基于freeDiameter的服务器无法读取接收到的缓冲区

Question

我尝试通过freeDiameter库设置一个具有特定IP地址和端口号的服务器。另一方面，有一个客户端通过freeDiameter库成功发送字符串消息；我在Wireshark上查过了。

所以，问题来了；当我开始从服务器端侦听时，它没有问题，直到客户端发送连接请求；如果你看下面的代码；fd_cnx_serv_accept(监听器("正在侦听名为"strong>"的套接字；听众"绑定到特定的IP地址和端口号。

uint8_t * rcv_buf;
size_t    rcv_size;
struct cnxctx * listener_side = NULL;
int ret;

listener_side = fd_cnx_serv_accept(listener);
ret = fd_cnx_start_clear(listener_side, 0);
if(ret != 0){
std::cout<<side<<" is unable to accept connections."<<std::endl;
return -1;
}

ret = fd_cnx_receive(listener_side, NULL, &rcv_buf, &rcv_size);
if(ret == 0){
std::cout<<"Message received."<<std::endl;
listener_side = NULL;
free(rcv_buf);
}

程序运行良好，直到收到客户端请求；当"时；fd_cnx_serv_accept">接受客户端，程序尝试通过"strong>"接收消息；cnx_receive"；但是程序停止并显示错误"strong>"；分段故障(堆芯倾倒("。然后，我用gdb测试程序，它表明"的309行有问题；hook.c">。这是gdb显示的错误图像。

错误屏幕截图

转录本

multi-thre Thread 0x7fffff72a77 In: fd_hook_call 
[New Thread 0x7fffff72a7700 (LWP 1612914)
Thread 2 "server" received signal SIGSEGEV, Segmentation Fault
[Switching to Thread 0x7fffff72a7700 (LWP 1612914)
--Type <RET> for more, q to quit, c to continue without paging --c
0x00007ffff7f2cefc in fd_hook_call (type=HOOD_DATA_RECEIVED, msg=0x0, peer=0x0, other=0x7ffff72a6be0, pmdl=0x7ffff0000ba8 at /root/projects/start_cnx_free/third-party/libfdcore/hooks.c:309

值得一提的是，我正在尝试编写一个c++程序。我该如何解决这个问题？

Answer 1

我自己解决了这个问题。在程序开始时，我忘记使用fd_hooks_init((来初始化必要的库和对象。这是修改后的代码：

/* Initialize the library -- must come first since it initializes the debug facility */
int ret = fd_libproto_init();
if (ret != 0) {
fprintf(stderr, "Unable to initialize libfdproto: %sn", strerror(ret));
return ret;
}
ret = fd_hooks_init();
if(ret != 0){
std::cout<<"Unable to initialize the hooks."<<std::endl;
return ret;
}
/* Initialize the config with default values */
memset(&g_conf, 0, sizeof(struct fd_config));
fd_g_config = &g_conf;
ret = fd_conf_init();
if (ret != 0) {
printf("Unable to initialize the config with default values.");
return ret;
}
/* Add definitions of the base protocol */
ret = fd_dict_base_protocol(fd_g_config->cnf_dict);
if (ret != 0) {
printf("Unable to add definitions of the base protocol.");
return ret;
}