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Diffstat (limited to 'netcon/LWIPStack.hpp')
| -rw-r--r-- | netcon/LWIPStack.hpp | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/netcon/LWIPStack.hpp b/netcon/LWIPStack.hpp new file mode 100644 index 00000000..fedbdd5f --- /dev/null +++ b/netcon/LWIPStack.hpp @@ -0,0 +1,217 @@ +/* + * ZeroTier One - Network Virtualization Everywhere + * Copyright (C) 2011-2015 ZeroTier, Inc. + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * + * -- + * + * ZeroTier may be used and distributed under the terms of the GPLv3, which + * are available at: http://www.gnu.org/licenses/gpl-3.0.html + * + * If you would like to embed ZeroTier into a commercial application or + * redistribute it in a modified binary form, please contact ZeroTier Networks + * LLC. Start here: http://www.zerotier.com/ + */ + +#ifndef ZT_LWIPSTACK_H +#define ZT_LWIPSTACK_H + +#include "lwip/mem.h" +#include "lwip/pbuf.h" +#include "lwip/ip_addr.h" +#include "lwip/netif.h" + +#include "../node/Mutex.hpp" + +#include <stdio.h> +#include <dlfcn.h> + +#ifdef D_GNU_SOURCE + #define _GNU_SOURCE +#endif + +typedef ip_addr ip_addr_t; +struct tcp_pcb; + +#define TCP_WRITE_SIG struct tcp_pcb *pcb, const void *arg, u16_t len, u8_t apiflags +#define TCP_SENT_SIG struct tcp_pcb * pcb, err_t (* sent)(void * arg, struct tcp_pcb * tpcb, u16_t len) +#define TCP_NEW_SIG void +#define TCP_SNDBUF_SIG struct tcp_pcb * pcb +#define TCP_CONNECT_SIG struct tcp_pcb * pcb, struct ip_addr * ipaddr, u16_t port, err_t (* connected)(void * arg, struct tcp_pcb * tpcb, err_t err) +#define TCP_RECV_SIG struct tcp_pcb * pcb, err_t (* recv)(void * arg, struct tcp_pcb * tpcb, struct pbuf * p, err_t err) +#define TCP_RECVED_SIG struct tcp_pcb * pcb, u16_t len +#define TCP_ERR_SIG struct tcp_pcb * pcb, void (* err)(void * arg, err_t err) +#define TCP_POLL_SIG struct tcp_pcb * pcb, err_t (* poll)(void * arg, struct tcp_pcb * tpcb), u8_t interval +#define TCP_ARG_SIG struct tcp_pcb * pcb, void * arg +#define TCP_CLOSE_SIG struct tcp_pcb * pcb +#define TCP_ABORT_SIG struct tcp_pcb * pcb +#define TCP_OUTPUT_SIG struct tcp_pcb * pcb +#define TCP_ACCEPT_SIG struct tcp_pcb * pcb, err_t (* accept)(void * arg, struct tcp_pcb * newpcb, err_t err) +#define TCP_LISTEN_SIG struct tcp_pcb * pcb +#define TCP_LISTEN_WITH_BACKLOG_SIG struct tcp_pcb * pcb, u8_t backlog +#define TCP_BIND_SIG struct tcp_pcb * pcb, struct ip_addr * ipaddr, u16_t port +#define PBUF_FREE_SIG struct pbuf *p +#define PBUF_ALLOC_SIG pbuf_layer layer, u16_t length, pbuf_type type +#define LWIP_HTONS_SIG u16_t x +#define LWIP_NTOHS_SIG u16_t x +#define IPADDR_NTOA_SIG const ip_addr_t *addr +#define ETHARP_OUTPUT_SIG struct netif *netif, struct pbuf *q, ip_addr_t *ipaddr +#define ETHERNET_INPUT_SIG struct pbuf *p, struct netif *netif +#define TCP_INPUT_SIG struct pbuf *p, struct netif *inp +#define IP_INPUT_SIG struct pbuf *p, struct netif *inp +#define NETIF_SET_DEFAULT_SIG struct netif *netif +#define NETIF_ADD_SIG struct netif *netif, ip_addr_t *ipaddr, ip_addr_t *netmask, ip_addr_t *gw, void *state, netif_init_fn init, netif_input_fn input +#define NETIF_SET_UP_SIG struct netif *netif +#define NETIF_POLL_SIG struct netif *netif + +namespace ZeroTier { + +/** + * Loads an instance of liblwip.so in a private memory arena + * + * This uses dlmopen() to load an instance of the LWIP stack into its + * own private memory space. This is done to get around the stack's + * lack of thread-safety or multi-instance support. The alternative + * would be to massively refactor the stack so everything lives in a + * state object instead of static memory space. + */ +class LWIPStack +{ +public: + void *_libref; + + void (*_lwip_init)(); + err_t (*_tcp_write)(TCP_WRITE_SIG); + void (*_tcp_sent)(TCP_SENT_SIG); + struct tcp_pcb * (*_tcp_new)(TCP_NEW_SIG); + u16_t (*_tcp_sndbuf)(TCP_SNDBUF_SIG); + err_t (*_tcp_connect)(TCP_CONNECT_SIG); + void (*_tcp_recv)(TCP_RECV_SIG); + void (*_tcp_recved)(TCP_RECVED_SIG); + void (*_tcp_err)(TCP_ERR_SIG); + void (*_tcp_poll)(TCP_POLL_SIG); + void (*_tcp_arg)(TCP_ARG_SIG); + err_t (*_tcp_close)(TCP_CLOSE_SIG); + void (*_tcp_abort)(TCP_ABORT_SIG); + err_t (*_tcp_output)(TCP_OUTPUT_SIG); + void (*_tcp_accept)(TCP_ACCEPT_SIG); + struct tcp_pcb * (*_tcp_listen)(TCP_LISTEN_SIG); + struct tcp_pcb * (*_tcp_listen_with_backlog)(TCP_LISTEN_WITH_BACKLOG_SIG); + err_t (*_tcp_bind)(TCP_BIND_SIG); + void (*_etharp_tmr)(void); + void (*_tcp_tmr)(void); + u8_t (*_pbuf_free)(PBUF_FREE_SIG); + struct pbuf * (*_pbuf_alloc)(PBUF_ALLOC_SIG); + u16_t (*_lwip_htons)(LWIP_HTONS_SIG); + u16_t (*_lwip_ntohs)(LWIP_NTOHS_SIG); + char* (*_ipaddr_ntoa)(IPADDR_NTOA_SIG); + err_t (*_etharp_output)(ETHARP_OUTPUT_SIG); + err_t (*_ethernet_input)(ETHERNET_INPUT_SIG); + void (*_tcp_input)(TCP_INPUT_SIG); + err_t (*_ip_input)(IP_INPUT_SIG); + void (*_netif_set_default)(NETIF_SET_DEFAULT_SIG); + struct netif * (*_netif_add)(NETIF_ADD_SIG); + void (*_netif_set_up)(NETIF_SET_UP_SIG); + void (*_netif_poll)(NETIF_POLL_SIG); + + + Mutex _lock; + + LWIPStack(const char* path) : + _libref(NULL) + { + _libref = dlmopen(LM_ID_NEWLM, path, RTLD_NOW); + if(_libref == NULL) + printf("dlerror(): %s\n", dlerror()); + + _lwip_init = (void(*)(void))dlsym(_libref, "lwip_init"); + _tcp_write = (err_t(*)(TCP_WRITE_SIG))dlsym(_libref, "tcp_write"); + _tcp_sent = (void(*)(TCP_SENT_SIG))dlsym(_libref, "tcp_sent"); + _tcp_new = (struct tcp_pcb*(*)(TCP_NEW_SIG))dlsym(_libref, "tcp_new"); + _tcp_sndbuf = (u16_t(*)(TCP_SNDBUF_SIG))dlsym(_libref, "tcp_sndbuf"); + _tcp_connect = (err_t(*)(TCP_CONNECT_SIG))dlsym(_libref, "tcp_connect"); + _tcp_recv = (void(*)(TCP_RECV_SIG))dlsym(_libref, "tcp_recv"); + _tcp_recved = (void(*)(TCP_RECVED_SIG))dlsym(_libref, "tcp_recved"); + _tcp_err = (void(*)(TCP_ERR_SIG))dlsym(_libref, "tcp_err"); + _tcp_poll = (void(*)(TCP_POLL_SIG))dlsym(_libref, "tcp_poll"); + _tcp_arg = (void(*)(TCP_ARG_SIG))dlsym(_libref, "tcp_arg"); + _tcp_close = (err_t(*)(TCP_CLOSE_SIG))dlsym(_libref, "tcp_close"); + _tcp_abort = (void(*)(TCP_ABORT_SIG))dlsym(_libref, "tcp_abort"); + _tcp_output = (err_t(*)(TCP_OUTPUT_SIG))dlsym(_libref, "tcp_output"); + _tcp_accept = (void(*)(TCP_ACCEPT_SIG))dlsym(_libref, "tcp_accept"); + _tcp_listen = (struct tcp_pcb*(*)(TCP_LISTEN_SIG))dlsym(_libref, "tcp_listen"); + _tcp_listen_with_backlog = (struct tcp_pcb*(*)(TCP_LISTEN_WITH_BACKLOG_SIG))dlsym(_libref, "tcp_listen_with_backlog"); + _tcp_bind = (err_t(*)(TCP_BIND_SIG))dlsym(_libref, "tcp_bind"); + _etharp_tmr = (void(*)(void))dlsym(_libref, "etharp_tmr"); + _tcp_tmr = (void(*)(void))dlsym(_libref, "tcp_tmr"); + _pbuf_free = (u8_t(*)(PBUF_FREE_SIG))dlsym(_libref, "pbuf_free"); + _pbuf_alloc = (struct pbuf*(*)(PBUF_ALLOC_SIG))dlsym(_libref, "pbuf_alloc"); + _lwip_htons = (u16_t(*)(LWIP_HTONS_SIG))dlsym(_libref, "lwip_htons"); + _lwip_ntohs = (u16_t(*)(LWIP_NTOHS_SIG))dlsym(_libref, "lwip_ntohs"); + _ipaddr_ntoa = (char*(*)(IPADDR_NTOA_SIG))dlsym(_libref, "ipaddr_ntoa"); + _etharp_output = (err_t(*)(ETHARP_OUTPUT_SIG))dlsym(_libref, "etharp_output"); + _ethernet_input = (err_t(*)(ETHERNET_INPUT_SIG))dlsym(_libref, "ethernet_input"); + _tcp_input = (void(*)(TCP_INPUT_SIG))dlsym(_libref, "tcp_input"); + _ip_input = (err_t(*)(IP_INPUT_SIG))dlsym(_libref, "ip_input"); + _netif_set_default = (void(*)(NETIF_SET_DEFAULT_SIG))dlsym(_libref, "netif_set_default"); + _netif_add = (struct netif*(*)(NETIF_ADD_SIG))dlsym(_libref, "netif_add"); + _netif_set_up = (void(*)(NETIF_SET_UP_SIG))dlsym(_libref, "netif_set_up"); + _netif_poll = (void(*)(NETIF_POLL_SIG))dlsym(_libref, "netif_poll"); + } + + ~LWIPStack() + { + if (_libref) + dlclose(_libref); + } + + inline void lwip_init() throw() { Mutex::Lock _l(_lock); return _lwip_init(); } + inline err_t tcp_write(TCP_WRITE_SIG) throw() { Mutex::Lock _l(_lock); return _tcp_write(pcb,arg,len,apiflags); } + inline void tcp_sent(TCP_SENT_SIG) throw() { Mutex::Lock _l(_lock); return _tcp_sent(pcb,sent); } + inline struct tcp_pcb * tcp_new(TCP_NEW_SIG) throw() { Mutex::Lock _l(_lock); return _tcp_new(); } + inline u16_t tcp_sndbuf(TCP_SNDBUF_SIG) throw() { Mutex::Lock _l(_lock); return _tcp_sndbuf(pcb); } + inline err_t tcp_connect(TCP_CONNECT_SIG) throw() { Mutex::Lock _l(_lock); return _tcp_connect(pcb,ipaddr,port,connected); } + inline void tcp_recv(TCP_RECV_SIG) throw() { Mutex::Lock _l(_lock); return _tcp_recv(pcb,recv); } + inline void tcp_recved(TCP_RECVED_SIG) throw() { Mutex::Lock _l(_lock); return _tcp_recved(pcb,len); } + inline void tcp_err(TCP_ERR_SIG) throw() { Mutex::Lock _l(_lock); return _tcp_err(pcb,err); } + inline void tcp_poll(TCP_POLL_SIG) throw() { Mutex::Lock _l(_lock); return _tcp_poll(pcb,poll,interval); } + inline void tcp_arg(TCP_ARG_SIG) throw() { Mutex::Lock _l(_lock); return _tcp_arg(pcb,arg); } + inline err_t tcp_close(TCP_CLOSE_SIG) throw() { Mutex::Lock _l(_lock); return _tcp_close(pcb); } + inline void tcp_abort(TCP_ABORT_SIG) throw() { Mutex::Lock _l(_lock); return _tcp_abort(pcb); } + inline err_t tcp_output(TCP_OUTPUT_SIG) throw() { Mutex::Lock _l(_lock); return _tcp_output(pcb); } + inline void tcp_accept(TCP_ACCEPT_SIG) throw() { Mutex::Lock _l(_lock); return _tcp_accept(pcb,accept); } + inline struct tcp_pcb * tcp_listen(TCP_LISTEN_SIG) throw() { Mutex::Lock _l(_lock); return _tcp_listen(pcb); } + inline struct tcp_pcb * tcp_listen_with_backlog(TCP_LISTEN_WITH_BACKLOG_SIG) throw() { Mutex::Lock _l(_lock); return _tcp_listen_with_backlog(pcb,backlog); } + inline err_t tcp_bind(TCP_BIND_SIG) throw() { Mutex::Lock _l(_lock); return _tcp_bind(pcb,ipaddr,port); } + inline void etharp_tmr(void) throw() { Mutex::Lock _l(_lock); return _etharp_tmr(); } + inline void tcp_tmr(void) throw() { Mutex::Lock _l(_lock); return _tcp_tmr(); } + inline u8_t pbuf_free(PBUF_FREE_SIG) throw() { Mutex::Lock _l(_lock); return _pbuf_free(p); } + inline struct pbuf * pbuf_alloc(PBUF_ALLOC_SIG) throw() { Mutex::Lock _l(_lock); return _pbuf_alloc(layer,length,type); } + inline u16_t lwip_htons(LWIP_HTONS_SIG) throw() { Mutex::Lock _l(_lock); return _lwip_htons(x); } + inline u16_t lwip_ntohs(LWIP_NTOHS_SIG) throw() { Mutex::Lock _l(_lock); return _lwip_ntohs(x); } + inline char* ipaddr_ntoa(IPADDR_NTOA_SIG) throw() { Mutex::Lock _l(_lock); return _ipaddr_ntoa(addr); } + inline err_t etharp_output(ETHARP_OUTPUT_SIG) throw() { Mutex::Lock _l(_lock); return _etharp_output(netif,q,ipaddr); } + inline err_t ethernet_input(ETHERNET_INPUT_SIG) throw() { Mutex::Lock _l(_lock); return _ethernet_input(p,netif); } + inline void tcp_input(TCP_INPUT_SIG) throw() { Mutex::Lock _l(_lock); return _tcp_input(p,inp); } + inline err_t ip_input(IP_INPUT_SIG) throw() { Mutex::Lock _l(_lock); return _ip_input(p,inp); } + inline void netif_set_default(NETIF_SET_DEFAULT_SIG) throw() { Mutex::Lock _l(_lock); return _netif_set_default(netif); } + inline struct netif * netif_add(NETIF_ADD_SIG) throw() { Mutex::Lock _l(_lock); return _netif_add(netif,ipaddr,netmask,gw,state,init,input); } + inline void netif_set_up(NETIF_SET_UP_SIG) throw() { Mutex::Lock _l(_lock); return _netif_set_up(netif); } + inline void netif_poll(NETIF_POLL_SIG) throw() { Mutex::Lock _l(_lock); return _netif_poll(netif); } +}; + +} // namespace ZeroTier + +#endif |