/* main() for udpxrec module
*/
int udpxrec_main( int argc, char* const argv[] )
{
int rc = 0, ch = 0, custom_log = 0, no_daemon = 0;
static const char OPTMASK[] = "vb:e:M:p:B:n:m:l:c:R:u:T";
time_t now = time(NULL);
char now_buf[ 32 ] = {0}, sel_buf[ 32 ] = {0}, app_finfo[80] = {0};
extern int optind, optopt;
extern const char IPv4_ALL[];
mk_app_info(g_udpxrec_app, g_app_info, sizeof(g_app_info) - 1);
if( argc < 2 ) {
usage( argv[0], stderr );
return ERR_PARAM;
}
rc = init_recopt( &g_recopt );
while( (0 == rc) && (-1 != (ch = getopt( argc, argv, OPTMASK ))) ) {
switch(ch) {
case 'T': no_daemon = 1; break;
case 'v': set_verbose( &g_recopt.is_verbose ); break;
case 'b':
if( (time_t)0 != g_recopt.end_time ) {
(void) fprintf( stderr, "Cannot specify start-recording "
"time after end-recording time has been set\n" );
}
rc = a2time( optarg, &g_recopt.bg_time, time(NULL) );
if( 0 != rc ) {
(void) fprintf( stderr, "Invalid time: [%s]\n", optarg );
rc = ERR_PARAM;
}
else {
if( g_recopt.bg_time < now ) {
(void)strncpy( now_buf, Zasctime(localtime( &now )),
sizeof(now_buf) );
(void)strncpy( sel_buf,
Zasctime(localtime( &g_recopt.bg_time )),
sizeof(sel_buf) );
(void) fprintf( stderr,
"Selected %s time is in the past, "
"now=[%s], selected=[%s]\n", "start",
now_buf, sel_buf );
rc = ERR_PARAM;
}
}
break;
case 'e':
if( (time_t)0 == g_recopt.bg_time ) {
g_recopt.bg_time = time(NULL);
(void)fprintf( stderr,
"Start-recording time defaults to now [%s]\n",
Zasctime( localtime( &g_recopt.bg_time ) ) );
}
rc = a2time( optarg, &g_recopt.end_time, g_recopt.bg_time );
if( 0 != rc ) {
(void) fprintf( stderr, "Invalid time: [%s]\n", optarg );
rc = ERR_PARAM;
}
else {
if( g_recopt.end_time < now ) {
(void)strncpy( now_buf, Zasctime(localtime( &now )),
sizeof(now_buf) );
(void)strncpy( sel_buf,
Zasctime(localtime( &g_recopt.end_time )),
sizeof(sel_buf) );
(void) fprintf( stderr,
"Selected %s time is in the past, "
"now=[%s], selected=[%s]\n", "end",
now_buf, sel_buf );
rc = ERR_PARAM;
}
}
break;
case 'M':
rc = a2int64( optarg, &g_recopt.max_fsize );
if( 0 != rc ) {
(void) fprintf( stderr, "Invalid file size: [%s]\n",
optarg );
rc = ERR_PARAM;
}
break;
case 'p':
g_recopt.pidfile = strdup(optarg);
break;
case 'B':
rc = a2size( optarg, &g_recopt.bufsize );
if( 0 != rc ) {
(void) fprintf( stderr, "Invalid buffer size: [%s]\n",
optarg );
rc = ERR_PARAM;
}
else if( (g_recopt.bufsize < MIN_MCACHE_LEN) ||
(g_recopt.bufsize > MAX_MCACHE_LEN)) {
(void) fprintf( stderr,
"Buffer size must be in [%ld-%ld] bytes range\n",
(long)MIN_MCACHE_LEN, (long)MAX_MCACHE_LEN );
rc = ERR_PARAM;
}
break;
case 'n':
g_recopt.nice_incr = atoi( optarg );
if( 0 == g_recopt.nice_incr ) {
(void) fprintf( stderr,
"Invalid nice-value increment: [%s]\n", optarg );
rc = ERR_PARAM;
}
break;
case 'm':
rc = get_ipv4_address( optarg, g_recopt.mcast_addr,
sizeof(g_recopt.mcast_addr) );
if( 0 != rc ) {
(void) fprintf( stderr, "Invalid multicast address: [%s]\n",
optarg );
rc = ERR_PARAM;
}
break;
case 'l':
g_flog = fopen( optarg, "a" );
if( NULL == g_flog ) {
rc = errno;
(void) fprintf( stderr, "Error opening logfile [%s]: %s\n",
optarg, strerror(rc) );
rc = ERR_PARAM; break;
}
Setlinebuf( g_flog );
custom_log = 1;
break;
case 'c':
rc = get_addrport( optarg, g_recopt.rec_channel,
sizeof( g_recopt.rec_channel ),
&g_recopt.rec_port );
if( 0 != rc ) rc = ERR_PARAM;
break;
case 'R':
g_recopt.rbuf_msgs = atoi( optarg );
if( (g_recopt.rbuf_msgs <= 0) && (-1 != g_recopt.rbuf_msgs) ) {
(void) fprintf( stderr,
"Invalid rcache size: [%s]\n", optarg );
rc = ERR_PARAM;
}
break;
case 'u':
g_recopt.waitupd_sec = atoi(optarg);
if( g_recopt.waitupd_sec <= 0 ) {
(void) fprintf( stderr, "Invalid wait-update value [%s] "
"(must be a number > 0)\n", optarg );
rc = ERR_PARAM;
}
break;
case ':':
(void) fprintf( stderr, "Option [-%c] requires an argument\n",
optopt );
rc = ERR_PARAM; break;
case '?':
(void) fprintf( stderr, "Unrecognized option: [-%c]\n", optopt );
rc = ERR_PARAM; break;
default:
usage( argv[0], stderr );
rc = ERR_PARAM; break;
} /* switch */
} /* while getopt */
if( 0 == rc ) {
if( optind >= argc ) {
(void) fputs( "Missing destination file parameter\n", stderr );
rc = ERR_PARAM;
}
else {
g_recopt.dstfile = strdup( argv[optind] );
}
if( !(g_recopt.max_fsize > 0 || g_recopt.end_time) ) {
(void) fputs( "Must specify either max file [-M] size "
"or end time [-e]\n", stderr );
rc = ERR_PARAM;
}
if( !g_recopt.rec_channel[0] || !g_recopt.rec_port ) {
(void) fputs( "Must specify multicast channel to record from\n",
stderr );
rc = ERR_PARAM;
}
}
if( rc ) {
free_recopt( &g_recopt );
return rc;
}
do {
if( '\0' == g_recopt.mcast_addr[0] ) {
(void) strncpy( g_recopt.mcast_addr, IPv4_ALL,
sizeof(g_recopt.mcast_addr) - 1 );
}
if( !custom_log ) {
/* in debug mode output goes to stderr, otherwise to /dev/null */
g_flog = ((uf_TRUE == g_recopt.is_verbose)
? stderr
: fopen( "/dev/null", "a" ));
if( NULL == g_flog ) {
perror("fopen");
rc = ERR_INTERNAL; break;
}
}
if( 0 == geteuid() ) {
if( !no_daemon ) {
if( stderr == g_flog ) {
(void) fprintf( stderr,
"Logfile must be specified to run "
"in verbose mode in background\n" );
rc = ERR_PARAM; break;
}
if( NULL == g_recopt.pidfile ) {
(void) fprintf( stderr, "pidfile must be specified "
"to run as daemon\n" );
rc = ERR_PARAM; break;
}
if( 0 != (rc = daemonize(0, g_flog)) ) {
rc = ERR_INTERNAL; break;
}
}
} /* 0 == geteuid() */
if( NULL != g_recopt.pidfile ) {
rc = make_pidfile( g_recopt.pidfile, getpid(), g_flog );
if( 0 != rc ) break;
}
(void) set_nice( g_recopt.nice_incr, g_flog );
if( 0 != (rc = setup_signals()) ) break;
TRACE( fprint_recopt( g_flog, &g_recopt ) );
TRACE( printcmdln( g_flog, g_app_info, argc, argv ) );
if( g_recopt.bg_time ) {
if( 0 != (rc = verify_channel()) || g_quit )
break;
rc = wait_till( g_recopt.bg_time, g_recopt.waitupd_sec );
if( rc || g_quit ) break;
}
rc = record();
if( NULL != g_recopt.pidfile ) {
if( -1 == unlink(g_recopt.pidfile) ) {
mperror( g_flog, errno, "unlink [%s]", g_recopt.pidfile );
}
}
}
while(0);
if( g_flog ) {
(void)tmfprintf( g_flog, "%s is exiting with rc=[%d]\n",
app_finfo, rc );
}
if( g_flog && (stderr != g_flog) ) {
(void) fclose(g_flog);
}
free_recopt( &g_recopt );
return rc;
}
/* generate service's (HTML) status page
*/
int
mk_status_page( const struct server_ctx* ctx,
char* buf, size_t* len,
int options )
{
int n = -1;
prbuf_t pb = NULL;
time_t tm_now = time(NULL);
const char* str_now = Zasctime(localtime(&tm_now));
size_t num_clients = 0, i = 0;
char* client_text = NULL;
const char* page_format = NULL;
const unsigned delay_msec = 3000;
size_t text_size = 0, HEADER_SIZE = 0;
static size_t MIN_PER_CLI = 80 + (3 * (IPADDR_STR_SIZE + 5) );
extern const char UDPXY_COPYRIGHT_NOTICE[];
extern const char COMPILE_MODE[];
extern const char VERSION[];
extern const int BUILDNUM;
assert( ctx && buf && len );
do {
n = prbuf_open( &pb, buf, *len );
if( -1 == n ) break;
if( options & MSO_HTTP_HEADER ) {
n = prbuf_printf( pb, "%s", HTML_PAGE_HEADER );
if( n <= 0 ) break;
}
if( options & MSO_RESTART ) {
n = prbuf_printf( pb, REDIRECT_SCRIPT_FMT, delay_msec );
if( n <= 0 ) break;
}
for( i = 0, n = -1; n && (i < LEN_STAT_PAGE_BASE); ++i ) {
n = prbuf_printf( pb, "%s", STAT_PAGE_BASE[i] );
}
if( n <= 0 ) break;
for(text_size = 0, num_clients = 0, i = 0; i < ctx->clmax; ++i ) {
if( ctx->cl[i].pid > 0 ) {
++num_clients;
text_size += MIN_PER_CLI + strlen(ctx->cl[i].tail);
}
}
if( ! (options & MSO_SKIP_CLIENTS) ) {
if( num_clients > (size_t)0 ) {
HEADER_SIZE = strlen(ACLIENT_TABLE[0]);
HEADER_SIZE += strlen(ACLIENT_TABLE[1]);
text_size += HEADER_SIZE;
if (text_size > *len) {
(void) tmfprintf(g_flog, "Client portion of memory [%ld bytes] > "
"[%ld bytes] of the page buffer.\n",
(long)text_size, (long)*len);
n = -1; break;
}
client_text = malloc( text_size );
if( NULL == client_text ) {
mperror( g_flog, errno, "%s: calloc", __func__ );
n = -1;
break;
}
n = mk_client_entries( ctx, client_text, &text_size );
if( -1 == n ) break;
}
} /* MSO_SKIP_CLIENTS */
page_format = ( options & MSO_RESTART ) ? RST_PAGE_FMT1 : STAT_PAGE_FMT1;
n = prbuf_printf( pb, page_format,
getpid(), ctx->listen_addr, ctx->listen_port,
ctx->mcast_ifc_addr,
num_clients,
(client_text ? client_text : ""),
REQUEST_GUIDE,
VERSION, BUILDNUM, COMPILE_MODE, str_now,
UDPXY_COPYRIGHT_NOTICE );
if( -1 == n ) break;
} while(0);
if( -1 == n ) {
(void)tmfprintf( g_flog,
"Error preparing status HTML: "
"insufficient memory size=[%lu]\n", (u_long)(*len));
}
else {
*len = prbuf_len( pb );
}
free( client_text );
(void) prbuf_close( pb );
return (n > 0 ? 0 : -1);
}