LCOV - code coverage report
Current view: top level - src/client - extra_comms.c (source / functions) Hit Total Coverage
Test: burp-coverage-clean.info Lines: 107 108 99.1 %
Date: 2017-08-31 Functions: 2 2 100.0 %

          Line data    Source code
       1             : #include "../burp.h"
       2             : #include "../asfd.h"
       3             : #include "../async.h"
       4             : #include "../cmd.h"
       5             : #include "../conf.h"
       6             : #include "../conffile.h"
       7             : #include "../handy.h"
       8             : #include "../incexc_recv.h"
       9             : #include "../incexc_send.h"
      10             : #include "../iobuf.h"
      11             : #include "../log.h"
      12             : #include "autoupgrade.h"
      13             : #include "extra_comms.h"
      14             : 
      15             : #ifndef HAVE_WIN32
      16             : #include <sys/utsname.h>
      17             : #endif
      18             : 
      19             : static const char *server_supports(const char *feat, const char *wanted)
      20             : {
      21         196 :         return strstr(feat, wanted);
      22             : }
      23             : 
      24          23 : static const char *server_supports_autoupgrade(const char *feat)
      25             : {
      26             :         // 1.3.0 servers did not list the features, but the only feature
      27             :         // that was supported was autoupgrade.
      28          23 :         if(!strcmp(feat, "extra_comms_begin ok")) return "ok";
      29          23 :         return server_supports(feat, ":autoupgrade:");
      30             : }
      31             : 
      32             : #include <librsync.h>
      33             : 
      34          26 : int extra_comms_client(struct async *as, struct conf **confs,
      35             :         enum action *action, char **incexc)
      36             : {
      37          26 :         int ret=-1;
      38          26 :         char *feat=NULL;
      39             :         struct asfd *asfd;
      40             :         struct iobuf *rbuf;
      41          26 :         const char *orig_client=NULL;
      42          26 :         asfd=as->asfd;
      43          26 :         rbuf=asfd->rbuf;
      44             : 
      45          26 :         if(asfd->write_str(asfd, CMD_GEN, "extra_comms_begin"))
      46             :         {
      47           1 :                 logp("Problem requesting extra_comms_begin\n");
      48           1 :                 goto end;
      49             :         }
      50             :         // Servers greater than 1.3.0 will list the extra_comms
      51             :         // features they support.
      52          25 :         if(asfd->read(asfd))
      53             :         {
      54           1 :                 logp("Problem reading response to extra_comms_begin\n");
      55           1 :                 goto end;
      56             :         }
      57          24 :         if(rbuf->cmd!=CMD_GEN
      58          24 :           || strncmp_w(rbuf->buf, "extra_comms_begin ok"))
      59             :         {
      60           1 :                 iobuf_log_unexpected(rbuf, __func__);
      61           1 :                 goto end;
      62             :         }
      63          23 :         feat=rbuf->buf;
      64          23 :         rbuf->buf=NULL;
      65          23 :         logp("%s\n", feat);
      66          23 :         iobuf_init(rbuf);
      67             : 
      68             :         // Can add extra bits here. The first extra bit is the
      69             :         // autoupgrade stuff.
      70          23 :         if(server_supports_autoupgrade(feat)
      71           1 :           && get_string(confs[OPT_AUTOUPGRADE_DIR])
      72           1 :           && get_string(confs[OPT_AUTOUPGRADE_OS])
      73           1 :           && autoupgrade_client(as, confs))
      74             :                 goto end;
      75             : 
      76             : 
      77             :         // :srestore: means that the server wants to do a restore.
      78          44 :         if(server_supports(feat, ":srestore:"))
      79             :         {
      80           4 :                 logp("Server wants to initiate a restore\n");
      81           4 :                 if(*action==ACTION_MONITOR)
      82             :                 {
      83           1 :                         logp("Client is in monitor mode, so ignoring\n");
      84             :                 }
      85           3 :                 else if(get_int(confs[OPT_SERVER_CAN_RESTORE]))
      86             :                 {
      87           2 :                         logp("Client accepts.\n");
      88           2 :                         if(incexc_recv_client_restore(asfd, incexc, confs))
      89             :                                 goto end;
      90           2 :                         if(*incexc)
      91             :                         {
      92           2 :                                 if(conf_parse_incexcs_buf(confs, *incexc))
      93             :                                         goto end;
      94           2 :                                 *action=ACTION_RESTORE;
      95           2 :                                 log_restore_settings(confs, 1);
      96             :                         }
      97             :                 }
      98             :                 else
      99             :                 {
     100           1 :                         logp("Client configuration says no\n");
     101           1 :                         if(asfd->write_str(asfd, CMD_GEN, "srestore not ok"))
     102             :                                 goto end;
     103             :                 }
     104             :         }
     105             : 
     106             :         // Needs to be after the srestore stuff, as the server may set
     107             :         // orig_client in the server-initiated restore file.
     108          22 :         if((orig_client=get_string(confs[OPT_ORIG_CLIENT])))
     109             :         {
     110           4 :                 char str[512]="";
     111             :                 snprintf(str, sizeof(str), "orig_client=%s", orig_client);
     112           8 :                 if(!server_supports(feat, ":orig_client:"))
     113             :                 {
     114           1 :                         logp("Server does not support switching client.\n");
     115           1 :                         goto end;
     116             :                 }
     117           3 :                 if(asfd->write_str(asfd, CMD_GEN, str)
     118           3 :                   || asfd_read_expect(asfd, CMD_GEN, "orig_client ok"))
     119             :                 {
     120           1 :                         logp("Problem requesting %s\n", str);
     121           1 :                         goto end;
     122             :                 }
     123           2 :                 logp("Switched to client %s\n", orig_client);
     124             :         }
     125             : 
     126             :         // :sincexc: is for the server giving the client the
     127             :         // incexc config.
     128          40 :         if(*action==ACTION_BACKUP
     129          20 :           || *action==ACTION_BACKUP_TIMED
     130           3 :           || *action==ACTION_TIMER_CHECK)
     131             :         {
     132          34 :                 if(!*incexc && server_supports(feat, ":sincexc:"))
     133             :                 {
     134           2 :                         logp("Server is setting includes/excludes.\n");
     135           2 :                         if(get_int(confs[OPT_SERVER_CAN_OVERRIDE_INCLUDES]))
     136             :                         {
     137           1 :                                 logp("Client accepts.\n");
     138           1 :                                 if(incexc_recv_client(asfd, incexc, confs))
     139             :                                         goto end;
     140           1 :                                 if(*incexc && conf_parse_incexcs_buf(confs,
     141             :                                         *incexc)) goto end;
     142             :                         }
     143             :                         else
     144             :                         {
     145           1 :                                 logp("Client configuration says no\n");
     146             :                         }
     147             :                 }
     148             :         }
     149             : 
     150          40 :         if(server_supports(feat, ":counters_json:"))
     151             :         {
     152           1 :                 if(asfd->write_str(asfd, CMD_GEN, "counters_json ok"))
     153             :                         goto end;
     154           1 :                 set_int(confs[OPT_SEND_CLIENT_CNTR], 1);
     155             :         }
     156             : 
     157             :         // :incexc: is for the client sending the server the
     158             :         // incexc conf so that it better knows what to do on
     159             :         // resume.
     160          40 :         if(server_supports(feat, ":incexc:")
     161           0 :           && incexc_send_client(asfd, confs))
     162             :                 goto end;
     163             : 
     164          40 :         if(server_supports(feat, ":uname:"))
     165             :         {
     166           1 :                 const char *clientos=NULL;
     167             : #ifdef HAVE_WIN32
     168             : #ifdef _WIN64
     169             :                 clientos="Windows 64bit";
     170             : #else
     171             :                 clientos="Windows 32bit";
     172             : #endif
     173             : #else
     174             :                 struct utsname utsname;
     175           1 :                 if(!uname(&utsname))
     176           1 :                         clientos=(const char *)utsname.sysname;
     177             : #endif
     178           1 :                 if(clientos)
     179             :                 {
     180           1 :                         char msg[128]="";
     181             :                         snprintf(msg, sizeof(msg),
     182             :                                 "uname=%s", clientos);
     183           1 :                         if(asfd->write_str(asfd, CMD_GEN, msg))
     184             :                                 goto end;
     185             :                 }
     186             :         }
     187             : 
     188          40 :         if(server_supports(feat, ":csetproto:"))
     189             :         {
     190           3 :                 char msg[128]="";
     191             :                 // Use protocol1 if no choice has been made on client side.
     192           3 :                 if(get_protocol(confs)==PROTO_AUTO)
     193             :                 {
     194           1 :                         logp("Server has protocol=0 (auto)\n");
     195           1 :                         set_protocol(confs, PROTO_1);
     196             :                 }
     197             :                 // Send choice to server.
     198             :                 snprintf(msg, sizeof(msg), "protocol=%d",
     199           3 :                         get_protocol(confs));
     200           3 :                 if(asfd->write_str(asfd, CMD_GEN, msg))
     201             :                         goto end;
     202           3 :                 logp("Using protocol=%d\n",
     203           3 :                         get_protocol(confs));
     204             :         }
     205          34 :         else if(server_supports(feat, ":forceproto=1:"))
     206             :         {
     207           2 :                 logp("Server is forcing protocol 1\n");
     208           2 :                 if(get_protocol(confs)!=PROTO_AUTO
     209           2 :                   && get_protocol(confs)!=PROTO_1)
     210             :                 {
     211           1 :                         logp("But client has set protocol=%d!\n",
     212           1 :                                 get_protocol(confs));
     213           1 :                         goto end;
     214             :                 }
     215           1 :                 set_protocol(confs, PROTO_1);
     216             :         }
     217          30 :         else if(server_supports(feat, ":forceproto=2:"))
     218             :         {
     219           2 :                 logp("Server is forcing protocol 2\n");
     220           2 :                 if(get_protocol(confs)!=PROTO_AUTO
     221           2 :                   && get_protocol(confs)!=PROTO_2)
     222             :                 {
     223           1 :                         logp("But client has set protocol=%d!\n",
     224           1 :                                 get_protocol(confs));
     225           1 :                         goto end;
     226             :                 }
     227           1 :                 set_protocol(confs, PROTO_2);
     228             :         }
     229             : 
     230          36 :         if(server_supports(feat, ":msg:"))
     231             :         {
     232           1 :                 set_int(confs[OPT_MESSAGE], 1);
     233           1 :                 if(asfd->write_str(asfd, CMD_GEN, "msg"))
     234             :                         goto end;
     235             :         }
     236             : 
     237             : #ifndef RS_DEFAULT_STRONG_LEN
     238             :         if(server_supports(feat, ":rshash=blake2:"))
     239             :         {
     240             :                 set_e_rshash(confs[OPT_RSHASH], RSHASH_BLAKE2);
     241             :                 // Send choice to server.
     242             :                 if(asfd->write_str(asfd, CMD_GEN, "rshash=blake2"))
     243             :                         goto end;
     244             :         }
     245             :         else
     246             : #endif
     247          18 :                 set_e_rshash(confs[OPT_RSHASH], RSHASH_MD4);
     248             : 
     249          18 :         if(asfd->write_str(asfd, CMD_GEN, "extra_comms_end")
     250          18 :           || asfd_read_expect(asfd, CMD_GEN, "extra_comms_end ok"))
     251             :         {
     252           1 :                 logp("Problem requesting extra_comms_end\n");
     253           1 :                 goto end;
     254             :         }
     255             : 
     256             :         ret=0;
     257             : end:
     258          26 :         free_w(&feat);
     259          26 :         return ret;
     260             : }

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