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-rw-r--r--toys/pending/netstat.c281
1 files changed, 97 insertions, 184 deletions
diff --git a/toys/pending/netstat.c b/toys/pending/netstat.c
index bb72f461..a4096650 100644
--- a/toys/pending/netstat.c
+++ b/toys/pending/netstat.c
@@ -5,7 +5,7 @@
*
* Not in SUSv4.
*
-USE_NETSTAT(NEWTOY(netstat, "pWrxwutneal", TOYFLAG_BIN))
+USE_NETSTAT(NEWTOY(netstat, "pWrxwutneal[-al]", TOYFLAG_BIN))
config NETSTAT
bool "netstat"
default n
@@ -54,13 +54,6 @@ typedef union _iaddr6 {
#define ADDR_LEN (INET6_ADDRSTRLEN + 1 + 5 + 1)//IPv6 addr len + : + port + '\0'
-//For unix states
-enum {
- SOCK_ACCEPTCON = (1 << 16), //performed a listen.
- SOCK_WAIT_DATA = (1 << 17), //wait data to read.
- SOCK_NO_SPACE = (1 << 18), //no space to write.
-};
-
#define SOCK_NOT_CONNECTED 1
typedef struct _pidlist {
@@ -273,8 +266,8 @@ static void show_ipv6(char *fname, char *label)
{
FILE *fp = fopen(fname, "r");
if (!fp) {
- perror_msg("'%s'", fname);
- return;
+ perror_msg("'%s'", fname);
+ return;
}
if(!fgets(toybuf, sizeof(toybuf), fp)) return; //skip header.
@@ -284,6 +277,7 @@ static void show_ipv6(char *fname, char *label)
iaddr6 laddr6, raddr6;
unsigned lport, rport, state, txq, rxq, num, uid;
unsigned long inode;
+
int nitems = sscanf(toybuf, " %d: %8x%8x%8x%8x:%x %8x%8x%8x%8x:%x %x %x:%x "
"%*X:%*X %*X %d %*d %ld",
&num, &laddr6.u.a, &laddr6.u.b, &laddr6.u.c,
@@ -299,72 +293,48 @@ static void show_ipv6(char *fname, char *label)
fclose(fp);
}
-/*
- * display unix socket info.
- */
-static void show_unix_sockets(char *fname, char *label)
+static void show_unix_sockets(void)
{
- FILE *fp = fopen((char *)fname, "r");
- if (!fp) {
- perror_msg("'%s'", fname);
- return;
- }
+ char *types[] = {"","STREAM","DGRAM","RAW","RDM","SEQPACKET","DCCP","PACKET"},
+ *states[] = {"","LISTENING","CONNECTING","CONNECTED","DISCONNECTING"};
+ unsigned long refcount, flags, type, state, inode;
+ FILE *fp = xfopen("/proc/net/unix", "r");
if(!fgets(toybuf, sizeof(toybuf), fp)) return; //skip header.
while (fgets(toybuf, sizeof(toybuf), fp)) {
- unsigned long refcount, label, flags, inode;
- int nitems = 0, path_offset = 0, type, state;
- char sock_flags[32] = {0,}, *sock_type, *sock_state, *bptr = toybuf, *term;
+ unsigned offset = 0;
- if (!toybuf[0]) continue;
+ // count = 6 or 7 (first field ignored, sockets don't always have filenames)
+ if (6<sscanf(toybuf, "%*p: %lX %*X %lX %lX %lX %lu %n",
+ &refcount, &flags, &type, &state, &inode, &offset))
+ continue;
- nitems = sscanf(toybuf, "%*p: %lX %lX %lX %X %X %lu %n",
- &refcount, &label, &flags, &type, &state, &inode, &path_offset);
+ // Linux exports only SO_ACCEPTCON since 2.3.15pre3 in 1999, but let's
+ // filter in case they add more someday.
+ flags &= 1<<16;
- //for state one less
- if (nitems < 6) break;
+ // Only show unconnected listening sockets with -a
+ if (state==1 && flags && !(toys.optflags&FLAG_a)) continue;
- if (toys.optflags & FLAG_l) {
- if ( !((state == SOCK_NOT_CONNECTED) && (flags & SOCK_ACCEPTCON)) )
- continue;
- } else if (!(toys.optflags & FLAG_a)) {
- if ((state == SOCK_NOT_CONNECTED) && (flags & SOCK_ACCEPTCON)) continue;
- }
+ if (type==10) type = 7; // move SOCK_PACKET into line
+ if (type>ARRAY_LEN(types)) type = 0;
+ if (state>ARRAY_LEN(states)) state = 0;
+ sprintf(toybuf, "[ %s]", flags ? "ACC " : "");
- //prepare socket type, state and flags.
- {
- char *ss_type[] = { "", "STREAM", "DGRAM", "RAW", "RDM", "SEQPACKET",
- "UNKNOWN"};
- char *ss_state[] = { "FREE", "LISTENING", "CONNECTING", "CONNECTED",
- "DISCONNECTING", "UNKNOWN"};
-
- int sz = ARRAY_LEN(ss_type);//sizeof(ss_type)/sizeof(ss_type[0]);
- if ( (type < SOCK_STREAM) || (type > SOCK_SEQPACKET) )
- sock_type = ss_type[sz-1];
- else sock_type = ss_type[type];
-
- sz = ARRAY_LEN(ss_state);//sizeof(ss_state)/sizeof(ss_state[0]);
- if ((state < 0) || (state > sz-2)) sock_state = ss_state[sz-1];
- else if (state == SOCK_NOT_CONNECTED) {
- if (flags & SOCK_ACCEPTCON) sock_state = ss_state[state];
- else sock_state = " ";
- } else sock_state = ss_state[state];
-
- strcpy(sock_flags, "[ ");
- if (flags & SOCK_ACCEPTCON) strcat(sock_flags, "ACC ");
- if (flags & SOCK_WAIT_DATA) strcat(sock_flags, "W ");
- if (flags & SOCK_NO_SPACE) strcat(sock_flags, "N ");
- strcat(sock_flags, "]");
+ printf("unix %-6ld %-11s %-10s %-13s %8lu ",
+ refcount, toybuf, types[type], states[state], inode);
+ if (toys.optflags & FLAG_p) printf("%-20s", get_pid_name(inode));
+
+ if (offset) {
+ char *s = toybuf+offset, *ss;
+
+ if ((ss = strrchr(s, '\n'))) *ss = 0;
+ xprintf("%s", s);
}
- xprintf("%-5s %-6ld %-11s %-10s %-13s %8lu ", (!label ? "unix" : "??"),
- refcount, sock_flags, sock_type, sock_state, inode);
- if (toys.optflags & FLAG_p) xprintf("%-20s", get_pid_name(inode));
-
- bptr += path_offset;
- if ((term = strchr(bptr, '\n'))) *term = '\0';
- xprintf("%s\n", bptr);
- }//End of while
+ xputc('\n');
+ }
+
fclose(fp);
}
@@ -472,111 +442,69 @@ static void clean_pid_list(void)
}
/*
- * For TCP/UDP/RAW show the header.
- */
-static void show_header(void)
-{
- xprintf("Proto Recv-Q Send-Q ");
- xprintf((toys.optflags & FLAG_W) ? "%-51s %-51s" : "%-23s %-23s",
- "Local Address", "Foreign Address");
- xprintf(" State ");
- if (toys.optflags & FLAG_e) xprintf(" User Inode ");
- if (toys.optflags & FLAG_p) xprintf(" PID/Program Name");
- xputc('\n');
-}
-
-/*
- * used to get the flag values for route command.
+ * extract inet4 route info from /proc/net/route file and display it.
*/
-static void get_flag_value(char *flagstr, int flags)
+static void display_routes(void)
{
- int i = 0;
- char *str = flagstr;
static const char flagchars[] = "GHRDMDAC";
static const unsigned flagarray[] = {
- RTF_GATEWAY,
- RTF_HOST,
- RTF_REINSTATE,
- RTF_DYNAMIC,
- RTF_MODIFIED,
- RTF_DEFAULT,
- RTF_ADDRCONF,
- RTF_CACHE
+ RTF_GATEWAY, RTF_HOST, RTF_REINSTATE, RTF_DYNAMIC, RTF_MODIFIED
};
- *str++ = 'U';
-
- while ( (*str = flagchars[i]) ) {
- if (flags & flagarray[i++]) ++str;
- }
-}
-
-/*
- * extract inet4 route info from /proc/net/route file and display it.
- */
-static void display_routes(int is_more_info, int notresolve)
-{
-#define IPV4_MASK (RTF_GATEWAY|RTF_HOST|RTF_REINSTATE|RTF_DYNAMIC|RTF_MODIFIED)
unsigned long dest, gate, mask;
int flags, ref, use, metric, mss, win, irtt;
- char iface[64]={0,};
- char flag_val[10]={0,}; //there are 9 flags "UGHRDMDAC" for route.
-
+ char *out = toybuf, *flag_val;
+ char iface[64]={0};
FILE *fp = xfopen("/proc/net/route", "r");
if(!fgets(toybuf, sizeof(toybuf), fp)) return; //skip header.
xprintf("Kernel IP routing table\n"
"Destination Gateway Genmask Flags %s Iface\n",
- is_more_info ? " MSS Window irtt" : "Metric Ref Use");
+ !(toys.optflags&FLAG_e) ? " MSS Window irtt" : "Metric Ref Use");
while (fgets(toybuf, sizeof(toybuf), fp)) {
- int nitems = 0;
- char *destip = NULL, *gateip = NULL, *maskip = NULL;
-
- nitems = sscanf(toybuf, "%63s%lx%lx%X%d%d%d%lx%d%d%d\n", iface, &dest,
- &gate, &flags, &ref, &use, &metric, &mask, &mss, &win, &irtt);
- if (nitems != 11) {//EOF with no (nonspace) chars read.
- if ((nitems < 0) && feof(fp)) break;
- perror_exit("sscanf");
- }
+ char *destip = 0, *gateip = 0, *maskip = 0;
- //skip down interfaces.
+ if (11 != sscanf(toybuf, "%63s%lx%lx%X%d%d%d%lx%d%d%d", iface, &dest,
+ &gate, &flags, &ref, &use, &metric, &mask, &mss, &win, &irtt))
+ break;
+
+ // skip down interfaces.
if (!(flags & RTF_UP)) continue;
- if (dest) {//For Destination
- if (inet_ntop(AF_INET, &dest, toybuf, sizeof(toybuf)) )
- destip = xstrdup(toybuf);
- } else {
- if (!notresolve) destip = xstrdup("default");
- else destip = xstrdup("0.0.0.0");
- }
+// TODO /proc/net/ipv6_route
- if (gate) {//For Gateway
- if (inet_ntop(AF_INET, &gate, toybuf, sizeof(toybuf)) )
- gateip = xstrdup(toybuf);
- } else {
- if (!notresolve) gateip = xstrdup("*");
- else gateip = xstrdup("0.0.0.0");
- }
+ if (dest) {
+ if (inet_ntop(AF_INET, &dest, out, 16)) destip = out;
+ } else destip = (toys.optflags&FLAG_n) ? "0.0.0.0" : "default";
+ out += 16;
+ if (gate) {
+ if (inet_ntop(AF_INET, &gate, out, 16)) gateip = out;
+ } else gateip = (toys.optflags&FLAG_n) ? "0.0.0.0" : "*";
+ out += 16;
+
+// TODO /24
//For Mask
- if (inet_ntop(AF_INET, &mask, toybuf, sizeof(toybuf)) )
- maskip = xstrdup(toybuf);
+ if (inet_ntop(AF_INET, &mask, out, 16)) maskip = out;
+ else maskip = "?";
+ out += 16;
//Get flag Values
- get_flag_value(flag_val, flags & IPV4_MASK);
- if (flags & RTF_REJECT) flag_val[0] = '!';
+ flag_val = out;
+ *out++ = 'U';
+ for (dest = 0; dest < ARRAY_LEN(flagarray); dest++)
+ if (flags&flagarray[dest]) *out++ = flagchars[dest];
+ *out = 0;
+ if (flags & RTF_REJECT) *flag_val = '!';
xprintf("%-15.15s %-15.15s %-16s%-6s", destip, gateip, maskip, flag_val);
- if (is_more_info) xprintf("%5d %-5d %6d %s\n", mss, win, irtt, iface);
+ if (!(toys.optflags & FLAG_e))
+ xprintf("%5d %-5d %6d %s\n", mss, win, irtt, iface);
else xprintf("%-6d %-2d %7d %s\n", metric, ref, use, iface);
+ }
- if (destip) free(destip);
- if (gateip) free(gateip);
- if (maskip) free(maskip);
- }//end of while.
fclose(fp);
-#undef IPV4_MASK
}
/*
@@ -584,30 +512,20 @@ static void display_routes(int is_more_info, int notresolve)
*/
void netstat_main(void)
{
-#define IS_NETSTAT_PROTO_FLAGS_UP (toys.optflags & (FLAG_t | FLAG_u | FLAG_w \
- | FLAG_x))
-
- // For no parameter, add 't', 'u', 'w', 'x' options as default
- if (!toys.optflags) toys.optflags = FLAG_t | FLAG_u | FLAG_w | FLAG_x;
+ char *type = "w/o";
- // For both 'a' and 'l' are set, remove 'l' option
- if (toys.optflags & FLAG_a && toys.optflags & FLAG_l)
- toys.optflags &= ~FLAG_l;
-
- // For each 'a', 'l', 'e', 'n', 'W', 'p' options
- // without any 't', 'u', 'w', 'x' option, add 't', 'u', 'w', 'x' options
- if (((toys.optflags & FLAG_a) || (toys.optflags & FLAG_l) ||
- (toys.optflags & FLAG_e) || (toys.optflags & FLAG_n) ||
- (toys.optflags & FLAG_W) || (toys.optflags & FLAG_p)) &&
- (!IS_NETSTAT_PROTO_FLAGS_UP) )
- toys.optflags |= FLAG_t | FLAG_u | FLAG_w | FLAG_x;
-
- //Display routing table.
if (toys.optflags & FLAG_r) {
- display_routes(!(toys.optflags & FLAG_e), (toys.optflags & FLAG_n));
+ display_routes();
+
return;
}
+ if (!(toys.optflags&(FLAG_t|FLAG_u|FLAG_w|FLAG_x)))
+ toys.optflags |= FLAG_t|FLAG_u|FLAG_w|FLAG_x;
+
+ if (toys.optflags & FLAG_a) type = "established and";
+ else if (toys.optflags & FLAG_l) type = "only";
+
if (toys.optflags & FLAG_p) {
dirtree_read("/proc", scan_pids);
// TODO: we probably shouldn't warn if all the processes we're going to
@@ -618,16 +536,17 @@ void netstat_main(void)
" will not be shown, you would have to be root to see it all.)\n");
}
- //For TCP/UDP/RAW.
- if ( (toys.optflags & FLAG_t) || (toys.optflags & FLAG_u) ||
- (toys.optflags & FLAG_w) ) {
- xprintf("Active Internet connections ");
+ if (toys.optflags&(FLAG_t|FLAG_u|FLAG_w)) {
+ int pad = (toys.optflags&FLAG_W) ? -51 : -23;
+
+ printf("Active %s (%s servers)\n", "Internet connections", type);
- if (toys.optflags & FLAG_a) xprintf("(servers and established)\n");
- else if (toys.optflags & FLAG_l) xprintf("(only servers)\n");
- else xprintf("(w/o servers)\n");
+ printf("Proto Recv-Q Send-Q %*s %*s State ", pad, "Local Addres",
+ pad, "Foreign Address");
+ if (toys.optflags & FLAG_e) printf(" User Inode ");
+ if (toys.optflags & FLAG_p) printf(" PID/Program Name");
+ xputc('\n');
- show_header();
if (toys.optflags & FLAG_t) {//For TCP
show_ipv4("/proc/net/tcp", "tcp");
show_ipv6("/proc/net/tcp6", "tcp");
@@ -641,21 +560,15 @@ void netstat_main(void)
show_ipv6("/proc/net/raw6", "raw");
}
}
- if (toys.optflags & FLAG_x) {//For UNIX
- xprintf("Active UNIX domain sockets ");
- if (toys.optflags & FLAG_a) xprintf("(servers and established)\n");
- else if (toys.optflags & FLAG_l) xprintf("(only servers)\n");
- else xprintf("(w/o servers)\n");
-
- if (toys.optflags & FLAG_p)
- xprintf("Proto RefCnt Flags Type State "
- "I-Node PID/Program Name Path\n");
- else
- xprintf("Proto RefCnt Flags Type State "
- "I-Node Path\n");
- show_unix_sockets("/proc/net/unix", "unix");
+
+ if (toys.optflags & FLAG_x) {
+ xprintf("Active %s (%s servers)\n", "UNIX domain sockets", type);
+
+ xprintf("Proto RefCnt Flags Type State I-Node %s Path\n",
+ (toys.optflags&FLAG_p) ? "PID/Program Name" : "I-Node");
+ show_unix_sockets();
}
+
if (toys.optflags & FLAG_p) clean_pid_list();
- if (toys.exitval) toys.exitval = 0;
-#undef IS_NETSTAT_PROTO_FLAGS_UP
+ toys.exitval = 0;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 06:56:02 +0000