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monitor: Print data packet for unknown attributes

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This commit is contained in:
Marcel Holtmann 2014-08-03 08:38:55 +02:00
parent 34d8b0d308
commit dfcb1ddbc1
1 changed files with 49 additions and 0 deletions
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49
monitor/nlmon.c
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@ -26,6 +26,7 @@
#include <stdio.h>
#include <errno.h>
#include <ctype.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
@ -59,6 +60,51 @@ static void nlmon_req_free(void *data)
l_free(req);
}
#define print_indent(indent, fmt, args...) \
printf("%*c" fmt "\n", (indent), ' ', ## args)
#define print_text(fmt, args...) \
print_indent(8, fmt, ## args)
static void print_hexdump(const unsigned char *buf, uint16_t len)
{
static const char hexdigits[] = "0123456789abcdef";
char str[68];
uint16_t i;
if (!len)
return;
for (i = 0; i < len; i++) {
str[((i % 16) * 3) + 0] = hexdigits[buf[i] >> 4];
str[((i % 16) * 3) + 1] = hexdigits[buf[i] & 0xf];
str[((i % 16) * 3) + 2] = ' ';
str[(i % 16) + 49] = isprint(buf[i]) ? buf[i] : '.';
if ((i + 1) % 16 == 0) {
str[47] = ' ';
str[48] = ' ';
str[65] = '\0';
print_text("%s", str);
str[0] = ' ';
}
}
if (i % 16 > 0) {
uint16_t j;
for (j = (i % 16); j < 16; j++) {
str[(j * 3) + 0] = ' ';
str[(j * 3) + 1] = ' ';
str[(j * 3) + 2] = ' ';
str[j + 49] = ' ';
}
str[47] = ' ';
str[48] = ' ';
str[65] = '\0';
print_text("%s", str);
}
}
enum attr_type {
ATTR_UNSPEC,
ATTR_FLAG,
@ -533,6 +579,7 @@ static void print_attributes(int indent, const void *buf, uint32_t len)
case ATTR_UNSPEC:
printf("%*c%s: len %u\n", indent, ' ', str,
NLA_PAYLOAD(nla));
print_hexdump(NLA_DATA(nla), NLA_PAYLOAD(nla));
break;
case ATTR_FLAG:
printf("%*c%s: true\n", indent, ' ', str);
@ -574,12 +621,14 @@ static void print_attributes(int indent, const void *buf, uint32_t len)
case ATTR_ADDRESS:
printf("%*c%s: len %u\n", indent, ' ', str,
NLA_PAYLOAD(nla));
print_hexdump(NLA_DATA(nla), NLA_PAYLOAD(nla));
if (NLA_PAYLOAD(nla) != 6)
printf("malformed packet\n");
break;
case ATTR_BINARY:
printf("%*c%s: len %u\n", indent, ' ', str,
NLA_PAYLOAD(nla));
print_hexdump(NLA_DATA(nla), NLA_PAYLOAD(nla));
break;
}