TCP/IP 错误号
下表列出了 Linux， UNIX 系统上的常见 TCP/IP 错误符号 (errnos)。
Linux 操作系统，可在 /usr/include/asm/errno.h ，或/usr/include/asm-generic/errno-base.h文件中找到 TCP/IP 错误的完整列表。
| 错误代码 |
Linux 错误号 |
描述 |
|---|---|---|
| EINTR | 4 | 指定的函数被信号中断。 |
| EBADF | 9 | 套接字错误。 套接字可能已损坏。 |
| EAGAIN | 11 | 资源暂时不可用。 |
| EFAULT | 14 | 地址错误。 在连接时，使用了错误地址。 在接收时，数据被定向到不存在的或受保护的进程地址空间部分。 缓冲区无效。 |
| EBUSY | 16 | 资源正忙。 |
| EINVAL | 22 | 传递至指定函数或套接字的无效自变量已关闭。 如果存在内存覆盖或缓存溢出问题，那么可能返回 EINVAL 错误。 |
| ENFILE | 23 | 系统中打开的文件太多。 |
| EMFILE | 24 | 每进程文件描述符表已满。 已超出进程的文件描述符/套接字数。 |
| ENOSPC | 28 | 设备或系统表上未余下任何空间。 |
| EPIPE | 32 | 管道中断。 |
| EWOULDBLOCK | 11 | 在连接函数上，分配给 TCP/UDP 临时端口的范围已用完。 （某些操作系统将同一错误返回为 EAGAIN。） |
| ENOTSOCK | 88 | 对非套接字执行了套接字操作。 |
| ENOPROTOOPT | 92 | 选项未知。 |
| EADDRINUSE | 98 | 已经在使用指定的地址。 建立该连接的先前进程可能异常终止或未正确清除。 |
| EADDRNOTAVAIL | 99 | 不能从本地系统获取指定的主机名或 IP 地址。 |
| ENETDOWN | 100 | 网络已停止。 |
| ENETUNREACH | 101 | 没有任何至网络或主机的路由可用。 |
| ENETRESET | 102 | 网络在重置时删除了该连接。 |
| ECONNRESET | 104 | 合作伙伴已重置连接。 |
| ENOBUFS | 105 | 系统中没有足够的内存或资源可用来完成调用。 |
| EISCONN | 106 | 已连接该套接字。 |
| ENOTCONN | 107 | 未连接套接字。 |
| ETIMEDOUT | 110 | 连接已超时。 |
| ECONNREFUSED | 111 | 连接被拒绝。 如果您尝试连接至数据库，请检查服务器上的数据库管理器和 TCP/IP 协议支持是否已成功启动。 如果指定了 SOCKS 协议支持，那么还必须确保 SOCKS 服务器上的 TCP/IP 协议支持已成功启动。 |
| EHOSTDOWN | 112 | 主机已当机。 |
| EHOSTUNREACH | 113 | 没有任何至主机的可用路由。 |
#include
#define EDEADLK 35 /* Resource deadlock would occur */
#define ENAMETOOLONG 36 /* File name too long */
#define ENOLCK 37 /* No record locks available */
/*
* This error code is special: arch syscall entry code will return
* -ENOSYS if users try to call a syscall that doesn't exist. To keep
* failures of syscalls that really do exist distinguishable from
* failures due to attempts to use a nonexistent syscall, syscall
* implementations should refrain from returning -ENOSYS.
*/
#define ENOSYS 38 /* Invalid system call number */
#define ENOTEMPTY 39 /* Directory not empty */
#define ELOOP 40 /* Too many symbolic links encountered */
#define EWOULDBLOCK EAGAIN /* Operation would block */
#define ENOMSG 42 /* No message of desired type */
#define EIDRM 43 /* Identifier removed */
#define ECHRNG 44 /* Channel number out of range */
#define EL2NSYNC 45 /* Level 2 not synchronized */
#define EL3HLT 46 /* Level 3 halted */
#define EL3RST 47 /* Level 3 reset */
#define ELNRNG 48 /* Link number out of range */
#define EUNATCH 49 /* Protocol driver not attached */
#define ENOCSI 50 /* No CSI structure available */
#define EL2HLT 51 /* Level 2 halted */
#define EBADE 52 /* Invalid exchange */
#define EBADR 53 /* Invalid request descriptor */
#define EXFULL 54 /* Exchange full */
#define ENOANO 55 /* No anode */
#define EBADRQC 56 /* Invalid request code */
#define EBADSLT 57 /* Invalid slot */
#define EDEADLOCK EDEADLK
#define EBFONT 59 /* Bad font file format */
#define ENOSTR 60 /* Device not a stream */
#define ENODATA 61 /* No data available */
#define ETIME 62 /* Timer expired */
#define ENOSR 63 /* Out of streams resources */
#define ENONET 64 /* Machine is not on the network */
#define ENOPKG 65 /* Package not installed */
#define EREMOTE 66 /* Object is remote */
#define ENOLINK 67 /* Link has been severed */
#define EADV 68 /* Advertise error */
#define ESRMNT 69 /* Srmount error */
#define ECOMM 70 /* Communication error on send */
#define EPROTO 71 /* Protocol error */
#define EMULTIHOP 72 /* Multihop attempted */
#define EDOTDOT 73 /* RFS specific error */
#define EBADMSG 74 /* Not a data message */
#define EOVERFLOW 75 /* Value too large for defined data type */
#define ENOTUNIQ 76 /* Name not unique on network */
#define EBADFD 77 /* File descriptor in bad state */
#define EREMCHG 78 /* Remote address changed */
#define ELIBACC 79 /* Can not access a needed shared library */
#define ELIBBAD 80 /* Accessing a corrupted shared library */
#define ELIBSCN 81 /* .lib section in a.out corrupted */
#define ELIBMAX 82 /* Attempting to link in too many shared libraries */
#define ELIBEXEC 83 /* Cannot exec a shared library directly */
#define EILSEQ 84 /* Illegal byte sequence */
#define ERESTART 85 /* Interrupted system call should be restarted */
#define ESTRPIPE 86 /* Streams pipe error */
#define EUSERS 87 /* Too many users */
#define ENOTSOCK 88 /* Socket operation on non-socket */
#define EDESTADDRREQ 89 /* Destination address required */
#define EMSGSIZE 90 /* Message too long */
#define EPROTOTYPE 91 /* Protocol wrong type for socket */
#define ENOPROTOOPT 92 /* Protocol not available */
#define EPROTONOSUPPORT 93 /* Protocol not supported */
#define ESOCKTNOSUPPORT 94 /* Socket type not supported */
#define EOPNOTSUPP 95 /* Operation not supported on transport endpoint */
#define EPFNOSUPPORT 96 /* Protocol family not supported */
#define EAFNOSUPPORT 97 /* Address family not supported by protocol */
#define EADDRINUSE 98 /* Address already in use */
#define EADDRNOTAVAIL 99 /* Cannot assign requested address */
#define ENETDOWN 100 /* Network is down */
#define ENETUNREACH 101 /* Network is unreachable */
#define ENETRESET 102 /* Network dropped connection because of reset */
#define ECONNABORTED 103 /* Software caused connection abort */
#define ECONNRESET 104 /* Connection reset by peer */
#define ENOBUFS 105 /* No buffer space available */
#define EISCONN 106 /* Transport endpoint is already connected */
#define ENOTCONN 107 /* Transport endpoint is not connected */
#define ESHUTDOWN 108 /* Cannot send after transport endpoint shutdown */
#define ETOOMANYREFS 109 /* Too many references: cannot splice */
#define ETIMEDOUT 110 /* Connection timed out */
#define ECONNREFUSED 111 /* Connection refused */
#define EHOSTDOWN 112 /* Host is down */
#define EHOSTUNREACH 113 /* No route to host */
#define EALREADY 114 /* Operation already in progress */
#define EINPROGRESS 115 /* Operation now in progress */
#define ESTALE 116 /* Stale file handle */
#define EUCLEAN 117 /* Structure needs cleaning */
#define ENOTNAM 118 /* Not a XENIX named type file */
#define ENAVAIL 119 /* No XENIX semaphores available */
#define EISNAM 120 /* Is a named type file */
#define EREMOTEIO 121 /* Remote I/O error */
#define EDQUOT 122 /* Quota exceeded */
#define ENOMEDIUM 123 /* No medium found */
#define EMEDIUMTYPE 124 /* Wrong medium type */
#define ECANCELED 125 /* Operation Canceled */
#define ENOKEY 126 /* Required key not available */
#define EKEYEXPIRED 127 /* Key has expired */
#define EKEYREVOKED 128 /* Key has been revoked */
#define EKEYREJECTED 129 /* Key was rejected by service */
/* for robust mutexes */
#define EOWNERDEAD 130 /* Owner died */
#define ENOTRECOVERABLE 131 /* State not recoverable */
#define ERFKILL 132 /* Operation not possible due to RF-kill */
#define EHWPOISON 133 /* Memory page has hardware error */
#endif