mirror of
https://github.com/ElementsProject/lightning.git
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121 lines
3.0 KiB
C
121 lines
3.0 KiB
C
#include "config.h"
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#include <ccan/err/err.h>
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#include <ccan/opt/opt.h>
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#include <ccan/tal/grab_file/grab_file.h>
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#include <unistd.h>
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#if EXPERIMENTAL_FEATURES
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#include <wire/onion_exp_printgen.h>
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#include <wire/peer_exp_printgen.h>
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#else
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#include <wire/onion_printgen.h>
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#include <wire/peer_printgen.h>
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#endif
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static char *opt_set_tlvname(const char *arg,
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bool (**printwire)(const char *fieldname,
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const u8 **cursor,
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size_t *plen))
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{
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for (size_t i = 0; tlvs_printpeer_wire_byname[i].name; i++) {
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if (streq(arg, tlvs_printpeer_wire_byname[i].name)) {
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*printwire = tlvs_printpeer_wire_byname[i].print;
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return NULL;
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}
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}
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for (size_t i = 0; tlvs_printonion_wire_byname[i].name; i++) {
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if (streq(arg, tlvs_printonion_wire_byname[i].name)) {
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*printwire = tlvs_printonion_wire_byname[i].print;
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return NULL;
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}
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}
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return "Unknown tlv name";
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}
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static char *opt_set_onionprint(bool (**printwire)(const u8 *msg))
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{
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*printwire = printonion_wire_message;
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return NULL;
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}
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static char *opt_list_tlvnames(void *unused)
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{
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for (size_t i = 0; tlvs_printpeer_wire_byname[i].name; i++)
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printf(" %s\n", tlvs_printpeer_wire_byname[i].name);
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for (size_t i = 0; tlvs_printonion_wire_byname[i].name; i++)
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printf(" %s\n", tlvs_printonion_wire_byname[i].name);
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exit(0);
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}
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int main(int argc, char *argv[])
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{
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const u8 *m;
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bool (*printtlv)(const char *fieldname, const u8 **cursor, size_t *plen) = NULL;
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bool (*printwire)(const u8 *msg) = printpeer_wire_message;
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bool ok = true;
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setup_locale();
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opt_register_noarg("--onion", opt_set_onionprint, &printwire,
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"Decode an error message instead of a peer message");
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opt_register_arg("--tlv", opt_set_tlvname, NULL, &printtlv,
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"Decode a TLV of this type instead of a peer message");
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opt_register_noarg("--list-tlvs", opt_list_tlvnames, NULL,
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"List all --tlv names supported");
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opt_register_noarg("--help|-h", opt_usage_and_exit,
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"[<hexmsg>]"
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"Decode a lightning spec wire message from hex, or a series of messages from stdin",
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"Print this message.");
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opt_parse(&argc, argv, opt_log_stderr_exit);
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if (argc > 2)
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opt_usage_and_exit("Too many arguments");
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if (argc == 2) {
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/* Arg is hex string */
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m = tal_hexdata(NULL, argv[1], strlen(argv[1]));
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if (!m)
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errx(1, "'%s' is not valid hex", argv[1]);
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if (printtlv) {
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size_t len = tal_bytelen(m);
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ok &= printtlv("", &m, &len);
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} else {
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ok &= printwire(m);
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}
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} else {
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u8 *f = grab_fd(NULL, STDIN_FILENO);
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size_t off = 0;
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while (off != tal_count(f)) {
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be16 len;
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if (off + sizeof(len) > tal_count(f)) {
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warnx("Truncated file");
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ok = false;
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break;
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}
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memcpy(&len, f + off, sizeof(len));
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off += sizeof(len);
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if (off + be16_to_cpu(len) > tal_count(f)) {
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warnx("Truncated file");
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ok = false;
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break;
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}
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m = tal_dup_arr(f, u8, f + off, be16_to_cpu(len), 0);
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if (printtlv) {
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size_t len = tal_bytelen(m);
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ok &= printtlv("", &m, &len);
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} else {
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ok &= printwire(m);
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}
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off += be16_to_cpu(len);
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tal_free(m);
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}
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}
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printf("\n");
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return ok ? 0 : 1;
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}
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