diff options
Diffstat (limited to 'gatchat/ppp_lcp.c')
| -rw-r--r-- | gatchat/ppp_lcp.c | 246 |
1 files changed, 246 insertions, 0 deletions
diff --git a/gatchat/ppp_lcp.c b/gatchat/ppp_lcp.c new file mode 100644 index 00000000..644842a4 --- /dev/null +++ b/gatchat/ppp_lcp.c @@ -0,0 +1,246 @@ +/* + * + * PPP library with GLib integration + * + * Copyright (C) 2009-2010 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program 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 this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdio.h> +#include <fcntl.h> +#include <unistd.h> +#include <string.h> +#include <termios.h> +#include <glib.h> +#include <arpa/inet.h> +#include "gatppp.h" +#include "ppp.h" + +enum lcp_options { + RESERVED = 0, + MRU = 1, + ACCM = 2, + AUTH_PROTO = 3, + QUAL_PROTO = 4, + MAGIC_NUMBER = 5, + DEPRECATED_QUAL_PROTO = 6, + PFC = 7, + ACFC = 8, +}; + +#define LCP_SUPPORTED_CODES ((1 << CONFIGURE_REQUEST) | \ + (1 << CONFIGURE_ACK) | \ + (1 << CONFIGURE_NAK) | \ + (1 << CONFIGURE_REJECT) | \ + (1 << TERMINATE_REQUEST) | \ + (1 << TERMINATE_ACK) | \ + (1 << CODE_REJECT) | \ + (1 << PROTOCOL_REJECT) | \ + (1 << ECHO_REQUEST) | \ + (1 << ECHO_REPLY) | \ + (1 << DISCARD_REQUEST)) + +/* + * signal the Up event to the NCP + */ +static void lcp_up(struct pppcp_data *pppcp) +{ + ppp_generate_event(pppcp->ppp, PPP_OPENED); +} + +/* + * signal the Down event to the NCP + */ +static void lcp_down(struct pppcp_data *pppcp) +{ + ppp_generate_event(pppcp->ppp, PPP_DOWN); +} + +/* + * Indicate that the lower layer is now needed + * Should trigger Up event + */ +static void lcp_started(struct pppcp_data *pppcp) +{ + ppp_generate_event(pppcp->ppp, PPP_UP); +} + +/* + * Indicate that the lower layer is not needed + * Should trigger Down event + */ +static void lcp_finished(struct pppcp_data *pppcp) +{ + ppp_generate_event(pppcp->ppp, PPP_CLOSING); +} + +/* + * Scan the option to see if it is acceptable, unacceptable, or rejected + * + * We need to use a default case here because this option type value + * could be anything. + */ +static guint lcp_option_scan(struct ppp_option *option, gpointer user) +{ + switch (option->type) { + case ACCM: + case AUTH_PROTO: + /* XXX check to make sure it's a proto we recognize */ + case MAGIC_NUMBER: + case PFC: + case ACFC: + return OPTION_ACCEPT; + break; + default: + return OPTION_REJECT; + } +} + +/* + * act on an acceptable option + * + * We need to use a default case here because this option type value + * could be anything. + */ +static void lcp_option_process(gpointer data, gpointer user) +{ + struct ppp_option *option = data; + struct pppcp_data *pppcp = user; + GAtPPP *ppp = pppcp->ppp; + guint32 magic; + + switch (option->type) { + case ACCM: + ppp_set_recv_accm(ppp, get_host_long(option->data)); + break; + case AUTH_PROTO: + ppp_set_auth(ppp, option->data); + break; + case MAGIC_NUMBER: + /* XXX handle loopback */ + magic = get_host_long(option->data); + if (magic != pppcp->magic_number) + pppcp->magic_number = magic; + else + g_print("looped back? I should do something\n"); + break; + case PFC: + ppp_set_pfc(ppp, TRUE); + break; + case ACFC: + ppp_set_acfc(ppp, TRUE); + break; + default: + g_printerr("unhandled option %d\n", option->type); + } +} + +struct ppp_packet_handler lcp_packet_handler = { + .proto = LCP_PROTOCOL, + .handler = pppcp_process_packet, +}; + +struct pppcp_action lcp_action = { + .this_layer_up = lcp_up, + .this_layer_down = lcp_down, + .this_layer_started = lcp_started, + .this_layer_finished = lcp_finished, + .option_scan = lcp_option_scan, + .option_process = lcp_option_process, +}; + +void lcp_open(struct pppcp_data *data) +{ + if (data == NULL) + return; + + /* send an open event to the lcp layer */ + pppcp_generate_event(data, OPEN, NULL, 0); +} + +void lcp_close(struct pppcp_data *data) +{ + if (data == NULL) + return; + + /* send a CLOSE event to the lcp layer */ + pppcp_generate_event(data, CLOSE, NULL, 0); +} + +void lcp_establish(struct pppcp_data *data) +{ + if (data == NULL) + return; + + /* send an UP event to the lcp layer */ + pppcp_generate_event(data, UP, NULL, 0); +} + +void lcp_terminate(struct pppcp_data *data) +{ + if (data == NULL) + return; + + /* send a DOWN event to the lcp layer */ + pppcp_generate_event(data, DOWN, NULL, 0); +} + +void lcp_free(struct pppcp_data *lcp) +{ + if (lcp == NULL) + return; + + /* TBD unregister packet handler */ + + pppcp_free(lcp); +} + +struct pppcp_data * lcp_new(GAtPPP *ppp) +{ + struct pppcp_data *pppcp; + struct ppp_option *option; + guint16 codes = LCP_SUPPORTED_CODES; + + pppcp = pppcp_new(ppp, LCP_PROTOCOL, NULL); + if (!pppcp) { + g_print("Failed to allocate PPPCP struct\n"); + return NULL; + } + pppcp_set_valid_codes(pppcp, codes); + pppcp->priv = pppcp; + + /* set the actions */ + pppcp->action = &lcp_action; + + /* add the default config options */ + option = g_try_malloc0(6); + if (option == NULL) { + pppcp_free(pppcp); + return NULL; + } + option->type = ACCM; + option->length = 6; + pppcp_add_config_option(pppcp, option); + + /* register packet handler for LCP protocol */ + lcp_packet_handler.priv = pppcp; + ppp_register_packet_handler(&lcp_packet_handler); + return pppcp; +} |