diff options
Diffstat (limited to 'fmtutils.c')
| -rw-r--r-- | fmtutils.c | 56 |
1 files changed, 56 insertions, 0 deletions
@@ -129,3 +129,59 @@ 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 a string for a Win32-specific error (i.e. an error generated when + * calling a Win32 API). + * For errors occurred during standard C calls, we still use pcap_strerror(). + */ +void +pcap_win32_err_to_str(DWORD error, char *errbuf) +{ + DWORD retval; + size_t errlen; + char *p; + + /* + * 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, error, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), + errbuf, PCAP_ERRBUF_SIZE, NULL); + if (retval == 0) { + /* + * Failed. + */ + pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE, + "Couldn't get error message for error (%lu)", error); + return; + } + + /* + * "FormatMessage()" "helpfully" sticks CR/LF at the end of the + * message. Get rid of it. + * + * XXX - still true with FORMAT_MESSAGE_MAX_WIDTH_MASK? + */ + errlen = strlen(errbuf); + if (errlen >= 2 && + errbuf[errlen - 2] == '\r' && errbuf[errlen - 1] == '\n') { + errbuf[errlen - 2] = '\0'; + errbuf[errlen - 1] = '\0'; + } + p = strchr(errbuf, '\0'); + pcap_snprintf(p, PCAP_ERRBUF_SIZE+1-(p-errbuf), " (%lu)", error); +} +#endif |