Following this article, I am trying to get a C program to compile that uses TPC_REPAIR.
在本文之后，我尝试使用TPC_REPAIR编译一个C程序。
http://oroboro.com/dealing-with-network-port-abuse-in-sockets-in-c/
http://oroboro.com/dealing-with-network-port-abuse-in-sockets-in-c/
TCP_REPAIR is defined in
TCP_REPAIR定义在
/usr/src/linux-headers-3.8.0-29/include/uapi/linux/tcp.h
Including this header conflicts with the ones required for other socket APIs.
包含此头与其他套接字api所需的头冲突。
Here's my code
这是我的代码
#include
#include
#include
#include
#include
#include "/usr/src/linux-headers-3.8.0-29/include/uapi/linux/tcp.h"
int main(int argc, char* argv[])
{
int cfd;
struct sockaddr_in addr;
char ch='r';
cfd=socket(AF_INET, SOCK_STREAM, 0);
addr.sin_family=AF_INET;
addr.sin_addr.s_addr=inet_addr("10.160.102.40");
addr.sin_port=htons(9988);
if(connect(cfd, (struct sockaddr *)&addr,
sizeof(addr))<0) {
perror("connect error");
return -1;
}
if(write(cfd, &ch, 1)<0) perror("write");
if(read(cfd, &ch, 1)<0) perror("read");
printf("\nReply from Server: %c\n",ch);
//close(cfd);
int aux = 1;
if(setsockopt(cfd, SOL_TCP, TCP_REPAIR, &aux, sizeof( aux )) <0 )
{
perror( "could not turn on repair mode" );
}
return 0;
}
And here's gcc output
这里是gcc输出
In file included from /usr/include/netinet/tcp.h:56:0,
from new_client.c:5:
/usr/include/x86_64-linux-gnu/sys/types.h:45:18: error: conflicting types for ‘loff_t’
/usr/src/linux-headers-3.8.0-29-generic/include/linux/types.h:45:26: note: previous declaration of ‘loff_t’ was here
/usr/include/x86_64-linux-gnu/sys/types.h:61:17: error: conflicting types for ‘dev_t’
/usr/src/linux-headers-3.8.0-29-generic/include/linux/types.h:15:25: note: previous declaration of ‘dev_t’ was here
/usr/include/x86_64-linux-gnu/sys/types.h:76:19: error: conflicting types for ‘nlink_t’
/usr/src/linux-headers-3.8.0-29-generic/include/linux/types.h:19:17: note: previous declaration of ‘nlink_t’ was here
In file included from /usr/include/x86_64-linux-gnu/sys/types.h:133:0,
from /usr/include/netinet/tcp.h:56,
from new_client.c:5:
/usr/include/time.h:104:19: error: conflicting types for ‘timer_t’
/usr/src/linux-headers-3.8.0-29-generic/include/linux/types.h:25:26: note: previous declaration of ‘timer_t’ was here
In file included from /usr/include/netinet/tcp.h:56:0,
from new_client.c:5:
/usr/include/x86_64-linux-gnu/sys/types.h:198:1: error: conflicting types for ‘int64_t’
/usr/src/linux-headers-3.8.0-29-generic/include/linux/types.h:113:17: note: previous declaration of ‘int64_t’ was here
/usr/include/x86_64-linux-gnu/sys/types.h:204:1: error: conflicting types for ‘u_int64_t’
/usr/src/linux-headers-3.8.0-29-generic/include/linux/types.h:112:17: note: previous declaration of ‘u_int64_t’ was here
In file included from /usr/include/x86_64-linux-gnu/sys/types.h:220:0,
from /usr/include/netinet/tcp.h:56,
from new_client.c:5:
/usr/include/x86_64-linux-gnu/sys/select.h:76:5: error: conflicting types for ‘fd_set’
/usr/src/linux-headers-3.8.0-29-generic/include/linux/types.h:14:26: note: previous declaration of ‘fd_set’ was here
In file included from /usr/include/netinet/tcp.h:56:0,
from new_client.c:5:
/usr/include/x86_64-linux-gnu/sys/types.h:236:20: error: conflicting types for ‘blkcnt_t’
/usr/src/linux-headers-3.8.0-29-generic/include/linux/types.h:134:23: note: previous declaration of ‘blkcnt_t’ was here
In file included from /usr/include/x86_64-linux-gnu/sys/uio.h:29:0,
from /usr/include/x86_64-linux-gnu/sys/socket.h:28,
from /usr/include/netinet/tcp.h:57,
from new_client.c:5:
/usr/include/x86_64-linux-gnu/bits/uio.h:44:8: error: redefinition of ‘struct iovec’
/usr/src/linux-headers-3.8.0-29-generic/include/uapi/linux/uio.h:16:8: note: originally defined here
In file included from /usr/include/x86_64-linux-gnu/sys/socket.h:40:0,
from /usr/include/netinet/tcp.h:57,
from new_client.c:5:
/usr/include/x86_64-linux-gnu/bits/socket.h:180:8: error: redefinition of ‘struct sockaddr’
/usr/src/linux-headers-3.8.0-29-generic/include/uapi/linux/socket.h:19:27: note: originally defined here
/usr/include/x86_64-linux-gnu/bits/socket.h:193:8: error: redefinition of ‘struct __kernel_sockaddr_storage’
/usr/src/linux-headers-3.8.0-29-generic/include/uapi/linux/socket.h:13:8: note: originally defined here
/usr/include/x86_64-linux-gnu/bits/socket.h:204:5: error: expected identifier before numeric constant
/usr/include/x86_64-linux-gnu/bits/socket.h:253:8: error: redefinition of ‘struct msghdr’
/usr/src/linux-headers-3.8.0-29-generic/include/linux/socket.h:47:8: note: originally defined here
/usr/include/x86_64-linux-gnu/bits/socket.h:280:8: error: redefinition of ‘struct cmsghdr’
/usr/src/linux-headers-3.8.0-29-generic/include/linux/socket.h:69:8: note: originally defined here
/usr/include/x86_64-linux-gnu/bits/socket.h:310:24: error: conflicting types for ‘__cmsg_nxthdr’
/usr/src/linux-headers-3.8.0-29-generic/include/linux/socket.h:111:32: note: previous definition of ‘__cmsg_nxthdr’ was here
/usr/include/x86_64-linux-gnu/bits/socket.h:339:5: error: expected identifier before numeric constant
In file included from /usr/include/x86_64-linux-gnu/sys/socket.h:40:0,
from /usr/include/netinet/tcp.h:57,
from new_client.c:5:
/usr/include/x86_64-linux-gnu/bits/socket.h:417:8: error: redefinition of ‘struct linger’
/usr/src/linux-headers-3.8.0-29-generic/include/linux/socket.h:34:8: note: originally defined here
In file included from new_client.c:6:0:
/usr/src/linux-headers-3.8.0-29/include/uapi/linux/tcp.h:24:8: error: redefinition of ‘struct tcphdr’
/usr/include/netinet/tcp.h:92:8: note: originally defined here
/usr/src/linux-headers-3.8.0-29/include/uapi/linux/tcp.h:135:6: error: nested redefinition of ‘enum tcp_ca_state’
/usr/src/linux-headers-3.8.0-29/include/uapi/linux/tcp.h:135:6: error: redeclaration of ‘enum tcp_ca_state’
/usr/include/netinet/tcp.h:179:6: note: originally defined here
/usr/src/linux-headers-3.8.0-29/include/uapi/linux/tcp.h:136:2: error: redeclaration of enumerator ‘TCP_CA_Open’
/usr/include/netinet/tcp.h:181:3: note: previous definition of ‘TCP_CA_Open’ was here
/usr/src/linux-headers-3.8.0-29/include/uapi/linux/tcp.h:138:2: error: redeclaration of enumerator ‘TCP_CA_Disorder’
/usr/include/netinet/tcp.h:182:3: note: previous definition of ‘TCP_CA_Disorder’ was here
/usr/src/linux-headers-3.8.0-29/include/uapi/linux/tcp.h:140:2: error: redeclaration of enumerator ‘TCP_CA_CWR’
/usr/include/netinet/tcp.h:183:3: note: previous definition of ‘TCP_CA_CWR’ was here
/usr/src/linux-headers-3.8.0-29/include/uapi/linux/tcp.h:142:2: error: redeclaration of enumerator ‘TCP_CA_Recovery’
/usr/include/netinet/tcp.h:184:3: note: previous definition of ‘TCP_CA_Recovery’ was here
/usr/src/linux-headers-3.8.0-29/include/uapi/linux/tcp.h:144:2: error: redeclaration of enumerator ‘TCP_CA_Loss’
/usr/include/netinet/tcp.h:185:3: note: previous definition of ‘TCP_CA_Loss’ was here
/usr/src/linux-headers-3.8.0-29/include/uapi/linux/tcp.h:148:8: error: redefinition of ‘struct tcp_info’
/usr/include/netinet/tcp.h:188:8: note: originally defined here
/usr/src/linux-headers-3.8.0-29/include/uapi/linux/tcp.h:193:8: error: redefinition of ‘struct tcp_md5sig’
/usr/include/netinet/tcp.h:235:8: note: originally defined here
4
This is really not useful
这真的没有用
#include "/usr/src/linux-headers-3.8.0-29/include/uapi/linux/tcp.h"
Because either the kernel supports it or it does not. You can check for it like this:
因为内核要么支持它，要么不支持。你可以这样检查:
find /usr/include -type f -exec grep TCP_REPAIR {} /dev/null \;
/usr/include/linux/tcp.h:#define TCP_REPAIR 19 /* TCP sock is under repair right now */
/usr/include/linux/tcp.h:#define TCP_REPAIR_QUEUE 20
/usr/include/linux/tcp.h:#define TCP_REPAIR_OPTIONS 22
if it's there, great, otherwise you'll have to use the workaround.
如果它在那里，很好，否则你将不得不使用变通方法。
Here's an Ubuntu that has it
这是一个Ubuntu
lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 12.10
Release: 12.10
Codename: quantal
It looks like SOL_TCP is only defined in /usr/include/netinet/tcp.h
看起来SOL_TCP只在/usr/include/netinet/tcp.h中定义
find /usr/include -type f -exec grep SOL_TCP {} /dev/null \;
/usr/include/netinet/tcp.h:# define SOL_TCP 6 /* TCP level */
To overcome the unfortunate absence of SOL_TCP in /usr/include/linux/tcp.h. You can try to simply copy it from netinet/tcp.h, it's just a number after all.
为了克服/usr/include/linux/tcp.h中SOL_TCP的不幸缺失您可以尝试从netinet/tcp复制它。h，它毕竟只是一个数字。
#ifndef SOL_TCP
#define SOL_TCP 6
#endif
However, the man page of setsockopt offers an even better approach:
不过，setsockopt的man页面提供了一种更好的方法:
To manipulate options at any other level the protocol number of the appropriate protocol controlling the option is supplied. For example, to indicate that an option is to be interpreted by the TCP protocol, level should be set to the protocol number of TCP; see getprotoent(3).
要在任何其他级别操作选项，提供控制选项的适当协议的协议编号。例如，为了表示一个选项将由TCP协议解释，应该将级别设置为TCP的协议号;看到getprotoent(3)。
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