diff options
Diffstat (limited to 'pppd/cbcp.c')
-rw-r--r-- | pppd/cbcp.c | 488 |
1 files changed, 0 insertions, 488 deletions
diff --git a/pppd/cbcp.c b/pppd/cbcp.c deleted file mode 100644 index 7f2f787..0000000 --- a/pppd/cbcp.c +++ /dev/null @@ -1,488 +0,0 @@ -/* - * cbcp - Call Back Configuration Protocol. - * - * Copyright (c) 1995 Pedro Roque Marques. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * - * 3. The names of the authors of this software must not be used to - * endorse or promote products derived from this software without - * prior written permission. - * - * 4. Redistributions of any form whatsoever must retain the following - * acknowledgment: - * "This product includes software developed by Pedro Roque Marques - * <pedro_m@yahoo.com>" - * - * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO - * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY - * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY - * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES - * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN - * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING - * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. - */ - -#define RCSID "$Id: cbcp.c,v 1.17 2006/05/22 00:04:07 paulus Exp $" - -#include <stdio.h> -#include <string.h> -#include <sys/types.h> -#include <sys/time.h> - -#include "pppd.h" -#include "cbcp.h" -#include "fsm.h" -#include "lcp.h" - -static const char rcsid[] = RCSID; - -/* - * Options. - */ -static int setcbcp __P((char **)); - -static option_t cbcp_option_list[] = { - { "callback", o_special, (void *)setcbcp, - "Ask for callback", OPT_PRIO | OPT_A2STRVAL, &cbcp[0].us_number }, - { NULL } -}; - -/* - * Protocol entry points. - */ -static void cbcp_init __P((int unit)); -static void cbcp_open __P((int unit)); -static void cbcp_lowerup __P((int unit)); -static void cbcp_input __P((int unit, u_char *pkt, int len)); -static void cbcp_protrej __P((int unit)); -static int cbcp_printpkt __P((u_char *pkt, int len, - void (*printer) __P((void *, char *, ...)), - void *arg)); - -struct protent cbcp_protent = { - PPP_CBCP, - cbcp_init, - cbcp_input, - cbcp_protrej, - cbcp_lowerup, - NULL, - cbcp_open, - NULL, - cbcp_printpkt, - NULL, - 0, - "CBCP", - NULL, - cbcp_option_list, - NULL, - NULL, - NULL -}; - -cbcp_state cbcp[NUM_PPP]; - -/* internal prototypes */ - -static void cbcp_recvreq __P((cbcp_state *us, u_char *pckt, int len)); -static void cbcp_resp __P((cbcp_state *us)); -static void cbcp_up __P((cbcp_state *us)); -static void cbcp_recvack __P((cbcp_state *us, u_char *pckt, int len)); -static void cbcp_send __P((cbcp_state *us, int code, u_char *buf, int len)); - -/* option processing */ -static int -setcbcp(argv) - char **argv; -{ - lcp_wantoptions[0].neg_cbcp = 1; - cbcp_protent.enabled_flag = 1; - cbcp[0].us_number = strdup(*argv); - if (cbcp[0].us_number == 0) - novm("callback number"); - cbcp[0].us_type |= (1 << CB_CONF_USER); - cbcp[0].us_type |= (1 << CB_CONF_ADMIN); - return (1); -} - -/* init state */ -static void -cbcp_init(iface) - int iface; -{ - cbcp_state *us; - - us = &cbcp[iface]; - memset(us, 0, sizeof(cbcp_state)); - us->us_unit = iface; - us->us_type |= (1 << CB_CONF_NO); -} - -/* lower layer is up */ -static void -cbcp_lowerup(iface) - int iface; -{ - cbcp_state *us = &cbcp[iface]; - - dbglog("cbcp_lowerup"); - dbglog("want: %d", us->us_type); - - if (us->us_type == CB_CONF_USER) - dbglog("phone no: %s", us->us_number); -} - -static void -cbcp_open(unit) - int unit; -{ - dbglog("cbcp_open"); -} - -/* process an incomming packet */ -static void -cbcp_input(unit, inpacket, pktlen) - int unit; - u_char *inpacket; - int pktlen; -{ - u_char *inp; - u_char code, id; - u_short len; - - cbcp_state *us = &cbcp[unit]; - - inp = inpacket; - - if (pktlen < CBCP_MINLEN) { - if (debug) - dbglog("CBCP packet is too small"); - return; - } - - GETCHAR(code, inp); - GETCHAR(id, inp); - GETSHORT(len, inp); - - if (len > pktlen || len < CBCP_MINLEN) { - if (debug) - dbglog("CBCP packet: invalid length %d", len); - return; - } - - len -= CBCP_MINLEN; - - switch(code) { - case CBCP_REQ: - us->us_id = id; - cbcp_recvreq(us, inp, len); - break; - - case CBCP_RESP: - if (debug) - dbglog("CBCP_RESP received"); - break; - - case CBCP_ACK: - if (debug && id != us->us_id) - dbglog("id doesn't match: expected %d recv %d", - us->us_id, id); - - cbcp_recvack(us, inp, len); - break; - - default: - break; - } -} - -/* protocol was rejected by foe */ -void cbcp_protrej(int iface) -{ -} - -char *cbcp_codenames[] = { - "Request", "Response", "Ack" -}; - -char *cbcp_optionnames[] = { - "NoCallback", - "UserDefined", - "AdminDefined", - "List" -}; - -/* pretty print a packet */ -static int -cbcp_printpkt(p, plen, printer, arg) - u_char *p; - int plen; - void (*printer) __P((void *, char *, ...)); - void *arg; -{ - int code, opt, id, len, olen, delay; - u_char *pstart; - - if (plen < HEADERLEN) - return 0; - pstart = p; - GETCHAR(code, p); - GETCHAR(id, p); - GETSHORT(len, p); - if (len < HEADERLEN || len > plen) - return 0; - - if (code >= 1 && code <= sizeof(cbcp_codenames) / sizeof(char *)) - printer(arg, " %s", cbcp_codenames[code-1]); - else - printer(arg, " code=0x%x", code); - - printer(arg, " id=0x%x", id); - len -= HEADERLEN; - - switch (code) { - case CBCP_REQ: - case CBCP_RESP: - case CBCP_ACK: - while(len >= 2) { - GETCHAR(opt, p); - GETCHAR(olen, p); - - if (olen < 2 || olen > len) { - break; - } - - printer(arg, " <"); - len -= olen; - - if (opt >= 1 && opt <= sizeof(cbcp_optionnames) / sizeof(char *)) - printer(arg, " %s", cbcp_optionnames[opt-1]); - else - printer(arg, " option=0x%x", opt); - - if (olen > 2) { - GETCHAR(delay, p); - printer(arg, " delay = %d", delay); - } - - if (olen > 3) { - int addrt; - char str[256]; - - GETCHAR(addrt, p); - memcpy(str, p, olen - 4); - str[olen - 4] = 0; - printer(arg, " number = %s", str); - } - printer(arg, ">"); - } - break; - - default: - break; - } - - for (; len > 0; --len) { - GETCHAR(code, p); - printer(arg, " %.2x", code); - } - - return p - pstart; -} - -/* received CBCP request */ -static void -cbcp_recvreq(us, pckt, pcktlen) - cbcp_state *us; - u_char *pckt; - int pcktlen; -{ - u_char type, opt_len, delay, addr_type; - char address[256]; - int len = pcktlen; - - address[0] = 0; - - while (len >= 2) { - dbglog("length: %d", len); - - GETCHAR(type, pckt); - GETCHAR(opt_len, pckt); - if (opt_len < 2 || opt_len > len) - break; - - if (opt_len > 2) - GETCHAR(delay, pckt); - - us->us_allowed |= (1 << type); - - switch(type) { - case CB_CONF_NO: - dbglog("no callback allowed"); - break; - - case CB_CONF_USER: - dbglog("user callback allowed"); - if (opt_len > 4) { - GETCHAR(addr_type, pckt); - memcpy(address, pckt, opt_len - 4); - address[opt_len - 4] = 0; - if (address[0]) - dbglog("address: %s", address); - } - break; - - case CB_CONF_ADMIN: - dbglog("user admin defined allowed"); - break; - - case CB_CONF_LIST: - break; - } - len -= opt_len; - } - if (len != 0) { - if (debug) - dbglog("cbcp_recvreq: malformed packet (%d bytes left)", len); - return; - } - - cbcp_resp(us); -} - -static void -cbcp_resp(us) - cbcp_state *us; -{ - u_char cb_type; - u_char buf[256]; - u_char *bufp = buf; - int len = 0; - int slen; - - cb_type = us->us_allowed & us->us_type; - dbglog("cbcp_resp cb_type=%d", cb_type); - -#if 0 - if (!cb_type) - lcp_down(us->us_unit); -#endif - - if (cb_type & ( 1 << CB_CONF_USER ) ) { - dbglog("cbcp_resp CONF_USER"); - slen = strlen(us->us_number); - if (slen > 250) { - warn("callback number truncated to 250 characters"); - slen = 250; - } - PUTCHAR(CB_CONF_USER, bufp); - len = 3 + 1 + slen + 1; - PUTCHAR(len , bufp); - PUTCHAR(5, bufp); /* delay */ - PUTCHAR(1, bufp); - BCOPY(us->us_number, bufp, slen + 1); - cbcp_send(us, CBCP_RESP, buf, len); - return; - } - - if (cb_type & ( 1 << CB_CONF_ADMIN ) ) { - dbglog("cbcp_resp CONF_ADMIN"); - PUTCHAR(CB_CONF_ADMIN, bufp); - len = 3; - PUTCHAR(len, bufp); - PUTCHAR(5, bufp); /* delay */ - cbcp_send(us, CBCP_RESP, buf, len); - return; - } - - if (cb_type & ( 1 << CB_CONF_NO ) ) { - dbglog("cbcp_resp CONF_NO"); - PUTCHAR(CB_CONF_NO, bufp); - len = 2; - PUTCHAR(len , bufp); - cbcp_send(us, CBCP_RESP, buf, len); - start_networks(us->us_unit); - return; - } -} - -static void -cbcp_send(us, code, buf, len) - cbcp_state *us; - int code; - u_char *buf; - int len; -{ - u_char *outp; - int outlen; - - outp = outpacket_buf; - - outlen = 4 + len; - - MAKEHEADER(outp, PPP_CBCP); - - PUTCHAR(code, outp); - PUTCHAR(us->us_id, outp); - PUTSHORT(outlen, outp); - - if (len) - BCOPY(buf, outp, len); - - output(us->us_unit, outpacket_buf, outlen + PPP_HDRLEN); -} - -static void -cbcp_recvack(us, pckt, len) - cbcp_state *us; - u_char *pckt; - int len; -{ - u_char type, delay, addr_type; - int opt_len; - char address[256]; - - if (len >= 2) { - GETCHAR(type, pckt); - GETCHAR(opt_len, pckt); - if (opt_len >= 2 && opt_len <= len) { - - if (opt_len > 2) - GETCHAR(delay, pckt); - - if (opt_len > 4) { - GETCHAR(addr_type, pckt); - memcpy(address, pckt, opt_len - 4); - address[opt_len - 4] = 0; - if (address[0]) - dbglog("peer will call: %s", address); - } - if (type == CB_CONF_NO) - return; - - cbcp_up(us); - - } else if (debug) - dbglog("cbcp_recvack: malformed packet"); - } -} - -/* ok peer will do callback */ -static void -cbcp_up(us) - cbcp_state *us; -{ - persist = 0; - status = EXIT_CALLBACK; - lcp_close(0, "Call me back, please"); -} |