1 /* 2 * msg.c 3 * 4 * Copyright (c) 1999 Whistle Communications, Inc. 5 * All rights reserved. 6 * 7 * Subject to the following obligations and disclaimer of warranty, use and 8 * redistribution of this software, in source or object code forms, with or 9 * without modifications are expressly permitted by Whistle Communications; 10 * provided, however, that: 11 * 1. Any and all reproductions of the source or object code must include the 12 * copyright notice above and the following disclaimer of warranties; and 13 * 2. No rights are granted, in any manner or form, to use Whistle 14 * Communications, Inc. trademarks, including the mark "WHISTLE 15 * COMMUNICATIONS" on advertising, endorsements, or otherwise except as 16 * such appears in the above copyright notice or in the software. 17 * 18 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND 19 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO 20 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE, 21 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF 22 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. 23 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY 24 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS 25 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE. 26 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES 27 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING 28 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 29 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR 30 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY 31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 33 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY 34 * OF SUCH DAMAGE. 35 * 36 * $Whistle: msg.c,v 1.2 1999/11/29 23:38:35 archie Exp $ 37 * $FreeBSD: src/usr.sbin/ngctl/msg.c,v 1.1.4.1 2000/07/27 22:05:36 archie Exp $ 38 * $DragonFly: src/usr.sbin/ngctl/msg.c,v 1.5 2007/06/04 00:40:31 swildner Exp $ 39 */ 40 41 #include "ngctl.h" 42 43 #define BUF_SIZE 4096 44 45 static int MsgCmd(int ac, const char **av); 46 47 const struct ngcmd msg_cmd = { 48 MsgCmd, 49 "msg path command [args ... ]", 50 "Send a netgraph control message to the node at \"path\"", 51 "The msg command constructs a netgraph control message from the" 52 " command name and ASCII arguments (if any) and sends that message" 53 " to the node. It does this by first asking the node to convert" 54 " the ASCII message into binary format, and resending the result.", 55 { "cmd" } 56 }; 57 58 static int 59 MsgCmd(int ac, const char **av) 60 { 61 char buf[BUF_SIZE]; 62 const char *path, *cmdstr; 63 int i; 64 65 /* Get arguments */ 66 if (ac < 3) 67 return(CMDRTN_USAGE); 68 path = av[1]; 69 cmdstr = av[2]; 70 71 /* Put command and arguments back together as one string */ 72 for (*buf = '\0', i = 3; i < ac; i++) { 73 snprintf(buf + strlen(buf), 74 sizeof(buf) - strlen(buf), " %s", av[i]); 75 } 76 77 /* Send it */ 78 if (NgSendAsciiMsg(csock, path, "%s%s", cmdstr, buf) < 0) { 79 warn("send msg"); 80 return(CMDRTN_ERROR); 81 } 82 83 /* See if a synchronous reply awaits */ 84 { 85 struct timeval tv; 86 fd_set rfds; 87 88 FD_ZERO(&rfds); 89 FD_SET(csock, &rfds); 90 memset(&tv, 0, sizeof(tv)); 91 switch (select(csock + 1, &rfds, NULL, NULL, &tv)) { 92 case -1: 93 err(EX_OSERR, "select"); 94 case 0: 95 break; 96 default: 97 MsgRead(); 98 break; 99 } 100 } 101 102 /* Done */ 103 return(CMDRTN_OK); 104 } 105 106 /* 107 * Read and display the next incoming control message 108 */ 109 void 110 MsgRead(void) 111 { 112 u_char buf[2 * sizeof(struct ng_mesg) + BUF_SIZE]; 113 struct ng_mesg *const m = (struct ng_mesg *)buf; 114 struct ng_mesg *const ascii = (struct ng_mesg *)m->data; 115 char path[NG_PATHSIZ]; 116 117 /* Get incoming message (in binary form) */ 118 if (NgRecvMsg(csock, m, sizeof(buf), path) < 0) { 119 warn("recv incoming message"); 120 return; 121 } 122 123 /* Ask originating node to convert message to ASCII */ 124 if (NgSendMsg(csock, path, NGM_GENERIC_COOKIE, 125 NGM_BINARY2ASCII, m, sizeof(*m) + m->header.arglen) < 0 126 || NgRecvMsg(csock, m, sizeof(buf), NULL) < 0) { 127 printf("Rec'd %s %d from \"%s\":\n", 128 (m->header.flags & NGF_RESP) != 0 ? "response" : "command", 129 m->header.cmd, path); 130 if (m->header.arglen == 0) 131 printf("No arguments\n"); 132 else 133 DumpAscii(m->data, m->header.arglen); 134 return; 135 } 136 137 /* Display message in ASCII form */ 138 printf("Rec'd %s \"%s\" (%d) from \"%s\":\n", 139 (ascii->header.flags & NGF_RESP) != 0 ? "response" : "command", 140 ascii->header.cmdstr, ascii->header.cmd, path); 141 if (*ascii->data != '\0') 142 printf("Args:\t%s\n", ascii->data); 143 else 144 printf("No arguments\n"); 145 } 146