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/* ISC license. */
#include <string.h>
#include <skalibs/allreadwrite.h>
#include <skalibs/tai.h>
#include <skalibs/stralloc.h>
#include <skalibs/genalloc.h>
#include <skalibs/socket.h>
#include <skalibs/ip46.h>
#include "shibari-cache-internal.h"
void udpqueue_drop (udpqueue *q)
{
q->storage.len = 0 ;
q->messages.len = 0 ;
tain_add_g(&q->deadline, &tain_infinite_relative) ;
}
int udpqueue_add (udpqueue *q, uint8_t source, char const *ip, uint16_t port, char const *s, uint16_t len)
{
size_t iplen = source ? 16 : 4 ;
udpaux msg = { .port = port, .len = len } ;
if (!stralloc_readyplus(&q->storage, iplen + len)) return 0 ;
if (!genalloc_append(udpaux, &q->messages, &msg)) return 0 ;
if (!q->storage.len) tain_add_g(&q->deadline, &g->wtto) ;
stralloc_catb(&q->storage, ip, iplen) ;
stralloc_catb(&q->storage, s, len) ;
return 1 ;
}
int udpqueue_flush (udpqueue *q, uint8_t is6)
{
size_t n = genalloc_len(udpaux, &q->messages) ;
size_t shead = 0, head = 0 ;
ssize_t r = 1 ;
while (head < n)
{
udpaux const *msg = genalloc_s(udpaux, &q->messages) + head ;
ssize_t r ;
#if SKALIBS_IPV6_ENABLED
if (is6)
r = socket_send6(q->fd, q->storage.s + shead + 16, msg->len, q->storage.s + shead, msg->port) ;
else
#endif
r = socket_send4(q->fd, q->storage.s + shead + 4, msg->len, q->storage.s + shead, msg->port) ;
if (r <= 0) goto adjust ;
shead += (is6 ? 16 : 4) + msg->len ;
}
udpqueue_drop(q) ;
return 1 ;
adjust:
memmove(q->storage.s, q->storage.s + shead, q->storage.len - shead) ;
q->storage.len -= shead ;
memmove(genalloc_s(udpaux, &q->messages), genalloc_s(udpaux, &q->messages) + head, (n - head) * sizeof(udpaux)) ;
genalloc_setlen(udpaux, &q->messages, n - head) ;
if (shead) tain_add_g(&q->deadline, &g->wtto) ;
return sanitize_read(r) ;
}
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