diff options
Diffstat (limited to 'send.c')
| -rw-r--r-- | send.c | 157 |
1 files changed, 157 insertions, 0 deletions
@@ -0,0 +1,157 @@ +/* See LICENSE file for copyright and license details. */ +#include "internal.h" + + +void +liberror_send_failed(int fd, const void *buf, size_t n, int flags, const char *fname) +{ + const char *desc; + int saved_errno, val; + struct sockaddr_storage addr; + socklen_t len = 0; + switch (errno) { + case EACCES: + desc = "The calling process does not have appropriate privileges"; + saved_errno = errno; + if (getsockopt(fd, SOL_SOCKET, SO_DOMAIN, &val, &(socklen_t){(socklen_t)sizeof(val)})) { + /* Do nothing */ + } else if (val == PF_LOCAL) { + desc = "Write or search permission to the destination socket file is denied"; + } else if (val != PF_INET && val != PF_INET6) { + /* Do nothing */ + } else if (getsockopt(fd, SOL_SOCKET, SO_TYPE, &val, &(socklen_t){(socklen_t)sizeof(val)})) { + /* Do nothing */ + } else if (val != SOCK_DGRAM) { + /* Do nothing */ + } else if (getsockopt(fd, SOL_SOCKET, SO_PROTOCOL, &val, &(socklen_t){(socklen_t)sizeof(val)})) { + /* Do nothing */ + } else if (val == IPPROTO_UDP) { + desc = "An attempt was made to send to a network/broadcast address as though it was a unicast address"; + } + errno = saved_errno; + break; +#if defined(EAGAIN) + case EAGAIN: +#endif +#if defined(EWOULDBLOCK) && (!defined(EAGAIN) || EAGAIN != EWOULDBLOCK) + case EWOULDBLOCK: +#endif +#if defined(EAGAIN) || defined(EWOULDBLOCK) + desc = "Attempting to send in nonblocking mode but the operation would block " + "or the socket is unbound and all ephemeral ports are currently in used"; +# if defined(EAGAIN) +# if defined(EWOULDBLOCK) && (EAGAIN != EWOULDBLOCK) + if (errno == EAGAIN) { +# endif + saved_errno = errno; + if (getsockopt(fd, SOL_SOCKET, SO_TYPE, &val, &(socklen_t){(socklen_t)sizeof(val)})) { + /* Do nothing */ + } else if (val != SOCK_DGRAM) { + goto first_case_in_eagain; + } else if (getsockopt(fd, SOL_SOCKET, SO_DOMAIN, &val, &(socklen_t){(socklen_t)sizeof(val)})) { + /* Do nothing */ + } else if (val != PF_INET && val != PF_INET6) { + goto first_case_in_eagain; + } else if (len = 0, getsockname(fd, (void *)&addr, &len)) { + /* Do nothing */ + } else if ((len && addr.ss_family == AF_INET && ((struct sockaddr_in *)&addr)->sin_port) || + (len && addr.ss_family == AF_INET6 && ((struct sockaddr_in6 *)&addr)->sin6_port)) { + first_case_in_eagain: + desc = "Attempting to send in nonblocking mode but the operation would block"; + } + errno = saved_errno; +# if defined(EWOULDBLOCK) && (EAGAIN != EWOULDBLOCK) + } else { + goto first_case_in_eagain: + } +# endif +# endif + break; +#endif + case EALREADY: + desc = "Another Fast Open is already in progress"; + break; + case EBADF: + if (fd < 0) + desc = "Negative file descriptor number specified"; + else + desc = "Unassigned file descriptor number specified"; + break; + case ECONNRESET: + desc = "The peer has closed the connection without reading all received messages"; + break; + case EDESTADDRREQ: + desc = "The no peer address is set"; + break; + case EFAULT: + desc = "Invalid user space address specified in the second argument"; + break; + case EINTR: + desc = "System call was interrupted by a signal or machine suspension"; + break; + case EINVAL: + if (fd < 0) + desc = "Negative file descriptor number specified"; + else + desc = "Non-existing flag is specified"; + break; + case EIO: + desc = "An I/O error occurred while reading from or writing to the file system"; + break; + case EISCONN: + desc = "The recipient is specified but the socket is already connected"; + break; + case EMSGSIZE: + desc = "Message is to large to be sent atomically as required by the socket type"; + break; + case ENETDOWN: + desc = "All local network interfaces that can be used to reach the destination are down"; + break; + case ENETUNREACH: + desc = "No route to the network it present"; + break; + case ENOBUFS: + desc = "Insufficient resource available in the system to perform the operation"; + break; + case ENOMEM: + desc = "Out of memory"; + break; + case ENOTCONN: + desc = "The socket is not connected"; + break; + case ENOTSOCK: + desc = "The file descriptor refer to a non-socket file"; + break; + case EOPNOTSUPP: + desc = "A flag that is not supported for the socket protocol is specified"; + break; + case EPIPE: + desc = "The socket is shut down for writing or is no longer connected"; + saved_errno = errno; + if (getsockopt(fd, SOL_SOCKET, SO_TYPE, &val, &(socklen_t){(socklen_t)sizeof(val)})) { + /* Do nothing */ + } else if (val == SOCK_DGRAM) { + desc = "The socket is shut down"; + } else if (getpeername(fd, (void *)&addr, &len) && errno == ENOTCONN) { + desc = "The socket is no longer connected"; + } + errno = saved_errno; + break; + default: + desc = ""; + break; + } + liberror_libc_set_error_one_file(desc, "send", "Socket file", fd, fname); +} + + +ssize_t +liberror_send(int fd, const void *buf, size_t n, int flags, const char *fname) +{ + ssize_t r = send(fd, buf, n, flags); + if (r >= 0) + return r; + liberror_save_backtrace(NULL); + liberror_send_failed(fd, buf, n, flags, fname); + return -1; +} |