Source File modules/sv/server.c

    1    | /***************************************
    2    |   $Revision: 1.36 $
    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  |   FILE *logf;
    122  |
    123  |   if (CO_get_thread_logging() == 1) {
    124  |     if (strcmp(CO_get_thread_logfile(), "stdout") == 0) {
    125  |       printf(arg);
    126  |     }
    127  |     else {
    128  |       logf = fopen(CO_get_thread_logfile(), "a");
    129  |       fprintf(logf, arg);
    130  |       fclose(logf);
    131  |     }
    132  |   }
    133  |
    134  | } /* log_print() */
    135  |
    136  |
    137  | void radix_init(void){
    138  |   int i;
    139  |   ca_dbSource_t *source_hdl;
    140  |
    141  |   wr_log_set(0);
    142  |   /* this needs to be done in two loops,
    143  |      because the trees must be created asap (first loop)
    144  |      and then locked until they are populated in the second loop
    145  |   */
    146  |
    147  |   for(i=0; (source_hdl = ca_get_SourceHandleByPosition(i))!=NULL ; i++){
    148  |     dieif( RP_init_trees( source_hdl ) != RP_OK );
    149  |   }
    150  |
    151  |   for(i=0; (source_hdl = ca_get_SourceHandleByPosition(i))!=NULL ; i++){
    152  |     dieif( RP_sql_load_reg( source_hdl ) != RP_OK );
    153  |   }
    154  |
    155  | #if 0
    156  |   {
    157  |       er_path_t erlogstr;
    158  |
    159  |       erlogstr.fdes = stdout;
    160  |       erlogstr.asp  = 0xffff0000;
    161  |       erlogstr.fac  = 0; /* FAC_QI; */
    162  |       erlogstr.sev  = ER_SEV_D;
    163  |       erlogstr.mode = ER_M_SEVCHAR | ER_M_FACSYMB | ER_M_TEXTLONG;
    164  |
    165  |       ER_setpath(& erlogstr);
    166  |   }
    167  | #endif
    168  |   wr_log_set(0); /* switch on/off the memory leak detector */
    169  | /*  pthread_mutex_unlock( &radix_initializing_lock );  */
    170  |
    171  |   pthread_exit((void *)0);
    172  | }
    173  |
    174  | /* main_loop() */
    175  | /*++++++++++++++++++++++++++++++++++++++
    176  |
    177  |   Waits for an incoming connection on the and spawns a new thread to handle it.
    178  |
    179  |   void *arg Pointer to a struct containing the socket to talk to the client and
    180  |             the function to call depending on the incoming connection.
    181  |
    182  |   More:
    183  |   +html+ <PRE>
    184  |   Author:
    185  |         ottrey
    186  | 	joao
    187  | 	andrei (do_server)
    188  |   +html+ </PRE>
    189  |   ++++++++++++++++++++++++++++++++++++++*/
    190  | static void  *main_loop(void *arg) {
    191  |   th_args *args = (th_args *)arg;
    192  |   int connected_socket;
    193  |   int do_server;
    194  |
    195  |   while(do_server=CO_get_do_server()) {
    196  |
    197  |     connected_socket = SK_accept_connection(args->sock);
    198  |     if(connected_socket==-1) break;
    199  |
    200  |
    201  |     ER_dbg_va(FAC_TH, ASP_TH_NEW, "Starting a new thread");
    202  |
    203  |     /* Start a new thread. */
    204  |
    205  |
    206  |     TH_create((void *(*)(void *))(args->function), (void *)connected_socket);
    207  | //
    208  | //    pthread_attr_init(&attr);    /* initialize attr with default attributes */
    209  | //    pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
    210  | //    pthread_create(&tid, &attr, (void *(*)(void *))(args->function), (void *)connected_socket);
    211  |   }
    212  |
    213  |    ER_dbg_va(FAC_TH, ASP_TH_NEW, "Exiting from the main loop");
    214  |
    215  | } /* main_loop() */
    216  |
    217  |
    218  | /* SV_start() */
    219  | /*++++++++++++++++++++++++++++++++++++++
    220  |
    221  |   Start the server.
    222  |
    223  |   More:
    224  |   +html+ <PRE>
    225  |   Authors:
    226  |         ottrey
    227  |         joao
    228  |   +html+ </PRE>
    229  |   +html+ Starts up the server.
    230  |   +html+ <OL>
    231  |   +html+   <LI> Create sockets on the necessary ports (whois, config and mirror)
    232  |   +html+   <LI> Start new threads for each service.
    233  |   +html+ </OL>
    234  |   +html+ <A HREF=".DBrc">.properties</A>
    235  |
    236  |   ++++++++++++++++++++++++++++++++++++++*/
    237  | void SV_start() {
    238  |   /* Make listening sockets global variables  */
    239  |   /*  int whois_sock,config_sock,mirror_sock,update_sock; */
    240  |   /* uint32_t whois_addr,sock_addr,mirror_addr; */
    241  |   int whois_port = -1;
    242  |   int config_port = -1;
    243  |   int mirror_port = -1;
    244  |   int update_port = -1;
    245  |   int update_mode = 0;
    246  |   sigset_t sset;
    247  |   int fdes[2];
    248  |   struct timeval tval;
    249  |   ca_dbSource_t *source_hdl;
    250  |   char *source_name;
    251  |   int source;
    252  |
    253  |   /* Store the starting time */
    254  |   gettimeofday(&tval, NULL);
    255  |   SV_starttime = tval.tv_sec;/* seconds since Jan. 1, 1970 */
    256  |
    257  |   /* Create interrupt pipe */
    258  |   /* Writing to this pipe will cause sleeping threads */
    259  |   /* to wake up */
    260  |   fprintf(stderr, "Creating an interrupt pipe\n");
    261  |   if(pipe(fdes)==-1) {
    262  |    printf("Cannot open interrupt pipe\n");
    263  |    exit(-1);
    264  |   }
    265  |   /* Save the pipe descriptors in sv_lock array */
    266  |   sv_lockfd[WLOCK_SHTDOWN]=fdes[0];
    267  |   sv_lockfd[LOCK_SHTDOWN]=fdes[1];
    268  |
    269  |
    270  |   /* Initialise the access control list. */
    271  |   AC_build();
    272  |   AC_acc_load();
    273  |   /* explicitly start the decay thread */
    274  |   TH_create((void *(*)(void *))AC_decay, NULL);
    275  |
    276  |   /* Initialise the radix tree (separate thread[s])
    277  |      already can allow socket connections, because the trees will
    278  |      be created locked, and will be unlocked when loaded */
    279  |
    280  | /*   pthread_mutex_lock( &radix_initializing_lock );  */
    281  |   TH_create((void *(*)(void *))radix_init, NULL);
    282  | /*  pthread_mutex_lock( &radix_initializing_lock );  */
    283  |
    284  |
    285  |   /* XXX I have no idea how this is working!! It's wrong! - ottrey 30/7/99 */
    286  |   /* Get port information for each service */
    287  |   whois_port = SK_atoport(CO_get_whois_port(), "tcp");
    288  |   printf("XXX htons(whois_port)=%d\n", htons(whois_port));
    289  |   if(whois_port == -1) {
    290  |     printf("Invalid service/port: %d\n", htons(whois_port));
    291  |     exit(-1);
    292  |   }
    293  |
    294  |   /* XXX I have no idea how this is working!! It's wrong! - ottrey 30/7/99 */
    295  |   config_port = SK_atoport(CO_get_config_port(), "tcp");
    296  |   printf("XXX htons(config_port)=%d\n", htons(config_port));
    297  |   if(config_port == -1) {
    298  |     printf("Invalid service/port: %d\n", htons(config_port));
    299  |     exit(-1);
    300  |   }
    301  |   mirror_port = SK_atoport(CO_get_mirror_port(), "tcp");
    302  |   printf("XXX htons(mirror_port)=%d\n", htons(mirror_port));
    303  |   if(mirror_port == -1) {
    304  |     printf("Invalid service/port: %d\n", mirror_port);
    305  |     exit(-1);
    306  |   }
    307  |
    308  |   /* XXX I have no idea how this is working!! It's wrong! - ottrey 30/7/99 */
    309  | /*  update_port = SK_atoport(CO_get_update_port(), "tcp"); */
    310  | /*  printf("XXX htons(update_port)=%d\n", htons(update_port)); */
    311  | /*  if(update_port == -1) { */
    312  | /*    printf("Invalid service/port: %d\n", htons(update_port)); */
    313  | /*    exit(-1); */
    314  | /*  } */
    315  |
    316  |
    317  |
    318  |   /* 6. Create a socket on the necessary ports/addresses and bind to them. */
    319  |   /* whois socket */
    320  |   SV_whois_sock = SK_getsock(SOCK_STREAM, whois_port, INADDR_ANY);
    321  | /* Currently binds to INADDR_ANY. Will need to get specific address */
    322  | /*  SV_whois_sock = SK_getsock(SOCK_STREAM,whois_port,whois_addr); */
    323  |   /* config interface socket */
    324  |   SV_config_sock = SK_getsock(SOCK_STREAM, config_port, INADDR_ANY);
    325  |   /* nrt socket */
    326  |   SV_mirror_sock = SK_getsock(SOCK_STREAM,mirror_port,INADDR_ANY);
    327  |
    328  |
    329  |
    330  |   /* update interface socket */
    331  |   /* we need first to create and bind all of them */
    332  |   /* so that in case of failure we do not start any */
    333  |   /* update thread */
    334  |   for(source=0; (source_hdl = ca_get_SourceHandleByPosition(source))!=NULL ; source++){
    335  |      update_mode = ca_get_srcmode(source_hdl);
    336  |      if(IS_UPDATE(update_mode)) {
    337  |        /* update_port = SK_atoport(CO_get_update_port(), "tcp"); */
    338  |        update_port = htons(ca_get_srcupdateport(source_hdl));
    339  |        printf("XXX htons(update_port)=%d\n", htons(update_port));
    340  |        /* XXX ask AMRM to change the name of the function */
    341  |
    342  |        SV_update_sock[source] = SK_getsock(SOCK_STREAM, update_port, INADDR_ANY);
    343  |      }
    344  |      else SV_update_sock[source] = 0;
    345  |   }
    346  |   SV_update_sock[source+1]=-1; /* end of socket array */
    347  |
    348  |   /* Now.... accept() calls block until they get a connection
    349  |      so to listen on more than one port we need more
    350  |      than one thread */
    351  |
    352  |   /* Create master thread for whois threads */
    353  |    SV_concurrent_server(SV_whois_sock, SV_do_whois);
    354  |
    355  |   /* Create master thread for config threads */
    356  |    SV_concurrent_server(SV_config_sock, SV_do_config);
    357  |   /* Create master thread for mirror threads */
    358  |    SV_concurrent_server(SV_mirror_sock, SV_do_mirror);
    359  |
    360  | /* Walk through the sources and */
    361  | /* run update thread for every source with CANUPD == 'y' */
    362  |
    363  |    for(source=0; (source_hdl = ca_get_SourceHandleByPosition(source))!=NULL ; source++){
    364  |      update_mode = ca_get_srcmode(source_hdl);
    365  |      source_name= ca_get_srcname(source_hdl);
    366  |
    367  |      if(IS_UPDATE(update_mode)) {
    368  |      /* run RIPupdate thread */
    369  |        fprintf(stderr,"Source [%s] Mode UPDATE\n", source_name);
    370  |        TH_create((void *(*)(void *))UD_do_updates, (void *)source);
    371  |      }
    372  |      else {
    373  |        /* start NRTM client */
    374  |        fprintf(stderr,"Source [%s] Mode NRTM\n", source_name);
    375  |        TH_create((void *(*)(void *))UD_do_nrtm, (void *)source);
    376  |      }
    377  |      free(source_name); /* because ca_* functions return copies */
    378  |    }
    379  |
    380  |
    381  |
    382  |   /* XXX Is this needed? */
    383  |   pthread_exit(NULL);
    384  |
    385  | } /* SV_start() */
    386  |
    387  | /* SV_shutdown() */
    388  | /*++++++++++++++++++++++++++++++++++++++
    389  |
    390  |   Shutdown the server.
    391  |
    392  |   More:
    393  |   +html+ <PRE>
    394  |   Authors:
    395  |         andrei
    396  |   +html+ </PRE>
    397  |   +html+ Stops the server.
    398  |   +html+ <OL>
    399  |   +html+   <LI> Close listening sockets (whois, config, mirror and updates)
    400  |   +html+   <LI> Stop all threads by triggering do_server variable.
    401  |   +html+ </OL>
    402  |   +html+ <A HREF=".DBrc">.properties</A>
    403  |
    404  |   ++++++++++++++++++++++++++++++++++++++*/
    405  | void SV_shutdown() {
    406  | char print_buf[STR_M];
    407  | int source;
    408  |
    409  |  sprintf(print_buf, "%d", 0);
    410  |  /* Stop updates */
    411  |  CO_set_const("UD.do_update", print_buf);
    412  |  /* Stop all servers */
    413  |  CO_set_const("SV.do_server", print_buf);
    414  |  sprintf(print_buf, "Stopping all servers\n");
    415  |  fprintf(stderr, print_buf);
    416  |  /*log_print(print_buf); */
    417  |  strcpy(print_buf, "");
    418  |
    419  |  /* Wake up all sleeping threads */
    420  |  fprintf(stderr, "Going to wake sleeping threads up\n");
    421  |  write(sv_lockfd[WLOCK_SHTDOWN], " ", 1);
    422  |
    423  |  /* CLose all listening sockets, so accept call exits */
    424  |  close(SV_whois_sock);
    425  |  close(SV_config_sock);
    426  |  close(SV_mirror_sock);
    427  |  for (source=0; SV_update_sock[source]!=-1; source++)
    428  | 	 if(SV_update_sock[source]!=0)close(SV_update_sock[source]);
    429  |
    430  |
    431  | } /* SV_shutdown() */
    432  |
    433  |
    434  | /* SV_sleep() */
    435  | /*++++++++++++++++++++++++++++++++++++++
    436  |
    437  |   Sleep and wake up on special events.
    438  |
    439  |   More:
    440  |   +html+ <PRE>
    441  |   Authors:
    442  |         andrei
    443  |   +html+ </PRE>
    444  |   +html+ Sleeps timeout but wakes up when an envent occures.
    445  |
    446  |   ++++++++++++++++++++++++++++++++++++++*/
    447  | int SV_sleep(int lock, int sleeptime) {
    448  | struct timeval timeout;
    449  | struct stat st;
    450  | fd_set set;
    451  |
    452  |  if (fstat(sv_lockfd[lock], &st) ==-1) {
    453  |   fprintf(stderr, "Error stat-ing the lock file\n");
    454  |   return(-1);
    455  |  }
    456  |
    457  |  timeout.tv_sec=sleeptime;
    458  |  timeout.tv_usec=0;
    459  |
    460  |  FD_ZERO(&set);
    461  |  FD_SET(sv_lockfd[lock], &set);
    462  |
    463  |  fprintf(stderr, "Going to sleep\n");
    464  |  select(sv_lockfd[lock]+1, &set, NULL, NULL, &timeout);
    465  |
    466  |  fprintf(stderr, "Select returned\n");
    467  |
    468  |  return(0);
    469  | }
    470  |
    471  | /*++++++++++++++++++++++++++++++++++++++
    472  |
    473  |   Handle signals.
    474  |
    475  |   Changes the flags:
    476  |   	do_nrtm
    477  |   	do_update
    478  |   	do_whoisd
    479  |
    480  |   More:
    481  |   +html+ <PRE>
    482  |   Author:
    483  |         andrei
    484  |   +html+ </PRE>
    485  |   ++++++++++++++++++++++++++++++++++++++*/
    486  | void *SV_signal_thread() {
    487  | char print_buf[STR_M];
    488  | sigset_t sset;
    489  | int sigReceived;
    490  | int do_update;
    491  |
    492  | 	sigemptyset(&sset);
    493  | 	sigaddset(&sset, SIGTERM);
    494  | 	sigaddset(&sset, SIGINT);
    495  | 	sigaddset(&sset, SIGUSR1);
    496  | 	/* This is a bit confusing, but is needed */
    497  | 	/* For more information on signal handling in */
    498  | 	/* threads see for example "Multithreading Programming */
    499  | 	/* Techniques" by Shashi Prasad, ISBN 0-07-912250-7, pp. 94-101 */
    500  | 	pthread_sigmask(SIG_BLOCK, &sset, NULL);
    501  | 	/*	fprintf(stderr, "Signal handler installed\n");*/
    502  |
    503  | 	for(;;)
    504  | 	{
    505  | 	 sigwait(&sset, &sigReceived);
    506  | 	 sprintf(print_buf, "Signal received [%d]\n", sigReceived);
    507  | 	 log_print(print_buf); strcpy(print_buf, "");
    508  | 	 /*	 fprintf(stderr, "Signal received [%d]\n", sigReceived); */
    509  | 	 switch (sigReceived)
    510  | 	 {
    511  | 	   case SIGINT:
    512  | 	   /* SIGINT stops all servers */
    513  | 	        SV_shutdown();
    514  |                 pthread_exit((void *)0);
    515  |   	        break;
    516  |
    517  |   	   case SIGTERM:
    518  |   	   /* SIGTERM will switch the updates on and off */
    519  |   	        do_update=CO_get_do_update();
    520  |   	        if(do_update)do_update=0; else do_update=1;
    521  |   	   	sprintf(print_buf, "%d", do_update);
    522  | 		CO_set_const("UD.do_update", print_buf);
    523  | 		if(do_update)
    524  | 		  sprintf(print_buf, "Starting updates\n");
    525  | 		else
    526  | 		  sprintf(print_buf, "Stopping updates\n");
    527  | 		log_print(print_buf); strcpy(print_buf, "");
    528  | 		/*		fprintf(stderr, "Stopping updates (SIGTERM received)\n"); */
    529  |   	   	break;
    530  |   	 }
    531  |   	}
    532  | } /* SV_signal_thread() */
    533  |
    534  | /* SV_concurrent_server() */
    535  | /*++++++++++++++++++++++++++++++++++++++
    536  |
    537  |   This is the routine that creates the main threads.
    538  |
    539  |   int     sock        The socket to connect to.
    540  |   void *  do_function The function to call for each type of service
    541  |
    542  |   More:
    543  |   +html+ <PRE>
    544  |   Author:
    545  |         ottrey
    546  | 	joao
    547  |   +html+ </PRE>
    548  |   ++++++++++++++++++++++++++++++++++++++*/
    549  | void SV_concurrent_server(int sock, void *do_function(void *)) {
    550  |   th_args *args;
    551  |   pthread_t tid;
    552  |   pthread_attr_t attr;
    553  |
    554  |   dieif( wr_calloc((void **)&args,1,sizeof(th_args)) != UT_OK);
    555  |
    556  |   args->function=(void *)do_function;
    557  |   args->sock=sock;
    558  |
    559  | /*  pthread_mutex_init(&Whois_thread_count_lock,NULL); */
    560  |
    561  |   /* Start a new thread. */
    562  |
    563  |   TH_create(main_loop, (void *)args);
    564  |
    565  |
    566  |     /* Start a new thread. */
    567  | //  pthread_attr_init(&attr);     /* initialize attr with default attributes */
    568  | //  pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
    569  | //  pthread_create(&tid, &attr, main_thread, (void *)args);
    570  |
    571  | } /* TH_run() */
    572  |
    573  | /* SV_do_whois() */
    574  | /*++++++++++++++++++++++++++++++++++++++
    575  |
    576  |   Handle whois connections.
    577  |
    578  |   void *arg The socket to connect to. (It has to be passed in this way for this thread routine.)
    579  |
    580  |   More:
    581  |   +html+ <PRE>
    582  |   Author:
    583  |         joao
    584  |   +html+ </PRE>
    585  |   ++++++++++++++++++++++++++++++++++++++*/
    586  | void *SV_do_whois(void *arg) {
    587  |   int sock = (int)arg;
    588  |
    589  |   ER_dbg_va(FAC_TH, ASP_TH_NEW,
    590  | 	    "Whois: Child thread [%d]: Socket number = %d",
    591  | 	    pthread_self(), sock);
    592  |
    593  |   /* Use a mutex to update the global whois thread counter. */
    594  |   pthread_mutex_lock(&Whois_thread_count_lock);
    595  |   Whois_thread_count++;
    596  |   ER_dbg_va(FAC_TH, ASP_TH_NEW,
    597  | 	    "Whois_thread_count++=%d", Whois_thread_count);
    598  |
    599  |   pthread_mutex_unlock(&Whois_thread_count_lock);
    600  |
    601  |   TA_add(sock, "whois");
    602  |   PW_interact(sock);
    603  |   TA_delete();
    604  |
    605  |   /* Use a mutex to update the global whois thread counter. */
    606  |   pthread_mutex_lock(&Whois_thread_count_lock);
    607  |   Whois_thread_count--;
    608  |   ER_dbg_va(FAC_TH, ASP_TH_NEW,
    609  | 	    "Whois_thread_count--=%d", Whois_thread_count);
    610  |   pthread_mutex_unlock(&Whois_thread_count_lock);
    611  |
    612  |   pthread_exit((void *)0);
    613  |
    614  | } /* SV_do_whois() */
    615  |
    616  | /* SV_do_mirror() */
    617  | /*++++++++++++++++++++++++++++++++++++++
    618  |
    619  |   Handle NRTM connections.
    620  |
    621  |   void *arg The socket to connect to. (It has to be passed in this way for this thread routine.)
    622  |
    623  |   More:
    624  |   +html+ <PRE>
    625  |   Author:
    626  |         joao
    627  |   +html+ </PRE>
    628  |   ++++++++++++++++++++++++++++++++++++++*/
    629  | void *SV_do_mirror(void *arg) {
    630  |   int sock = (int)arg;
    631  |   char print_buf[STR_M];
    632  |
    633  |   sprintf(print_buf, "NRTM: Child thread [%d]: Socket number = %d\n", pthread_self(), sock); log_print(print_buf); strcpy(print_buf, "");
    634  |
    635  |   /* Use a mutex to update the global mirror thread counter. */
    636  |   pthread_mutex_lock(&Mirror_thread_count_lock);
    637  |   Mirror_thread_count++;
    638  |   sprintf(print_buf, "Mirror_thread_count++=%d\n", Mirror_thread_count); log_print(print_buf); strcpy(print_buf, "");
    639  |   pthread_mutex_unlock(&Mirror_thread_count_lock);
    640  |
    641  |   TA_add(sock, "mirror");
    642  |   PM_interact(sock);
    643  |   TA_delete();
    644  |
    645  |   /* Use a mutex to update the global mirror thread counter. */
    646  |   pthread_mutex_lock(&Mirror_thread_count_lock);
    647  |   Mirror_thread_count--;
    648  |   sprintf(print_buf, "Mirror_thread_count--=%d\n", Mirror_thread_count); log_print(print_buf); strcpy(print_buf, "");
    649  |   pthread_mutex_unlock(&Mirror_thread_count_lock);
    650  |
    651  |   pthread_exit((void *)0);
    652  |
    653  | } /* SV_do_mirror() */
    654  |
    655  | /* SV_do_config() */
    656  | /*++++++++++++++++++++++++++++++++++++++
    657  |
    658  |   Handle config connections.
    659  |
    660  |   void *arg The socket to connect to. (It has to be passed in this way for this
    661  | thread routine.)
    662  |
    663  |   More:
    664  |   +html+ <PRE>
    665  |   Author:
    666  |         joao
    667  |   +html+ </PRE>
    668  |   ++++++++++++++++++++++++++++++++++++++*/
    669  | void *SV_do_config(void *arg) {
    670  |   int sock = (int)arg;
    671  |   char print_buf[STR_M];
    672  |
    673  |   sprintf(print_buf, "Config: Child thread [%d]: Socket number = %d\n", pthread_self(), sock); log_print(print_buf); strcpy(print_buf, "");
    674  |
    675  | /*
    676  |   printf("Hi there, there is nothing to configure yet\nBye..... :-)\n");
    677  |   fflush(NULL);
    678  |
    679  |   SK_close(sock);
    680  | */
    681  |   TA_add(sock, "config");
    682  |   PC_interact(sock);
    683  |   TA_delete();
    684  |
    685  |   pthread_exit((void *)0);
    686  |
    687  | } /* SV_do_config() */
    688  |
    689  |
    690  | /*++++++++++++++++++++++++++++++++++++++
    691  |
    692  |   This is the routine that creates a watchdog thread.
    693  |
    694  |   The watchdog will cancel (pthread_cancel()) the calling thread in case the
    695  |   socket is closed by the client (its read-half is closed). The calling
    696  |   thread should make necessaruy preparations when calling the watchdog:
    697  |
    698  |   - the socket should be connected
    699  |   - cancellation points and cleanup routines should be defined
    700  |
    701  |   In case the connection is closed by the calling thread itself, the
    702  |   watchdog just exits and no action against the calling thread is performed.
    703  |
    704  |   wd_args - a pointer to wd_args_t structure containing
    705  |             data about socket and thread ID
    706  |
    707  |   More:
    708  |   +html+ <PRE>
    709  |   Author:
    710  |         ottrey
    711  | 	joao
    712  | 	andrei
    713  |   +html+ </PRE>
    714  |   ++++++++++++++++++++++++++++++++++++++*/
    715  |
    716  | void SV_watchdog(wd_args_t *wd_args) {
    717  |  pthread_t tid;
    718  |  pthread_attr_t attr;
    719  |
    720  |  /* Start a new thread. */
    721  |  TH_create((void *(*)(void *))do_watchdog, (void *)wd_args);
    722  |
    723  | // pthread_attr_init(&attr);     /* initialize attr with default attributes */
    724  | // pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
    725  | // pthread_create(&tid, &attr, (void *(*)(void *))do_watchdog, (void *)wd_args);
    726  |
    727  | }
    728  |
    729  |
    730  | /*++++++++++++++++++++++++++++++++++++++
    731  |
    732  | The watchdog thread itself
    733  |
    734  | The watchdog thread makes select() on the connected socket waiting until it
    735  | becomes readable. If this happens as a result of some input, it'll simply
    736  | dump it. Otherwise, this indicates that the client has closed the
    737  | connection. In this case watchdog will cancel (pthread_cancel()) the whois
    738  | thread (which in its turn will kill (mysql_kill()) mysql thread as part of
    739  | its cleanup routine).
    740  |
    741  | More:
    742  | +html+ <PRE>
    743  | Author:
    744  |       andrei
    745  | +html+ </PRE>
    746  | ++++++++++++++++++++++++++++++++++++++*/
    747  | static void do_watchdog(void *arg) {
    748  |   wd_args_t *wd_args = (wd_args_t *)arg;
    749  |   int socket;
    750  |   pthread_t tid;
    751  |   int nready;
    752  |   int n;
    753  |   fd_set rset;
    754  |   char buff[STR_S];
    755  |
    756  |   socket = wd_args->connected_socket;
    757  |   tid = wd_args->tid;
    758  |
    759  |
    760  |   FD_ZERO(&rset);
    761  |   FD_SET(socket, &rset);
    762  |
    763  |   while ((nready=select(socket+1, &rset, NULL, NULL, NULL))!=-1) {
    764  |
    765  |    /* There was some input or client half of connection was closed */
    766  |    /* Check for the latter */
    767  |    if (( n=read(socket, buff, sizeof(buff))) == 0) {
    768  |    /* Connection was closed by client */
    769  |    /* Now send a cancellation request to the whois thread. */
    770  |    /* mysql thread will be terminated by thread cleanup routine */
    771  |
    772  |    /* The only possible error is ESRCH, so we do not care about */
    773  |    pthread_cancel(tid);
    774  |
    775  |    /* Exit the watchdog thread, passing NULL as we don't expect pthread_join() */
    776  |    pthread_exit(NULL);
    777  |    }
    778  |
    779  |    /* Otherwise dump input and continue */
    780  |   }
    781  |
    782  |   /* the only reason that we are here is that the socket has been */
    783  |   /* closed by the whois thread and not valid. Just exit the watchdog, */
    784  |   /* passing NULL as we don't expect pthread_join() */
    785  |    pthread_exit(NULL);
    786  |
    787  | }