/**
- * nmrp-flash - Netgear Unbrick Utility
+ * nmrpflash - Netgear Unbrick Utility
* Copyright (C) 2016 Joseph Lehner <joseph.c.lehner@gmail.com>
*
- * nmrp-flash is free software: you can redistribute it and/or modify
+ * nmrpflash is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
- * nmrp-flash is distributed in the hope that it will be useful,
+ * nmrpflash is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
- * along with nmrp-flash. If not, see <http://www.gnu.org/licenses/>.
+ * along with nmrpflash. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <ctype.h>
#include "nmrpd.h"
-#define TFTP_PKT_SIZE 516
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
+
+#define TFTP_BLKSIZE 1456
static const char *opcode_names[] = {
- "RRQ", "WRQ", "DATA", "ACK", "ERR"
+ "RRQ", "WRQ", "DATA", "ACK", "ERR", "OACK"
};
enum tftp_opcode {
WRQ = 2,
DATA = 3,
ACK = 4,
- ERR = 5
+ ERR = 5,
+ OACK = 6
};
-static const char *leafname(const char *path)
-{
- const char *slash, *bslash;
-
- slash = strrchr(path, '/');
- bslash = strrchr(path, '\\');
-
- if (slash && bslash) {
- path = 1 + (slash > bslash ? slash : bslash);
- } else if (slash) {
- path = 1 + slash;
- } else if (bslash) {
- path = 1 + bslash;
- }
-
- return path;
-}
-
static bool is_netascii(const char *str)
{
- for (; *str; ++str) {
- if (*str < 0x20 || *str > 0x7f) {
+ uint8_t *p = (uint8_t*)str;
+
+ for (; *p; ++p) {
+ if (*p < 0x20 || *p > 0x7f) {
return false;
}
}
return true;
}
-static inline void pkt_mknum(char *pkt, uint16_t n)
+static inline char *pkt_mknum(char *pkt, uint16_t n)
{
*(uint16_t*)pkt = htons(n);
+ return pkt + 2;
}
static inline uint16_t pkt_num(char *pkt)
return ntohs(*(uint16_t*)pkt);
}
-static void pkt_mkwrq(char *pkt, const char *filename)
+static char *pkt_mkopt(char *pkt, const char *opt, const char* val)
+{
+ strcpy(pkt, opt);
+ pkt += strlen(opt) + 1;
+ strcpy(pkt, val);
+ pkt += strlen(val) + 1;
+ return pkt;
+}
+
+static bool pkt_nextstr(char **pkt, char **str, size_t *rem)
+{
+ size_t len;
+
+ if (!isprint(**pkt) || !(len = strnlen(*pkt, *rem))) {
+ return false;
+ } else if (str) {
+ *str = *pkt;
+ }
+
+ *pkt += len + 1;
+
+ if (*rem > 1) {
+ *rem -= len + 1;
+ } else {
+ *rem = 0;
+ }
+
+ return true;
+}
+
+static bool pkt_nextopt(char **pkt, char **opt, char **val, size_t *rem)
{
- size_t len = 2;
+ return pkt_nextstr(pkt, opt, rem) && pkt_nextstr(pkt, val, rem);
+}
+
+static char *pkt_optval(char* pkt, const char* name)
+{
+ size_t rem = 512;
+ char *opt, *val;
+ pkt += 2;
+
+ while (pkt_nextopt(&pkt, &opt, &val, &rem)) {
+ if (!strcasecmp(name, opt)) {
+ return val;
+ }
+ }
+
+ return NULL;
+}
+static size_t pkt_xrqlen(char *pkt)
+{
+ size_t rem = 512;
+
+ pkt += 2;
+ while (pkt_nextopt(&pkt, NULL, NULL, &rem)) {
+ ;
+ }
+
+ return 514 - rem;
+}
+
+static void pkt_mkwrq(char *pkt, const char *filename, unsigned blksize)
+{
filename = leafname(filename);
- if (!is_netascii(filename) || strlen(filename) > 500) {
- fprintf(stderr, "Overlong/illegal filename; using 'firmware.bin'.");
- filename = "firmware.bin";
+ if (!tftp_is_valid_filename(filename)) {
+ fprintf(stderr, "Overlong/illegal filename; using 'firmware'.\n");
+ filename = "firmware";
+ } else if (!strcmp(filename, "-")) {
+ filename = "firmware";
}
- pkt_mknum(pkt, WRQ);
+ pkt = pkt_mknum(pkt, WRQ);
+ pkt = pkt_mkopt(pkt, filename, "octet");
- strcpy(pkt + len, filename);
- len += strlen(filename) + 1;
- strcpy(pkt + len, "octet");
+ if (blksize && blksize != 512) {
+ pkt = pkt_mkopt(pkt, "blksize", lltostr(blksize, 10));
+ }
}
static inline void pkt_print(char *pkt, FILE *fp)
{
uint16_t opcode = pkt_num(pkt);
- if (!opcode || opcode > ERR) {
+ size_t rem;
+ char *opt, *val;
+
+ if (!opcode || opcode > OACK) {
fprintf(fp, "(%d)", opcode);
} else {
fprintf(fp, "%s", opcode_names[opcode - 1]);
fprintf(fp, "(%d)", pkt_num(pkt + 2));
} else if (opcode == WRQ || opcode == RRQ) {
fprintf(fp, "(%s, %s)", pkt + 2, pkt + 2 + strlen(pkt + 2) + 1);
+ } else if (opcode == OACK) {
+ fprintf(fp, "(");
+ rem = 512;
+ pkt += 2;
+ while (pkt_nextopt(&pkt, &opt, &val, &rem)) {
+ fprintf(fp, " %s=%s ", opt, val);
+ }
+ fprintf(fp, ")");
}
}
}
-static ssize_t tftp_recvfrom(int sock, char *pkt, struct sockaddr_in *src)
+static ssize_t tftp_recvfrom(int sock, char *pkt, uint16_t* port,
+ unsigned timeout, size_t pktlen)
{
ssize_t len;
+ struct sockaddr_in src;
+#ifndef NMRPFLASH_WINDOWS
+ socklen_t alen;
+#else
+ int alen;
+#endif
- len = recvfrom(sock, pkt, TFTP_PKT_SIZE, 0, NULL, NULL);
+ len = select_fd(sock, timeout);
if (len < 0) {
- if (errno != EAGAIN) {
- perror("recvfrom");
- return -1;
- }
+ return -1;
+ } else if (!len) {
+ return 0;
+ }
- return -2;
+ alen = sizeof(src);
+ len = recvfrom(sock, pkt, pktlen, 0, (struct sockaddr*)&src, &alen);
+ if (len < 0) {
+ sock_perror("recvfrom");
+ return -1;
}
+ *port = ntohs(src.sin_port);
+
uint16_t opcode = pkt_num(pkt);
if (opcode == ERR) {
* at offset 0. The limit of 32 chars is arbitrary.
*/
fprintf(stderr, "Error: %.32s\n", pkt);
- return -3;
- } else {
+ return -2;
+ } else if (!opcode || opcode > OACK) {
fprintf(stderr, "Received invalid packet: ");
pkt_print(pkt, stderr);
fprintf(stderr, ".\n");
- return -2;
+ return -1;
+ }
+
+ if (verbosity > 2) {
+ printf(">> ");
+ pkt_print(pkt, stdout);
+ printf("\n");
}
return len;
switch (pkt_num(pkt)) {
case RRQ:
case WRQ:
- len = 2 + strlen(pkt + 2) + 1;
- len += strlen(pkt + len) + 1;
+ case OACK:
+ len = pkt_xrqlen(pkt);
break;
case DATA:
len += 4;
return -1;
}
+ if (verbosity > 2) {
+ printf("<< ");
+ pkt_print(pkt, stdout);
+ printf("\n");
+ }
+
sent = sendto(sock, pkt, len, 0, (struct sockaddr*)dst, sizeof(*dst));
if (sent < 0) {
- perror("sendto");
+ sock_perror("sendto");
}
return sent;
}
-static int sock_set_rx_timeout(int fd, unsigned msec)
+const char *leafname(const char *path)
{
- struct timeval tv;
-
- if (msec) {
- tv.tv_usec = (msec % 1000) * 1000;
- tv.tv_sec = msec / 1000;
- if (setsockopt(fd, SOL_SOCKET, SO_RCVTIMEO, (char*)&tv, sizeof(tv)) < 0) {
- perror("setsockopt(SO_RCVTIMEO)");
- return 1;
- }
+ if (!path) {
+ return NULL;
}
- return 0;
+ const char *slash, *bslash;
+
+ slash = strrchr(path, '/');
+ bslash = strrchr(path, '\\');
+
+ if (slash && bslash) {
+ path = 1 + (slash > bslash ? slash : bslash);
+ } else if (slash) {
+ path = 1 + slash;
+ } else if (bslash) {
+ path = 1 + bslash;
+ }
+
+ return path;
+}
+
+#ifdef NMRPFLASH_WINDOWS
+void sock_perror(const char *msg)
+{
+ win_perror2(msg, WSAGetLastError());
+}
+#endif
+
+inline bool tftp_is_valid_filename(const char *filename)
+{
+ return strlen(filename) <= 255 && is_netascii(filename);
}
+static const char *spinner = "\\|/-";
+
int tftp_put(struct nmrpd_args *args)
{
struct sockaddr_in addr;
- uint16_t block;
- ssize_t len;
- int fd, sock, err, timeout, last_len;
- char rx[TFTP_PKT_SIZE], tx[TFTP_PKT_SIZE];
+ uint16_t block, port, op, blksize;
+ ssize_t len, last_len;
+ int fd, sock, ret, timeouts, errors, ackblock;
+ char rx[2048], tx[2048];
+ const char *file_remote = args->file_remote;
+ char *val, *end;
+ bool rollover;
+ const unsigned rx_timeout = MAX(args->rx_timeout / (args->blind ? 50 : 5), 2000);
+ const unsigned max_timeouts = args->blind ? 3 : 5;
sock = -1;
+ ret = -1;
+ fd = -1;
- fd = open(args->filename, O_RDONLY);
- if (fd < 0) {
- perror("open");
- err = fd;
+ if (g_interrupted) {
goto cleanup;
}
+ if (!strcmp(args->file_local, "-")) {
+ fd = STDIN_FILENO;
+ if (!file_remote) {
+ file_remote = "firmware";
+ }
+ } else {
+ fd = open(args->file_local, O_RDONLY | O_BINARY);
+ if (fd < 0) {
+ xperror("open");
+ ret = fd;
+ goto cleanup;
+ } else if (!file_remote) {
+ file_remote = args->file_local;
+ }
+ }
+
sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if (sock < 0) {
- perror("socket");
- err = sock;
+ sock_perror("socket");
+ ret = sock;
goto cleanup;
}
- err = sock_set_rx_timeout(sock, args->rx_timeout);
- if (err) {
- goto cleanup;
+ memset(&addr, 0, sizeof(addr));
+
+ addr.sin_family = AF_INET;
+
+ if (args->ipaddr_intf) {
+ if ((addr.sin_addr.s_addr = inet_addr(args->ipaddr_intf)) == INADDR_NONE) {
+ xperror("inet_addr");
+ goto cleanup;
+ }
+
+ if (bind(sock, (struct sockaddr*)&addr, sizeof(addr)) != 0) {
+ sock_perror("bind");
+ goto cleanup;
+ }
}
if ((addr.sin_addr.s_addr = inet_addr(args->ipaddr)) == INADDR_NONE) {
- perror("inet_addr");
+ xperror("inet_addr");
goto cleanup;
}
- addr.sin_family = AF_INET;
addr.sin_port = htons(args->port);
+ blksize = 512;
block = 0;
last_len = -1;
len = 0;
+ errors = 0;
+ rollover = false;
/* Not really, but this way the loop sends our WRQ before receiving */
- timeout = 1;
+ timeouts = 1;
+
+ pkt_mkwrq(tx, file_remote, TFTP_BLKSIZE);
+
+ while (!g_interrupted) {
+ ackblock = -1;
+ op = pkt_num(rx);
+
+ if (!timeouts) {
+ if (op == ACK) {
+ ackblock = pkt_num(rx + 2);
+ } else if (op == OACK) {
+ ackblock = 0;
+ if ((val = pkt_optval(rx, "blksize"))) {
+ blksize = strtol(val, &end, 10);
+ if (*end != '\0' || blksize < 8 || blksize > TFTP_BLKSIZE) {
+ fprintf(stderr, "Error: invalid blksize in OACK: %s\n", val);
+ ret = -1;
+ goto cleanup;
+ }
- pkt_mkwrq(tx, args->filename);
+ if (verbosity) {
+ printf("Remote accepted blksize option: %d b\n", blksize);
+ }
+ }
+ }
+ }
+
+ if (timeouts || ackblock == block) {
+ if (!timeouts) {
+ if (++block == 0) {
+ if (!rollover) {
+ printf("Warning: TFTP block rollover. Upload might fail!\n");
+ rollover = true;
+ }
+ }
+
+ printf("%c ", spinner[block & 3]);
+ fflush(stdout);
+ printf("\b\b");
- do {
- if (timeout || (pkt_num(rx) == ACK && pkt_num(rx + 2) == block)) {
- if (!timeout) {
- ++block;
pkt_mknum(tx, DATA);
pkt_mknum(tx + 2, block);
- len = read(fd, tx + 4, 512);
+ len = read(fd, tx + 4, blksize);
if (len < 0) {
- perror("read");
- err = len;
+ xperror("read");
+ ret = len;
goto cleanup;
} else if (!len) {
- if (last_len != 512) {
+ if (last_len != blksize && last_len != -1) {
break;
}
}
last_len = len;
}
- err = tftp_sendto(sock, tx, len, &addr);
- if (err < 0) {
+ ret = tftp_sendto(sock, tx, len, &addr);
+ if (ret < 0) {
+ goto cleanup;
+ }
+ } else if ((op != OACK && op != ACK) || ackblock > block) {
+ if (verbosity) {
+ fprintf(stderr, "Expected ACK(%d), got ", block);
+ pkt_print(rx, stderr);
+ fprintf(stderr, ".\n");
+ }
+
+ if (ackblock != -1 && ++errors > 5) {
+ fprintf(stderr, "Protocol error; bailing out.\n");
+ ret = -1;
goto cleanup;
}
- } else if (pkt_num(rx) != ACK) {
- fprintf(stderr, "Expected ACK(%d), got ", block);
- pkt_print(rx, stderr);
- fprintf(stderr, "!\n");
}
- err = tftp_recvfrom(sock, rx, &addr);
- if (err < 0) {
- if (err == -2) {
- if (++timeout < 5) {
- continue;
- }
+ ret = tftp_recvfrom(sock, rx, &port, rx_timeout, blksize + 4);
+ if (ret < 0) {
+ goto cleanup;
+ } else if (!ret) {
+ if (++timeouts < max_timeouts || (!block && timeouts < (max_timeouts * 4))) {
+ continue;
+ } else if (args->blind) {
+ timeouts = 0;
+ // fake an ACK packet
+ pkt_mknum(rx, ACK);
+ pkt_mknum(rx + 2, block);
+ continue;
+ } else if (block) {
fprintf(stderr, "Timeout while waiting for ACK(%d).\n", block);
+ } else {
+ fprintf(stderr, "Timeout while waiting for ACK(0)/OACK.\n");
}
+ ret = -1;
goto cleanup;
} else {
- timeout = 0;
- err = 0;
+ timeouts = 0;
+ ret = 0;
+
+ if (!block && port != args->port) {
+ if (verbosity > 1) {
+ printf("Switching to port %d\n", port);
+ }
+ addr.sin_port = htons(port);
+ }
}
- } while(1);
+ }
- err = 0;
+ ret = !g_interrupted ? 0 : -1;
cleanup:
if (fd >= 0) {
}
if (sock >= 0) {
- shutdown(sock, SHUT_RDWR);
#ifndef NMRPFLASH_WINDOWS
+ shutdown(sock, SHUT_RDWR);
close(sock);
#else
+ shutdown(sock, SD_BOTH);
closesocket(sock);
#endif
}
- return err;
+ return ret;
}
projects / oweals / nmrpflash.git / blobdiff