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imap-send: support Server Name Indication (RFC4366)

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To talk with some sites that serve multiple names on a single IP
address, the client needs to ask for the specific host that it wants
to talk to.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Junio C Hamano 2013-02-20 16:02:42 -08:00
parent e174744ad1
commit 698a1ec4d5
1 changed files with 11 additions and 0 deletions
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11
imap-send.c
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@ -370,6 +370,17 @@ static int ssl_socket_connect(struct imap_socket *sock, int use_tls_only, int ve
return -1;
}
#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
/*
* SNI (RFC4366)
* OpenSSL does not document this function, but the implementation
* returns 1 on success, 0 on failure after calling SSLerr().
*/
ret = SSL_set_tlsext_host_name(sock->ssl, server.host);
if (ret != 1)
warning("SSL_set_tlsext_host_name(%s) failed.", server.host);
#endif
ret = SSL_connect(sock->ssl);
if (ret <= 0) {
socket_perror("SSL_connect", sock, ret);