1 /* 2 * Copyright (c) 2003, Trent Nelson, <trent@arpa.com>. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTIFSTAT_ERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD: src/usr.bin/systat/ifstat.c,v 1.1 2003/01/04 22:07:24 phk Exp $ 29 * $DragonFly: src/usr.bin/systat/ifstat.c,v 1.2 2005/01/03 23:47:20 joerg Exp $ 30 */ 31 32 #include <sys/types.h> 33 #include <sys/socket.h> 34 #include <sys/sysctl.h> 35 #include <sys/time.h> 36 #include <sys/queue.h> 37 #include <net/if.h> 38 #include <net/if_mib.h> 39 #include <net/if_types.h> /* For IFT_ETHER */ 40 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <unistd.h> 44 #include <float.h> 45 #include <err.h> 46 #include <errno.h> 47 48 #include "systat.h" 49 #include "extern.h" 50 #include "mode.h" 51 #include "convtbl.h" 52 53 /* Column numbers */ 54 55 #define C1 0 /* 0-19 */ 56 #define C2 20 /* 20-39 */ 57 #define C3 40 /* 40-59 */ 58 #define C4 60 /* 60-80 */ 59 #define C5 80 /* Used for label positioning. */ 60 61 static int col0 = 0; 62 static int col1 = C1; 63 static int col2 = C2; 64 static int col3 = C3; 65 static int col4 = C4; 66 static int col5 = C5; 67 68 69 SLIST_HEAD(, if_stat) curlist; 70 SLIST_HEAD(, if_stat_disp) displist; 71 72 struct if_stat { 73 SLIST_ENTRY(if_stat) link; 74 char if_name[IF_NAMESIZE]; 75 struct ifmibdata if_mib; 76 struct timeval tv; 77 struct timeval tv_lastchanged; 78 u_long if_in_curtraffic; 79 u_long if_out_curtraffic; 80 u_long if_in_traffic_peak; 81 u_long if_out_traffic_peak; 82 u_int if_row; /* Index into ifmib sysctl */ 83 u_int if_ypos; /* 0 if not being displayed */ 84 u_int display; 85 }; 86 87 extern u_int curscale; 88 89 static void right_align_string(const struct if_stat *); 90 static void getifmibdata(const int, struct ifmibdata *); 91 static void sort_interface_list(void); 92 static u_int getifnum(void); 93 94 #define IFSTAT_ERR(n, s) do { \ 95 putchar(' '); \ 96 closeifstat(wnd); \ 97 err((n), (s)); \ 98 } while (0) 99 100 #define STARTING_ROW (8) 101 #define ROW_SPACING (3) 102 103 #define TOPLINE 5 104 #define TOPLABEL \ 105 " Interface Traffic Peak Total" 106 107 #define CLEAR_LINE(y, x) do { \ 108 wmove(wnd, y, x); \ 109 wclrtoeol(wnd); \ 110 } while (0) 111 112 #define IN_col2 (ifp->if_in_curtraffic) 113 #define OUT_col2 (ifp->if_out_curtraffic) 114 #define IN_col3 (ifp->if_in_traffic_peak) 115 #define OUT_col3 (ifp->if_out_traffic_peak) 116 #define IN_col4 (ifp->if_mib.ifmd_data.ifi_ibytes) 117 #define OUT_col4 (ifp->if_mib.ifmd_data.ifi_obytes) 118 119 #define EMPTY_COLUMN " " 120 #define CLEAR_COLUMN(y, x) mvprintw((y), (x), "%20s", EMPTY_COLUMN); 121 122 #define DOPUTRATE(c, r, d) do { \ 123 CLEAR_COLUMN(r, c); \ 124 mvprintw(r, (c), "%10.3f %s%s ", \ 125 convert(d##_##c, curscale), \ 126 get_string(d##_##c, curscale), \ 127 "/s"); \ 128 } while (0) 129 130 #define DOPUTTOTAL(c, r, d) do { \ 131 CLEAR_COLUMN((r), (c)); \ 132 mvprintw((r), (c), "%12.3f %s ", \ 133 convert(d##_##c, SC_AUTO), \ 134 get_string(d##_##c, SC_AUTO)); \ 135 } while (0) 136 137 #define PUTRATE(c, r) do { \ 138 DOPUTRATE(c, (r), IN); \ 139 DOPUTRATE(c, (r)+1, OUT); \ 140 } while (0) 141 142 #define PUTTOTAL(c, r) do { \ 143 DOPUTTOTAL(c, (r), IN); \ 144 DOPUTTOTAL(c, (r)+1, OUT); \ 145 } while (0) 146 147 #define PUTNAME(p) do { \ 148 mvprintw(p->if_ypos, 0, "%s", p->if_name); \ 149 mvprintw(p->if_ypos, col2-3, "%s", (const char *)"in"); \ 150 mvprintw(p->if_ypos+1, col2-3, "%s", (const char *)"out"); \ 151 } while (0) 152 153 154 WINDOW * 155 openifstat(void) 156 { 157 return (subwin(stdscr, LINES-1-5, 0, 5, 0)); 158 } 159 160 void 161 closeifstat(WINDOW *w) 162 { 163 struct if_stat *node = NULL; 164 165 while (!SLIST_EMPTY(&curlist)) { 166 node = SLIST_FIRST(&curlist); 167 SLIST_REMOVE_HEAD(&curlist, link); 168 free(node); 169 } 170 171 if (w != NULL) { 172 wclear(w); 173 wrefresh(w); 174 delwin(w); 175 } 176 177 return; 178 } 179 180 181 void 182 labelifstat(void) 183 { 184 185 wmove(wnd, TOPLINE, 0); 186 wclrtoeol(wnd); 187 mvprintw(TOPLINE, 0, "%s", TOPLABEL); 188 189 return; 190 } 191 192 void 193 showifstat(void) 194 { 195 struct if_stat *ifp = NULL; 196 SLIST_FOREACH(ifp, &curlist, link) { 197 if (ifp->display == 0) 198 continue; 199 PUTNAME(ifp); 200 PUTRATE(col2, ifp->if_ypos); 201 PUTRATE(col3, ifp->if_ypos); 202 PUTTOTAL(col4, ifp->if_ypos); 203 } 204 205 return; 206 } 207 208 int 209 initifstat(void) 210 { 211 struct if_stat *p = NULL; 212 u_int n = 0, i = 0; 213 214 n = getifnum(); 215 if (n <= 0) 216 return -1; 217 218 SLIST_INIT(&curlist); 219 220 for (i = 0; i < n; i++) { 221 p = (struct if_stat *)malloc(sizeof(struct if_stat)); 222 if (p == NULL) 223 IFSTAT_ERR(1, "out of memory"); 224 memset((void *)p, 0, sizeof(struct if_stat)); 225 SLIST_INSERT_HEAD(&curlist, p, link); 226 p->if_row = i+1; 227 getifmibdata(p->if_row, &p->if_mib); 228 right_align_string(p); 229 230 /* 231 * Initially, we only display interfaces that have 232 * received some traffic. 233 */ 234 if (p->if_mib.ifmd_data.ifi_ibytes != 0) 235 p->display = 1; 236 } 237 238 sort_interface_list(); 239 240 return 1; 241 } 242 243 void 244 fetchifstat(void) 245 { 246 struct if_stat *ifp = NULL; 247 struct timeval tv, new_tv, old_tv; 248 double elapsed = 0.0; 249 u_int new_inb, new_outb, old_inb, old_outb = 0; 250 u_int error = 0; 251 u_int we_need_to_sort_interface_list = 0; 252 253 SLIST_FOREACH(ifp, &curlist, link) { 254 /* 255 * Grab a copy of the old input/output values before we 256 * call getifmibdata(). 257 */ 258 old_inb = ifp->if_mib.ifmd_data.ifi_ibytes; 259 old_outb = ifp->if_mib.ifmd_data.ifi_obytes; 260 ifp->tv_lastchanged = ifp->if_mib.ifmd_data.ifi_lastchange; 261 262 error = gettimeofday(&new_tv, (struct timezone *)0); 263 if (error) 264 IFSTAT_ERR(2, "error getting time of day"); 265 (void)getifmibdata(ifp->if_row, &ifp->if_mib); 266 267 268 new_inb = ifp->if_mib.ifmd_data.ifi_ibytes; 269 new_outb = ifp->if_mib.ifmd_data.ifi_obytes; 270 271 /* Display interface if it's received some traffic. */ 272 if (new_inb > 0 && old_inb == 0) { 273 ifp->display = 1; 274 we_need_to_sort_interface_list++; 275 } 276 277 /* 278 * The rest is pretty trivial. Calculate the new values 279 * for our current traffic rates, and while we're there, 280 * see if we have new peak rates. 281 */ 282 old_tv = ifp->tv; 283 timersub(&new_tv, &old_tv, &tv); 284 elapsed = tv.tv_sec + (tv.tv_usec * 1e-6); 285 286 ifp->if_in_curtraffic = new_inb - old_inb; 287 ifp->if_out_curtraffic = new_outb - old_outb; 288 289 /* 290 * Rather than divide by the time specified on the comm- 291 * and line, we divide by ``elapsed'' as this is likely 292 * to be more accurate. 293 */ 294 ifp->if_in_curtraffic /= elapsed; 295 ifp->if_out_curtraffic /= elapsed; 296 297 if (ifp->if_in_curtraffic > ifp->if_in_traffic_peak) 298 ifp->if_in_traffic_peak = ifp->if_in_curtraffic; 299 300 if (ifp->if_out_curtraffic > ifp->if_out_traffic_peak) 301 ifp->if_out_traffic_peak = ifp->if_out_curtraffic; 302 303 ifp->tv.tv_sec = new_tv.tv_sec; 304 ifp->tv.tv_usec = new_tv.tv_usec; 305 306 } 307 308 if (we_need_to_sort_interface_list) 309 sort_interface_list(); 310 311 return; 312 } 313 314 /* 315 * We want to right justify our interface names against the first column 316 * (first sixteen or so characters), so we need to do some alignment. 317 */ 318 static void 319 right_align_string(const struct if_stat *ifp) 320 { 321 int str_len = 0, pad_len = 0; 322 char *newstr = NULL, *ptr = NULL; 323 324 if (ifp == NULL || ifp->if_mib.ifmd_name == NULL) 325 return; 326 else { 327 /* string length + '\0' */ 328 str_len = strlen(ifp->if_mib.ifmd_name)+1; 329 pad_len = IF_NAMESIZE-(str_len); 330 331 newstr = (char *)ifp->if_name; 332 ptr = newstr + pad_len; 333 (void)memset((void *)newstr, (int)' ', IF_NAMESIZE); 334 (void)strncpy(ptr, (const char *)&ifp->if_mib.ifmd_name, 335 str_len); 336 } 337 338 return; 339 } 340 341 /* 342 * This function iterates through our list of interfaces, identifying 343 * those that are to be displayed (ifp->display = 1). For each interf- 344 * rface that we're displaying, we generate an appropriate position for 345 * it on the screen (ifp->if_ypos). 346 * 347 * This function is called any time a change is made to an interface's 348 * ``display'' state. 349 */ 350 void 351 sort_interface_list(void) 352 { 353 struct if_stat *ifp = NULL; 354 u_int y = 0; 355 356 y = STARTING_ROW; 357 SLIST_FOREACH(ifp, &curlist, link) { 358 if (ifp->display) { 359 ifp->if_ypos = y; 360 y += ROW_SPACING; 361 } 362 } 363 } 364 365 static 366 unsigned int 367 getifnum(void) 368 { 369 int error = 0; 370 u_int data = 0; 371 size_t datalen = 0; 372 static int name[] = { CTL_NET, 373 PF_LINK, 374 NETLINK_GENERIC, 375 IFMIB_SYSTEM, 376 IFMIB_IFCOUNT }; 377 378 datalen = sizeof(data); 379 error = sysctl(name, 380 5, 381 (void *)&data, 382 (size_t *)&datalen, 383 (void *)NULL, 384 (size_t)0); 385 if (error) 386 IFSTAT_ERR(1, "sysctl error"); 387 return data; 388 } 389 390 static void 391 getifmibdata(int row, struct ifmibdata *data) 392 { 393 int error = 0; 394 size_t datalen = 0; 395 static int name[] = { CTL_NET, 396 PF_LINK, 397 NETLINK_GENERIC, 398 IFMIB_IFDATA, 399 0, 400 IFDATA_GENERAL }; 401 datalen = sizeof(*data); 402 name[4] = row; 403 404 errno = 0; 405 error = sysctl(name, 406 6, 407 (void *)data, 408 (size_t *)&datalen, 409 (void *)NULL, 410 (size_t)0); 411 if (error != 0 && errno != ENOENT) 412 IFSTAT_ERR(2, "sysctl error getting interface data"); 413 } 414 415 int 416 cmdifstat(char *cmd, char *args) 417 { 418 int retval = 0; 419 420 retval = ifcmd(cmd, args); 421 /* ifcmd() returns 1 on success */ 422 if (retval == 1) { 423 showifstat(); 424 refresh(); 425 } 426 427 return retval; 428 } 429