#include <sys/types.h>
#include <sys/param.h>
#if (defined(linux) && !defined(INET6)) || defined(__FreeBSD__)
#include "config.h"
#include <stdio.h>
#include <string.h>
#if defined(STDC_HEADERS)
#include <stdlib.h>
#endif
#if defined(HAVE_UNISTD_H)
#include <unistd.h>
#endif
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <net/if.h>
#if defined(__FreeBSD__)
#if __FreeBSD_version >= 300001
#include <net/if_var.h>
#endif
#include <kvm.h>
#include <nlist.h>
#include <sys/fcntl.h>
#endif
#include "config.h"
#include "fetchmail.h"
#include "i18n.h"
#include "tunable.h"
typedef struct {
struct in_addr addr, dstaddr, netmask;
int rx_packets, tx_packets;
} ifinfo_t;
struct interface_pair_s {
struct in_addr interface_address;
struct in_addr interface_mask;
} *interface_pair;
static char *netdevfmt;
#define MONITOR_SLOP 5
#if defined(linux)
void interface_init(void)
{
FILE *fp = popen("uname -r", "r");
netdevfmt = "%d %d %*d %*d %*d %d %*d %d %*d %*d %*d %*d %d";
if (!fp)
return;
else
{
int major, minor;
if (fscanf(fp, "%d.%d.%*d", &major, &minor) != 2)
return;
if (major >= 2 && minor >= 2)
netdevfmt = "%d %d %*d %*d %*d %d %*d %*d %*d %d %*d %*d %d";
}
}
static int _get_ifinfo_(int socket_fd, FILE *stats_file, const char *ifname,
ifinfo_t *ifinfo)
{
int namelen = strlen(ifname);
struct ifreq request;
char *cp, buffer[256];
int found = 0;
int counts[4];
memset((char *) ifinfo, 0, sizeof(ifinfo_t));
while (fgets(buffer, sizeof(buffer) - 1, stats_file)) {
for (cp = buffer; *cp && *cp == ' '; ++cp);
if (!strncmp(cp, ifname, namelen) &&
cp[namelen] == ':') {
cp += namelen + 1;
if (sscanf(cp, netdevfmt,
counts, counts+1, counts+2,
counts+3,&found)>4) {
ifinfo->rx_packets=counts[1];
ifinfo->tx_packets=counts[3];
} else {
ifinfo->rx_packets=counts[0];
ifinfo->tx_packets=counts[2];
}
found = 1;
}
}
if (!found) return (FALSE);
strcpy(request.ifr_name, ifname);
if (ioctl(socket_fd, SIOCGIFFLAGS, &request) < 0)
return(FALSE);
if (!(request.ifr_flags & IFF_RUNNING))
return(FALSE);
strcpy(request.ifr_name, ifname);
if (ioctl(socket_fd, SIOCGIFADDR, &request) < 0)
return(FALSE);
ifinfo->addr = ((struct sockaddr_in *) (&request.ifr_addr))->sin_addr;
strcpy(request.ifr_name, ifname);
if (ioctl(socket_fd, SIOCGIFDSTADDR, &request) >= 0)
ifinfo->dstaddr = ((struct sockaddr_in *)
(&request.ifr_dstaddr))->sin_addr;
strcpy(request.ifr_name, ifname);
if (ioctl(socket_fd, SIOCGIFNETMASK, &request) >= 0) {
ifinfo->netmask = ((struct sockaddr_in *)
(&request.ifr_netmask))->sin_addr;
return (TRUE);
}
return(FALSE);
}
static int get_ifinfo(const char *ifname, ifinfo_t *ifinfo)
{
int socket_fd = socket(AF_INET, SOCK_DGRAM, 0);
FILE *stats_file = fopen("/proc/net/dev", "r");
int result;
if (socket_fd < 0 || !stats_file)
result = FALSE;
else
{
char *sp = strchr(ifname, '/');
if (sp)
*sp = '\0';
result = _get_ifinfo_(socket_fd, stats_file, ifname, ifinfo);
if (sp)
*sp = '/';
}
if (socket_fd >= 0)
close(socket_fd);
if (stats_file)
fclose(stats_file);
return(result);
}
#elif defined __FreeBSD__
static kvm_t *kvmfd;
static struct nlist symbols[] =
{
{"_ifnet"},
{NULL}
};
static u_long ifnet_savedaddr;
static gid_t if_rgid;
static gid_t if_egid;
void
interface_set_gids(gid_t egid, gid_t rgid)
{
if_rgid = rgid;
if_egid = egid;
}
static int
openkvm(void)
{
if ((kvmfd = kvm_open(NULL, NULL, NULL, O_RDONLY, NULL)) == NULL)
return FALSE;
if (kvm_nlist(kvmfd, symbols) < 0)
return FALSE;
if (kvm_read(kvmfd, (unsigned long) symbols[0].n_value, &ifnet_savedaddr, sizeof(unsigned long)) == -1)
return FALSE;
return TRUE;
}
static int
get_ifinfo(const char *ifname, ifinfo_t *ifinfo)
{
char tname[16];
char iname[16];
struct ifnet ifnet;
unsigned long ifnet_addr = ifnet_savedaddr;
#if __FreeBSD_version >= 300001
struct ifnethead ifnethead;
struct ifaddrhead ifaddrhead;
#endif
struct ifaddr ifaddr;
unsigned long ifaddr_addr;
struct sockaddr sa;
unsigned long sa_addr;
uint i;
if (if_egid)
setegid(if_egid);
for (i = 0; ifname[i] && ifname[i] != '/'; i++)
iname[i] = ifname[i];
iname[i] = '\0';
if (!kvmfd)
{
if (!openkvm())
{
report(stderr, 0, _("Unable to open kvm interface. Make sure fetchmail is SGID kmem."));
if (if_egid)
setegid(if_rgid);
exit(1);
}
}
#if __FreeBSD_version >= 300001
kvm_read(kvmfd, ifnet_savedaddr, (char *) &ifnethead, sizeof ifnethead);
ifnet_addr = (u_long) ifnethead.tqh_first;
#else
ifnet_addr = ifnet_savedaddr;
#endif
while (ifnet_addr)
{
kvm_read(kvmfd, ifnet_addr, &ifnet, sizeof(ifnet));
kvm_read(kvmfd, (unsigned long) ifnet.if_name, tname, sizeof tname);
snprintf(tname, sizeof tname - 1, "%s%d", tname, ifnet.if_unit);
if (!strcmp(tname, iname))
{
if (!(ifnet.if_flags & IFF_UP))
{
if (if_egid)
setegid(if_rgid);
return 0;
}
ifinfo->rx_packets = ifnet.if_ipackets;
ifinfo->tx_packets = ifnet.if_opackets;
#if __FreeBSD_version >= 300001
ifaddr_addr = (u_long) ifnet.if_addrhead.tqh_first;
#else
ifaddr_addr = (u_long) ifnet.if_addrlist;
#endif
while(ifaddr_addr)
{
kvm_read(kvmfd, ifaddr_addr, &ifaddr, sizeof(ifaddr));
kvm_read(kvmfd, (u_long)ifaddr.ifa_addr, &sa, sizeof(sa));
if (sa.sa_family != AF_INET)
{
#if __FreeBSD_version >= 300001
ifaddr_addr = (u_long) ifaddr.ifa_link.tqe_next;
#else
ifaddr_addr = (u_long) ifaddr.ifa_next;
#endif
continue;
}
ifinfo->addr.s_addr = *(u_long *)(sa.sa_data + 2);
kvm_read(kvmfd, (u_long)ifaddr.ifa_dstaddr, &sa, sizeof(sa));
ifinfo->dstaddr.s_addr = *(u_long *)(sa.sa_data + 2);
kvm_read(kvmfd, (u_long)ifaddr.ifa_netmask, &sa, sizeof(sa));
ifinfo->netmask.s_addr = *(u_long *)(sa.sa_data + 2);
if (if_egid)
setegid(if_rgid);
return 1;
}
if (if_egid)
setegid(if_rgid);
return 0;
}
#if __FreeBSD_version >= 300001
ifnet_addr = (u_long) ifnet.if_link.tqe_next;
#else
ifnet_addr = (unsigned long) ifnet.if_next;
#endif
}
if (if_egid)
setegid(if_rgid);
return 0;
}
#endif
#ifndef HAVE_INET_ATON
#ifdef HAVE_NETINET_IN_SYSTM_H
# include <sys/types.h>
# include <netinet/in_systm.h>
#endif
#include <netinet/in.h>
#include <netinet/ip.h>
#include <arpa/inet.h>
#include <string.h>
static int inet_aton(const char *cp, struct in_addr *inp) {
long addr;
addr = inet_addr(cp);
if (addr == ((long) -1)) return 0;
memcpy(inp, &addr, sizeof(addr));
return 1;
}
#endif
void interface_parse(char *buf, struct hostdata *hp)
{
char *cp1, *cp2;
hp->interface = xstrdup(buf);
if (!(cp1 = strchr(buf, '/')))
{
(void) report(stderr,
_("missing IP interface address\n"));
exit(PS_SYNTAX);
}
*cp1++ = '\000';
if (!(cp2 = strchr(cp1, '/')))
cp2 = "255.255.255.255";
else
*cp2++ = '\000';
hp->interface_pair = (struct interface_pair_s *)xmalloc(sizeof(struct interface_pair_s));
if (!inet_aton(cp1, &hp->interface_pair->interface_address))
{
(void) report(stderr,
_("invalid IP interface address\n"));
exit(PS_SYNTAX);
}
if (!inet_aton(cp2, &hp->interface_pair->interface_mask))
{
(void) report(stderr,
_("invalid IP interface mask\n"));
exit(PS_SYNTAX);
}
hp->interface_pair->interface_address.s_addr &=
hp->interface_pair->interface_mask.s_addr;
*--cp1 = '/';
return;
}
void interface_note_activity(struct hostdata *hp)
{
ifinfo_t ifinfo;
struct query *ctl;
if (!hp->monitor)
return;
if (get_ifinfo(hp->monitor, &ifinfo))
for (ctl = querylist; ctl; ctl = ctl->next) {
if (ctl->server.monitor && !strcmp(hp->monitor, ctl->server.monitor))
ctl->server.monitor_io =
ifinfo.rx_packets + ifinfo.tx_packets;
if (&ctl->server == hp)
break;
}
#ifdef ACTIVITY_DEBUG
(void) report(stdout,
_("activity on %s -noted- as %d\n"),
hp->monitor, hp->monitor_io);
#endif
}
int interface_approve(struct hostdata *hp)
{
ifinfo_t ifinfo;
if (hp->interface) {
if (!get_ifinfo(hp->interface, &ifinfo)) {
(void) report(stdout,
_("skipping poll of %s, %s down\n"),
hp->pollname, hp->interface);
return(FALSE);
}
if ((ifinfo.addr.s_addr &
hp->interface_pair->interface_mask.s_addr) !=
hp->interface_pair->interface_address.s_addr) {
(void) report(stdout,
_("skipping poll of %s, %s IP address excluded\n"),
hp->pollname, hp->interface);
return(FALSE);
}
}
if (!hp->monitor)
return(TRUE);
#ifdef ACTIVITY_DEBUG
(void) report(stdout,
_("activity on %s checked as %d\n"),
hp->monitor, hp->monitor_io);
#endif
if (get_ifinfo(hp->monitor, &ifinfo))
{
int diff = (ifinfo.rx_packets + ifinfo.tx_packets)
- hp->monitor_io;
if (diff >= 0 && diff <= MONITOR_SLOP)
{
(void) report(stdout,
_("skipping poll of %s, %s inactive\n"),
hp->pollname, hp->monitor);
return(FALSE);
}
}
#ifdef ACTIVITY_DEBUG
report(stdout, _("activity on %s was %d, is %d\n"),
hp->monitor, hp->monitor_io,
ifinfo.rx_packets + ifinfo.tx_packets);
#endif
return(TRUE);
}
#endif