diff options
Diffstat (limited to 'interface.c')
| -rw-r--r-- | interface.c | 227 |
1 files changed, 222 insertions, 5 deletions
diff --git a/interface.c b/interface.c index eefcfd1d..bca8b0e8 100644 --- a/interface.c +++ b/interface.c @@ -33,12 +33,18 @@ #include <arpa/inet.h> #include <net/if.h> #if defined(__FreeBSD__) -#if __FreeBSD_version >= 300001 -#include <net/if_var.h> +#if defined __FreeBSD_USE_KVM + #if __FreeBSD_version >= 300001 + #include <net/if_var.h> + #endif + #include <kvm.h> + #include <nlist.h> + #include <sys/fcntl.h> +#else + #include <sys/sysctl.h> + #include <net/route.h> + #include <net/if_dl.h> #endif -#include <kvm.h> -#include <nlist.h> -#include <sys/fcntl.h> #endif #include "config.h" #include "fetchmail.h" @@ -182,6 +188,8 @@ static int get_ifinfo(const char *ifname, ifinfo_t *ifinfo) #elif defined __FreeBSD__ +#if defined __FreeBSD_USE_KVM + static kvm_t *kvmfd; static struct nlist symbols[] = { @@ -326,6 +334,215 @@ get_ifinfo(const char *ifname, ifinfo_t *ifinfo) return 0; } + +#else /* Do not use KVM on FreeBSD */ + +/* + * Expand the compacted form of addresses as returned via the + * configuration read via sysctl(). + */ + +static void +rt_xaddrs(caddr_t cp, caddr_t cplim, struct rt_addrinfo *rtinfo) +{ + struct sockaddr *sa; + int i; + +#define ROUNDUP(a) \ + ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) +#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) + + memset(rtinfo->rti_info, 0, sizeof(rtinfo->rti_info)); + for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { + if ((rtinfo->rti_addrs & (1 << i)) == 0) + continue; + rtinfo->rti_info[i] = sa = (struct sockaddr *)cp; + ADVANCE(cp, sa); + } + +#undef ROUNDUP +#undef ADVANCE +} + +static int +get_ifinfo(const char *ifname, ifinfo_t *ifinfo) +{ + uint i; + int rc = 0; + int ifindex = -1; + size_t needed; + char *buf = NULL; + char *lim = NULL; + char *next = NULL; + struct if_msghdr *ifm; + struct ifa_msghdr *ifam; + struct sockaddr_in *sin; + struct sockaddr_dl *sdl; + struct rt_addrinfo info; + char iname[16]; + int mib[6]; + + memset(ifinfo, 0, sizeof(ifinfo)); + + /* trim interface name */ + + for (i = 0; i < sizeof(iname) && ifname[i] && ifname[i] != '/'; i++) + iname[i] = ifname[i]; + + if (i == 0 || i == sizeof(iname)) + { + report(stderr, _("Unable to parse interface name from %s"), ifname); + return 0; + } + + iname[i] = 0; + + + /* get list of existing interfaces */ + + mib[0] = CTL_NET; + mib[1] = PF_ROUTE; + mib[2] = 0; + mib[3] = AF_INET; /* Only IP addresses please. */ + mib[4] = NET_RT_IFLIST; + mib[5] = 0; /* List all interfaces. */ + + + /* Get interface data. */ + + if (sysctl(mib, 6, NULL, &needed, NULL, 0) == -1) + { + report(stderr, + _("get_ifinfo: sysctl (iflist estimate) failed")); + exit(1); + } + if ((buf = malloc(needed)) == NULL) + { + report(stderr, + _("get_ifinfo: malloc failed")); + exit(1); + } + if (sysctl(mib, 6, buf, &needed, NULL, 0) == -1) + { + report(stderr, + _("get_ifinfo: sysctl (iflist) failed")); + exit(1); + } + + lim = buf+needed; + + + /* first look for the interface information */ + + next = buf; + while (next < lim) + { + ifm = (struct if_msghdr *)next; + next += ifm->ifm_msglen; + + if (ifm->ifm_version != RTM_VERSION) + { + report(stderr, + _("Routing message version %d not understood."), + ifm->ifm_version); + exit(1); + } + + if (ifm->ifm_type == RTM_IFINFO) + { + sdl = (struct sockaddr_dl *)(ifm + 1); + + if (!(strlen(iname) == sdl->sdl_nlen + && strncmp(iname, sdl->sdl_data, sdl->sdl_nlen) == 0)) + { + continue; + } + + if ( !(ifm->ifm_flags & IFF_UP) ) + { + /* the interface is down */ + goto get_ifinfo_end; + } + + ifindex = ifm->ifm_index; + ifinfo->rx_packets = ifm->ifm_data.ifi_ipackets; + ifinfo->tx_packets = ifm->ifm_data.ifi_opackets; + + break; + } + } + + if (ifindex < 0) + { + /* we did not find an interface with a matching name */ + report(stderr, _("No interface found with name %s"), iname); + goto get_ifinfo_end; + } + + /* now look for the interface's IP address */ + + next = buf; + while (next < lim) + { + ifam = (struct ifa_msghdr *)next; + next += ifam->ifam_msglen; + + if (ifindex > 0 + && ifam->ifam_type == RTM_NEWADDR + && ifam->ifam_index == ifindex) + { + /* Expand the compacted addresses */ + info.rti_addrs = ifam->ifam_addrs; + rt_xaddrs((char *)(ifam + 1), + ifam->ifam_msglen + (char *)ifam, + &info); + + /* Check for IPv4 address information only */ + if (info.rti_info[RTAX_IFA]->sa_family != AF_INET) + { + continue; + } + + rc = 1; + + sin = (struct sockaddr_in *)info.rti_info[RTAX_IFA]; + if (sin) + { + ifinfo->addr = sin->sin_addr; + } + + sin = (struct sockaddr_in *)info.rti_info[RTAX_NETMASK]; + if (!sin) + { + ifinfo->netmask = sin->sin_addr; + } + + /* note: RTAX_BRD contains the address at the other + * end of a point-to-point link or the broadcast address + * of non point-to-point link + */ + sin = (struct sockaddr_in *)info.rti_info[RTAX_BRD]; + if (!sin) + { + ifinfo->dstaddr = sin->sin_addr; + } + + break; + } + } + + if (rc == 0) + { + report(stderr, _("No IP address found for %s"), iname); + } + +get_ifinfo_end: + free(buf); + return rc; +} + +#endif /* __FREEBSD_USE_SYSCTL_GET_IFFINFO */ + #endif /* defined __FreeBSD__ */ |