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-rw-r--r--util/nvmutil/nvmutil.c106
-rw-r--r--util/nvmutil/nvmutil.h28
2 files changed, 51 insertions, 83 deletions
diff --git a/util/nvmutil/nvmutil.c b/util/nvmutil/nvmutil.c
index 26593137..19b1d977 100644
--- a/util/nvmutil/nvmutil.c
+++ b/util/nvmutil/nvmutil.c
@@ -7,52 +7,25 @@ int
main(int argc, char *argv[])
{
xpledge("stdio rpath wpath unveil", NULL);
- if (argc < 3)
- err(errno = EINVAL, NULL);
- if (strcmp(COMMAND, "dump") == 0)
- flags = O_RDONLY;
+ for (int i = 0; i < 6; i++)
+ if (strcmp(COMMAND, op[i].str) == 0)
+ if (!(cmd = argc >= op[i].args ? op[i].cmd : NULL))
+ break;
+ if (cmd == cmd_setmac)
+ strMac = (argc > 3) ? MAC_ADDRESS : strRMac;
+ else if ((cmd != NULL) && (argc > 3))
+ err_if((errno = (!((part = PARTNUM[0] - '0') == 0 || part == 1))
+ || PARTNUM[1] ? EINVAL : errno));
+ err_if((errno = (!cmd) ? EINVAL : errno));
+
+ nf = ((cmd == cmd_swap) || (cmd == cmd_copy)) ? SIZE_4KB : nf;
+ flags = (strcmp(COMMAND, "dump") == 0) ? O_RDONLY : flags;
openFiles(FILENAME);
-
- void (*cmd)(void) = NULL;
- const char *strMac = NULL, *strRMac = "??:??:??:??:??:??";
-
- if (argc == 3) {
- if (strcmp(COMMAND, "dump") == 0) {
- cmd = &cmd_dump;
- } else if (strcmp(COMMAND, "setmac") == 0) {
- strMac = (char *) strRMac; /* random mac address */
- } else if (strcmp(COMMAND, "swap") == 0) {
- cmd = &cmd_swap;
- nf = SIZE_4KB;
- }
- } else if (argc == 4) {
- if (strcmp(COMMAND, "setmac") == 0) {
- strMac = MAC_ADDRESS; /* user-supplied mac address */
- } else if ((!((part = PARTNUM[0] - '0') == 0 || part == 1))
- || PARTNUM[1]) { /* only allow '1' or '0' */
- errno = EINVAL;
- } else if (strcmp(COMMAND, "setchecksum") == 0) {
- cmd = &cmd_setchecksum;
- } else if (strcmp(COMMAND, "brick") == 0) {
- cmd = &cmd_brick;
- } else if (strcmp(COMMAND, "copy") == 0) {
- cmd = &cmd_copy;
- nf = SIZE_4KB;
- }
- }
- err_if((errno = ((strMac == NULL) && (cmd == NULL)) ? EINVAL : errno));
-
- skipread[part ^ 1] = (cmd == &cmd_copy) | (cmd == &cmd_setchecksum)
- | (cmd == &cmd_brick);
readGbeFile(FILENAME);
- if (strMac != NULL)
- cmd_setmac(strMac); /* nvm gbe.bin setmac */
- else if (cmd != NULL)
- (*cmd)(); /* all other commands except setmac */
+ (*cmd)();
if ((gbeFileModified) && (flags != O_RDONLY))
writeGbeFile(FILENAME);
-
err_if((errno != 0) && (cmd != &cmd_dump));
return errno;
}
@@ -67,17 +40,16 @@ openFiles(const char *path)
xopen(rfd, "/dev/urandom", O_RDONLY);
errno = errno != ENOTDIR ? errno : 0;
xunveil("/dev/urandom", "r");
- if (flags != O_RDONLY) {
+ if (flags != O_RDONLY)
xunveil(path, "w");
- xpledge("stdio wpath", NULL);
- } else
- xpledge("stdio", NULL);
+ xpledge("stdio", NULL);
}
void
readGbeFile(const char *path)
{
- big_endian = ((uint8_t *) &test)[0] ^ 1;
+ skipread[part ^ 1] = (cmd == &cmd_copy) | (cmd == &cmd_setchecksum)
+ | (cmd == &cmd_brick);
gbe[1] = (gbe[0] = (size_t) buf) + SIZE_4KB;
for (int p = 0; p < 2; p++) {
if (skipread[p])
@@ -88,12 +60,10 @@ readGbeFile(const char *path)
}
void
-cmd_setmac(const char *strMac)
+cmd_setmac(void)
{
- uint16_t mac[3] = {0, 0, 0};
if (invalidMacAddress(strMac, mac))
err(errno = ECANCELED, "Bad MAC address");
-
for (int partnum = 0; partnum < 2; partnum++) {
if (validChecksum(part = partnum)) {
for (int w = 0; w < 3; w++)
@@ -106,10 +76,9 @@ cmd_setmac(const char *strMac)
int
invalidMacAddress(const char *strMac, uint16_t *mac)
{
- uint8_t h;
uint64_t total = 0;
if (strnlen(strMac, 20) == 17) {
- for (int i = 0; i < 16; i += 3) {
+ for (uint8_t h, i = 0; i < 16; i += 3) {
if (i != 15)
if (strMac[i + 2] != ':')
return 1;
@@ -136,17 +105,13 @@ hextonum(char ch)
return ch - 'A' + 10;
else if ((ch >= 'a') && (ch <= 'f'))
return ch - 'a' + 10;
- else if (ch == '?')
- return rhex(); /* random number */
- else
- return 16;
+ return (ch == '?') ? rhex() : 16;
}
uint8_t
rhex(void)
{
- static int n = 0;
- static uint8_t rnum[16];
+ static uint8_t n = 0, rnum[16];
if (!n)
xpread(rfd, (uint8_t *) &rnum, (n = 15) + 1, 0, "/dev/urandom");
return rnum[n--] & 0xf;
@@ -155,24 +120,20 @@ rhex(void)
void
cmd_dump(void)
{
- int partnum, numInvalid = 0;
- for (partnum = 0; partnum < 2; partnum++) {
+ for (int partnum = 0, numInvalid = 0; partnum < 2; partnum++) {
if (!validChecksum(partnum))
++numInvalid;
printf("MAC (part %d): ", partnum);
- showmac(partnum);
- hexdump(partnum);
+ showmac(partnum), hexdump(partnum);
+ errno = ((numInvalid < 2) && (partnum)) ? 0 : errno;
}
- if (numInvalid < 2)
- errno = 0;
}
void
showmac(int partnum)
{
- uint16_t val16;
for (int c = 0; c < 3; c++) {
- val16 = word(c, partnum);
+ uint16_t val16 = word(c, partnum);
printf("%02x:%02x", val16 & 0xff, val16 >> 8);
printf(c == 2 ? "\n" : ":");
}
@@ -186,8 +147,7 @@ hexdump(int partnum)
for (int c = 0; c < 8; c++) {
uint16_t val16 = word((row << 3) + c, partnum);
printf(" %02x%02x", val16 >> 8, val16 & 0xff);
- }
- printf("\n");
+ } printf("\n");
}
}
@@ -210,17 +170,15 @@ cmd_brick(void)
void
cmd_swap(void)
{
- gbeFileModified = nvmPartModified[0] = nvmPartModified[1]
- = validChecksum(1) | validChecksum(0);
- if (gbeFileModified)
+ if ((gbeFileModified = nvmPartModified[0] = nvmPartModified[1]
+ = validChecksum(1) | validChecksum(0)))
xorswap(gbe[0], gbe[1]); /* speedhack: swap ptr, not words */
}
void
cmd_copy(void)
{
- gbeFileModified = nvmPartModified[part ^ 1] = validChecksum(part);
- if (gbeFileModified)
+ if ((gbeFileModified = nvmPartModified[part ^ 1] = validChecksum(part)))
gbe[part ^ 1] = gbe[part]; /* speedhack: copy ptr, not words */
}
@@ -254,8 +212,7 @@ xorswap_buf(int partnum)
void
writeGbeFile(const char *filename)
{
- if (gbeFileModified)
- errno = 0;
+ errno = 0;
for (int x = gbe[0] > gbe[1] ? 1 : 0, p = 0; p < 2; p++, x ^= 1) {
if (!nvmPartModified[x])
continue;
@@ -263,5 +220,4 @@ writeGbeFile(const char *filename)
xpwrite(fd, (uint8_t *) gbe[x], nf, x << 12, filename);
}
xclose(fd, filename);
- xpledge("stdio", NULL);
}
diff --git a/util/nvmutil/nvmutil.h b/util/nvmutil/nvmutil.h
index d69977d8..3f084da4 100644
--- a/util/nvmutil/nvmutil.h
+++ b/util/nvmutil/nvmutil.h
@@ -15,7 +15,7 @@
void openFiles(const char *path);
void readGbeFile(const char *path);
-void cmd_setmac(const char *strMac);
+void cmd_setmac(void);
int invalidMacAddress(const char *strMac, uint16_t *mac);
uint8_t hextonum(char chs);
uint8_t rhex(void);
@@ -38,16 +38,28 @@ void writeGbeFile(const char *filename);
#define SIZE_4KB 0x1000
#define SIZE_8KB 0x2000
-uint16_t buf16[SIZE_4KB];
+uint16_t buf16[SIZE_4KB], mac[3] = {0, 0, 0};
uint8_t *buf = (uint8_t *) &buf16;
size_t nf = 128, gbe[2];
-uint8_t skipread[2] = {0, 0};
+uint8_t nvmPartModified[2] = {0, 0}, skipread[2] = {0, 0};
+int endian = 1, flags = O_RDWR, rfd, fd, part, gbeFileModified = 0;
-int flags = O_RDWR, rfd, fd, part, gbeFileModified = 0;
-uint8_t nvmPartModified[2] = {0, 0};
+const char *strMac = NULL, *strRMac = "??:??:??:??:??:??";
-int test = 1;
-int big_endian;
+typedef struct op {
+ char *str;
+ void (*cmd)(void);
+ int args;
+} op_t;
+op_t op[] = {
+{ .str = "dump", .cmd = cmd_dump, .args = 3},
+{ .str = "setmac", .cmd = cmd_setmac, .args = 3},
+{ .str = "swap", .cmd = cmd_swap, .args = 3},
+{ .str = "copy", .cmd = cmd_copy, .args = 4},
+{ .str = "brick", .cmd = cmd_brick, .args = 4},
+{ .str = "setchecksum", .cmd = cmd_setchecksum, .args = 4},
+};
+void (*cmd)(void) = NULL;
#define ERR() errno = errno ? errno : ECANCELED
#define err_if(x) if (x) err(ERR(), NULL)
@@ -56,7 +68,7 @@ int big_endian;
if ((f = open(l, p)) == -1) err(ERR(), "%s", l); \
if (fstat(f, &st) == -1) err(ERR(), "%s", l)
#define xpread(f, b, n, o, l) if (pread(f, b, n, o) == -1) err(ERR(), "%s", l)
-#define handle_endianness(r) if (big_endian) xorswap_buf(r)
+#define handle_endianness(r) if (((uint8_t *) &endian)[0] ^ 1) xorswap_buf(r)
#define xpwrite(f, b, n, o, l) if (pwrite(f, b, n, o) == -1) err(ERR(), "%s", l)
#define xclose(f, l) if (close(f) == -1) err(ERR(), "%s", l)
generated by cgit v1.2.1 (git 2.18.0) at 2024-11-08 09:00:02 +0000