lib/libdmsg/subs.c

   1 /*
   2  * Copyright (c) 2011-2012 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Matthew Dillon <dillon@dragonflybsd.org>
   6  * by Venkatesh Srinivas <vsrinivas@dragonflybsd.org>
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in
  16  *    the documentation and/or other materials provided with the
  17  *    distribution.
  18  * 3. Neither the name of The DragonFly Project nor the names of its
  19  *    contributors may be used to endorse or promote products derived
  20  *    from this software without specific, prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  23  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  24  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  25  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  26  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  27  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  28  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  29  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  30  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  31  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  32  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include "dmsg_local.h"
  37
  38 /*
  39  * Allocation wrappers give us shims for possible future use
  40  */
  41 void *
  42 dmsg_alloc(size_t bytes)
  43 {
  44         void *ptr;
  45
  46         ptr = malloc(bytes);
  47         assert(ptr);
  48         bzero(ptr, bytes);
  49         return (ptr);
  50 }
  51
  52 void
  53 dmsg_free(void *ptr)
  54 {
  55         free(ptr);
  56 }
  57
  58 const char *
  59 dmsg_uuid_to_str(uuid_t *uuid, char **strp)
  60 {
  61         uint32_t status;
  62         if (*strp) {
  63                 free(*strp);
  64                 *strp = NULL;
  65         }
  66         uuid_to_string(uuid, strp, &status);
  67         return (*strp);
  68 }
  69
  70 const char *
  71 dmsg_peer_type_to_str(uint8_t type)
  72 {
  73         switch(type) {
  74         case DMSG_PEER_NONE:
  75                 return("NONE");
  76         case DMSG_PEER_ROUTER:
  77                 return("ROUTER");
  78         case DMSG_PEER_BLOCK:
  79                 return("BLOCK");
  80         case DMSG_PEER_HAMMER2:
  81                 return("HAMMER2");
  82         case DMSG_PEER_CLIENT:
  83                 return("CLIENT");
  84         default:
  85                 return("?PEERTYPE?");
  86         }
  87 }
  88
  89 int
  90 dmsg_connect(const char *hostname)
  91 {
  92         struct sockaddr_in lsin;
  93         struct hostent *hen;
  94         int fd;
  95         int opt;
  96
  97         /*
  98          * Acquire socket and set options
  99          */
 100         if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
 101                 dm_printf(1, "cmd_debug: socket(): %s\n",
 102                           strerror(errno));
 103                 return -1;
 104         }
 105         opt = 1;
 106         setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof opt);
 107
 108         /*
 109          * Connect to the target
 110          */
 111         bzero(&lsin, sizeof(lsin));
 112         lsin.sin_family = AF_INET;
 113         lsin.sin_addr.s_addr = 0;
 114         lsin.sin_port = htons(DMSG_LISTEN_PORT);
 115
 116         if (hostname) {
 117                 hen = gethostbyname2(hostname, AF_INET);
 118                 if (hen == NULL) {
 119                         if (inet_pton(AF_INET, hostname, &lsin.sin_addr) != 1) {
 120                                 dm_printf(3, "Cannot resolve %s\n", hostname);
 121                                 return -1;
 122                         }
 123                 } else {
 124                         bcopy(hen->h_addr, &lsin.sin_addr, hen->h_length);
 125                 }
 126         }
 127         if (connect(fd, (struct sockaddr *)&lsin, sizeof(lsin)) < 0) {
 128                 close(fd);
 129                 if (DMsgDebugOpt > 2) {
 130                         dm_printf(3, "debug: Connect failed: %s\n",
 131                                   strerror(errno));
 132                 }
 133                 return -1;
 134         }
 135         return (fd);
 136 }