优化编译判断

Makefile

@@ -2,20 +2,27 @@ CROSS_COMPILE ?=
 CC := $(CROSS_COMPILE)gcc
 STRIP := $(CROSS_COMPILE)strip
 CFLAGS = -Wall -g -O3
-LIB = -lssh2 -pthread -static
+LIB = -lssh2 -pthread 
-OBJ = tunnel
+forward-tunnel = forward-tunnel
+reverse-tunnel = reverse-tunnel
 
+ifeq ($(shell uname -o), GNU/Linux)
+    ifeq ($(shell lsb_release -si), Debian)
+        LIB += -static
         SSH2_LIB := $(shell pkg-config --static --libs --cflags libssh2)
-
+    else
+        SSH2_LIB := $(shell pkg-config --libs --cflags libssh2)
+    endif
+endif
 
 all:forward-tunnel reverse-tunnel
 
 forward-tunnel: forward-tunnel.o
-	$(CC) $(CFLAGS) -o forward-tunnel $^ $(SSH2_LIB) $(LIB)
+	$(CC) $(CFLAGS) -o $(forward-tunnel) $^ $(SSH2_LIB) $(LIB)
 	$(STRIP) forward-tunnel
 
 reverse-tunnel: reverse-tunnel.o
-	$(CC) $(CFLAGS) -o reverse-tunnel $^ $(SSH2_LIB) $(LIB)
+	$(CC) $(CFLAGS) -o $(reverse-tunnel) $^ $(SSH2_LIB) $(LIB)
 	$(STRIP) reverse-tunnel
 
 .c.o:

forward-tunnel.c

@@ -21,11 +21,9 @@ enum {
     AUTH_PUBLICKEY
 };
 
-void *forward_tunnel(void *p)
+void *forward_tunnel(void *sock_)
 {
-
+    int forwardsock = *(int *)sock_;
-    int forwardsock = *(int *)p;
-
     int rc, i, auth = AUTH_NONE;
     struct sockaddr_in sin;
     const char *fingerprint;
@@ -220,6 +218,7 @@ shutdown:
 
 static char help_info(void)
 {
+    int l;
     static const char name[] = "STunnel";
     static const char subject[] = "SSH forward tunnel";
     static const struct {
@@ -252,7 +251,6 @@ static char help_info(void)
     fprintf(stderr, "Version: %s\n", author.version);
     fprintf(stderr, "%s\n", usage);
 
-    int l;
     for (l = 0; s_help[l]; l++) {
         fprintf(stderr, "%s\n", s_help[l]);
     }
@@ -263,7 +261,7 @@ static char help_info(void)
     return 0;
 }
 
-int nice( int increment)
+int nice_( int increment)
 {
     int oldprio = getpriority(PRIO_PROCESS, getpid());
     printf("%d\n", oldprio);
@@ -280,6 +278,8 @@ int main(int argc, char *argv[], char **env)
     int daemon_ = 0;
     int opt;
     char *p = NULL;
+    char *client_ip = NULL;
+    int i, j;
     
     
     char optstring[] = ":dr:s:p:l:u:e:h?";
@@ -333,7 +333,7 @@ int main(int argc, char *argv[], char **env)
         }
     }
 
-    int i, j;
+    // 加密参数(账号密码)
     for (i = 1; i < argc; i++) {
         
         if (0 == strcmp(argv[i], "-e") || 0 == strcmp(argv[i], "-u") || 0 == strcmp(argv[i], "-p"))
@@ -346,7 +346,6 @@ int main(int argc, char *argv[], char **env)
     }
     
     
-    
     printf("SSH Server: %s:%d, Local listen: %s:%d, User&Passwd: [%s]['%s']\n", server_ssh_ip, remote_destport, local_listenip, local_listenport, server_ssh_user, server_ssh_passwd);
 
     listensock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
@@ -384,9 +383,7 @@ int main(int argc, char *argv[], char **env)
     
     fprintf(stderr, "Waiting for TCP connection on %s:%d...\n", inet_ntoa(sin.sin_addr), ntohs(sin.sin_port));
 
-
+    // 后台运行
-
-
     if (daemon_ == 1) {
         if (daemon(1, 1)) {
             perror("daemon");
@@ -394,11 +391,12 @@ int main(int argc, char *argv[], char **env)
         }
     }
 
-
+    // 进程优先级
-    if (-1 == (nice(-20)))          // 进程优先级
+    if (-1 == (nice_(-20)))
-        perror("nice");
+        perror("nice_");
     
 
+    // 多线程设置
     pthread_t thread_id = 0;
     pthread_attr_t attr;
     struct sched_param param;
@@ -409,8 +407,6 @@ int main(int argc, char *argv[], char **env)
         printf("block sigpipe error\n");
     }
 
-   
-
     // 初始化线程属性
     pthread_attr_init(&attr);
 
@@ -421,7 +417,7 @@ int main(int argc, char *argv[], char **env)
     param.sched_priority = 50;
     pthread_attr_setschedparam(&attr, &param);
 
-
+    // 多线程
     while (1) {
         server_addr_len = sizeof(server_addr);
         forwardsock = accept(listensock, (struct sockaddr *)&sin, &server_addr_len);
@@ -430,8 +426,9 @@ int main(int argc, char *argv[], char **env)
             goto shutdown;
         }
         getsockname(forwardsock, (struct sockaddr *)&sin, &server_addr_len);
-        char *ip = inet_ntoa(sin.sin_addr);
+        client_ip = inet_ntoa(sin.sin_addr);
-        printf("Client IP address: %s\n", ip);
+        printf("Client IP address: %s\n", client_ip);
+        client_ip = NULL;
 
         pthread_create(&thread_id, &attr, &forward_tunnel, (void *)&forwardsock);