feat(tollgate_core): add extern C guards, fix stratum_proxy function name, conditional NAPTfeature/miner-integration

- Add extern "C" guards to tollgate_core.h and tollgate_platform.h for
  C++ compatibility (needed for NerdQAxePlus integration)
- Fix tollgate_core_stratum_proxy_start -> _init to match implementation
- Make ip_napt_enable conditional on CONFIG_LWIP_IPV4_NAPT for
  compatibility with projects that don't enable NAPT

3 files changed, 21 insertions, 1 deletions

diff --git a/components/tollgate_core/include/tollgate_core.h b/components/tollgate_core/include/tollgate_core.h
index aa5d4a1..6a17cbd 100644
--- a/components/tollgate_core/include/tollgate_core.h
+++ b/components/tollgate_core/include/tollgate_core.h
@@ -7,6 +7,10 @@
 #include <stdbool.h>
 #include <stdint.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 esp_err_t tollgate_core_init(const tollgate_platform_t *platform, esp_ip4_addr_t ap_ip);
 
 esp_err_t tollgate_core_dns_start(esp_ip4_addr_t upstream_dns);
@@ -31,10 +35,14 @@ int tollgate_core_allowed_client_count(void);
 bool tollgate_core_is_owner(uint32_t client_ip);
 bool tollgate_core_is_owner_connected(void);
 
-esp_err_t tollgate_core_stratum_proxy_start(uint16_t port);
+esp_err_t tollgate_core_stratum_proxy_init(uint16_t port);
 void tollgate_core_stratum_proxy_stop(void);
 void tollgate_core_on_share_accepted(uint32_t client_ip, double difficulty);
 double tollgate_core_calc_hashprice(double hashrate_ghs);
 char *tollgate_core_get_mining_status_json(void);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif
diff --git a/components/tollgate_core/include/tollgate_platform.h b/components/tollgate_core/include/tollgate_platform.h
index 6c144fa..79e25cf 100644
--- a/components/tollgate_core/include/tollgate_platform.h
+++ b/components/tollgate_core/include/tollgate_platform.h
@@ -4,6 +4,10 @@
 #include <stdint.h>
 #include <stdbool.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 typedef struct {
     uint16_t     (*get_price_sats)(void);
     int32_t      (*get_step_ms)(void);
@@ -26,4 +30,8 @@ typedef struct {
     double       (*get_hashrate)(void);
 } tollgate_platform_t;
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif
diff --git a/components/tollgate_core/src/tollgate_core_firewall.c b/components/tollgate_core/src/tollgate_core_firewall.c
index e5d61d8..ad0697e 100644
--- a/components/tollgate_core/src/tollgate_core_firewall.c
+++ b/components/tollgate_core/src/tollgate_core_firewall.c
@@ -3,7 +3,9 @@
 #include "esp_log.h"
 #include "esp_wifi.h"
 #include "esp_wifi_ap_get_sta_list.h"
+#ifdef CONFIG_LWIP_IPV4_NAPT
 #include "lwip/lwip_napt.h"
+#endif
 #include "lwip/etharp.h"
 #include "lwip/netif.h"
 #include "lwip/prot/ip4.h"
@@ -61,7 +63,9 @@ esp_err_t tollgate_core_fw_init(esp_ip4_addr_t ap_ip)
     s_ap_ip = ap_ip;
     memset(s_clients, 0, sizeof(s_clients));
     s_client_count = 0;
+#ifdef CONFIG_LWIP_IPV4_NAPT
     ip_napt_enable(s_ap_ip.addr, 1);
+#endif
     ESP_LOGI(TAG, "Firewall initialized with AP IP=" IPSTR " (NAT always on, per-client filter)", IP2STR(&s_ap_ip));
     return ESP_OK;
 }