diff options
Diffstat (limited to 'interface.c')
| -rw-r--r-- | interface.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/interface.c b/interface.c index 85ca85d8..dce5267e 100644 --- a/interface.c +++ b/interface.c @@ -14,13 +14,11 @@ #ifdef linux #include <stdio.h> -#include <stdlib.h> #include <string.h> #include <unistd.h> #include <sys/ioctl.h> #include <netinet/in.h> #include <linux/netdevice.h> -#include <errno.h> #include "fetchmail.h" static struct in_addr interface_address; @@ -47,9 +45,8 @@ static int _get_ifinfo_(int socket_fd, FILE *stats_file, const char *ifname, /* see if the interface is up */ strcpy(request.ifr_name, ifname); - errno = 0; if (ioctl(socket_fd, SIOCGIFFLAGS, &request) < 0) - error(PS_IOERR, errno, "interface status check failed"); + return(FALSE); if (!(request.ifr_flags & IFF_RUNNING)) return(FALSE); @@ -106,7 +103,9 @@ static int get_ifinfo(const char *ifname, ifinfo_t *ifinfo) void interface_parse(void) { + int socket_fd = socket(AF_INET, SOCK_DGRAM, 0); char *cp1, *cp2; + struct ifreq request; /* in the event we point to a null string, make pointer null */ if (interface && !*interface) @@ -123,6 +122,13 @@ void interface_parse(void) (void) error(PS_SYNTAX, 0, "missing IP interface address"); *cp1++ = '\000'; + /* validate specified interface exists */ + strcpy(request.ifr_name, interface); + if (ioctl(socket_fd, SIOCGIFFLAGS, &request) < 0) + (void) error(PS_SYNTAX, 0, "no such interface device '%s'", + interface); + close(socket_fd); + /* find and isolate just the netmask */ if (!(cp2 = strchr(cp1, '/'))) cp2 = "255.255.255.255"; |