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pcg |
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/*--------------------------------*-C-*---------------------------------* |
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* File: netdisp.c |
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*----------------------------------------------------------------------* |
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* |
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* All portions of code are copyright by their respective author/s. |
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* Copyright (c) 1996 Chuck Blake <cblake@BBN.COM> |
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* - original version |
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* Copyright (c) 1997 mj olesen <olesen@me.queensu.ca> |
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* Copyright (c) 1997,1998 Oezguer Kesim <kesim@math.fu-berlin.de> |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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*----------------------------------------------------------------------*/ |
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/*----------------------------------------------------------------------* |
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* support for resolving the actual IP number of the host for remote |
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* DISPLAYs. When the display is local (i.e. :0), we add support for |
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* sending the first non-loopback interface IP number as the DISPLAY |
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* instead of just sending the incorrect ":0". This way telnet/rlogin |
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* shells can actually get the correct information into DISPLAY for |
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* xclients. |
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*----------------------------------------------------------------------*/ |
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#include "../config.h" /* NECESSARY */ |
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#include "rxvt.h" /* NECESSARY */ |
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#ifdef DISPLAY_IS_IP |
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#include "netdisp.h" |
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/*----------------------------------------------------------------------*/ |
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/* return NULL a pointer to buffer which may be freed */ |
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char * |
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rxvt_network_display(const char *display) |
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{ |
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char buffer[1024], *rval = NULL; |
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struct ifconf ifc; |
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struct ifreq *ifr; |
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int i, skfd; |
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if (display[0] != ':' && STRNCMP(display, "unix:", 5)) |
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return (char *) display; /* nothing to do */ |
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ifc.ifc_len = sizeof(buffer); /* Get names of all ifaces */ |
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ifc.ifc_buf = buffer; |
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if ((skfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { |
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perror("socket"); |
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return NULL; |
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} |
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if (ioctl(skfd, SIOCGIFCONF, &ifc) < 0) { |
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perror("SIOCGIFCONF"); |
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close(skfd); |
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return NULL; |
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} |
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for (i = 0, ifr = ifc.ifc_req; |
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i < (ifc.ifc_len / sizeof(struct ifreq)); |
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i++, ifr++) { |
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struct ifreq ifr2; |
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STRCPY(ifr2.ifr_name, ifr->ifr_name); |
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if (ioctl(skfd, SIOCGIFADDR, &ifr2) >= 0) { |
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unsigned long addr; |
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struct sockaddr_in *p_addr; |
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p_addr = (struct sockaddr_in *)&(ifr2.ifr_addr); |
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addr = htonl((unsigned long)p_addr->sin_addr.s_addr); |
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/* |
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* not "0.0.0.0" or "127.0.0.1" - so format the address |
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*/ |
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if (addr && addr != 0x7F000001) { |
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char *colon = STRCHR(display, ':'); |
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if (colon == NULL) |
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colon = ":0.0"; |
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rval = rxvt_malloc(STRLEN(colon) + 16); |
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sprintf(rval, "%d.%d.%d.%d%s", |
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(int)((addr >> 030) & 0xFF), |
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(int)((addr >> 020) & 0xFF), |
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(int)((addr >> 010) & 0xFF), |
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(int)(addr & 0xFF), colon); |
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break; |
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} |
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} |
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} |
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close(skfd); |
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return rval; |
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} |
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#endif /* DISPLAY_IS_IP */ |
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/*----------------------- end-of-file (C source) -----------------------*/ |
