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MINOR: accept-proxy: support proxy protocol v2 CRC32c checksum

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When proxy protocol v2 CRC32c tlv is received, check it before accept
connection (as describe in "doc/proxy-protocol.txt").
This commit is contained in:
Emmanuel Hocdet 2018-02-05 16:23:23 +01:00 committed by Willy Tarreau
parent 4399c75f6c
commit 115df3e38e
1 changed files with 8 additions and 0 deletions
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8
src/connection.c
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@ -613,6 +613,14 @@ int conn_recv_proxy(struct connection *conn, int flag)
tlv_offset += tlv_len + TLV_HEADER_SIZE;
switch (tlv_packet->type) {
case PP2_TYPE_CRC32C: {
void *tlv_crc32c_p = (void *)tlv_packet->value;
uint32_t n_crc32c = ntohl(read_u32(tlv_crc32c_p));
write_u32(tlv_crc32c_p, 0);
if (hash_crc32c(trash.str, PP2_HEADER_LEN + ntohs(hdr_v2->len)) != n_crc32c)
goto bad_header;
break;
}
#ifdef CONFIG_HAP_NS
case PP2_TYPE_NETNS: {
const struct netns_entry *ns;