gfwleak/yzc-http-check
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添加EAGAIN处理

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This commit is contained in:
yzc
2020-01-02 11:03:36 +08:00
parent 0c451bfa44
commit 905c30e2b1
1 changed files with 35 additions and 25 deletions
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60
http_check/src/http_check.c
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@@ -164,8 +164,14 @@ int readNlSock(int sockFd, char *bufPtr, int seqNum, int pId)
do{
//收到内核的应答
if((readLen = recv(sockFd, bufPtr, BUFSIZE - msgLen, 0)) < 0)
{
printf("sock read error!");
{
#if 1
if(errno == EAGAIN)
{
continue;
}
#endif
printf("sock recv return for readLen < 0!");
return -1;
}
@@ -173,11 +179,11 @@ int readNlSock(int sockFd, char *bufPtr, int seqNum, int pId)
//检查header是否有效
if((NLMSG_OK(nlHdr, readLen) == 0) || (nlHdr->nlmsg_type == NLMSG_ERROR))
{
printf("error in recieved packet!\n");
printf("sock recv return for header error!\n");
return -1;
}
if(nlHdr->nlmsg_type == NLMSG_DONE)
if(nlHdr->nlmsg_type == NLMSG_DONE)//内核返回最后一条消息的类型为NLMSG_DONE
{
break;
}
@@ -197,21 +203,26 @@ int readNlSock(int sockFd, char *bufPtr, int seqNum, int pId)
}
//分析返回的路由信息
void parseRoutes(struct nlmsghdr *nlHdr, struct route_info *rtInfo,char *gateway,unsigned int len)
void parseRoutes(struct nlmsghdr *nlHdr,char *gateway,unsigned int len)
{
struct rtmsg *rtMsg = NULL;
struct rtattr *rtAttr = NULL;
int rtLen;
char dst_address[MAX_STR_LEN] = "";
struct route_info rtInfo;
memset(&rtInfo, 0, sizeof(struct route_info));
rtMsg = (struct rtmsg *)NLMSG_DATA(nlHdr);
// If the route is not for AF_INET or does not belong to main routing table
//then return.
//RT_TABLE_LOCAL存储目的地址是本机的路由表项，这些目的地址就是为各个网卡配置的IP地址；
//RT_TABLE_MAIN存储到其它主机的路由表项；
if((rtMsg->rtm_family != AF_INET) || (rtMsg->rtm_table != RT_TABLE_MAIN))
{
return;
}
rtAttr = (struct rtattr *)RTM_RTA(rtMsg);
rtAttr = (struct rtattr *)RTM_RTA(rtMsg); //路由信息
rtLen = RTM_PAYLOAD(nlHdr);
for(;RTA_OK(rtAttr,rtLen);rtAttr = RTA_NEXT(rtAttr,rtLen))
@@ -219,43 +230,43 @@ void parseRoutes(struct nlmsghdr *nlHdr, struct route_info *rtInfo,char *gateway
switch(rtAttr->rta_type)
{
case RTA_OIF:
if_indextoname(*(int *)RTA_DATA(rtAttr), rtInfo->ifName);
if_indextoname(*(int *)RTA_DATA(rtAttr), rtInfo.ifName);
break;
case RTA_GATEWAY:
rtInfo->gateWay = *(u_int *)RTA_DATA(rtAttr);
rtInfo.gateWay = *(uint32_t *)RTA_DATA(rtAttr);
break;
case RTA_PREFSRC:
rtInfo->srcAddr = *(u_int *)RTA_DATA(rtAttr);
rtInfo.srcAddr = *(uint32_t *)RTA_DATA(rtAttr);
break;
case RTA_DST:
rtInfo->dstAddr = *(u_int *)RTA_DATA(rtAttr);
rtInfo.dstAddr = *(uint32_t *)RTA_DATA(rtAttr);
break;
}
}
inet_ntop(AF_INET, &rtInfo->dstAddr, dst_address, MAX_STR_LEN);
inet_ntop(AF_INET, &rtInfo.dstAddr, dst_address, MAX_STR_LEN);
if (strstr(dst_address, "0.0.0.0"))
{
inet_ntop(AF_INET, &rtInfo->gateWay, gateway, len);
inet_ntop(AF_INET, &rtInfo.gateWay, gateway, len);
//printf("%s\n",gateway);
}
return;
}
int get_gateway(char *gateway, unsigned int length)//传入长度
int get_gateway(char *gateway, unsigned int length)
{
struct nlmsghdr *nlMsg = NULL;
struct route_info *rtInfo = NULL;
struct nlmsghdr *nlMsg = NULL;
char msgBuf[BUFSIZE] = "";
int sock, len, msgSeq = 0;
if((sock = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_ROUTE)) < 0)
{
printf("socket creation error!\n");
MESA_handle_runtime_log(error_log_handler, RLOG_LV_FATAL, module_name, "socket create error.");
printf("====line:%d,%s\n",__LINE__,"socket create error.");
return -1;
}
memset(msgBuf, 0, BUFSIZE);
//memset(msgBuf, 0, BUFSIZE);
nlMsg = (struct nlmsghdr *)msgBuf;
nlMsg->nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); // Length of message.
nlMsg->nlmsg_type = RTM_GETROUTE; // Get the routes from kernel routing table
@@ -265,23 +276,22 @@ int get_gateway(char *gateway, unsigned int length)//传入长度
if(send(sock, nlMsg, nlMsg->nlmsg_len, 0) < 0)
{
printf("Write To Socket Failed…\n");
MESA_handle_runtime_log(error_log_handler, RLOG_LV_FATAL, module_name, "write to socket failed.");
printf("====line:%d,%s\n",__LINE__,"write to socket failed.");
goto OUT;
}
if((len = readNlSock(sock, msgBuf, msgSeq, getpid())) < 0)
{
printf("Read From Socket Failed…\n");
MESA_handle_runtime_log(error_log_handler, RLOG_LV_FATAL, module_name, "read from socket failed.");
printf("====line:%d,%s\n",__LINE__,"read from socket failed.");
goto OUT;
}
rtInfo = (struct route_info *)malloc(sizeof(struct route_info));
for(;NLMSG_OK(nlMsg,len);nlMsg = NLMSG_NEXT(nlMsg,len))
{
memset(rtInfo, 0, sizeof(struct route_info));
parseRoutes(nlMsg, rtInfo,gateway, length);
parseRoutes(nlMsg, gateway, length);
}
free(rtInfo);
OUT:
close(sock);
@@ -459,7 +469,7 @@ int http_check_init()
MESA_load_profile_string_nodef(http_check_conf_file, "HTTP", "HTTP_CHECK_ERR_LOG_PATH", http_check_error_log_path, MAX_STR_LEN);
MESA_load_profile_string_nodef(http_check_conf_file, "HTTP", "MODULE_NAME", module_name, MAX_STR_LEN);
MESA_load_profile_int_def(http_check_conf_file, "HTTP", "LOG_LEVEL", &log_level, 30);
printf("*v22*******read_ip:%s,read_port:%d\n",g_http_address, g_http_port);
printf("*v6*******read_ip:%s,read_port:%d\n",g_http_address, g_http_port);
http_check_log_handler = MESA_create_runtime_log_handle(http_check_log_path, RLOG_LV_INFO);
error_log_handler = MESA_create_runtime_log_handle(http_check_error_log_path, log_level);