)
    00560             {
    00561                 snprintf(errbuf, PCAP_ERRBUF_SIZE, "malloc() failed: %s", pcap_strerror(errno));
    00562                 exit(0);
    00563             }
    00564
    00565             pars->sockctrl= sockctrl;
    00566             pars->activeclose= 0;       // useless in passive mode
    00567             pars->isactive= 0;
    00568             pars->nullAuthAllowed= nullAuthAllowed;
    00569
    00570             // Close the main socket (must be open only in the parent)
    00571             closesocket(sockmain);
    00572
    00573             daemon_serviceloop( (void *) pars);
    00574             exit(0);
    00575         }
    00576
    00577         // I am the parent
    00578         // Close the childsocket (must be open only in the child)
    00579         closesocket(sockctrl);
    00580 #endif
    00581
    00582         // loop forever, until interrupted
    00583     }
    00584 }
    00585
    00586
    00587
    00588
    00596 void main_active(void *ptr)
    00597 {
    00598 char errbuf[PCAP_ERRBUF_SIZE + 1];  // keeps the error string, prior to be printed
    00599 SOCKET sockctrl;                    // keeps the socket ID for this control connection
    00600 struct addrinfo hints;              // temporary struct to keep settings needed to open the new socket
    00601 struct addrinfo *addrinfo;          // keeps the addrinfo chain; required to open a new socket
    00602 struct active_pars *activepars;
    00603 struct daemon_slpars *pars;         // parameters needed by the daemon_serviceloop()
    00604
    00605
    00606     activepars= (struct active_pars *) ptr;
    00607
    00608     // Prepare to open a new server socket
    00609     memset(&hints, 0, sizeof(struct addrinfo));
    00610                                     // WARNING Currently it supports only ONE socket family among IPv4 and IPv6
    00611     hints.ai_family = AF_INET;      // PF_UNSPEC to have both IPv4 and IPv6 server
    00612     hints.ai_socktype = SOCK_STREAM;
    00613     hints.ai_family= activepars->ai_family;
    00614
    00615     snprintf(errbuf, PCAP_ERRBUF_SIZE, "Connecting to host %s, port %s, using protocol %s",
    00616             activepars->address, activepars->port, (hints.ai_family == AF_INET) ? "IPv4": "IPv6" );
    00617     SOCK_ASSERT(errbuf, 1);
    00618
    00619     // Initialize errbuf
    00620     memset(errbuf, 0, sizeof(errbuf) );
    00621
    00622     // Do the work
    00623     if (sock_validaddr(activepars->address, activepars->port, &hints, &addrinfo, errbuf) == -1)
    00624     {
    00625         SOCK_ASSERT(errbuf, 1);
    00626         return;
    00627     }
    00628
    00629     while (1)
    00630     {
    00631     int activeclose;
    00632
    00633         if ( (sockctrl= sock_open(addrinfo, SOCKOPEN_CLIENT, 0, errbuf)) == -1)
    00634         {
    00635             SOCK_ASSERT(errbuf, 1);
    00636             snprintf(errbuf, PCAP_ERRBUF_SIZE, "Error connecting to host %s, port %s, using protocol %s",
    00637                     activepars->address, activepars->port, (hints.ai_family == AF_INET) ? "IPv4": "IPv6" );
    00638             SOCK_ASSERT(errbuf, 1);
    00639             pthread_suspend(RPCAP_ACTIVE_WAIT * 1000);
    00640             continue;
    00641         }
    00642
    00643         pars= (struct daemon_slpars *) malloc ( sizeof(struct daemon_slpars) );
    00644         if (pars == NULL)
    00645         {
    00646             snprintf(errbuf, PCAP_ERRBUF_SIZE, "malloc() failed: %s", pcap_strerror(errno));
    00647             continue;
    00648         }
    00649
    00650         pars->sockctrl= sockctrl;
    00651         pars->activeclose= 0;
    00652         pars->isactive= 1;
    00653         pars->nullAuthAllowed= nullAuthAllowed;
    00654
    00655         daemon_serviceloop( (void *) pars);
    00656
    00657         activeclose= pars->activeclose;
    00658
    00659         free(pars);
    00660         // If the connection is closed by the user explicitely, don't try to connect to it again
    00661         // just exit the program
    00662         if (activeclose == 1)
    00663             break;
    00664     }
    00665 }
    00666

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