pktdump.c 4.95 KB
Newer Older
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
/* pktdump.c */

/* $Id$ */

#include "fidodefs.h"
#include "sbbsdefs.h"	/* faddr_t */

FILE* nulfp;
FILE* bodyfp;

/****************************************************************************/
/* Returns an ASCII string for FidoNet address 'addr'                       */
/****************************************************************************/
char *faddrtoa(faddr_t* addr, char* outstr)
{
	static char str[64];
    char point[25];

	if(addr==NULL)
		return("0:0/0");
	sprintf(str,"%hu:%hu/%hu",addr->zone,addr->net,addr->node);
	if(addr->point) {
		sprintf(point,".%hu",addr->point);
		strcat(str,point); }
	if(outstr==NULL)
		return(str);
	strcpy(outstr,str);
	return(outstr);
}

char* freadstr(FILE* fp, char* str, size_t maxlen)
{
	int		ch;
	size_t	len=0;

	while((ch=fgetc(fp))!=EOF && len<maxlen) {
		str[len++]=ch;
		if(ch==0)
			break;
	}

	str[maxlen-1]=0;

	return(str);
}
	

int pktdump(FILE* fp, const char* fname)
{
	int			ch,lastch;
	char		buf[128];
	char		origdomn[16]="";
	char		destdomn[16]="";
	char		to[FIDO_NAME_LEN];
	char		from[FIDO_NAME_LEN];
	char		subj[FIDO_SUBJ_LEN];
	long		offset;
	faddr_t		orig;
	faddr_t		dest;
	fpkthdr_t	pkthdr;
	fpkdmsg_t	pkdmsg;

	if(fread(&pkthdr,sizeof(BYTE),sizeof(pkthdr),fp)!=sizeof(pkthdr)) {
		fprintf(stderr,"%s !Error reading pkthdr (%u bytes)\n"
			,fname,sizeof(pkthdr));
		return(-1);
	}

	fseek(fp,-2L,SEEK_END);
	fread(buf,sizeof(BYTE),sizeof(buf),fp);
	if(memcmp(buf,"\x00\x00",2)) {
		fprintf(stderr,"%s !Packet missing terminating nulls: %02X %02X\n"
			,fname,buf[0],buf[1]);
//		return(-2);
	}

	orig.zone=pkthdr.origzone;
	orig.net=pkthdr.orignet;
	orig.node=pkthdr.orignode;
	orig.point=0;

	dest.zone=pkthdr.destzone;
	dest.net=pkthdr.destnet;
	dest.node=pkthdr.destnode;
	dest.point=0;				/* No point info in the 2.0 hdr! */

	printf("%s Packet Type ", fname);

	if(pkthdr.fill.two_plus.cword==_rotr(pkthdr.fill.two_plus.cwcopy,8)  /* 2+ Packet Header */
		&& pkthdr.fill.two_plus.cword&1) {
		fprintf(stdout,"2+");
		dest.point=pkthdr.fill.two_plus.destpoint;
93
		if(pkthdr.fill.two_plus.origpoint!=0 && orig.net==0xffff) {	/* see FSC-0048 for details */
94
			orig.net=pkthdr.fill.two_plus.auxnet;
95
96
			orig.point=pkthdr.fill.two_plus.origpoint;
		}
97
98
99
100
101
102
103
104
105
106
107
	} else if(pkthdr.baud==2) {					/* Type 2.2 Packet Header */
		fprintf(stdout,"2.2");
		dest.point=pkthdr.month; 
		sprintf(origdomn,"@%s",pkthdr.fill.two_two.origdomn);
		sprintf(destdomn,"@%s",pkthdr.fill.two_two.destdomn);
	} else
		fprintf(stdout,"2.0");

	printf(" from %s%s",faddrtoa(&orig,NULL),origdomn);
	printf(" to %s%s\n"	,faddrtoa(&dest,NULL),destdomn);

108
109
110
	if(pkthdr.password[0])
		fprintf(stdout,"Password: '%.*s'\n",sizeof(pkthdr.password),pkthdr.password);

111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
	fseek(fp,sizeof(pkthdr),SEEK_SET);

	/* Read/Display packed messages */
	while(!feof(fp)) {

		printf("%08lX\n",offset=ftell(fp));

		/* Read fixed-length header fields */
		if(fread(&pkdmsg,sizeof(BYTE),sizeof(pkdmsg),fp)!=sizeof(pkdmsg))
			break;
		/* Display fixed-length fields */
		printf("%s %06lX Packed Message Type: %d from %u/%u to %u/%u\n"
			,fname
			,offset
			,pkdmsg.type
			,pkdmsg.orignet, pkdmsg.orignode
			,pkdmsg.destnet, pkdmsg.destnode);
		printf("Attribute: %04X\n",pkdmsg.attr);
		printf("Date/Time: %s\n",pkdmsg.time);

		/* Read variable-length header fields */
		freadstr(fp,to,sizeof(to));
		freadstr(fp,from,sizeof(from));
		freadstr(fp,subj,sizeof(subj));
	
		/* Display variable-length fields */
		printf("%-4s : %s\n","To",to);
		printf("%-4s : %s\n","From",from);
		printf("%-4s : %s\n","Subj",subj);

		fprintf(bodyfp,"\n-start of message text-\n");

		while((ch=fgetc(fp))!=EOF && ch!=0) {
			if(lastch=='\r' && ch!='\n')
				fputc('\n',bodyfp);
			fputc(lastch=ch,bodyfp);
		}

		fprintf(bodyfp,"\n-end of message text-\n");
	}

	return(0);
}

155
156
char* usage = "usage: pktdump [-body] <file1.pkt> [file2.pkt] [...]\n";

157
158
159
160
int main(int argc, char** argv)
{
	FILE*	fp;
	int		i;
161
162
163
164
165
166
167
168
169
170
171
172
	char	revision[16];

	sscanf("$Revision$", "%*s %s", revision);

	fprintf(stderr,"pktdump rev %s - Dump FidoNet Packets\n\n"
		,revision
		);

	if(argc<2) {
		fprintf(stderr,"%s",usage);
		return -1;
	}
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199

	if((nulfp=fopen(_PATH_DEVNULL,"w+"))==NULL) {
		perror(_PATH_DEVNULL);
		return -1;
	}
	bodyfp=nulfp;

	if(sizeof(fpkthdr_t)!=FIDO_PACKET_HDR_LEN) {
		printf("sizeof(fpkthdr_t)=%d, expected: %d\n",sizeof(fpkthdr_t),FIDO_PACKET_HDR_LEN);
		return(-1);
	}
	if(sizeof(fpkdmsg_t)!=FIDO_PACKED_MSG_HDR_LEN) {
		printf("sizeof(fpkdmsg_t)=%d, expected: %d\n",sizeof(fpkdmsg_t),FIDO_PACKED_MSG_HDR_LEN);
		return(-1);
	}
	if(sizeof(fmsghdr_t)!=FIDO_STORED_MSG_HDR_LEN) {
		printf("sizeof(fmsghdr_t)=%d, expected: %d\n",sizeof(fmsghdr_t),FIDO_STORED_MSG_HDR_LEN);
		return(-1);
	}

	for(i=1;i<argc;i++) {
		if(argv[i][0]=='-') {
			switch(tolower(argv[i][1])) {
				case 'b':
					bodyfp=stdout;;
					break;
				default:
200
					printf("%s",usage);
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
					return(0);
			}
			continue;
		}
		fprintf(stdout,"Opening %s\n",argv[i]);
		if((fp=fopen(argv[i],"rb"))==NULL) {
			perror(argv[i]);
			continue;
		}
		pktdump(fp, argv[i]);
		fclose(fp);
	}

	return(0);
}