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Split beast output into two separate writers for verbatim vs. non-verbatim 

in preparation for supporting both types of connection in parallel
This commit is contained in:
Oliver Jowett 2019-11-27 21:01:46 +08:00
parent dfc588335a
commit 54409b4836
4 changed files with 51 additions and 28 deletions
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3
dump1090.c
View File

@ -303,7 +303,8 @@ void showHelp(void) {
"--net-ro-interval <rate> TCP output memory flush rate in seconds (default: 0)\n"
"--net-heartbeat <rate> TCP heartbeat rate in seconds (default: 60 sec; 0 to disable)\n"
"--net-buffer <n> TCP buffer size 64Kb * (2^n) (default: n=0, 64Kb)\n"
"--net-verbatim Do not apply CRC corrections to messages we forward; send unchanged\n"
"--net-verbatim Make Beast-format output connections default to verbatim mode\n"
" (forward all messages, without applying CRC corrections)\n"
"--forward-mlat Allow forwarding of received mlat results to output ports\n"
"--lat <latitude> Reference/receiver latitude for surface posn (opt)\n"
"--lon <longitude> Reference/receiver longitude for surface posn (opt)\n"

10
dump1090.h
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@ -324,8 +324,12 @@ struct { // Internal state
struct net_service *services; // Active services
struct client *clients; // Our clients
struct net_writer raw_out; // Raw output
struct net_writer beast_out; // Beast-format output
struct net_service *beast_verbatim_service; // Beast-format output service, verbatim mode
struct net_service *beast_cooked_service; // Beast-format output service, "cooked" mode
struct net_writer raw_out; // AVR-format output
struct net_writer beast_verbatim_out; // Beast-format output, verbatim mode
struct net_writer beast_cooked_out; // Beast-format output, "cooked" mode
struct net_writer sbs_out; // SBS-format output
struct net_writer fatsv_out; // FATSV-format output
@ -353,7 +357,7 @@ struct { // Internal state
char *net_output_beast_ports; // List of Beast output TCP ports
char *net_bind_address; // Bind address
int net_sndbuf_size; // TCP output buffer size (64Kb * 2^n)
int net_verbatim; // if true, send the original message, not the CRC-corrected one
int net_verbatim; // if true, Beast output connections default to verbatim mode
int forward_mlat; // allow forwarding of mlat messages to output ports
int quiet; // Suppress stdout
uint32_t show_only; // Only show messages from this ICAO

6
mode_s.c
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@ -389,12 +389,10 @@ static void decodeExtendedSquitter(struct modesMessage *mm);
int decodeModesMessage(struct modesMessage *mm, unsigned char *msg)
{
// Work on our local copy.
memcpy(mm->msg, msg, MODES_LONG_MSG_BYTES);
if (Modes.net_verbatim) {
// Preserve the original uncorrected copy for later forwarding
memcpy(mm->verbatim, msg, MODES_LONG_MSG_BYTES);
}
// Work on our local copy.
memcpy(mm->msg, msg, MODES_LONG_MSG_BYTES);
msg = mm->msg;
// don't accept all-zeros messages

56
net_io.c
View File

@ -76,6 +76,8 @@ static void send_raw_heartbeat(struct net_service *service);
static void send_beast_heartbeat(struct net_service *service);
static void send_sbs_heartbeat(struct net_service *service);
static void writeBeastMessage(struct net_writer *writer, uint64_t timestamp, double signalLevel, unsigned char *msg, int msgLen);
static void writeFATSVEvent(struct modesMessage *mm, struct aircraft *a);
static void writeFATSVPositionUpdate(float lat, float lon, float alt);
@ -254,8 +256,14 @@ void modesInitNet(void) {
s = serviceInit("Raw TCP output", &Modes.raw_out, send_raw_heartbeat, READ_MODE_IGNORE, NULL, NULL);
serviceListen(s, Modes.net_bind_address, Modes.net_output_raw_ports);
s = serviceInit("Beast TCP output", &Modes.beast_out, send_beast_heartbeat, READ_MODE_BEAST_COMMAND, NULL, handleBeastCommand);
serviceListen(s, Modes.net_bind_address, Modes.net_output_beast_ports);
// we maintain two output services, one producing a stream of verbatim messages, one producing a stream of cooked messages
Modes.beast_cooked_service = serviceInit("Beast TCP output (cooked mode)", &Modes.beast_cooked_out, send_beast_heartbeat, READ_MODE_BEAST_COMMAND, NULL, handleBeastCommand);
Modes.beast_verbatim_service = serviceInit("Beast TCP output (verbatim mode)", &Modes.beast_verbatim_out, send_beast_heartbeat, READ_MODE_BEAST_COMMAND, NULL, handleBeastCommand);
if (Modes.net_verbatim)
serviceListen(Modes.beast_verbatim_service, Modes.net_bind_address, Modes.net_output_beast_ports);
else
serviceListen(Modes.beast_cooked_service, Modes.net_bind_address, Modes.net_output_beast_ports);
s = serviceInit("Basestation TCP output", &Modes.sbs_out, send_sbs_heartbeat, READ_MODE_IGNORE, NULL, NULL);
serviceListen(s, Modes.net_bind_address, Modes.net_output_sbs_ports);
@ -376,27 +384,38 @@ static void completeWrite(struct net_writer *writer, void *endptr) {
//
// Write raw output in Beast Binary format with Timestamp to TCP clients
//
static void modesSendBeastOutput(struct modesMessage *mm, struct aircraft *a) {
static void modesSendBeastVerbatimOutput(struct modesMessage *mm, struct aircraft __attribute__((unused)) *a) {
// Don't forward mlat messages, unless --forward-mlat is set
if (mm->source == SOURCE_MLAT && !Modes.forward_mlat)
return;
// Do verbatim output for all messages
writeBeastMessage(&Modes.beast_verbatim_out, mm->timestampMsg, mm->signalLevel, mm->msg, mm->msgbits / 8);
}
static void modesSendBeastCookedOutput(struct modesMessage *mm, struct aircraft *a) {
// Don't forward mlat messages, unless --forward-mlat is set
if (mm->source == SOURCE_MLAT && !Modes.forward_mlat)
return;
// Filter some messages from cooked output
// Don't forward 2-bit-corrected messages
if (!Modes.net_verbatim && mm->correctedbits >= 2)
if (mm->correctedbits >= 2)
return;
// Don't forward unreliable messages
if (!Modes.net_verbatim && (a && !a->reliable) && !mm->reliable)
if ((a && !a->reliable) && !mm->reliable)
return;
int msgLen = mm->msgbits / 8;
char *p = prepareWrite(&Modes.beast_out, 2 + 2 * (7 + msgLen));
writeBeastMessage(&Modes.beast_cooked_out, mm->timestampMsg, mm->signalLevel, mm->verbatim, mm->msgbits / 8);
}
static void writeBeastMessage(struct net_writer *writer, uint64_t timestamp, double signalLevel, unsigned char *msg, int msgLen) {
char ch;
int j;
int sig;
unsigned char *msg = (Modes.net_verbatim ? mm->verbatim : mm->msg);
char *p = prepareWrite(writer, 2 + 2 * (7 + msgLen));
if (!p)
return;
@ -411,21 +430,21 @@ static void modesSendBeastOutput(struct modesMessage *mm, struct aircraft *a) {
{return;}
/* timestamp, big-endian */
*p++ = (ch = (mm->timestampMsg >> 40));
*p++ = (ch = (timestamp >> 40));
if (0x1A == ch) {*p++ = ch; }
*p++ = (ch = (mm->timestampMsg >> 32));
*p++ = (ch = (timestamp >> 32));
if (0x1A == ch) {*p++ = ch; }
*p++ = (ch = (mm->timestampMsg >> 24));
*p++ = (ch = (timestamp >> 24));
if (0x1A == ch) {*p++ = ch; }
*p++ = (ch = (mm->timestampMsg >> 16));
*p++ = (ch = (timestamp >> 16));
if (0x1A == ch) {*p++ = ch; }
*p++ = (ch = (mm->timestampMsg >> 8));
*p++ = (ch = (timestamp >> 8));
if (0x1A == ch) {*p++ = ch; }
*p++ = (ch = (mm->timestampMsg));
*p++ = (ch = (timestamp));
if (0x1A == ch) {*p++ = ch; }
sig = round(sqrt(mm->signalLevel) * 255);
if (mm->signalLevel > 0 && sig < 1)
sig = round(sqrt(signalLevel) * 255);
if (signalLevel > 0 && sig < 1)
sig = 1;
if (sig > 255)
sig = 255;
@ -437,7 +456,7 @@ static void modesSendBeastOutput(struct modesMessage *mm, struct aircraft *a) {
if (0x1A == ch) {*p++ = ch; }
}
completeWrite(&Modes.beast_out, p);
completeWrite(writer, p);
}
static void send_beast_heartbeat(struct net_service *service)
@ -765,7 +784,8 @@ void modesQueueOutput(struct modesMessage *mm, struct aircraft *a) {
// Delegate to the format-specific outputs, each of which makes its own decision about filtering messages
modesSendSBSOutput(mm, a);
modesSendRawOutput(mm, a);
modesSendBeastOutput(mm, a);
modesSendBeastVerbatimOutput(mm, a);
modesSendBeastCookedOutput(mm, a);
writeFATSVEvent(mm, a);
}