feat: add disable_ipv6 option (related #364)

crates/openconnect/src/ffi/mod.rs

@@ -20,6 +20,7 @@ pub(crate) struct ConnectOptions {
   pub csd_wrapper: *const c_char,
 
   pub mtu: u32,
+  pub disable_ipv6: u32,
 }
 
 #[link(name = "vpn")]

crates/openconnect/src/ffi/vpn.c

@@ -64,6 +64,7 @@ int vpn_connect(const vpn_options *options, vpn_connected_callback callback)
     INFO("CSD_USER: %d", options->csd_uid);
     INFO("CSD_WRAPPER: %s", options->csd_wrapper);
     INFO("MTU: %d", options->mtu);
+    INFO("DISABLE_IPV6: %d", options->disable_ipv6);
 
     vpninfo = openconnect_vpninfo_new(options->user_agent, validate_peer_cert, NULL, NULL, print_progress, NULL);
 
@@ -103,6 +104,10 @@ int vpn_connect(const vpn_options *options, vpn_connected_callback callback)
         openconnect_set_reqmtu(vpninfo, mtu);
     }
 
+    if (options->disable_ipv6) {
+        openconnect_disable_ipv6(vpninfo);
+    }
+
     g_cmd_pipe_fd = openconnect_setup_cmd_pipe(vpninfo);
     if (g_cmd_pipe_fd < 0)
     {

crates/openconnect/src/ffi/vpn.h

@@ -21,6 +21,8 @@ typedef struct vpn_options
     const char *csd_wrapper;
 
     const int mtu;
+
+    const int disable_ipv6;
 } vpn_options;
 
 int vpn_connect(const vpn_options *options, vpn_connected_callback callback);
@@ -35,7 +37,7 @@ static char *format_message(const char *format, va_list args)
     int len = vsnprintf(NULL, 0, format, args_copy);
     va_end(args_copy);
 
-    char *buffer = malloc(len + 1);
+    char *buffer = (char*)malloc(len + 1);
     if (buffer == NULL)
     {
         return NULL;

crates/openconnect/src/vpn.rs

@@ -24,6 +24,7 @@ pub struct Vpn {
   csd_wrapper: Option<CString>,
 
   mtu: u32,
+  disable_ipv6: bool,
 
   callback: OnConnectedCallback,
 }
@@ -68,6 +69,7 @@ impl Vpn {
       csd_wrapper: Self::option_to_ptr(&self.csd_wrapper),
 
       mtu: self.mtu,
+      disable_ipv6: self.disable_ipv6 as u32,
     }
   }
 
@@ -110,6 +112,7 @@ pub struct VpnBuilder {
   csd_wrapper: Option<String>,
 
   mtu: u32,
+  disable_ipv6: bool,
 }
 
 impl VpnBuilder {
@@ -126,6 +129,7 @@ impl VpnBuilder {
       csd_wrapper: None,
 
       mtu: 0,
+      disable_ipv6: false,
     }
   }
 
@@ -159,6 +163,11 @@ impl VpnBuilder {
     self
   }
 
+  pub fn disable_ipv6(mut self, disable_ipv6: bool) -> Self {
+    self.disable_ipv6 = disable_ipv6;
+    self
+  }
+
   pub fn build(self) -> Result<Vpn, VpnError> {
     let script = match self.script {
       Some(script) => {
@@ -188,6 +197,7 @@ impl VpnBuilder {
       csd_wrapper: self.csd_wrapper.as_deref().map(Self::to_cstring),
 
       mtu: self.mtu,
+      disable_ipv6: self.disable_ipv6,
 
       callback: Default::default(),
     })