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Update to libpcap 1.9.1 (initial commit, no Nmap-specific patches)

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This commit is contained in:
dmiller
2019-11-19 17:53:36 +00:00
parent 42bb2feed8
commit f1107301e8
125 changed files with 7238 additions and 13624 deletions
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99
libpcap/fmtutils.c
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@@ -65,11 +65,6 @@ pcap_fmt_errmsg_for_errno(char *errbuf, size_t errbuflen, int errnum,
size_t msglen;
char *p;
size_t errbuflen_remaining;
#if defined(HAVE_STRERROR_S)
errno_t err;
#elif defined(HAVE_STRERROR_R)
int err;
#endif
va_start(ap, fmt);
pcap_vsnprintf(errbuf, errbuflen, fmt, ap);
@@ -96,7 +91,10 @@ pcap_fmt_errmsg_for_errno(char *errbuf, size_t errbuflen, int errnum,
* Now append the string for the error code.
*/
#if defined(HAVE_STRERROR_S)
err = strerror_s(p, errbuflen_remaining, errnum);
/*
* We have a Windows-style strerror_s().
*/
errno_t err = strerror_s(p, errbuflen_remaining, errnum);
if (err != 0) {
/*
* It doesn't appear to be documented anywhere obvious
@@ -104,8 +102,24 @@ pcap_fmt_errmsg_for_errno(char *errbuf, size_t errbuflen, int errnum,
*/
pcap_snprintf(p, errbuflen_remaining, "Error %d", errnum);
}
#elif defined(HAVE_STRERROR_R)
err = strerror_r(errnum, p, errbuflen_remaining);
#elif defined(HAVE_GNU_STRERROR_R)
/*
* We have a GNU-style strerror_r(), which is *not* guaranteed to
* do anything to the buffer handed to it, and which returns a
* pointer to the error string, which may or may not be in
* the buffer.
*
* It is, however, guaranteed to succeed.
*/
char strerror_buf[PCAP_ERRBUF_SIZE];
char *errstring = strerror_r(errnum, strerror_buf, PCAP_ERRBUF_SIZE);
pcap_snprintf(p, errbuflen_remaining, "%s", errstring);
#elif defined(HAVE_POSIX_STRERROR_R)
/*
* We have a POSIX-style strerror_r(), which is guaranteed to fill
* in the buffer, but is not guaranteed to succeed.
*/
int err = strerror_r(errnum, p, errbuflen_remaining);
if (err == EINVAL) {
/*
* UNIX 03 says this isn't guaranteed to produce a
@@ -129,3 +143,72 @@ pcap_fmt_errmsg_for_errno(char *errbuf, size_t errbuflen, int errnum,
pcap_snprintf(p, errbuflen_remaining, "%s", pcap_strerror(errnum));
#endif
}
#ifdef _WIN32
/*
* Generate an error message based on a format, arguments, and a
* Win32 error, with a message for the Win32 error after the formatted output.
*/
void
pcap_fmt_errmsg_for_win32_err(char *errbuf, size_t errbuflen, DWORD errnum,
const char *fmt, ...)
{
va_list ap;
size_t msglen;
char *p;
size_t errbuflen_remaining;
DWORD retval;
char win32_errbuf[PCAP_ERRBUF_SIZE+1];
va_start(ap, fmt);
pcap_vsnprintf(errbuf, errbuflen, fmt, ap);
va_end(ap);
msglen = strlen(errbuf);
/*
* Do we have enough space to append ": "?
* Including the terminating '\0', that's 3 bytes.
*/
if (msglen + 3 > errbuflen) {
/* No - just give them what we've produced. */
return;
}
p = errbuf + msglen;
errbuflen_remaining = errbuflen - msglen;
*p++ = ':';
*p++ = ' ';
*p = '\0';
msglen += 2;
errbuflen_remaining -= 2;
/*
* Now append the string for the error code.
*
* XXX - what language ID to use?
*
* For UN*Xes, pcap_strerror() may or may not return localized
* strings.
*
* We currently don't have localized messages for libpcap, but
* we might want to do so. On the other hand, if most of these
* messages are going to be read by libpcap developers and
* perhaps by developers of libpcap-based applications, English
* might be a better choice, so the developer doesn't have to
* get the message translated if it's in a language they don't
* happen to understand.
*/
retval = FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_IGNORE_INSERTS|FORMAT_MESSAGE_MAX_WIDTH_MASK,
NULL, errnum, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
win32_errbuf, PCAP_ERRBUF_SIZE, NULL);
if (retval == 0) {
/*
* Failed.
*/
pcap_snprintf(p, errbuflen_remaining,
"Couldn't get error message for error (%lu)", errnum);
return;
}
pcap_snprintf(p, errbuflen_remaining, "%s (%lu)", win32_errbuf, errnum);
}
#endif