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citadel  8.12
Defines | Functions
serv_netconfig.c File Reference
#include "sysdep.h"
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <fcntl.h>
#include <ctype.h>
#include <signal.h>
#include <pwd.h>
#include <errno.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <dirent.h>
#include <time.h>
#include <sys/wait.h>
#include <string.h>
#include <limits.h>
#include <libcitadel.h>
#include "citadel.h"
#include "server.h"
#include "citserver.h"
#include "support.h"
#include "config.h"
#include "user_ops.h"
#include "database.h"
#include "msgbase.h"
#include "internet_addressing.h"
#include "serv_network.h"
#include "clientsocket.h"
#include "file_ops.h"
#include "citadel_dirs.h"
#include "threads.h"
#include "snprintf.h"
#include "context.h"
#include "netconfig.h"
#include "netspool.h"
#include "ctdl_module.h"

Go to the source code of this file.

Defines

#define EXP   259200 /* three days */

Functions

void DeleteNodeConf (void *vNode)
NodeConfNewNode (StrBuf *SerializedNode)
HashList * load_ignetcfg (void)
void DeleteNetMap (void *vNetMap)
NetMapNewNetMap (StrBuf *SerializedNetMap)
HashList * read_network_map (void)
StrBuf * SerializeNetworkMap (HashList *Map)
void network_learn_topology (char *node, char *path, HashList *the_netmap, int *netmap_changed)
int is_valid_node (const StrBuf **nexthop, const StrBuf **secret, StrBuf *node, HashList *IgnetCfg, HashList *the_netmap)
void cmd_gnet (char *argbuf)
void cmd_snet (char *argbuf)
void cmd_netp (char *cmdbuf)
int netconfig_check_roomaccess (char *errmsgbuf, size_t n, const char *RemoteIdentifier)
 CTDL_MODULE_INIT (netconfig)

Define Documentation

#define EXP   259200 /* three days */

Definition at line 34 of file serv_netconfig.c.


Function Documentation

void cmd_gnet ( char *  argbuf)

Definition at line 355 of file serv_netconfig.c.

{
       char filename[PATH_MAX];
       char buf[SIZ];
       FILE *fp;

       if ( (CC->room.QRflags & QR_MAILBOX) && (CC->user.usernum == atol(CC->room.QRname)) ) {
              /* users can edit the netconfigs for their own mailbox rooms */
       }
       else if (CtdlAccessCheck(ac_room_aide)) return;

       assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
       cprintf("%d Network settings for room #%ld <%s>\n",
              LISTING_FOLLOWS,
              CC->room.QRnumber, CC->room.QRname);

       fp = fopen(filename, "r");
       if (fp != NULL) {
              while (fgets(buf, sizeof buf, fp) != NULL) {
                     buf[strlen(buf)-1] = 0;
                     cprintf("%s\n", buf);
              }
              fclose(fp);
       }

       cprintf("000\n");
}

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void cmd_netp ( char *  cmdbuf)

Definition at line 467 of file serv_netconfig.c.

{
       struct CitContext *CCC = CC;
       HashList *working_ignetcfg;
       char *node;
       StrBuf *NodeStr;
       long nodelen;
       int v;

       const StrBuf *secret = NULL;
       const StrBuf *nexthop = NULL;
       char err_buf[SIZ] = "";

       /* Authenticate */
       node = CCC->curr_user;
       nodelen = extract_token(CCC->curr_user, cmdbuf, 0, '|', sizeof CCC->curr_user);
       NodeStr = NewStrBufPlain(node, nodelen);
       /* load the IGnet Configuration to check node validity */
       working_ignetcfg = load_ignetcfg();
       v = is_valid_node(&nexthop, &secret, NodeStr, working_ignetcfg, NULL);
       if (v != 0) {
              snprintf(err_buf, sizeof err_buf,
                     "An unknown Citadel server called \"%s\" attempted to connect from %s [%s].\n",
                     node, CC->cs_host, CC->cs_addr
              );
              syslog(LOG_WARNING, "%s", err_buf);
              cprintf("%d authentication failed\n", ERROR + PASSWORD_REQUIRED);
              CtdlAideMessage(err_buf, "IGNet Networking.");
              DeleteHash(&working_ignetcfg);
              FreeStrBuf(&NodeStr);
              return;
       }

       extract_token(CCC->user.password, cmdbuf, 1, '|', sizeof CCC->user.password);
       if (strcasecmp(CCC->user.password, ChrPtr(secret))) {
              snprintf(err_buf, sizeof err_buf,
                     "A Citadel server at %s [%s] failed to authenticate as network node \"%s\".\n",
                     CC->cs_host, CC->cs_addr, node
              );
              syslog(LOG_WARNING, "%s", err_buf);
              cprintf("%d authentication failed\n", ERROR + PASSWORD_REQUIRED);
              CtdlAideMessage(err_buf, "IGNet Networking.");
              DeleteHash(&working_ignetcfg);
              FreeStrBuf(&NodeStr);
              return;
       }

       if (network_talking_to(node, nodelen, NTT_CHECK)) {
              syslog(LOG_WARNING, "Duplicate session for network node <%s>", node);
              cprintf("%d Already talking to %s right now\n", ERROR + RESOURCE_BUSY, node);
              DeleteHash(&working_ignetcfg);
              FreeStrBuf(&NodeStr);
              return;
       }
       nodelen = safestrncpy(CC->net_node, node, sizeof CC->net_node);
       network_talking_to(CC->net_node, nodelen, NTT_ADD);
       syslog(LOG_NOTICE, "Network node <%s> logged in from %s [%s]\n",
              CC->net_node, CC->cs_host, CC->cs_addr
       );
       cprintf("%d authenticated as network node '%s'\n", CIT_OK, CC->net_node);
       DeleteHash(&working_ignetcfg);
       FreeStrBuf(&NodeStr);
}

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void cmd_snet ( char *  argbuf)

Definition at line 384 of file serv_netconfig.c.

                            {
       char tempfilename[PATH_MAX];
       char filename[PATH_MAX];
       int TmpFD;
       StrBuf *Line;
       struct stat StatBuf;
       long len;
       int rc;

       unbuffer_output();

       if ( (CC->room.QRflags & QR_MAILBOX) && (CC->user.usernum == atol(CC->room.QRname)) ) {
              /* users can edit the netconfigs for their own mailbox rooms */
       }
       else if (CtdlAccessCheck(ac_room_aide)) return;

       len = assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
       memcpy(tempfilename, filename, len + 1);

       memset(&StatBuf, 0, sizeof(struct stat));
       if ((stat(filename, &StatBuf)  == -1) || (StatBuf.st_size == 0))
              StatBuf.st_size = 80; /* Not there or empty? guess 80 chars line. */

       sprintf(tempfilename + len, ".%d", CC->cs_pid);
       errno = 0;
       TmpFD = open(tempfilename, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR);

       if ((TmpFD > 0) && (errno == 0))
       {
              char *tmp = malloc(StatBuf.st_size * 2);
              memset(tmp, ' ', StatBuf.st_size * 2);
              rc = write(TmpFD, tmp, StatBuf.st_size * 2);
              free(tmp);
              if ((rc <= 0) || (rc != StatBuf.st_size * 2))
              {
                     close(TmpFD);
                     cprintf("%d Unable to allocate the space required for %s: %s\n",
                            ERROR + INTERNAL_ERROR,
                            tempfilename,
                            strerror(errno));
                     unlink(tempfilename);
                     return;
              }      
              lseek(TmpFD, SEEK_SET, 0);
       }
       else {
              cprintf("%d Unable to allocate the space required for %s: %s\n",
                     ERROR + INTERNAL_ERROR,
                     tempfilename,
                     strerror(errno));
              unlink(tempfilename);
              return;
       }
       Line = NewStrBuf();

       cprintf("%d %s\n", SEND_LISTING, tempfilename);

       len = 0;
       while (rc = CtdlClientGetLine(Line), 
              (rc >= 0))
       {
              if ((rc == 3) && (strcmp(ChrPtr(Line), "000") == 0))
                     break;
              StrBufAppendBufPlain(Line, HKEY("\n"), 0);
              write(TmpFD, ChrPtr(Line), StrLength(Line));
              len += StrLength(Line);
       }
       FreeStrBuf(&Line);
       ftruncate(TmpFD, len);
       close(TmpFD);

       /* Now copy the temp file to its permanent location.
        * (We copy instead of link because they may be on different filesystems)
        */
       begin_critical_section(S_NETCONFIGS);
       rename(tempfilename, filename);
       end_critical_section(S_NETCONFIGS);
}

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CTDL_MODULE_INIT ( netconfig  )

Definition at line 570 of file serv_netconfig.c.

{
       if (!threading)
       {
              CtdlRegisterProtoHook(cmd_gnet, "GNET", "Get network config");
              CtdlRegisterProtoHook(cmd_snet, "SNET", "Set network config");
              CtdlRegisterProtoHook(cmd_netp, "NETP", "Identify as network poller");
       }
       return "netconfig";
}

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void DeleteNetMap ( void *  vNetMap)

Definition at line 172 of file serv_netconfig.c.

{
       NetMap *TheNetMap = (NetMap*) vNetMap;
       FreeStrBuf(&TheNetMap->NodeName);
       FreeStrBuf(&TheNetMap->NextHop);
       free(TheNetMap);
}

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void DeleteNodeConf ( void *  vNode)

Definition at line 96 of file serv_netconfig.c.

{
       NodeConf *Node = (NodeConf*) vNode;
       FreeStrBuf(&Node->NodeName);
       FreeStrBuf(&Node->Secret);
       FreeStrBuf(&Node->Host);
       FreeStrBuf(&Node->Port);
       free(Node);
}

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int is_valid_node ( const StrBuf **  nexthop,
const StrBuf **  secret,
StrBuf *  node,
HashList *  IgnetCfg,
HashList *  the_netmap 
)

Definition at line 299 of file serv_netconfig.c.

{
       void *vNetMap;
       void *vNodeConf;
       NodeConf *TheNode;
       NetMap *TheNetMap;

       if (StrLength(node) == 0) {
              return(-1);
       }

       /*
        * First try the neighbor nodes
        */
       if (GetCount(IgnetCfg) == 0) {
              syslog(LOG_INFO, "IgnetCfg is empty!\n");
              if (nexthop != NULL) {
                     *nexthop = NULL;
              }
              return(-1);
       }

       /* try to find a neigbour with the name 'node' */
       if (GetHash(IgnetCfg, SKEY(node), &vNodeConf) && 
           (vNodeConf != NULL))
       {
              TheNode = (NodeConf*)vNodeConf;
              if (secret != NULL)
                     *secret = TheNode->Secret;
              return 0;            /* yup, it's a direct neighbor */
       }

       /*
        * If we get to this point we have to see if we know the next hop
        *//* TODO: is the NodeName Uniq? */
       if ((GetCount(the_netmap) > 0) &&
           (GetHash(the_netmap, SKEY(node), &vNetMap)))
       {
              TheNetMap = (NetMap*)vNetMap;
              if (nexthop != NULL)
                     *nexthop = TheNetMap->NextHop;
              return(0);
       }

       /*
        * If we get to this point, the supplied node name is bogus.
        */
       syslog(LOG_ERR, "Invalid node name <%s>\n", ChrPtr(node));
       return(-1);
}

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HashList* load_ignetcfg ( void  )

Definition at line 136 of file serv_netconfig.c.

{
       const char *LinePos;
       char       *Cfg;
       StrBuf     *Buf;
       StrBuf     *LineBuf;
       HashList   *Hash;
       NodeConf   *Node;

       Cfg =  CtdlGetSysConfig(IGNETCFG);
       if ((Cfg == NULL) || IsEmptyStr(Cfg)) {
              if (Cfg != NULL)
                     free(Cfg);
              return NULL;
       }

       Hash = NewHash(1, NULL);
       Buf = NewStrBufPlain(Cfg, -1);
       free(Cfg);
       LineBuf = NewStrBufPlain(NULL, StrLength(Buf));
       LinePos = NULL;
       do
       {
              StrBufSipLine(LineBuf, Buf, &LinePos);
              if (StrLength(LineBuf) != 0) {
                     Node = NewNode(LineBuf);
                     if (Node != NULL) {
                            Put(Hash, SKEY(Node->NodeName), Node, DeleteNodeConf);
                     }
              }
       } while (LinePos != StrBufNOTNULL);
       FreeStrBuf(&Buf);
       FreeStrBuf(&LineBuf);
       return Hash;
}

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int netconfig_check_roomaccess ( char *  errmsgbuf,
size_t  n,
const char *  RemoteIdentifier 
)

Definition at line 531 of file serv_netconfig.c.

{
       SpoolControl *sc;
       char filename[SIZ];
       int found;

       if (RemoteIdentifier == NULL)
       {
              snprintf(errmsgbuf, n, "Need sender to permit access.");
              return (ERROR + USERNAME_REQUIRED);
       }

       assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
       begin_critical_section(S_NETCONFIGS);
       if (!read_spoolcontrol_file(&sc, filename))
       {
              end_critical_section(S_NETCONFIGS);
              snprintf(errmsgbuf, n,
                      "This mailing list only accepts posts from subscribers.");
              return (ERROR + NO_SUCH_USER);
       }
       end_critical_section(S_NETCONFIGS);
       found = is_recipient (sc, RemoteIdentifier);
       free_spoolcontrol_struct(&sc);
       if (found) {
              return (0);
       }
       else {
              snprintf(errmsgbuf, n,
                      "This mailing list only accepts posts from subscribers.");
              return (ERROR + NO_SUCH_USER);
       }
}

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void network_learn_topology ( char *  node,
char *  path,
HashList *  the_netmap,
int *  netmap_changed 
)

Definition at line 262 of file serv_netconfig.c.

{
       NetMap *pNM = NULL;
       void *vptr;
       char nexthop[256];
       NetMap *nmptr;

       if (GetHash(the_netmap, node, strlen(node), &vptr) && 
           (vptr != NULL))/* TODO: is the NodeName Uniq? */
       {
              pNM = (NetMap*)vptr;
              extract_token(nexthop, path, 0, '!', sizeof nexthop);
              if (!strcmp(nexthop, ChrPtr(pNM->NextHop))) {
                     pNM->lastcontact = time(NULL);
                     (*netmap_changed) ++;
                     return;
              }
       }

       /* If we got here then it's not in the map, so add it. */
       nmptr = (NetMap *) malloc(sizeof (NetMap));
       nmptr->NodeName = NewStrBufPlain(node, -1);
       nmptr->lastcontact = time(NULL);
       nmptr->NextHop = NewStrBuf ();
       StrBufExtract_tokenFromStr(nmptr->NextHop, path, strlen(path), 0, '!');
       /* TODO: is the NodeName Uniq? */
       Put(the_netmap, SKEY(nmptr->NodeName), nmptr, DeleteNetMap);
       (*netmap_changed) ++;
}

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NetMap* NewNetMap ( StrBuf *  SerializedNetMap)

Definition at line 180 of file serv_netconfig.c.

{
       const char *Pos = NULL;
       NetMap *NM;

       /* we need at least 3 pipes and some other text so its invalid. */
       if (StrLength(SerializedNetMap) < 6)
              return NULL;
       NM = (NetMap *) malloc(sizeof(NetMap));

       NM->NodeName=NewStrBuf();
       StrBufExtract_NextToken(NM->NodeName, SerializedNetMap, &Pos, '|');

       NM->lastcontact = StrBufExtractNext_long(SerializedNetMap, &Pos, '|');

       NM->NextHop=NewStrBuf();
       StrBufExtract_NextToken(NM->NextHop, SerializedNetMap, &Pos, '|');

       return NM;
}

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NodeConf* NewNode ( StrBuf *  SerializedNode)

Definition at line 106 of file serv_netconfig.c.

{
       const char *Pos = NULL;
       NodeConf *Node;

       /* we need at least 4 pipes and some other text so its invalid. */
       if (StrLength(SerializedNode) < 8)
              return NULL;
       Node = (NodeConf *) malloc(sizeof(NodeConf));

       Node->DeleteMe = 0;

       Node->NodeName=NewStrBuf();
       StrBufExtract_NextToken(Node->NodeName, SerializedNode, &Pos, '|');

       Node->Secret=NewStrBuf();
       StrBufExtract_NextToken(Node->Secret, SerializedNode, &Pos, '|');

       Node->Host=NewStrBuf();
       StrBufExtract_NextToken(Node->Host, SerializedNode, &Pos, '|');

       Node->Port=NewStrBuf();
       StrBufExtract_NextToken(Node->Port, SerializedNode, &Pos, '|');
       return Node;
}

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HashList* read_network_map ( void  )

Definition at line 201 of file serv_netconfig.c.

{
       const char *LinePos;
       char       *Cfg;
       StrBuf     *Buf;
       StrBuf     *LineBuf;
       HashList   *Hash;
       NetMap     *TheNetMap;

       Cfg =  CtdlGetSysConfig(IGNETMAP);
       if ((Cfg == NULL) || IsEmptyStr(Cfg)) {
              if (Cfg != NULL)
                     free(Cfg);
              return NULL;
       }

       Hash = NewHash(1, NULL);
       Buf = NewStrBufPlain(Cfg, -1);
       free(Cfg);
       LineBuf = NewStrBufPlain(NULL, StrLength(Buf));
       LinePos = NULL;
       while (StrBufSipLine(Buf, LineBuf, &LinePos))
       {
              TheNetMap = NewNetMap(LineBuf);
              if (TheNetMap != NULL) { /* TODO: is the NodeName Uniq? */
                     Put(Hash, SKEY(TheNetMap->NodeName), TheNetMap, DeleteNetMap);
              }
       }
       FreeStrBuf(&Buf);
       FreeStrBuf(&LineBuf);
       return Hash;
}

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StrBuf* SerializeNetworkMap ( HashList *  Map)

Definition at line 234 of file serv_netconfig.c.

{
       void *vMap;
       const char *key;
       long len;
       StrBuf *Ret = NewStrBuf();
       HashPos *Pos = GetNewHashPos(Map, 0);

       while (GetNextHashPos(Map, Pos, &len, &key, &vMap))
       {
              NetMap *pMap = (NetMap*) vMap;
              StrBufAppendBuf(Ret, pMap->NodeName, 0);
              StrBufAppendBufPlain(Ret, HKEY("|"), 0);

              StrBufAppendPrintf(Ret, "%ld", pMap->lastcontact, 0);
              StrBufAppendBufPlain(Ret, HKEY("|"), 0);

              StrBufAppendBuf(Ret, pMap->NextHop, 0);
              StrBufAppendBufPlain(Ret, HKEY("\n"), 0);
       }
       DeleteHashPos(&Pos);
       return Ret;
}

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