diff options
Diffstat (limited to 'src/conn-tools/s6-tcpserver-access.c')
| -rw-r--r-- | src/conn-tools/s6-tcpserver-access.c | 430 |
1 files changed, 230 insertions, 200 deletions
diff --git a/src/conn-tools/s6-tcpserver-access.c b/src/conn-tools/s6-tcpserver-access.c index 8db7bf9..4fa0b9c 100644 --- a/src/conn-tools/s6-tcpserver-access.c +++ b/src/conn-tools/s6-tcpserver-access.c @@ -8,19 +8,15 @@ #include <skalibs/gccattributes.h> #include <skalibs/types.h> -#include <skalibs/prog.h> -#include <skalibs/strerr.h> -#include <skalibs/sgetopt.h> +#include <skalibs/envexec.h> #include <skalibs/buffer.h> #include <skalibs/stralloc.h> #include <skalibs/genalloc.h> #include <skalibs/cdb.h> #include <skalibs/tai.h> -#include <skalibs/env.h> #include <skalibs/djbunix.h> #include <skalibs/socket.h> #include <skalibs/ip46.h> -#include <skalibs/exec.h> #include <skalibs/unix-timed.h> #include <s6/accessrules.h> @@ -34,100 +30,119 @@ #include <execline/config.h> #endif - /* XXX: this file is super ugly and full of tech debt */ - #define NAME "s6-tcpserver-access" #define USAGE NAME " [ -v verbosity ] [ -W | -w ] [ -D | -d ] [ -H ] [ -h ] [ -R | -r ] [ -P | -p ] [ -l localname ] [ -B banner ] [ -t timeout ] [ -i rulesdir | -x rulesfile ] prog..." #define dieusage() strerr_dieusage(100, USAGE) #define dienomem() strerr_diefu1sys(111, "update environment") -#define X() strerr_dief1x(101, "internal inconsistency. Please submit a bug-report.") +#define X() strerr_dief(101, "internal inconsistency. Please submit a bug-report.") + +enum golb_e +{ + GOLB_FATAL = 0x01, + GOLB_NODELAY = 0x02, + GOLB_NODNS = 0x04, + GOLB_HOSTS = 0x08, + GOLB_IDENT = 0x10, + GOLB_PARANOID = 0x20, +} ; -static void logit (pid_t pid, ip46 const *ip, int h) +enum gola_e +{ + GOLA_VERBOSITY, + GOLA_LOCALNAME, + GOLA_BANNER, + GOLA_TIMEOUT, + GOLA_RULESDIR, + GOLA_RULESFILE, + GOLA_N +} ; + +static inline void logit (ip46 const *ip, int h) { - char fmtpid[PID_FMT] ; char fmtip[IP46_FMT] ; fmtip[ip46_fmt(fmtip, ip)] = 0 ; - fmtpid[pid_fmt(fmtpid, pid)] = 0 ; - if (h) strerr_warni5x("allow", " pid ", fmtpid, " ip ", fmtip) ; - else strerr_warni5x("deny", " pid ", fmtpid, " ip ", fmtip) ; + if (h) strerr_warni("allow", " ip ", fmtip) ; + else strerr_warni("deny", " ip ", fmtip) ; } -static inline void log_accept (pid_t pid, ip46 const *ip) +static inline void log_accept (ip46 const *ip) { - logit(pid, ip, 1) ; + logit(ip, 1) ; } -static inline void log_deny (pid_t pid, ip46 const *ip) +static inline void log_deny (ip46 const *ip) { - logit(pid, ip, 0) ; + logit(ip, 0) ; } -#define PROGNAME "s6-tcpserver-access" - int main (int argc, char const *const *argv) { - s6_accessrules_params_t params = S6_ACCESSRULES_PARAMS_ZERO ; + static gol_bool const rgolb[] = + { + { .so = 'W', .lo = "no-fatal", .clear = GOLB_FATAL, .set = 0 }, + { .so = 'w', .lo = "fatal", .clear = 0, .set = GOLB_FATAL }, + { .so = 'd', .lo = "delay", .clear = GOLB_NODELAY, .set = 0 }, + { .so = 'D', .lo = "no-delay", .clear = 0, .set = GOLB_NODELAY }, + { .so = 0, .lo = "dns", .clear = GOLB_NODNS, .set = 0 }, + { .so = 'H', .lo = "no-dns", .clear = GOLB_HOSTS | GOLB_PARANOID, .set = GOLB_NODNS }, + { .so = 0, .lo = "no-hosts", .clear = GOLB_HOSTS, .set = 0 }, + { .so = 'h', .lo = "hosts", .clear = 0, .set = GOLB_HOSTS }, + { .so = 'R', .lo = "no-ident", .clear = GOLB_IDENT, .set = 0 }, + { .so = 'r', .lo = "ident", .clear = 0, .set = GOLB_IDENT }, + { .so = 'p', .lo = "no-paranoid", .clear = GOLB_PARANOID, .set = 0 }, + { .so = 'P', .lo = "paranoid", .clear = GOLB_NODNS, .set = GOLB_PARANOID }, + } ; + static gol_arg const rgola[] = + { + { .so = 'v', .lo = "verbosity", .i = GOLA_VERBOSITY }, + { .so = 'l', .lo = "localname", .i = GOLA_LOCALNAME }, + { .so = 'B', .lo = "banner", .i = GOLA_BANNER }, + { .so = 't', .lo = "timeout", .i = GOLA_TIMEOUT }, + { .so = 'i', .lo = "rulesdir", .i = GOLA_RULESDIR }, + { .so = 'x', .lo = "rulesfile", .i = GOLA_RULESFILE }, + } ; + uint64_t wgolb = 0 ; + char const *wgola[GOLA_N] = { 0 } ; stralloc modifs = STRALLOC_ZERO ; - tain deadline, tto ; - char const *rulestypestr[3] = { "no", "fs", "cdb" } ; - char const *rules = 0 ; - char const *localname = 0 ; + tain deadline = TAIN_INFINITE_RELATIVE ; char const *proto ; cdb c = CDB_ZERO ; - unsigned int rulestype = 0 ; unsigned int verbosity = 1 ; + int e = 0 ; size_t protolen ; - s6_accessrules_result_t accepted ; - ip46 remoteip, localip ; - int flagfatal = 0, flagnodelay = 0, flagdnslookup = 1, flaghosts = 0, - flagident = 0, flagparanoid = 0, e = 0 ; + s6_accessrules_params_t params = S6_ACCESSRULES_PARAMS_ZERO ; + s6_accessrules_result_t accepted = S6_ACCESSRULES_ALLOW ; uint16_t remoteport, localport ; - PROG = NAME ; + ip46 remoteip, localip ; + char prog_storage[PROG_pid_len(NAME)] ; + PROG_pid_fill(prog_storage, NAME) ; + PROG = prog_storage ; + + { + unsigned int golc = GOL_main(argc, argv, rgolb, rgola, &wgolb, wgola) ; + argc -= golc ; argv += golc ; + if (!argc) dieusage() ; + } + + if (wgola[GOLA_VERBOSITY]) + { + if (!uint0_scan(wgola[GOLA_VERBOSITY], &verbosity)) dieusage() ; + } + + if (wgola[GOLA_TIMEOUT]) { unsigned int timeout = 0 ; - subgetopt l = SUBGETOPT_ZERO ; - for (;;) - { - int opt = subgetopt_r(argc, argv, "WwDdHhRrPpv:l:B:t:i:x:", &l) ; - if (opt == -1) break ; - switch (opt) - { - case 'W' : flagfatal = 0 ; break ; - case 'w' : flagfatal = 1 ; break ; - case 'D' : flagnodelay = 1 ; break ; - case 'd' : flagnodelay = 0 ; break ; - case 'H' : flagdnslookup = 0 ; break ; - case 'h' : flaghosts = 1 ; break ; - case 'R' : flagident = 0 ; break ; - case 'r' : flagident = 1 ; break ; - case 'P' : flagparanoid = 0 ; break ; - case 'p' : flagparanoid = 1 ; break ; - case 'v' : if (!uint0_scan(l.arg, &verbosity)) dieusage() ; break ; - case 'l' : localname = l.arg ; break ; - case 'B' : - { - size_t n = strlen(l.arg) ; - if (buffer_putnoflush(buffer_1small, l.arg, n) < (ssize_t)n) - strerr_dief1x(100, "banner too long") ; - break ; - } - case 't' : if (!uint0_scan(l.arg, &timeout)) dieusage() ; break ; - case 'i' : rules = l.arg ; rulestype = 1 ; break ; - case 'x' : rules = l.arg ; rulestype = 2 ; break ; - default : dieusage() ; - } - } - argc -= l.ind ; argv += l.ind ; - if (timeout) tain_from_millisecs(&tto, timeout) ; - else tto = tain_infinite_relative ; + if (!uint0_scan(wgola[GOLA_TIMEOUT], &timeout)) dieusage() ; + if (timeout) tain_from_millisecs(&deadline, timeout) ; } + if (!argc) dieusage() ; if (!*argv[0]) dieusage() ; - if (flagparanoid) flagdnslookup = 1 ; proto = getenv("PROTO") ; if (!proto) strerr_dienotset(100, "PROTO") ; protolen = strlen(proto) ; + { char const *x ; char tmp[protolen + 11] ; @@ -150,47 +165,40 @@ int main (int argc, char const *const *argv) if (!uint160_scan(x, &remoteport)) strerr_dieinvalid(100, tmp) ; } - char prog_storage[PROG_pid_len(NAME)] ; - PROG_pid_fill(prog_storage, NAME) ; - PROG = prog_storage ; + tain_now_set_stopwatch_g() ; + tain_add_g(&deadline, &deadline) ; - if (flagnodelay) + if (wgolb & GOLB_NODELAY) { if (socket_tcpnodelay(1) < 0) if (verbosity) strerr_warnwu1sys("socket_tcpnodelay") ; } - tain_now_set_stopwatch_g() ; - tain_add_g(&deadline, &tto) ; - if (!buffer_timed_flush_g(buffer_1small, &deadline)) - strerr_diefu1sys(111, "write banner") ; - switch (rulestype) + if (wgola[GOLA_BANNER]) + { + size_t bannerlen = strlen(wgola[GOLA_BANNER]) ; + if (buffer_timed_put_g(buffer_1small, wgola[GOLA_BANNER], bannerlen, &deadline) < bannerlen + || !buffer_timed_flush_g(buffer_1small, &deadline)) + strerr_diefusys(111, "write banner") ; + } + + if (wgola[GOLA_RULESDIR]) + accepted = s6_accessrules_ip46_fs(&remoteip, wgola[GOLA_RULESDIR], ¶ms) ; + else if (wgola[GOLA_RULESFILE]) { - case 0 : - accepted = S6_ACCESSRULES_ALLOW ; - break ; - case 1 : - accepted = s6_accessrules_ip46_fs(&remoteip, (void *)rules, ¶ms) ; - break ; - case 2 : - if (!cdb_init(&c, rules)) strerr_diefu2sys(111, "cdb_init ", rules) ; - accepted = s6_accessrules_ip46_cdb(&remoteip, &c, ¶ms) ; - if (accepted == S6_ACCESSRULES_ALLOW) cdb_free(&c) ; - break ; - default : X() ; + if (!cdb_init(&c, wgola[GOLA_RULESFILE])) strerr_diefusys(111, "cdb_init ", wgola[GOLA_RULESFILE]) ; + accepted = s6_accessrules_ip46_cdb(&remoteip, &c, ¶ms) ; + if (accepted == S6_ACCESSRULES_ALLOW) cdb_free(&c) ; } + switch (accepted) { case S6_ACCESSRULES_ERROR : - strerr_diefu6sys(111, "check ", rulestypestr[rulestype], " ruleset for ", "IP", " in ", rules) ; + strerr_diefusys(111, "check ruleset for ", "IP", " in ", wgola[GOLA_RULESDIR] ? wgola[GOLA_RULESDIR] : wgola[GOLA_RULESFILE]) ; case S6_ACCESSRULES_ALLOW : break ; - case S6_ACCESSRULES_DENY : - if (verbosity >= 2) log_deny(getpid(), &remoteip) ; - return 1 ; case S6_ACCESSRULES_NOTFOUND : - if (flagdnslookup) break ; - if (verbosity >= 2) log_deny(getpid(), &remoteip) ; - return 1 ; + if (!(wgolb & GOLB_NODNS)) break ; + case S6_ACCESSRULES_DENY : e = 1 ; goto reject ; default: X() ; } @@ -200,13 +208,13 @@ int main (int argc, char const *const *argv) char tmp[protolen + 11] ; memcpy(tmp, proto, protolen) ; memcpy(tmp + protolen, "REMOTEINFO", 11) ; - if (flagident) + if (wgolb & GOLB_IDENT) { ssize_t r = s6net_ident_client_g(idbuf, S6NET_IDENT_ID_SIZE, &remoteip, remoteport, &localip, localport, &deadline) ; if (r < 0) { - if (verbosity >= 3) strerr_warnwu1sys("s6net_ident_client") ; - if (flagfatal) + if (verbosity >= 3) strerr_warnwusys("s6net_ident_client") ; + if (wgolb & GOLB_FATAL) { e = errno == ETIMEDOUT ? 99 : 111 ; goto reject ; @@ -214,8 +222,8 @@ int main (int argc, char const *const *argv) } else if (!r) { - if (verbosity >= 3) strerr_warnw2x("ident server replied: ", s6net_ident_error_str(errno)) ; - if (flagfatal) + if (verbosity >= 3) strerr_warnw("ident server replied: ", s6net_ident_error_str(errno)) ; + if (wgolb & GOLB_FATAL) { e = 2 ; goto reject ; @@ -226,12 +234,12 @@ int main (int argc, char const *const *argv) if (!env_addmodif(&modifs, tmp, x)) dienomem() ; } - if (!flagdnslookup) + if (wgolb & GOLB_NODNS) { char tmp[protolen + 11] ; memcpy(tmp, proto, protolen) ; memcpy(tmp + protolen, "LOCALHOST", 10) ; - if (!env_addmodif(&modifs, tmp, localname)) dienomem() ; + if (!env_addmodif(&modifs, tmp, wgola[GOLA_LOCALNAME])) dienomem() ; memcpy(tmp + protolen, "REMOTEHOST", 11) ; if (!env_addmodif(&modifs, tmp, 0)) dienomem() ; } @@ -242,8 +250,7 @@ int main (int argc, char const *const *argv) tain infinite ; s6dns_dpag_t data[2] = { S6DNS_DPAG_ZERO, S6DNS_DPAG_ZERO } ; s6dns_resolve_t blob[2] ; - char remotebuf[256] ; - size_t remotelen = 0 ; + int gotname = 0 ; char tcplocalhost[(protolen << 1) + 21] ; char *tcpremotehost = tcplocalhost + protolen + 10 ; memcpy(tcplocalhost, proto, protolen) ; @@ -251,56 +258,66 @@ int main (int argc, char const *const *argv) memcpy(tcpremotehost, proto, protolen) ; memcpy(tcpremotehost + protolen, "REMOTEHOST", 11) ; tain_add_g(&infinite, &tain_infinite_relative) ; + if (wgola[GOLA_LOCALNAME]) + { + if (!env_addmodif(&modifs, tcplocalhost, wgola[GOLA_LOCALNAME])) dienomem() ; + gotname |= 1 ; + } - if (!s6dns_init_options(flaghosts)) + if (!s6dns_init_options(!!(wgolb & GOLB_HOSTS))) { - if (verbosity >= 2) strerr_warnwu1sys("init DNS") ; - if (flagfatal) + if (wgolb & GOLB_FATAL) { e = 111 ; + if (verbosity >= 2) strerr_warnfusys("init DNS") ; goto reject ; } + if (verbosity >= 2) strerr_warnwusys("init DNS") ; + goto afterdns ; } - if (flaghosts) + if (wgolb & GOLB_HOSTS) { int r = s6dns_hosts_name(remoteip.ip, &sa, &ga, ip46_is6(&remoteip)) ; if (r == -1) { - if (verbosity >= 2) strerr_warnwu3sys("look up ", "remote", " ip in hosts database") ; - if (flagfatal) + if (wgolb & GOLB_FATAL) { e = 111 ; + if (verbosity >= 2) strerr_warnfusys("look up ", "remote", " ip in hosts database") ; goto reject ; } + if (verbosity >= 2) strerr_warnwusys("look up ", "remote", " ip in hosts database") ; } - if (r) + else if (r) { - remotelen = strlen(sa.s + genalloc_s(size_t, &ga)[0]) ; - if (remotelen > 255) remotelen = 255 ; - memcpy(remotebuf, sa.s + genalloc_s(size_t, &ga)[0], remotelen + 1) ; + if (!env_addmodif(&modifs, tcpremotehost, sa.s + genalloc_s(size_t, &ga)[0])) dienomem() ; genalloc_setlen(size_t, &ga, 0) ; sa.len = 0 ; + gotname |= 2 ; } - if (!localname) + if (!(gotname & 1)) { r = s6dns_hosts_name(localip.ip, &sa, &ga, ip46_is6(&localip)) ; if (r == -1) { - if (verbosity >= 2) strerr_warnwu3sys("look up ", "local", " ip in hosts database") ; - if (flagfatal) + if (wgolb & GOLB_FATAL) { e = 111 ; + if (verbosity >= 2) strerr_warnfusys("look up ", "local", " ip in hosts database") ; goto reject ; } + if (verbosity >= 2) strerr_warnwusys("look up ", "local", " ip in hosts database") ; + } + else if (r) + { + if (!env_addmodif(&modifs, tcplocalhost, sa.s + genalloc_s(size_t, &ga)[0])) dienomem() ; + genalloc_setlen(size_t, &ga, 0) ; + sa.len = 0 ; + gotname |= 1 ; } - if (r) localname = sa.s + genalloc_s(size_t, &ga)[0] ; } } - if (localname) - { - if (!env_addmodif(&modifs, tcplocalhost, localname)) dienomem() ; - } - else + if (!(gotname & 1)) { s6dns_domain_arpafromip46(&blob[0].q, &localip) ; s6dns_domain_encode(&blob[0].q) ; @@ -311,7 +328,7 @@ int main (int argc, char const *const *argv) blob[0].options = S6DNS_O_RECURSIVE ; data[0].rtype = S6DNS_T_PTR ; } - if (!remotelen) + if (!(gotname & 2)) { s6dns_domain_arpafromip46(&blob[1].q, &remoteip) ; s6dns_domain_encode(&blob[1].q) ; @@ -322,24 +339,22 @@ int main (int argc, char const *const *argv) blob[1].options = S6DNS_O_RECURSIVE ; data[1].rtype = S6DNS_T_PTR ; } - if (!(localname && remotelen) && !s6dns_resolven_parse_g(blob + !!localname, !localname + !remotelen, &infinite)) - { - if (verbosity >= 3) strerr_warnwu2x("resolve IP addresses: ", s6dns_constants_error_str(errno)) ; - if (flagfatal) - { - e = errno == ENOENT ? 1 : 111 ; - goto reject ; - } - } - else + + if (gotname < 3) { - if (!localname) + if (!s6dns_resolven_parse_g(blob + (gotname & 1), !(gotname & 1) + !(gotname & 2), &infinite)) { - if (blob[0].status) + if (wgolb & GOLB_FATAL) { - if (!env_addmodif(&modifs, tcplocalhost, 0)) dienomem() ; + e = errno == ENOENT ? 1 : 111 ; + if (verbosity >= 3) strerr_warnfu("resolve IP addresses: ", s6dns_constants_error_str(errno)) ; + goto reject ; } - else + if (verbosity >= 3) strerr_warnwu("resolve IP addresses: ", s6dns_constants_error_str(errno)) ; + } + else + { + if (!(gotname & 1) && !blob[0].status) { char s[256] ; unsigned int len = 0 ; @@ -351,88 +366,103 @@ int main (int argc, char const *const *argv) genalloc_free(s6dns_domain_t, &data[0].ds) ; s[len] = 0 ; if (!env_addmodif(&modifs, tcplocalhost, s)) dienomem() ; + gotname |= 1 ; } - } - if (!remotelen && !blob[1].status) - { - if (genalloc_len(s6dns_domain_t, &data[1].ds)) + if (!(gotname & 2) && !blob[1].status) { - s6dns_domain_noqualify(genalloc_s(s6dns_domain_t, &data[1].ds)) ; - remotelen = s6dns_domain_tostring(remotebuf, 255, genalloc_s(s6dns_domain_t, &data[1].ds)) ; - } - remotebuf[remotelen] = 0 ; - if (flagparanoid) - { - int r ; - data[1].ds.len = 0 ; - r = ip46_is6(&remoteip) ? s6dns_resolve_aaaa_g(&data[1].ds, remotebuf, remotelen, 0, &deadline) : s6dns_resolve_a_g(&data[1].ds, remotebuf, remotelen, 0, &deadline) ; - if (r <= 0) + char s[256] ; + unsigned int len = 0 ; + if (genalloc_len(s6dns_domain_t, &data[1].ds)) + { + s6dns_domain_noqualify(genalloc_s(s6dns_domain_t, &data[1].ds)) ; + len = s6dns_domain_tostring(s, 255, genalloc_s(s6dns_domain_t, &data[1].ds)) ; + } + s[len] = 0 ; + + if (wgolb & GOLB_PARANOID) { - if (verbosity >= 3) strerr_warnwu("(paranoidly) resolve ", remotebuf, ": ", s6dns_constants_error_str(errno)) ; - if (flagfatal) + int r ; + data[1].ds.len = 0 ; + r = ip46_is6(&remoteip) ? s6dns_resolve_aaaa_g(&data[1].ds, s, len, 0, &deadline) : s6dns_resolve_a_g(&data[1].ds, s, len, 0, &deadline) ; + if (r <= 0) { - e = errno == ETIMEDOUT ? 99 : errno == ENOENT ? 1 : 111 ; - goto reject ; + if (wgolb & GOLB_FATAL) + { + e = errno == ETIMEDOUT ? 99 : errno == ENOENT ? 1 : 111 ; + if (verbosity >= 3) strerr_warnfu("(paranoidly) resolve ", s, ": ", s6dns_constants_error_str(errno)) ; + goto reject ; + } + if (verbosity >= 3) strerr_warnwu("(paranoidly) resolve ", s, ": ", s6dns_constants_error_str(errno)) ; + } + else + { + size_t i = 0 ; + for (; i < data[1].ds.len ; i += ip46_is6(&remoteip) ? 16 : 4) + if (!memcmp(remoteip.ip, data[1].ds.s + i, ip46_is6(&remoteip) ? 16 : 4)) break ; + if (i >= data[1].ds.len) + { + e = 1 ; + if (verbosity >= 3) strerr_warnf("paranoid IP verification", " rejected available IPs") ; + goto reject ; + } } - remotelen = 0 ; } - else + + if (!env_addmodif(&modifs, tcpremotehost, s)) dienomem() ; + gotname |= 2 ; + + if (accepted == S6_ACCESSRULES_NOTFOUND) { - size_t i = 0 ; - for (; i < data[1].ds.len ; i += ip46_is6(&remoteip) ? 16 : 4) - if (!memcmp(remoteip.ip, data[1].ds.s + i, ip46_is6(&remoteip) ? 16 : 4)) break ; - if (i >= data[1].ds.len) remotelen = 0 ; + if (wgola[GOLA_RULESDIR]) + accepted = s6_accessrules_reversedns_fs(s, wgola[GOLA_RULESDIR], ¶ms) ; + else if (wgola[GOLA_RULESFILE]) + { + accepted = s6_accessrules_reversedns_cdb(s, &c, ¶ms) ; + cdb_free(&c) ; + } + switch (accepted) + { + case S6_ACCESSRULES_ERROR : + strerr_diefusys(111, "check ruleset for ", "reverse DNS", " in ", wgola[GOLA_RULESDIR] ? wgola[GOLA_RULESDIR] : wgola[GOLA_RULESFILE]) ; + case S6_ACCESSRULES_ALLOW : break ; + case S6_ACCESSRULES_NOTFOUND : + case S6_ACCESSRULES_DENY : e = 1 ; goto reject ; + default : X() ; + } } } - stralloc_free(&data[1].ds) ; - } - else if (!remotelen && flagparanoid) - { - if (verbosity >= 3) strerr_warnwu("(paranoidly) resolve PTR for client address", ": ", s6dns_constants_error_str(blob[1].status)) ; - if (flagfatal) - { - e = errno == ETIMEDOUT ? 99 : errno == ENOENT ? 1 : 111 ; - goto reject ; - } } } - if (!env_addmodif(&modifs, tcpremotehost, remotelen ? remotebuf : 0)) dienomem() ; + if (!(gotname & 1)) + { + if (!env_addmodif(&modifs, tcplocalhost, 0)) dienomem() ; + } - if (remotelen && (accepted == S6_ACCESSRULES_NOTFOUND)) + if (!(gotname & 2)) { - switch (rulestype) + if (wgolb & GOLB_PARANOID) { - case 1 : - accepted = s6_accessrules_reversedns_fs(remotebuf, (void *)rules, ¶ms) ; - break ; - case 2 : - accepted = s6_accessrules_reversedns_cdb(remotebuf, &c, ¶ms) ; - break ; - default : X() ; + if (verbosity >= 3) strerr_warnfu("get a valid remote host name for ", "paranoid IP verification") ; + e = 1 ; + goto reject ; } + if (!env_addmodif(&modifs, tcpremotehost, 0)) dienomem() ; } + } - if ((rulestype == 2) && (accepted != S6_ACCESSRULES_ALLOW)) cdb_free(&c) ; + afterdns: - switch (accepted) - { - case S6_ACCESSRULES_ERROR : - strerr_diefu6sys(111, "check ", rulestypestr[rulestype], " ruleset for ", "reverse DNS", " in ", rules) ; - case S6_ACCESSRULES_ALLOW : break ; - case S6_ACCESSRULES_DENY : - if (verbosity >= 2) log_deny(getpid(), &remoteip) ; - return 1 ; - case S6_ACCESSRULES_NOTFOUND : - if (verbosity >= 2) log_deny(getpid(), &remoteip) ; - return 1 ; - default : X() ; - } + if (accepted != S6_ACCESSRULES_ALLOW) + { + e = 1 ; + if (verbosity >= 3) strerr_warnf("inconclusive access control result") ; + goto reject ; } if (!stralloc_catb(¶ms.env, modifs.s, modifs.len)) dienomem() ; - stralloc_free(&modifs) ; - if (verbosity) log_accept(getpid(), &remoteip) ; + if (verbosity) log_accept(&remoteip) ; + if (params.exec.len) #ifdef S6_NETWORKING_USE_EXECLINE { @@ -440,12 +470,12 @@ int main (int argc, char const *const *argv) xmexec_m((char const *const *)specialargv, params.env.s, params.env.len) ; } #else - strerr_warnw1x("exec file found but ignored because s6-networking was compiled without execline support!") ; + strerr_warnw("exec file found but ignored because s6-networking was compiled without execline support!") ; #endif xmexec_m(argv, params.env.s, params.env.len) ; reject: - if (verbosity >= 2) log_deny(getpid(), &remoteip) ; - return e ; + if (verbosity >= 2) log_deny(&remoteip) ; + _exit(e) ; } |