// L2TPNS PPP Stuff
-char const *cvs_id_ppp = "$Id: ppp.c,v 1.33 2004/11/29 02:17:18 bodea Exp $";
+char const *cvs_id_ppp = "$Id: ppp.c,v 1.39 2004/12/16 08:49:53 bodea Exp $";
#include <stdio.h>
#include <string.h>
extern radiust *radius;
extern int tunfd;
extern char hostname[];
-extern u32 eth_tx;
+extern uint32_t eth_tx;
extern time_t time_now;
extern configt *config;
static void initccp(tunnelidt t, sessionidt s);
// Process PAP messages
-void processpap(tunnelidt t, sessionidt s, u8 *p, u16 l)
+void processpap(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l)
{
char user[129];
char pass[129];
- u16 hl;
+ uint16_t hl;
CSTAT(call_processpap);
return ;
}
- if ((hl = ntohs(*(u16 *) (p + 2))) > l)
+ if ((hl = ntohs(*(uint16_t *) (p + 2))) > l)
{
LOG(1, s, t, "Length mismatch PAP %u/%u\n", hl, l);
STAT(tunnel_rx_errors);
}
{
- u8 *b = p;
+ uint8_t *b = p;
b += 4;
if (*b && *b < sizeof(user))
memcpy(user, b + 1, *b);
if (session[s].ip || !session[s].radius)
{
// respond now, either no RADIUS available or already authenticated
- u8 b[MAXCONTROL];
- u8 id = p[1];
- u8 *p = makeppp(b, sizeof(b), 0, 0, t, s, PPPPAP);
+ uint8_t b[MAXCONTROL];
+ uint8_t id = p[1];
+ uint8_t *p = makeppp(b, sizeof(b), 0, 0, t, s, PPPPAP);
if (!p) return;
if (session[s].ip)
- *p = 2; // ACK
+ *p = 2; // ACK
else
- *p = 3; // cant authorise
+ *p = 3; // cant authorise
p[1] = id;
- *(u16 *) (p + 2) = htons(5); // length
- p[4] = 0; // no message
+ *(uint16_t *) (p + 2) = htons(5); // length
+ p[4] = 0; // no message
if (session[s].ip)
{
LOG(3, s, t, "Already an IP allocated: %s (%d)\n",
else
{
// set up RADIUS request
- u16 r = session[s].radius;
+ uint16_t r = session[s].radius;
// Run PRE_AUTH plugins
struct param_pre_auth packet = { &tunnel[t], &session[s], strdup(user), strdup(pass), PPPPAP, 1 };
}
// Process CHAP messages
-void processchap(tunnelidt t, sessionidt s, u8 *p, u16 l)
+void processchap(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l)
{
- u16 r;
- u16 hl;
+ uint16_t r;
+ uint16_t hl;
CSTAT(call_processchap);
return ;
}
- if ((hl = ntohs(*(u16 *) (p + 2))) > l)
+ if ((hl = ntohs(*(uint16_t *) (p + 2))) > l)
{
LOG(1, s, t, "Length mismatch CHAP %u/%u\n", hl, l);
STAT(tunnel_rx_errors);
"IdentRequest",
};
-static void dumplcp(u8 *p, int l)
+static void dumplcp(uint8_t *p, int l)
{
int x = l - 4;
- u8 *o = (p + 4);
+ uint8_t *o = (p + 4);
LOG_HEX(5, "PPP LCP Packet", p, l);
- LOG(4, 0, 0, "PPP LCP Packet type %d (%s len %d)\n", *p, ppp_lcp_types[(int)*p], ntohs( ((u16 *) p)[1]) );
+ LOG(4, 0, 0, "PPP LCP Packet type %d (%s len %d)\n", *p, ppp_lcp_types[(int)*p], ntohs( ((uint16_t *) p)[1]) );
LOG(4, 0, 0, "Length: %d\n", l);
if (*p != ConfigReq && *p != ConfigRej && *p != ConfigAck)
return;
{
case 1: // Maximum-Receive-Unit
if (length == 4)
- LOG(4, 0, 0, " %s %d\n", lcp_types[type], ntohs(*(u16 *)(o + 2)));
+ LOG(4, 0, 0, " %s %d\n", lcp_types[type], ntohs(*(uint16_t *)(o + 2)));
else
LOG(4, 0, 0, " %s odd length %d\n", lcp_types[type], length);
break;
case 2: // Async-Control-Character-Map
if (length == 6)
{
- u32 asyncmap = ntohl(*(u32 *)(o + 2));
+ uint32_t asyncmap = ntohl(*(uint32_t *)(o + 2));
LOG(4, 0, 0, " %s %x\n", lcp_types[type], asyncmap);
}
else
case 3: // Authentication-Protocol
if (length == 4)
{
- int proto = ntohs(*(u16 *)(o + 2));
+ int proto = ntohs(*(uint16_t *)(o + 2));
LOG(4, 0, 0, " %s 0x%x (%s)\n", lcp_types[type], proto,
proto == PPPCHAP ? "CHAP" :
proto == PPPPAP ? "PAP" : "UNKNOWN");
break;
case 4: // Quality-Protocol
{
- u32 qp = ntohl(*(u32 *)(o + 2));
+ uint32_t qp = ntohl(*(uint32_t *)(o + 2));
LOG(4, 0, 0, " %s %x\n", lcp_types[type], qp);
}
break;
case 5: // Magic-Number
if (length == 6)
{
- u32 magicno = ntohl(*(u32 *)(o + 2));
+ uint32_t magicno = ntohl(*(uint32_t *)(o + 2));
LOG(4, 0, 0, " %s %x\n", lcp_types[type], magicno);
}
else
}
// Process LCP messages
-void processlcp(tunnelidt t, sessionidt s, u8 *p, u16 l)
+void processlcp(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l)
{
- u8 b[MAXCONTROL];
- u8 *q = NULL;
- u32 magicno = 0;
- u16 hl;
+ uint8_t b[MAXCONTROL];
+ uint8_t *q = NULL;
+ uint32_t magicno = 0;
+ uint16_t hl;
CSTAT(call_processlcp);
return ;
}
- if ((hl = ntohs(*(u16 *) (p + 2))) > l)
+ if ((hl = ntohs(*(uint16_t *) (p + 2))) > l)
{
LOG(1, s, t, "Length mismatch LCP %u/%u\n", hl, l);
STAT(tunnel_rx_errors);
else if (*p == ConfigReq)
{
int x = l - 4;
- u8 *o = (p + 4);
- u8 response = 0;
+ uint8_t *o = (p + 4);
+ uint8_t *response = 0;
LOG(3, s, t, "LCP: ConfigReq (%d bytes)...\n", l);
if (config->debug > 3) dumplcp(p, l);
{
int type = o[0];
int length = o[1];
+
if (length == 0 || type == 0 || x < length) break;
switch (type)
{
case 1: // Maximum-Receive-Unit
- session[s].mru = ntohs(*(u16 *)(o + 2));
+ session[s].mru = ntohs(*(uint16_t *)(o + 2));
break;
case 2: // Async-Control-Character-Map
- if (!ntohl(*(u32 *)(o + 2))) // all bits zero is OK
+ if (!ntohl(*(uint32_t *)(o + 2))) // all bits zero is OK
break;
- if (response && response != ConfigNak) // rej already queued
+ if (response && *response != ConfigNak) // rej already queued
break;
LOG(2, s, t, " Remote requesting asyncmap. Rejecting.\n");
if (!response)
{
- q = makeppp(b, sizeof(b), NULL, 0, t, s, PPPLCP);
+ q = response = makeppp(b, sizeof(b), p, 2, t, s, PPPLCP);
if (!q) break;
- response = *q++ = ConfigNak;
+ *q = ConfigNak;
+ q += 4;
}
if ((q - b + 11) > sizeof(b))
*q++ = 6;
memset(q, 0, 4); // asyncmap 0
q += 4;
+ *((uint16_t *) (response + 2)) = htons(q - response); // LCP header length
break;
case 3: // Authentication-Protocol
{
- int proto = ntohs(*(u16 *)(o + 2));
+ int proto = ntohs(*(uint16_t *)(o + 2));
char proto_name[] = "0x0000";
if (proto == PPPPAP)
break;
- if (response && response != ConfigNak) // rej already queued
+ if (response && *response != ConfigNak) // rej already queued
break;
if (proto == PPPCHAP)
if (!response)
{
- q = makeppp(b, sizeof(b), NULL, 0, t, s, PPPLCP);
+ q = response = makeppp(b, sizeof(b), p, 2, t, s, PPPLCP);
if (!q) break;
- response = *q++ = ConfigNak;
+ *q = ConfigNak;
+ q += 4;
}
if ((q - b + length) > sizeof(b))
}
memcpy(q, o, length);
- *(u16 *)(q += 2) = htons(PPPPAP); // NAK -> Use PAP instead
+ *(uint16_t *)(q += 2) = htons(PPPPAP); // NAK -> Use PAP instead
q += length;
+ *((uint16_t *) (response + 2)) = htons(q - response);
}
break;
case 5: // Magic-Number
- magicno = ntohl(*(u32 *)(o + 2));
+ magicno = ntohl(*(uint32_t *)(o + 2));
break;
case 4: // Quality-Protocol
default: // Reject any unknown options
LOG(2, s, t, " Rejecting PPP LCP Option type %d\n", type);
- if (!response || response != ConfigRej) // drop nak in favour of rej
+ if (!response || *response != ConfigRej) // drop nak in favour of rej
{
- q = makeppp(b, sizeof(b), NULL, 0, t, s, PPPLCP);
- if (!q) return;
- response = *q++ = ConfigRej;
+ q = response = makeppp(b, sizeof(b), p, 2, t, s, PPPLCP);
+ if (!q) break;
+ *q = ConfigRej;
+ q += 4;
}
if ((q - b + length) > sizeof(b))
memcpy(q, o, length);
q += length;
+ *((uint16_t *) (response + 2)) = htons(q - response); // LCP header length
}
x -= length;
o += length;
if (!response)
{
// Send back a ConfigAck
- q = makeppp(b, sizeof(b), p, l, t, s, PPPLCP);
+ q = response = makeppp(b, sizeof(b), p, l, t, s, PPPLCP);
if (!q) return;
- response = *q = ConfigAck;
+ *q = ConfigAck;
}
- LOG(3, s, t, "Sending %s\n", ppp_lcp_types[response]);
+ LOG(3, s, t, "Sending %s\n", ppp_lcp_types[*response]);
tunnelsend(b, l + (q - b), t);
if (!(session[s].flags & SF_LCP_ACKED))
{
LOG(5, s, t, "LCP: Received EchoReq. Sending EchoReply\n");
*p = EchoReply; // reply
- *(u32 *) (p + 4) = htonl(session[s].magic); // our magic number
+ *(uint32_t *) (p + 4) = htonl(session[s].magic); // our magic number
q = makeppp(b, sizeof(b), p, l, t, s, PPPLCP);
if (!q) return;
tunnelsend(b, l + (q - b), t); // send it
}
// find a PPP option, returns point to option, or 0 if not found
-static u8 *findppp(u8 *b, u8 mtype)
+static uint8_t *findppp(uint8_t *b, uint8_t mtype)
{
- u16 l = ntohs(*(u16 *) (b + 2));
+ uint16_t l = ntohs(*(uint16_t *) (b + 2));
if (l < 4)
return 0;
b += 4;
}
// Process IPCP messages
-void processipcp(tunnelidt t, sessionidt s, u8 *p, u16 l)
+void processipcp(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l)
{
- u16 hl;
+ uint16_t hl;
CSTAT(call_processipcp);
return ;
}
- if ((hl = ntohs(*(u16 *) (p + 2))) > l)
+ if ((hl = ntohs(*(uint16_t *) (p + 2))) > l)
{
LOG(1, s, t, "Length mismatch IPCP %u/%u\n", hl, l);
STAT(tunnel_rx_errors);
if (*p == ConfigAck)
{
// happy with our IPCP
- u16 r = session[s].radius;
+ uint16_t r = session[s].radius;
if ((!r || radius[r].state == RADIUSIPCP) && !session[s].walled_garden)
{
if (!r)
}
// form a config reply quoting the IP in the session
{
- u8 b[MAXCONTROL];
- u8 *i,
- *q;
+ uint8_t b[MAXCONTROL];
+ uint8_t *i, *q;
q = p + 4;
i = p + l;
if (q < i)
{
// reject
- u16 n = 4;
+ uint16_t n = 4;
i = p + l;
if (!(q = makeppp(b, sizeof(b), p, l, t, s, PPPIPCP)))
return;
}
p += p[1];
}
- *(u16 *) (q + 2) = htons(n);
+ *(uint16_t *) (q + 2) = htons(n);
LOG(4, s, t, "Sending ConfigRej\n");
tunnelsend(b, n + (q - b), t); // send it
}
*p = ConfigAck;
if ((i = findppp(p, 0x81))) // Primary DNS address
{
- if (*(u32 *) (i + 2) != htonl(session[s].dns1))
+ if (*(uint32_t *) (i + 2) != htonl(session[s].dns1))
{
- *(u32 *) (i + 2) = htonl(session[s].dns1);
+ *(uint32_t *) (i + 2) = htonl(session[s].dns1);
*p = ConfigNak;
- LOG(5, s, t, " DNS1 = %s\n", fmtaddr(session[s].dns1, 0));
+ LOG(5, s, t, " DNS1 = %s\n",
+ fmtaddr(htonl(session[s].dns1), 0));
}
}
if ((i = findppp(p, 0x83))) // Secondary DNS address (TBA, is it)
{
- if (*(u32 *) (i + 2) != htonl(session[s].dns2))
+ if (*(uint32_t *) (i + 2) != htonl(session[s].dns2))
{
- *(u32 *) (i + 2) = htonl(session[s].dns2);
+ *(uint32_t *) (i + 2) = htonl(session[s].dns2);
*p = ConfigNak;
- LOG(5, s, t, " DNS2 = %s\n", fmtaddr(session[s].dns2, 0));
+ LOG(5, s, t, " DNS2 = %s\n",
+ fmtaddr(htonl(session[s].dns2), 0));
}
}
i = findppp(p, 3); // IP address
STAT(tunnel_rx_errors);
return ;
}
- if (*(u32 *) (i + 2) != htonl(session[s].ip))
+ if (*(uint32_t *) (i + 2) != htonl(session[s].ip))
{
- *(u32 *) (i + 2) = htonl(session[s].ip);
+ *(uint32_t *) (i + 2) = htonl(session[s].ip);
*p = ConfigNak;
LOG(4, s, t, " No, a ConfigNak, client is requesting IP - sending %s\n",
fmtaddr(htonl(session[s].ip), 0));
//
// This MUST be called with at least 4 byte behind 'p'.
// (i.e. this routine writes to p[-4]).
-void processipin(tunnelidt t, sessionidt s, u8 *p, u16 l)
+void processipin(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l)
{
- ipt ip;
+ in_addr_t ip;
CSTAT(call_processipin);
LOG_HEX(5, "IP", p, l);
- ip = ntohl(*(u32 *)(p + 12));
+ ip = ntohl(*(uint32_t *)(p + 12));
if (l > MAXETHER)
{
// Add on the tun header
p -= 4;
- *(u32 *)p = htonl(0x00000800);
+ *(uint32_t *) p = htonl(0x00000800);
l += 4;
if (session[s].tbf_in && !config->cluster_iam_master) { // Are we throttled and a slave?
// Helper routine for the TBF filters.
// Used to send queued data in from the user.
//
-void send_ipin(sessionidt s, u8 *buf, int len)
+void send_ipin(sessionidt s, uint8_t *buf, int len)
{
LOG_HEX(5, "IP in throttled", buf, len);
// Process CCP messages
-void processccp(tunnelidt t, sessionidt s, u8 *p, u16 l)
+void processccp(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l)
{
- u8 b[MAXCONTROL];
- u8 *q;
+ uint8_t b[MAXCONTROL];
+ uint8_t *q;
CSTAT(call_processccp);
// send a CHAP PP packet
void sendchap(tunnelidt t, sessionidt s)
{
- u8 b[MAXCONTROL];
- u16 r = session[s].radius;
- u8 *q;
+ uint8_t b[MAXCONTROL];
+ uint16_t r = session[s].radius;
+ uint8_t *q;
CSTAT(call_sendchap);
q[4] = 16; // length
memcpy(q + 5, radius[r].auth, 16); // challenge
strcpy(q + 21, hostname); // our name
- *(u16 *) (q + 2) = htons(strlen(hostname) + 21); // length
+ *(uint16_t *) (q + 2) = htons(strlen(hostname) + 21); // length
tunnelsend(b, strlen(hostname) + 21 + (q - b), t); // send it
}
// fill in a L2TP message with a PPP frame,
// copies existing PPP message and changes magic number if seen
// returns start of PPP frame
-u8 *makeppp(u8 *b, int size, u8 *p, int l, tunnelidt t, sessionidt s, u16 mtype)
+uint8_t *makeppp(uint8_t *b, int size, uint8_t *p, int l, tunnelidt t, sessionidt s, uint16_t mtype)
{
if (size < 12) // Need more space than this!!
{
return NULL;
}
- *(u16 *) (b + 0) = htons(0x0002); // L2TP with no options
- *(u16 *) (b + 2) = htons(tunnel[t].far); // tunnel
- *(u16 *) (b + 4) = htons(session[s].far); // session
+ *(uint16_t *) (b + 0) = htons(0x0002); // L2TP with no options
+ *(uint16_t *) (b + 2) = htons(tunnel[t].far); // tunnel
+ *(uint16_t *) (b + 4) = htons(session[s].far); // session
b += 6;
if (mtype == PPPLCP || !(session[s].l2tp_flags & SESSIONACFC))
{
- *(u16 *) b = htons(0xFF03); // HDLC header
+ *(uint16_t *) b = htons(0xFF03); // HDLC header
b += 2;
}
if (mtype < 0x100 && session[s].l2tp_flags & SESSIONPFC)
*b++ = mtype;
else
{
- *(u16 *) b = htons(mtype);
+ *(uint16_t *) b = htons(mtype);
b += 2;
}
LOG(4, s, t, "Sending LCP ConfigReq for PAP\n");
*q = ConfigReq;
- *(u8 *)(q + 1) = (time_now % 255) + 1; // ID
- *(u16 *)(q + 2) = htons(14); // Length
- *(u8 *)(q + 4) = 5;
- *(u8 *)(q + 5) = 6;
- *(u32 *)(q + 6) = htonl(session[s].magic);
- *(u8 *)(q + 10) = 3;
- *(u8 *)(q + 11) = 4;
- *(u16 *)(q + 12) = htons(PPPPAP); // PAP
+ *(uint8_t *)(q + 1) = (time_now % 255) + 1; // ID
+ *(uint16_t *)(q + 2) = htons(14); // Length
+ *(uint8_t *)(q + 4) = 5;
+ *(uint8_t *)(q + 5) = 6;
+ *(uint32_t *)(q + 6) = htonl(session[s].magic);
+ *(uint8_t *)(q + 10) = 3;
+ *(uint8_t *)(q + 11) = 4;
+ *(uint16_t *)(q + 12) = htons(PPPPAP); // PAP
LOG_HEX(5, "PPPLCP", q, 14);
tunnelsend(b, (q - b) + 14, t);
LOG(4, s, t, "Sending CCP ConfigReq for no compression\n");
*q = ConfigReq;
- *(u8 *)(q + 1) = (time_now % 255) + 1; // ID
- *(u16 *)(q + 2) = htons(4); // Length
+ *(uint8_t *)(q + 1) = (time_now % 255) + 1; // ID
+ *(uint16_t *)(q + 2) = htons(4); // Length
LOG_HEX(5, "PPPCCP", q, 4);
tunnelsend(b, (q - b) + 4 , t);
projects / l2tpns.git / blobdiff