int cw_format_item(char *dst,mbag_item_t * item) { *dst=0; if (item->type==MBAG_BSTR16){ strncpy(dst,(char*)bstr16_data(item->data),bstr16_len(item->data)); *(dst+bstr16_len(item->data))=0; return bstr16_len(item->data); } return 0; }
static int to_str(void *item,char *dst) { mbag_item_t *i= item; char *d = dst; int utf8 = format_is_utf8(bstr16_data(i->data), bstr16_len(i->data)); if (utf8) { d += sprintf(d, "%.*s", bstr16_len(i->data), bstr16_data(i->data)); } else { d += sprintf(d, ".x"); d += format_hex(d, bstr16_data(i->data), bstr16_len(i->data)); } return d-dst; }
/** * Establish a DTLS connection using gnutls library * @see #dtls_connec */ int dtls_gnutls_connect(struct conn *conn) { int rc; char sock_buf[SOCK_ADDR_BUFSIZE]; struct dtls_gnutls_data *d; gnutls_datum_t key; d = dtls_gnutls_data_create(conn, GNUTLS_CLIENT | GNUTLS_DATAGRAM | GNUTLS_NONBLOCK); if (!d) return 0; /*// gnutls_dh_set_prime_bits(d->session, 512);*/ /*#if GNUTLS_VERSION_NUMBER >= 0x030100 gnutls_handshake_set_timeout(d->session, GNUTLS_DEFAULT_HANDSHAKE_TIMEOUT); gnutls_dtls_set_data_mtu(d->session, 1500); #endif gnutls_dtls_set_mtu(d->session, 1500); */ /* if (conn->dtls_psk != NULL){ key.data=(unsigned char*)conn->dtls_psk; key.size=strlen(conn->dtls_psk); rc = gnutls_credentials_set(d->session, GNUTLS_CRD_PSK, &key); if (rc<0) { cw_log(LOG_ERR, "DTLS - Can't set x.509 credentials: %s", gnutls_strerror(rc)); dtls_gnutls_data_destroy(d); return 0; } } */ if (conn->dtls_psk_enable){ gnutls_psk_client_credentials_t cred; rc = gnutls_psk_allocate_client_credentials(&cred); if (rc != 0) { cw_dbg(DBG_DTLS,"gnutls_psk_allocate_client_credentials() failed.\n"); return 0; } key.size = bstr16_len(conn->dtls_psk); key.data = bstr16_data(conn->dtls_psk); /* Put the username and key into the structure we use to tell GnuTLs what // the credentials are. The example server doesn't care about usernames, so // we use "Alice" here.*/ rc = gnutls_psk_set_client_credentials(cred, "Alice", &key, GNUTLS_PSK_KEY_RAW); rc = gnutls_credentials_set(d->session, GNUTLS_CRD_PSK, cred); if (rc != 0) { cw_log(LOG_ERR,"gnutls_credentials_set() failed."); } } cw_dbg(DBG_DTLS,"Starting handshake"); do { rc = gnutls_handshake(d->session); } while (rc == GNUTLS_E_AGAIN); if (rc < 0) { cw_log(LOG_ERR, "DTLS (gnutls) Can't connect to %s: %s", sock_addr2str(&conn->addr,sock_buf), gnutls_strerror(rc)); return 0; } cw_dbg(DBG_DTLS, "Handshake with %s successful", sock_addr2str(&conn->addr,sock_buf)); conn->dtls_data = d; conn->read = dtls_gnutls_read; conn->write = dtls_gnutls_write; return 1; }
int put(struct mbag_item *i, uint8_t *dst) { int l = bstr16_len(i->data); memcpy(dst,bstr16_data(i->data),l); return l; }