ipcp.c File Reference

#include <stdio.h>
#include <string.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 <resolv.h>
#include "pppd.h"
#include "fsm.h"
#include "ipcp.h"
#include "pathnames.h"
#include <rtems/bsdnet/servers.h>

Include dependency graph for ipcp.c:

Macros
#define	RCSID   "$Id$"
#define	CILEN_VOID   2
#define	CILEN_COMPRESS   4 /* min length for compression protocol opt. */
#define	CILEN_VJ   6 /* length for RFC1332 Van-Jacobson opt. */
#define	CILEN_ADDR   6 /* new-style single address option */
#define	CILEN_ADDRS   10 /* old-style dual address option */
#define	CODENAME(x)
#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)
#define	ADDCIVJ(opt, neg, val, old, maxslotindex, cflag)
#define	ADDCIADDR(opt, neg, old, val1, val2)
#define	ADDCIDNS(opt, neg, addr)
#define	ACKCIVJ(opt, neg, val, old, maxslotindex, cflag)
#define	ACKCIADDR(opt, neg, old, val1, val2)
#define	ACKCIDNS(opt, neg, addr)
#define	NAKCIADDR(opt, neg, old, code)
#define	NAKCIVJ(opt, neg, code)
#define	NAKCIDNS(opt, neg, code)
#define	REJCIADDR(opt, neg, old, val1, val2)
#define	REJCIVJ(opt, neg, val, old, maxslot, cflag)
#define	REJCIDNS(opt, neg, dnsaddr)
#define	IP_HDRLEN   20 /* bytes */
#define	IP_OFFMASK   0x1fff
#define	IPPROTO_TCP   6
#define	TCP_HDRLEN   20
#define	TH_FIN   0x01
#define	net_short(x)   (((x)[0] << 8) + (x)[1])
#define	get_iphl(x)   (((unsigned char *)(x))[0] & 0xF)
#define	get_ipoff(x)   net_short((unsigned char *)(x) + 6)
#define	get_ipproto(x)   (((unsigned char *)(x))[9])
#define	get_tcpoff(x)   (((unsigned char *)(x))[12] >> 4)
#define	get_tcpflags(x)   (((unsigned char *)(x))[13])

Functions
char *	ip_ntoa (uint32_t ipaddr)

Variables
ipcp_options	ipcp_wantoptions [NUM_PPP]
ipcp_options	ipcp_gotoptions [NUM_PPP]
ipcp_options	ipcp_allowoptions [NUM_PPP]
ipcp_options	ipcp_hisoptions [NUM_PPP]
bool	disable_defaultip = 0
void(*	ip_up_hook )(void) = NULL
void(*	ip_down_hook )(void) = NULL
fsm	ipcp_fsm [NUM_PPP]
struct protent	ipcp_protent

Macro Definition Documentation

ACKCIADDR

#define ACKCIADDR	(		opt,
			neg,
			old,
			val1,
			val2
	)

Value:

if (neg) { \
        int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
        uint32_t l; \
        if ((len -= addrlen) < 0) \
            goto bad; \
        GETCHAR(citype, p); \
        GETCHAR(cilen, p); \
        if (cilen != addrlen || \
            citype != opt) \
            goto bad; \
        GETLONG(l, p); \
        cilong = htonl(l); \
        if (val1 != cilong) \
            goto bad; \
        if (old) { \
            GETLONG(l, p); \
            cilong = htonl(l); \
            if (val2 != cilong) \
                goto bad; \
        } \
    }

ACKCIDNS

#define ACKCIDNS	(		opt,
			neg,
			addr
	)

Value:

if (neg) { \
        uint32_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; \
    }

ACKCIVJ

#define ACKCIVJ	(		opt,
			neg,
			val,
			old,
			maxslotindex,
			cflag
	)

Value:

if (neg) { \
        int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
        if ((len -= vjlen) < 0) \
            goto bad; \
        GETCHAR(citype, p); \
        GETCHAR(cilen, p); \
        if (cilen != vjlen || \
            citype != opt)  \
            goto bad; \
        GETSHORT(cishort, p); \
        if (cishort != val) \
            goto bad; \
        if (!old) { \
            GETCHAR(cimaxslotindex, p); \
            if (cimaxslotindex != maxslotindex) \
                goto bad; \
            GETCHAR(cicflag, p); \
            if (cicflag != cflag) \
                goto bad; \
        } \
    }

ADDCIADDR

#define ADDCIADDR	(		opt,
			neg,
			old,
			val1,
			val2
	)

Value:

if (neg) { \
        int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
        if (len >= addrlen) { \
            uint32_t l; \
            PUTCHAR(opt, ucp); \
            PUTCHAR(addrlen, ucp); \
            l = ntohl(val1); \
            PUTLONG(l, ucp); \
            if (old) { \
                l = ntohl(val2); \
                PUTLONG(l, ucp); \
            } \
            len -= addrlen; \
        } else \
            neg = 0; \
    }

ADDCIDNS

#define ADDCIDNS	(		opt,
			neg,
			addr
	)

Value:

if (neg) { \
        if (len >= CILEN_ADDR) { \
            uint32_t l; \
            PUTCHAR(opt, ucp); \
            PUTCHAR(CILEN_ADDR, ucp); \
            l = ntohl(addr); \
            PUTLONG(l, ucp); \
            len -= CILEN_ADDR; \
        } else \
            neg = 0; \
    }

ADDCIVJ

#define ADDCIVJ	(		opt,
			neg,
			val,
			old,
			maxslotindex,
			cflag
	)

Value:

if (neg) { \
        int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
        if (len >= vjlen) { \
            PUTCHAR(opt, ucp); \
            PUTCHAR(vjlen, ucp); \
            PUTSHORT(val, ucp); \
            if (!old) { \
                PUTCHAR(maxslotindex, ucp); \
                PUTCHAR(cflag, ucp); \
            } \
            len -= vjlen; \
        } else \
            neg = 0; \
    }

CODENAME

#define CODENAME

(

x

)

Value:

((x) == CONFACK ? "ACK" : \
                         (x) == CONFNAK ? "NAK" : "REJ")

NAKCIADDR

#define NAKCIADDR	(		opt,
			neg,
			old,
			code
	)

Value:

if (go->neg && \
        len >= (cilen = (old? CILEN_ADDRS: CILEN_ADDR)) && \
        p[1] == cilen && \
        p[0] == opt) { \
        len -= cilen; \
        INCPTR(2, p); \
        GETLONG(l, p); \
        ciaddr1 = htonl(l); \
        if (old) { \
            GETLONG(l, p); \
            ciaddr2 = htonl(l); \
            no.old_addrs = 1; \
        } else \
            ciaddr2 = 0; \
        no.neg = 1; \
        code \
    }

NAKCIDNS

#define NAKCIDNS	(		opt,
			neg,
			code
	)

Value:

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 \
    }

NAKCIVJ

#define NAKCIVJ	(		opt,
			neg,
			code
	)

Value:

if (go->neg && \
        ((cilen = p[1]) == CILEN_COMPRESS || cilen == CILEN_VJ) && \
        len >= cilen && \
        p[0] == opt) { \
        len -= cilen; \
        INCPTR(2, p); \
        GETSHORT(cishort, p); \
        no.neg = 1; \
        code \
    }

REJCIADDR

#define REJCIADDR	(		opt,
			neg,
			old,
			val1,
			val2
	)

Value:

if (go->neg && \
        len >= (cilen = old? CILEN_ADDRS: CILEN_ADDR) && \
        p[1] == cilen && \
        p[0] == opt) { \
        uint32_t l; \
        len -= cilen; \
        INCPTR(2, p); \
        GETLONG(l, p); \
        cilong = htonl(l); \
        /* Check rejected value. */ \
        if (cilong != val1) \
            goto bad; \
        if (old) { \
            GETLONG(l, p); \
            cilong = htonl(l); \
            /* Check rejected value. */ \
            if (cilong != val2) \
                goto bad; \
        } \
        try.neg = 0; \
    }

REJCIDNS

#define REJCIDNS	(		opt,
			neg,
			dnsaddr
	)

Value:

if (go->neg && \
        ((cilen = p[1]) == CILEN_ADDR) && \
        len >= cilen && \
        p[0] == opt) { \
        uint32_t l; \
        len -= cilen; \
        INCPTR(2, p); \
        GETLONG(l, p); \
        cilong = htonl(l); \
        /* Check rejected value. */ \
        if (cilong != dnsaddr) \
            goto bad; \
        try.neg = 0; \
    }

REJCIVJ

#define REJCIVJ	(		opt,
			neg,
			val,
			old,
			maxslot,
			cflag
	)

Value:

if (go->neg && \
        p[1] == (old? CILEN_COMPRESS : CILEN_VJ) && \
        len >= p[1] && \
        p[0] == opt) { \
        len -= p[1]; \
        INCPTR(2, p); \
        GETSHORT(cishort, p); \
        /* Check rejected value. */  \
        if (cishort != val) \
            goto bad; \
        if (!old) { \
           GETCHAR(cimaxslotindex, p); \
           if (cimaxslotindex != maxslot) \
             goto bad; \
           GETCHAR(ciflag, p); \
           if (ciflag != cflag) \
             goto bad; \
        } \
        try.neg = 0; \
     }

Variable Documentation

ipcp_protent

struct protent ipcp_protent

Initial value:

= {
    PPP_IPCP,
    ipcp_init,
    ipcp_input,
    ipcp_protrej,
    ipcp_lowerup,
    ipcp_lowerdown,
    ipcp_open,
    ipcp_close,
    ipcp_printpkt,
    NULL,
    1,
    "IPCP",
    "IP",
    ipcp_option_list,
    ip_check_options,
    ip_demand_conf,
    ip_active_pkt
}