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: src/usr.sbin/ngctl/msg.c,v 1.1.4.1 2000/07/27 22:05:36 archie Exp $ 39 * $DragonFly: src/usr.sbin/ngctl/msg.c,v 1.2 2003/06/17 04:29:57 dillon Exp $ 40 */ 41 42 #include "ngctl.h" 43 44 #define BUF_SIZE 4096 45 46 static int MsgCmd(int ac, char **av); 47 48 const struct ngcmd msg_cmd = { 49 MsgCmd, 50 "msg path command [args ... ]", 51 "Send a netgraph control message to the node at \"path\"", 52 "The msg command constructs a netgraph control message from the" 53 " command name and ASCII arguments (if any) and sends that message" 54 " to the node. It does this by first asking the node to convert" 55 " the ASCII message into binary format, and resending the result.", 56 { "cmd" } 57 }; 58 59 static int 60 MsgCmd(int ac, char **av) 61 { 62 char buf[BUF_SIZE]; 63 char *path, *cmdstr; 64 int i; 65 66 /* Get arguments */ 67 if (ac < 3) 68 return(CMDRTN_USAGE); 69 path = av[1]; 70 cmdstr = av[2]; 71 72 /* Put command and arguments back together as one string */ 73 for (*buf = '\0', i = 3; i < ac; i++) { 74 snprintf(buf + strlen(buf), 75 sizeof(buf) - strlen(buf), " %s", av[i]); 76 } 77 78 /* Send it */ 79 if (NgSendAsciiMsg(csock, path, "%s%s", cmdstr, buf) < 0) { 80 warn("send msg"); 81 return(CMDRTN_ERROR); 82 } 83 84 /* See if a synchronous reply awaits */ 85 { 86 struct timeval tv; 87 fd_set rfds; 88 89 FD_ZERO(&rfds); 90 FD_SET(csock, &rfds); 91 memset(&tv, 0, sizeof(tv)); 92 switch (select(csock + 1, &rfds, NULL, NULL, &tv)) { 93 case -1: 94 err(EX_OSERR, "select"); 95 case 0: 96 break; 97 default: 98 MsgRead(); 99 break; 100 } 101 } 102 103 /* Done */ 104 return(CMDRTN_OK); 105 } 106 107 /* 108 * Read and display the next incoming control message 109 */ 110 void 111 MsgRead() 112 { 113 u_char buf[2 * sizeof(struct ng_mesg) + BUF_SIZE]; 114 struct ng_mesg *const m = (struct ng_mesg *)buf; 115 struct ng_mesg *const ascii = (struct ng_mesg *)m->data; 116 char path[NG_PATHLEN+1]; 117 118 /* Get incoming message (in binary form) */ 119 if (NgRecvMsg(csock, m, sizeof(buf), path) < 0) { 120 warn("recv incoming message"); 121 return; 122 } 123 124 /* Ask originating node to convert message to ASCII */ 125 if (NgSendMsg(csock, path, NGM_GENERIC_COOKIE, 126 NGM_BINARY2ASCII, m, sizeof(*m) + m->header.arglen) < 0 127 || NgRecvMsg(csock, m, sizeof(buf), NULL) < 0) { 128 printf("Rec'd %s %d from \"%s\":\n", 129 (m->header.flags & NGF_RESP) != 0 ? "response" : "command", 130 m->header.cmd, path); 131 if (m->header.arglen == 0) 132 printf("No arguments\n"); 133 else 134 DumpAscii(m->data, m->header.arglen); 135 return; 136 } 137 138 /* Display message in ASCII form */ 139 printf("Rec'd %s \"%s\" (%d) from \"%s\":\n", 140 (ascii->header.flags & NGF_RESP) != 0 ? "response" : "command", 141 ascii->header.cmdstr, ascii->header.cmd, path); 142 if (*ascii->data != '\0') 143 printf("Args:\t%s\n", ascii->data); 144 else 145 printf("No arguments\n"); 146 } 147 148