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prop224: Parse RENDEZVOUS2 cell

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Signed-off-by: David Goulet <dgoulet@torproject.org>
This commit is contained in:
David Goulet
2017-07-23 13:01:00 -04:00
parent 2f1b3d647f
commit ee15c16742
1 changed files with 32 additions and 0 deletions
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src/or/hs_cell.c
+32
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@@ -899,3 +899,35 @@ hs_cell_parse_introduce_ack(const uint8_t *payload, size_t payload_len)
return ret;
}
/* Handle a RENDEZVOUS2 cell encoded in payload of length payload_len. On
* success, handshake_info contains the data in the HANDSHAKE_INFO field, and
* 0 is returned. On error, a negative value is returned. */
int
hs_cell_parse_rendezvous2(const uint8_t *payload, size_t payload_len,
uint8_t *handshake_info, size_t handshake_info_len)
{
int ret = -1;
trn_cell_rendezvous2_t *cell = NULL;
tor_assert(payload);
tor_assert(handshake_info);
if (trn_cell_rendezvous2_parse(&cell, payload, payload_len) < 0) {
log_info(LD_REND, "Invalid RENDEZVOUS2 cell. Unable to parse it.");
goto end;
}
/* Static size, we should never have an issue with this else we messed up
* our code flow. */
tor_assert(trn_cell_rendezvous2_getlen_handshake_info(cell) ==
handshake_info_len);
memcpy(handshake_info,
trn_cell_rendezvous2_getconstarray_handshake_info(cell),
handshake_info_len);
ret = 0;
end:
trn_cell_rendezvous2_free(cell);
return ret;
}