#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/mbuf.h>
#include <sys/module.h>
#include <sys/signalvar.h>
#include <sys/sysctl.h>
#include <sys/socketvar.h>

Include dependency graph for accf_dns.c:

Data Structures
struct	packet

Macros
#define	ACCEPT_FILTER_MOD

#define	DNS_OK 0

#define	DNS_WAIT -1

#define	DNS_RUN -2

#define	GET8(p, val)

#define	GET16(p, val)

Functions
static int	sohasdns (struct socket so, void arg, int waitflag)

	ACCEPT_FILTER_DEFINE (accf_dns, "dnsready", sohasdns, NULL, NULL, 1)

static int	skippacket (struct sockbuf *sb)

Macro Definition Documentation

◆ ACCEPT_FILTER_MOD

#define ACCEPT_FILTER_MOD

Definition at line 31 of file accf_dns.c.

◆ DNS_OK

#define DNS_OK 0

Definition at line 54 of file accf_dns.c.

◆ DNS_RUN

#define DNS_RUN -2

Definition at line 56 of file accf_dns.c.

◆ DNS_WAIT

#define DNS_WAIT -1

Definition at line 55 of file accf_dns.c.

◆ GET16

#define GET16	(	p,
		val
	)

Value:

        do { \
        unsigned int v0, v1; \
        GET8(p, v0); \
        GET8(p, v1); \
        val = v0 * 0x100 + v1; \
        } while (0)

Definition at line 95 of file accf_dns.c.

◆ GET8

#define GET8	(	p,
		val
	)

Value:

        do { \
        if (p->offset < p->moff) \
                return DNS_RUN; \
        while (p->offset >= p->moff + p->m->m_len) { \
                p->moff += p->m->m_len; \
                p->m = p->m->m_next; \
                if (p->m == NULL) { \
                        p->m = p->n; \
                        p->n = p->m->m_nextpkt; \
                } \
                if (p->m == NULL) \
                        return DNS_WAIT; \
        } \
        val = *(mtod(p->m, unsigned char *) + (p->offset - p->moff)); \
        p->offset++; \
        } while (0)

Definition at line 78 of file accf_dns.c.

Function Documentation

◆ ACCEPT_FILTER_DEFINE()

ACCEPT_FILTER_DEFINE	(	accf_dns	,
		"dnsready"	,
		sohasdns	,
		NULL	,
		NULL	,
		1
	)

◆ skippacket()

static int skippacket ( struct sockbuf * sb )

static

Definition at line 103 of file accf_dns.c.

References DNS_OK, DNS_WAIT, GET16, packet::len, packet::m, packet::moff, packet::n, and packet::offset.

Referenced by sohasdns().

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◆ sohasdns()

static int sohasdns	(	struct socket *	so,
		void *	arg,
		int	waitflag
	)

static

Definition at line 62 of file accf_dns.c.

References DNS_WAIT, and skippacket().

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Data Structures

Macros

Functions