/*% performs I/O for the context ctx. */
lwres_result_t
lwres_context_sendrecv(lwres_context_t *ctx,
void *sendbase, int sendlen,
void *recvbase, int recvlen,
int *recvd_len)
{
lwres_result_t result;
int ret2;
fd_set readfds;
struct timeval timeout;
/*
* Type of tv_sec is 32 bits long.
*/
if (ctx->timeout <= 0x7FFFFFFFU)
timeout.tv_sec = (int)ctx->timeout;
else
timeout.tv_sec = 0x7FFFFFFF;
timeout.tv_usec = 0;
result = lwres_context_send(ctx, sendbase, sendlen);
if (result != LWRES_R_SUCCESS)
return (result);
/*
* If this is not checked, select() can overflow,
* causing corruption elsewhere.
*/
if (ctx->sock >= (int)FD_SETSIZE) {
close(ctx->sock);
ctx->sock = -1;
return (LWRES_R_IOERROR);
}
again:
FD_ZERO(&readfds);
FD_SET(ctx->sock, &readfds);
ret2 = select(ctx->sock + 1, &readfds, NULL, NULL, &timeout);
/*
* What happened with select?
*/
if (ret2 < 0)
return (LWRES_R_IOERROR);
if (ret2 == 0)
return (LWRES_R_TIMEOUT);
result = lwres_context_recv(ctx, recvbase, recvlen, recvd_len);
if (result == LWRES_R_RETRY)
goto again;
return (result);
}
int
lwres_getrrsetbyname_xmit(lwres_context_t *ctx,
struct lwres_async_state *las)
{
lwres_result_t lwresult;
if(!las->inqueue) {
las->next = ctx->pending;
ctx->pending = las;
las->inqueue = 1;
}
lwresult = lwres_context_send(ctx, las->b_out.base, las->b_out.length);
return(lwresult_to_result(lwresult));
}
/*% performs I/O for the context ctx. */
lwres_result_t
lwres_context_sendrecv(lwres_context_t *ctx,
void *sendbase, int sendlen,
void *recvbase, int recvlen,
int *recvd_len)
{
lwres_result_t result;
int ret2;
fd_set readfds;
struct timeval timeout;
/*
* Type of tv_sec is at least 32 bits long.
*/
if (ctx->timeout <= 0x7FFFFFFFU)
timeout.tv_sec = ctx->timeout;
else
timeout.tv_sec = 0x7FFFFFFF;
timeout.tv_usec = 0;
result = lwres_context_send(ctx, sendbase, sendlen);
if (result != LWRES_R_SUCCESS)
return (result);
again:
FD_ZERO(&readfds);
FD_SET(ctx->sock, &readfds);
ret2 = select(ctx->sock + 1, &readfds, NULL, NULL, &timeout);
/*
* What happened with select?
*/
if (ret2 < 0)
return (LWRES_R_IOERROR);
if (ret2 == 0)
return (LWRES_R_TIMEOUT);
result = lwres_context_recv(ctx, recvbase, recvlen, recvd_len);
if (result == LWRES_R_RETRY)
goto again;
return (result);
}
