* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
-#ifndef lint
-static char rcsid[] = "$Id: ipcp.c,v 1.29 1996/09/26 06:21:33 paulus Exp $";
-#endif
+#define RCSID "$Id: ipcp.c,v 1.60 2002/01/22 16:02:58 dfs Exp $"
/*
* TODO:
#include <stdio.h>
#include <string.h>
-#include <syslog.h>
+#include <stdlib.h>
#include <netdb.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
+#include <arpa/inet.h>
#include "pppd.h"
#include "fsm.h"
#include "ipcp.h"
#include "pathnames.h"
+static const char rcsid[] = RCSID;
+
/* global vars */
ipcp_options ipcp_wantoptions[NUM_PPP]; /* Options that we want to request */
ipcp_options ipcp_gotoptions[NUM_PPP]; /* Options that peer ack'd */
-ipcp_options ipcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
+ipcp_options ipcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
ipcp_options ipcp_hisoptions[NUM_PPP]; /* Options that we ack'd */
+u_int32_t netmask = 0; /* IP netmask to set on interface */
+
+bool disable_defaultip = 0; /* Don't use hostname for default IP adrs */
+
+/* Hook for a plugin to know when IP protocol has come up */
+void (*ip_up_hook) __P((void)) = NULL;
+
+/* Hook for a plugin to know when IP protocol has come down */
+void (*ip_down_hook) __P((void)) = NULL;
+
+/* Hook for a plugin to choose the remote IP address */
+void (*ip_choose_hook) __P((u_int32_t *)) = NULL;
+
+/* Notifiers for when IPCP goes up and down */
+struct notifier *ip_up_notifier = NULL;
+struct notifier *ip_down_notifier = NULL;
+
/* local vars */
-static int cis_received[NUM_PPP]; /* # Conf-Reqs received */
static int default_route_set[NUM_PPP]; /* Have set up a default route */
static int proxy_arp_set[NUM_PPP]; /* Have created proxy arp entry */
+static bool usepeerdns; /* Ask peer for DNS addrs */
+static int ipcp_is_up; /* have called np_up() */
+static bool ask_for_local; /* request our address from peer */
+static char vj_value[8]; /* string form of vj option value */
+static char netmask_str[20]; /* string form of netmask value */
/*
* Callbacks for fsm code. (CI = Configuration Information)
static int ipcp_reqci __P((fsm *, u_char *, int *, int)); /* Rcv CI */
static void ipcp_up __P((fsm *)); /* We're UP */
static void ipcp_down __P((fsm *)); /* We're DOWN */
-static void ipcp_script __P((fsm *, char *)); /* Run an up/down script */
static void ipcp_finished __P((fsm *)); /* Don't need lower layer */
fsm ipcp_fsm[NUM_PPP]; /* IPCP fsm structure */
"IPCP" /* String name of protocol */
};
+/*
+ * Command-line options.
+ */
+static int setvjslots __P((char **));
+static int setdnsaddr __P((char **));
+static int setwinsaddr __P((char **));
+static int setnetmask __P((char **));
+int setipaddr __P((char *, char **, int));
+static void printipaddr __P((option_t *, void (*)(void *, char *,...),void *));
+
+static option_t ipcp_option_list[] = {
+ { "noip", o_bool, &ipcp_protent.enabled_flag,
+ "Disable IP and IPCP" },
+ { "-ip", o_bool, &ipcp_protent.enabled_flag,
+ "Disable IP and IPCP", OPT_ALIAS },
+
+ { "novj", o_bool, &ipcp_wantoptions[0].neg_vj,
+ "Disable VJ compression", OPT_A2CLR, &ipcp_allowoptions[0].neg_vj },
+ { "-vj", o_bool, &ipcp_wantoptions[0].neg_vj,
+ "Disable VJ compression", OPT_ALIAS | OPT_A2CLR,
+ &ipcp_allowoptions[0].neg_vj },
+
+ { "novjccomp", o_bool, &ipcp_wantoptions[0].cflag,
+ "Disable VJ connection-ID compression", OPT_A2CLR,
+ &ipcp_allowoptions[0].cflag },
+ { "-vjccomp", o_bool, &ipcp_wantoptions[0].cflag,
+ "Disable VJ connection-ID compression", OPT_ALIAS | OPT_A2CLR,
+ &ipcp_allowoptions[0].cflag },
+
+ { "vj-max-slots", o_special, (void *)setvjslots,
+ "Set maximum VJ header slots",
+ OPT_PRIO | OPT_A2STRVAL | OPT_STATIC, vj_value },
+
+ { "ipcp-accept-local", o_bool, &ipcp_wantoptions[0].accept_local,
+ "Accept peer's address for us", 1 },
+ { "ipcp-accept-remote", o_bool, &ipcp_wantoptions[0].accept_remote,
+ "Accept peer's address for it", 1 },
+
+ { "ipparam", o_string, &ipparam,
+ "Set ip script parameter", OPT_PRIO },
+
+ { "noipdefault", o_bool, &disable_defaultip,
+ "Don't use name for default IP adrs", 1 },
+
+ { "ms-dns", 1, (void *)setdnsaddr,
+ "DNS address for the peer's use" },
+ { "ms-wins", 1, (void *)setwinsaddr,
+ "Nameserver for SMB over TCP/IP for peer" },
+
+ { "ipcp-restart", o_int, &ipcp_fsm[0].timeouttime,
+ "Set timeout for IPCP", OPT_PRIO },
+ { "ipcp-max-terminate", o_int, &ipcp_fsm[0].maxtermtransmits,
+ "Set max #xmits for term-reqs", OPT_PRIO },
+ { "ipcp-max-configure", o_int, &ipcp_fsm[0].maxconfreqtransmits,
+ "Set max #xmits for conf-reqs", OPT_PRIO },
+ { "ipcp-max-failure", o_int, &ipcp_fsm[0].maxnakloops,
+ "Set max #conf-naks for IPCP", OPT_PRIO },
+
+ { "defaultroute", o_bool, &ipcp_wantoptions[0].default_route,
+ "Add default route", OPT_ENABLE|1, &ipcp_allowoptions[0].default_route },
+ { "nodefaultroute", o_bool, &ipcp_allowoptions[0].default_route,
+ "disable defaultroute option", OPT_A2CLR,
+ &ipcp_wantoptions[0].default_route },
+ { "-defaultroute", o_bool, &ipcp_allowoptions[0].default_route,
+ "disable defaultroute option", OPT_ALIAS | OPT_A2CLR,
+ &ipcp_wantoptions[0].default_route },
+
+ { "proxyarp", o_bool, &ipcp_wantoptions[0].proxy_arp,
+ "Add proxy ARP entry", OPT_ENABLE|1, &ipcp_allowoptions[0].proxy_arp },
+ { "noproxyarp", o_bool, &ipcp_allowoptions[0].proxy_arp,
+ "disable proxyarp option", OPT_A2CLR,
+ &ipcp_wantoptions[0].proxy_arp },
+ { "-proxyarp", o_bool, &ipcp_allowoptions[0].proxy_arp,
+ "disable proxyarp option", OPT_ALIAS | OPT_A2CLR,
+ &ipcp_wantoptions[0].proxy_arp },
+
+ { "usepeerdns", o_bool, &usepeerdns,
+ "Ask peer for DNS address(es)", 1 },
+
+ { "netmask", o_special, (void *)setnetmask,
+ "set netmask", OPT_PRIO | OPT_A2STRVAL | OPT_STATIC, netmask_str },
+
+ { "IP addresses", o_wild, (void *) &setipaddr,
+ "set local and remote IP addresses",
+ OPT_NOARG | OPT_A2PRINTER, (void *) &printipaddr },
+
+ { NULL }
+};
+
/*
* Protocol entry points from main code.
*/
static void ip_check_options __P((void));
static int ip_demand_conf __P((int));
static int ip_active_pkt __P((u_char *, int));
+static void create_resolv __P((u_int32_t, u_int32_t));
struct protent ipcp_protent = {
PPP_IPCP,
NULL,
1,
"IPCP",
+ "IP",
+ ipcp_option_list,
ip_check_options,
ip_demand_conf,
ip_active_pkt
};
+static void ipcp_clear_addrs __P((int, u_int32_t, u_int32_t));
+static void ipcp_script __P((char *)); /* Run an up/down script */
+static void ipcp_script_done __P((void *));
+
/*
* Lengths of configuration options.
*/
#define CODENAME(x) ((x) == CONFACK ? "ACK" : \
(x) == CONFNAK ? "NAK" : "REJ")
+/*
+ * This state variable is used to ensure that we don't
+ * run an ipcp-up/down script while one is already running.
+ */
+static enum script_state {
+ s_down,
+ s_up,
+} ipcp_script_state;
+static pid_t ipcp_script_pid;
/*
* Make a string representation of a network IP address.
{
static char b[64];
- ipaddr = ntohl(ipaddr);
-
- sprintf(b, "%d.%d.%d.%d",
- (u_char)(ipaddr >> 24),
- (u_char)(ipaddr >> 16),
- (u_char)(ipaddr >> 8),
- (u_char)(ipaddr));
+ slprintf(b, sizeof(b), "%I", ipaddr);
return b;
}
+/*
+ * Option parsing.
+ */
+
+/*
+ * setvjslots - set maximum number of connection slots for VJ compression
+ */
+static int
+setvjslots(argv)
+ char **argv;
+{
+ int value;
+
+ if (!int_option(*argv, &value))
+ return 0;
+ if (value < 2 || value > 16) {
+ option_error("vj-max-slots value must be between 2 and 16");
+ return 0;
+ }
+ ipcp_wantoptions [0].maxslotindex =
+ ipcp_allowoptions[0].maxslotindex = value - 1;
+ slprintf(vj_value, sizeof(vj_value), "%d", value);
+ return 1;
+}
+
+/*
+ * setdnsaddr - set the dns address(es)
+ */
+static int
+setdnsaddr(argv)
+ char **argv;
+{
+ u_int32_t dns;
+ struct hostent *hp;
+
+ dns = inet_addr(*argv);
+ if (dns == (u_int32_t) -1) {
+ if ((hp = gethostbyname(*argv)) == NULL) {
+ option_error("invalid address parameter '%s' for ms-dns option",
+ *argv);
+ return 0;
+ }
+ dns = *(u_int32_t *)hp->h_addr;
+ }
+
+ /* We take the last 2 values given, the 2nd-last as the primary
+ and the last as the secondary. If only one is given it
+ becomes both primary and secondary. */
+ if (ipcp_allowoptions[0].dnsaddr[1] == 0)
+ ipcp_allowoptions[0].dnsaddr[0] = dns;
+ else
+ ipcp_allowoptions[0].dnsaddr[0] = ipcp_allowoptions[0].dnsaddr[1];
+
+ /* always set the secondary address value. */
+ ipcp_allowoptions[0].dnsaddr[1] = dns;
+
+ return (1);
+}
+
+/*
+ * setwinsaddr - set the wins address(es)
+ * This is primrarly used with the Samba package under UNIX or for pointing
+ * the caller to the existing WINS server on a Windows NT platform.
+ */
+static int
+setwinsaddr(argv)
+ char **argv;
+{
+ u_int32_t wins;
+ struct hostent *hp;
+
+ wins = inet_addr(*argv);
+ if (wins == (u_int32_t) -1) {
+ if ((hp = gethostbyname(*argv)) == NULL) {
+ option_error("invalid address parameter '%s' for ms-wins option",
+ *argv);
+ return 0;
+ }
+ wins = *(u_int32_t *)hp->h_addr;
+ }
+
+ /* We take the last 2 values given, the 2nd-last as the primary
+ and the last as the secondary. If only one is given it
+ becomes both primary and secondary. */
+ if (ipcp_allowoptions[0].winsaddr[1] == 0)
+ ipcp_allowoptions[0].winsaddr[0] = wins;
+ else
+ ipcp_allowoptions[0].winsaddr[0] = ipcp_allowoptions[0].winsaddr[1];
+
+ /* always set the secondary address value. */
+ ipcp_allowoptions[0].winsaddr[1] = wins;
+
+ return (1);
+}
+
+/*
+ * setipaddr - Set the IP address
+ * If doit is 0, the call is to check whether this option is
+ * potentially an IP address specification.
+ * Not static so that plugins can call it to set the addresses
+ */
+int
+setipaddr(arg, argv, doit)
+ char *arg;
+ char **argv;
+ int doit;
+{
+ struct hostent *hp;
+ char *colon;
+ u_int32_t local, remote;
+ ipcp_options *wo = &ipcp_wantoptions[0];
+ static int prio_local = 0, prio_remote = 0;
+
+ /*
+ * IP address pair separated by ":".
+ */
+ if ((colon = strchr(arg, ':')) == NULL)
+ return 0;
+ if (!doit)
+ return 1;
+
+ /*
+ * If colon first character, then no local addr.
+ */
+ if (colon != arg && option_priority >= prio_local) {
+ *colon = '\0';
+ if ((local = inet_addr(arg)) == (u_int32_t) -1) {
+ if ((hp = gethostbyname(arg)) == NULL) {
+ option_error("unknown host: %s", arg);
+ return 0;
+ }
+ local = *(u_int32_t *)hp->h_addr;
+ }
+ if (bad_ip_adrs(local)) {
+ option_error("bad local IP address %s", ip_ntoa(local));
+ return 0;
+ }
+ if (local != 0)
+ wo->ouraddr = local;
+ *colon = ':';
+ prio_local = option_priority;
+ }
+
+ /*
+ * If colon last character, then no remote addr.
+ */
+ if (*++colon != '\0' && option_priority >= prio_remote) {
+ if ((remote = inet_addr(colon)) == (u_int32_t) -1) {
+ if ((hp = gethostbyname(colon)) == NULL) {
+ option_error("unknown host: %s", colon);
+ return 0;
+ }
+ remote = *(u_int32_t *)hp->h_addr;
+ if (remote_name[0] == 0)
+ strlcpy(remote_name, colon, sizeof(remote_name));
+ }
+ if (bad_ip_adrs(remote)) {
+ option_error("bad remote IP address %s", ip_ntoa(remote));
+ return 0;
+ }
+ if (remote != 0)
+ wo->hisaddr = remote;
+ prio_remote = option_priority;
+ }
+
+ return 1;
+}
+
+static void
+printipaddr(opt, printer, arg)
+ option_t *opt;
+ void (*printer) __P((void *, char *, ...));
+ void *arg;
+{
+ ipcp_options *wo = &ipcp_wantoptions[0];
+
+ if (wo->ouraddr != 0)
+ printer(arg, "%I", wo->ouraddr);
+ printer(arg, ":");
+ if (wo->hisaddr != 0)
+ printer(arg, "%I", wo->hisaddr);
+}
+
+/*
+ * setnetmask - set the netmask to be used on the interface.
+ */
+static int
+setnetmask(argv)
+ char **argv;
+{
+ u_int32_t mask;
+ int n;
+ char *p;
+
+ /*
+ * Unfortunately, if we use inet_addr, we can't tell whether
+ * a result of all 1s is an error or a valid 255.255.255.255.
+ */
+ p = *argv;
+ n = parse_dotted_ip(p, &mask);
+
+ mask = htonl(mask);
+
+ if (n == 0 || p[n] != 0 || (netmask & ~mask) != 0) {
+ option_error("invalid netmask value '%s'", *argv);
+ return 0;
+ }
+
+ netmask = mask;
+ slprintf(netmask_str, sizeof(netmask_str), "%I", mask);
+
+ return (1);
+}
+
+int
+parse_dotted_ip(p, vp)
+ char *p;
+ u_int32_t *vp;
+{
+ int n;
+ u_int32_t v, b;
+ char *endp, *p0 = p;
+
+ v = 0;
+ for (n = 3;; --n) {
+ b = strtoul(p, &endp, 0);
+ if (endp == p)
+ return 0;
+ if (b > 255) {
+ if (n < 3)
+ return 0;
+ /* accept e.g. 0xffffff00 */
+ *vp = b;
+ return endp - p0;
+ }
+ v |= b << (n * 8);
+ p = endp;
+ if (n == 0)
+ break;
+ if (*p != '.')
+ return 0;
+ ++p;
+ }
+ *vp = v;
+ return p - p0;
+}
+
/*
* ipcp_init - Initialize IPCP.
wo->maxslotindex = MAX_STATES - 1; /* really max index */
wo->cflag = 1;
+
/* max slots and slot-id compression are currently hardwired in */
/* ppp_if.c to 16 and 1, this needs to be changed (among other */
/* things) gmc */
/*
* ipcp_resetci - Reset our CI.
+ * Called by fsm_sconfreq, Send Configure Request.
*/
static void
ipcp_resetci(f)
fsm *f;
{
ipcp_options *wo = &ipcp_wantoptions[f->unit];
+ ipcp_options *go = &ipcp_gotoptions[f->unit];
wo->req_addr = wo->neg_addr && ipcp_allowoptions[f->unit].neg_addr;
if (wo->ouraddr == 0)
wo->accept_local = 1;
if (wo->hisaddr == 0)
wo->accept_remote = 1;
- ipcp_gotoptions[f->unit] = *wo;
- cis_received[f->unit] = 0;
+ wo->req_dns1 = usepeerdns; /* Request DNS addresses from the peer */
+ wo->req_dns2 = usepeerdns;
+ *go = *wo;
+ if (!ask_for_local)
+ go->ouraddr = 0;
+ if (ip_choose_hook) {
+ ip_choose_hook(&wo->hisaddr);
+ if (wo->hisaddr) {
+ wo->accept_remote = 0;
+ }
+ }
}
/*
* ipcp_cilen - Return length of our CI.
+ * Called by fsm_sconfreq, Send Configure Request.
*/
static int
ipcp_cilen(f)
#define LENCIVJ(neg, old) (neg ? (old? CILEN_COMPRESS : CILEN_VJ) : 0)
#define LENCIADDR(neg, old) (neg ? (old? CILEN_ADDRS : CILEN_ADDR) : 0)
+#define LENCIDNS(neg) (neg ? (CILEN_ADDR) : 0)
/*
* First see if we want to change our options to the old
}
if (wo->neg_vj && !go->neg_vj && !go->old_vj) {
/* try an older style of VJ negotiation */
- if (cis_received[f->unit] == 0) {
- /* keep trying the new style until we see some CI from the peer */
+ /* use the old style only if the peer did */
+ if (ho->neg_vj && ho->old_vj) {
go->neg_vj = 1;
- } else {
- /* use the old style only if the peer did */
- if (ho->neg_vj && ho->old_vj) {
- go->neg_vj = 1;
- go->old_vj = 1;
- go->vj_protocol = ho->vj_protocol;
- }
+ go->old_vj = 1;
+ go->vj_protocol = ho->vj_protocol;
}
}
return (LENCIADDR(go->neg_addr, go->old_addrs) +
- LENCIVJ(go->neg_vj, go->old_vj));
+ LENCIVJ(go->neg_vj, go->old_vj) +
+ LENCIDNS(go->req_dns1) +
+ LENCIDNS(go->req_dns2)) ;
}
/*
* ipcp_addci - Add our desired CIs to a packet.
+ * Called by fsm_sconfreq, Send Configure Request.
*/
static void
ipcp_addci(f, ucp, lenp)
neg = 0; \
}
+#define ADDCIDNS(opt, neg, addr) \
+ if (neg) { \
+ if (len >= CILEN_ADDR) { \
+ u_int32_t l; \
+ PUTCHAR(opt, ucp); \
+ PUTCHAR(CILEN_ADDR, ucp); \
+ l = ntohl(addr); \
+ PUTLONG(l, ucp); \
+ len -= CILEN_ADDR; \
+ } else \
+ neg = 0; \
+ }
+
ADDCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
go->old_addrs, go->ouraddr, go->hisaddr);
ADDCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
go->maxslotindex, go->cflag);
+ ADDCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
+
+ ADDCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
+
*lenp -= len;
}
/*
* ipcp_ackci - Ack our CIs.
+ * Called by fsm_rconfack, Receive Configure ACK.
*
* Returns:
* 0 - Ack was bad.
} \
}
+#define ACKCIDNS(opt, neg, addr) \
+ if (neg) { \
+ u_int32_t l; \
+ if ((len -= CILEN_ADDR) < 0) \
+ goto bad; \
+ GETCHAR(citype, p); \
+ GETCHAR(cilen, p); \
+ if (cilen != CILEN_ADDR || citype != opt) \
+ goto bad; \
+ GETLONG(l, p); \
+ cilong = htonl(l); \
+ if (addr != cilong) \
+ goto bad; \
+ }
+
ACKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
go->old_addrs, go->ouraddr, go->hisaddr);
ACKCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
go->maxslotindex, go->cflag);
+ ACKCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
+
+ ACKCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
+
/*
* If there are any remaining CIs, then this packet is bad.
*/
return (1);
bad:
- IPCPDEBUG((LOG_INFO, "ipcp_ackci: received bad Ack!"));
+ IPCPDEBUG(("ipcp_ackci: received bad Ack!"));
return (0);
}
* ipcp_nakci - Peer has sent a NAK for some of our CIs.
* This should not modify any state if the Nak is bad
* or if IPCP is in the OPENED state.
+ * Calback from fsm_rconfnakrej - Receive Configure-Nak or Configure-Reject.
*
* Returns:
* 0 - Nak was bad.
u_char cimaxslotindex, cicflag;
u_char citype, cilen, *next;
u_short cishort;
- u_int32_t ciaddr1, ciaddr2, l;
+ u_int32_t ciaddr1, ciaddr2, l, cidnsaddr;
ipcp_options no; /* options we've seen Naks for */
ipcp_options try; /* options to request next time */
code \
}
+#define NAKCIDNS(opt, neg, code) \
+ if (go->neg && \
+ ((cilen = p[1]) == CILEN_ADDR) && \
+ len >= cilen && \
+ p[0] == opt) { \
+ len -= cilen; \
+ INCPTR(2, p); \
+ GETLONG(l, p); \
+ cidnsaddr = htonl(l); \
+ no.neg = 1; \
+ code \
+ }
+
/*
* Accept the peer's idea of {our,his} address, if different
* from our idea, only if the accept_{local,remote} flag is set.
NAKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr, go->old_addrs,
if (go->accept_local && ciaddr1) { /* Do we know our address? */
try.ouraddr = ciaddr1;
- IPCPDEBUG((LOG_INFO, "local IP address %s",
- ip_ntoa(ciaddr1)));
}
if (go->accept_remote && ciaddr2) { /* Does he know his? */
try.hisaddr = ciaddr2;
- IPCPDEBUG((LOG_INFO, "remote IP address %s",
- ip_ntoa(ciaddr2)));
}
);
}
);
+ NAKCIDNS(CI_MS_DNS1, req_dns1,
+ try.dnsaddr[0] = cidnsaddr;
+ );
+
+ NAKCIDNS(CI_MS_DNS2, req_dns2,
+ try.dnsaddr[1] = cidnsaddr;
+ );
+
/*
* There may be remaining CIs, if the peer is requesting negotiation
* on an option that we didn't include in our request packet.
no.neg_vj = 1;
break;
case CI_ADDRS:
- if (go->neg_addr && go->old_addrs || no.old_addrs
+ if ((go->neg_addr && go->old_addrs) || no.old_addrs
|| cilen != CILEN_ADDRS)
goto bad;
try.neg_addr = 1;
p = next;
}
- /* If there is still anything left, this packet is bad. */
- if (len != 0)
- goto bad;
-
/*
* OK, the Nak is good. Now we can update state.
+ * If there are any remaining options, we ignore them.
*/
if (f->state != OPENED)
*go = try;
return 1;
bad:
- IPCPDEBUG((LOG_INFO, "ipcp_nakci: received bad Nak!"));
+ IPCPDEBUG(("ipcp_nakci: received bad Nak!"));
return 0;
}
/*
* ipcp_rejci - Reject some of our CIs.
+ * Callback from fsm_rconfnakrej.
*/
static int
ipcp_rejci(f, p, len)
try.neg = 0; \
}
+#define REJCIDNS(opt, neg, dnsaddr) \
+ if (go->neg && \
+ ((cilen = p[1]) == CILEN_ADDR) && \
+ len >= cilen && \
+ p[0] == opt) { \
+ u_int32_t l; \
+ len -= cilen; \
+ INCPTR(2, p); \
+ GETLONG(l, p); \
+ cilong = htonl(l); \
+ /* Check rejected value. */ \
+ if (cilong != dnsaddr) \
+ goto bad; \
+ try.neg = 0; \
+ }
+
+
REJCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr,
go->old_addrs, go->ouraddr, go->hisaddr);
REJCIVJ(CI_COMPRESSTYPE, neg_vj, go->vj_protocol, go->old_vj,
go->maxslotindex, go->cflag);
+ REJCIDNS(CI_MS_DNS1, req_dns1, go->dnsaddr[0]);
+
+ REJCIDNS(CI_MS_DNS2, req_dns2, go->dnsaddr[1]);
+
/*
* If there are any remaining CIs, then this packet is bad.
*/
return 1;
bad:
- IPCPDEBUG((LOG_INFO, "ipcp_rejci: received bad Reject!"));
+ IPCPDEBUG(("ipcp_rejci: received bad Reject!"));
return 0;
}
/*
* ipcp_reqci - Check the peer's requested CIs and send appropriate response.
+ * Callback from fsm_rconfreq, Receive Configure Request
*
* Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
* appropriately. If reject_if_disagree is non-zero, doesn't return
u_char maxslotindex, cflag;
int d;
- cis_received[f->unit] = 1;
-
/*
* Reset all his options.
*/
if (l < 2 || /* Not enough data for CI header or */
p[1] < 2 || /* CI length too small or */
p[1] > l) { /* CI length too big? */
- IPCPDEBUG((LOG_INFO, "ipcp_reqci: bad CI length!"));
+ IPCPDEBUG(("ipcp_reqci: bad CI length!"));
orc = CONFREJ; /* Reject bad CI */
cilen = l; /* Reject till end of packet */
l = 0; /* Don't loop again */
switch (citype) { /* Check CI type */
case CI_ADDRS:
- IPCPDEBUG((LOG_INFO, "ipcp: received ADDRS "));
if (!ao->neg_addr ||
cilen != CILEN_ADDRS) { /* Check CI length */
orc = CONFREJ; /* Reject CI */
*/
GETLONG(tl, p); /* Parse source address (his) */
ciaddr1 = htonl(tl);
- IPCPDEBUG((LOG_INFO, "(%s:", ip_ntoa(ciaddr1)));
if (ciaddr1 != wo->hisaddr
&& (ciaddr1 == 0 || !wo->accept_remote)) {
orc = CONFNAK;
*/
GETLONG(tl, p); /* Parse desination address (ours) */
ciaddr2 = htonl(tl);
- IPCPDEBUG((LOG_INFO, "%s)", ip_ntoa(ciaddr2)));
if (ciaddr2 != wo->ouraddr) {
if (ciaddr2 == 0 || !wo->accept_local) {
orc = CONFNAK;
break;
case CI_ADDR:
- IPCPDEBUG((LOG_INFO, "ipcp: received ADDR "));
-
if (!ao->neg_addr ||
cilen != CILEN_ADDR) { /* Check CI length */
orc = CONFREJ; /* Reject CI */
*/
GETLONG(tl, p); /* Parse source address (his) */
ciaddr1 = htonl(tl);
- IPCPDEBUG((LOG_INFO, "(%s)", ip_ntoa(ciaddr1)));
if (ciaddr1 != wo->hisaddr
&& (ciaddr1 == 0 || !wo->accept_remote)) {
orc = CONFNAK;
case CI_MS_DNS2:
/* Microsoft primary or secondary DNS request */
d = citype == CI_MS_DNS2;
- IPCPDEBUG((LOG_INFO, "ipcp: received DNS%d Request ", d+1));
/* If we do not have a DNS address then we cannot send it */
if (ao->dnsaddr[d] == 0 ||
orc = CONFNAK;
}
break;
+
+ case CI_MS_WINS1:
+ case CI_MS_WINS2:
+ /* Microsoft primary or secondary WINS request */
+ d = citype == CI_MS_WINS2;
+
+ /* If we do not have a DNS address then we cannot send it */
+ if (ao->winsaddr[d] == 0 ||
+ cilen != CILEN_ADDR) { /* Check CI length */
+ orc = CONFREJ; /* Reject CI */
+ break;
+ }
+ GETLONG(tl, p);
+ if (htonl(tl) != ao->winsaddr[d]) {
+ DECPTR(sizeof(u_int32_t), p);
+ tl = ntohl(ao->winsaddr[d]);
+ PUTLONG(tl, p);
+ orc = CONFNAK;
+ }
+ break;
case CI_COMPRESSTYPE:
- IPCPDEBUG((LOG_INFO, "ipcp: received COMPRESSTYPE "));
if (!ao->neg_vj ||
(cilen != CILEN_VJ && cilen != CILEN_COMPRESS)) {
orc = CONFREJ;
break;
}
GETSHORT(cishort, p);
- IPCPDEBUG((LOG_INFO, "(%d)", cishort));
if (!(cishort == IPCP_VJ_COMP ||
(cishort == IPCP_VJ_COMP_OLD && cilen == CILEN_COMPRESS))) {
orc = CONFREJ;
break;
}
-
endswitch:
- IPCPDEBUG((LOG_INFO, " (%s)\n", CODENAME(orc)));
-
if (orc == CONFACK && /* Good CI */
rc != CONFACK) /* but prior CI wasnt? */
continue; /* Don't send this one */
}
*len = ucp - inp; /* Compute output length */
- IPCPDEBUG((LOG_INFO, "ipcp: returning Configure-%s", CODENAME(rc)));
+ IPCPDEBUG(("ipcp: returning Configure-%s", CODENAME(rc)));
return (rc); /* Return final code */
}
wo->ouraddr = local;
}
}
-
- if (demand && wo->hisaddr == 0) {
- option_error("remote IP address required for demand-dialling\n");
- exit(1);
- }
- if (demand && wo->accept_remote) {
- option_error("ipcp-accept-remote is incompatible with demand\n");
- exit(1);
- }
+ ask_for_local = wo->ouraddr != 0 || !disable_defaultip;
}
{
ipcp_options *wo = &ipcp_wantoptions[u];
+ if (wo->hisaddr == 0) {
+ /* make up an arbitrary address for the peer */
+ wo->hisaddr = htonl(0x0a707070 + ifunit);
+ wo->accept_remote = 1;
+ }
+ if (wo->ouraddr == 0) {
+ /* make up an arbitrary address for us */
+ wo->ouraddr = htonl(0x0a404040 + ifunit);
+ wo->accept_local = 1;
+ ask_for_local = 0; /* don't tell the peer this address */
+ }
if (!sifaddr(u, wo->ouraddr, wo->hisaddr, GetMask(wo->ouraddr)))
return 0;
if (!sifup(u))
if (!sifnpmode(u, PPP_IP, NPMODE_QUEUE))
return 0;
if (wo->default_route)
- if (sifdefaultroute(u, wo->hisaddr))
+ if (sifdefaultroute(u, wo->ouraddr, wo->hisaddr))
default_route_set[u] = 1;
if (wo->proxy_arp)
if (sifproxyarp(u, wo->hisaddr))
proxy_arp_set[u] = 1;
- syslog(LOG_NOTICE, "local IP address %s", ip_ntoa(wo->ouraddr));
- syslog(LOG_NOTICE, "remote IP address %s", ip_ntoa(wo->hisaddr));
+ notice("local IP address %I", wo->ouraddr);
+ notice("remote IP address %I", wo->hisaddr);
return 1;
}
ipcp_options *go = &ipcp_gotoptions[f->unit];
ipcp_options *wo = &ipcp_wantoptions[f->unit];
- np_up(f->unit, PPP_IP);
- IPCPDEBUG((LOG_INFO, "ipcp: up"));
+ IPCPDEBUG(("ipcp: up"));
/*
* We must have a non-zero IP address for both ends of the link.
if (!ho->neg_addr)
ho->hisaddr = wo->hisaddr;
- if (ho->hisaddr == 0) {
- syslog(LOG_ERR, "Could not determine remote IP address");
- ipcp_close(f->unit, "Could not determine remote IP address");
- return;
- }
if (go->ouraddr == 0) {
- syslog(LOG_ERR, "Could not determine local IP address");
+ error("Could not determine local IP address");
ipcp_close(f->unit, "Could not determine local IP address");
return;
}
+ if (ho->hisaddr == 0) {
+ ho->hisaddr = htonl(0x0a404040 + ifunit);
+ warn("Could not determine remote IP address: defaulting to %I",
+ ho->hisaddr);
+ }
+ script_setenv("IPLOCAL", ip_ntoa(go->ouraddr), 0);
+ script_setenv("IPREMOTE", ip_ntoa(ho->hisaddr), 1);
+
+ if (usepeerdns && (go->dnsaddr[0] || go->dnsaddr[1])) {
+ script_setenv("USEPEERDNS", "1", 0);
+ if (go->dnsaddr[0])
+ script_setenv("DNS1", ip_ntoa(go->dnsaddr[0]), 0);
+ if (go->dnsaddr[1])
+ script_setenv("DNS2", ip_ntoa(go->dnsaddr[1]), 0);
+ create_resolv(go->dnsaddr[0], go->dnsaddr[1]);
+ }
/*
* Check that the peer is allowed to use the IP address it wants.
*/
if (!auth_ip_addr(f->unit, ho->hisaddr)) {
- syslog(LOG_ERR, "Peer is not authorized to use remote address %s",
- ip_ntoa(ho->hisaddr));
+ error("Peer is not authorized to use remote address %I", ho->hisaddr);
ipcp_close(f->unit, "Unauthorized remote IP address");
return;
}
*/
if (demand) {
if (go->ouraddr != wo->ouraddr || ho->hisaddr != wo->hisaddr) {
- syslog(LOG_ERR, "Failed to negotiate desired IP addresses");
- ipcp_close(f->unit, "Wrong IP addresses");
- return;
+ ipcp_clear_addrs(f->unit, wo->ouraddr, wo->hisaddr);
+ if (go->ouraddr != wo->ouraddr) {
+ warn("Local IP address changed to %I", go->ouraddr);
+ script_setenv("OLDIPLOCAL", ip_ntoa(wo->ouraddr), 0);
+ wo->ouraddr = go->ouraddr;
+ } else
+ script_unsetenv("OLDIPLOCAL");
+ if (ho->hisaddr != wo->hisaddr) {
+ warn("Remote IP address changed to %I", ho->hisaddr);
+ script_setenv("OLDIPREMOTE", ip_ntoa(wo->hisaddr), 0);
+ wo->hisaddr = ho->hisaddr;
+ } else
+ script_unsetenv("OLDIPREMOTE");
+
+ /* Set the interface to the new addresses */
+ mask = GetMask(go->ouraddr);
+ if (!sifaddr(f->unit, go->ouraddr, ho->hisaddr, mask)) {
+ if (debug)
+ warn("Interface configuration failed");
+ ipcp_close(f->unit, "Interface configuration failed");
+ return;
+ }
+
+ /* assign a default route through the interface if required */
+ if (ipcp_wantoptions[f->unit].default_route)
+ if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr))
+ default_route_set[f->unit] = 1;
+
+ /* Make a proxy ARP entry if requested. */
+ if (ipcp_wantoptions[f->unit].proxy_arp)
+ if (sifproxyarp(f->unit, ho->hisaddr))
+ proxy_arp_set[f->unit] = 1;
+
}
demand_rexmit(PPP_IP);
sifnpmode(f->unit, PPP_IP, NPMODE_PASS);
#if !(defined(SVR4) && (defined(SNI) || defined(__USLC__)))
if (!sifaddr(f->unit, go->ouraddr, ho->hisaddr, mask)) {
- IPCPDEBUG((LOG_WARNING, "sifaddr failed"));
+ if (debug)
+ warn("Interface configuration failed");
ipcp_close(f->unit, "Interface configuration failed");
return;
}
/* bring the interface up for IP */
if (!sifup(f->unit)) {
- IPCPDEBUG((LOG_WARNING, "sifup failed"));
+ if (debug)
+ warn("Interface failed to come up");
ipcp_close(f->unit, "Interface configuration failed");
return;
}
#if (defined(SVR4) && (defined(SNI) || defined(__USLC__)))
if (!sifaddr(f->unit, go->ouraddr, ho->hisaddr, mask)) {
- IPCPDEBUG((LOG_WARNING, "sifaddr failed"));
+ if (debug)
+ warn("Interface configuration failed");
ipcp_close(f->unit, "Interface configuration failed");
return;
}
/* assign a default route through the interface if required */
if (ipcp_wantoptions[f->unit].default_route)
- if (sifdefaultroute(f->unit, ho->hisaddr))
+ if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr))
default_route_set[f->unit] = 1;
/* Make a proxy ARP entry if requested. */
if (sifproxyarp(f->unit, ho->hisaddr))
proxy_arp_set[f->unit] = 1;
- syslog(LOG_NOTICE, "local IP address %s", ip_ntoa(go->ouraddr));
- syslog(LOG_NOTICE, "remote IP address %s", ip_ntoa(ho->hisaddr));
+ ipcp_wantoptions[0].ouraddr = go->ouraddr;
+
+ notice("local IP address %I", go->ouraddr);
+ notice("remote IP address %I", ho->hisaddr);
+ if (go->dnsaddr[0])
+ notice("primary DNS address %I", go->dnsaddr[0]);
+ if (go->dnsaddr[1])
+ notice("secondary DNS address %I", go->dnsaddr[1]);
}
+ np_up(f->unit, PPP_IP);
+ ipcp_is_up = 1;
+
+ notify(ip_up_notifier, 0);
+ if (ip_up_hook)
+ ip_up_hook();
+
/*
* Execute the ip-up script, like this:
* /etc/ppp/ip-up interface tty speed local-IP remote-IP
*/
- ipcp_script(f, _PATH_IPUP);
-
+ if (ipcp_script_state == s_down && ipcp_script_pid == 0) {
+ ipcp_script_state = s_up;
+ ipcp_script(_PATH_IPUP);
+ }
}
ipcp_down(f)
fsm *f;
{
- u_int32_t ouraddr, hisaddr;
-
- IPCPDEBUG((LOG_INFO, "ipcp: down"));
- np_down(f->unit, PPP_IP);
+ IPCPDEBUG(("ipcp: down"));
+ /* XXX a bit IPv4-centric here, we only need to get the stats
+ * before the interface is marked down. */
+ update_link_stats(f->unit);
+ notify(ip_down_notifier, 0);
+ if (ip_down_hook)
+ ip_down_hook();
+ if (ipcp_is_up) {
+ ipcp_is_up = 0;
+ np_down(f->unit, PPP_IP);
+ }
sifvjcomp(f->unit, 0, 0, 0);
/*
*/
if (demand) {
sifnpmode(f->unit, PPP_IP, NPMODE_QUEUE);
-
} else {
- ouraddr = ipcp_gotoptions[f->unit].ouraddr;
- hisaddr = ipcp_hisoptions[f->unit].hisaddr;
- if (proxy_arp_set[f->unit]) {
- cifproxyarp(f->unit, hisaddr);
- proxy_arp_set[f->unit] = 0;
- }
- if (default_route_set[f->unit]) {
- cifdefaultroute(f->unit, hisaddr);
- default_route_set[f->unit] = 0;
- }
+ sifnpmode(f->unit, PPP_IP, NPMODE_DROP);
sifdown(f->unit);
- cifaddr(f->unit, ouraddr, hisaddr);
+ ipcp_clear_addrs(f->unit, ipcp_gotoptions[f->unit].ouraddr,
+ ipcp_hisoptions[f->unit].hisaddr);
}
/* Execute the ip-down script */
- ipcp_script(f, _PATH_IPDOWN);
+ if (ipcp_script_state == s_up && ipcp_script_pid == 0) {
+ ipcp_script_state = s_down;
+ ipcp_script(_PATH_IPDOWN);
+ }
+}
+
+
+/*
+ * ipcp_clear_addrs() - clear the interface addresses, routes,
+ * proxy arp entries, etc.
+ */
+static void
+ipcp_clear_addrs(unit, ouraddr, hisaddr)
+ int unit;
+ u_int32_t ouraddr; /* local address */
+ u_int32_t hisaddr; /* remote address */
+{
+ if (proxy_arp_set[unit]) {
+ cifproxyarp(unit, hisaddr);
+ proxy_arp_set[unit] = 0;
+ }
+ if (default_route_set[unit]) {
+ cifdefaultroute(unit, ouraddr, hisaddr);
+ default_route_set[unit] = 0;
+ }
+ cifaddr(unit, ouraddr, hisaddr);
}
}
+/*
+ * ipcp_script_done - called when the ip-up or ip-down script
+ * has finished.
+ */
+static void
+ipcp_script_done(arg)
+ void *arg;
+{
+ ipcp_script_pid = 0;
+ switch (ipcp_script_state) {
+ case s_up:
+ if (ipcp_fsm[0].state != OPENED) {
+ ipcp_script_state = s_down;
+ ipcp_script(_PATH_IPDOWN);
+ }
+ break;
+ case s_down:
+ if (ipcp_fsm[0].state == OPENED) {
+ ipcp_script_state = s_up;
+ ipcp_script(_PATH_IPUP);
+ }
+ break;
+ }
+}
+
+
/*
* ipcp_script - Execute a script with arguments
* interface-name tty-name speed local-IP remote-IP.
*/
static void
-ipcp_script(f, script)
- fsm *f;
+ipcp_script(script)
char *script;
{
char strspeed[32], strlocal[32], strremote[32];
char *argv[8];
- sprintf(strspeed, "%d", baud_rate);
- strcpy(strlocal, ip_ntoa(ipcp_gotoptions[f->unit].ouraddr));
- strcpy(strremote, ip_ntoa(ipcp_hisoptions[f->unit].hisaddr));
+ slprintf(strspeed, sizeof(strspeed), "%d", baud_rate);
+ slprintf(strlocal, sizeof(strlocal), "%I", ipcp_gotoptions[0].ouraddr);
+ slprintf(strremote, sizeof(strremote), "%I", ipcp_hisoptions[0].hisaddr);
argv[0] = script;
argv[1] = ifname;
argv[5] = strremote;
argv[6] = ipparam;
argv[7] = NULL;
- run_program(script, argv, 0);
+ ipcp_script_pid = run_program(script, argv, 0, ipcp_script_done, NULL);
+}
+
+/*
+ * create_resolv - create the replacement resolv.conf file
+ */
+static void
+create_resolv(peerdns1, peerdns2)
+ u_int32_t peerdns1, peerdns2;
+{
+ FILE *f;
+
+ f = fopen(_PATH_RESOLV, "w");
+ if (f == NULL) {
+ error("Failed to create %s: %m", _PATH_RESOLV);
+ return;
+ }
+
+ if (peerdns1)
+ fprintf(f, "nameserver %s\n", ip_ntoa(peerdns1));
+
+ if (peerdns2)
+ fprintf(f, "nameserver %s\n", ip_ntoa(peerdns2));
+
+ if (ferror(f))
+ error("Write failed to %s: %m", _PATH_RESOLV);
+
+ fclose(f);
}
/*
if (olen == CILEN_ADDRS) {
p += 2;
GETLONG(cilong, p);
- printer(arg, "addrs %s", ip_ntoa(htonl(cilong)));
+ printer(arg, "addrs %I", htonl(cilong));
GETLONG(cilong, p);
- printer(arg, " %s", ip_ntoa(htonl(cilong)));
+ printer(arg, " %I", htonl(cilong));
}
break;
case CI_COMPRESSTYPE:
if (olen == CILEN_ADDR) {
p += 2;
GETLONG(cilong, p);
- printer(arg, "addr %s", ip_ntoa(htonl(cilong)));
+ printer(arg, "addr %I", htonl(cilong));
}
break;
+ case CI_MS_DNS1:
+ case CI_MS_DNS2:
+ p += 2;
+ GETLONG(cilong, p);
+ printer(arg, "ms-dns%d %I", code - CI_MS_DNS1 + 1,
+ htonl(cilong));
+ break;
+ case CI_MS_WINS1:
+ case CI_MS_WINS2:
+ p += 2;
+ GETLONG(cilong, p);
+ printer(arg, "ms-wins %I", htonl(cilong));
+ break;
}
while (p < optend) {
GETCHAR(code, p);
case TERMREQ:
if (len > 0 && *p >= ' ' && *p < 0x7f) {
printer(arg, " ");
- print_string(p, len, printer, arg);
+ print_string((char *)p, len, printer, arg);
p += len;
len = 0;
}
*/
#define IP_HDRLEN 20 /* bytes */
#define IP_OFFMASK 0x1fff
+#ifndef IPPROTO_TCP
#define IPPROTO_TCP 6
+#endif
#define TCP_HDRLEN 20
#define TH_FIN 0x01
projects / ppp.git / blobdiff