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 1.5 2008/11/10 04:59:45 swildner Exp $ 30 */ 31 32 #include <sys/cdefs.h> 33 #include <sys/types.h> 34 #include <sys/socket.h> 35 #include <sys/sysctl.h> 36 #include <sys/time.h> 37 #include <sys/queue.h> 38 #include <net/if.h> 39 #include <net/if_mib.h> 40 #include <net/if_types.h> /* For IFT_ETHER */ 41 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 #include <unistd.h> 46 #include <float.h> 47 #include <err.h> 48 #include <errno.h> 49 50 #include "systat.h" 51 #include "extern.h" 52 #include "mode.h" 53 #include "convtbl.h" 54 55 /* Column numbers */ 56 57 #define C1 0 /* 0-19 */ 58 #define C2 20 /* 20-39 */ 59 #define C3 40 /* 40-59 */ 60 #define C4 60 /* 60-80 */ 61 #define C5 80 /* Used for label positioning. */ 62 63 static const int col1 = C1; 64 static const int col2 = C2; 65 static const int col3 = C3; 66 static const int col4 = C4; 67 static const int col5 = C5; 68 69 70 SLIST_HEAD(, if_stat) curlist; 71 SLIST_HEAD(, if_stat_disp) displist; 72 73 struct if_stat { 74 SLIST_ENTRY(if_stat) link; 75 char if_name[IF_NAMESIZE]; 76 struct ifmibdata if_mib; 77 struct timeval tv; 78 struct timeval tv_lastchanged; 79 u_long if_in_curtraffic; 80 u_long if_out_curtraffic; 81 u_long if_in_traffic_peak; 82 u_long if_out_traffic_peak; 83 u_int if_row; /* Index into ifmib sysctl */ 84 u_int if_ypos; /* 0 if not being displayed */ 85 u_int display; 86 }; 87 88 extern u_int curscale; 89 90 static void right_align_string(const struct if_stat *); 91 static void getifmibdata(const int, struct ifmibdata *); 92 static void sort_interface_list(void); 93 static u_int getifnum(void); 94 95 #define IFSTAT_ERR(n, s) do { \ 96 putchar(' '); \ 97 closeifstat(wnd); \ 98 err((n), (s)); \ 99 } while (0) 100 101 #define STARTING_ROW (8) 102 #define ROW_SPACING (3) 103 104 #define TOPLINE 5 105 #define TOPLABEL \ 106 " Interface Traffic Peak Total" 107 108 #define CLEAR_LINE(y, x) do { \ 109 wmove(wnd, y, x); \ 110 wclrtoeol(wnd); \ 111 } while (0) 112 113 #define IN_col2 (ifp->if_in_curtraffic) 114 #define OUT_col2 (ifp->if_out_curtraffic) 115 #define IN_col3 (ifp->if_in_traffic_peak) 116 #define OUT_col3 (ifp->if_out_traffic_peak) 117 #define IN_col4 (ifp->if_mib.ifmd_data.ifi_ibytes) 118 #define OUT_col4 (ifp->if_mib.ifmd_data.ifi_obytes) 119 120 #define EMPTY_COLUMN " " 121 #define CLEAR_COLUMN(y, x) mvprintw((y), (x), "%20s", EMPTY_COLUMN); 122 123 #define DOPUTRATE(c, r, d) do { \ 124 CLEAR_COLUMN(r, c); \ 125 mvprintw(r, (c), "%10.3f %s%s ", \ 126 convert(d##_##c, curscale), \ 127 get_string(d##_##c, curscale), \ 128 "/s"); \ 129 } while (0) 130 131 #define DOPUTTOTAL(c, r, d) do { \ 132 CLEAR_COLUMN((r), (c)); \ 133 mvprintw((r), (c), "%12.3f %s ", \ 134 convert(d##_##c, SC_AUTO), \ 135 get_string(d##_##c, SC_AUTO)); \ 136 } while (0) 137 138 #define PUTRATE(c, r) do { \ 139 DOPUTRATE(c, (r), IN); \ 140 DOPUTRATE(c, (r)+1, OUT); \ 141 } while (0) 142 143 #define PUTTOTAL(c, r) do { \ 144 DOPUTTOTAL(c, (r), IN); \ 145 DOPUTTOTAL(c, (r)+1, OUT); \ 146 } while (0) 147 148 #define PUTNAME(p) do { \ 149 mvprintw(p->if_ypos, 0, "%s", p->if_name); \ 150 mvprintw(p->if_ypos, col2-3, "%s", (const char *)"in"); \ 151 mvprintw(p->if_ypos+1, col2-3, "%s", (const char *)"out"); \ 152 } while (0) 153 154 155 WINDOW * 156 openifstat(void) 157 { 158 return (subwin(stdscr, LINES-1-5, 0, 5, 0)); 159 } 160 161 void 162 closeifstat(WINDOW *w) 163 { 164 struct if_stat *node = NULL; 165 166 while (!SLIST_EMPTY(&curlist)) { 167 node = SLIST_FIRST(&curlist); 168 SLIST_REMOVE_HEAD(&curlist, link); 169 free(node); 170 } 171 172 if (w != NULL) { 173 wclear(w); 174 wrefresh(w); 175 delwin(w); 176 } 177 178 return; 179 } 180 181 182 void 183 labelifstat(void) 184 { 185 186 wmove(wnd, TOPLINE, 0); 187 wclrtoeol(wnd); 188 mvprintw(TOPLINE, 0, "%s", TOPLABEL); 189 190 return; 191 } 192 193 void 194 showifstat(void) 195 { 196 struct if_stat *ifp = NULL; 197 SLIST_FOREACH(ifp, &curlist, link) { 198 if (ifp->display == 0) 199 continue; 200 PUTNAME(ifp); 201 PUTRATE(col2, ifp->if_ypos); 202 PUTRATE(col3, ifp->if_ypos); 203 PUTTOTAL(col4, ifp->if_ypos); 204 } 205 206 return; 207 } 208 209 int 210 initifstat(void) 211 { 212 struct if_stat *p = NULL; 213 u_int n = 0, i = 0; 214 215 n = getifnum(); 216 if (n <= 0) 217 return -1; 218 219 SLIST_INIT(&curlist); 220 221 for (i = 0; i < n; i++) { 222 p = (struct if_stat *)malloc(sizeof(struct if_stat)); 223 if (p == NULL) 224 IFSTAT_ERR(1, "out of memory"); 225 memset((void *)p, 0, sizeof(struct if_stat)); 226 SLIST_INSERT_HEAD(&curlist, p, link); 227 p->if_row = i+1; 228 getifmibdata(p->if_row, &p->if_mib); 229 right_align_string(p); 230 231 /* 232 * Initially, we only display interfaces that have 233 * received some traffic. 234 */ 235 if (p->if_mib.ifmd_data.ifi_ibytes != 0) 236 p->display = 1; 237 } 238 239 sort_interface_list(); 240 241 return 1; 242 } 243 244 void 245 fetchifstat(void) 246 { 247 struct if_stat *ifp = NULL; 248 struct timeval tv, new_tv, old_tv; 249 double elapsed = 0.0; 250 u_int new_inb, new_outb, old_inb, old_outb = 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 if (gettimeofday(&new_tv, (struct timezone *)0) != 0) 263 IFSTAT_ERR(2, "error getting time of day"); 264 (void)getifmibdata(ifp->if_row, &ifp->if_mib); 265 266 267 new_inb = ifp->if_mib.ifmd_data.ifi_ibytes; 268 new_outb = ifp->if_mib.ifmd_data.ifi_obytes; 269 270 /* Display interface if it's received some traffic. */ 271 if (new_inb > 0 && old_inb == 0) { 272 ifp->display = 1; 273 we_need_to_sort_interface_list++; 274 } 275 276 /* 277 * The rest is pretty trivial. Calculate the new values 278 * for our current traffic rates, and while we're there, 279 * see if we have new peak rates. 280 */ 281 old_tv = ifp->tv; 282 timersub(&new_tv, &old_tv, &tv); 283 elapsed = tv.tv_sec + (tv.tv_usec * 1e-6); 284 285 ifp->if_in_curtraffic = new_inb - old_inb; 286 ifp->if_out_curtraffic = new_outb - old_outb; 287 288 /* 289 * Rather than divide by the time specified on the comm- 290 * and line, we divide by ``elapsed'' as this is likely 291 * to be more accurate. 292 */ 293 ifp->if_in_curtraffic /= elapsed; 294 ifp->if_out_curtraffic /= elapsed; 295 296 if (ifp->if_in_curtraffic > ifp->if_in_traffic_peak) 297 ifp->if_in_traffic_peak = ifp->if_in_curtraffic; 298 299 if (ifp->if_out_curtraffic > ifp->if_out_traffic_peak) 300 ifp->if_out_traffic_peak = ifp->if_out_curtraffic; 301 302 ifp->tv.tv_sec = new_tv.tv_sec; 303 ifp->tv.tv_usec = new_tv.tv_usec; 304 305 } 306 307 if (we_need_to_sort_interface_list) 308 sort_interface_list(); 309 310 return; 311 } 312 313 /* 314 * We want to right justify our interface names against the first column 315 * (first sixteen or so characters), so we need to do some alignment. 316 */ 317 static void 318 right_align_string(const struct if_stat *ifp) 319 { 320 int str_len = 0, pad_len = 0; 321 char *newstr = NULL, *ptr = NULL; 322 323 if (ifp == NULL || ifp->if_mib.ifmd_name == NULL) 324 return; 325 else { 326 /* string length + '\0' */ 327 str_len = strlen(ifp->if_mib.ifmd_name)+1; 328 pad_len = IF_NAMESIZE-(str_len); 329 330 newstr = __DECONST(char *, ifp->if_name); 331 ptr = newstr + pad_len; 332 (void)memset((void *)newstr, (int)' ', IF_NAMESIZE); 333 (void)strncpy(ptr, (const char *)&ifp->if_mib.ifmd_name, 334 str_len); 335 } 336 337 return; 338 } 339 340 /* 341 * This function iterates through our list of interfaces, identifying 342 * those that are to be displayed (ifp->display = 1). For each interf- 343 * rface that we're displaying, we generate an appropriate position for 344 * it on the screen (ifp->if_ypos). 345 * 346 * This function is called any time a change is made to an interface's 347 * ``display'' state. 348 */ 349 void 350 sort_interface_list(void) 351 { 352 struct if_stat *ifp = NULL; 353 u_int y = 0; 354 355 y = STARTING_ROW; 356 SLIST_FOREACH(ifp, &curlist, link) { 357 if (ifp->display) { 358 ifp->if_ypos = y; 359 y += ROW_SPACING; 360 } 361 } 362 } 363 364 static 365 unsigned int 366 getifnum(void) 367 { 368 u_int data = 0; 369 size_t datalen = 0; 370 static int name[] = { CTL_NET, 371 PF_LINK, 372 NETLINK_GENERIC, 373 IFMIB_SYSTEM, 374 IFMIB_IFCOUNT }; 375 376 datalen = sizeof(data); 377 if (sysctl(name, 5, (void *)&data, (size_t *)&datalen, NULL, 378 (size_t)0) != 0) 379 IFSTAT_ERR(1, "sysctl error"); 380 return data; 381 } 382 383 static void 384 getifmibdata(int row, struct ifmibdata *data) 385 { 386 size_t datalen = 0; 387 static int name[] = { CTL_NET, 388 PF_LINK, 389 NETLINK_GENERIC, 390 IFMIB_IFDATA, 391 0, 392 IFDATA_GENERAL }; 393 datalen = sizeof(*data); 394 name[4] = row; 395 396 if ((sysctl(name, 6, (void *)data, (size_t *)&datalen, NULL, 397 (size_t)0) != 0) && (errno != ENOENT)) 398 IFSTAT_ERR(2, "sysctl error getting interface data"); 399 } 400 401 int 402 cmdifstat(const char *cmd, char *args) 403 { 404 int retval = 0; 405 406 retval = ifcmd(cmd, args); 407 /* ifcmd() returns 1 on success */ 408 if (retval == 1) { 409 showifstat(); 410 refresh(); 411 } 412 413 return retval; 414 } 415