efeb8bffe3
Convert ipfilter userland function declarations from K&R to ANSI. This syncs our function declarations with NetBSD hg commit 75edcd7552a0 (apply our changes). Though not copied from NetBSD, this change was partially inspired by NetBSD's work and inspired by style(9). Reviewed by: glebius (for #network) MFC after: 1 month Differential Revision: https://reviews.freebsd.org/D33595
139 lines
2.9 KiB
C
139 lines
2.9 KiB
C
/* $FreeBSD$ */
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/*
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* resend.c (C) 1995-1998 Darren Reed
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*
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* See the IPFILTER.LICENCE file for details on licencing.
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*
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*/
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#if !defined(lint)
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static const char sccsid[] = "@(#)resend.c 1.3 1/11/96 (C)1995 Darren Reed";
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static const char rcsid[] = "@(#)$Id$";
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#endif
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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# include <netinet/ip_var.h>
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# include <netinet/if_ether.h>
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#include <stdio.h>
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#include <netdb.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "ipsend.h"
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extern int opts;
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void dumppacket(ip_t *);
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void
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dumppacket(ip_t *ip)
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{
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tcphdr_t *t;
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int i, j;
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t = (tcphdr_t *)((char *)ip + (IP_HL(ip) << 2));
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if (ip->ip_tos)
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printf("tos %#x ", ip->ip_tos);
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if (ip->ip_off & 0x3fff)
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printf("frag @%#x ", (ip->ip_off & 0x1fff) << 3);
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printf("len %d id %d ", ip->ip_len, ip->ip_id);
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printf("ttl %d p %d src %s", ip->ip_ttl, ip->ip_p,
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inet_ntoa(ip->ip_src));
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if (ip->ip_p == IPPROTO_TCP || ip->ip_p == IPPROTO_UDP)
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printf(",%d", t->th_sport);
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printf(" dst %s", inet_ntoa(ip->ip_dst));
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if (ip->ip_p == IPPROTO_TCP || ip->ip_p == IPPROTO_UDP)
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printf(",%d", t->th_dport);
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if (ip->ip_p == IPPROTO_TCP) {
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printf(" seq %lu:%lu flags ",
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(u_long)t->th_seq, (u_long)t->th_ack);
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for (j = 0, i = 1; i < 256; i *= 2, j++)
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if (t->th_flags & i)
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printf("%c", "FSRPAU--"[j]);
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}
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putchar('\n');
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}
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int
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ip_resend(char *dev, int mtu, struct ipread *r, struct in_addr gwip,
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char *datain)
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{
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ether_header_t *eh;
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char dhost[6];
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ip_t *ip;
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int fd, wfd = initdevice(dev, 5), len, i;
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mb_t mb;
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if (wfd == -1)
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return -1;
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if (datain)
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fd = (*r->r_open)(datain);
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else
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fd = (*r->r_open)("-");
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if (fd < 0)
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exit(-1);
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ip = (struct ip *)mb.mb_buf;
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eh = (ether_header_t *)malloc(sizeof(*eh));
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if(!eh)
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{
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perror("malloc failed");
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return -2;
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}
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bzero((char *) &eh->ether_shost, sizeof(eh->ether_shost));
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if (gwip.s_addr && (arp((char *)&gwip, dhost) == -1))
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{
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perror("arp");
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free(eh);
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return -2;
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}
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while ((i = (*r->r_readip)(&mb, NULL, NULL)) > 0)
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{
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if (!(opts & OPT_RAW)) {
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len = ntohs(ip->ip_len);
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eh = (ether_header_t *)realloc((char *)eh, sizeof(*eh) + len);
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eh->ether_type = htons((u_short)ETHERTYPE_IP);
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if (!gwip.s_addr) {
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if (arp((char *)&gwip,
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(char *) &eh->ether_dhost) == -1) {
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perror("arp");
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continue;
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}
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} else
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bcopy(dhost, (char *) &eh->ether_dhost,
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sizeof(dhost));
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if (!ip->ip_sum)
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ip->ip_sum = chksum((u_short *)ip,
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IP_HL(ip) << 2);
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bcopy(ip, (char *)(eh + 1), len);
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len += sizeof(*eh);
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dumppacket(ip);
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} else {
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eh = (ether_header_t *)mb.mb_buf;
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len = i;
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}
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if (sendip(wfd, (char *)eh, len) == -1)
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{
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perror("send_packet");
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break;
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}
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}
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(*r->r_close)();
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free(eh);
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return 0;
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}
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