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CNetworkInfo::getNetworkInterface() OpenBSD/NetBSD support

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added IPv4 default routing information request code for OpenBSD/NetBSD.
This commit is contained in:
SASANO Takayoshi 2020-10-06 06:17:55 +09:00
parent 5dc3308ef4
commit 879b426308
1 changed files with 61 additions and 8 deletions
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69
NetworkInfo.cpp
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@ -26,13 +26,18 @@
#include <clocale>
#include <sys/types.h>
#if !defined(_WIN32) && !defined(_WIN64)
#if defined(__linux__) || defined(__OpenBSD__) || defined(__NetBSD__)
#include <ifaddrs.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#else
#if defined(__OpenBSD__) || defined(__NetBSD__)
#include <sys/sysctl.h>
#include <net/if.h>
#include <net/route.h>
#endif
#elif defined(_WIN32) || defined(_WIN64)
#include <ws2tcpip.h>
#include <iphlpapi.h>
#pragma comment(lib, "iphlpapi.lib")
@ -61,17 +66,16 @@ void CNetworkInfo::getNetworkInterface(unsigned char* info)
::strcpy((char*)info, "(address unknown)");
#if !defined(_WIN32) && !defined(_WIN64)
const unsigned int IFLISTSIZ = 25U;
#if defined(__linux__) || defined(__NetBSD__) || defined(__OpenBSD__)
char* dflt = NULL;
FILE* fp = ::fopen("/proc/net/route" , "r");
#if defined(__linux__)
FILE* fp = ::fopen("/proc/net/route" , "r"); // IPv4 routing
if (fp == NULL) {
LogError("Unabled to open /proc/route");
return;
}
char* dflt = NULL;
char line[100U];
while (::fgets(line, 100U, fp)) {
char* p1 = strtok(line , " \t");
@ -87,11 +91,60 @@ void CNetworkInfo::getNetworkInterface(unsigned char* info)
::fclose(fp);
#elif defined(__OpenBSD__) || defined(__NetBSD__)
const int mib[] = {
CTL_NET,
PF_ROUTE,
0, // protocol
AF_INET, // IPv4 routing
NET_RT_DUMP,
0, // show all routes
#if defined(__OpenBSD__)
0, // table id
#endif
};
const int cnt = sizeof(mib) / sizeof(int);
size_t size;
char ifname[IF_NAMESIZE] = {};
if (::sysctl(mib, cnt, NULL, &size, NULL, 0) == -1 || size <= 0) {
LogError("Unable to estimate routing table size");
return;
}
char *buf = new char[size];
if (::sysctl(mib, cnt, buf, &size, NULL, 0) == -1) {
LogError("Unable to get routing table");
delete[] buf;
return;
}
struct rt_msghdr *rtm;
for (char *p = buf; p < buf + size; p += rtm->rtm_msglen) {
rtm = (struct rt_msghdr *)p;
if (rtm->rtm_version != RTM_VERSION)
continue;
#if defined(__OpenBSD__)
struct sockaddr_in *sa = (struct sockaddr_in *)(p + rtm->rtm_hdrlen);
#elif defined(__NetBSD__)
struct sockaddr_in *sa = (struct sockaddr_in *)(rtm + 1);
#endif
if (sa->sin_addr.s_addr == INADDR_ANY) {
::if_indextoname(rtm->rtm_index, ifname);
break;
}
}
delete[] buf;
if (::strlen(ifname))
dflt = ifname;
#endif
if (dflt == NULL) {
LogError("Unable to find the default route");
return;
}
const unsigned int IFLISTSIZ = 25U;
char interfacelist[IFLISTSIZ][50+INET6_ADDRSTRLEN];
for (unsigned int n = 0U; n < IFLISTSIZ; n++)
interfacelist[n][0] = 0;
@ -144,7 +197,7 @@ void CNetworkInfo::getNetworkInterface(unsigned char* info)
}
LogInfo(" IP to show: %s", info);
#else
#elif defined(_WIN32) || defined(_WIN64)
PMIB_IPFORWARDTABLE pIpForwardTable = (MIB_IPFORWARDTABLE *)::malloc(sizeof(MIB_IPFORWARDTABLE));
if (pIpForwardTable == NULL) {
LogError("Error allocating memory");