void dump_muss_payload(char *buf, size_t buflen, const u8 *src, size_t srclen)
{
assert(srclen >= 8);
snprintf(buf, buflen, "........");
if (buflen > 9)
dump_chars_buf(buf+8, buflen-8, (char *)(src+8), srclen-8);
}
static void fprint2str(char *buf, size_t len, const echo_fingerprint *f)
{
int used = snprintf(buf, len, "%s,ttl=%u,idz=%u,df=%u,bytes=%u,payload=",
PerMsg[f->type].shortname, f->ttl, f->idz, f->df, f->len);
if (used > 0) {
if (is_muuss_payload(f->payload, f->len))
dump_muss_payload(buf+used, len-used, f->payload, f->len);
else
dump_chars_buf(buf+used, len-used, (char *)f->payload, f->len);
}
}
size_t http_dump_headers(const http_headers *h, int opt, FILE *out)
{
static char buf[4096];
# define DUMP_KEY_ALIGN 24
static const char Dots[DUMP_KEY_ALIGN] = "........................";
int bytes = 0;
unsigned i, j;
for (i = 0; i < h->cnt; i++) {
const char *ks = h->h[i].key.start;
const size_t kl = h->h[i].key.len,
kdlen = dump_chars_buf(buf, sizeof buf, ks, kl);
bytes += fprintf(out, " %.*s%.*s", (int)kdlen, buf,
(int)(kdlen > DUMP_KEY_ALIGN ? 0 : DUMP_KEY_ALIGN - kdlen), Dots);
for (j = 0; j < h->h[i].val.cnt; j++) {
const char *vs = h->h[i].val.p[j].start;
const size_t vl = h->h[i].val.p[j].len,
vdlen = dump_chars_buf(buf, sizeof buf, vs, vl);
bytes += fprintf(out, "%.*s", (int)vdlen, buf);
}
fputc('\n', out), bytes++;
}
return (size_t)bytes;
}
static size_t dump_qd(const char *buf, size_t len, FILE *out)
{
char namebuf[1024];
const char *name = (const char *)buf;
size_t namel = memcspn(name, len, "\x00", 1);
int bytes = 0;
const dns_query *q = (dns_query *)(buf + namel + 1);
(void)dump_chars_buf(namebuf, sizeof namebuf, buf, namel);
#if 0
printf("len=%u name[namel=%u]=%s name[10]=", (unsigned)len, (unsigned)namel, namebuf);
dump_chars(name, 10, stdout);
fputc('\n', stdout);
#endif
bytes = fprintf(out, " qd name=%s type=%hu(%s) class=%hu(%s)\n",
namebuf,
ntohs(q->type), type2str(ntohs(q->type)),
ntohs(q->class_), class2str(ntohs(q->class_)));
return bytes;
}
static size_t dump_rr(enum DNS_RR rr, const parse_frame *f, const char *buf, size_t len, FILE *out)
{
char namebuf[256],
targetbuf[256];
const char *name = buf;
size_t namelen = dns_calc_len_name(name, len);
const dns_answer *a = (dns_answer *)(buf + namelen);
int bytes;
(void)dump_chars_buf(namebuf, sizeof namebuf, name, namelen-1);
bytes = fprintf(out,
" %s name=%s type=%hu(%s) class=%hu(%s) ttl=%ld target=%s\n",
RR[rr].name, namebuf,
ntohs(a->type), type2str(ntohs(a->type)),
a->class_, class2str(a->class_),
(long)ntohl(a->ttl),
addrformat(ntohs(a->type), targetbuf, sizeof targetbuf,
(char *)a + sizeof *a, ntohs(a->rrlen)));
#ifndef TEST
/* TODO: split this block off to another function */
if (DNS_RR_AN == rr && DNS_Type_TXT == ntohs(a->type)) {
/* is a TXT record answer; usually supplemental information that can
* contain some interesting stuff */
const char *addrtype = NULL;
char ipbuf[64];
const parse_frame *fi = f-2;
if (PROT_IPv4 == fi->id) {
const ipv4 *i = fi->off;
addrtype = "4";
ipv4_addr_format(ipbuf, sizeof ipbuf, i->src);
} else if (PROT_IPv6 == fi->id) {
const ipv6 *i = fi->off;
addrtype = "6";
ipv6_addr_format(ipbuf, sizeof ipbuf, i->src);
}
if (addrtype) {
(void)dump_chars_buf(namebuf, sizeof namebuf, name,
strip_c0(namebuf, namelen));
(void)dump_chars_buf(targetbuf, sizeof targetbuf, (char *)a + sizeof *a,
strip_c0((char *)a + sizeof *a, ntohs(a->rrlen)));
if ('\0' != namebuf[0])
rep_hint(addrtype, ipbuf, "DNS.TXT", namebuf, -1);
if ('\0' != targetbuf[0])
rep_hint(addrtype, ipbuf, "DNS.TXT", targetbuf, -1);
}
} else if (DNS_RR_AN == rr
&& (DNS_Type_A == ntohs(a->type) || DNS_Type_AAAA == ntohs(a->type))
&& str_endswith(namebuf, "\\x05local")) {
/* we're looking for ".local" addresses; which may identify the machine */
char ipbuf[64];
const parse_frame *fi = f-2;
const char *addrtype = NULL;
if (PROT_IPv4 == fi->id) {
const ipv4 *i = fi->off;
addrtype = "4";
ipv4_addr_format(ipbuf, sizeof ipbuf, i->src);
} else if (PROT_IPv6 == fi->id) {
const ipv6 *i = fi->off;
addrtype = "6";
ipv6_addr_format(ipbuf, sizeof ipbuf, i->src);
}
(void)dump_chars_buf(namebuf, sizeof namebuf, name, namelen-1);
if ('\0' != namebuf[0]) {
rep_hint(addrtype, ipbuf, "DNS.LOCAL", namebuf, -1);
}
{
char localname[64];
/* first char is length of actual name */
if (name[0] > 0 && (unsigned)name[0] < sizeof localname) {
strlcpy(localname, name+1, (size_t)name[0]+1);
localname[(unsigned)name[0]] = '\0';
} else {
strlcpy(localname, name+1, sizeof localname);
}
rep_addr(addrtype, ipbuf, "D", localname, "DNS.LOCAL", 1);
}
}
#endif
return (size_t)bytes;
}
