1 2 /* 3 * msg.c 4 * 5 * Copyright (c) 1999 Whistle Communications, Inc. 6 * All rights reserved. 7 * 8 * Subject to the following obligations and disclaimer of warranty, use and 9 * redistribution of this software, in source or object code forms, with or 10 * without modifications are expressly permitted by Whistle Communications; 11 * provided, however, that: 12 * 1. Any and all reproductions of the source or object code must include the 13 * copyright notice above and the following disclaimer of warranties; and 14 * 2. No rights are granted, in any manner or form, to use Whistle 15 * Communications, Inc. trademarks, including the mark "WHISTLE 16 * COMMUNICATIONS" on advertising, endorsements, or otherwise except as 17 * such appears in the above copyright notice or in the software. 18 * 19 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND 20 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO 21 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE, 22 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF 23 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. 24 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY 25 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS 26 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE. 27 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES 28 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING 29 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 30 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR 31 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY 32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 34 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY 35 * OF SUCH DAMAGE. 36 * 37 * $Whistle: msg.c,v 1.2 1999/11/29 23:38:35 archie Exp $ 38 * $FreeBSD$ 39 */ 40 41 #include "ngctl.h" 42 43 static int MsgCmd(int ac, char **av); 44 45 const struct ngcmd msg_cmd = { 46 MsgCmd, 47 "msg path command [args ... ]", 48 "Send a netgraph control message to the node at \"path\"", 49 "The msg command constructs a netgraph control message from the" 50 " command name and ASCII arguments (if any) and sends that message" 51 " to the node. It does this by first asking the node to convert" 52 " the ASCII message into binary format, and resending the result.", 53 { "cmd" } 54 }; 55 56 static int 57 MsgCmd(int ac, char **av) 58 { 59 char *buf; 60 char *path, *cmdstr; 61 int i, len; 62 63 /* Get arguments */ 64 if (ac < 3) 65 return(CMDRTN_USAGE); 66 path = av[1]; 67 cmdstr = av[2]; 68 69 /* Put command and arguments back together as one string */ 70 for (len = 1, i = 3; i < ac; i++) 71 len += strlen(av[i]) + 1; 72 if ((buf = malloc(len)) == NULL) { 73 warn("malloc"); 74 return(CMDRTN_ERROR); 75 } 76 for (*buf = '\0', i = 3; i < ac; i++) { 77 snprintf(buf + strlen(buf), 78 len - strlen(buf), " %s", av[i]); 79 } 80 81 /* Send it */ 82 if (NgSendAsciiMsg(csock, path, "%s%s", cmdstr, buf) < 0) { 83 free(buf); 84 warn("send msg"); 85 return(CMDRTN_ERROR); 86 } 87 free(buf); 88 89 /* See if a synchronous reply awaits */ 90 { 91 struct timeval tv; 92 fd_set rfds; 93 94 FD_ZERO(&rfds); 95 FD_SET(csock, &rfds); 96 memset(&tv, 0, sizeof(tv)); 97 switch (select(csock + 1, &rfds, NULL, NULL, &tv)) { 98 case -1: 99 err(EX_OSERR, "select"); 100 case 0: 101 break; 102 default: 103 MsgRead(); 104 break; 105 } 106 } 107 108 /* Done */ 109 return(CMDRTN_OK); 110 } 111 112 /* 113 * Read and display the next incoming control message 114 */ 115 void 116 MsgRead() 117 { 118 struct ng_mesg *m, *m2; 119 struct ng_mesg *ascii; 120 char path[NG_PATHSIZ]; 121 122 /* Get incoming message (in binary form) */ 123 if (NgAllocRecvMsg(csock, &m, path) < 0) { 124 warn("recv incoming message"); 125 return; 126 } 127 128 /* Ask originating node to convert message to ASCII */ 129 if (NgSendMsg(csock, path, NGM_GENERIC_COOKIE, 130 NGM_BINARY2ASCII, m, sizeof(*m) + m->header.arglen) < 0 131 || NgAllocRecvMsg(csock, &m2, NULL) < 0) { 132 printf("Rec'd %s %d from \"%s\":\n", 133 (m->header.flags & NGF_RESP) != 0 ? "response" : "command", 134 m->header.cmd, path); 135 if (m->header.arglen == 0) 136 printf("No arguments\n"); 137 else 138 DumpAscii(m->data, m->header.arglen); 139 free(m); 140 return; 141 } 142 143 /* Display message in ASCII form */ 144 free(m); 145 ascii = (struct ng_mesg *)m2->data; 146 printf("Rec'd %s \"%s\" (%d) from \"%s\":\n", 147 (ascii->header.flags & NGF_RESP) != 0 ? "response" : "command", 148 ascii->header.cmdstr, ascii->header.cmd, path); 149 if (*ascii->data != '\0') 150 printf("Args:\t%s\n", ascii->data); 151 else 152 printf("No arguments\n"); 153 free(m2); 154 } 155 156