Source File modules/sv/server.c

    1    | /***************************************
    2    |   $Revision: 1.38 $
    3    |
    4    |   Example code: A server for a client to connect to.
    5    |
    6    |   Status: NOT REVUED, NOT TESTED
    7    |
    8    |  Authors:       Chris Ottrey, Joao Damas
    9    |
    10   |   +html+ <DL COMPACT>
    11   |   +html+ <DT>Online References:
    12   |   +html+ <DD><UL>
    13   |   +html+   <LI>Based on <A HREF="http://iii.ripe.net/dbase/coding/new.code/progress/ottrey/code/java/src/DBServer.java">DBServer.java</A>
    14   |   +html+ </UL>
    15   |   +html+ </DL>
    16   |
    17   |   ******************/ /******************
    18   |   Modification History:
    19   |         ottrey (02/03/1999) Created.
    20   |         ottrey (08/03/1999) Modified.
    21   |         joao   (22/06/1999) Modified.
    22   |   ******************/ /******************
    23   |   Copyright (c) 1999                              RIPE NCC
    24   |
    25   |   All Rights Reserved
    26   |
    27   |   Permission to use, copy, modify, and distribute this software and its
    28   |   documentation for any purpose and without fee is hereby granted,
    29   |   provided that the above copyright notice appear in all copies and that
    30   |   both that copyright notice and this permission notice appear in
    31   |   supporting documentation, and that the name of the author not be
    32   |   used in advertising or publicity pertaining to distribution of the
    33   |   software without specific, written prior permission.
    34   |
    35   |   THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
    36   |   ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS; IN NO EVENT SHALL
    37   |   AUTHOR BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY
    38   |   DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
    39   |   AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
    40   |   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
    41   |  ***************************************/
    42   | #include <sys/socket.h>
    43   | #include <netinet/in.h>
    44   |
    45   | #include <sys/wait.h>
    46   | #include <ctype.h>
    47   |
    48   | #include <sys/types.h>
    49   | #include <sys/stat.h>
    50   |
    51   | #include "thread.h"
    52   | #include "rxroutines.h"
    53   | #include "socket.h"
    54   | /*
    55   | #include "objects.h"
    56   | */
    57   | #include "constants.h"
    58   |
    59   | #include "ca_configFns.h"
    60   | #include "ca_dictSyms.h"
    61   | #include "ca_macros.h"
    62   | #include "ca_srcAttribs.h"
    63   |
    64   | #include "mysql_driver.h"
    65   | #include "access_control.h"
    66   | #include "ud.h"
    67   | #include "server.h"
    68   |
    69   | #include "rp.h"
    70   | #include "memwrap.h"
    71   |
    72   | #include "ta.h"
    73   |
    74   | #define RIPE_REG 17
    75   |
    76   | /*+ String sizes +*/
    77   | #define STR_S   63
    78   | #define STR_M   255
    79   | #define STR_L   1023
    80   | #define STR_XL  4095
    81   | #define STR_XXL 16383
    82   |
    83   |
    84   | /* Storage for descriptors of the read side of the pipe */
    85   | int sv_lockfd[MAX_LOCKS];
    86   |
    87   | /* Listening sockets */
    88   | int SV_whois_sock;
    89   | int SV_config_sock;
    90   | int SV_mirror_sock;
    91   |
    92   | /* each updatable source has its own update thread and its own socket */
    93   | #define MAX_SOURCES 100
    94   | int SV_update_sock[MAX_SOURCES];
    95   |
    96   | /*+ Mutex lock.  Used for synchronizing changes. +*/
    97   | pthread_mutex_t   Whois_thread_count_lock;
    98   | pthread_mutex_t   Config_thread_count_lock;
    99   | pthread_mutex_t   Mirror_thread_count_lock;
    100  |
    101  | /*+ The number of threads. +*/
    102  | int       Whois_thread_count;
    103  | int       Config_thread_count;
    104  | int       Mirror_thread_count;
    105  |
    106  |
    107  | /*+ Server starting time +*/
    108  | time_t SV_starttime;
    109  |
    110  | /* pthread_mutex_t radix_initializing_lock; */
    111  | /* XXX this is a workaround of a problem with mysql - it prevents the
    112  | update/nrtm threads from starting before the radix tree is loaded.
    113  |
    114  | Apparently, even LOCK TABLES doesn't prevent the program from locking up
    115  | */
    116  |
    117  | static void do_watchdog(void *arg);
    118  |
    119  | /* Logging results */
    120  | static void log_print(const char *arg) {
    121  |
    122  |   printf(arg);
    123  |
    124  | } /* log_print() */
    125  |
    126  |
    127  | void radix_init(void){
    128  |   int i;
    129  |   ca_dbSource_t *source_hdl;
    130  |
    131  |   wr_log_set(0);
    132  |   /* this needs to be done in two loops,
    133  |      because the trees must be created asap (first loop)
    134  |      and then locked until they are populated in the second loop
    135  |   */
    136  |
    137  |   for(i=0; (source_hdl = ca_get_SourceHandleByPosition(i))!=NULL ; i++){
    138  |     dieif( RP_init_trees( source_hdl ) != RP_OK );
    139  |   }
    140  |
    141  |   for(i=0; (source_hdl = ca_get_SourceHandleByPosition(i))!=NULL ; i++){
    142  |     dieif( RP_sql_load_reg( source_hdl ) != RP_OK );
    143  |   }
    144  |
    145  | #if 0
    146  |   {
    147  |       er_path_t erlogstr;
    148  |
    149  |       erlogstr.fdes = stdout;
    150  |       erlogstr.asp  = ASP_SK_GEN; /* 0xfffff000; */
    151  |       erlogstr.fac  = FAC_SK;
    152  |       erlogstr.sev  = ER_SEV_D;
    153  |       erlogstr.mode = ER_M_SEVCHAR | ER_M_FACSYMB | ER_M_TEXTLONG | ER_M_THR_ID;
    154  |
    155  |       ER_setpath(& erlogstr);
    156  |   }
    157  | #endif
    158  |   wr_log_set(0); /* switch on/off the memory leak detector */
    159  | /*  pthread_mutex_unlock( &radix_initializing_lock );  */
    160  |
    161  |   pthread_exit((void *)0);
    162  | }
    163  |
    164  | /* main_loop() */
    165  | /*++++++++++++++++++++++++++++++++++++++
    166  |
    167  |   Waits for an incoming connection on the and spawns a new thread to handle it.
    168  |
    169  |   void *arg Pointer to a struct containing the socket to talk to the client and
    170  |             the function to call depending on the incoming connection.
    171  |
    172  |   More:
    173  |   +html+ <PRE>
    174  |   Author:
    175  |         ottrey
    176  | 	joao
    177  | 	andrei (do_server)
    178  |   +html+ </PRE>
    179  |   ++++++++++++++++++++++++++++++++++++++*/
    180  | static void  *main_loop(void *arg) {
    181  |   th_args *args = (th_args *)arg;
    182  |   int connected_socket;
    183  |   int do_server;
    184  |
    185  |   while(do_server=CO_get_do_server()) {
    186  |
    187  |     connected_socket = SK_accept_connection(args->sock);
    188  |     if(connected_socket==-1) break;
    189  |
    190  |
    191  |     ER_dbg_va(FAC_TH, ASP_TH_NEW, "Starting a new thread");
    192  |
    193  |     /* Start a new thread. */
    194  |
    195  |
    196  |     TH_create((void *(*)(void *))(args->function), (void *)connected_socket);
    197  | //
    198  | //    pthread_attr_init(&attr);    /* initialize attr with default attributes */
    199  | //    pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
    200  | //    pthread_create(&tid, &attr, (void *(*)(void *))(args->function), (void *)connected_socket);
    201  |   }
    202  |
    203  |    ER_dbg_va(FAC_TH, ASP_TH_NEW, "Exiting from the main loop");
    204  |
    205  | } /* main_loop() */
    206  |
    207  |
    208  | /* SV_start() */
    209  | /*++++++++++++++++++++++++++++++++++++++
    210  |
    211  |   Start the server.
    212  |
    213  |   More:
    214  |   +html+ <PRE>
    215  |   Authors:
    216  |         ottrey
    217  |         joao
    218  |   +html+ </PRE>
    219  |   +html+ Starts up the server.
    220  |   +html+ <OL>
    221  |   +html+   <LI> Create sockets on the necessary ports (whois, config and mirror)
    222  |   +html+   <LI> Start new threads for each service.
    223  |   +html+ </OL>
    224  |   +html+ <A HREF=".DBrc">.properties</A>
    225  |
    226  |   ++++++++++++++++++++++++++++++++++++++*/
    227  | void SV_start() {
    228  |   /* Make listening sockets global variables  */
    229  |   /*  int whois_sock,config_sock,mirror_sock,update_sock; */
    230  |   /* uint32_t whois_addr,sock_addr,mirror_addr; */
    231  |   int whois_port = -1;
    232  |   int config_port = -1;
    233  |   int mirror_port = -1;
    234  |   int update_port = -1;
    235  |   int update_mode = 0;
    236  |   sigset_t sset;
    237  |   int fdes[2];
    238  |   struct timeval tval;
    239  |   ca_dbSource_t *source_hdl;
    240  |   char *source_name;
    241  |   int source;
    242  |
    243  |   /* Store the starting time */
    244  |   gettimeofday(&tval, NULL);
    245  |   SV_starttime = tval.tv_sec;/* seconds since Jan. 1, 1970 */
    246  |
    247  |   /* Create interrupt pipe */
    248  |   /* Writing to this pipe will cause sleeping threads */
    249  |   /* to wake up */
    250  |   fprintf(stderr, "Creating an interrupt pipe\n");
    251  |   if(pipe(fdes)==-1) {
    252  |    printf("Cannot open interrupt pipe\n");
    253  |    exit(-1);
    254  |   }
    255  |   /* Save the pipe descriptors in sv_lock array */
    256  |   sv_lockfd[WLOCK_SHTDOWN]=fdes[0];
    257  |   sv_lockfd[LOCK_SHTDOWN]=fdes[1];
    258  |
    259  |   /* Initialise modules */
    260  |   SK_init();
    261  |
    262  |   /* Initialise the access control list. */
    263  |   AC_build();
    264  |   AC_acc_load();
    265  |   /* explicitly start the decay thread */
    266  |   TH_create((void *(*)(void *))AC_decay, NULL);
    267  |
    268  |   /* Initialise the radix tree (separate thread[s])
    269  |      already can allow socket connections, because the trees will
    270  |      be created locked, and will be unlocked when loaded */
    271  |
    272  | /*   pthread_mutex_lock( &radix_initializing_lock );  */
    273  |   TH_create((void *(*)(void *))radix_init, NULL);
    274  | /*  pthread_mutex_lock( &radix_initializing_lock );  */
    275  |
    276  |
    277  |   /* XXX I have no idea how this is working!! It's wrong! - ottrey 30/7/99 */
    278  |   /* Get port information for each service */
    279  |   whois_port = SK_atoport(CO_get_whois_port(), "tcp");
    280  |   printf("XXX htons(whois_port)=%d\n", htons(whois_port));
    281  |   if(whois_port == -1) {
    282  |     printf("Invalid service/port: %d\n", htons(whois_port));
    283  |     exit(-1);
    284  |   }
    285  |
    286  |   /* XXX I have no idea how this is working!! It's wrong! - ottrey 30/7/99 */
    287  |   config_port = SK_atoport(CO_get_config_port(), "tcp");
    288  |   printf("XXX htons(config_port)=%d\n", htons(config_port));
    289  |   if(config_port == -1) {
    290  |     printf("Invalid service/port: %d\n", htons(config_port));
    291  |     exit(-1);
    292  |   }
    293  |   mirror_port = SK_atoport(CO_get_mirror_port(), "tcp");
    294  |   printf("XXX htons(mirror_port)=%d\n", htons(mirror_port));
    295  |   if(mirror_port == -1) {
    296  |     printf("Invalid service/port: %d\n", mirror_port);
    297  |     exit(-1);
    298  |   }
    299  |
    300  |   /* XXX I have no idea how this is working!! It's wrong! - ottrey 30/7/99 */
    301  | /*  update_port = SK_atoport(CO_get_update_port(), "tcp"); */
    302  | /*  printf("XXX htons(update_port)=%d\n", htons(update_port)); */
    303  | /*  if(update_port == -1) { */
    304  | /*    printf("Invalid service/port: %d\n", htons(update_port)); */
    305  | /*    exit(-1); */
    306  | /*  } */
    307  |
    308  |
    309  |
    310  |   /* 6. Create a socket on the necessary ports/addresses and bind to them. */
    311  |   /* whois socket */
    312  |   SV_whois_sock = SK_getsock(SOCK_STREAM, whois_port, INADDR_ANY);
    313  | /* Currently binds to INADDR_ANY. Will need to get specific address */
    314  | /*  SV_whois_sock = SK_getsock(SOCK_STREAM,whois_port,whois_addr); */
    315  |   /* config interface socket */
    316  |   SV_config_sock = SK_getsock(SOCK_STREAM, config_port, INADDR_ANY);
    317  |   /* nrt socket */
    318  |   SV_mirror_sock = SK_getsock(SOCK_STREAM,mirror_port,INADDR_ANY);
    319  |
    320  |
    321  |
    322  |   /* update interface socket */
    323  |   /* we need first to create and bind all of them */
    324  |   /* so that in case of failure we do not start any */
    325  |   /* update thread */
    326  |   for(source=0; (source_hdl = ca_get_SourceHandleByPosition(source))!=NULL ; source++){
    327  |      update_mode = ca_get_srcmode(source_hdl);
    328  |      if(IS_UPDATE(update_mode)) {
    329  |        /* update_port = SK_atoport(CO_get_update_port(), "tcp"); */
    330  |        update_port = htons(ca_get_srcupdateport(source_hdl));
    331  |        printf("XXX htons(update_port)=%d\n", htons(update_port));
    332  |        /* XXX ask AMRM to change the name of the function */
    333  |
    334  |        SV_update_sock[source] = SK_getsock(SOCK_STREAM, update_port, INADDR_ANY);
    335  |      }
    336  |      else SV_update_sock[source] = 0;
    337  |   }
    338  |   SV_update_sock[source+1]=-1; /* end of socket array */
    339  |
    340  |   /* Now.... accept() calls block until they get a connection
    341  |      so to listen on more than one port we need more
    342  |      than one thread */
    343  |
    344  |   /* Create master thread for whois threads */
    345  |    SV_concurrent_server(SV_whois_sock, SV_do_whois);
    346  |
    347  |   /* Create master thread for config threads */
    348  |    SV_concurrent_server(SV_config_sock, SV_do_config);
    349  |   /* Create master thread for mirror threads */
    350  |    SV_concurrent_server(SV_mirror_sock, SV_do_mirror);
    351  |
    352  | /* Walk through the sources and */
    353  | /* run update thread for every source with CANUPD == 'y' */
    354  |
    355  |    for(source=0; (source_hdl = ca_get_SourceHandleByPosition(source))!=NULL ; source++){
    356  |      update_mode = ca_get_srcmode(source_hdl);
    357  |      source_name= ca_get_srcname(source_hdl);
    358  |
    359  |      if(IS_UPDATE(update_mode)) {
    360  |      /* run RIPupdate thread */
    361  |        fprintf(stderr,"Source [%s] Mode UPDATE\n", source_name);
    362  |        TH_create((void *(*)(void *))UD_do_updates, (void *)source);
    363  |      }
    364  |      else {
    365  |        /* start NRTM client */
    366  |        fprintf(stderr,"Source [%s] Mode NRTM\n", source_name);
    367  |        TH_create((void *(*)(void *))UD_do_nrtm, (void *)source);
    368  |      }
    369  |      free(source_name); /* because ca_* functions return copies */
    370  |    }
    371  |
    372  |
    373  |
    374  |   /* XXX Is this needed? */
    375  |   pthread_exit(NULL);
    376  |
    377  | } /* SV_start() */
    378  |
    379  | /* SV_shutdown() */
    380  | /*++++++++++++++++++++++++++++++++++++++
    381  |
    382  |   Shutdown the server.
    383  |
    384  |   More:
    385  |   +html+ <PRE>
    386  |   Authors:
    387  |         andrei
    388  |   +html+ </PRE>
    389  |   +html+ Stops the server.
    390  |   +html+ <OL>
    391  |   +html+   <LI> Close listening sockets (whois, config, mirror and updates)
    392  |   +html+   <LI> Stop all threads by triggering do_server variable.
    393  |   +html+ </OL>
    394  |   +html+ <A HREF=".DBrc">.properties</A>
    395  |
    396  |   ++++++++++++++++++++++++++++++++++++++*/
    397  | void SV_shutdown() {
    398  | char print_buf[STR_M];
    399  | int source;
    400  |
    401  |  sprintf(print_buf, "%d", 0);
    402  |  /* Stop updates */
    403  |  CO_set_const("UD.do_update", print_buf);
    404  |  /* Stop all servers */
    405  |  CO_set_const("SV.do_server", print_buf);
    406  |  sprintf(print_buf, "Stopping all servers\n");
    407  |  fprintf(stderr, print_buf);
    408  |  /*log_print(print_buf); */
    409  |  strcpy(print_buf, "");
    410  |
    411  |  /* Wake up all sleeping threads */
    412  |  fprintf(stderr, "Going to wake sleeping threads up\n");
    413  |  write(sv_lockfd[WLOCK_SHTDOWN], " ", 1);
    414  |
    415  |  /* CLose all listening sockets, so accept call exits */
    416  |  close(SV_whois_sock);
    417  |  close(SV_config_sock);
    418  |  close(SV_mirror_sock);
    419  |  for (source=0; SV_update_sock[source]!=-1; source++)
    420  | 	 if(SV_update_sock[source]!=0)close(SV_update_sock[source]);
    421  |
    422  |
    423  | } /* SV_shutdown() */
    424  |
    425  |
    426  | /* SV_sleep() */
    427  | /*++++++++++++++++++++++++++++++++++++++
    428  |
    429  |   Sleep and wake up on special events.
    430  |
    431  |   More:
    432  |   +html+ <PRE>
    433  |   Authors:
    434  |         andrei
    435  |   +html+ </PRE>
    436  |   +html+ Sleeps timeout but wakes up when an envent occures.
    437  |
    438  |   ++++++++++++++++++++++++++++++++++++++*/
    439  | int SV_sleep(int lock, int sleeptime) {
    440  | struct timeval timeout;
    441  | struct stat st;
    442  | fd_set set;
    443  |
    444  |  if (fstat(sv_lockfd[lock], &st) ==-1) {
    445  |   fprintf(stderr, "Error stat-ing the lock file\n");
    446  |   return(-1);
    447  |  }
    448  |
    449  |  timeout.tv_sec=sleeptime;
    450  |  timeout.tv_usec=0;
    451  |
    452  |  FD_ZERO(&set);
    453  |  FD_SET(sv_lockfd[lock], &set);
    454  |
    455  |  fprintf(stderr, "Going to sleep\n");
    456  |  select(sv_lockfd[lock]+1, &set, NULL, NULL, &timeout);
    457  |
    458  |  fprintf(stderr, "Select returned\n");
    459  |
    460  |  return(0);
    461  | }
    462  |
    463  | /*++++++++++++++++++++++++++++++++++++++
    464  |
    465  |   Handle signals.
    466  |
    467  |   Changes the flags:
    468  |   	do_nrtm
    469  |   	do_update
    470  |   	do_whoisd
    471  |
    472  |   More:
    473  |   +html+ <PRE>
    474  |   Author:
    475  |         andrei
    476  |   +html+ </PRE>
    477  |   ++++++++++++++++++++++++++++++++++++++*/
    478  | void *SV_signal_thread() {
    479  | char print_buf[STR_M];
    480  | sigset_t sset;
    481  | int sigReceived;
    482  | int do_update;
    483  |
    484  | 	sigemptyset(&sset);
    485  | 	sigaddset(&sset, SIGTERM);
    486  | 	sigaddset(&sset, SIGINT);
    487  | 	sigaddset(&sset, SIGUSR1);
    488  | 	/* This is a bit confusing, but is needed */
    489  | 	/* For more information on signal handling in */
    490  | 	/* threads see for example "Multithreading Programming */
    491  | 	/* Techniques" by Shashi Prasad, ISBN 0-07-912250-7, pp. 94-101 */
    492  | 	pthread_sigmask(SIG_BLOCK, &sset, NULL);
    493  | 	/*	fprintf(stderr, "Signal handler installed\n");*/
    494  |
    495  | 	for(;;)
    496  | 	{
    497  | 	 sigwait(&sset, &sigReceived);
    498  | 	 sprintf(print_buf, "Signal received [%d]\n", sigReceived);
    499  | 	 log_print(print_buf); strcpy(print_buf, "");
    500  | 	 /*	 fprintf(stderr, "Signal received [%d]\n", sigReceived); */
    501  | 	 switch (sigReceived)
    502  | 	 {
    503  | 	   case SIGINT:
    504  | 	   /* SIGINT stops all servers */
    505  | 	        SV_shutdown();
    506  |                 pthread_exit((void *)0);
    507  |   	        break;
    508  |
    509  |   	   case SIGTERM:
    510  |   	   /* SIGTERM will switch the updates on and off */
    511  |   	        do_update=CO_get_do_update();
    512  |   	        if(do_update)do_update=0; else do_update=1;
    513  |   	   	sprintf(print_buf, "%d", do_update);
    514  | 		CO_set_const("UD.do_update", print_buf);
    515  | 		if(do_update)
    516  | 		  sprintf(print_buf, "Starting updates\n");
    517  | 		else
    518  | 		  sprintf(print_buf, "Stopping updates\n");
    519  | 		log_print(print_buf); strcpy(print_buf, "");
    520  | 		/*		fprintf(stderr, "Stopping updates (SIGTERM received)\n"); */
    521  |   	   	break;
    522  |   	 }
    523  |   	}
    524  | } /* SV_signal_thread() */
    525  |
    526  | /* SV_concurrent_server() */
    527  | /*++++++++++++++++++++++++++++++++++++++
    528  |
    529  |   This is the routine that creates the main threads.
    530  |
    531  |   int     sock        The socket to connect to.
    532  |   void *  do_function The function to call for each type of service
    533  |
    534  |   More:
    535  |   +html+ <PRE>
    536  |   Author:
    537  |         ottrey
    538  | 	joao
    539  |   +html+ </PRE>
    540  |   ++++++++++++++++++++++++++++++++++++++*/
    541  | void SV_concurrent_server(int sock, void *do_function(void *)) {
    542  |   th_args *args;
    543  |   pthread_t tid;
    544  |   pthread_attr_t attr;
    545  |
    546  |   dieif( wr_calloc((void **)&args,1,sizeof(th_args)) != UT_OK);
    547  |
    548  |   args->function=(void *)do_function;
    549  |   args->sock=sock;
    550  |
    551  | /*  pthread_mutex_init(&Whois_thread_count_lock,NULL); */
    552  |
    553  |   /* Start a new thread. */
    554  |
    555  |   TH_create(main_loop, (void *)args);
    556  |
    557  |
    558  |     /* Start a new thread. */
    559  | //  pthread_attr_init(&attr);     /* initialize attr with default attributes */
    560  | //  pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
    561  | //  pthread_create(&tid, &attr, main_thread, (void *)args);
    562  |
    563  | } /* TH_run() */
    564  |
    565  | /* SV_do_whois() */
    566  | /*++++++++++++++++++++++++++++++++++++++
    567  |
    568  |   Handle whois connections.
    569  |
    570  |   void *arg The socket to connect to. (It has to be passed in this way for this thread routine.)
    571  |
    572  |   More:
    573  |   +html+ <PRE>
    574  |   Author:
    575  |         joao
    576  |   +html+ </PRE>
    577  |   ++++++++++++++++++++++++++++++++++++++*/
    578  | void *SV_do_whois(void *arg) {
    579  |   int sock = (int)arg;
    580  |
    581  |   ER_dbg_va(FAC_TH, ASP_TH_NEW,
    582  | 	    "Whois: Child thread [%d]: Socket number = %d",
    583  | 	    pthread_self(), sock);
    584  |
    585  |   /* Use a mutex to update the global whois thread counter. */
    586  |   pthread_mutex_lock(&Whois_thread_count_lock);
    587  |   Whois_thread_count++;
    588  |   ER_dbg_va(FAC_TH, ASP_TH_NEW,
    589  | 	    "Whois_thread_count++=%d", Whois_thread_count);
    590  |
    591  |   pthread_mutex_unlock(&Whois_thread_count_lock);
    592  |
    593  |   TA_add(sock, "whois");
    594  |   PW_interact(sock);
    595  |   TA_delete();
    596  |
    597  |   /* Use a mutex to update the global whois thread counter. */
    598  |   pthread_mutex_lock(&Whois_thread_count_lock);
    599  |   Whois_thread_count--;
    600  |   ER_dbg_va(FAC_TH, ASP_TH_NEW,
    601  | 	    "Whois_thread_count--=%d", Whois_thread_count);
    602  |   pthread_mutex_unlock(&Whois_thread_count_lock);
    603  |
    604  |   pthread_exit((void *)0);
    605  |
    606  | } /* SV_do_whois() */
    607  |
    608  | /* SV_do_mirror() */
    609  | /*++++++++++++++++++++++++++++++++++++++
    610  |
    611  |   Handle NRTM connections.
    612  |
    613  |   void *arg The socket to connect to. (It has to be passed in this way for this thread routine.)
    614  |
    615  |   More:
    616  |   +html+ <PRE>
    617  |   Author:
    618  |         joao
    619  |   +html+ </PRE>
    620  |   ++++++++++++++++++++++++++++++++++++++*/
    621  | void *SV_do_mirror(void *arg) {
    622  |   int sock = (int)arg;
    623  |   char print_buf[STR_M];
    624  |
    625  |   sprintf(print_buf, "NRTM: Child thread [%d]: Socket number = %d\n", pthread_self(), sock); log_print(print_buf); strcpy(print_buf, "");
    626  |
    627  |   /* Use a mutex to update the global mirror thread counter. */
    628  |   pthread_mutex_lock(&Mirror_thread_count_lock);
    629  |   Mirror_thread_count++;
    630  |   sprintf(print_buf, "Mirror_thread_count++=%d\n", Mirror_thread_count); log_print(print_buf); strcpy(print_buf, "");
    631  |   pthread_mutex_unlock(&Mirror_thread_count_lock);
    632  |
    633  |   TA_add(sock, "mirror");
    634  |   PM_interact(sock);
    635  |   TA_delete();
    636  |
    637  |   /* Use a mutex to update the global mirror thread counter. */
    638  |   pthread_mutex_lock(&Mirror_thread_count_lock);
    639  |   Mirror_thread_count--;
    640  |   sprintf(print_buf, "Mirror_thread_count--=%d\n", Mirror_thread_count); log_print(print_buf); strcpy(print_buf, "");
    641  |   pthread_mutex_unlock(&Mirror_thread_count_lock);
    642  |
    643  |   pthread_exit((void *)0);
    644  |
    645  | } /* SV_do_mirror() */
    646  |
    647  | /* SV_do_config() */
    648  | /*++++++++++++++++++++++++++++++++++++++
    649  |
    650  |   Handle config connections.
    651  |
    652  |   void *arg The socket to connect to. (It has to be passed in this way for this
    653  | thread routine.)
    654  |
    655  |   More:
    656  |   +html+ <PRE>
    657  |   Author:
    658  |         joao
    659  |   +html+ </PRE>
    660  |   ++++++++++++++++++++++++++++++++++++++*/
    661  | void *SV_do_config(void *arg) {
    662  |   int sock = (int)arg;
    663  |   char print_buf[STR_M];
    664  |
    665  |   sprintf(print_buf, "Config: Child thread [%d]: Socket number = %d\n", pthread_self(), sock); log_print(print_buf); strcpy(print_buf, "");
    666  |
    667  | /*
    668  |   printf("Hi there, there is nothing to configure yet\nBye..... :-)\n");
    669  |   fflush(NULL);
    670  |
    671  |   SK_close(sock);
    672  | */
    673  |   TA_add(sock, "config");
    674  |   PC_interact(sock);
    675  |   TA_delete();
    676  |
    677  |   pthread_exit((void *)0);
    678  |
    679  | } /* SV_do_config() */
    680  |
    681  |
    682  | /*++++++++++++++++++++++++++++++++++++++
    683  |
    684  |   This is the routine that creates a watchdog thread.
    685  |
    686  |   The watchdog will cancel (pthread_cancel()) the calling thread in case the
    687  |   socket is closed by the client (its read-half is closed). The calling
    688  |   thread should make necessaruy preparations when calling the watchdog:
    689  |
    690  |   - the socket should be connected
    691  |   - cancellation points and cleanup routines should be defined
    692  |
    693  |   In case the connection is closed by the calling thread itself, the
    694  |   watchdog just exits and no action against the calling thread is performed.
    695  |
    696  |   wd_args - a pointer to wd_args_t structure containing
    697  |             data about socket and thread ID
    698  |
    699  |   More:
    700  |   +html+ <PRE>
    701  |   Author:
    702  |         ottrey
    703  | 	joao
    704  | 	andrei
    705  |   +html+ </PRE>
    706  |   ++++++++++++++++++++++++++++++++++++++*/
    707  |
    708  | void SV_watchdog(wd_args_t *wd_args) {
    709  |  pthread_t tid;
    710  |  pthread_attr_t attr;
    711  |
    712  |  /* Start a new thread. */
    713  |  TH_create((void *(*)(void *))do_watchdog, (void *)wd_args);
    714  |
    715  | // pthread_attr_init(&attr);     /* initialize attr with default attributes */
    716  | // pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
    717  | // pthread_create(&tid, &attr, (void *(*)(void *))do_watchdog, (void *)wd_args);
    718  |
    719  | }
    720  |
    721  |
    722  | /*++++++++++++++++++++++++++++++++++++++
    723  |
    724  | The watchdog thread itself
    725  |
    726  | The watchdog thread makes select() on the connected socket waiting until it
    727  | becomes readable. If this happens as a result of some input, it'll simply
    728  | dump it. Otherwise, this indicates that the client has closed the
    729  | connection. In this case watchdog will cancel (pthread_cancel()) the whois
    730  | thread (which in its turn will kill (mysql_kill()) mysql thread as part of
    731  | its cleanup routine).
    732  |
    733  | More:
    734  | +html+ <PRE>
    735  | Author:
    736  |       andrei
    737  | +html+ </PRE>
    738  | ++++++++++++++++++++++++++++++++++++++*/
    739  | static void do_watchdog(void *arg) {
    740  |   wd_args_t *wd_args = (wd_args_t *)arg;
    741  |   int socket;
    742  |   pthread_t tid;
    743  |   int nready;
    744  |   int n;
    745  |   fd_set rset;
    746  |   char buff[STR_S];
    747  |
    748  |   socket = wd_args->connected_socket;
    749  |   tid = wd_args->tid;
    750  |
    751  |
    752  |   FD_ZERO(&rset);
    753  |   FD_SET(socket, &rset);
    754  |
    755  |   while ((nready=select(socket+1, &rset, NULL, NULL, NULL))!=-1) {
    756  |
    757  |    /* There was some input or client half of connection was closed */
    758  |    /* Check for the latter */
    759  |    if (( n=read(socket, buff, sizeof(buff))) == 0) {
    760  |    /* Connection was closed by client */
    761  |    /* Now send a cancellation request to the whois thread. */
    762  |    /* mysql thread will be terminated by thread cleanup routine */
    763  |
    764  |    /* The only possible error is ESRCH, so we do not care about */
    765  |    pthread_cancel(tid);
    766  |
    767  |    /* Exit the watchdog thread, passing NULL as we don't expect pthread_join() */
    768  |    pthread_exit(NULL);
    769  |    }
    770  |
    771  |    /* Otherwise dump input and continue */
    772  |   }
    773  |
    774  |   /* the only reason that we are here is that the socket has been */
    775  |   /* closed by the whois thread and not valid. Just exit the watchdog, */
    776  |   /* passing NULL as we don't expect pthread_join() */
    777  |    pthread_exit(NULL);
    778  |
    779  | }