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/* Exercise production Echo-Reply handling at the negotiated MTU. */
#include <assert.h>
#include "triton.h"
#undef DEFINE_INIT
#define DEFINE_INIT(o, f)
#include "../../accel-pppd/ppp/ppp_lcp.c"
int conf_ppp_verbose;
static int sent, sent_len;
void log_ppp_debug(const char *fmt, ...) {}
int ppp_chan_send(struct ppp_t *ppp, void *buf, int size)
{
const struct lcp_hdr_t *hdr = buf;
assert(size == ntohs(hdr->len) + 2);
assert(hdr->code == ECHOREP);
sent++;
sent_len = size;
return 0;
}
int main(void)
{
unsigned char buf[1502] = {0};
struct ppp_t ppp = {.buf = buf, .buf_size = sizeof(buf), .mtu = 1492};
struct ppp_lcp_t lcp = {.ppp = &ppp, .magic = 0x12345678};
struct lcp_hdr_t *hdr = (void *)buf;
hdr->len = htons(1493);
hdr->code = ECHOREQ;
send_echo_reply(&lcp);
assert(!sent && hdr->code == ECHOREQ);
hdr->len = htons(1492);
send_echo_reply(&lcp);
assert(sent == 1 && sent_len == 1494);
assert(u_read_be32(hdr + 1) == lcp.magic);
hdr->len = htons(8);
send_echo_reply(&lcp);
assert(sent == 2 && sent_len == 10);
puts("LCP safeguards: PASS");
return 0;
}
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