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interface.c
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interface.c
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/* **************************************************************** *
* *
* APRX -- 2nd generation APRS iGate and digi with *
* minimal requirement of esoteric facilities or *
* libraries of any kind beyond UNIX system libc. *
* *
* (c) Matti Aarnio - OH2MQK, 2007-2014 *
* *
* **************************************************************** */
#include "aprx.h"
#include <sys/socket.h>
/*
* The interface subsystem describes all interfaces in one
* coherent way, independent of their actual implementation.
*
*/
/*
<interface>
serial-device /dev/ttyUSB1 19200 8n1 KISS
tx-ok false # receive only (default)
callsign OH2XYZ-R2 # KISS subif 0
initstring "...." # initstring option
timeout 900 # 900 seconds of no Rx
</interface>
<interface>
serial-device /dev/ttyUSB2 19200 8n1 KISS
initstring "...."
timeout 900 # 900 seconds of no Rx
<kiss-subif 0>
callsign OH2XYZ-2
tx-ok true # This is our transmitter
</kiss-subif>
<kiss-subif 1>
callsign OH2XYZ-R3 # This is receiver
tx-ok false # receive only (default)
</kiss-subif>
</interface>
<interface>
tcp-device 172.168.1.1 4001 KISS
tx-ok false # receive only (default)
callsign OH2XYZ-R4 # KISS subif 0
initstring "...." # initstring option
timeout 900 # 900 seconds of no Rx
</interface>
<interface>
ax25-device OH2XYZ-6 # Works only on Linux systems
tx-ok true # This is also transmitter
</interface>
*/
struct aprx_interface **all_interfaces;
int all_interfaces_count;
int top_interfaces_group;
// Init-code stores this with ifindex = 0.
// This is necessary even for system where igate is removed
struct aprx_interface aprsis_interface = {
IFTYPE_APRSIS, 0, 0, 0, "APRSIS",
{'A'<<1,'P'<<1,'R'<<1,'S'<<1,'I'<<1,'S'<<1, 0x60},
0, NULL,
0, 0, 0, // subif, txrefcount, tx_ok
1, 1, 0, // telemeter-to-is, telemeter-to-rf, telemeter-newformat
0, NULL,
NULL,
#ifdef ENABLE_AGWPE
NULL,
#endif
NULL,
0, NULL
};
int interface_is_beaconable(const struct aprx_interface *aif)
{
switch (aif->iftype) {
case IFTYPE_AX25:
case IFTYPE_SERIAL:
case IFTYPE_TCPIP:
case IFTYPE_NULL:
case IFTYPE_APRSIS:
// case IFTYPE_AGWPE:
// These are beaconable.
return 1;
default:
break;
}
return 0;
}
int interface_is_telemetrable(const struct aprx_interface *aif) {
// Check if the interface type is really an RF rx and/or tx
switch (aif->iftype) {
case IFTYPE_AX25:
case IFTYPE_SERIAL:
case IFTYPE_TCPIP:
// case IFTYPE_AGWPE:
// These are real interfaces, and telemetry sources
return 1;
default:
break;
}
return 0;
}
#ifndef DISABLE_IGATE
/*
* A helper for interface_receive_ax25() - analyze 3rd-party packets received
* via radio. If data content inside has path saying "TCPIP" or "TCPXX", consider
* the packet to be indication that fromcall is an IGate.
*/
static void rx_analyze_3rdparty( historydb_t *historydb, struct pbuf_t *pb )
{
const char *e = pb->data + pb->packet_len - 6;
const char *p = pb->info_start;
int from_igate = 0;
history_cell_t *hist_rx;
if (!p) return; // Bad packet..
++p;
for ( ; p < e; ++p ) {
if (*p == ':') break;
if (*p == ',') {
// The "TCPIP*" or "TCPXX*" will always have preceding ","
if (memcmp(",TCPIP*", p, 7) == 0) {
from_igate = 1;
break;
}
if (memcmp(",TCPXX*", p, 7) == 0) {
from_igate = 1;
break;
}
} // Start with 'T'.
}
if (!from_igate) return; // Not recognized as being sent from another TX-IGATE
// OK, this packet originated from an TX-IGATE
// Insert it afresh
hist_rx = historydb_insert_heard(historydb, pb);
if (hist_rx != NULL) {
// Explicitly mark it as "received from APRSIS"
// The packet was received from a TX-IGATE, therefore
// the source of that packet is now logged as "from APRSIS".
hist_rx->last_heard[0] = pb->t;
}
}
#endif
static char *interface_default_aliases[] = { "RELAY","WIDE","TRACE" };
static void interface_store(struct aprx_interface *aif)
{
if (debug)
printf("interface_store() aif->callsign = '%s'\n", aif->callsign);
// Init the interface specific Erlang accounting
erlang_add(aif->callsign, ERLANG_RX, 0, 0);
all_interfaces_count += 1;
all_interfaces = realloc(all_interfaces,
sizeof(*all_interfaces) * all_interfaces_count);
all_interfaces[all_interfaces_count -1] = aif;
if (aif->ifindex < 0)
aif->ifindex = all_interfaces_count -1;
if (aif->ifgroup < 0) {
aif->ifgroup = all_interfaces_count; // starting at 1. the 0 is for APRSIS
/* -- no hard upper limit anymore
if (aif->ifgroup >= MAX_IF_GROUP)
aif->ifgroup = MAX_IF_GROUP -1;
*/
}
if (top_interfaces_group <= aif->ifgroup)
top_interfaces_group = aif->ifgroup +1;
}
struct aprx_interface *find_interface_by_callsign(const char *callsign)
{
int i;
for (i = 0; i < all_interfaces_count; ++i) {
if ((all_interfaces[i]->callsign != NULL) &&
(strcasecmp(callsign, all_interfaces[i]->callsign) == 0)) {
return all_interfaces[i];
}
}
return NULL; // Not found!
}
struct aprx_interface *find_interface_by_index(const int index)
{
if (index >= all_interfaces_count ||
index < 0) {
return NULL; // Invalid index value
} else {
return all_interfaces[index];
}
}
static int config_kiss_subif(struct configfile *cf, struct aprx_interface *aifp, char *param1, char *str, int maxsubif)
{
struct aprx_interface *aif;
int fail = 0;
char *name;
int parlen = 0;
char *initstring = NULL;
int initlength = 0;
char *callsign = NULL;
int subif = 0;
int tx_ok = 0;
int telemeter_to_is = 1;
int telemeter_to_rf = 1;
int aliascount = 0;
char **aliases = NULL;
int ifgroup = -1;
const char *p = param1;
int c;
if (aifp == NULL || aifp->tty == NULL) {
printf("%s:%d ERROR: <kiss-subif> on bad type of <interface> entry.\n",
cf->name, cf->linenum);
return 1;
}
for ( ; *p; ++p ) {
c = *p;
if ('0' <= c && c <= '9') {
subif = subif * 10 + (c - '0');
} else if (c == '>') {
// all fine..
break;
} else {
// FIXME: <KISS-SubIF nnn> parameter value is bad!
printf("%s:%d ERROR: <kiss-subif %s parameter value is bad\n",
cf->name, cf->linenum, param1);
return 1;
}
}
if (subif >= maxsubif) {
// FIXME: <KISS-SubIF nnn> parameter value is bad!
printf("%s:%d ERROR: <kiss-subif %s parameter value is too large for this KISS variant.\n",
cf->name, cf->linenum, param1);
return 1;
}
while (readconfigline(cf) != NULL) {
if (configline_is_comment(cf))
continue; /* Comment line, or empty line */
// It can be severely indented...
str = config_SKIPSPACE(cf->buf);
name = str;
str = config_SKIPTEXT(str, NULL);
str = config_SKIPSPACE(str);
config_STRLOWER(name);
param1 = str;
str = config_SKIPTEXT(str, &parlen);
str = config_SKIPSPACE(str);
if (strcmp(name, "</kiss-subif>") == 0) {
break; // End of this sub-group
}
if (strcmp(name, "callsign") == 0) {
if (strcasecmp(param1,"$mycall") == 0)
callsign = strdup(mycall);
else
callsign = strdup(param1);
if (!validate_callsign_input(callsign,tx_ok)) {
if (tx_ok)
printf("%s:%d ERROR: The CALLSIGN parameter on AX25-DEVICE must be of valid AX.25 format! '%s'\n",
cf->name, cf->linenum, callsign);
else
printf("%s:%d ERROR: The CALLSIGN parameter on AX25-DEVICE must be of valid APRSIS format! '%s'\n",
cf->name, cf->linenum, callsign);
fail = 1;
break;
}
if (find_interface_by_callsign(callsign) != NULL) {
// An interface with THIS callsign does exist already!
printf("%s:%d ERROR: Same callsign (%s) exists already on another interface.\n",
cf->name, cf->linenum, callsign);
fail = 1;
continue;
}
} else if (strcmp(name, "initstring") == 0) {
if (initstring == NULL) {
initlength = parlen;
initstring = malloc(parlen);
memcpy(initstring, param1, parlen);
} else {
printf("%s:%d ERROR: Double-definition of initstring parameter.\n",
cf->name, cf->linenum);
fail = 1;
break;
}
} else if (strcmp(name, "tx-ok") == 0) {
if (!config_parse_boolean(param1, &tx_ok)) {
printf("%s:%d ERROR: Bad TX-OK parameter value -- not a recognized boolean: %s\n",
cf->name, cf->linenum, param1);
fail = 1;
break;
}
} else if (strcmp(name, "telem-to-is") == 0) {
if (!config_parse_boolean(param1, &telemeter_to_is)) {
printf("%s:%d ERROR: Bad TELEM-TO-IS parameter value -- not a recognized boolean: %s\n",
cf->name, cf->linenum, param1);
fail = 1;
break;
}
} else if (strcmp(name, "telem-to-rf") == 0) {
if (!config_parse_boolean(param1, &telemeter_to_rf)) {
printf("%s:%d ERROR: Bad TELEM-TO-RF parameter value -- not a recognized boolean: %s\n",
cf->name, cf->linenum, param1);
fail = 1;
break;
}
} else if (strcmp(name, "alias") == 0) {
char *k = strtok(param1, ",");
for (; k ; k = strtok(NULL,",")) {
++aliascount;
if (debug) printf(" n=%d alias='%s'\n",aliascount,k);
aliases = realloc(aliases, sizeof(char*) * aliascount);
aliases[aliascount-1] = strdup(k);
}
#ifndef DISABLE_IGATE
} else if (strcmp(name, "igate-group") == 0) {
// param1 = integer 1 to N.
ifgroup = atol(param1);
if (ifgroup < 1) {
printf("%s:%d ERROR: interface 'igate-group' parameter value: '%s' is an integer with minimum value of 1.\n",
cf->name, cf->linenum, param1);
fail = 1;
break;
/* -- no hard upper limit anymore
} else if (ifgroup >= MAX_IF_GROUP) {
printf("%s:%d ERROR: interface 'igate-group' parameter value: '%s' is an integer with maximum value of %d.\n",
cf->name, cf->linenum, param1, MAX_IF_GROUP-1);
fail = 1;
break;
*/
}
#endif
} else {
printf("%s:%d ERROR: Unrecognized <interface> block keyword: %s\n",
cf->name, cf->linenum, name);
fail = 1;
break;
}
}
if (fail) {
ERRORMEMFREE:
if (aliases != NULL) free(aliases);
if (initstring != NULL) free(initstring);
return 1; // this leaks memory (but also diagnoses bad input)
}
if (callsign == NULL) {
// FIXME: Must define at least a callsign!
printf("%s:%d ERROR: <kiss-subif ..> MUST define CALLSIGN parameter!\n",
cf->name, cf->linenum);
goto ERRORMEMFREE;
}
if (find_interface_by_callsign(callsign) != NULL) {
// An interface with THIS callsign does exist already!
printf("%s:%d ERROR: Same callsign (%s) exists already on another interface.\n",
cf->name, cf->linenum, callsign);
goto ERRORMEMFREE;
}
if (debug)
printf(" Defining <kiss-subif %d> callsign=%s txok=%s\n", subif, callsign,
tx_ok ? "true":"false");
aif = malloc(sizeof(*aif));
memcpy(aif, aifp, sizeof(*aif));
aif->callsign = callsign;
parse_ax25addr(aif->ax25call, callsign, 0x60);
aif->subif = subif;
aif->tx_ok = tx_ok;
aif->telemeter_to_is = telemeter_to_is;
aif->telemeter_to_rf = telemeter_to_rf;
// aif->telemeter_newformat = ...
aif->ifindex = -1; // system sets automatically at store time
aif->ifgroup = ifgroup; // either user sets, or system sets at store time
aifp->tty->interface [subif] = aif;
aifp->tty->ttycallsign[subif] = callsign;
#ifdef PF_AX25 /* PF_AX25 exists -- highly likely a Linux system ! */
aifp->tty->netax25 [subif] = netax25_open(callsign);
#endif
if (initstring != NULL) {
aifp->tty->initlen[subif] = initlength;
aifp->tty->initstring[subif] = initstring;
}
if (aliascount == 0 || aliases == NULL) {
aif->aliascount = 3;
aif->aliases = interface_default_aliases;
} else {
aif->aliascount = aliascount;
aif->aliases = aliases;
}
return 0;
}
void interface_init()
{
interface_store( &aprsis_interface );
}
int interface_config(struct configfile *cf)
{
struct aprx_interface *aif = calloc(1, sizeof(*aif));
char *name, *param1;
char *str = cf->buf;
int parlen = 0;
int have_fault = 0;
int maxsubif = 16; // 16 for most KISS modes, 8 for SMACK
int defined_subinterface_count = 0;
int ifgroup = -1;
aif->iftype = IFTYPE_UNSET;
aif->aliascount = 3;
aif->aliases = interface_default_aliases;
aif->ifindex = -1; // system sets automatically at store time
aif->ifgroup = ifgroup; // either user sets, or system sets at store time
aif->tx_ok = 0;
aif->telemeter_to_is = 1;
aif->telemeter_to_rf = 1;
aif->telemeter_newformat = 0;
while (readconfigline(cf) != NULL) {
if (configline_is_comment(cf))
continue; /* Comment line, or empty line */
// It can be severely indented...
str = config_SKIPSPACE(cf->buf);
name = str;
str = config_SKIPTEXT(str, NULL);
str = config_SKIPSPACE(str);
config_STRLOWER(name);
param1 = str;
str = config_SKIPTEXT(str, &parlen);
str = config_SKIPSPACE(str);
if (strcmp(name, "</interface>") == 0) {
// End of this interface definition
// make the interface...
break;
}
if (strcmp(name, "<kiss-subif") == 0) {
if (config_kiss_subif(cf, aif, param1, str, maxsubif)) {
// Bad inputs.. complained already
have_fault = 1;
}
// Always count as defined, even when an error happened!
++defined_subinterface_count;
continue;
}
// Interface parameters
if (strcmp(name,"ax25-device") == 0) {
#ifdef PF_AX25 // PF_AX25 exists -- highly likely a Linux system !
if (aif->iftype == IFTYPE_UNSET) {
aif->iftype = IFTYPE_AX25;
// aif->nax25p = NULL;
} else {
printf("%s:%d ERROR: Only single device specification per interface block!\n",
cf->name, cf->linenum);
have_fault = 1;
continue;
}
if (strcasecmp(param1,"$mycall") == 0)
param1 = strdup(mycall);
if (!validate_callsign_input(param1,1)) {
printf("%s:%d ERROR: The CALLSIGN parameter on AX25-DEVICE must be of valid AX.25 format! '%s'\n",
cf->name, cf->linenum, param1);
have_fault = 1;
continue;
}
if (find_interface_by_callsign(param1) != NULL) {
// An interface with THIS callsign does exist already!
printf("%s:%d ERROR: Same callsign (%s) exists already on another interface.\n",
cf->name, cf->linenum, param1);
have_fault = 1;
continue;
}
if (debug)
printf("%s:%d: AX25-DEVICE '%s' '%s'\n",
cf->name, cf->linenum, param1, str);
aif->callsign = strdup(param1);
parse_ax25addr(aif->ax25call, aif->callsign, 0x60);
aif->nax25p = netax25_addrxport(param1, aif);
if (aif->nax25p == NULL) {
printf("%s:%d ERROR: Failed to open this AX25-DEVICE: '%s'\n",
cf->name, cf->linenum, param1);
have_fault = 1;
continue;
}
#else
printf("%s:%d ERROR: AX25-DEVICE interfaces are not supported at this system!\n",
cf->name, cf->linenum);
have_fault = 1;
#endif
} else if ((strcmp(name,"serial-device") == 0) && (aif->tty == NULL)) {
if (aif->iftype == IFTYPE_UNSET) {
aif->iftype = IFTYPE_SERIAL;
aif->tty = ttyreader_new();
aif->tty->ttyname = strdup(param1);
aif->tty->interface[0] = aif;
aif->tty->ttycallsign[0] = mycall;
// end processing registers it
} else {
printf("%s:%d ERROR: Only single device specification per interface block!\n",
cf->name, cf->linenum);
have_fault = 1;
continue;
}
if (debug)
printf(".. new style serial: '%s' '%s'.. tncid=0\n",
aif->tty->ttyname, str);
have_fault |= ttyreader_parse_ttyparams(cf, aif->tty, str);
switch (aif->tty->linetype) {
case LINETYPE_KISSSMACK:
maxsubif = 8; // 16 for most KISS modes, 8 for SMACK
break;
case LINETYPE_KISSFLEXNET:
// ???
break;
default:
break;
}
// Always count as defined, even when an error happened!
++defined_subinterface_count;
} else if ((strcmp(name,"tcp-device") == 0) && (aif->tty == NULL)) {
int len;
char *host, *port;
if (aif->iftype == IFTYPE_UNSET) {
aif->iftype = IFTYPE_TCPIP;
aif->tty = ttyreader_new();
aif->tty->interface[0] = aif;
aif->tty->ttycallsign[0] = mycall;
// end-step processing registers it
} else {
printf("%s:%d ERROR: Only single device specification per interface block!\n",
cf->name, cf->linenum);
have_fault = 1;
continue;
}
host = param1;
port = str;
str = config_SKIPTEXT(str, NULL);
str = config_SKIPSPACE(str);
if (debug)
printf(".. new style tcp!: '%s' '%s' '%s'..\n",
host, port, str);
len = strlen(host) + strlen(port) + 8;
aif->tty->ttyname = malloc(len);
sprintf((char *) (aif->tty->ttyname), "tcp!%s!%s!", host, port);
have_fault |= ttyreader_parse_ttyparams( cf, aif->tty, str );
switch (aif->tty->linetype) {
case LINETYPE_KISSSMACK:
maxsubif = 8; // 16 for most KISS modes, 8 for SMACK
break;
case LINETYPE_KISSFLEXNET:
// ???
break;
default:
break;
}
// Always count as defined, even when an error happened!
++defined_subinterface_count;
} else if (strcmp(name,"null-device") == 0) {
if (aif->iftype == IFTYPE_UNSET) {
aif->iftype = IFTYPE_NULL;
// aif->nax25p = NULL;
} else {
printf("%s:%d ERROR: Only single device specification per interface block!\n",
cf->name, cf->linenum);
have_fault = 1;
continue;
}
aif->tx_ok = 1;
if (strcasecmp(param1,"$mycall") == 0)
param1 = strdup(mycall);
if (find_interface_by_callsign(param1) != NULL) {
// An interface with THIS callsign does exist already!
printf("%s:%d ERROR: Same callsign (%s) exists already on another interface.\n",
cf->name, cf->linenum, param1);
have_fault = 1;
continue;
}
if (!have_fault) {
aif->iftype = IFTYPE_TCPIP;
aif->tty = ttyreader_new();
aif->tty->interface[0] = aif;
aif->tty->ttycallsign[0] = mycall;
}
have_fault |= ttyreader_parse_nullparams(cf, aif->tty, str);
if (debug)
printf("%s:%d: NULL-DEVICE '%s' '%s'\n",
cf->name, cf->linenum, param1, str);
aif->callsign = strdup(param1);
parse_ax25addr(aif->ax25call, aif->callsign, 0x60);
#ifdef ENABLE_AGWPE
} else if ((strcmp(name,"agwpe-device") == 0) && (aif->tty == NULL)) {
// agwpe-device hostname hostport callsign agwpeportnum
int len;
const char *hostname, *hostport;
char *callsign, *agwpeportnum;
if (aif->iftype == IFTYPE_UNSET) {
aif->iftype = IFTYPE_AGWPE;
aif->tty = ttyreader_new();
aif->tty->interface[0] = aif;
aif->tty->ttycallsign[0] = mycall;
// end-step processing registers it
} else {
printf("%s:%d ERROR: Only single device specification per interface block!\n",
cf->name, cf->linenum);
have_fault = 1;
continue;
}
hostname = strdup(param1);
hostport = str;
str = config_SKIPTEXT(str, NULL);
str = config_SKIPSPACE(str);
hostport = strdup(hostport);
callsign = str;
str = config_SKIPTEXT(str, NULL);
str = config_SKIPSPACE(str);
agwpeportnum = str;
str = config_SKIPTEXT(str, NULL);
str = config_SKIPSPACE(str);
if (debug)
printf(".. AGWPE-DEVICE: '%s' '%s' '%s' '%s' ('%s'...)\n",
hostname, hostport, callsign, agwpeportnum, str);
len = strlen(hostname) + strlen(hostport) + strlen(agwpeportnum) + 8;
aif->tty->ttyname = malloc(len);
sprintf((char *) (aif->tty->ttyname), "tcp!%s!%s[%s]",
hostname, hostport, agwpeportnum);
if (strcasecmp(callsign,"$mycall") == 0)
callsign = strdup(mycall);
else
callsign = strdup(callsign);
if (!validate_callsign_input(callsign,1)) {
printf("%s:%d ERROR: The CALLSIGN parameter on AGWPE-DEVICE must be of valid AX.25 format! '%s'\n",
cf->name, cf->linenum, callsign);
have_fault = 1;
continue;
}
if (find_interface_by_callsign(callsign) != NULL) {
// An interface with THIS callsign does exist already!
printf("%s:%d ERROR: Same callsign (%s) exists already on another interface.\n",
cf->name, cf->linenum, callsign);
have_fault = 1;
continue;
}
aif->callsign = callsign;
parse_ax25addr(aif->ax25call, aif->callsign, 0x60);
aif->agwpe = agwpe_addport(hostname, hostport, agwpeportnum, aif);
if (aif->agwpe == NULL) {
printf("%s:%d ERROR: Failed to setup this AGWPE-DEVICE: '%s'\n",
cf->name, cf->linenum, callsign);
have_fault = 1;
continue;
}
// Always count as defined, even when an error happened!
++defined_subinterface_count;
#endif
} else if (strcmp(name,"tx-ok") == 0) {
int bool;
if (!config_parse_boolean(param1, &bool)) {
printf("%s:%d ERROR: Bad TX-OK parameter value -- not a recognized boolean: %s\n",
cf->name, cf->linenum, param1);
have_fault = 1;
continue;
}
aif->tx_ok = bool;
if (bool && aif->callsign) {
if (!validate_callsign_input(aif->callsign,bool)) { // Transmitters REQUIRE valid AX.25 address
printf("%s:%d: ERROR: TX-OK 'TRUE' -- BUT PREVIOUSLY SET CALLSIGN IS NOT VALID AX.25 ADDRESS \n",
cf->name, cf->linenum);
continue;
}
}
} else if (strcmp(name, "telem-to-is") == 0) {
int bool;
if (!config_parse_boolean(param1, &bool)) {
printf("%s:%d ERROR: Bad TELEM-TO-IS parameter value -- not a recognized boolean: %s\n",
cf->name, cf->linenum, param1);
have_fault = 1;
break;
}
aif->telemeter_to_is = bool;
} else if (strcmp(name, "telem-to-rf") == 0) {
int bool;
if (!config_parse_boolean(param1, &bool)) {
printf("%s:%d ERROR: Bad TELEM-TO-RF parameter value -- not a recognized boolean: %s\n",
cf->name, cf->linenum, param1);
have_fault = 1;
break;
}
aif->telemeter_to_rf = bool;
} else if (strcmp(name,"timeout") == 0) {
if (config_parse_interval(param1, &(aif->timeout) ) ||
(aif->timeout < 0) || (aif->timeout > 14400)) {
aif->timeout = 0;
printf("%s:%d ERROR: Bad TIMEOUT parameter value: '%s' accepted range: 0s to 4h.\n",
cf->name, cf->linenum, param1);
have_fault = 1;
continue;
}
if (aif->tty != NULL) {
aif->tty->read_timeout = aif->timeout;
}
} else if (strcmp(name, "callsign") == 0) {
if (strcasecmp(param1,"$mycall") == 0)
param1 = strdup(mycall);
if (find_interface_by_callsign(param1) != NULL) {
// An interface with THIS callsign does exist already!
printf("%s:%d ERROR: Same callsign (%s) exists already on another interface.\n",
cf->name, cf->linenum, param1);
have_fault = 1;
continue;
}
if (!validate_callsign_input(param1, aif->tx_ok)) {
if (aif->tx_ok && aif->iftype != IFTYPE_NULL) {
printf("%s:%d ERROR: The CALLSIGN parameter on transmit capable interface must be of valid AX.25 format! '%s'\n",
cf->name, cf->linenum, param1);
have_fault = 1;
continue;
}
}
if (aif->callsign != NULL)
free(aif->callsign);
aif->callsign = strdup(param1);
parse_ax25addr(aif->ax25call, aif->callsign, 0x60);
if (aif->tty != NULL)
aif->tty->ttycallsign[0] = aif->callsign;
if (debug)
printf(" callsign= '%s'\n", aif->callsign);
} else if (strcmp(name, "initstring") == 0) {
if (aif->tty != NULL) {
int initlength = parlen;
char *initstring = malloc(parlen);
memcpy(initstring, param1, parlen);
aif->tty->initstring[0] = initstring;
aif->tty->initlen[0] = initlength;
}
} else if (strcmp(name, "alias") == 0) {
char *k = strtok(param1, ",");
if (aif->aliases == interface_default_aliases) {
aif->aliascount = 0;
aif->aliases = NULL;
}
for (; k ; k = strtok(NULL,",")) {
aif->aliascount += 1;
if (debug) printf(" n=%d alias='%s'\n",aif->aliascount,k);
aif->aliases = realloc(aif->aliases, sizeof(char*) * aif->aliascount);
aif->aliases[aif->aliascount-1] = strdup(k);
}
#ifndef DISABLE_IGATE
} else if (strcmp(name, "igate-group") == 0) {
// param1 = integer 1 to N.
ifgroup = atol(param1);
if (ifgroup < 1) {
printf("%s:%d ERROR: interface 'igate-group' parameter value: '%s' is an integer with minimum value of 1.\n",
cf->name, cf->linenum, param1);
have_fault = 1;
continue;
/* -- no hard upper limit anymore
} else if (ifgroup >= MAX_IF_GROUP) {
printf("%s:%d ERROR: interface 'igate-group' parameter value: '%s' is an integer with maximum value of %d.\n",
cf->name, cf->linenum, param1, MAX_IF_GROUP-1);
have_fault = 1;
continue;
*/
}
#endif
} else {
printf("%s:%d ERROR: Unknown <interface> config entry name: '%s'\n",
cf->name, cf->linenum, name);
have_fault = 1;
}
}
while (!have_fault &&
aif->callsign == NULL &&
(aif->iftype == IFTYPE_SERIAL || aif->iftype == IFTYPE_TCPIP) &&
defined_subinterface_count == 1) {
// First check if there already is an interface with $mycall
// callsign on it..
if (find_interface_by_callsign(mycall) != NULL) {
// An interface with $MYCALL callsign does exist already!
printf("%s:%d ERROR: The $MYCALL callsign (%s) exists already on another interface.\n",
cf->name, cf->linenum, mycall);
have_fault = 1;
break;
}
// Supply a default value
aif->callsign = strdup(mycall);
parse_ax25addr(aif->ax25call, aif->callsign, 0x60);
#ifdef PF_AX25 // PF_AX25 exists -- highly likely a Linux system !
// With enough defaults being used, the callsign is defined
// by global "macro" mycall, and never ends up activating
// the tty -> linux kernel kiss/smack pty interface.
// This part does that final step for minimalistic config.
if (aif->tty != NULL &&
aif->tty->netax25[0] == NULL &&
aif->tty->ttycallsign[0] != NULL) {
aif->tty->netax25[0]
= netax25_open(aif->tty->ttycallsign[0]);
}
#endif
// Done it, leave..
break;
}
if (!have_fault) {
int i;
if (aif->tty != NULL) {
// Register all tty subinterfaces
if (debug) printf(" .. store tty subinterfaces\n");
for (i = 0; i < maxsubif; ++i) {
if (aif->tty->interface[i] != NULL) {
if (debug) printf(" .. store interface[%d] callsign='%s'\n",i, aif->tty->interface[i]->callsign);
interface_store(aif->tty->interface[i]);
}
}
} else {
// Not TTY multiplexed ( = KISS ) interface,
// register just the primary.
aif->ifgroup = ifgroup; // either user sets, or system sets at store time
interface_store(aif);
if (debug) printf(" .. store other interface\n");
}
if (aif->iftype == IFTYPE_SERIAL)
ttyreader_register(aif->tty);
if (aif->iftype == IFTYPE_TCPIP)
ttyreader_register(aif->tty);
} else {
if (aif->callsign) free(aif->callsign);
if (aif->tty) {
if (aif->tty->ttyname) free((void*)(aif->tty->ttyname));
}
free(aif);
}
// coverity[leaked_storage]
return have_fault;
}
/*
* Process received AX.25 packet
* - from AIF do find all DIGIPEATERS wanting this source.
* - If there are none, end processing.
* - Parse the received frame for possible latter filters
* - Feed the resulting parsed packet to each digipeater
*
*
* Tx-IGate rules:
*
// 2) - sending station has not been heard recently
// on radio
// 1) - verify receiving station has been heard
// recently on radio
// 4) - the receiving station has not been heard via
// the Internet within a predefined time period.
// (Note that _this_ packet is heard from internet,
// so one must not confuse this to history..
// Nor this siblings that are being created
// one for each tx-interface...)
//
// A station is said to be heard via the Internet if packets
// from the station contain TCPIP* or TCPXX* in the header or
// if gated (3rd-party) packets are seen on RF gated by the
// station and containing TCPIP or TCPXX in the 3rd-party
// header (in other words, the station is seen on RF as being
// an IGate).
*
* That is, this part of code collects knowledge of RF-wise near-by TX-IGATEs.
*/
void interface_receive_ax25(const struct aprx_interface *aif,
const char *ifaddress, const int is_aprs, const int ui_pid,