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Common bio functions for openssl and gnutls

FossilOrigin-Name: a9deeccfbf93e8e82afe15621ea8df4aeceb7d8a03f0756c897d4fe09d40b572
This commit is contained in:
7u83@mail.ru 2015-02-07 01:59:05 +00:00
parent 2140afd838
commit 9c3cb27bd2
1 changed files with 69 additions and 0 deletions
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src/capwap/dtls_bio.c Normal file
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/*
This file is part of libcapwap.
libcapwap is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
libcapwap is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Foobar. If not, see <http://www.gnu.org/licenses/>.
*/
#include <arpa/inet.h>
#include "cw_log.h"
#include "dtls.h"
int dtls_bio_read(struct conn *conn, char *out, int maxlen)
{
if (conn->dtls_buffer_len == 0) {
int len = conn->recv_packet(conn, conn->dtls_buffer, 2048);
if (len < 4)
return 0;
conn->dtls_buffer_len = len - 4;
conn->dtls_buffer_pos = 4;
}
if (conn->dtls_buffer_len > maxlen) {
memcpy(out, conn->dtls_buffer + conn->dtls_buffer_pos, maxlen);
conn->dtls_buffer_len -= maxlen;
conn->dtls_buffer_pos += maxlen;
cw_dbg(DBG_DTLS_BIO, "SSL BIO read: (maxlen = %d), remain %d", maxlen,conn->dtls_buffer_len);
cw_dbg_dmp(DBG_DTLS_BIO_DMP,(uint8_t*)out,maxlen,"Dump...");
return maxlen;
}
memcpy(out, conn->dtls_buffer + conn->dtls_buffer_pos, conn->dtls_buffer_len);
int ret = conn->dtls_buffer_len;
conn->dtls_buffer_len = 0;
cw_dbg(DBG_DTLS_BIO, "SSL BIO read: (maxlen = %d), remain %d", ret,conn->dtls_buffer_len);
cw_dbg_dmp(DBG_DTLS_BIO_DMP,(uint8_t*)out,ret,"Dump...");
return ret;
}
int dtls_bio_write(struct conn * conn, const char *data, int len)
{
uint8_t buffer[2048];
*((uint32_t *) buffer) = htonl(1 << 24);
memcpy(buffer + 4, data, len);
int rc = conn->send_packet(conn, buffer, len + 4);
cw_dbg(DBG_DTLS_BIO, "SSL BIO write: %d bytes, rc=%d, ptr: %p", len, rc, data);
cw_dbg_dmp(DBG_DTLS_BIO_DMP,(uint8_t*)data,len,"Dump ...");
if (rc < 0)
return rc;
return rc - 4;
}