diff options
Diffstat (limited to 'libmailutils/server/acl.c')
-rw-r--r-- | libmailutils/server/acl.c | 366 |
1 files changed, 90 insertions, 276 deletions
diff --git a/libmailutils/server/acl.c b/libmailutils/server/acl.c index 0b7a507e0..ba1a4b86b 100644 --- a/libmailutils/server/acl.c +++ b/libmailutils/server/acl.c @@ -42,2 +42,10 @@ #include <mailutils/util.h> +#include <mailutils/sockaddr.h> +#include <mailutils/cidr.h> +#include <mailutils/stream.h> +#include <mailutils/stdstream.h> + +#ifndef MU_INADDR_BYTES +#define MU_INADDR_BYTES 16 +#endif @@ -47,5 +55,3 @@ struct _mu_acl_entry void *arg; - unsigned netmask; - int salen; - struct sockaddr sa[1]; + struct mu_cidr cidr; }; @@ -66,29 +72,2 @@ _destroy_acl_entry (void *item) -static size_t -mu_acl_entry_size (int salen) -{ - return sizeof (struct _mu_acl_entry) + salen - sizeof (struct sockaddr); -} - -static int -prepare_sa (struct sockaddr *sa) -{ - switch (sa->sa_family) - { - case AF_INET: - { - struct sockaddr_in *s_in = (struct sockaddr_in *)sa; - s_in->sin_addr.s_addr = ntohl (s_in->sin_addr.s_addr); - break; - } - - case AF_UNIX: - break; - - default: - return 1; - } - return 0; -} - int @@ -96,5 +75,5 @@ mu_acl_entry_create (struct _mu_acl_entry **pent, mu_acl_action_t action, void *data, - struct sockaddr *sa, int salen, unsigned long netmask) + struct mu_cidr *cidr) { - struct _mu_acl_entry *p = malloc (mu_acl_entry_size (salen)); + struct _mu_acl_entry *p = malloc (sizeof (*p)); if (!p) @@ -104,10 +83,4 @@ mu_acl_entry_create (struct _mu_acl_entry **pent, p->arg = data; - p->netmask = ntohl (netmask); - p->salen = salen; - memcpy (p->sa, sa, salen); - if (prepare_sa (p->sa)) - { - free (p); - return EINVAL; - } + memcpy (&p->cidr, cidr, sizeof (p->cidr)); + *pent = p; @@ -167,4 +140,3 @@ int mu_acl_append (mu_acl_t acl, mu_acl_action_t act, - void *data, struct sockaddr *sa, int salen, - unsigned long netmask) + void *data, struct mu_cidr *cidr) { @@ -175,3 +147,3 @@ mu_acl_append (mu_acl_t acl, mu_acl_action_t act, return EINVAL; - rc = mu_acl_entry_create (&ent, act, data, sa, salen, netmask); + rc = mu_acl_entry_create (&ent, act, data, cidr); if (rc) @@ -195,3 +167,3 @@ int mu_acl_prepend (mu_acl_t acl, mu_acl_action_t act, void *data, - struct sockaddr *sa, int salen, unsigned long netmask) + struct mu_cidr *cidr) { @@ -202,3 +174,3 @@ mu_acl_prepend (mu_acl_t acl, mu_acl_action_t act, void *data, return EINVAL; - rc = mu_acl_entry_create (&ent, act, data, sa, salen, netmask); + rc = mu_acl_entry_create (&ent, act, data, cidr); if (rc) @@ -221,4 +193,3 @@ int mu_acl_insert (mu_acl_t acl, size_t pos, int before, - mu_acl_action_t act, void *data, - struct sockaddr *sa, int salen, unsigned long netmask) + mu_acl_action_t act, void *data, struct mu_cidr *cidr) { @@ -238,3 +209,3 @@ mu_acl_insert (mu_acl_t acl, size_t pos, int before, } - rc = mu_acl_entry_create (&ent, act, data, sa, salen, netmask); + rc = mu_acl_entry_create (&ent, act, data, cidr); if (!ent) @@ -281,120 +252,15 @@ mu_acl_string_to_action (const char *str, mu_acl_action_t *pres) -#define MU_S_UN_NAME(sa, salen) \ - ((salen < mu_offsetof (struct sockaddr_un,sun_path)) ? "" : (sa)->sun_path) - -static void -debug_sockaddr (struct sockaddr *sa, int salen) -{ - switch (sa->sa_family) - { - case AF_INET: - { - struct sockaddr_in s_in = *(struct sockaddr_in *)sa; - s_in.sin_addr.s_addr = htonl (s_in.sin_addr.s_addr); - mu_debug_log_cont ("{AF_INET %s:%d}", - inet_ntoa (s_in.sin_addr), ntohs (s_in.sin_port)); - break; - } - - case AF_UNIX: - { - struct sockaddr_un *s_un = (struct sockaddr_un *)sa; - if (MU_S_UN_NAME(s_un, salen)[0] == 0) - mu_debug_log_cont ("{AF_UNIX}"); - else - mu_debug_log_cont ("{AF_UNIX %s}", s_un->sun_path); - break; - } - - default: - mu_debug_log_cont ("{Unsupported family: %d}", sa->sa_family); - } -} - -size_t -mu_stpcpy (char **pbuf, size_t *psize, const char *src) -{ - size_t slen = strlen (src); - if (pbuf == NULL || *pbuf == NULL) - return slen; - else - { - char *buf = *pbuf; - size_t size = *psize; - if (size > slen) - size = slen; - memcpy (buf, src, size); - *psize -= size; - *pbuf += size; - if (*psize) - **pbuf = 0; - else - (*pbuf)[-1] = 0; - return size; - } -} - -void -mu_sockaddr_to_str (const struct sockaddr *sa, int salen, - char *bufptr, size_t buflen, - size_t *plen) +struct run_closure { - char *nbuf; - size_t len = 0; - switch (sa->sa_family) - { - case AF_INET: - { - struct sockaddr_in s_in = *(struct sockaddr_in *)sa; - len += mu_stpcpy (&bufptr, &buflen, inet_ntoa (s_in.sin_addr)); - len += mu_stpcpy (&bufptr, &buflen, ":"); - if (mu_asprintf (&nbuf, "%hu", ntohs (s_in.sin_port)) == 0) - { - len += mu_stpcpy (&bufptr, &buflen, nbuf); - free (nbuf); - } - break; - } - - case AF_UNIX: - { - struct sockaddr_un *s_un = (struct sockaddr_un *)sa; - if (MU_S_UN_NAME(s_un, salen)[0] == 0) - len += mu_stpcpy (&bufptr, &buflen, "anonymous socket"); - else - { - len += mu_stpcpy (&bufptr, &buflen, "socket "); - len += mu_stpcpy (&bufptr, &buflen, s_un->sun_path); - } - break; - } - - default: - len += mu_stpcpy (&bufptr, &buflen, "{Unsupported family"); - if (mu_asprintf (&nbuf, ": %d", sa->sa_family) == 0) - { - len += mu_stpcpy (&bufptr, &buflen, nbuf); - free (nbuf); - } - len += mu_stpcpy (&bufptr, &buflen, "}"); - } - if (plen) - *plen = len + 1; -} + unsigned idx; + struct mu_cidr addr; -char * -mu_sockaddr_to_astr (const struct sockaddr *sa, int salen) -{ - size_t size; - char *p; - - mu_sockaddr_to_str (sa, salen, NULL, 0, &size); - p = malloc (size); - if (p) - mu_sockaddr_to_str (sa, salen, p, size, NULL); - return p; -} + char ipstr[40]; + char *addrstr; + char *numbuf; + mu_acl_result_t *result; +}; int -_acl_match (struct _mu_acl_entry *ent, struct sockaddr *sa, int salen) +_acl_match (struct _mu_acl_entry *ent, struct run_closure *rp) { @@ -406,14 +272,14 @@ _acl_match (struct _mu_acl_entry *ent, struct sockaddr *sa, int salen) { - struct in_addr a; - - mu_debug_log_begin ("Does "); - debug_sockaddr (sa, salen); - mu_debug_log_cont (" match "); - debug_sockaddr (ent->sa, salen); - a.s_addr = ent->netmask; - a.s_addr = htonl (a.s_addr); - mu_debug_log_cont (" netmask %s? ", inet_ntoa (a)); + char *s; + + if (ent->cidr.len == 0) + s = strdup ("any"); + mu_cidr_format (&ent->cidr, 0, &s); + if (!rp->addrstr) + mu_cidr_format (&rp->addr, MU_CIDR_FMT_ADDRONLY, &rp->addrstr); + mu_debug_log_begin ("Does %s match %s? ", s, rp->addrstr); + free (s); } - if (ent->sa->sa_family != sa->sa_family) + if (ent->cidr.len > 0 && mu_cidr_match (&ent->cidr, &rp->addr)) { @@ -422,42 +288,2 @@ _acl_match (struct _mu_acl_entry *ent, struct sockaddr *sa, int salen) } - - switch (ent->sa->sa_family) - { - case AF_INET: - { - struct sockaddr_in *sin_ent = (struct sockaddr_in *)ent->sa; - struct sockaddr_in *sin_item = (struct sockaddr_in *)sa; - - if (sin_ent->sin_addr.s_addr != - (sin_item->sin_addr.s_addr & ent->netmask)) - { - RESMATCH ("no (address differs)"); - return 1; - } - - if (sin_ent->sin_port && sin_item->sin_port - && sin_ent->sin_port != sin_item->sin_port) - { - RESMATCH ("no (port differs)"); - return 1; - } - break; - } - - case AF_UNIX: - { - struct sockaddr_un *sun_ent = (struct sockaddr_un *)ent->sa; - struct sockaddr_un *sun_item = (struct sockaddr_un *)sa; - - if (MU_S_UN_NAME (sun_ent, ent->salen)[0] - && MU_S_UN_NAME (sun_item, salen)[0] - && strcmp (sun_ent->sun_path, sun_item->sun_path)) - { - RESMATCH ("no"); - return 1; - } - break; - } - } - RESMATCH ("yes"); @@ -466,12 +292,2 @@ _acl_match (struct _mu_acl_entry *ent, struct sockaddr *sa, int salen) -struct run_closure -{ - unsigned idx; - struct sockaddr *sa; - char *numbuf; - char *portbuf; - int salen; - mu_acl_result_t *result; -}; - #define SEQ(s, n, l) \ @@ -491,36 +307,20 @@ acl_getvar (const char *name, size_t nlen, void *data) - switch (rp->sa->sa_family) + if (SEQ ("address", name, nlen)) { - case AF_INET: - { - struct sockaddr_in *s_in = (struct sockaddr_in *)rp->sa; - - if (SEQ ("address", name, nlen)) - { - struct in_addr addr = s_in->sin_addr; - addr.s_addr = htonl (addr.s_addr); - return inet_ntoa (addr); - } + if (!rp->addrstr) + mu_cidr_format (&rp->addr, MU_CIDR_FMT_ADDRONLY, &rp->addrstr); + return rp->addrstr; + } - if (SEQ ("port", name, nlen)) - { - if (!rp->portbuf && - mu_asprintf (&rp->portbuf, "%hu", ntohs (s_in->sin_port))) - return NULL; - return rp->portbuf; - } - break; - - case AF_UNIX: - if (SEQ ("address", name, nlen)) - { - struct sockaddr_un *s_un = (struct sockaddr_un *)rp->sa; - if (rp->salen == sizeof (s_un->sun_family)) - return NULL; - else - return s_un->sun_path; - } - } - break; +#if 0 + /* FIXME?: */ + if (SEQ ("port", name, nlen)) + { + if (!rp->portbuf && + mu_asprintf (&rp->portbuf, "%hu", ntohs (s_in->sin_port))) + return NULL; + return rp->portbuf; } +#endif + return NULL; @@ -537,3 +337,3 @@ expand_arg (const char *cmdline, struct run_closure *rp, char **s) env[0] = "family"; - switch (rp->sa->sa_family) + switch (rp->addr.family) { @@ -543,2 +343,8 @@ expand_arg (const char *cmdline, struct run_closure *rp, char **s) +#ifdef MAILUTILS_IPV6 + case AF_INET6: + env[1] = "AF_INET6"; + break; +#endif + case AF_UNIX: @@ -656,3 +462,3 @@ _run_entry (void *item, void *data) - if (_acl_match (ent, rp->sa, rp->salen) == 0) + if (_acl_match (ent, rp) == 0) { @@ -680,4 +486,6 @@ _run_entry (void *item, void *data) { - debug_sockaddr (rp->sa, rp->salen); - mu_debug_log_nl (); + if (!rp->addrstr) + mu_cidr_format (&rp->addr, MU_CIDR_FMT_ADDRONLY, + &rp->addrstr); + mu_diag_output (MU_DIAG_INFO, "%s", rp->addrstr); } @@ -714,3 +522,3 @@ _run_entry (void *item, void *data) if (mu_debug_level_p (MU_DEBCAT_ACL, MU_DEBUG_TRACE9)) - mu_debug_log_nl (); + mu_stream_flush (mu_strerr); @@ -723,2 +531,3 @@ mu_acl_check_sockaddr (mu_acl_t acl, const struct sockaddr *sa, int salen, { + int rc; struct run_closure r; @@ -728,12 +537,11 @@ mu_acl_check_sockaddr (mu_acl_t acl, const struct sockaddr *sa, int salen, - r.sa = malloc (salen); - if (!r.sa) - return ENOMEM; - memcpy (r.sa, sa, salen); - if (prepare_sa (r.sa)) + memset (&r, 0, sizeof (r)); + if (sa->sa_family == AF_UNIX) { - free (r.sa); - return EINVAL; + *pres = mu_acl_result_accept; + return 0; } - r.salen = salen; + rc = mu_cidr_from_sockaddr (&r.addr, sa); + if (rc) + return rc; @@ -741,4 +549,4 @@ mu_acl_check_sockaddr (mu_acl_t acl, const struct sockaddr *sa, int salen, { - mu_debug_log_begin ("Checking sockaddr "); - debug_sockaddr (r.sa, r.salen); + mu_cidr_format (&r.addr, MU_CIDR_FMT_ADDRONLY, &r.addrstr); + mu_debug_log_begin ("Checking sockaddr %s", r.addrstr); mu_debug_log_nl (); @@ -749,10 +557,9 @@ mu_acl_check_sockaddr (mu_acl_t acl, const struct sockaddr *sa, int salen, *r.result = mu_acl_result_undefined; - r.numbuf = r.portbuf = NULL; + r.numbuf = NULL; mu_list_do (acl->aclist, _run_entry, &r); free (r.numbuf); - free (r.portbuf); - free (r.sa); + free (r.addrstr); return 0; } - + int @@ -782,6 +589,13 @@ mu_acl_check_fd (mu_acl_t acl, int fd, mu_acl_result_t *pres) { - struct sockaddr_in cs; - socklen_t len = sizeof cs; + union + { + struct sockaddr sa; + struct sockaddr_in in; +#ifdef MAILUTILS_IPV6 + struct sockaddr_in6 in6; +#endif + } addr; + socklen_t len = sizeof addr; - if (getpeername (fd, (struct sockaddr *) &cs, &len) < 0) + if (getpeername (fd, &addr.sa, &len) < 0) { @@ -793,3 +607,3 @@ mu_acl_check_fd (mu_acl_t acl, int fd, mu_acl_result_t *pres) - return mu_acl_check_sockaddr (acl, (struct sockaddr *) &cs, len, pres); + return mu_acl_check_sockaddr (acl, &addr.sa, len, pres); } |