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309 lines
12 KiB
C
309 lines
12 KiB
C
/*
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Serval Distributed Numbering Architecture (DNA)
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Copyright (C) 2010 Paul Gardner-Stephen
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "serval.h"
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#include "rhizome.h"
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#include <unistd.h>
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int usage(char *complaint)
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{
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fprintf(stderr,"dna: %s\n",complaint);
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fprintf(stderr,"usage:\n");
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fprintf(stderr," dna [-v <flags>] -S [-f keyring file] [-N interface,...] [-G gateway specification] [-r rhizome path]\n");
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fprintf(stderr,"or\n");
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fprintf(stderr," dna -r <rhizome path> -M <manifest name>\n");
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fprintf(stderr,"or\n");
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fprintf(stderr," dna <-d|-s> id -A\n");
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fprintf(stderr,"or\n");
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fprintf(stderr," dna <-d|-s> id [-p pin] [-i variable instance] <-R variable[=value]>\n");
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fprintf(stderr," [-v <flags>] [-t request timeout in ms] [-O output file name template]\n");
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fprintf(stderr,"or\n");
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fprintf(stderr," dna <-d|-s> id [-p pin] [-i variable instance] <-W|-U|-D variable[=[$|@]value]>\n");
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fprintf(stderr," [-v <flags>] [-t request timeout in ms]\n");
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fprintf(stderr,"or\n");
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fprintf(stderr," dna [-v <flags>] [-t timeout] -d did -C\n");
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fprintf(stderr,"or\n");
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fprintf(stderr," dna [-v <flags>] -f <keyring file> -E <export.txt>\n");
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fprintf(stderr,"\n");
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fprintf(stderr," -v - Set verbosity.\n");
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fprintf(stderr," -A - Ask for address of subscriber.\n");
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fprintf(stderr," -b - Specify BATMAN socket to obtain peer list (flaky).\n");
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fprintf(stderr," -l - Specify BATMAN socket to obtain peer list (better, but requires Serval patched BATMAN).\n");
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fprintf(stderr," -L - Log mesh statistics to specified file.\n");
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fprintf(stderr," -m - Return multiple variable values instead of only first response.\n");
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fprintf(stderr," -M - Create and import a new bundle from the specified manifest.\n");
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fprintf(stderr," -n - Do not detach from foreground in server mode.\n");
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fprintf(stderr," -S - Run in server mode.\n");
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fprintf(stderr," -f - Location of keyring file.\n");
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fprintf(stderr," -d - Search by Direct Inward Dial (DID) number.\n");
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fprintf(stderr," -s - Search by Subscriber ID (SID) number.\n");
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fprintf(stderr," -p - Specify additional DNA nodes to query.\n");
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fprintf(stderr," -P - Authenticate using the supplied pin.\n");
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fprintf(stderr," -r - Enable Rhizome store-and-forward transport using the specified data store directory.\n");
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fprintf(stderr," To limit the storage: echo space=[KB] > path/rhizome.conf\n");
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fprintf(stderr," -R - Read a variable value.\n");
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fprintf(stderr," -O - Place read variable value into files using argument as a template.\n");
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fprintf(stderr," The following template codes can be used (interpretted by sprintf):\n");
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fprintf(stderr," %%1$s - Subscriber ID\n");
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fprintf(stderr," %%2$d - Variable ID (0-255)\n");
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fprintf(stderr," %%3$d - Variable instance number (0-255)\n");
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fprintf(stderr," -W - Write a variable value, keeping previous values.\n");
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fprintf(stderr," -U - Update a variable value, replacing the previous value.\n");
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fprintf(stderr," -D - Delete a variable value.\n");
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fprintf(stderr," $value means interpret value as hexidecimal bytes.\n");
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fprintf(stderr," @value means read value from file called value.\n");
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fprintf(stderr," -C - Request the creation of a new subscriber with the specified DID.\n");
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fprintf(stderr," -t - Specify the request timeout period.\n");
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fprintf(stderr," -G - Offer gateway services. Argument specifies locations of necessary files.\n");
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fprintf(stderr," Use -G [potato|android|custom:...] to set defaults for your device type.\n");
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fprintf(stderr," -N - Specify one or more interfaces for the DNA overlay mesh to operate.\n");
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fprintf(stderr," Interface specifications take the form <+|->[interface[=type][,...]\n");
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fprintf(stderr," e.g., -N -en0,+ to use all interfaces except en0\n");
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fprintf(stderr,"\n");
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exit(-1);
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}
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int parseOldCommandLine(int argc, char **argv)
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{
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int c;
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//char *pin=NULL;
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char *did=NULL;
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char *sid=NULL;
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char *keyring_file=NULL;
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int instance=-1;
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int foregroundMode=0;
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int clientMode=0;
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WARNF("The use of the old command line structure is being deprecated.");
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WARNF("Type '%s help' to learn about the new command line structure.", argv[0]);
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while ((c = getopt(argc,argv,"Ab:B:E:G:I:Sf:d:i:l:L:mnp:P:r:s:t:v:R:W:U:D:CO:M:N:")) != -1) {
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switch(c)
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{
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case 'S': serverMode=1; break;
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case 'r': /* Enable rhizome */
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if (rhizome_datastore_path) return WHY("-r specified more than once");
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rhizome_datastore_path=optarg;
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rhizome_opendb();
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/* Also set keyring file to be in the Rhizome directory, to save the need to specify it
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separately. */
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char temp[1024];
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if (snprintf(temp, sizeof(temp), "%s/serval.keyring", optarg)
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>= sizeof(temp))
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exit(WHY("Rhizome directory name too long."));
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keyring_file = strdup(temp);
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break;
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case 'M': /* Distribute specified manifest and file pair using Rhizome. */
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/* This option assumes that the manifest is locally produced, and will
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create any appropriate signatures, replacing any old signatures on the
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manifest.
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A different calling would be required to import an existing pre-signed
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manifest */
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return rhizome_bundle_import(NULL, NULL, optarg,
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NULL /* no groups - XXX should allow them */,
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255 /* ttl - XXX should read from somewhere,
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e.g., bar if being imported */,
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0 /* int verifyP */,
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1 /* int checkFileP */,
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1 /* int signP */);
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break;
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case 'm': returnMultiVars=1; break;
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case 'N': /* Ask for overlay network to setup one or more interfaces */
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if (overlay_interface_args(optarg))
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return WHY("Invalid interface specification(s) passed to -N");
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overlayMode=1;
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break;
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case 'G': /* Offer gateway services */
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gatewayspec=strdup(optarg);
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if(prepareGateway(gatewayspec)) return usage("Invalid gateway specification");
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break;
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case 'n': /* don't detach from foreground in server mode */
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foregroundMode=1; break;
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case 'b': /* talk peers on a BATMAN mesh */
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batman_socket=strdup(optarg);
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break;
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case 'l': /* talk peers on a BATMAN mesh */
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batman_peerfile=strdup(optarg);
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break;
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case 'L':
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instrumentation_file=strdup(optarg);
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break;
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case 'B': /* Set simulated Bit Error Rate for bench-testing */
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simulatedBER=atof(optarg);
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fprintf(stderr,"WARNING: Bit error injection enabled -- this will cause packet loss and is intended only for testing.\n");
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break;
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case 'i':
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instance=atoi(optarg);
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if (instance<-1||instance>255) usage("Illegal variable instance ID.");
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break;
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case 'f':
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if (clientMode) usage("Only servers use keyring files");
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keyring_file=strdup(optarg);
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break;
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case 'p': /* additional peers to query */
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if (additionalPeer(optarg)) exit(-3);
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break;
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case 'P': /* Supply pin */
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//pin=strdup(optarg);
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clientMode=1;
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break;
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case 'd': /* Ask by DID */
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clientMode=1;
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did=strdup(optarg);
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break;
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case 's': /* Ask by subscriber ID */
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clientMode=1;
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sid=strdup(optarg);
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break;
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case 't': /* request timeout (ms) */
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timeout=atoi(optarg);
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break;
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case 'v': /* set verbosity */
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debug |= debugFlagMask(optarg);
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break;
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case 'A': /* get address (IP or otherwise) of a given peer */
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peerAddress(did,sid,3 /* 1 = print list of addresses to stdout, 2 = set peer list to responders */);
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break;
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case 'R': /* read a variable */
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{
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unsigned char buffer[65535];
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int len=0;
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requestItem(did,sid,(char *)optarg,instance,buffer,sizeof(buffer),&len,NULL);
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}
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break;
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case 'W': /* write a variable */
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{
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int var_id;
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unsigned char value[65536];
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int value_len=65535;
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if (parseAssignment((unsigned char *)optarg,&var_id,value,&value_len)) return -1;
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value[value_len]=0;
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return writeItem(did?did:sid,var_id,instance,value,0,value_len,SET_NOREPLACE,-1,NULL);
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}
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break;
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case 'U': /* write or update a variable */
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{
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int var_id;
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unsigned char value[65536];
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int value_len=65535;
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if (parseAssignment((unsigned char *)optarg,&var_id,value,&value_len)) return -1;
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value[value_len]=0;
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return writeItem(did?did:sid,var_id,instance,value,0,value_len,SET_REPLACE,-1,NULL);
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}
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break;
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case 'C': /* create a new keyring entry */
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return WHY("Entries in new keyring format must be used with new command line framework.");
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break;
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case 'O': /* output to templated files */
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if (outputtemplate) usage("You can only specify -O once");
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outputtemplate=strdup(optarg);
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break;
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default:
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usage("Invalid option");
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break;
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}
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}
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if (optind<argc) usage("Extraneous options at end of command");
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if (keyring_file&&clientMode) usage("Only servers use backing files");
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if (serverMode&&clientMode) usage("You asked me to be both server and client. That's silly.");
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if (serverMode) {
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if (!foregroundMode)
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daemon(0,0);
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return server(keyring_file);
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}
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if (!clientMode) usage("Serval server and client utility.");
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/* Client mode: */
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return 0;
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}
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int parseAssignment(unsigned char *text,int *var_id,unsigned char *value,int *value_len)
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{
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/* Parse an assignment.
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Valid formats are:
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var=@file - value comes from named file.
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var=[[$]value] - value comes from string, and may be empty. $ means value is in hex
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Values are length limited to 65535 bytes.
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*/
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int i;
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int max_len=*value_len;
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int vlen=0;
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int tlen=strlen((char *)text);
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if (tlen>3072) {
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return setReason("Variable assignment string is too long, use =@file to read value from a file");
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}
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/* Identify which variable */
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*var_id=-1;
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for(i=0;i<tlen;i++) if (text[i]=='=') break;
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/* Go through known keyring variables */
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if (!strcasecmp((char *)text,"did")) *var_id=KEYTYPE_DID;
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if (*var_id==-1) return setReason("Illegal variable name in assignment");
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i++;
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switch(text[i])
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{
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case '$': /* hex */
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i++;
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while(i<tlen) {
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int b=hexvalue(text[i++])<<4;
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if (i>=tlen) return setReason("Variable value has an odd number of hex digits.");
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b|=hexvalue(text[i++]);
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if (b<0) return setReason("That doesn't look like hex to me");
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if (vlen>=max_len) return setReason("Variable hex value too long");
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value[vlen++]=b;
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}
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*value_len=vlen;
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return 0;
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break;
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case '@': /* file */
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{
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FILE *f=fopen((char *)&text[i+1],"r");
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int flen;
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fseek(f,0,SEEK_END);
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flen=ftell(f);
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if (flen>max_len) return setReason("Variable value from file too long");
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fseek(f,0,SEEK_SET);
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vlen=fread(value,1,flen,f);
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if (vlen!=flen) return setReason("Could not read all of file");
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fclose(f);
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*value_len=vlen;
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return 0;
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}
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break;
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default: /* literal string */
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vlen=strlen((char *)&text[i]);
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if (vlen>max_len) return setReason("Variable value too long");
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bcopy(&text[i],value,vlen);
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*value_len=vlen;
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return 0;
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}
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return 0;
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}
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