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同时使用 lwip 和AT_SOCKET 用于MQTT，如何选择使用LWIP还是AT_SO...

发布于 2018-08-26 09:40:01 浏览：2181 订阅该版

2 个回答

hailong 2018-08-26

这家伙很懒，什么也没写！

hailong 2018-08-26

这家伙很懒，什么也没写！

[i=s] 本帖最后由 hailong 于 2018-8-26 15:25 编辑 [/i]

我修改了一些代码，能够在连接或断开时，选择使用lwip连接还是at_scoket 连接
1. int sal_getaddrinfo(const char *nodename,
       const char *servname,
       const struct addrinfo *hints,
       struct addrinfo **res)
{
    int i;
	
	
		for (i = 0; i < SAL_PROTO_FAMILIES_NUM; ++i)
    {
        if (proto_families[i].family == link_type && proto_families[i].getaddrinfo )
        {
							return proto_families[i].getaddrinfo(nodename, servname, hints, res);
        }
    }

//    for (i = 0; i < SAL_PROTO_FAMILIES_NUM; ++i)
//    {
//        if (proto_families[i].getaddrinfo)
//        {
//						
//						if(proto_families[i].getaddrinfo(nodename, servname, hints, res) == 0)
//							return proto_families[i].getaddrinfo(nodename, servname, hints, res);
//						else 
//							continue;
//						
//						//return proto_families[i].getaddrinfo(nodename, servname, hints, res);
//        }
//    }

return -1;
}

2.void sal_freeaddrinfo(struct addrinfo *ai)
{
    int i;

for (i = 0; i < SAL_PROTO_FAMILIES_NUM; ++i)
    {
        if (proto_families[i].freeaddrinfo)
        {
						if(ai->ai_family == proto_families[i].family)
							proto_families[i].freeaddrinfo(ai);
						else
							continue;
						
						//proto_families[i].freeaddrinfo(ai);
						
            return;
        }
    }
}
3.int sal_gethostbyname_r(const char *name, struct hostent *ret, char *buf,
                size_t buflen, struct hostent **result, int *h_errnop)
{
    int i;

for (i = 0; i < SAL_PROTO_FAMILIES_NUM; ++i)
    {
        if (proto_families[i].gethostbyname_r && proto_families[i].family == link_type)
        {
							return proto_families[i].gethostbyname_r(name, ret, buf, buflen, result, h_errnop);	
        }
				
//				if (proto_families[i].gethostbyname_r)
//        {
//						if(proto_families[i].gethostbyname_r(name, ret, buf, buflen, result, h_errnop) ==0)
//							return proto_families[i].gethostbyname_r(name, ret, buf, buflen, result, h_errnop);
//						else
//							continue;
//							
//        }
    }

return -1;
}
4.struct hostent *sal_gethostbyname(const char *name)
{
    int i;

for (i = 0; i < SAL_PROTO_FAMILIES_NUM; ++i)
    {
        if (proto_families[i].gethostbyname && proto_families[i].family == link_type)
        {
							return proto_families[i].gethostbyname(name);
        }
				
//				if (proto_families[i].gethostbyname)
//        {
//						if(proto_families[i].gethostbyname(name)!=0)
//							return proto_families[i].gethostbyname(name);
//						else
//							continue;
//						
//						
//						//return proto_families[i].gethostbyname(name);
//        }
    }

return RT_NULL;
}