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#include "core.h"
#include <string.h>
int ecp_rbuf_init(ECPRBuffer *rbuf, ECPRBMessage *msg, unsigned int msg_size) {
rbuf->msg = msg;
if (msg_size) {
if (msg == NULL) return ECP_ERR;
rbuf->msg_size = msg_size;
memset(rbuf->msg, 0, sizeof(ECPRBMessage) * msg_size);
} else {
rbuf->msg_size = ECP_RBUF_SEQ_HALF;
}
return ECP_OK;
}
int ecp_rbuf_msg_idx(ECPRBuffer *rbuf, ecp_seq_t seq) {
ecp_seq_t seq_offset = seq - rbuf->seq_start;
// This also checks for seq_start <= seq if seq type range >> rbuf->msg_size
if (seq_offset < rbuf->msg_size) return ECP_RBUF_IDX_MASK(rbuf->msg_start + seq_offset, rbuf->msg_size);
return ECP_ERR_RBUF_IDX;
}
ssize_t ecp_rbuf_msg_store(ECPRBuffer *rbuf, ecp_seq_t seq, int idx, unsigned char *msg, size_t msg_size, unsigned char test_flags, unsigned char set_flags) {
idx = idx < 0 ? ecp_rbuf_msg_idx(rbuf, seq) : idx;
if (idx < 0) return idx;
if (rbuf->msg == NULL) return 0;
if (test_flags && (test_flags & rbuf->msg[idx].flags)) return ECP_ERR_RBUF_FLAG;
if (!(set_flags & ECP_RBUF_FLAG_DELIVERED)) {
memcpy(rbuf->msg[idx].msg, msg, msg_size);
rbuf->msg[idx].size = msg_size;
}
rbuf->msg[idx].flags = set_flags;
return msg_size;
}
int ecp_conn_rbuf_start(ECPConnection *conn, ecp_seq_t seq) {
int rv = ecp_conn_rbuf_send_start(conn);
if (rv) return rv;
if (!conn->out) {
rv = ecp_conn_rbuf_recv_start(conn, seq);
if (rv) return rv;
}
return ECP_OK;
}
ssize_t ecp_conn_rbuf_pkt_send(ECPConnection *conn, ECPNetAddr *addr, unsigned char *packet, size_t pkt_size, ecp_seq_t seq, int idx) {
int do_send;
ECPRBSend *buf = conn->rbuf.send;
ssize_t rv = ecp_rbuf_msg_store(&buf->rbuf, seq, idx, packet, pkt_size, 0, 0);
if (rv < 0) return rv;
#ifdef ECP_WITH_PTHREAD
pthread_mutex_lock(&buf->mutex);
#endif
if (buf->in_transit < buf->win_size) {
buf->in_transit++;
do_send = 1;
}
#ifdef ECP_WITH_PTHREAD
pthread_mutex_unlock(&buf->mutex);
#endif
if (do_send) rv = ecp_pkt_send(conn->sock, addr, packet, pkt_size);
return rv;
}
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