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serval-dna/dna.c
Andrew Bettison 881576212c Fix all trivial compiler warnings
2012-05-10 18:08:59 +09:30

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/*
Serval Distributed Numbering Architecture (DNA)
Copyright (C) 2010 Paul Gardner-Stephen
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "serval.h"
#include "rhizome.h"
#include <signal.h>
#include <unistd.h>
#include <dirent.h>
char *gatewayspec=NULL;
char *outputtemplate=NULL;
char *instrumentation_file=NULL;
char *importFile=NULL;
int debug=0;
int timeout=3000; /* 3000ms request timeout */
int serverMode=0;
int clientMode=0;
int returnMultiVars=0;
int hexdigit[16]={'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
int sock=-1;
#ifndef HAVE_BZERO
/* OpenWRT doesn't have bzero */
void bzero(void *m,size_t len)
{
unsigned char *c=m;
int i;
for(i=0;i<len;i++) c[i]=0;
}
#endif
int dump(char *name,unsigned char *addr,int len)
{
int i,j;
fprintf(stderr,"Dump of %s\n",name);
for(i=0;i<len;i+=16)
{
fprintf(stderr," %04x :",i);
for(j=0;j<16&&(i+j)<len;j++) fprintf(stderr," %02x",addr[i+j]);
for(;j<16;j++) fprintf(stderr," ");
fprintf(stderr," ");
for(j=0;j<16&&(i+j)<len;j++) fprintf(stderr,"%c",addr[i+j]>=' '&&addr[i+j]<0x7f?addr[i+j]:'.');
fprintf(stderr,"\n");
}
return 0;
}
int dumpResponses(struct response_set *responses)
{
struct response *r;
if (!responses) {fprintf(stderr,"Response set is NULL\n"); return 0; }
fprintf(stderr,"Response set claims to contain %d entries.\n",responses->response_count);
r=responses->responses;
while(r)
{
fprintf(stderr," response code 0x%02x\n",r->code);
if (r->next)
if (r->next->prev!=r) fprintf(stderr," !! response chain is broken\n");
r=r->next;
}
return 0;
}
#ifdef ANDROID
#include <android/log.h>
#endif
void logMessage(int level, char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vlogMessage(level, fmt, ap);
}
void vlogMessage(int level, char *fmt, va_list ap)
{
va_list ap2;
char buf[8192];
va_copy(ap2, ap);
vsnprintf(buf, sizeof buf, fmt, ap2);
va_end(ap);
buf[sizeof buf - 1] = '\0';
#ifdef ANDROID
int alevel = ANDROID_LOG_UNKNOWN;
switch (level) {
case LOG_LEVEL_FATAL: alevel = ANDROID_LOG_FATAL; break;
case LOG_LEVEL_ERROR: alevel = ANDROID_LOG_ERROR; break;
case LOG_LEVEL_INFO: alevel = ANDROID_LOG_INFO; break;
case LOG_LEVEL_WARN: alevel = ANDROID_LOG_WARN; break;
case LOG_LEVEL_DEBUG: alevel = ANDROID_LOG_DEBUG; break;
}
__android_log_print(alevel, "servald", "%s", buf);
#endif
const char *levelstr = "UNKNOWN";
switch (level) {
case LOG_LEVEL_FATAL: levelstr = "FATAL"; break;
case LOG_LEVEL_ERROR: levelstr = "ERROR"; break;
case LOG_LEVEL_INFO: levelstr = "INFO"; break;
case LOG_LEVEL_WARN: levelstr = "WARN"; break;
case LOG_LEVEL_DEBUG: levelstr = "DEBUG"; break;
}
fprintf(stderr, "%s: %s\n", levelstr, buf);
}
int setReason(char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vlogMessage(LOG_LEVEL_ERROR, fmt, ap);
return -1;
}
int hexvalue(unsigned char c)
{
if (c>='0'&&c<='9') return c-'0';
if (c>='A'&&c<='F') return c-'A'+10;
if (c>='a'&&c<='f') return c-'a'+10;
return setReason("Invalid hex digit in SID");
}
int parseAssignment(unsigned char *text,int *var_id,unsigned char *value,int *value_len)
{
/* Parse an assignment.
Valid formats are:
var=@file - value comes from named file.
var=[[$]value] - value comes from string, and may be empty. $ means value is in hex
Values are length limited to 65535 bytes.
*/
int i;
int max_len=*value_len;
int vlen=0;
int tlen=strlen((char *)text);
if (tlen>3072) {
return setReason("Variable assignment string is too long, use =@file to read value from a file");
}
/* Identify which variable */
*var_id=-1;
for(i=0;i<tlen;i++) if (text[i]=='=') break;
/* Go through known keyring variables */
if (!strcasecmp((char *)text,"did")) *var_id=KEYTYPE_DID;
if (*var_id==-1) return setReason("Illegal variable name in assignment");
i++;
switch(text[i])
{
case '$': /* hex */
i++;
while(i<tlen) {
int b=hexvalue(text[i++])<<4;
if (i>=tlen) return setReason("Variable value has an odd number of hex digits.");
b|=hexvalue(text[i++]);
if (b<0) return setReason("That doesn't look like hex to me");
if (vlen>=max_len) return setReason("Variable hex value too long");
value[vlen++]=b;
}
*value_len=vlen;
return 0;
break;
case '@': /* file */
{
FILE *f=fopen((char *)&text[i+1],"r");
int flen;
fseek(f,0,SEEK_END);
flen=ftell(f);
if (flen>max_len) return setReason("Variable value from file too long");
fseek(f,0,SEEK_SET);
vlen=fread(value,1,flen,f);
if (vlen!=flen) return setReason("Could not read all of file");
fclose(f);
*value_len=vlen;
return 0;
}
break;
default: /* literal string */
vlen=strlen((char *)&text[i]);
if (vlen>max_len) return setReason("Variable value too long");
bcopy(&text[i],value,vlen);
*value_len=vlen;
return 0;
}
return 0;
}
int usage(char *complaint)
{
fprintf(stderr,"dna: %s\n",complaint);
fprintf(stderr,"usage:\n");
fprintf(stderr," dna [-v <flags>] -S [-f keyring file] [-N interface,...] [-G gateway specification] [-r rhizome path]\n");
fprintf(stderr,"or\n");
fprintf(stderr," dna -r <rhizome path> -M <manifest name>\n");
fprintf(stderr,"or\n");
fprintf(stderr," dna <-d|-s> id -A\n");
fprintf(stderr,"or\n");
fprintf(stderr," dna <-d|-s> id [-p pin] [-i variable instance] <-R variable[=value]>\n");
fprintf(stderr," [-v <flags>] [-t request timeout in ms] [-O output file name template]\n");
fprintf(stderr,"or\n");
fprintf(stderr," dna <-d|-s> id [-p pin] [-i variable instance] <-W|-U|-D variable[=[$|@]value]>\n");
fprintf(stderr," [-v <flags>] [-t request timeout in ms]\n");
fprintf(stderr,"or\n");
fprintf(stderr," dna [-v <flags>] [-t timeout] -d did -C\n");
fprintf(stderr,"or\n");
fprintf(stderr," dna [-v <flags>] -f <keyring file> -E <export.txt>\n");
fprintf(stderr,"\n");
fprintf(stderr," -v - Set verbosity.\n");
fprintf(stderr," -A - Ask for address of subscriber.\n");
fprintf(stderr," -b - Specify BATMAN socket to obtain peer list (flaky).\n");
fprintf(stderr," -l - Specify BATMAN socket to obtain peer list (better, but requires Serval patched BATMAN).\n");
fprintf(stderr," -L - Log mesh statistics to specified file.\n");
fprintf(stderr," -m - Return multiple variable values instead of only first response.\n");
fprintf(stderr," -M - Create and import a new bundle from the specified manifest.\n");
fprintf(stderr," -n - Do not detach from foreground in server mode.\n");
fprintf(stderr," -S - Run in server mode.\n");
fprintf(stderr," -f - Location of keyring file.\n");
fprintf(stderr," -d - Search by Direct Inward Dial (DID) number.\n");
fprintf(stderr," -s - Search by Subscriber ID (SID) number.\n");
fprintf(stderr," -p - Specify additional DNA nodes to query.\n");
fprintf(stderr," -P - Authenticate using the supplied pin.\n");
fprintf(stderr," -r - Enable Rhizome store-and-forward transport using the specified data store directory.\n");
fprintf(stderr," To limit the storage: echo space=[KB] > path/rhizome.conf\n");
fprintf(stderr," -R - Read a variable value.\n");
fprintf(stderr," -O - Place read variable value into files using argument as a template.\n");
fprintf(stderr," The following template codes can be used (interpretted by sprintf):\n");
fprintf(stderr," %%1$s - Subscriber ID\n");
fprintf(stderr," %%2$d - Variable ID (0-255)\n");
fprintf(stderr," %%3$d - Variable instance number (0-255)\n");
fprintf(stderr," -W - Write a variable value, keeping previous values.\n");
fprintf(stderr," -U - Update a variable value, replacing the previous value.\n");
fprintf(stderr," -D - Delete a variable value.\n");
fprintf(stderr," $value means interpret value as hexidecimal bytes.\n");
fprintf(stderr," @value means read value from file called value.\n");
fprintf(stderr," -C - Request the creation of a new subscriber with the specified DID.\n");
fprintf(stderr," -t - Specify the request timeout period.\n");
fprintf(stderr," -G - Offer gateway services. Argument specifies locations of necessary files.\n");
fprintf(stderr," Use -G [potato|android|custom:...] to set defaults for your device type.\n");
fprintf(stderr," -N - Specify one or more interfaces for the DNA overlay mesh to operate.\n");
fprintf(stderr," Interface specifications take the form <+|->[interface[=type][,...]\n");
fprintf(stderr," e.g., -N -en0,+ to use all interfaces except en0\n");
fprintf(stderr,"\n");
exit(-1);
}
#ifndef DNA_NO_MAIN
const char *thisinstancepath=NULL;
const char *serval_instancepath()
{
if (thisinstancepath) return thisinstancepath;
const char *instancepath=getenv("SERVALINSTANCE_PATH");
if (!instancepath) instancepath=DEFAULT_INSTANCE_PATH;
return instancepath;
}
int form_serval_instance_path(char *buf, size_t bufsiz, const char *path)
{
if (snprintf(buf, bufsiz, "%s/%s", serval_instancepath(), path) < bufsiz)
return 1;
setReason("Cannot form pathname \"%s/%s\" -- buffer too small (%lu bytes)", serval_instancepath(), path, (unsigned long)bufsiz);
return 0;
}
int create_serval_instance_dir() {
const char *instancepath = serval_instancepath();
if (mkdir(instancepath, 0700) == -1) {
if (errno == EEXIST) {
DIR *d = opendir(instancepath);
if (!d) {
WHYF("Cannot access %s", instancepath);
return WHY_perror("opendir");
}
closedir(d);
return 0;
}
WHYF("Cannot mkdir %s", instancepath);
return WHY_perror("mkdir");
}
return 0;
}
int setVerbosity(const char *optarg) {
long long old_debug=debug;
debug=strtoll(optarg,NULL,10);
if (strstr(optarg,"interfaces")) debug|=DEBUG_OVERLAYINTERFACES;
if (strstr(optarg,"rx")) debug|=DEBUG_PACKETRX;
if (strstr(optarg,"tx")) debug|=DEBUG_PACKETTX;
if (strstr(optarg,"verbose")) debug|=DEBUG_VERBOSE;
if (strstr(optarg,"verbio")) debug|=DEBUG_VERBOSE_IO;
if (strstr(optarg,"peers")) debug|=DEBUG_PEERS;
if (strstr(optarg,"dnaresponses")) debug|=DEBUG_DNARESPONSES;
if (strstr(optarg,"dnarequests")) debug|=DEBUG_DNAREQUESTS;
if (strstr(optarg,"simulation")) debug|=DEBUG_SIMULATION;
if (strstr(optarg,"dnavars")) debug|=DEBUG_DNAVARS;
if (strstr(optarg,"packetformats")) debug|=DEBUG_PACKETFORMATS;
if (strstr(optarg,"packetconstruction")) debug|=DEBUG_PACKETCONSTRUCTION;
if (strstr(optarg,"gateway")) debug|=DEBUG_GATEWAY;
if (strstr(optarg,"hlr")) debug|=DEBUG_HLR;
if (strstr(optarg,"sockio")) debug|=DEBUG_IO;
if (strstr(optarg,"frames")) debug|=DEBUG_OVERLAYFRAMES;
if (strstr(optarg,"abbreviations")) debug|=DEBUG_OVERLAYABBREVIATIONS;
if (strstr(optarg,"routing")) debug|=DEBUG_OVERLAYROUTING;
if (strstr(optarg,"security")) debug|=DEBUG_SECURITY;
if (strstr(optarg,"rhizome")) debug|=DEBUG_RHIZOME;
if (strstr(optarg,"norhizome"))
{ debug|=DEBUG_DISABLERHIZOME; debug&=~DEBUG_RHIZOME; }
if (strstr(optarg,"filesync")) debug|=DEBUG_RHIZOMESYNC;
if (strstr(optarg,"monitorroutes")) debug|=DEBUG_OVERLAYROUTEMONITOR;
if (strstr(optarg,"queues")) debug|=DEBUG_QUEUES;
if (strstr(optarg,"broadcasts")) debug|=DEBUG_BROADCASTS;
if (old_debug==debug && optarg[0]) {
fprintf(stderr,"WARNING: Option '%s' had no effect on existing debug/verbosity level.\n",
optarg);
}
return 0;
}
int main(int argc, char **argv)
{
int c;
//char *pin=NULL;
char *did=NULL;
char *sid=NULL;
char *keyring_file=NULL;
int instance=-1;
int foregroundMode=0;
#if defined WIN32
WSADATA wsa_data;
WSAStartup(MAKEWORD(1,1), &wsa_data);
#endif
memabuseInit();
srandomdev();
server_save_argv(argc, (const char*const*)argv);
if (argv[1]&&argv[1][0]!='-') {
/* First argument doesn't start with a dash, so assume it is for the new command line
parser. */
/* Don't include name of program in arguments */
int return_value = parseCommandLine(argc - 1, (const char*const*)&argv[1]);
#if defined WIN32
WSACleanup();
#endif
return return_value;
}
fprintf(stderr,
"WARNING: The use of the old command line structure is being deprecated.\n"
" Type '%s help' to learn about the new command line structure.\n",
argv[0]);
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 )
{
switch(c)
{
case 'S': serverMode=1; break;
case 'r': /* Enable rhizome */
if (rhizome_datastore_path) return WHY("-r specified more than once");
rhizome_datastore_path=optarg;
rhizome_opendb();
/* Also set keyring file to be in the Rhizome directory, to save the need to specify it
separately. */
char temp[1024];
if (snprintf(temp, sizeof(temp), "%s/serval.keyring", optarg)
>= sizeof(temp))
exit(WHY("Rhizome directory name too long."));
keyring_file = strdup(temp);
break;
case 'M': /* Distribute specified manifest and file pair using Rhizome. */
/* This option assumes that the manifest is locally produced, and will
create any appropriate signatures, replacing any old signatures on the
manifest.
A different calling would be required to import an existing pre-signed
manifest */
return rhizome_bundle_import(NULL, NULL, optarg,
NULL /* no groups - XXX should allow them */,
255 /* ttl - XXX should read from somewhere,
e.g., bar if being imported */,
0 /* int verifyP */,
1 /* int checkFileP */,
1 /* int signP */);
break;
case 'm': returnMultiVars=1; break;
case 'N': /* Ask for overlay network to setup one or more interfaces */
if (overlay_interface_args(optarg))
return WHY("Invalid interface specification(s) passed to -N");
overlayMode=1;
break;
case 'G': /* Offer gateway services */
gatewayspec=strdup(optarg);
if(prepareGateway(gatewayspec)) return usage("Invalid gateway specification");
break;
case 'n': /* don't detach from foreground in server mode */
foregroundMode=1; break;
case 'b': /* talk peers on a BATMAN mesh */
batman_socket=strdup(optarg);
break;
case 'l': /* talk peers on a BATMAN mesh */
batman_peerfile=strdup(optarg);
break;
case 'L':
instrumentation_file=strdup(optarg);
break;
case 'B': /* Set simulated Bit Error Rate for bench-testing */
simulatedBER=atof(optarg);
fprintf(stderr,"WARNING: Bit error injection enabled -- this will cause packet loss and is intended only for testing.\n");
break;
case 'i':
instance=atoi(optarg);
if (instance<-1||instance>255) usage("Illegal variable instance ID.");
break;
case 'f':
if (clientMode) usage("Only servers use keyring files");
keyring_file=strdup(optarg);
break;
case 'p': /* additional peers to query */
if (additionalPeer(optarg)) exit(-3);
break;
case 'P': /* Supply pin */
//pin=strdup(optarg);
clientMode=1;
break;
case 'd': /* Ask by DID */
clientMode=1;
did=strdup(optarg);
break;
case 's': /* Ask by subscriber ID */
clientMode=1;
sid=strdup(optarg);
break;
case 't': /* request timeout (ms) */
timeout=atoi(optarg);
break;
case 'v': /* set verbosity */
setVerbosity(optarg);
break;
case 'A': /* get address (IP or otherwise) of a given peer */
peerAddress(did,sid,3 /* 1 = print list of addresses to stdout, 2 = set peer list to responders */);
break;
case 'R': /* read a variable */
{
unsigned char buffer[65535];
int len=0;
requestItem(did,sid,(char *)optarg,instance,buffer,sizeof(buffer),&len,NULL);
}
break;
case 'W': /* write a variable */
{
int var_id;
unsigned char value[65536];
int value_len=65535;
if (parseAssignment((unsigned char *)optarg,&var_id,value,&value_len)) return -1;
value[value_len]=0;
return writeItem(did?did:sid,var_id,instance,value,0,value_len,SET_NOREPLACE,-1,NULL);
}
break;
case 'U': /* write or update a variable */
{
int var_id;
unsigned char value[65536];
int value_len=65535;
if (parseAssignment((unsigned char *)optarg,&var_id,value,&value_len)) return -1;
value[value_len]=0;
return writeItem(did?did:sid,var_id,instance,value,0,value_len,SET_REPLACE,-1,NULL);
}
break;
case 'C': /* create a new keyring entry */
return WHY("Entries in new keyring format must be used with new command line framework.");
break;
case 'O': /* output to templated files */
if (outputtemplate) usage("You can only specify -O once");
outputtemplate=strdup(optarg);
break;
default:
usage("Invalid option");
break;
}
}
if (optind<argc) usage("Extraneous options at end of command");
if (keyring_file&&clientMode) usage("Only servers use backing files");
if (serverMode&&clientMode) usage("You asked me to be both server and client. That's silly.");
if (serverMode) {
if (!foregroundMode)
daemon(0,0);
return server(keyring_file);
}
if (!clientMode) usage("Serval server and client utility.");
#if defined WIN32
WSACleanup();
#endif
/* Client mode: */
return 0;
}
#endif
long long parse_quantity(char *q)
{
int m;
char units[80];
if (strlen(q)>=80) return WHY("quantity string >=80 characters");
if (sscanf(q,"%d%s",&m,units)==2)
{
if (units[1]) return WHY("Units should be single character");
switch(units[0])
{
case 'k': return m*1000LL;
case 'K': return m*1024LL;
case 'm': return m*1000LL*1000LL;
case 'M': return m*1024LL*1024LL;
case 'g': return m*1000LL*1000LL*1000LL;
case 'G': return m*1024LL*1024LL*1024LL;
default:
return WHY("Illegal unit: should be k,K,m,M,g, or G.");
}
}
if (sscanf(q,"%d",&m)==1)
{
return m;
}
else
{
return WHY("Could not parse quantity");
}
}
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