函数： #include #include int getsockopt(int sock, int level, int optname,...optname：需要访问的选项名 （后面会有）（取决于level） optval：对于getsockopt()，指向返回选项值的缓冲。对于setsockopt()，指向包含新选项值的缓冲。...optlen：对于getsockopt()，作为入口参数时，选项值的最大长度。作为出口参数时，选项值的实际长度。对于setsockopt()，现选项的长度。
问题背景 调用 setsockopt 设置 socket 属性失败，或者 getsockopt 获取 socket 属性失败。 2....问题描述 调用 setsockopt、getsockopt 时返回 -1，且 errno 为 ENOPROTOOPT(92)。 3.
thingsboard的集群部署通过docker-compose方式部署时没有出现任何问题，但是使用portainer（docker swarm）方式进行部署时haproxy服务报"getsockopt
1 getsockopt和setsockopt函数 这两个函数仅用于套接字： #include int getsockopt(int sockfd, int level...level(级别)指定系统中解释选项的代码或为通用套接字代码，或为某个特定于协议的代码 optval是一个指向某个变量(optval)的指针，setsockopt从*optval中取得选项待设置的新值，getsockopt...则把已获取的选项当前值存放到*optval，*optval的大小由最后一个参数optlen指定，它对于setsockopt是一个值参数，对于getsockopt是一个值-结果参数* 调用getsockopt
) getsockopt(...) method of socket...._socketobject instance getsockopt(level, option[, buffersize]) -> value Get a socket option. ...其中 setsockopt 和 getsockopt 中的 level、option 参数需要查看uninx 帮助手册去和获得相关信息 man 7 socket 可以看到相应的相关信息，其中有一段如下信息...(socket.SOL_SOCKET,socket.SO_RCVBUF) Out[4]: 87380 In [5]: s.getsockopt(socket.SOL_SOCKET,socket.SO_SNDBUF... %s" %old_state sock.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1) new_state = sock.getsockopt
(s, SOL_SOCKET, SO_KEEPALIVE, &optval, &optlen) < 0) { perror("getsockopt()"); close(...EXIT_FAILURE); } // printf("SO_KEEPALIVE set on socket\n"); /* Check the status again */ if (getsockopt...(s, SOL_SOCKET, SO_KEEPALIVE, &optval, &optlen) < 0) { perror("getsockopt()"); close(..."ON" : "OFF")); if (getsockopt(s, IPPROTO_TCP, TCP_KEEPCNT, &optval, &optlen) < 0) { perror...setsockopt()"); exit(EXIT_FAILURE); } printf("default TCP_KEEPCNT val %d\n", optval); if (getsockopt
= tcp_getsockopt, .keepalive = tcp_set_keepalive, .recvmsg = tcp_recvmsg, .sendmsg...= compat_tcp_getsockopt, #endif .diag_destroy = tcp_abort, }; EXPORT_SYMBOL(tcp_prot); 4....= ip_getsockopt, .addr2sockaddr = inet_csk_addr2sockaddr, .sockaddr_len = sizeof(struct...sockaddr_in), #ifdef CONFIG_COMPAT .compat_setsockopt = compat_ip_setsockopt, .compat_getsockopt...= compat_ip_getsockopt, #endif .mtu_reduced = tcp_v4_mtu_reduced, }; EXPORT_SYMBOL(ipv4_specific
for (i = 0; i < nevents; i++) { if (events[i].data.fd == fd) { if (getsockopt...SO_ERROR, (void *) &status, &slen) < 0) { perror("getsockopt...2，非阻塞的connect成功返回后，用getsockopt获得的SO_ERROR码还会使EINPROGRESS吗？ 不会。...此时如果getsockopt获取到的SO_ERROR 状态码是status表明connect已失败，不可能再是EINPROGRESS。
return -1; } if (FD_ISSET(iSocket, &rset)) { int err = -1; socklen_t len = sizeof(int); if ( getsockopt...= EINTR ){ perror("poll"); return -1; } } len = sizeof(ret); if ( getsockopt (iSocket, SOL_SOCKET..., SO_ERROR, &ret, &len) == -1 ) { perror("getsockopt"); return -1; } if(ret !
-1; } if (FD_ISSET(iSocket, &rset)) { int err = -1; socklen_t len = sizeof(int); if ( getsockopt...= EINTR ){ perror("poll"); return -1; } } len = sizeof(ret); if ( getsockopt (iSocket, SOL_SOCKET..., SO_ERROR, &ret, &len) == -1 ) { perror("getsockopt"); return -1; } if(ret !
192.168.100.103] 2016/03/18 22:00:36 [INFO] agent: (LAN) joined: 0 Err: dial tcp 192.168.100.103:8301: getsockopt...[ERR] agent: coordinate update error: rpc error: failed to get conn: dial tcp 192.168.100.104:8300: getsockopt...] agent: failed to sync remote state: rpc error: failed to get conn: dial tcp 192.168.100.104:8300: getsockopt
选项影响套接字操作，如 封包路由，OOB数据传输，获取和设置套接字选项分别是 getsockopt setsockopt 用法如下： int getsockopt（SOCKET s,int level
sa_family=AF_INET, sin_port=htons(31292), sin_addr=inet_addr("172.19.198.51")}, [549755813904]) = 0 getsockopt...(4, SOL_SOCKET, SO_SNDBUF, [8458000068614604252], [4]) = 0 getsockopt(4, SOL_SOCKET, SO_RCVBUF, [8458000068614641056...) = 0x2b3e1ce2e000 poll([{fd=4, events=POLLOUT}], 1, 60000) = 1 ([{fd=4, revents=POLLERR|POLLHUP}]) getsockopt...4, SOL_SOCKET, SO_ERROR, [519270883345301617], [4]) = 0 close(4) = 0 getsockopt...(4, SOL_SOCKET, SO_SNDBUF, 0x7fff4451cd1c, 0x7fff4451cd18) = -1 EBADF (Bad file descriptor) getsockopt
After select(2) indicates writability, use getsockopt(2) to read the SO_ERROR option at level SOL_SOCKET...客户端与服务端建立完整地连接，在等待的过程中，如果非阻塞connect建立成功了，客户端的sock_fd就会变成可写的（这个在本人的IO复用文章中介绍过，见下图） ④当非阻塞connect建立成功之后还可以利用getsockopt...移植性问题如下： 1.首先，非阻塞的socket可能导致connect始终失败 2.其次，select对处于EINPROGRESS状态下的socket可能不起作用 3.最后，对于出错的socket，getsockopt...} int error=0; socklen_t length=sizeof(error); //get error and save to error if(getsockopt...(sock_fd,SOL_SOCKET,SO_ERROR,&error,&length)==-1){ perror("getsockopt"); exit(EXIT_FAILURE
list Error: client: etcd cluster is unavailable or misconfigured; error #0: dial tcp 127.0.0.1:2379: getsockopt...: connection refused ; error #1: dial tcp 127.0.0.1:4001: getsockopt: connection refused error #0: dial...tcp 127.0.0.1:2379: getsockopt: connection refused error #1: dial tcp 127.0.0.1:4001: getsockopt: connection...client: endpoint http://30.1.3.42:2379 exceeded header timeout ; error #1: dial tcp 30.1.3.43:2379: getsockopt...: client: endpoint http://30.1.3.42:2379 exceeded header timeout error #1: dial tcp 30.1.3.43:2379: getsockopt
INCLUDE_UN_COMP_SHOW，然后使用Socket API即可：socket()、bind()、listen()、accept()、connect()、read()、write()、send()、recv()，以及getsockopt...的基础上增加了一个flag: MSG_EXP，类似于Message Queue里的MSG_PRI_URGENT recv()就是在read()的基础上增加了两个flag: MSG_PEEK和MSG_DONTWAIT getsockopt
argument) Many other constants may be defined; these may be used in calls to the setsockopt() and getsockopt...) -- return local address >>> print s.getpeername() 刚返回的是百度的 ('61.135.169.125', 80) | getsockopt...| | getsockopt(self, *args) | getsockopt(level, option[, buffersize]) -> value
套接字选项相关函数： #include int getsockopt(int sock, int level, int optname, void *optval, socklen_t
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