1 /* 2 * Copyright (C) 2017 Netronome Systems, Inc. 3 * 4 * This software is dual licensed under the GNU General License Version 2, 5 * June 1991 as shown in the file COPYING in the top-level directory of this 6 * source tree or the BSD 2-Clause License provided below. You have the 7 * option to license this software under the complete terms of either license. 8 * 9 * The BSD 2-Clause License: 10 * 11 * Redistribution and use in source and binary forms, with or 12 * without modification, are permitted provided that the following 13 * conditions are met: 14 * 15 * 1. Redistributions of source code must retain the above 16 * copyright notice, this list of conditions and the following 17 * disclaimer. 18 * 19 * 2. Redistributions in binary form must reproduce the above 20 * copyright notice, this list of conditions and the following 21 * disclaimer in the documentation and/or other materials 22 * provided with the distribution. 23 * 24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 31 * SOFTWARE. 32 */ 33 34 /* Author: Jakub Kicinski <kubakici@wp.pl> */ 35 36 #include <bfd.h> 37 #include <ctype.h> 38 #include <errno.h> 39 #include <linux/bpf.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <string.h> 43 44 #include <bpf.h> 45 46 #include "main.h" 47 48 const char *bin_name; 49 static int last_argc; 50 static char **last_argv; 51 static int (*last_do_help)(int argc, char **argv); 52 53 void usage(void) 54 { 55 last_do_help(last_argc - 1, last_argv + 1); 56 57 exit(-1); 58 } 59 60 static int do_help(int argc, char **argv) 61 { 62 fprintf(stderr, 63 "Usage: %s OBJECT { COMMAND | help }\n" 64 " %s batch file FILE\n" 65 "\n" 66 " OBJECT := { prog | map }\n", 67 bin_name, bin_name); 68 69 return 0; 70 } 71 72 int cmd_select(const struct cmd *cmds, int argc, char **argv, 73 int (*help)(int argc, char **argv)) 74 { 75 unsigned int i; 76 77 last_argc = argc; 78 last_argv = argv; 79 last_do_help = help; 80 81 if (argc < 1 && cmds[0].func) 82 return cmds[0].func(argc, argv); 83 84 for (i = 0; cmds[i].func; i++) 85 if (is_prefix(*argv, cmds[i].cmd)) 86 return cmds[i].func(argc - 1, argv + 1); 87 88 help(argc - 1, argv + 1); 89 90 return -1; 91 } 92 93 bool is_prefix(const char *pfx, const char *str) 94 { 95 if (!pfx) 96 return false; 97 if (strlen(str) < strlen(pfx)) 98 return false; 99 100 return !memcmp(str, pfx, strlen(pfx)); 101 } 102 103 void print_hex(void *arg, unsigned int n, const char *sep) 104 { 105 unsigned char *data = arg; 106 unsigned int i; 107 108 for (i = 0; i < n; i++) { 109 const char *pfx = ""; 110 111 if (!i) 112 /* nothing */; 113 else if (!(i % 16)) 114 printf("\n"); 115 else if (!(i % 8)) 116 printf(" "); 117 else 118 pfx = sep; 119 120 printf("%s%02hhx", i ? pfx : "", data[i]); 121 } 122 } 123 124 static int do_batch(int argc, char **argv); 125 126 static const struct cmd cmds[] = { 127 { "help", do_help }, 128 { "batch", do_batch }, 129 { "prog", do_prog }, 130 { "map", do_map }, 131 { 0 } 132 }; 133 134 static int do_batch(int argc, char **argv) 135 { 136 unsigned int lines = 0; 137 char *n_argv[4096]; 138 char buf[65536]; 139 int n_argc; 140 FILE *fp; 141 int err; 142 143 if (argc < 2) { 144 err("too few parameters for batch\n"); 145 return -1; 146 } else if (!is_prefix(*argv, "file")) { 147 err("expected 'file', got: %s\n", *argv); 148 return -1; 149 } else if (argc > 2) { 150 err("too many parameters for batch\n"); 151 return -1; 152 } 153 NEXT_ARG(); 154 155 fp = fopen(*argv, "r"); 156 if (!fp) { 157 err("Can't open file (%s): %s\n", *argv, strerror(errno)); 158 return -1; 159 } 160 161 while (fgets(buf, sizeof(buf), fp)) { 162 if (strlen(buf) == sizeof(buf) - 1) { 163 errno = E2BIG; 164 break; 165 } 166 167 n_argc = 0; 168 n_argv[n_argc] = strtok(buf, " \t\n"); 169 170 while (n_argv[n_argc]) { 171 n_argc++; 172 if (n_argc == ARRAY_SIZE(n_argv)) { 173 err("line %d has too many arguments, skip\n", 174 lines); 175 n_argc = 0; 176 break; 177 } 178 n_argv[n_argc] = strtok(NULL, " \t\n"); 179 } 180 181 if (!n_argc) 182 continue; 183 184 err = cmd_select(cmds, n_argc, n_argv, do_help); 185 if (err) 186 goto err_close; 187 188 lines++; 189 } 190 191 if (errno && errno != ENOENT) { 192 perror("reading batch file failed"); 193 err = -1; 194 } else { 195 info("processed %d lines\n", lines); 196 err = 0; 197 } 198 err_close: 199 fclose(fp); 200 201 return err; 202 } 203 204 int main(int argc, char **argv) 205 { 206 bin_name = argv[0]; 207 NEXT_ARG(); 208 209 bfd_init(); 210 211 return cmd_select(cmds, argc, argv, do_help); 212 } 213