added support for FreeBSD/OpenBSD (#201)

semigodking · Jun 29, 2024 · 82fa950 · 82fa950
1 parent c8e1e6c
commit 82fa950
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Showing 8 changed files with 64 additions and 6 deletions.
diff --git a/Makefile b/Makefile
@@ -25,6 +25,9 @@ endif
 ifeq ($(OS), FreeBSD)
 override CFLAGS +=-I/usr/local/include -L/usr/local//lib
 endif
+ifeq ($(OS), OpenBSD)
+override CFLAGS +=-I/usr/local/include -L/usr/local//lib #same as FreeBSD
+endif
 ifeq ($(OS), Darwin)
 override CFLAGS +=-I/usr/local/opt/openssl/include -L/usr/local/opt/openssl/lib
 SHELL := /bin/bash
@@ -52,7 +55,10 @@ override CFLAGS += -DENABLE_HTTPS_PROXY
 override FEATURES += ENABLE_HTTPS_PROXY
 $(info Compile with HTTPS proxy enabled.)
 endif
-override LIBS += -lssl -lcrypto -ldl
+override LIBS += -lssl -lcrypto
+ifneq ($(OS), OpenBSD)
+override LIBS += -ldl
+endif
 override CFLAGS += -DUSE_CRYPTO_OPENSSL
 endif
 ifdef ENABLE_STATIC
@@ -79,6 +85,9 @@ $(CONF):
 	OpenBSD) \
 		echo "#define USE_PF" >$(CONF) \
 		;; \
+	NetBSD) \
+                echo "#define USE_PF" >$(CONF) \
+                ;; \
 	Darwin) \
 		echo -e "#define USE_PF\n#define _APPLE_" >$(CONF) \
 		;; \

diff --git a/base.c b/base.c
@@ -95,7 +95,7 @@ static base_instance instance = {
 	.log_info = false,
 };
 
-#if defined __FreeBSD__ || defined USE_PF
+#if defined __FreeBSD__ || defined USE_PF  || defined __OpenBSD__ || defined __NetBSD__
 static int redir_open_private(const char *fname, int flags)
 {
 	int fd = open(fname, flags);

diff --git a/libc-compat.h b/libc-compat.h
@@ -42,7 +42,7 @@
 #   define SOL_IP IPPROTO_IP
 #endif
 
-#ifdef __FreeBSD__
+#if defined __FreeBSD__ || defined __OpenBSD__ || defined __NetBSD__
 #ifndef INADDR_LOOPBACK
 #   warning Using hardcoded value for INADDR_LOOPBACK for FreeBSD.
 #   define INADDR_LOOPBACK		0x7F000001

diff --git a/redsocks.c b/redsocks.c
@@ -1022,7 +1022,7 @@ static int redsocks_init_instance(redsocks_instance *instance)
     if (apply_reuseport(fd))
         log_error(LOG_WARNING, "Continue without SO_REUSEPORT enabled");
 
-#if defined(__APPLE__) || defined(__FreeBSD__)
+#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__)
     bindaddr_len = instance->config.bindaddr.ss_len > 0 ? instance->config.bindaddr.ss_len : sizeof(instance->config.bindaddr);
 #else
     bindaddr_len = sizeof(instance->config.bindaddr);

diff --git a/redudp.c b/redudp.c
@@ -1,3 +1,4 @@
+
 /* redsocks2 - transparent TCP/UDP-to-proxy redirector
  * Copyright (C) 2013-2017 Zhuofei Wang <semigodking@gmail.com>
  *
@@ -133,6 +134,22 @@ static int bound_udp_get(const struct sockaddr *addr)
     node->key = key;
     node->ref = 1;
     node->fd = socket(addr->sa_family, SOCK_DGRAM, IPPROTO_UDP);
+#if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__)
+    int on = 1;
+#if defined(__FreeBSD__)
+#ifdef SOL_IPV6
+    if (addr->sa_family == AF_INET) {
+#endif
+        setsockopt(node->fd, IPPROTO_IP, IP_BINDANY, &on, sizeof(on));
+#ifdef SOL_IPV6
+    } else {
+        setsockopt(node->fd, IPPROTO_IPV6, IPV6_BINDANY, &on, sizeof(on));
+    }
+#endif
+#else
+    setsockopt(node->fd, SOL_SOCKET, SO_BINDANY, &on, sizeof(on));
+#endif
+#endif
     node->t_last_rx = redsocks_time(NULL);
     if (node->fd == -1) {
         log_errno(LOG_ERR, "socket");
@@ -300,8 +317,13 @@ void redudp_fwd_pkt_to_sender(redudp_client *client, void *buf, size_t len,
     }
     // TODO: record remote address in client
 
+
     sent = sendto(fd, buf, len, 0,
+#if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__)
+                  (struct sockaddr*)&client->clientaddr, sizeof(struct sockaddr_in));
+#else
                   (struct sockaddr*)&client->clientaddr, sizeof(client->clientaddr));
+#endif
     if (sent != len) {
         redudp_log_error(
             client,
@@ -638,6 +660,10 @@ static int redudp_init_instance(redudp_instance *instance)
                 log_errno(LOG_ERR, "setsockopt(listener, SOL_IP, IP_RECVORIGDSTADDR)");
                 goto fail;
             }
+#if defined(__OpenBSD__) || defined(__NetBSD__)
+            setsockopt(fd, IPPROTO_IP, IP_RECVDSTADDR, &on, sizeof(on));
+            setsockopt(fd, IPPROTO_IP, IP_RECVDSTPORT, &on, sizeof(on));
+#endif
 #ifdef SOL_IPV6
         }
         else {
@@ -646,6 +672,10 @@ static int redudp_init_instance(redudp_instance *instance)
                 log_errno(LOG_ERR, "setsockopt(listener, SOL_IPV6, IPV6_RECVORIGDSTADDR)");
                 goto fail;
             }
+#if defined(__OpenBSD__) || defined(__NetBSD__)
+            setsockopt(fd, IPPROTO_IP, IPV6_RECVPKTINFO, &on, sizeof(on));
+            setsockopt(fd, IPPROTO_IP, IPV6_RECVDSTPORT, &on, sizeof(on));
+#endif
         }
 #endif
         log_error(LOG_INFO, "redudp @ %s: TPROXY", red_inet_ntop(&instance->config.bindaddr, buf1, sizeof(buf1)));
@@ -660,7 +690,7 @@ static int redudp_init_instance(redudp_instance *instance)
     if (apply_reuseport(fd))
         log_error(LOG_WARNING, "Continue without SO_REUSEPORT enabled");
 
-#if defined(__APPLE__) || defined(__FreeBSD__)
+#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__)
     bindaddr_len = instance->config.bindaddr.ss_len > 0 ? instance->config.bindaddr.ss_len : sizeof(instance->config.bindaddr);
 #else
     bindaddr_len = sizeof(instance->config.bindaddr);

diff --git a/socks5-udp.c b/socks5-udp.c
@@ -312,7 +312,11 @@ static void socks5_read_assoc_reply(struct bufferevent *buffev, void *_arg)
         goto fail;
     }
 
+#if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__)
+    error = connect(fd, (struct sockaddr*)&socks5client->udprelayaddr, sizeof(struct sockaddr_in));
+#else
     error = connect(fd, (struct sockaddr*)&socks5client->udprelayaddr, sizeof(socks5client->udprelayaddr));
+#endif
     if (error) {
         redudp_log_errno(client, LOG_NOTICE, "connect");
         goto fail;

diff --git a/tcpdns.c b/tcpdns.c
@@ -463,7 +463,7 @@ static int tcpdns_init_instance(tcpdns_instance *instance)
     if (apply_reuseport(fd))
         log_error(LOG_WARNING, "Continue without SO_REUSEPORT enabled");
 
-#if defined(__APPLE__) || defined(__FreeBSD__)
+#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__)
     bindaddr_len = instance->config.bindaddr.ss_len > 0 ? instance->config.bindaddr.ss_len : sizeof(instance->config.bindaddr);
 #else
     bindaddr_len = sizeof(instance->config.bindaddr);

diff --git a/utils.c b/utils.c
@@ -98,14 +98,29 @@ int red_recv_udp_pkt(
                 }
                 break;
             }
+#if defined(__OpenBSD__) || defined(__NetBSD__)
+            //TODO: support IPv6
+            else if (cmsg->cmsg_type == IP_RECVDSTADDR || cmsg->cmsg_type == IP_RECVDSTPORT){
+                struct sockaddr* cmsgaddr = (struct sockaddr*)CMSG_DATA(cmsg);
+                toaddr->ss_family=AF_INET;
+                struct sockaddr_in *toaddr_in = (struct sockaddr_in *)toaddr;
+                if (cmsg->cmsg_type == IP_RECVDSTADDR) {
+                    memcpy(&toaddr_in->sin_addr, cmsgaddr, sizeof(struct in_addr));
+                } else if (cmsg->cmsg_type == IP_RECVDSTPORT) {
+                    memcpy(&toaddr_in->sin_port, cmsgaddr, sizeof(in_port_t));
+                }
+            }
+#endif
             else {
                 log_error(LOG_WARNING, "unexepcted cmsg (level,type) = (%d,%d)",
                     cmsg->cmsg_level, cmsg->cmsg_type);
             }
         }
         if (toaddr->ss_family == 0) {
+#if !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__NetBSD__)
             log_error(LOG_WARNING, "(SOL_IP, IP_ORIGDSTADDR) not found");
             return -1;
+#endif
         }
     }