add 'extern "C" {}' for cplusplus in ppp headers

src/include/netif/ppp/ccp.h

@@ -36,6 +36,10 @@
 #ifndef CCP_H
 #define CCP_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /*
  * CCP codes.
  */
@@ -152,5 +156,9 @@ extern const struct protent ccp_protent;
 
 void ccp_resetrequest(ppp_pcb *pcb);  /* Issue a reset-request. */
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* CCP_H */
 #endif /* PPP_SUPPORT && CCP_SUPPORT */

src/include/netif/ppp/chap-new.h

@@ -36,6 +36,10 @@
 
 #include "ppp.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /*
  * CHAP packets begin with a standard header with code, id, len (2 bytes).
  */
@@ -188,5 +192,9 @@ extern void chap_auth_with_peer(ppp_pcb *pcb, const char *our_name, int digest_c
 /* Represents the CHAP protocol to the main pppd code */
 extern const struct protent chap_protent;
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* CHAP_H */
 #endif /* PPP_SUPPORT && CHAP_SUPPORT */

src/include/netif/ppp/ecp.h

@@ -34,6 +34,13 @@
 #include "netif/ppp/ppp_opts.h"
 #if PPP_SUPPORT && ECP_SUPPORT  /* don't build if not configured for use in lwipopts.h */
 
+#ifndef ECP_H
+#define ECP_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 typedef struct ecp_options {
     bool required;		/* Is ECP required? */
     unsigned enctype;		/* Encryption type */
@@ -47,4 +54,9 @@ extern ecp_options ecp_hisoptions[];
 
 extern const struct protent ecp_protent;
 
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* ECP_H */
 #endif /* PPP_SUPPORT && ECP_SUPPORT */

src/include/netif/ppp/eui64.h

@@ -41,6 +41,10 @@
 #ifndef EUI64_H
 #define EUI64_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /*
  * @todo:
  *
@@ -90,5 +94,9 @@ typedef union
 
 char *eui64_ntoa(eui64_t);	/* Returns ascii representation of id */
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* EUI64_H */
 #endif /* PPP_SUPPORT && PPP_IPV6_SUPPORT */

src/include/netif/ppp/fsm.h

@@ -50,6 +50,10 @@
 
 #include "ppp.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /*
  * Packet header = Code, id, length.
  */
@@ -170,6 +174,9 @@ void fsm_input(fsm *f, u_char *inpacket, int l);
 void fsm_protreject(fsm *f);
 void fsm_sdata(fsm *f, u_char code, u_char id, const u_char *data, int datalen);
 
+#ifdef __cplusplus
+}
+#endif
 
 #endif /* FSM_H */
 #endif /* PPP_SUPPORT */

src/include/netif/ppp/ipcp.h

@@ -48,6 +48,10 @@
 #ifndef IPCP_H
 #define	IPCP_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /*
  * Options.
  */
@@ -122,5 +126,9 @@ char *ip_ntoa (u32_t);
 
 extern const struct protent ipcp_protent;
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* IPCP_H */
 #endif /* PPP_SUPPORT && PPP_IPV4_SUPPORT */

src/include/netif/ppp/ipv6cp.h

@@ -146,6 +146,10 @@
 
 #include "eui64.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /*
  * Options.
  */
@@ -179,5 +183,9 @@ typedef struct ipv6cp_options {
 
 extern const struct protent ipv6cp_protent;
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* IPV6CP_H */
 #endif /* PPP_SUPPORT && PPP_IPV6_SUPPORT */

src/include/netif/ppp/lcp.h

@@ -50,6 +50,10 @@
 
 #include "ppp.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /*
  * Options.
  */
@@ -167,5 +171,9 @@ extern const struct protent lcp_protent;
 #define DEFLOOPBACKFAIL	10
 #endif /* moved to ppp_opts.h */
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* LCP_H */
 #endif /* PPP_SUPPORT */

src/include/netif/ppp/magic.h

@@ -80,6 +80,10 @@
 #ifndef MAGIC_H
 #define MAGIC_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /***********************
 *** PUBLIC FUNCTIONS ***
 ***********************/
@@ -117,6 +121,10 @@ void magic_random_bytes(unsigned char *buf, u32_t buf_len);
  */
 u32_t magic_pow(u8_t pow);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* MAGIC_H */
 
 #endif /* PPP_SUPPORT */

src/include/netif/ppp/mppe.h

@@ -41,6 +41,10 @@
 
 #include "netif/ppp/pppcrypt.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #define MPPE_PAD		4	/* MPPE growth per frame */
 #define MPPE_MAX_KEY_LEN	16	/* largest key length (128-bit) */
 
@@ -169,5 +173,9 @@ err_t mppe_compress(ppp_pcb *pcb, ppp_mppe_state *state, struct pbuf **pb, u16_t
 void mppe_decomp_reset(ppp_pcb *pcb, ppp_mppe_state *state);
 err_t mppe_decompress(ppp_pcb *pcb, ppp_mppe_state *state, struct pbuf **pb);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* MPPE_H */
 #endif /* PPP_SUPPORT && MPPE_SUPPORT */

src/include/netif/ppp/ppp.h

@@ -47,6 +47,10 @@
 #include "lwip/ip6_addr.h"
 #endif /* PPP_IPV6_SUPPORT */
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* Disable non-working or rarely used PPP feature, so rarely that we don't want to bloat ppp_opts.h with them */
 #ifndef PPP_OPTIONS
 #define PPP_OPTIONS         0
@@ -685,6 +689,10 @@ err_t ppp_ioctl(ppp_pcb *pcb, u8_t cmd, void *arg);
 #define ppp_set_netif_linkcallback(ppp, link_cb)           \
         netif_set_link_callback(ppp->netif, link_cb);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* PPP_H */
 
 #endif /* PPP_SUPPORT */

src/include/netif/ppp/ppp_impl.h

@@ -53,6 +53,10 @@
 #include "ppp.h"
 #include "pppdebug.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /*
  * Memory used for control packets.
  *
@@ -710,5 +714,9 @@ void ppp_dump_packet(ppp_pcb *pcb, const char *tag, unsigned char *p, int len);
  * 1 + PPP_IPV4_SUPPORT + PPP_IPV6_SUPPORT + CCP_SUPPORT
  */
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* PPP_SUPPORT */
 #endif /* LWIP_HDR_PPP_IMPL_H */

src/include/netif/ppp/pppcrypt.h

@@ -44,6 +44,10 @@
  */
 #include "lwip/arch.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /*
  * Map hashes and ciphers functions to PolarSSL
  */
@@ -131,6 +135,10 @@
 
 void pppcrypt_56_to_64_bit_key(u_char *key, u_char *des_key);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* PPPCRYPT_H */
 
 #endif /* PPP_SUPPORT */

src/include/netif/ppp/pppdebug.h

@@ -40,6 +40,10 @@
 #ifndef PPPDEBUG_H
 #define PPPDEBUG_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* Trace levels. */
 #define LOG_CRITICAL  (PPP_DEBUG | LWIP_DBG_LEVEL_SEVERE)
 #define LOG_ERR       (PPP_DEBUG | LWIP_DBG_LEVEL_SEVERE)
@@ -75,6 +79,10 @@
 
 #endif /* PPP_DEBUG */
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* PPPDEBUG_H */
 
 #endif /* PPP_SUPPORT */

src/include/netif/ppp/pppoe.h

@@ -76,6 +76,10 @@
 #include "ppp.h"
 #include "lwip/etharp.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #ifdef PACK_STRUCT_USE_INCLUDES
 #  include "arch/bpstruct.h"
 #endif
@@ -174,6 +178,10 @@ ppp_pcb *pppoe_create(struct netif *pppif,
 void pppoe_disc_input(struct netif *netif, struct pbuf *p);
 void pppoe_data_input(struct netif *netif, struct pbuf *p);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* PPP_OE_H */
 
 #endif /* PPP_SUPPORT && PPPOE_SUPPORT */

src/include/netif/ppp/pppol2tp.h

@@ -39,6 +39,10 @@
 
 #include "ppp.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* Timeout */
 #define PPPOL2TP_CONTROL_TIMEOUT         (5*1000)  /* base for quick timeout calculation */
 #define PPPOL2TP_SLOW_RETRY              (60*1000) /* persistent retry interval */
@@ -197,5 +201,9 @@ ppp_pcb *pppol2tp_create(struct netif *pppif,
        const u8_t *secret, u8_t secret_len,
        ppp_link_status_cb_fn link_status_cb, void *ctx_cb);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* PPPOL2TP_H */
 #endif /* PPP_SUPPORT && PPPOL2TP_SUPPORT */

src/include/netif/ppp/pppos.h

@@ -42,6 +42,10 @@
 #include "ppp.h"
 #include "vj.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* PPP packet parser states.  Current state indicates operation yet to be
  * completed. */
 enum {
@@ -114,5 +118,9 @@ void pppos_input(ppp_pcb *ppp, u8_t* data, int len);
 err_t pppos_input_sys(struct pbuf *p, struct netif *inp);
 #endif /* !NO_SYS && !PPP_INPROC_IRQ_SAFE */
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* PPPOS_H */
 #endif /* PPP_SUPPORT && PPPOL2TP_SUPPORT */

src/include/netif/ppp/upap.h

@@ -50,6 +50,10 @@
 
 #include "ppp.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /*
  * Packet header = Code, id, length.
  */
@@ -119,5 +123,9 @@ void upap_authpeer(ppp_pcb *pcb);
 
 extern const struct protent pap_protent;
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* UPAP_H */
 #endif /* PPP_SUPPORT && PAP_SUPPORT */

src/include/netif/ppp/vj.h

@@ -31,6 +31,10 @@
 #include "lwip/ip.h"
 #include "lwip/priv/tcp_priv.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #define MAX_SLOTS 16 /* must be > 2 and < 256 */
 #define MAX_HDR   128
 
@@ -156,6 +160,10 @@ extern void  vj_uncompress_err   (struct vjcompress *comp);
 extern int   vj_uncompress_uncomp(struct pbuf *nb, struct vjcompress *comp);
 extern int   vj_uncompress_tcp   (struct pbuf **nb, struct vjcompress *comp);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* VJ_H */
 
 #endif /* PPP_SUPPORT && VJ_SUPPORT */