stroke: Dynamically resize stroke messages
The maximum size of a stroke message is currently 64k due to the 2 byte length field. Fixes #943.
This commit is contained in:
Tobias Brunner
+166
-146
@@ -1,4 +1,5 @@
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/*
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* Copyright (C) 2007-2015 Tobias Brunner
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* Copyright (C) 2006 Martin Willi
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* Hochschule fuer Technik Rapperswil
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*
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@@ -31,37 +32,57 @@
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#define IPV4_LEN 4
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#define IPV6_LEN 16
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static char* push_string(stroke_msg_t *msg, char *string)
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static stroke_msg_t *create_stroke_msg(int type)
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{
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unsigned long string_start = msg->length;
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stroke_msg_t *msg;
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if (string == NULL)
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{
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return NULL;
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}
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else if ((size_t)msg->length + strlen(string) >= sizeof(stroke_msg_t))
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{
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/* set invalid length to fail during message send */
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msg->length = ~0;
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return NULL;
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}
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else
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{
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msg->length += strlen(string) + 1;
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strcpy((char*)msg + string_start, string);
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return (char*)string_start;
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}
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INIT(msg,
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.type = type,
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.length = offsetof(stroke_msg_t, buffer),
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);
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return msg;
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}
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static int send_stroke_msg (stroke_msg_t *msg)
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#define push_string(msg, field, str) \
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push_string_impl(msg, offsetof(stroke_msg_t, field), str)
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#define push_string_end(msg, offset, field, str) \
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push_string_impl(msg, offset + offsetof(stroke_end_t, field), str)
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static void push_string_impl(stroke_msg_t **msg, size_t offset, char *string)
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{
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size_t cur_len = (*msg)->length, str_len;
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if (!string)
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{
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return;
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}
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str_len = strlen(string) + 1;
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if (cur_len + str_len >= UINT16_MAX)
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{
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(*msg)->length = UINT16_MAX;
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return;
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}
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while (cur_len + str_len > sizeof(stroke_msg_t) + (*msg)->buflen)
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{
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*msg = realloc(*msg, sizeof(stroke_msg_t) + (*msg)->buflen +
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STROKE_BUF_LEN_INC);
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(*msg)->buflen += STROKE_BUF_LEN_INC;
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}
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(*msg)->length += str_len;
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strcpy((char*)*msg + cur_len, string);
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*(char**)((char*)*msg + offset) = (char*)cur_len;
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}
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static int send_stroke_msg(stroke_msg_t *msg)
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{
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stream_t *stream;
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char *uri, buffer[64];
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int count;
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if (msg->length > sizeof(stroke_msg_t))
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if (msg->length == UINT16_MAX)
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{
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DBG1(DBG_APP, "stroke message exceeds buffer size");
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DBG1(DBG_APP, "stroke message exceeds maximum buffer size");
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free(msg);
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return -1;
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}
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@@ -74,6 +95,7 @@ static int send_stroke_msg (stroke_msg_t *msg)
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if (!stream)
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{
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DBG1(DBG_APP, "failed to connect to stroke socket '%s'", uri);
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free(msg);
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return -1;
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}
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@@ -81,6 +103,7 @@ static int send_stroke_msg (stroke_msg_t *msg)
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{
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DBG1(DBG_APP, "sending stroke message failed");
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stream->destroy(stream);
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free(msg);
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return -1;
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}
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while ((count = stream->read(stream, buffer, sizeof(buffer)-1, TRUE)) > 0)
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@@ -93,6 +116,7 @@ static int send_stroke_msg (stroke_msg_t *msg)
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DBG1(DBG_APP, "reading stroke response failed");
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}
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stream->destroy(stream);
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free(msg);
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return 0;
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}
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@@ -109,33 +133,38 @@ static char* connection_name(starter_conn_t *conn)
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return conn->name;
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}
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static void starter_stroke_add_end(stroke_msg_t *msg, stroke_end_t *msg_end, starter_end_t *conn_end)
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static void add_end(stroke_msg_t **msg, size_t offset, starter_end_t *conn_end)
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{
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msg_end->auth = push_string(msg, conn_end->auth);
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msg_end->auth2 = push_string(msg, conn_end->auth2);
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msg_end->id = push_string(msg, conn_end->id);
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msg_end->id2 = push_string(msg, conn_end->id2);
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msg_end->rsakey = push_string(msg, conn_end->rsakey);
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msg_end->cert = push_string(msg, conn_end->cert);
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msg_end->cert2 = push_string(msg, conn_end->cert2);
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msg_end->cert_policy = push_string(msg, conn_end->cert_policy);
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msg_end->ca = push_string(msg, conn_end->ca);
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msg_end->ca2 = push_string(msg, conn_end->ca2);
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msg_end->groups = push_string(msg, conn_end->groups);
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msg_end->groups2 = push_string(msg, conn_end->groups2);
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msg_end->updown = push_string(msg, conn_end->updown);
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stroke_end_t *msg_end;
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push_string_end(msg, offset, auth, conn_end->auth);
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push_string_end(msg, offset, auth2, conn_end->auth2);
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push_string_end(msg, offset, id, conn_end->id);
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push_string_end(msg, offset, id2, conn_end->id2);
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push_string_end(msg, offset, rsakey, conn_end->rsakey);
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push_string_end(msg, offset, cert, conn_end->cert);
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push_string_end(msg, offset, cert2, conn_end->cert2);
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push_string_end(msg, offset, cert_policy, conn_end->cert_policy);
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push_string_end(msg, offset, ca, conn_end->ca);
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push_string_end(msg, offset, ca2, conn_end->ca2);
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push_string_end(msg, offset, groups, conn_end->groups);
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push_string_end(msg, offset, groups2, conn_end->groups2);
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push_string_end(msg, offset, updown, conn_end->updown);
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if (conn_end->host)
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{
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msg_end->address = push_string(msg, conn_end->host);
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push_string_end(msg, offset, address, conn_end->host);
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}
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else
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{
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msg_end->address = push_string(msg, "%any");
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push_string_end(msg, offset, address, "%any");
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}
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push_string_end(msg, offset, subnets, conn_end->subnet);
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push_string_end(msg, offset, sourceip, conn_end->sourceip);
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push_string_end(msg, offset, dns, conn_end->dns);
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/* we can't assign it earlier as msg might change */
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msg_end = (stroke_end_t*)((char*)(*msg) + offset);
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msg_end->ikeport = conn_end->ikeport;
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msg_end->subnets = push_string(msg, conn_end->subnet);
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msg_end->sourceip = push_string(msg, conn_end->sourceip);
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msg_end->dns = push_string(msg, conn_end->dns);
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msg_end->sendcert = conn_end->sendcert;
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msg_end->hostaccess = conn_end->hostaccess;
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msg_end->tohost = !conn_end->subnet;
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@@ -147,187 +176,178 @@ static void starter_stroke_add_end(stroke_msg_t *msg, stroke_end_t *msg_end, sta
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int starter_stroke_add_conn(starter_config_t *cfg, starter_conn_t *conn)
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{
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stroke_msg_t msg;
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stroke_msg_t *msg;
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memset(&msg, 0, sizeof(msg));
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msg.type = STR_ADD_CONN;
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msg.length = offsetof(stroke_msg_t, buffer);
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msg.add_conn.version = conn->keyexchange;
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msg.add_conn.name = push_string(&msg, connection_name(conn));
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msg.add_conn.eap_identity = push_string(&msg, conn->eap_identity);
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msg.add_conn.aaa_identity = push_string(&msg, conn->aaa_identity);
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msg.add_conn.xauth_identity = push_string(&msg, conn->xauth_identity);
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msg = create_stroke_msg(STR_ADD_CONN);
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msg->add_conn.version = conn->keyexchange;
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push_string(&msg, add_conn.name, connection_name(conn));
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push_string(&msg, add_conn.eap_identity, conn->eap_identity);
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push_string(&msg, add_conn.aaa_identity, conn->aaa_identity);
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push_string(&msg, add_conn.xauth_identity, conn->xauth_identity);
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msg.add_conn.mode = conn->mode;
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msg.add_conn.proxy_mode = conn->proxy_mode;
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msg->add_conn.mode = conn->mode;
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msg->add_conn.proxy_mode = conn->proxy_mode;
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if (!(conn->options & SA_OPTION_DONT_REKEY))
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{
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msg.add_conn.rekey.reauth = !(conn->options & SA_OPTION_DONT_REAUTH);
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msg.add_conn.rekey.ipsec_lifetime = conn->sa_ipsec_life_seconds;
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msg.add_conn.rekey.ike_lifetime = conn->sa_ike_life_seconds;
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msg.add_conn.rekey.margin = conn->sa_rekey_margin;
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msg.add_conn.rekey.life_bytes = conn->sa_ipsec_life_bytes;
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msg.add_conn.rekey.margin_bytes = conn->sa_ipsec_margin_bytes;
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msg.add_conn.rekey.life_packets = conn->sa_ipsec_life_packets;
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msg.add_conn.rekey.margin_packets = conn->sa_ipsec_margin_packets;
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msg.add_conn.rekey.fuzz = conn->sa_rekey_fuzz;
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msg->add_conn.rekey.reauth = !(conn->options & SA_OPTION_DONT_REAUTH);
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msg->add_conn.rekey.ipsec_lifetime = conn->sa_ipsec_life_seconds;
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msg->add_conn.rekey.ike_lifetime = conn->sa_ike_life_seconds;
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msg->add_conn.rekey.margin = conn->sa_rekey_margin;
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msg->add_conn.rekey.life_bytes = conn->sa_ipsec_life_bytes;
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msg->add_conn.rekey.margin_bytes = conn->sa_ipsec_margin_bytes;
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msg->add_conn.rekey.life_packets = conn->sa_ipsec_life_packets;
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msg->add_conn.rekey.margin_packets = conn->sa_ipsec_margin_packets;
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msg->add_conn.rekey.fuzz = conn->sa_rekey_fuzz;
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}
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msg.add_conn.rekey.tries = conn->sa_keying_tries;
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msg->add_conn.rekey.tries = conn->sa_keying_tries;
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msg.add_conn.mobike = conn->options & SA_OPTION_MOBIKE;
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msg.add_conn.force_encap = conn->options & SA_OPTION_FORCE_ENCAP;
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msg.add_conn.fragmentation = conn->fragmentation;
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msg.add_conn.ikedscp = conn->ikedscp;
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msg.add_conn.ipcomp = conn->options & SA_OPTION_COMPRESS;
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msg.add_conn.install_policy = conn->install_policy;
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msg.add_conn.aggressive = conn->aggressive;
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msg.add_conn.pushmode = conn->options & SA_OPTION_MODECFG_PUSH;
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msg.add_conn.crl_policy = (crl_policy_t)cfg->setup.strictcrlpolicy;
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msg.add_conn.unique = cfg->setup.uniqueids;
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msg.add_conn.algorithms.ike = push_string(&msg, conn->ike);
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msg.add_conn.algorithms.esp = push_string(&msg, conn->esp);
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msg.add_conn.algorithms.ah = push_string(&msg, conn->ah);
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msg.add_conn.dpd.delay = conn->dpd_delay;
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msg.add_conn.dpd.timeout = conn->dpd_timeout;
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msg.add_conn.dpd.action = conn->dpd_action;
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msg.add_conn.close_action = conn->close_action;
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msg.add_conn.inactivity = conn->inactivity;
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msg.add_conn.ikeme.mediation = conn->me_mediation;
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msg.add_conn.ikeme.mediated_by = push_string(&msg, conn->me_mediated_by);
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msg.add_conn.ikeme.peerid = push_string(&msg, conn->me_peerid);
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msg.add_conn.reqid = conn->reqid;
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msg.add_conn.replay_window = conn->replay_window;
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msg.add_conn.mark_in.value = conn->mark_in.value;
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msg.add_conn.mark_in.mask = conn->mark_in.mask;
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msg.add_conn.mark_out.value = conn->mark_out.value;
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msg.add_conn.mark_out.mask = conn->mark_out.mask;
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msg.add_conn.tfc = conn->tfc;
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msg->add_conn.mobike = conn->options & SA_OPTION_MOBIKE;
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msg->add_conn.force_encap = conn->options & SA_OPTION_FORCE_ENCAP;
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msg->add_conn.fragmentation = conn->fragmentation;
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msg->add_conn.ikedscp = conn->ikedscp;
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msg->add_conn.ipcomp = conn->options & SA_OPTION_COMPRESS;
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msg->add_conn.install_policy = conn->install_policy;
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msg->add_conn.aggressive = conn->aggressive;
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msg->add_conn.pushmode = conn->options & SA_OPTION_MODECFG_PUSH;
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msg->add_conn.crl_policy = (crl_policy_t)cfg->setup.strictcrlpolicy;
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msg->add_conn.unique = cfg->setup.uniqueids;
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push_string(&msg, add_conn.algorithms.ike, conn->ike);
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push_string(&msg, add_conn.algorithms.esp, conn->esp);
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push_string(&msg, add_conn.algorithms.ah, conn->ah);
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msg->add_conn.dpd.delay = conn->dpd_delay;
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msg->add_conn.dpd.timeout = conn->dpd_timeout;
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msg->add_conn.dpd.action = conn->dpd_action;
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msg->add_conn.close_action = conn->close_action;
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msg->add_conn.inactivity = conn->inactivity;
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msg->add_conn.ikeme.mediation = conn->me_mediation;
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push_string(&msg, add_conn.ikeme.mediated_by, conn->me_mediated_by);
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push_string(&msg, add_conn.ikeme.peerid, conn->me_peerid);
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msg->add_conn.reqid = conn->reqid;
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msg->add_conn.replay_window = conn->replay_window;
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msg->add_conn.mark_in.value = conn->mark_in.value;
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msg->add_conn.mark_in.mask = conn->mark_in.mask;
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msg->add_conn.mark_out.value = conn->mark_out.value;
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msg->add_conn.mark_out.mask = conn->mark_out.mask;
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msg->add_conn.tfc = conn->tfc;
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starter_stroke_add_end(&msg, &msg.add_conn.me, &conn->left);
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starter_stroke_add_end(&msg, &msg.add_conn.other, &conn->right);
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add_end(&msg, offsetof(stroke_msg_t, add_conn.me), &conn->left);
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add_end(&msg, offsetof(stroke_msg_t, add_conn.other), &conn->right);
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if (!msg.add_conn.me.auth && !msg.add_conn.other.auth &&
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if (!msg->add_conn.me.auth && !msg->add_conn.other.auth &&
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conn->authby)
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{ /* leftauth/rightauth not set, use legacy options */
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if (streq(conn->authby, "rsa") || streq(conn->authby, "rsasig") ||
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streq(conn->authby, "ecdsa") || streq(conn->authby, "ecdsasig") ||
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streq(conn->authby, "pubkey"))
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{
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msg.add_conn.me.auth = push_string(&msg, "pubkey");
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msg.add_conn.other.auth = push_string(&msg, "pubkey");
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push_string(&msg, add_conn.me.auth, "pubkey");
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push_string(&msg, add_conn.other.auth, "pubkey");
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}
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else if (streq(conn->authby, "secret") || streq(conn->authby, "psk"))
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{
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msg.add_conn.me.auth = push_string(&msg, "psk");
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msg.add_conn.other.auth = push_string(&msg, "psk");
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push_string(&msg, add_conn.me.auth, "psk");
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push_string(&msg, add_conn.other.auth, "psk");
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}
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else if (streq(conn->authby, "xauthrsasig"))
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{
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msg.add_conn.me.auth = push_string(&msg, "pubkey");
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msg.add_conn.other.auth = push_string(&msg, "pubkey");
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push_string(&msg, add_conn.me.auth, "pubkey");
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push_string(&msg, add_conn.other.auth, "pubkey");
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if (conn->options & SA_OPTION_XAUTH_SERVER)
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{
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msg.add_conn.other.auth2 = push_string(&msg, "xauth");
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push_string(&msg, add_conn.other.auth2, "xauth");
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}
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else
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{
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msg.add_conn.me.auth2 = push_string(&msg, "xauth");
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push_string(&msg, add_conn.me.auth2, "xauth");
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}
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}
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else if (streq(conn->authby, "xauthpsk"))
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{
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msg.add_conn.me.auth = push_string(&msg, "psk");
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msg.add_conn.other.auth = push_string(&msg, "psk");
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push_string(&msg, add_conn.me.auth, "psk");
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push_string(&msg, add_conn.other.auth, "psk");
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if (conn->options & SA_OPTION_XAUTH_SERVER)
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{
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msg.add_conn.other.auth2 = push_string(&msg, "xauth");
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push_string(&msg, add_conn.other.auth2, "xauth");
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}
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else
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{
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msg.add_conn.me.auth2 = push_string(&msg, "xauth");
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push_string(&msg, add_conn.me.auth2, "xauth");
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}
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}
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}
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return send_stroke_msg(&msg);
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return send_stroke_msg(msg);
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}
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int starter_stroke_del_conn(starter_conn_t *conn)
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{
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stroke_msg_t msg;
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stroke_msg_t *msg;
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msg.type = STR_DEL_CONN;
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msg.length = offsetof(stroke_msg_t, buffer);
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msg.del_conn.name = push_string(&msg, connection_name(conn));
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return send_stroke_msg(&msg);
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msg = create_stroke_msg(STR_DEL_CONN);
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push_string(&msg, del_conn.name, connection_name(conn));
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return send_stroke_msg(msg);
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}
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int starter_stroke_route_conn(starter_conn_t *conn)
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{
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stroke_msg_t msg;
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stroke_msg_t *msg;
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msg.type = STR_ROUTE;
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msg.length = offsetof(stroke_msg_t, buffer);
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msg.route.name = push_string(&msg, connection_name(conn));
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return send_stroke_msg(&msg);
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msg = create_stroke_msg(STR_ROUTE);
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push_string(&msg, route.name, connection_name(conn));
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return send_stroke_msg(msg);
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}
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int starter_stroke_unroute_conn(starter_conn_t *conn)
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{
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stroke_msg_t msg;
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stroke_msg_t *msg;
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|
||||
msg.type = STR_UNROUTE;
|
||||
msg.length = offsetof(stroke_msg_t, buffer);
|
||||
msg.route.name = push_string(&msg, connection_name(conn));
|
||||
return send_stroke_msg(&msg);
|
||||
msg = create_stroke_msg(STR_UNROUTE);
|
||||
push_string(&msg, route.name, connection_name(conn));
|
||||
return send_stroke_msg(msg);
|
||||
}
|
||||
|
||||
int starter_stroke_initiate_conn(starter_conn_t *conn)
|
||||
{
|
||||
stroke_msg_t msg;
|
||||
stroke_msg_t *msg;
|
||||
|
||||
msg.type = STR_INITIATE;
|
||||
msg.length = offsetof(stroke_msg_t, buffer);
|
||||
msg.initiate.name = push_string(&msg, connection_name(conn));
|
||||
return send_stroke_msg(&msg);
|
||||
msg = create_stroke_msg(STR_INITIATE);
|
||||
push_string(&msg, initiate.name, connection_name(conn));
|
||||
return send_stroke_msg(msg);
|
||||
}
|
||||
|
||||
int starter_stroke_add_ca(starter_ca_t *ca)
|
||||
{
|
||||
stroke_msg_t msg;
|
||||
stroke_msg_t *msg;
|
||||
|
||||
msg.type = STR_ADD_CA;
|
||||
msg.length = offsetof(stroke_msg_t, buffer);
|
||||
msg.add_ca.name = push_string(&msg, ca->name);
|
||||
msg.add_ca.cacert = push_string(&msg, ca->cacert);
|
||||
msg.add_ca.crluri = push_string(&msg, ca->crluri);
|
||||
msg.add_ca.crluri2 = push_string(&msg, ca->crluri2);
|
||||
msg.add_ca.ocspuri = push_string(&msg, ca->ocspuri);
|
||||
msg.add_ca.ocspuri2 = push_string(&msg, ca->ocspuri2);
|
||||
msg.add_ca.certuribase = push_string(&msg, ca->certuribase);
|
||||
return send_stroke_msg(&msg);
|
||||
msg = create_stroke_msg(STR_ADD_CA);
|
||||
push_string(&msg, add_ca.name, ca->name);
|
||||
push_string(&msg, add_ca.cacert, ca->cacert);
|
||||
push_string(&msg, add_ca.crluri, ca->crluri);
|
||||
push_string(&msg, add_ca.crluri2, ca->crluri2);
|
||||
push_string(&msg, add_ca.ocspuri, ca->ocspuri);
|
||||
push_string(&msg, add_ca.ocspuri2, ca->ocspuri2);
|
||||
push_string(&msg, add_ca.certuribase, ca->certuribase);
|
||||
return send_stroke_msg(msg);
|
||||
}
|
||||
|
||||
int starter_stroke_del_ca(starter_ca_t *ca)
|
||||
{
|
||||
stroke_msg_t msg;
|
||||
stroke_msg_t *msg;
|
||||
|
||||
msg.type = STR_DEL_CA;
|
||||
msg.length = offsetof(stroke_msg_t, buffer);
|
||||
msg.del_ca.name = push_string(&msg, ca->name);
|
||||
return send_stroke_msg(&msg);
|
||||
msg = create_stroke_msg(STR_DEL_CA);
|
||||
push_string(&msg, del_ca.name, ca->name);
|
||||
return send_stroke_msg(msg);
|
||||
}
|
||||
|
||||
int starter_stroke_configure(starter_config_t *cfg)
|
||||
{
|
||||
stroke_msg_t msg;
|
||||
stroke_msg_t *msg;
|
||||
|
||||
if (cfg->setup.cachecrls)
|
||||
{
|
||||
msg.type = STR_CONFIG;
|
||||
msg.length = offsetof(stroke_msg_t, buffer);
|
||||
msg.config.cachecrl = 1;
|
||||
return send_stroke_msg(&msg);
|
||||
msg = create_stroke_msg(STR_CONFIG);
|
||||
msg->config.cachecrl = 1;
|
||||
return send_stroke_msg(msg);
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user