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 <unistd.h> 40 #include <err.h> 41 #include <errno.h> 42 43 #include "systat.h" 44 #include "extern.h" 45 #include "convtbl.h" 46 47 /* Column numbers */ 48 49 #define C1 0 /* 0-19 */ 50 #define C2 20 /* 20-39 */ 51 #define C3 40 /* 40-59 */ 52 #define C4 60 /* 60-80 */ 53 #define C5 80 /* Used for label positioning. */ 54 55 static const int col0 = 0; 56 static const int col1 = C1; 57 static const int col2 = C2; 58 static const int col3 = C3; 59 static const int col4 = C4; 60 static const int col5 = C5; 61 62 63 static SLIST_HEAD(, if_stat) curlist; 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 struct if_stat *p = NULL; 151 u_int n = 0, i = 0; 152 153 n = getifnum(); /* NOTE: can return < 0 */ 154 155 SLIST_INIT(&curlist); 156 for (i = 0; i < n; i++) { 157 p = (struct if_stat *)calloc(1, sizeof(struct if_stat)); 158 if (p == NULL) 159 IFSTAT_ERR(1, "out of memory"); 160 SLIST_INSERT_HEAD(&curlist, p, link); 161 p->if_row = i+1; 162 getifmibdata(p->if_row, &p->if_mib); 163 right_align_string(p); 164 165 /* 166 * Initially, we only display interfaces that have 167 * received some traffic. 168 */ 169 if (p->if_mib.ifmd_data.ifi_ibytes != 0) 170 p->display = 1; 171 } 172 173 sort_interface_list(); 174 175 return (subwin(stdscr, LINES-1-5, 0, 5, 0)); 176 } 177 178 void 179 closeifstat(WINDOW *w) 180 { 181 struct if_stat *node = NULL; 182 183 while (!SLIST_EMPTY(&curlist)) { 184 node = SLIST_FIRST(&curlist); 185 SLIST_REMOVE_HEAD(&curlist, link); 186 free(node); 187 } 188 189 if (w != NULL) { 190 wclear(w); 191 wrefresh(w); 192 delwin(w); 193 } 194 195 return; 196 } 197 198 199 void 200 labelifstat(void) 201 { 202 203 wmove(wnd, TOPLINE, 0); 204 wclrtoeol(wnd); 205 mvprintw(TOPLINE, 0, "%s", TOPLABEL); 206 207 return; 208 } 209 210 void 211 showifstat(void) 212 { 213 struct if_stat *ifp = NULL; 214 SLIST_FOREACH(ifp, &curlist, link) { 215 if (ifp->display == 0) 216 continue; 217 PUTNAME(ifp); 218 PUTRATE(col2, ifp->if_ypos); 219 PUTRATE(col3, ifp->if_ypos); 220 PUTTOTAL(col4, ifp->if_ypos); 221 } 222 223 return; 224 } 225 226 int 227 initifstat(void) 228 { 229 return 1; 230 } 231 232 void 233 fetchifstat(void) 234 { 235 struct if_stat *ifp = NULL; 236 struct timeval tv, new_tv, old_tv; 237 double elapsed = 0.0; 238 u_int new_inb, new_outb, old_inb, old_outb = 0; 239 u_int we_need_to_sort_interface_list = 0; 240 241 SLIST_FOREACH(ifp, &curlist, link) { 242 /* 243 * Grab a copy of the old input/output values before we 244 * call getifmibdata(). 245 */ 246 old_inb = ifp->if_mib.ifmd_data.ifi_ibytes; 247 old_outb = ifp->if_mib.ifmd_data.ifi_obytes; 248 ifp->tv_lastchanged = ifp->if_mib.ifmd_data.ifi_lastchange; 249 250 if (gettimeofday(&new_tv, NULL) != 0) 251 IFSTAT_ERR(2, "error getting time of day"); 252 (void)getifmibdata(ifp->if_row, &ifp->if_mib); 253 254 255 new_inb = ifp->if_mib.ifmd_data.ifi_ibytes; 256 new_outb = ifp->if_mib.ifmd_data.ifi_obytes; 257 258 /* Display interface if it's received some traffic. */ 259 if (new_inb > 0 && old_inb == 0) { 260 ifp->display = 1; 261 we_need_to_sort_interface_list++; 262 } 263 264 /* 265 * The rest is pretty trivial. Calculate the new values 266 * for our current traffic rates, and while we're there, 267 * see if we have new peak rates. 268 */ 269 old_tv = ifp->tv; 270 timersub(&new_tv, &old_tv, &tv); 271 elapsed = tv.tv_sec + (tv.tv_usec * 1e-6); 272 273 ifp->if_in_curtraffic = new_inb - old_inb; 274 ifp->if_out_curtraffic = new_outb - old_outb; 275 276 /* 277 * Rather than divide by the time specified on the comm- 278 * and line, we divide by ``elapsed'' as this is likely 279 * to be more accurate. 280 */ 281 ifp->if_in_curtraffic /= elapsed; 282 ifp->if_out_curtraffic /= elapsed; 283 284 if (ifp->if_in_curtraffic > ifp->if_in_traffic_peak) 285 ifp->if_in_traffic_peak = ifp->if_in_curtraffic; 286 287 if (ifp->if_out_curtraffic > ifp->if_out_traffic_peak) 288 ifp->if_out_traffic_peak = ifp->if_out_curtraffic; 289 290 ifp->tv.tv_sec = new_tv.tv_sec; 291 ifp->tv.tv_usec = new_tv.tv_usec; 292 293 } 294 295 if (we_need_to_sort_interface_list) 296 sort_interface_list(); 297 298 return; 299 } 300 301 /* 302 * We want to right justify our interface names against the first column 303 * (first sixteen or so characters), so we need to do some alignment. 304 */ 305 static void 306 right_align_string(struct if_stat *ifp) 307 { 308 int str_len = 0, pad_len = 0; 309 char *newstr = NULL, *ptr = NULL; 310 311 if (ifp == NULL || ifp->if_mib.ifmd_name == NULL) 312 return; 313 else { 314 /* string length + '\0' */ 315 str_len = strlen(ifp->if_mib.ifmd_name)+1; 316 pad_len = IF_NAMESIZE-(str_len); 317 318 newstr = ifp->if_name; 319 ptr = newstr + pad_len; 320 (void)memset((void *)newstr, (int)' ', IF_NAMESIZE); 321 (void)strncpy(ptr, (const char *)&ifp->if_mib.ifmd_name, 322 str_len); 323 } 324 325 return; 326 } 327 328 /* 329 * This function iterates through our list of interfaces, identifying 330 * those that are to be displayed (ifp->display = 1). For each interf- 331 * rface that we're displaying, we generate an appropriate position for 332 * it on the screen (ifp->if_ypos). 333 * 334 * This function is called any time a change is made to an interface's 335 * ``display'' state. 336 */ 337 void 338 sort_interface_list(void) 339 { 340 struct if_stat *ifp = NULL; 341 u_int y = 0; 342 343 y = STARTING_ROW; 344 SLIST_FOREACH(ifp, &curlist, link) { 345 if (ifp->display) { 346 ifp->if_ypos = y; 347 y += ROW_SPACING; 348 } 349 } 350 } 351 352 static 353 unsigned int 354 getifnum(void) 355 { 356 u_int data = 0; 357 size_t datalen = 0; 358 static int name[] = { CTL_NET, 359 PF_LINK, 360 NETLINK_GENERIC, 361 IFMIB_SYSTEM, 362 IFMIB_IFCOUNT }; 363 364 datalen = sizeof(data); 365 if (sysctl(name, 5, (void *)&data, (size_t *)&datalen, NULL, 366 (size_t)0) != 0) 367 IFSTAT_ERR(1, "sysctl error"); 368 return data; 369 } 370 371 static void 372 getifmibdata(int row, struct ifmibdata *data) 373 { 374 size_t datalen = 0; 375 static int name[] = { CTL_NET, 376 PF_LINK, 377 NETLINK_GENERIC, 378 IFMIB_IFDATA, 379 0, 380 IFDATA_GENERAL }; 381 datalen = sizeof(*data); 382 name[4] = row; 383 384 if ((sysctl(name, 6, (void *)data, (size_t *)&datalen, NULL, 385 (size_t)0) != 0) && (errno != ENOENT)) 386 IFSTAT_ERR(2, "sysctl error getting interface data"); 387 } 388 389 int 390 cmdifstat(const char *cmd, char *args) 391 { 392 int retval = 0; 393 394 retval = ifcmd(cmd, args); 395 /* ifcmd() returns 1 on success */ 396 if (retval == 1) { 397 showifstat(); 398 refresh(); 399 } 400 401 return retval; 402 } 403