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openssl: set up hooks with to perform NPN 

NPN is what is available in the wild today to negotiate SPDY or HTTP/2.0
connections. It is expected to be replaced by ALPN in the future. If
HTTP/2.0 is negotiated, this is indicated for the entire connection and
http.c is expected to initialize itself for HTTP/2.0 instead of
HTTP/1.1.

see:
http://technotes.googlecode.com/git/nextprotoneg.html
http://tools.ietf.org/html/draft-ietf-tls-applayerprotoneg-04
This commit is contained in:
Fabian Frank 2014-01-29 21:18:03 -08:00 committed by Daniel Stenberg
parent c3fe3d9926
commit 22c198fa89
2 changed files with 43 additions and 0 deletions
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8
lib/urldata.h
View File

@ -597,6 +597,12 @@ enum upgrade101 {
UPGR101_WORKING /* talking upgraded protocol */
};
enum negotiatenpn {
NPN_INIT, /* default state */
NPN_HTTP1_1, /* HTTP/1.1 negotiated */
NPN_HTTP2_DRAFT09 /* HTTP-draft-0.9/2.0 negotiated */
};
/*
* Request specific data in the easy handle (SessionHandle). Previously,
* these members were on the connectdata struct but since a conn struct may
@ -1048,6 +1054,8 @@ struct connectdata {
TUNNEL_COMPLETE /* CONNECT response received completely */
} tunnel_state[2]; /* two separate ones to allow FTP */
struct connectbundle *bundle; /* The bundle we are member of */
enum negotiatenpn negnpn;
};
/* The end of connectdata. */

35
lib/vtls/openssl.c
View File

@ -1399,6 +1399,37 @@ static void ssl_tls_trace(int direction, int ssl_ver, int content_type,
# define use_sni(x) Curl_nop_stmt
#endif
#ifdef USE_NGHTTP2
/*
* in is a list of lenght prefixed strings. this function has to select
* the protocol we want to use from the list and write its string into out.
*/
static int
select_next_proto_cb(SSL *ssl,
unsigned char **out, unsigned char *outlen,
const unsigned char *in, unsigned int inlen,
void *arg)
{
struct connectdata *conn = (struct connectdata*) arg;
int retval = nghttp2_select_next_protocol(out, outlen, in, inlen);
(void)ssl;
if(retval == 1) {
infof(conn->data, "NPN, negotiated HTTP2\n");
conn->negnpn = NPN_HTTP2_DRAFT09;
}
else if(retval == 0) {
infof(conn->data, "NPN, negotiated HTTP1.1\n");
conn->negnpn = NPN_HTTP1_1;
}
else {
infof(conn->data, "NPN, no overlap, negotiated nothing\n");
}
return SSL_TLSEXT_ERR_OK;
}
#endif
static CURLcode
ossl_connect_step1(struct connectdata *conn,
int sockindex)
@ -1617,6 +1648,10 @@ ossl_connect_step1(struct connectdata *conn,
SSL_CTX_set_options(connssl->ctx, ctx_options);
#ifdef USE_NGHTTP2
SSL_CTX_set_next_proto_select_cb(connssl->ctx, select_next_proto_cb, conn);
#endif
if(data->set.str[STRING_CERT] || data->set.str[STRING_CERT_TYPE]) {
if(!cert_stuff(conn,
connssl->ctx,