}
/*
- * send out a buffer, resend on short writes
+ * Send out a buffer, resend on short writes.
*
- * \param fd the file descriptor
- * \param buf The buffer to be sent
- * \param len The length of \a buf
- *
- * Due to circumstances beyond your control, the kernel might not send all the
- * data out in one chunk, and now, my friend, it's up to us to get the data out
- * there (Beej's Guide to Network Programming).
+ * \param fd The file descriptor.
+ * \param buf The buffer to be sent.
+ * \param len The length of \a buf.
*
- * \return This function returns 1 on success and \a -E_SEND on errors. The
- * number of bytes actually sent is stored upon successful return in \a len.
+ * \return Standard. In any case, the number of bytes actually sent is stored
+ * in \a len.
*/
static int sendall(int fd, const char *buf, size_t *len)
{
- size_t total = 0, bytesleft = *len; /* how many we have left to send */
- int n = -1;
-
- while (total < *len) {
- n = send(fd, buf + total, bytesleft, 0);
- if (n == -1)
- break;
- total += n;
- bytesleft -= n;
- if (total < *len)
- PARA_DEBUG_LOG("short write (%zd byte(s) left)\n",
- *len - total);
+ size_t total = *len;
+
+ assert(total);
+ *len = 0;
+ while (*len < total) {
+ int ret = send(fd, buf + *len, total - *len, 0);
+ if (ret == -1)
+ return -ERRNO_TO_PARA_ERROR(errno);
+ *len += ret;
}
- *len = total; /* return number actually sent here */
- return n == -1? -E_SEND : 1; /* return 1 on success */
+ return 1;
}
/**
* out the buffer, encrypted or not, and try to resend the remaing part in case
* of short writes.
*
- * \return Positive on success, \p -E_SEND on errors.
+ * \return Standard.
*/
int send_bin_buffer(int fd, const char *buf, size_t len)
{
}
/**
- * encrypt and send null terminated buffer.
+ * Encrypt and send null terminated buffer.
*
- * \param fd the file descriptor
- * \param buf the null-terminated buffer to be send
+ * \param fd The file descriptor.
+ * \param buf The null-terminated buffer to be send.
*
* This is equivalent to send_bin_buffer(fd, buf, strlen(buf)).
*
- * \return Positive on success, \p -E_SEND on errors.
+ * \return Standard.
*/
int send_buffer(int fd, const char *buf)
{
/**
- * send and encrypt a buffer given by a format string
+ * Send and encrypt a buffer given by a format string.
*
- * \param fd the file descriptor
- * \param fmt a format string
+ * \param fd The file descriptor.
+ * \param fmt A format string.
*
- * \return Positive on success, \p -E_SEND on errors.
+ * \return Standard.
*/
__printf_2_3 int send_va_buffer(int fd, const char *fmt, ...)
{
* \param buf the buffer to write the decrypted data to
* \param size the size of \a buf
*
- * Receive at most \a size bytes from filedescriptor fd. If encryption is
+ * Receive at most \a size bytes from file descriptor \a fd. If encryption is
* available, decrypt the received buffer.
*
- * \return The number of bytes received on success. On receive errors, -E_RECV
- * is returned. On crypt errors, the corresponding crypt error number is
- * returned.
+ * \return The number of bytes received on success, negative on errors.
*
* \sa recv(2)
*/
{
int n;
- if (!size)
- return -E_RECV;
+ assert(size);
n = recv_bin_buffer(fd, buf, size - 1);
if (n >= 0)
buf[n] = '\0';