netstat: code shrink
function old new delta print_inet_line - 193 +193 scan_inet_proc_line - 130 +130 unix_do_one 519 503 -16 do_info 145 97 -48 netstat_main 601 548 -53 tcp_do_one 462 61 -401 raw_do_one 513 107 -406 udp_do_one 533 119 -414 ------------------------------------------------------------------------------ (add/remove: 2/0 grow/shrink: 0/6 up/down: 323/-1338) Total: -1015 bytes
This commit is contained in:
Denis Vlasenko
parent
cf8b1ef845
commit
2c7a1fd6d4
@ -343,11 +343,10 @@ static const char *get_sname(int port, const char *proto, int numeric)
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static char *ip_port_str(struct sockaddr *addr, int port, const char *proto, int numeric)
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{
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enum { salen = USE_FEATURE_IPV6(sizeof(struct sockaddr_in6)) SKIP_FEATURE_IPV6(sizeof(struct sockaddr_in)) };
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char *host, *host_port;
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/* Code which used "*" for INADDR_ANY is removed: it's ambiguous in IPv6,
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* while "0.0.0.0" is not. */
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/* Code which used "*" for INADDR_ANY is removed: it's ambiguous
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* in IPv6, while "0.0.0.0" is not. */
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host = numeric ? xmalloc_sockaddr2dotted_noport(addr)
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: xmalloc_sockaddr2host_noport(addr);
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@ -357,111 +356,79 @@ static char *ip_port_str(struct sockaddr *addr, int port, const char *proto, int
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return host_port;
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}
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static int tcp_do_one(int lnr, char *line)
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{
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char local_addr[64], rem_addr[64];
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char more[512];
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int num, local_port, rem_port, d, state, timer_run, uid, timeout;
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struct inet_params {
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int local_port, rem_port, state, uid;
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#if ENABLE_FEATURE_IPV6
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struct sockaddr_in6 localaddr, remaddr;
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#else
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struct sockaddr_in localaddr, remaddr;
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#endif
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unsigned long rxq, txq, time_len, retr, inode;
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unsigned long rxq, txq, inode;
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};
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if (lnr == 0)
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return 0;
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static int scan_inet_proc_line(struct inet_params *param, char *line)
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{
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int num;
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char local_addr[64], rem_addr[64];
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more[0] = '\0';
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num = sscanf(line,
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"%d: %64[0-9A-Fa-f]:%X %64[0-9A-Fa-f]:%X %X %lX:%lX %X:%lX %lX %d %d %ld %512s\n",
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&d, local_addr, &local_port,
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rem_addr, &rem_port, &state,
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&txq, &rxq, &timer_run, &time_len, &retr, &uid, &timeout, &inode, more);
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if (num < 10) {
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"%*d: %64[0-9A-Fa-f]:%X "
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"%64[0-9A-Fa-f]:%X %X "
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"%lX:%lX %*X:%*X "
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"%*X %d %*d %ld ",
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local_addr, ¶m->local_port,
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rem_addr, ¶m->rem_port, ¶m->state,
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¶m->txq, ¶m->rxq,
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¶m->uid, ¶m->inode);
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if (num < 9) {
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return 1; /* error */
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}
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if (strlen(local_addr) > 8) {
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#if ENABLE_FEATURE_IPV6
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build_ipv6_addr(local_addr, &localaddr);
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build_ipv6_addr(rem_addr, &remaddr);
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build_ipv6_addr(local_addr, ¶m->localaddr);
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build_ipv6_addr(rem_addr, ¶m->remaddr);
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#endif
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} else {
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build_ipv4_addr(local_addr, &localaddr);
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build_ipv4_addr(rem_addr, &remaddr);
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build_ipv4_addr(local_addr, ¶m->localaddr);
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build_ipv4_addr(rem_addr, ¶m->remaddr);
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}
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return 0;
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}
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if ((rem_port && (flags & NETSTAT_CONNECTED))
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|| (!rem_port && (flags & NETSTAT_LISTENING))
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static void print_inet_line(struct inet_params *param,
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const char *state_str, const char *proto, int is_connected)
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{
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if ((is_connected && (flags & NETSTAT_CONNECTED))
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|| (!is_connected && (flags & NETSTAT_LISTENING))
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) {
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char *l = ip_port_str(
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(struct sockaddr *) &localaddr, local_port,
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"tcp", flags & NETSTAT_NUMERIC);
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(struct sockaddr *) ¶m->localaddr, param->local_port,
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proto, flags & NETSTAT_NUMERIC);
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char *r = ip_port_str(
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(struct sockaddr *) &remaddr, rem_port,
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"tcp", flags & NETSTAT_NUMERIC);
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(struct sockaddr *) ¶m->remaddr, param->rem_port,
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proto, flags & NETSTAT_NUMERIC);
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printf(net_conn_line,
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"tcp", rxq, txq, l, r, tcp_state[state]);
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proto, param->rxq, param->txq, l, r, state_str);
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#if ENABLE_FEATURE_NETSTAT_PRG
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if (option_mask32 & OPT_prg)
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printf("%."PROGNAME_WIDTH_STR"s", prg_cache_get(inode));
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printf("%."PROGNAME_WIDTH_STR"s", prg_cache_get(param->inode));
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#endif
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bb_putchar('\n');
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free(l);
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free(r);
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}
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return 0;
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}
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static int udp_do_one(int lnr, char *line)
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static int FAST_FUNC tcp_do_one(char *line)
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{
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char local_addr[64], rem_addr[64];
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const char *state_str;
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char more[512];
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int num, local_port, rem_port, d, state, timer_run, uid, timeout;
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#if ENABLE_FEATURE_IPV6
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struct sockaddr_in6 localaddr, remaddr;
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#else
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struct sockaddr_in localaddr, remaddr;
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#endif
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unsigned long rxq, txq, time_len, retr, inode;
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struct inet_params param;
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if (lnr == 0)
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if (scan_inet_proc_line(¶m, line))
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return 1;
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print_inet_line(¶m, tcp_state[param.state], "tcp", param.rem_port);
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return 0;
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more[0] = '\0';
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num = sscanf(line,
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"%d: %64[0-9A-Fa-f]:%X %64[0-9A-Fa-f]:%X %X %lX:%lX %X:%lX %lX %d %d %ld %512s\n",
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&d, local_addr, &local_port,
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rem_addr, &rem_port, &state,
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&txq, &rxq, &timer_run, &time_len, &retr, &uid, &timeout, &inode, more);
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if (strlen(local_addr) > 8) {
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#if ENABLE_FEATURE_IPV6
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/* Demangle what the kernel gives us */
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build_ipv6_addr(local_addr, &localaddr);
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build_ipv6_addr(rem_addr, &remaddr);
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#endif
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} else {
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build_ipv4_addr(local_addr, &localaddr);
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build_ipv4_addr(rem_addr, &remaddr);
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}
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if (num < 10) {
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return 1; /* error */
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}
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switch (state) {
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case TCP_ESTABLISHED:
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state_str = "ESTABLISHED";
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break;
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case TCP_CLOSE:
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state_str = "";
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break;
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default:
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state_str = "UNKNOWN";
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break;
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}
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#if ENABLE_FEATURE_IPV6
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@ -477,105 +444,53 @@ static int udp_do_one(int lnr, char *line)
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#else
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# define notnull(A) (A.sin_addr.s_addr)
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#endif
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static int FAST_FUNC udp_do_one(char *line)
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{
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int have_remaddr = notnull(remaddr);
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if ((have_remaddr && (flags & NETSTAT_CONNECTED))
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|| (!have_remaddr && (flags & NETSTAT_LISTENING))
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) {
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char *l = ip_port_str(
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(struct sockaddr *) &localaddr, local_port,
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"udp", flags & NETSTAT_NUMERIC);
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char *r = ip_port_str(
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(struct sockaddr *) &remaddr, rem_port,
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"udp", flags & NETSTAT_NUMERIC);
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printf(net_conn_line,
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"udp", rxq, txq, l, r, state_str);
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#if ENABLE_FEATURE_NETSTAT_PRG
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if (option_mask32 & OPT_prg)
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printf("%."PROGNAME_WIDTH_STR"s", prg_cache_get(inode));
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#endif
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bb_putchar('\n');
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free(l);
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free(r);
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}
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int have_remaddr;
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const char *state_str;
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struct inet_params param;
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if (scan_inet_proc_line(¶m, line))
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return 1;
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state_str = "UNKNOWN";
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switch (param.state) {
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case TCP_ESTABLISHED:
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state_str = "ESTABLISHED";
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break;
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case TCP_CLOSE:
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state_str = "";
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break;
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}
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have_remaddr = notnull(param.remaddr);
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print_inet_line(¶m, state_str, "udp", have_remaddr);
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return 0;
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}
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static int raw_do_one(int lnr, char *line)
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static int FAST_FUNC raw_do_one(char *line)
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{
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char local_addr[64], rem_addr[64];
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char more[512];
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int num, local_port, rem_port, d, state, timer_run, uid, timeout;
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#if ENABLE_FEATURE_IPV6
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struct sockaddr_in6 localaddr, remaddr;
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#else
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struct sockaddr_in localaddr, remaddr;
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#endif
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unsigned long rxq, txq, time_len, retr, inode;
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int have_remaddr;
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struct inet_params param;
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if (lnr == 0)
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return 0;
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if (scan_inet_proc_line(¶m, line))
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return 1;
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more[0] = '\0';
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num = sscanf(line,
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"%d: %64[0-9A-Fa-f]:%X %64[0-9A-Fa-f]:%X %X %lX:%lX %X:%lX %lX %d %d %ld %512s\n",
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&d, local_addr, &local_port,
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rem_addr, &rem_port, &state,
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&txq, &rxq, &timer_run, &time_len, &retr, &uid, &timeout, &inode, more);
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if (strlen(local_addr) > 8) {
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#if ENABLE_FEATURE_IPV6
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build_ipv6_addr(local_addr, &localaddr);
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build_ipv6_addr(rem_addr, &remaddr);
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#endif
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} else {
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build_ipv4_addr(local_addr, &localaddr);
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build_ipv4_addr(rem_addr, &remaddr);
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}
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if (num < 10) {
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return 1; /* error */
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}
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{
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int have_remaddr = notnull(remaddr);
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if ((have_remaddr && (flags & NETSTAT_CONNECTED))
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|| (!have_remaddr && (flags & NETSTAT_LISTENING))
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) {
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char *l = ip_port_str(
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(struct sockaddr *) &localaddr, local_port,
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"raw", flags & NETSTAT_NUMERIC);
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char *r = ip_port_str(
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(struct sockaddr *) &remaddr, rem_port,
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"raw", flags & NETSTAT_NUMERIC);
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printf(net_conn_line,
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"raw", rxq, txq, l, r, itoa(state));
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#if ENABLE_FEATURE_NETSTAT_PRG
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if (option_mask32 & OPT_prg)
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printf("%-"PROGNAME_WIDTH_STR"s", prg_cache_get(inode));
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#endif
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bb_putchar('\n');
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free(l);
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free(r);
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}
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}
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have_remaddr = notnull(param.remaddr);
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print_inet_line(¶m, itoa(param.state), "raw", have_remaddr);
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return 0;
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}
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static int unix_do_one(int nr, char *line)
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static int FAST_FUNC unix_do_one(char *line)
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{
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unsigned long refcnt, proto, unix_flags;
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unsigned long inode;
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int type, state;
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int num, path_ofs;
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void *d;
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const char *ss_proto, *ss_state, *ss_type;
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char ss_flags[32];
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if (nr == 0)
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return 0; /* skip header */
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/* 2.6.15 may report lines like "... @/tmp/fam-user-^@^@^@^@^@^@^@..."
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* Other users report long lines filled by NUL bytes.
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* (those ^@ are NUL bytes too). We see them as empty lines. */
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@ -583,9 +498,9 @@ static int unix_do_one(int nr, char *line)
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return 0;
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path_ofs = 0; /* paranoia */
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num = sscanf(line, "%p: %lX %lX %lX %X %X %lu %n",
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&d, &refcnt, &proto, &unix_flags, &type, &state, &inode, &path_ofs);
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if (num < 7) {
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num = sscanf(line, "%*p: %lX %lX %lX %X %X %lu %n",
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&refcnt, &proto, &unix_flags, &type, &state, &inode, &path_ofs);
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if (num < 6) {
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return 1; /* error */
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}
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if ((flags & (NETSTAT_LISTENING|NETSTAT_CONNECTED)) != (NETSTAT_LISTENING|NETSTAT_CONNECTED)) {
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@ -681,34 +596,24 @@ static int unix_do_one(int nr, char *line)
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return 0;
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}
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#define _PATH_PROCNET_UDP "/proc/net/udp"
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#define _PATH_PROCNET_UDP6 "/proc/net/udp6"
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#define _PATH_PROCNET_TCP "/proc/net/tcp"
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#define _PATH_PROCNET_TCP6 "/proc/net/tcp6"
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#define _PATH_PROCNET_RAW "/proc/net/raw"
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#define _PATH_PROCNET_RAW6 "/proc/net/raw6"
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#define _PATH_PROCNET_UNIX "/proc/net/unix"
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static void do_info(const char *file, const char *name, int (*proc)(int, char *))
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static void do_info(const char *file, int FAST_FUNC (*proc)(char *))
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{
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int lnr;
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FILE *procinfo;
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char *buffer;
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procinfo = fopen_for_read(file);
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/* _stdin is just to save "r" param */
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procinfo = fopen_or_warn_stdin(file);
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if (procinfo == NULL) {
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if (errno != ENOENT) {
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bb_simple_perror_msg(file);
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} else {
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bb_error_msg("no kernel support for %s", name);
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}
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return;
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}
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lnr = 0;
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/* Why? because xmalloc_fgets_str doesn't stop on NULs */
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/* Why xmalloc_fgets_str? because it doesn't stop on NULs */
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while ((buffer = xmalloc_fgets_str(procinfo, "\n")) != NULL) {
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if (proc(lnr++, buffer))
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bb_error_msg("%s: bogus data on line %d", file, lnr);
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/* line 0 is skipped */
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if (lnr && proc(buffer))
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bb_error_msg("%s: bogus data on line %d", file, lnr + 1);
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lnr++;
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free(buffer);
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}
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fclose(procinfo);
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@ -719,12 +624,6 @@ int netstat_main(int argc UNUSED_PARAM, char **argv)
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{
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const char *net_conn_line_header = PRINT_NET_CONN_HEADER;
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unsigned opt;
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#if ENABLE_FEATURE_IPV6
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smallint inet = 1;
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smallint inet6 = 1;
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#else
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enum { inet = 1, inet6 = 0 };
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#endif
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INIT_G();
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@ -777,24 +676,24 @@ int netstat_main(int argc UNUSED_PARAM, char **argv)
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print_progname_banner();
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bb_putchar('\n');
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}
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if (inet && (flags & NETSTAT_TCP))
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do_info(_PATH_PROCNET_TCP, "AF INET (tcp)", tcp_do_one);
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if (flags & NETSTAT_TCP) {
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do_info("/proc/net/tcp", tcp_do_one);
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#if ENABLE_FEATURE_IPV6
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if (inet6 && (flags & NETSTAT_TCP))
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do_info(_PATH_PROCNET_TCP6, "AF INET6 (tcp)", tcp_do_one);
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do_info("/proc/net/tcp6", tcp_do_one);
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#endif
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if (inet && (flags & NETSTAT_UDP))
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do_info(_PATH_PROCNET_UDP, "AF INET (udp)", udp_do_one);
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}
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if (flags & NETSTAT_UDP) {
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do_info("/proc/net/udp", udp_do_one);
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#if ENABLE_FEATURE_IPV6
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if (inet6 && (flags & NETSTAT_UDP))
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do_info(_PATH_PROCNET_UDP6, "AF INET6 (udp)", udp_do_one);
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do_info("/proc/net/udp6", udp_do_one);
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#endif
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if (inet && (flags & NETSTAT_RAW))
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do_info(_PATH_PROCNET_RAW, "AF INET (raw)", raw_do_one);
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}
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if (flags & NETSTAT_RAW) {
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do_info("/proc/net/raw", raw_do_one);
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#if ENABLE_FEATURE_IPV6
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if (inet6 && (flags & NETSTAT_RAW))
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do_info(_PATH_PROCNET_RAW6, "AF INET6 (raw)", raw_do_one);
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do_info("/proc/net/raw6", raw_do_one);
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#endif
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}
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if (flags & NETSTAT_UNIX) {
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printf("Active UNIX domain sockets ");
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if ((flags & (NETSTAT_LISTENING|NETSTAT_CONNECTED)) == (NETSTAT_LISTENING|NETSTAT_CONNECTED))
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@ -806,7 +705,7 @@ int netstat_main(int argc UNUSED_PARAM, char **argv)
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printf("\nProto RefCnt Flags Type State I-Node ");
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print_progname_banner();
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printf("Path\n");
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do_info(_PATH_PROCNET_UNIX, "AF UNIX", unix_do_one);
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do_info("/proc/net/unix", unix_do_one);
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}
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||||
prg_cache_clear();
|
||||
return 0;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user