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 1.7 2008/01/12 00:11:26 delphij Exp $ 29 */ 30 31 #include <sys/types.h> 32 #include <sys/socket.h> 33 #include <sys/sysctl.h> 34 #include <net/if.h> 35 #include <net/if_mib.h> 36 37 #include <stdlib.h> 38 #include <string.h> 39 #include <err.h> 40 #include <errno.h> 41 42 #include "systat.h" 43 #include "extern.h" 44 #include "convtbl.h" 45 46 /* Column numbers */ 47 48 #define C1 0 /* 0-19 */ 49 #define C2 20 /* 20-39 */ 50 #define C3 40 /* 40-59 */ 51 #define C4 60 /* 60-80 */ 52 #define C5 80 /* Used for label positioning. */ 53 54 static const int col0 = 0; 55 static const int col1 = C1; 56 static const int col2 = C2; 57 static const int col3 = C3; 58 static const int col4 = C4; 59 static const int col5 = C5; 60 61 62 SLIST_HEAD(, if_stat) curlist; 63 SLIST_HEAD(, if_stat_disp) displist; 64 65 struct if_stat { 66 SLIST_ENTRY(if_stat) link; 67 char if_name[IF_NAMESIZE]; 68 struct ifmibdata if_mib; 69 struct timeval tv; 70 struct timeval tv_lastchanged; 71 u_long if_in_curtraffic; 72 u_long if_out_curtraffic; 73 u_long if_in_traffic_peak; 74 u_long if_out_traffic_peak; 75 u_int if_row; /* Index into ifmib sysctl */ 76 u_int if_ypos; /* 0 if not being displayed */ 77 u_int display; 78 }; 79 80 extern u_int curscale; 81 82 static void right_align_string(struct if_stat *); 83 static void getifmibdata(const int, struct ifmibdata *); 84 static void sort_interface_list(void); 85 static u_int getifnum(void); 86 87 #define IFSTAT_ERR(n, s) do { \ 88 putchar(' '); \ 89 closeifstat(wnd); \ 90 err((n), (s)); \ 91 } while (0) 92 93 #define STARTING_ROW (8) 94 #define ROW_SPACING (3) 95 96 #define TOPLINE 5 97 #define TOPLABEL \ 98 " Interface Traffic Peak Total" 99 100 #define CLEAR_LINE(y, x) do { \ 101 wmove(wnd, y, x); \ 102 wclrtoeol(wnd); \ 103 } while (0) 104 105 #define IN_col2 (ifp->if_in_curtraffic) 106 #define OUT_col2 (ifp->if_out_curtraffic) 107 #define IN_col3 (ifp->if_in_traffic_peak) 108 #define OUT_col3 (ifp->if_out_traffic_peak) 109 #define IN_col4 (ifp->if_mib.ifmd_data.ifi_ibytes) 110 #define OUT_col4 (ifp->if_mib.ifmd_data.ifi_obytes) 111 112 #define EMPTY_COLUMN " " 113 #define CLEAR_COLUMN(y, x) mvprintw((y), (x), "%20s", EMPTY_COLUMN); 114 115 #define DOPUTRATE(c, r, d) do { \ 116 CLEAR_COLUMN(r, c); \ 117 mvprintw(r, (c), "%10.3f %s%s ", \ 118 convert(d##_##c, curscale), \ 119 get_string(d##_##c, curscale), \ 120 "/s"); \ 121 } while (0) 122 123 #define DOPUTTOTAL(c, r, d) do { \ 124 CLEAR_COLUMN((r), (c)); \ 125 mvprintw((r), (c), "%12.3f %s ", \ 126 convert(d##_##c, SC_AUTOBYTE), \ 127 get_string(d##_##c, SC_AUTOBYTE)); \ 128 } while (0) 129 130 #define PUTRATE(c, r) do { \ 131 DOPUTRATE(c, (r), IN); \ 132 DOPUTRATE(c, (r)+1, OUT); \ 133 } while (0) 134 135 #define PUTTOTAL(c, r) do { \ 136 DOPUTTOTAL(c, (r), IN); \ 137 DOPUTTOTAL(c, (r)+1, OUT); \ 138 } while (0) 139 140 #define PUTNAME(p) do { \ 141 mvprintw(p->if_ypos, 0, "%s", p->if_name); \ 142 mvprintw(p->if_ypos, col2-3, "%s", (const char *)"in"); \ 143 mvprintw(p->if_ypos+1, col2-3, "%s", (const char *)"out"); \ 144 } while (0) 145 146 147 WINDOW * 148 openifstat(void) 149 { 150 return (subwin(stdscr, LINES-1-5, 0, 5, 0)); 151 } 152 153 void 154 closeifstat(WINDOW *w) 155 { 156 struct if_stat *node = NULL; 157 158 while (!SLIST_EMPTY(&curlist)) { 159 node = SLIST_FIRST(&curlist); 160 SLIST_REMOVE_HEAD(&curlist, link); 161 free(node); 162 } 163 164 if (w != NULL) { 165 wclear(w); 166 wrefresh(w); 167 delwin(w); 168 } 169 170 return; 171 } 172 173 174 void 175 labelifstat(void) 176 { 177 178 wmove(wnd, TOPLINE, 0); 179 wclrtoeol(wnd); 180 mvprintw(TOPLINE, 0, "%s", TOPLABEL); 181 182 return; 183 } 184 185 void 186 showifstat(void) 187 { 188 struct if_stat *ifp = NULL; 189 SLIST_FOREACH(ifp, &curlist, link) { 190 if (ifp->display == 0) 191 continue; 192 PUTNAME(ifp); 193 PUTRATE(col2, ifp->if_ypos); 194 PUTRATE(col3, ifp->if_ypos); 195 PUTTOTAL(col4, ifp->if_ypos); 196 } 197 198 return; 199 } 200 201 int 202 initifstat(void) 203 { 204 struct if_stat *p = NULL; 205 u_int n = 0, i = 0; 206 207 n = getifnum(); 208 if (n <= 0) 209 return -1; 210 211 SLIST_INIT(&curlist); 212 213 for (i = 0; i < n; i++) { 214 p = (struct if_stat *)calloc(1, sizeof(struct if_stat)); 215 if (p == NULL) 216 IFSTAT_ERR(1, "out of memory"); 217 SLIST_INSERT_HEAD(&curlist, p, link); 218 p->if_row = i+1; 219 getifmibdata(p->if_row, &p->if_mib); 220 right_align_string(p); 221 222 /* 223 * Initially, we only display interfaces that have 224 * received some traffic. 225 */ 226 if (p->if_mib.ifmd_data.ifi_ibytes != 0) 227 p->display = 1; 228 } 229 230 sort_interface_list(); 231 232 return 1; 233 } 234 235 void 236 fetchifstat(void) 237 { 238 struct if_stat *ifp = NULL; 239 struct timeval tv, new_tv, old_tv; 240 double elapsed = 0.0; 241 u_int new_inb, new_outb, old_inb, old_outb = 0; 242 u_int we_need_to_sort_interface_list = 0; 243 244 SLIST_FOREACH(ifp, &curlist, link) { 245 /* 246 * Grab a copy of the old input/output values before we 247 * call getifmibdata(). 248 */ 249 old_inb = ifp->if_mib.ifmd_data.ifi_ibytes; 250 old_outb = ifp->if_mib.ifmd_data.ifi_obytes; 251 ifp->tv_lastchanged = ifp->if_mib.ifmd_data.ifi_lastchange; 252 253 if (gettimeofday(&new_tv, NULL) != 0) 254 IFSTAT_ERR(2, "error getting time of day"); 255 (void)getifmibdata(ifp->if_row, &ifp->if_mib); 256 257 258 new_inb = ifp->if_mib.ifmd_data.ifi_ibytes; 259 new_outb = ifp->if_mib.ifmd_data.ifi_obytes; 260 261 /* Display interface if it's received some traffic. */ 262 if (new_inb > 0 && old_inb == 0) { 263 ifp->display = 1; 264 we_need_to_sort_interface_list++; 265 } 266 267 /* 268 * The rest is pretty trivial. Calculate the new values 269 * for our current traffic rates, and while we're there, 270 * see if we have new peak rates. 271 */ 272 old_tv = ifp->tv; 273 timersub(&new_tv, &old_tv, &tv); 274 elapsed = tv.tv_sec + (tv.tv_usec * 1e-6); 275 276 ifp->if_in_curtraffic = new_inb - old_inb; 277 ifp->if_out_curtraffic = new_outb - old_outb; 278 279 /* 280 * Rather than divide by the time specified on the comm- 281 * and line, we divide by ``elapsed'' as this is likely 282 * to be more accurate. 283 */ 284 ifp->if_in_curtraffic /= elapsed; 285 ifp->if_out_curtraffic /= elapsed; 286 287 if (ifp->if_in_curtraffic > ifp->if_in_traffic_peak) 288 ifp->if_in_traffic_peak = ifp->if_in_curtraffic; 289 290 if (ifp->if_out_curtraffic > ifp->if_out_traffic_peak) 291 ifp->if_out_traffic_peak = ifp->if_out_curtraffic; 292 293 ifp->tv.tv_sec = new_tv.tv_sec; 294 ifp->tv.tv_usec = new_tv.tv_usec; 295 296 } 297 298 if (we_need_to_sort_interface_list) 299 sort_interface_list(); 300 301 return; 302 } 303 304 /* 305 * We want to right justify our interface names against the first column 306 * (first sixteen or so characters), so we need to do some alignment. 307 */ 308 static void 309 right_align_string(struct if_stat *ifp) 310 { 311 int str_len = 0, pad_len = 0; 312 char *newstr = NULL, *ptr = NULL; 313 314 if (ifp == NULL || ifp->if_mib.ifmd_name == NULL) 315 return; 316 else { 317 /* string length + '\0' */ 318 str_len = strlen(ifp->if_mib.ifmd_name)+1; 319 pad_len = IF_NAMESIZE-(str_len); 320 321 newstr = ifp->if_name; 322 ptr = newstr + pad_len; 323 (void)memset((void *)newstr, (int)' ', IF_NAMESIZE); 324 (void)strncpy(ptr, (const char *)&ifp->if_mib.ifmd_name, 325 str_len); 326 } 327 328 return; 329 } 330 331 /* 332 * This function iterates through our list of interfaces, identifying 333 * those that are to be displayed (ifp->display = 1). For each interf- 334 * rface that we're displaying, we generate an appropriate position for 335 * it on the screen (ifp->if_ypos). 336 * 337 * This function is called any time a change is made to an interface's 338 * ``display'' state. 339 */ 340 void 341 sort_interface_list(void) 342 { 343 struct if_stat *ifp = NULL; 344 u_int y = 0; 345 346 y = STARTING_ROW; 347 SLIST_FOREACH(ifp, &curlist, link) { 348 if (ifp->display) { 349 ifp->if_ypos = y; 350 y += ROW_SPACING; 351 } 352 } 353 } 354 355 static 356 unsigned int 357 getifnum(void) 358 { 359 u_int data = 0; 360 size_t datalen = 0; 361 static int name[] = { CTL_NET, 362 PF_LINK, 363 NETLINK_GENERIC, 364 IFMIB_SYSTEM, 365 IFMIB_IFCOUNT }; 366 367 datalen = sizeof(data); 368 if (sysctl(name, 5, (void *)&data, (size_t *)&datalen, NULL, 369 (size_t)0) != 0) 370 IFSTAT_ERR(1, "sysctl error"); 371 return data; 372 } 373 374 static void 375 getifmibdata(int row, struct ifmibdata *data) 376 { 377 size_t datalen = 0; 378 static int name[] = { CTL_NET, 379 PF_LINK, 380 NETLINK_GENERIC, 381 IFMIB_IFDATA, 382 0, 383 IFDATA_GENERAL }; 384 datalen = sizeof(*data); 385 name[4] = row; 386 387 if ((sysctl(name, 6, (void *)data, (size_t *)&datalen, NULL, 388 (size_t)0) != 0) && (errno != ENOENT)) 389 IFSTAT_ERR(2, "sysctl error getting interface data"); 390 } 391 392 int 393 cmdifstat(const char *cmd, char *args) 394 { 395 int retval = 0; 396 397 retval = ifcmd(cmd, args); 398 /* ifcmd() returns 1 on success */ 399 if (retval == 1) { 400 showifstat(); 401 refresh(); 402 } 403 404 return retval; 405 } 406