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ip.c (24583) ip.c (31183)
1/*
1/*
2 * ip.c (C) 1995 Darren Reed
2 * ip.c (C) 1995-1997 Darren Reed
3 *
3 *
4 * The author provides this program as-is, with no gaurantee for its
5 * suitability for any specific purpose. The author takes no responsibility
6 * for the misuse/abuse of this program and provides it for the sole purpose
7 * of testing packet filter policies. This file maybe distributed freely
8 * providing it is not modified and that this notice remains in tact.
4 * Redistribution and use in source and binary forms are permitted
5 * provided that this notice is preserved and due credit is given
6 * to the original author and the contributors.
9 */
7 */
10#if !defined(lint) && defined(LIBC_SCCS)
11static char sccsid[] = "%W% %G% (C)1995";
8#if !defined(lint)
9static const char sccsid[] = "%W% %G% (C)1995";
10static const char rcsid[] = "@(#)$Id: ip.c,v 2.0.2.11 1997/10/23 11:42:44 darrenr Exp $";
12#endif
13#include <errno.h>
14#include <stdio.h>
15#include <stdlib.h>
16#include <unistd.h>
17#include <string.h>
18#include <sys/types.h>
19#include <netinet/in_systm.h>
20#include <sys/socket.h>
21#include <net/if.h>
22#include <netinet/in.h>
23#include <netinet/ip.h>
24#include <netinet/tcp.h>
25#include <netinet/udp.h>
26#include <netinet/ip_icmp.h>
11#endif
12#include <errno.h>
13#include <stdio.h>
14#include <stdlib.h>
15#include <unistd.h>
16#include <string.h>
17#include <sys/types.h>
18#include <netinet/in_systm.h>
19#include <sys/socket.h>
20#include <net/if.h>
21#include <netinet/in.h>
22#include <netinet/ip.h>
23#include <netinet/tcp.h>
24#include <netinet/udp.h>
25#include <netinet/ip_icmp.h>
26#include <sys/param.h>
27#ifndef linux
27#ifndef linux
28#include
29#include
28# include <netinet/if_ether.h>
29# include <netinet/ip_var.h>
30# if __FreeBSD_version >= 300000
31# include <net/if_var.h>
32# endif
30#endif
31#include "ipsend.h"
32
33
34static char *ipbuf = NULL, *ethbuf = NULL;
35
36
37u_short chksum(buf,len)

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62
63 if (!ethbuf)
64 ethbuf = (char *)calloc(1, 65536+1024);
65 s = ethbuf;
66 eh = (ether_header_t *)s;
67
68 bcopy((char *)buf, s + sizeof(*eh), len);
69 if (gwip.s_addr == last_gw.s_addr)
33#endif
34#include "ipsend.h"
35
36
37static char *ipbuf = NULL, *ethbuf = NULL;
38
39
40u_short chksum(buf,len)

--- 24 unchanged lines hidden (view full) ---

65
66 if (!ethbuf)
67 ethbuf = (char *)calloc(1, 65536+1024);
68 s = ethbuf;
69 eh = (ether_header_t *)s;
70
71 bcopy((char *)buf, s + sizeof(*eh), len);
72 if (gwip.s_addr == last_gw.s_addr)
70 bcopy(last_arp, (char *)&eh->ether_dhost, 6);
71 else if (arp((char *)&gwip, (char *)&eh->ether_dhost) == -1)
73 bcopy(last_arp, (char *)A_A eh->ether_dhost, 6);
74 else if (arp((char *)&gwip, (char *)A_A eh->ether_dhost) == -1)
72 {
73 perror("arp");
74 return -2;
75 }
75 {
76 perror("arp");
77 return -2;
78 }
76 eh->ether_type = ETHERTYPE_IP;
79 eh->ether_type = htons(ETHERTYPE_IP);
77 last_gw.s_addr = gwip.s_addr;
78 err = sendip(nfd, s, sizeof(*eh) + len);
79 return err;
80}
81
82
83/*
84 */

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94 ether_header_t *eh;
95 ip_t ipsv;
96 int err;
97
98 if (!ipbuf)
99 ipbuf = (char *)malloc(65536);
100 eh = (ether_header_t *)ipbuf;
101
80 last_gw.s_addr = gwip.s_addr;
81 err = sendip(nfd, s, sizeof(*eh) + len);
82 return err;
83}
84
85
86/*
87 */

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97 ether_header_t *eh;
98 ip_t ipsv;
99 int err;
100
101 if (!ipbuf)
102 ipbuf = (char *)malloc(65536);
103 eh = (ether_header_t *)ipbuf;
104
102 bzero((char *)&eh->ether_shost, sizeof(eh->ether_shost));
105 bzero((char *)A_A eh->ether_shost, sizeof(eh->ether_shost));
103 if (last_gw.s_addr && (gwip.s_addr == last_gw.s_addr))
106 if (last_gw.s_addr && (gwip.s_addr == last_gw.s_addr))
104 bcopy(last_arp, (char *)&eh->ether_dhost, 6);
105 else if (arp((char *)&gwip, (char *)&eh->ether_dhost) == -1)
107 bcopy(last_arp, (char *)A_A eh->ether_dhost, 6);
108 else if (arp((char *)&gwip, (char *)A_A eh->ether_dhost) == -1)
106 {
107 perror("arp");
108 return -2;
109 }
109 {
110 perror("arp");
111 return -2;
112 }
110 bcopy((char *)&eh->ether_dhost, last_arp, sizeof(last_arp));
111 eh->ether_type = ETHERTYPE_IP;
113 bcopy((char *)A_A eh->ether_dhost, last_arp, sizeof(last_arp));
114 eh->ether_type = htons(ETHERTYPE_IP);
112
113 bcopy((char *)ip, (char *)&ipsv, sizeof(*ip));
114 last_gw.s_addr = gwip.s_addr;
115 ip->ip_len = htons(ip->ip_len);
116 ip->ip_off = htons(ip->ip_off);
115
116 bcopy((char *)ip, (char *)&ipsv, sizeof(*ip));
117 last_gw.s_addr = gwip.s_addr;
118 ip->ip_len = htons(ip->ip_len);
119 ip->ip_off = htons(ip->ip_off);
117 if (!ip->ip_v)
118 ip->ip_v = IPVERSION;
119 if (!ip->ip_id)
120 ip->ip_id = htons(id++);
121 if (!ip->ip_ttl)
122 ip->ip_ttl = 60;
120 if (!(frag & 2)) {
121 if (!ip->ip_v)
122 ip->ip_v = IPVERSION;
123 if (!ip->ip_id)
124 ip->ip_id = htons(id++);
125 if (!ip->ip_ttl)
126 ip->ip_ttl = 60;
127 }
123
124 if (!frag || (sizeof(*eh) + ntohs(ip->ip_len) < mtu))
125 {
126 ip->ip_sum = 0;
127 ip->ip_sum = chksum((u_short *)ip, ip->ip_hl << 2);
128
129 bcopy((char *)ip, ipbuf + sizeof(*eh), ntohs(ip->ip_len));
130 err = sendip(nfd, ipbuf, sizeof(*eh) + ntohs(ip->ip_len));

--- 211 unchanged lines hidden --- 		128
129 if (!frag || (sizeof(*eh) + ntohs(ip->ip_len) < mtu))
130 {
131 ip->ip_sum = 0;
132 ip->ip_sum = chksum((u_short *)ip, ip->ip_hl << 2);
133
134 bcopy((char *)ip, ipbuf + sizeof(*eh), ntohs(ip->ip_len));
135 err = sendip(nfd, ipbuf, sizeof(*eh) + ntohs(ip->ip_len));

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