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/* 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);
(void) buf;
(void) n;
(void) flags;
}
void
liberror_send_short(int fd, const void *buf, size_t n, int flags, size_t min, size_t max, ssize_t returned, const char *fname)
{
const char *desc;
struct liberror_error *error;
int saved_errno = errno;
liberror_save_backtrace(NULL);
if (returned < 0 || (size_t)returned < min) {
desc = "Sent message was shorter than expected";
} else if ((size_t)returned > max) {
desc = "Sent message was larger than expected";
} else {
desc = "Sent message was of an unexpected size";
}
liberror_set_error(desc, "send", "liberror-libc", LIBERROR_LIBC_ERRROR_SHORT_WRITE);
error = liberror_get_error();
error->details_type = LIBERROR_DETAILS_ONE_FILE;
error->details.one_file.fd = fd;
error->details.one_file.name = fname ? strdup(fname) : NULL;
error->details.one_file.role = "Socket file";
errno = saved_errno;
(void) buf;
(void) n;
(void) flags;
}
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;
}
ssize_t
liberror_send_require(int fd, const void *buf, size_t n, int flags, size_t min, size_t max, const char *fname)
{
ssize_t r = send(fd, buf, n, flags);
if (r >= 0 && (size_t)r >= min && (size_t)r <= max)
return r;
liberror_save_backtrace(NULL);
if (r < 0)
liberror_send_failed(fd, buf, n, flags, fname);
else
liberror_send_short(fd, buf, n, flags, min, max, r, fname);
return -1;
}
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