From 653328ba0757f0ce05e8e29e87c0a36cda438d19 Mon Sep 17 00:00:00 2001
From: David Cermak <cermak@espressif.com>
Date: Mon, 18 Aug 2025 08:19:43 +0200
Subject: [PATCH 1/2] fix(eppp): Support for IPv4-only mode

Closes https://github.com/espressif/esp-protocols/issues/864
---
 components/eppp_link/eppp_netif_tun.c                | 12 ++++++++++--
 .../eppp_link/examples/slave/sdkconfig.ci.ipv4_only  |  1 +
 2 files changed, 11 insertions(+), 2 deletions(-)
 create mode 100644 components/eppp_link/examples/slave/sdkconfig.ci.ipv4_only

diff --git a/components/eppp_link/eppp_netif_tun.c b/components/eppp_link/eppp_netif_tun.c
index 32d656bc0..63c0896d9 100644
--- a/components/eppp_link/eppp_netif_tun.c
+++ b/components/eppp_link/eppp_netif_tun.c
@@ -65,12 +65,13 @@ static err_t tun_output_v4(struct netif *netif, struct pbuf *p, const ip4_addr_t
     LWIP_UNUSED_ARG(ipaddr);
     return tun_output(netif, p);
 }
+#if LWIP_IPV6
 static err_t tun_output_v6(struct netif *netif, struct pbuf *p, const ip6_addr_t *ipaddr)
 {
     LWIP_UNUSED_ARG(ipaddr);
     return tun_output(netif, p);
 }
-
+#endif
 static err_t tun_init(struct netif *netif)
 {
     if (netif == NULL) {
@@ -151,9 +152,12 @@ static void cmd_ping_on_ping_end(esp_ping_handle_t hdl, void *args)
     }
     if (IP_IS_V4(&target_addr)) {
         ESP_LOGD(TAG, "\n--- %s ping statistics ---\n", inet_ntoa(*ip_2_ip4(&target_addr)));
-    } else {
+    }
+#if LWIP_IPV6
+    else {
         ESP_LOGD(TAG, "\n--- %s ping statistics ---\n", inet6_ntoa(*ip_2_ip6(&target_addr)));
     }
+#endif
     ESP_LOGI(TAG, "%" PRIu32 " packets transmitted, %" PRIu32 " received, %" PRIu32 "%% packet loss, time %" PRIu32 "ms\n",
              transmitted, received, loss, total_time_ms);
     esp_ping_delete_session(hdl);
@@ -168,7 +172,11 @@ esp_err_t eppp_check_connection(esp_netif_t *netif)
     ip_addr_t target_addr = {0};
     esp_netif_ip_info_t ip;
     esp_netif_get_ip_info(netif, &ip);
+#if LWIP_IPV6
     target_addr.u_addr.ip4.addr =  ip.gw.addr;
+#else
+    target_addr.addr =  ip.gw.addr;
+#endif
     config.target_addr = target_addr;
     esp_ping_callbacks_t cbs = {
         .cb_args = netif,
diff --git a/components/eppp_link/examples/slave/sdkconfig.ci.ipv4_only b/components/eppp_link/examples/slave/sdkconfig.ci.ipv4_only
new file mode 100644
index 000000000..4628764ab
--- /dev/null
+++ b/components/eppp_link/examples/slave/sdkconfig.ci.ipv4_only
@@ -0,0 +1 @@
+CONFIG_LWIP_IPV6=n

From c91578c827e7267519bc6a0aee03af9cca9f22b6 Mon Sep 17 00:00:00 2001
From: David Cermak <cermak@espressif.com>
Date: Mon, 18 Aug 2025 11:09:33 +0200
Subject: [PATCH 2/2] bump(eppp): 1.0.0 -> 1.0.1

1.0.1
Bug Fixes
- Support for IPv4-only mode (653328ba, #864)
---
 components/eppp_link/.cz.yaml          | 2 +-
 components/eppp_link/CHANGELOG.md      | 6 ++++++
 components/eppp_link/idf_component.yml | 2 +-
 3 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/components/eppp_link/.cz.yaml b/components/eppp_link/.cz.yaml
index 05a1e661c..58f094071 100644
--- a/components/eppp_link/.cz.yaml
+++ b/components/eppp_link/.cz.yaml
@@ -3,6 +3,6 @@ commitizen:
   bump_message: 'bump(eppp): $current_version -> $new_version'
   pre_bump_hooks: python ../../ci/changelog.py eppp_link
   tag_format: eppp-v$version
-  version: 1.0.0
+  version: 1.0.1
   version_files:
   - idf_component.yml
diff --git a/components/eppp_link/CHANGELOG.md b/components/eppp_link/CHANGELOG.md
index cb24a60bc..46c4a8a18 100644
--- a/components/eppp_link/CHANGELOG.md
+++ b/components/eppp_link/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## [1.0.1](https://github.com/espressif/esp-protocols/commits/eppp-v1.0.1)
+
+### Bug Fixes
+
+- Support for IPv4-only mode ([653328ba](https://github.com/espressif/esp-protocols/commit/653328ba), [#864](https://github.com/espressif/esp-protocols/issues/864))
+
 ## [1.0.0](https://github.com/espressif/esp-protocols/commits/eppp-v1.0.0)
 
 ### Features
diff --git a/components/eppp_link/idf_component.yml b/components/eppp_link/idf_component.yml
index 443f6d2a6..9a240442b 100644
--- a/components/eppp_link/idf_component.yml
+++ b/components/eppp_link/idf_component.yml
@@ -1,4 +1,4 @@
-version: 1.0.0
+version: 1.0.1
 url: https://github.com/espressif/esp-protocols/tree/master/components/eppp_link
 description: The component provides a general purpose PPP connectivity, typically used as WiFi-PPP router
 dependencies: