roy.marples.name Git - dhcpcd-ui/blob - src/libdhcpcd/misc.c

   1 /*
   2  * libdhcpcd
   3  * Copyright 2009-2014 Roy Marples <roy@marples.name>
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 #include <arpa/inet.h>
  28
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32
  33 #include <libintl.h>
  34
  35 #define IN_LIBDHCPCD
  36 #include "libdhcpcd.h"
  37
  38 #define _ gettext
  39
  40 char *
  41 dhcpcd_if_message(const DHCPCD_IF *i)
  42 {
  43         char *msg, *p;
  44         const char *reason = NULL;
  45         size_t len;
  46         bool showip, showssid;
  47         char buf[INET6_ADDRSTRLEN];
  48
  49         /* Don't report non SLAAC configurations */
  50         if (strcmp(i->type, "ra") == 0 &&
  51             IN6_IS_ADDR_UNSPECIFIED(&i->prefix) &&
  52             i->up)
  53                 return NULL;
  54
  55         showip = true;
  56         showssid = false;
  57         if (strcmp(i->reason, "EXPIRE") == 0)
  58                 reason = _("Expired");
  59         else if (strcmp(i->reason, "CARRIER") == 0) {
  60                 if (i->wireless) {
  61                         reason = _("Associated with");
  62                         if (*i->ssid != '\0')
  63                                 showssid = true;
  64                 } else
  65                         reason = _("Cable plugged in");
  66                 showip = false;
  67         } else if (strcmp(i->reason, "NOCARRIER") == 0) {
  68                 if (i->wireless) {
  69                         if (*i->ssid != '\0' || i->ip.s_addr != 0) {
  70                                 reason = _("Disassociated from");
  71                                 showssid = true;
  72                         } else
  73                                 reason = _("Not associated");
  74                 } else
  75                         reason = _("Cable unplugged");
  76                 showip = false;
  77         } else if (strcmp(i->reason, "UNKNOWN") == 0)
  78                 reason = _("Unknown link state");
  79         else if (strcmp(i->reason, "FAIL") == 0)
  80                 reason = _("Automatic configuration not possible");
  81         else if (strcmp(i->reason, "3RDPARTY") == 0)
  82                 reason = _("Waiting for 3rd Party configuration");
  83
  84         if (reason == NULL) {
  85                 if (i->up)
  86                         reason = _("Configured");
  87                 else if (strcmp(i->type, "ra") == 0)
  88                         reason = "Expired RA";
  89                 else
  90                         reason = i->reason;
  91         }
  92
  93         len = strlen(i->ifname) + 3;
  94         len += strlen(reason) + 1;
  95         if (i->ip.s_addr != 0) {
  96                 len += 16; /* 000. * 4 */
  97                 if (i->cidr != 0)
  98                         len += 3; /* /32 */
  99         } else if (!IN6_IS_ADDR_UNSPECIFIED(&i->ip6)) {
 100                 len += INET6_ADDRSTRLEN;
 101         } else if (!IN6_IS_ADDR_UNSPECIFIED(&i->prefix)) {
 102                 len += INET6_ADDRSTRLEN;
 103                 if (i->prefix_len != 0)
 104                         len += 4;
 105         }
 106         if (showssid)
 107                 len += strlen(i->ssid) + 1;
 108         msg = p = malloc(len);
 109         if (msg == NULL)
 110                 return NULL;
 111         p += snprintf(msg, len, "%s: %s", i->ifname, reason);
 112         if (showssid)
 113                 p += snprintf(p, len - (size_t)(p - msg), " %s", i->ssid);
 114         if (i->ip.s_addr != 0 && showip) {
 115                 p += snprintf(p, len - (size_t)(p - msg), " %s",
 116                     inet_ntoa(i->ip));
 117                 if (i->cidr != 0)
 118                         snprintf(p, len - (size_t)(p - msg), "/%d", i->cidr);
 119         } else if (!IN6_IS_ADDR_UNSPECIFIED(&i->ip6) && showip) {
 120                 p += snprintf(p, len - (size_t)(p - msg), " %s",
 121                     inet_ntop(AF_INET6, &i->ip6, buf, INET6_ADDRSTRLEN));
 122         } else if (!IN6_IS_ADDR_UNSPECIFIED(&i->prefix) && showip) {
 123                 p += snprintf(p, len - (size_t)(p - msg), " %s",
 124                     inet_ntop(AF_INET6, &i->prefix, buf, INET6_ADDRSTRLEN));
 125                 if (i->prefix_len != 0)
 126                         snprintf(p, len - (size_t)(p - msg),
 127                             "/%d", i->prefix_len);
 128         }
 129         return msg;
 130 }