TCP provides for multiple network applications on one machine by means of network ports. A port is just a number. If an IP address is like the postal address of an apartment building, a port is like a mailbox number— it’s a further subdivision. TCP通过网络端口提供了在一台机器上运行多...
For example, if you’re sending data from Host A to Host B, as shown in Figure 9-1, your bytes leave the application layer on Host A and travel through the transport and network layers on Host A; then they go down to the physical medium, across the medium, and up again through the...
如果有人问我,程序员做的事,最没实际价值,最容易让用户不爽的是什么?回答: —— 安全如果有人问我,程序员做的事,最必要的是什么?回答: —— 安全如果有人问...
= 0 to determine * if TFO is enabled. */ }; 该结构体描述了两种队列的相关信息,第一个是半连接队列的长度,使用atomic_t qlen来表示,第二个是Accept队列链表,使用struct request_sock *rskq_accept_head;来表示 Accept队列链表的头部,struct request_sock *rskq_accept_tail;表示Accept队列链表的尾部。
, multipath will first check if the device supports alua, and if so it will automatically assign the device the alua prioritizer. if the device does not support alua, it will determine the prioritizer as it always does. the default value is no . uid_attribute provides a unique path ...
}if(ioctl(mFbFd, FBIOGET_VSCREENINFO, &vinfo)) {--获取当前fb设备的可变信息,包括分辨率、像素位宽等等,对应内核do_fb_ioctl()函数的命令FBIOGET_VSCREENINFO。qErrnoWarning(errno,"Error reading variable information");returnfalse; } mDepth=determineDepth(vinfo);--得出当前fb设备的色深。mBytesPerLine=...
semanage port -a -t http_port_t -p tcp 3131 httpd を再开します。 # systemctl start httpd ただし、コンテンツにはアクセスできません。 # wget localhost:3131/index.html ... http request sent, awaiting response... 403 forbidden ... sealert ツールの理由を确认します。 # sealert ...
When starting Cumulus Linux for the first time, the management port makes a DHCPv4 request. To determine the IP address of the switch, you can cross reference the MAC address of the switch with your DHCP server. The MAC address is typically located on the side of the switch or on the ...
./scripts/get_maintainer.pl 0001-arm64-fpsimd-Sync-and-zero-pad-FPSIMD-state-for-stre.patch Catalin Marinas <catalin.marinas@arm.com> (maintainer:ARM64 PORT (AARCH64 ARCHITECTURE),commit_signer:21/25=84%,blamed_fixes:2/1=100%) Will Deacon <will@kernel.org> (maintainer:ARM64 PORT...
有些时候,只需要在终端上打印一下栈的回溯信息来帮助你调试。这时可以使用dump_stack()。这个函数只在终端上打印寄存器上下文和函数的跟踪线索。if(!debug_check) { printk(KERN_DEBUG “provide some information…/n”); dump_stack(); } 五printk() ...