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-rw-r--r--toys/pending/netstat.c219
1 files changed, 131 insertions, 88 deletions
diff --git a/toys/pending/netstat.c b/toys/pending/netstat.c
index 3ee4c5a2..d6acd7a3 100644
--- a/toys/pending/netstat.c
+++ b/toys/pending/netstat.c
@@ -52,7 +52,7 @@ typedef union _iaddr6 {
unsigned char b[16];
} iaddr6;
-#define ADDR_LEN (INET6_ADDRSTRLEN + 1 + 5 + 1) //IPv6 addr len + : + port + '\0'
+#define ADDR_LEN (INET6_ADDRSTRLEN + 1 + 5 + 1)//IPv6 addr len + : + port + '\0'
//For unix states
enum {
@@ -68,21 +68,14 @@ typedef struct _pidlist {
long inode;
char name[21];
} PID_LIST;
-PID_LIST *pid_list = NULL;
-/*
- * locate character in string.
- */
-static char *strchr_nul(char *s, int c)
-{
- while(*s != '\0' && *s != c) s++;
- return (char*)s;
-}
+PID_LIST *pid_list = NULL;
/*
- * used to converts string into int and validate the input str for invalid int value or out-of-range.
+ * used to convert string into int and
+ * validate the input str for invalid int value or out-of-range.
*/
-static unsigned get_strtou(char *str, char **endp, int base)
+static unsigned long get_strtou(char *str, char **endp, int base)
{
unsigned long uli;
char *endptr;
@@ -108,16 +101,20 @@ static unsigned get_strtou(char *str, char **endp, int base)
}
return uli;
}
+
/*
* used to retrive pid name from pid list.
*/
static const char *get_pid_name(unsigned long inode)
{
PID_LIST *tmp;
+
for (tmp = pid_list; tmp; tmp = tmp->next)
if (tmp->inode == inode) return tmp->name;
+
return "-";
}
+
/*
* For TCP/UDP/RAW display data.
*/
@@ -126,8 +123,9 @@ static void display_data(unsigned rport, char *label,
unsigned state, unsigned uid, unsigned long inode)
{
char *ss_state = "UNKNOWN", buf[12];
- char *state_label[] = {"", "ESTABLISHED", "SYN_SENT", "SYN_RECV", "FIN_WAIT1", "FIN_WAIT2",
- "TIME_WAIT", "CLOSE", "CLOSE_WAIT", "LAST_ACK", "LISTEN", "CLOSING", "UNKNOWN"};
+ char *state_label[] = {"", "ESTABLISHED", "SYN_SENT", "SYN_RECV", "FIN_WAIT1",
+ "FIN_WAIT2", "TIME_WAIT", "CLOSE", "CLOSE_WAIT",
+ "LAST_ACK", "LISTEN", "CLOSING", "UNKNOWN"};
char user[11];
struct passwd *pw;
@@ -147,12 +145,14 @@ static void display_data(unsigned rport, char *label,
} else snprintf(user, sizeof(user), "%d", uid);
xprintf("%3s %6d %6d ", label, rxq, txq);
- xprintf((toys.optflags & FLAG_W) ? "%-51.51s %-51.51s " : "%-23.23s %-23.23s ", lip, rip);
+ xprintf((toys.optflags & FLAG_W) ? "%-51.51s %-51.51s " : "%-23.23s %-23.23s "
+ , lip, rip);
xprintf("%-11s ", ss_state);
- if ((toys.optflags & FLAG_e)) xprintf("%-10s %-11d ", user, inode);
+ if ((toys.optflags & FLAG_e)) xprintf("%-10s %-11ld ", user, inode);
if ((toys.optflags & FLAG_p)) xprintf("%s", get_pid_name(inode));
xputc('\n');
}
+
/*
* For TCP/UDP/RAW show data.
*/
@@ -161,11 +161,15 @@ static void show_data(unsigned rport, char *label, unsigned rxq, unsigned txq,
unsigned long inode)
{
if (toys.optflags & FLAG_l) {
- if (!rport && (state & 0xA)) display_data(rport, label, rxq, txq, lip, rip, state, uid, inode);
- } else if (toys.optflags & FLAG_a) display_data(rport, label, rxq, txq, lip, rip, state, uid, inode);
+ if (!rport && (state & 0xA))
+ display_data(rport, label, rxq, txq, lip, rip, state, uid, inode);
+ } else if (toys.optflags & FLAG_a)
+ display_data(rport, label, rxq, txq, lip, rip, state, uid, inode);
//rport && (TCP | UDP | RAW)
- else if (rport & (0x10 | 0x20 | 0x40)) display_data(rport, label, rxq, txq, lip, rip, state, uid, inode);
+ else if (rport & (0x10 | 0x20 | 0x40))
+ display_data(rport, label, rxq, txq, lip, rip, state, uid, inode);
}
+
/*
* used to get service name.
*/
@@ -177,6 +181,7 @@ static char *get_servname(int port, char *label)
if (ser) return xmprintf("%s", ser->s_name);
return xmprintf("%u", (unsigned)ntohs(lport));
}
+
/*
* used to convert address into text format.
*/
@@ -210,7 +215,8 @@ static void addr2str(int af, void *addr, unsigned port, char *buf, char *label)
else sock_len = sizeof(struct sockaddr_in6);
for (rp = result; rp; rp = rp->ai_next)
- if (!getnameinfo(rp->ai_addr, sock_len, hbuf, sizeof(hbuf), sbuf, sizeof(sbuf), NI_NUMERICSERV))
+ if (!getnameinfo(rp->ai_addr, sock_len, hbuf, sizeof(hbuf), sbuf,
+ sizeof(sbuf), NI_NUMERICSERV))
break;
freeaddrinfo(result);
@@ -228,17 +234,20 @@ static void addr2str(int af, void *addr, unsigned port, char *buf, char *label)
else snprintf(ip+iplen, ADDR_LEN-iplen, ":%d", port);
memcpy(buf, ip, ADDR_LEN);
}
+
/*
* display ipv4 info for TCP/UDP/RAW.
*/
static void show_ipv4(char *fname, char *label)
{
- FILE *fp = fopen((char *)fname, "r");
+ FILE *fp = fopen(fname, "r");
if (!fp) {
perror_msg("'%s'", fname);
return;
}
- fgets(toybuf, sizeof(toybuf), fp); //skip header.
+
+ if(!fgets(toybuf, sizeof(toybuf), fp)) return; //skip header.
+
while (fgets(toybuf, sizeof(toybuf), fp)) {
char lip[ADDR_LEN] = {0,}, rip[ADDR_LEN] = {0,};
iaddr laddr, raddr;
@@ -246,7 +255,8 @@ static void show_ipv4(char *fname, char *label)
unsigned long inode;
int nitems = sscanf(toybuf, " %d: %x:%x %x:%x %x %x:%x %*X:%*X %*X %d %*d %ld",
- &num, &laddr.u, &lport, &raddr.u, &rport, &state, &txq, &rxq, &uid, &inode);
+ &num, &laddr.u, &lport, &raddr.u, &rport, &state, &txq,
+ &rxq, &uid, &inode);
if (nitems == 10) {
addr2str(AF_INET, &laddr, lport, lip, label);
addr2str(AF_INET, &raddr, rport, rip, label);
@@ -255,25 +265,31 @@ static void show_ipv4(char *fname, char *label)
}//End of While
fclose(fp);
}
+
/*
* display ipv6 info for TCP/UDP/RAW.
*/
static void show_ipv6(char *fname, char *label)
{
- FILE *fp = fopen((char *)fname, "r");
+ FILE *fp = fopen(fname, "r");
if (!fp) {
perror_msg("'%s'", fname);
return;
}
- fgets(toybuf, sizeof(toybuf), fp); //skip header.
+
+ if(!fgets(toybuf, sizeof(toybuf), fp)) return; //skip header.
+
while (fgets(toybuf, sizeof(toybuf), fp)) {
char lip[ADDR_LEN] = {0,}, rip[ADDR_LEN] = {0,};
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, &laddr6.u.d, &lport, &raddr6.u.a, &raddr6.u.b,
- &raddr6.u.c, &raddr6.u.d, &rport, &state, &txq, &rxq, &uid, &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,
+ &laddr6.u.d, &lport, &raddr6.u.a, &raddr6.u.b,
+ &raddr6.u.c, &raddr6.u.d, &rport, &state, &txq, &rxq,
+ &uid, &inode);
if (nitems == 16) {
addr2str(AF_INET6, &laddr6, lport, lip, label);
addr2str(AF_INET6, &raddr6, rport, rip, label);
@@ -282,6 +298,7 @@ static void show_ipv6(char *fname, char *label)
}//End of While
fclose(fp);
}
+
/*
* display unix socket info.
*/
@@ -292,30 +309,39 @@ static void show_unix_sockets(char *fname, char *label)
perror_msg("'%s'", fname);
return;
}
- fgets(toybuf, sizeof(toybuf), fp); //skip header.
+
+ if(!fgets(toybuf, sizeof(toybuf), fp)) return; //skip header.
+
while (fgets(toybuf, sizeof(toybuf), fp)) {
- unsigned long int refcount, label, flags, inode;
+ 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;
+ char sock_flags[32] = {0,}, *sock_type, *sock_state, *bptr = toybuf, *term;
if (!toybuf[0]) continue;
+
nitems = sscanf(toybuf, "%*p: %lX %lX %lX %X %X %lu %n",
&refcount, &label, &flags, &type, &state, &inode, &path_offset);
+
//for state one less
if (nitems < 6) break;
+
if (toys.optflags & FLAG_l) {
- if ( !((state == SOCK_NOT_CONNECTED) && (flags & SOCK_ACCEPTCON)) ) continue;
+ if ( !((state == SOCK_NOT_CONNECTED) && (flags & SOCK_ACCEPTCON)) )
+ continue;
} else if (!(toys.optflags & FLAG_a)) {
if ((state == SOCK_NOT_CONNECTED) && (flags & SOCK_ACCEPTCON)) continue;
}
//prepare socket type, state and flags.
{
- char *ss_type[] = { "", "STREAM", "DGRAM", "RAW", "RDM", "SEQPACKET", "UNKNOWN"};
- char *ss_state[] = { "FREE", "LISTENING", "CONNECTING", "CONNECTED", "DISCONNECTING", "UNKNOWN"};
+ 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];
+ 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]);
@@ -331,15 +357,17 @@ static void show_unix_sockets(char *fname, char *label)
if (flags & SOCK_NO_SPACE) strcat(sock_flags, "N ");
strcat(sock_flags, "]");
}
- xprintf("%-5s %-6ld %-11s %-10s %-13s %8lu ", (!label ? "unix" : "??"), refcount, sock_flags, sock_type, sock_state, inode);
+ 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;
- *strchr_nul(bptr, '\n') = '\0';
+ if ((term = strchr(bptr, '\n'))) *term = '\0';
xprintf("%s\n", bptr);
}//End of while
fclose(fp);
}
+
/*
* extract inode value from the link.
*/
@@ -359,16 +387,19 @@ static long ss_inode(char *link)
}
return inode;
}
+
/*
* add inode and progname in the pid list.
*/
static void add2list(long inode)
{
PID_LIST *node = pid_list;
+
for(; node; node = node->next) {
if(node->inode == inode)
return;
}
+
PID_LIST *new = (PID_LIST *)xzalloc(sizeof(PID_LIST));
new->inode = inode;
xstrncpy(new->name, TT.current_name, sizeof(new->name));
@@ -423,6 +454,7 @@ static int scan_pids(struct dirtree *node)
if (!node->parent) return DIRTREE_RECURSE;
if ((pid = atol(node->name))) scan_pid(pid);
+
return 0;
}
@@ -438,12 +470,13 @@ static void clean_pid_list(void)
pid_list = tmp;
}
}
+
/*
* For TCP/UDP/RAW show the header.
*/
static void show_header(void)
{
- xprintf("\nProto Recv-Q Send-Q ");
+ xprintf("Proto Recv-Q Send-Q ");
xprintf((toys.optflags & FLAG_W) ? "%-51s %-51s" : "%-23s %-23s",
"Local Address", "Foreign Address");
xprintf(" State ");
@@ -451,13 +484,14 @@ static void show_header(void)
if (toys.optflags & FLAG_p) xprintf(" PID/Program Name");
xputc('\n');
}
+
/*
* used to get the flag values for route command.
*/
-static void get_flag_value(char **flagstr, int flags)
+static void get_flag_value(char *flagstr, int flags)
{
int i = 0;
- char *str = *flagstr;
+ char *str = flagstr;
static const char flagchars[] = "GHRDMDAC";
static const unsigned flagarray[] = {
RTF_GATEWAY,
@@ -470,10 +504,12 @@ static void get_flag_value(char **flagstr, int flags)
RTF_CACHE
};
*str++ = 'U';
+
while ( (*str = flagchars[i]) ) {
if (flags & flagarray[i++]) ++str;
}
}
+
/*
* extract inet4 route info from /proc/net/route file and display it.
*/
@@ -483,85 +519,87 @@ static void display_routes(int is_more_info, int notresolve)
unsigned long dest, gate, mask;
int flags, ref, use, metric, mss, win, irtt;
char iface[64]={0,};
- char *flag_val = xzalloc(10); //there are 9 flags "UGHRDMDAC" for route.
+ char flag_val[10]={0,}; //there are 9 flags "UGHRDMDAC" for route.
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");
- fgets(toybuf, sizeof(toybuf), fp); //skip 1st line.
+ "Destination Gateway Genmask Flags %s Iface\n",
+ is_more_info ? " MSS Window irtt" : "Metric Ref Use");
+
while (fgets(toybuf, sizeof(toybuf), fp)) {
int nitems = 0;
char *destip = NULL, *gateip = NULL, *maskip = NULL;
- memset(flag_val, 0, 10);
- 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);
+ 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");
}
+
//skip down interfaces.
if (!(flags & RTF_UP)) continue;
if (dest) {//For Destination
- if (inet_ntop(AF_INET, &dest, toybuf, sizeof(toybuf)) ) destip = xstrdup(toybuf);
+ 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");
}
+
if (gate) {//For Gateway
- if (inet_ntop(AF_INET, &gate, toybuf, sizeof(toybuf)) ) gateip = xstrdup(toybuf);
+ if (inet_ntop(AF_INET, &gate, toybuf, sizeof(toybuf)) )
+ gateip = xstrdup(toybuf);
} else {
if (!notresolve) gateip = xstrdup("*");
else gateip = xstrdup("0.0.0.0");
}
+
//For Mask
- if (inet_ntop(AF_INET, &mask, toybuf, sizeof(toybuf)) ) maskip = xstrdup(toybuf);
+ if (inet_ntop(AF_INET, &mask, toybuf, sizeof(toybuf)) )
+ maskip = xstrdup(toybuf);
//Get flag Values
- get_flag_value(&flag_val, (flags & IPV4_MASK));
+ get_flag_value(flag_val, flags & IPV4_MASK);
if (flags & RTF_REJECT) flag_val[0] = '!';
+
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);
+ else xprintf("%-6d %-2d %7d %s\n", metric, ref, use, iface);
+
if (destip) free(destip);
if (gateip) free(gateip);
if (maskip) free(maskip);
- if (is_more_info) xprintf("%5d %-5d %6d %s\n", mss, win, irtt, iface);
- else xprintf("%-6d %-2d %7d %s\n", metric, ref, use, iface);
}//end of while.
fclose(fp);
- if (flag_val) free(flag_val);
#undef IPV4_MASK
- return;
}
+
/*
- * netstat utily main function.
+ * netstat utility main function.
*/
void netstat_main(void)
{
-#define IS_NETSTAT_PROTO_FLAGS_UP (toys.optflags & (FLAG_t | FLAG_u | FLAG_w | FLAG_x))
- int flag_listen_and_all = 0;
+#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;
- //When a is set
- if (toys.optflags & FLAG_a) flag_listen_and_all = 1;
- //when a and l both are set
- if ( (toys.optflags & FLAG_a) && (toys.optflags & FLAG_l) )
- toys.optflags &= ~FLAG_l;
- //when only a is set
- if ( (toys.optflags & FLAG_a) && (!IS_NETSTAT_PROTO_FLAGS_UP) )
- toys.optflags |= FLAG_t | FLAG_u | FLAG_w | FLAG_x;
- //when only l is set
- if ( (toys.optflags & FLAG_l) && (!IS_NETSTAT_PROTO_FLAGS_UP) )
- toys.optflags |= FLAG_t | FLAG_u | FLAG_w | FLAG_x;
- //when only e/n is set
- if( ((toys.optflags & FLAG_e) || (toys.optflags & FLAG_n)) && (!IS_NETSTAT_PROTO_FLAGS_UP) )
- toys.optflags |= FLAG_t | FLAG_u | FLAG_w | FLAG_x;
- //when W is set
- if ( (toys.optflags & FLAG_W) && (!IS_NETSTAT_PROTO_FLAGS_UP) )
- toys.optflags |= FLAG_t | FLAG_u | FLAG_w | FLAG_x;
- //when p is set
- if ( (toys.optflags & FLAG_p) && (!IS_NETSTAT_PROTO_FLAGS_UP) )
+ // 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.
@@ -581,12 +619,13 @@ void netstat_main(void)
}
//For TCP/UDP/RAW.
- if ( (toys.optflags & FLAG_t) || (toys.optflags & FLAG_u) || (toys.optflags & FLAG_w) ) {
+ if ( (toys.optflags & FLAG_t) || (toys.optflags & FLAG_u) ||
+ (toys.optflags & FLAG_w) ) {
xprintf("Active Internet connections ");
- if (flag_listen_and_all) xprintf("(servers and established)");
- else if (toys.optflags & FLAG_l) xprintf("(only servers)");
- else xprintf("(w/o servers)");
+ 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");
show_header();
if (toys.optflags & FLAG_t) {//For TCP
@@ -602,14 +641,18 @@ void netstat_main(void)
show_ipv6("/proc/net/raw6", "raw");
}
}
- if (toys.optflags & FLAG_x) {//For UNIX.
+ if (toys.optflags & FLAG_x) {//For UNIX
xprintf("Active UNIX domain sockets ");
- if (flag_listen_and_all) xprintf("(servers and established)");
- else if (toys.optflags & FLAG_l) xprintf("(only servers)");
- else xprintf("(w/o servers)");
-
- if (toys.optflags & FLAG_p) xprintf("\nProto RefCnt Flags Type State I-Node PID/Program Name Path\n");
- else xprintf("\nProto RefCnt Flags Type State I-Node Path\n");
+ 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_p) clean_pid_list();
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-17 13:25:41 +0000