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authordjm <>2012-10-13 21:25:14 +0000
committerdjm <>2012-10-13 21:25:14 +0000
commit93723b50b639d8dc717bc1bf463fd46e1b321239 (patch)
tree281e0a29ae8f87a8c47fbd4deaa1f3d48b8cc5c1 /src/lib/libcrypto/bio/bss_dgram.c
parent65e72ac55a6405783db7a12d7e35a7561d46005b (diff)
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Diffstat (limited to 'src/lib/libcrypto/bio/bss_dgram.c')
-rw-r--r--src/lib/libcrypto/bio/bss_dgram.c996
1 files changed, 996 insertions, 0 deletions
diff --git a/src/lib/libcrypto/bio/bss_dgram.c b/src/lib/libcrypto/bio/bss_dgram.c
index 71ebe987b6..1b1e4bec81 100644
--- a/src/lib/libcrypto/bio/bss_dgram.c
+++ b/src/lib/libcrypto/bio/bss_dgram.c
@@ -70,6 +70,13 @@
70#include <sys/timeb.h> 70#include <sys/timeb.h>
71#endif 71#endif
72 72
73#ifndef OPENSSL_NO_SCTP
74#include <netinet/sctp.h>
75#include <fcntl.h>
76#define OPENSSL_SCTP_DATA_CHUNK_TYPE 0x00
77#define OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE 0xc0
78#endif
79
73#ifdef OPENSSL_SYS_LINUX 80#ifdef OPENSSL_SYS_LINUX
74#define IP_MTU 14 /* linux is lame */ 81#define IP_MTU 14 /* linux is lame */
75#endif 82#endif
@@ -88,6 +95,18 @@ static int dgram_new(BIO *h);
88static int dgram_free(BIO *data); 95static int dgram_free(BIO *data);
89static int dgram_clear(BIO *bio); 96static int dgram_clear(BIO *bio);
90 97
98#ifndef OPENSSL_NO_SCTP
99static int dgram_sctp_write(BIO *h, const char *buf, int num);
100static int dgram_sctp_read(BIO *h, char *buf, int size);
101static int dgram_sctp_puts(BIO *h, const char *str);
102static long dgram_sctp_ctrl(BIO *h, int cmd, long arg1, void *arg2);
103static int dgram_sctp_new(BIO *h);
104static int dgram_sctp_free(BIO *data);
105#ifdef SCTP_AUTHENTICATION_EVENT
106static void dgram_sctp_handle_auth_free_key_event(BIO *b, union sctp_notification *snp);
107#endif
108#endif
109
91static int BIO_dgram_should_retry(int s); 110static int BIO_dgram_should_retry(int s);
92 111
93static void get_current_time(struct timeval *t); 112static void get_current_time(struct timeval *t);
@@ -106,6 +125,22 @@ static BIO_METHOD methods_dgramp=
106 NULL, 125 NULL,
107 }; 126 };
108 127
128#ifndef OPENSSL_NO_SCTP
129static BIO_METHOD methods_dgramp_sctp=
130 {
131 BIO_TYPE_DGRAM_SCTP,
132 "datagram sctp socket",
133 dgram_sctp_write,
134 dgram_sctp_read,
135 dgram_sctp_puts,
136 NULL, /* dgram_gets, */
137 dgram_sctp_ctrl,
138 dgram_sctp_new,
139 dgram_sctp_free,
140 NULL,
141 };
142#endif
143
109typedef struct bio_dgram_data_st 144typedef struct bio_dgram_data_st
110 { 145 {
111 union { 146 union {
@@ -122,6 +157,40 @@ typedef struct bio_dgram_data_st
122 struct timeval socket_timeout; 157 struct timeval socket_timeout;
123 } bio_dgram_data; 158 } bio_dgram_data;
124 159
160#ifndef OPENSSL_NO_SCTP
161typedef struct bio_dgram_sctp_save_message_st
162 {
163 BIO *bio;
164 char *data;
165 int length;
166 } bio_dgram_sctp_save_message;
167
168typedef struct bio_dgram_sctp_data_st
169 {
170 union {
171 struct sockaddr sa;
172 struct sockaddr_in sa_in;
173#if OPENSSL_USE_IPV6
174 struct sockaddr_in6 sa_in6;
175#endif
176 } peer;
177 unsigned int connected;
178 unsigned int _errno;
179 unsigned int mtu;
180 struct bio_dgram_sctp_sndinfo sndinfo;
181 struct bio_dgram_sctp_rcvinfo rcvinfo;
182 struct bio_dgram_sctp_prinfo prinfo;
183 void (*handle_notifications)(BIO *bio, void *context, void *buf);
184 void* notification_context;
185 int in_handshake;
186 int ccs_rcvd;
187 int ccs_sent;
188 int save_shutdown;
189 int peer_auth_tested;
190 bio_dgram_sctp_save_message saved_message;
191 } bio_dgram_sctp_data;
192#endif
193
125BIO_METHOD *BIO_s_datagram(void) 194BIO_METHOD *BIO_s_datagram(void)
126 { 195 {
127 return(&methods_dgramp); 196 return(&methods_dgramp);
@@ -547,6 +616,27 @@ static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
547 ret = 0; 616 ret = 0;
548#endif 617#endif
549 break; 618 break;
619 case BIO_CTRL_DGRAM_GET_FALLBACK_MTU:
620 switch (data->peer.sa.sa_family)
621 {
622 case AF_INET:
623 ret = 576 - 20 - 8;
624 break;
625#if OPENSSL_USE_IPV6
626 case AF_INET6:
627#ifdef IN6_IS_ADDR_V4MAPPED
628 if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
629 ret = 576 - 20 - 8;
630 else
631#endif
632 ret = 1280 - 40 - 8;
633 break;
634#endif
635 default:
636 ret = 576 - 20 - 8;
637 break;
638 }
639 break;
550 case BIO_CTRL_DGRAM_GET_MTU: 640 case BIO_CTRL_DGRAM_GET_MTU:
551 return data->mtu; 641 return data->mtu;
552 break; 642 break;
@@ -738,6 +828,912 @@ static int dgram_puts(BIO *bp, const char *str)
738 return(ret); 828 return(ret);
739 } 829 }
740 830
831#ifndef OPENSSL_NO_SCTP
832BIO_METHOD *BIO_s_datagram_sctp(void)
833 {
834 return(&methods_dgramp_sctp);
835 }
836
837BIO *BIO_new_dgram_sctp(int fd, int close_flag)
838 {
839 BIO *bio;
840 int ret, optval = 20000;
841 int auth_data = 0, auth_forward = 0;
842 unsigned char *p;
843 struct sctp_authchunk auth;
844 struct sctp_authchunks *authchunks;
845 socklen_t sockopt_len;
846#ifdef SCTP_AUTHENTICATION_EVENT
847#ifdef SCTP_EVENT
848 struct sctp_event event;
849#else
850 struct sctp_event_subscribe event;
851#endif
852#endif
853
854 bio=BIO_new(BIO_s_datagram_sctp());
855 if (bio == NULL) return(NULL);
856 BIO_set_fd(bio,fd,close_flag);
857
858 /* Activate SCTP-AUTH for DATA and FORWARD-TSN chunks */
859 auth.sauth_chunk = OPENSSL_SCTP_DATA_CHUNK_TYPE;
860 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth, sizeof(struct sctp_authchunk));
861 OPENSSL_assert(ret >= 0);
862 auth.sauth_chunk = OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE;
863 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth, sizeof(struct sctp_authchunk));
864 OPENSSL_assert(ret >= 0);
865
866 /* Test if activation was successful. When using accept(),
867 * SCTP-AUTH has to be activated for the listening socket
868 * already, otherwise the connected socket won't use it. */
869 sockopt_len = (socklen_t)(sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
870 authchunks = OPENSSL_malloc(sockopt_len);
871 memset(authchunks, 0, sizeof(sockopt_len));
872 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_LOCAL_AUTH_CHUNKS, authchunks, &sockopt_len);
873 OPENSSL_assert(ret >= 0);
874
875 for (p = (unsigned char*) authchunks + sizeof(sctp_assoc_t);
876 p < (unsigned char*) authchunks + sockopt_len;
877 p += sizeof(uint8_t))
878 {
879 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE) auth_data = 1;
880 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE) auth_forward = 1;
881 }
882
883 OPENSSL_free(authchunks);
884
885 OPENSSL_assert(auth_data);
886 OPENSSL_assert(auth_forward);
887
888#ifdef SCTP_AUTHENTICATION_EVENT
889#ifdef SCTP_EVENT
890 memset(&event, 0, sizeof(struct sctp_event));
891 event.se_assoc_id = 0;
892 event.se_type = SCTP_AUTHENTICATION_EVENT;
893 event.se_on = 1;
894 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event));
895 OPENSSL_assert(ret >= 0);
896#else
897 sockopt_len = (socklen_t) sizeof(struct sctp_event_subscribe);
898 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, &sockopt_len);
899 OPENSSL_assert(ret >= 0);
900
901 event.sctp_authentication_event = 1;
902
903 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, sizeof(struct sctp_event_subscribe));
904 OPENSSL_assert(ret >= 0);
905#endif
906#endif
907
908 /* Disable partial delivery by setting the min size
909 * larger than the max record size of 2^14 + 2048 + 13
910 */
911 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT, &optval, sizeof(optval));
912 OPENSSL_assert(ret >= 0);
913
914 return(bio);
915 }
916
917int BIO_dgram_is_sctp(BIO *bio)
918 {
919 return (BIO_method_type(bio) == BIO_TYPE_DGRAM_SCTP);
920 }
921
922static int dgram_sctp_new(BIO *bi)
923 {
924 bio_dgram_sctp_data *data = NULL;
925
926 bi->init=0;
927 bi->num=0;
928 data = OPENSSL_malloc(sizeof(bio_dgram_sctp_data));
929 if (data == NULL)
930 return 0;
931 memset(data, 0x00, sizeof(bio_dgram_sctp_data));
932#ifdef SCTP_PR_SCTP_NONE
933 data->prinfo.pr_policy = SCTP_PR_SCTP_NONE;
934#endif
935 bi->ptr = data;
936
937 bi->flags=0;
938 return(1);
939 }
940
941static int dgram_sctp_free(BIO *a)
942 {
943 bio_dgram_sctp_data *data;
944
945 if (a == NULL) return(0);
946 if ( ! dgram_clear(a))
947 return 0;
948
949 data = (bio_dgram_sctp_data *)a->ptr;
950 if(data != NULL) OPENSSL_free(data);
951
952 return(1);
953 }
954
955#ifdef SCTP_AUTHENTICATION_EVENT
956void dgram_sctp_handle_auth_free_key_event(BIO *b, union sctp_notification *snp)
957 {
958 unsigned int sockopt_len = 0;
959 int ret;
960 struct sctp_authkey_event* authkeyevent = &snp->sn_auth_event;
961
962 if (authkeyevent->auth_indication == SCTP_AUTH_FREE_KEY)
963 {
964 struct sctp_authkeyid authkeyid;
965
966 /* delete key */
967 authkeyid.scact_keynumber = authkeyevent->auth_keynumber;
968 sockopt_len = sizeof(struct sctp_authkeyid);
969 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
970 &authkeyid, sockopt_len);
971 }
972 }
973#endif
974
975static int dgram_sctp_read(BIO *b, char *out, int outl)
976 {
977 int ret = 0, n = 0, i, optval;
978 socklen_t optlen;
979 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *)b->ptr;
980 union sctp_notification *snp;
981 struct msghdr msg;
982 struct iovec iov;
983 struct cmsghdr *cmsg;
984 char cmsgbuf[512];
985
986 if (out != NULL)
987 {
988 clear_socket_error();
989
990 do
991 {
992 memset(&data->rcvinfo, 0x00, sizeof(struct bio_dgram_sctp_rcvinfo));
993 iov.iov_base = out;
994 iov.iov_len = outl;
995 msg.msg_name = NULL;
996 msg.msg_namelen = 0;
997 msg.msg_iov = &iov;
998 msg.msg_iovlen = 1;
999 msg.msg_control = cmsgbuf;
1000 msg.msg_controllen = 512;
1001 msg.msg_flags = 0;
1002 n = recvmsg(b->num, &msg, 0);
1003
1004 if (msg.msg_controllen > 0)
1005 {
1006 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg))
1007 {
1008 if (cmsg->cmsg_level != IPPROTO_SCTP)
1009 continue;
1010#ifdef SCTP_RCVINFO
1011 if (cmsg->cmsg_type == SCTP_RCVINFO)
1012 {
1013 struct sctp_rcvinfo *rcvinfo;
1014
1015 rcvinfo = (struct sctp_rcvinfo *)CMSG_DATA(cmsg);
1016 data->rcvinfo.rcv_sid = rcvinfo->rcv_sid;
1017 data->rcvinfo.rcv_ssn = rcvinfo->rcv_ssn;
1018 data->rcvinfo.rcv_flags = rcvinfo->rcv_flags;
1019 data->rcvinfo.rcv_ppid = rcvinfo->rcv_ppid;
1020 data->rcvinfo.rcv_tsn = rcvinfo->rcv_tsn;
1021 data->rcvinfo.rcv_cumtsn = rcvinfo->rcv_cumtsn;
1022 data->rcvinfo.rcv_context = rcvinfo->rcv_context;
1023 }
1024#endif
1025#ifdef SCTP_SNDRCV
1026 if (cmsg->cmsg_type == SCTP_SNDRCV)
1027 {
1028 struct sctp_sndrcvinfo *sndrcvinfo;
1029
1030 sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1031 data->rcvinfo.rcv_sid = sndrcvinfo->sinfo_stream;
1032 data->rcvinfo.rcv_ssn = sndrcvinfo->sinfo_ssn;
1033 data->rcvinfo.rcv_flags = sndrcvinfo->sinfo_flags;
1034 data->rcvinfo.rcv_ppid = sndrcvinfo->sinfo_ppid;
1035 data->rcvinfo.rcv_tsn = sndrcvinfo->sinfo_tsn;
1036 data->rcvinfo.rcv_cumtsn = sndrcvinfo->sinfo_cumtsn;
1037 data->rcvinfo.rcv_context = sndrcvinfo->sinfo_context;
1038 }
1039#endif
1040 }
1041 }
1042
1043 if (n <= 0)
1044 {
1045 if (n < 0)
1046 ret = n;
1047 break;
1048 }
1049
1050 if (msg.msg_flags & MSG_NOTIFICATION)
1051 {
1052 snp = (union sctp_notification*) out;
1053 if (snp->sn_header.sn_type == SCTP_SENDER_DRY_EVENT)
1054 {
1055#ifdef SCTP_EVENT
1056 struct sctp_event event;
1057#else
1058 struct sctp_event_subscribe event;
1059 socklen_t eventsize;
1060#endif
1061 /* If a message has been delayed until the socket
1062 * is dry, it can be sent now.
1063 */
1064 if (data->saved_message.length > 0)
1065 {
1066 dgram_sctp_write(data->saved_message.bio, data->saved_message.data,
1067 data->saved_message.length);
1068 OPENSSL_free(data->saved_message.data);
1069 data->saved_message.length = 0;
1070 }
1071
1072 /* disable sender dry event */
1073#ifdef SCTP_EVENT
1074 memset(&event, 0, sizeof(struct sctp_event));
1075 event.se_assoc_id = 0;
1076 event.se_type = SCTP_SENDER_DRY_EVENT;
1077 event.se_on = 0;
1078 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event));
1079 OPENSSL_assert(i >= 0);
1080#else
1081 eventsize = sizeof(struct sctp_event_subscribe);
1082 i = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1083 OPENSSL_assert(i >= 0);
1084
1085 event.sctp_sender_dry_event = 0;
1086
1087 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, sizeof(struct sctp_event_subscribe));
1088 OPENSSL_assert(i >= 0);
1089#endif
1090 }
1091
1092#ifdef SCTP_AUTHENTICATION_EVENT
1093 if (snp->sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1094 dgram_sctp_handle_auth_free_key_event(b, snp);
1095#endif
1096
1097 if (data->handle_notifications != NULL)
1098 data->handle_notifications(b, data->notification_context, (void*) out);
1099
1100 memset(out, 0, outl);
1101 }
1102 else
1103 ret += n;
1104 }
1105 while ((msg.msg_flags & MSG_NOTIFICATION) && (msg.msg_flags & MSG_EOR) && (ret < outl));
1106
1107 if (ret > 0 && !(msg.msg_flags & MSG_EOR))
1108 {
1109 /* Partial message read, this should never happen! */
1110
1111 /* The buffer was too small, this means the peer sent
1112 * a message that was larger than allowed. */
1113 if (ret == outl)
1114 return -1;
1115
1116 /* Test if socket buffer can handle max record
1117 * size (2^14 + 2048 + 13)
1118 */
1119 optlen = (socklen_t) sizeof(int);
1120 ret = getsockopt(b->num, SOL_SOCKET, SO_RCVBUF, &optval, &optlen);
1121 OPENSSL_assert(ret >= 0);
1122 OPENSSL_assert(optval >= 18445);
1123
1124 /* Test if SCTP doesn't partially deliver below
1125 * max record size (2^14 + 2048 + 13)
1126 */
1127 optlen = (socklen_t) sizeof(int);
1128 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT,
1129 &optval, &optlen);
1130 OPENSSL_assert(ret >= 0);
1131 OPENSSL_assert(optval >= 18445);
1132
1133 /* Partially delivered notification??? Probably a bug.... */
1134 OPENSSL_assert(!(msg.msg_flags & MSG_NOTIFICATION));
1135
1136 /* Everything seems ok till now, so it's most likely
1137 * a message dropped by PR-SCTP.
1138 */
1139 memset(out, 0, outl);
1140 BIO_set_retry_read(b);
1141 return -1;
1142 }
1143
1144 BIO_clear_retry_flags(b);
1145 if (ret < 0)
1146 {
1147 if (BIO_dgram_should_retry(ret))
1148 {
1149 BIO_set_retry_read(b);
1150 data->_errno = get_last_socket_error();
1151 }
1152 }
1153
1154 /* Test if peer uses SCTP-AUTH before continuing */
1155 if (!data->peer_auth_tested)
1156 {
1157 int ii, auth_data = 0, auth_forward = 0;
1158 unsigned char *p;
1159 struct sctp_authchunks *authchunks;
1160
1161 optlen = (socklen_t)(sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
1162 authchunks = OPENSSL_malloc(optlen);
1163 memset(authchunks, 0, sizeof(optlen));
1164 ii = getsockopt(b->num, IPPROTO_SCTP, SCTP_PEER_AUTH_CHUNKS, authchunks, &optlen);
1165 OPENSSL_assert(ii >= 0);
1166
1167 for (p = (unsigned char*) authchunks + sizeof(sctp_assoc_t);
1168 p < (unsigned char*) authchunks + optlen;
1169 p += sizeof(uint8_t))
1170 {
1171 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE) auth_data = 1;
1172 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE) auth_forward = 1;
1173 }
1174
1175 OPENSSL_free(authchunks);
1176
1177 if (!auth_data || !auth_forward)
1178 {
1179 BIOerr(BIO_F_DGRAM_SCTP_READ,BIO_R_CONNECT_ERROR);
1180 return -1;
1181 }
1182
1183 data->peer_auth_tested = 1;
1184 }
1185 }
1186 return(ret);
1187 }
1188
1189static int dgram_sctp_write(BIO *b, const char *in, int inl)
1190 {
1191 int ret;
1192 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *)b->ptr;
1193 struct bio_dgram_sctp_sndinfo *sinfo = &(data->sndinfo);
1194 struct bio_dgram_sctp_prinfo *pinfo = &(data->prinfo);
1195 struct bio_dgram_sctp_sndinfo handshake_sinfo;
1196 struct iovec iov[1];
1197 struct msghdr msg;
1198 struct cmsghdr *cmsg;
1199#if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1200 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo)) + CMSG_SPACE(sizeof(struct sctp_prinfo))];
1201 struct sctp_sndinfo *sndinfo;
1202 struct sctp_prinfo *prinfo;
1203#else
1204 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))];
1205 struct sctp_sndrcvinfo *sndrcvinfo;
1206#endif
1207
1208 clear_socket_error();
1209
1210 /* If we're send anything else than application data,
1211 * disable all user parameters and flags.
1212 */
1213 if (in[0] != 23) {
1214 memset(&handshake_sinfo, 0x00, sizeof(struct bio_dgram_sctp_sndinfo));
1215#ifdef SCTP_SACK_IMMEDIATELY
1216 handshake_sinfo.snd_flags = SCTP_SACK_IMMEDIATELY;
1217#endif
1218 sinfo = &handshake_sinfo;
1219 }
1220
1221 /* If we have to send a shutdown alert message and the
1222 * socket is not dry yet, we have to save it and send it
1223 * as soon as the socket gets dry.
1224 */
1225 if (data->save_shutdown && !BIO_dgram_sctp_wait_for_dry(b))
1226 {
1227 data->saved_message.bio = b;
1228 data->saved_message.length = inl;
1229 data->saved_message.data = OPENSSL_malloc(inl);
1230 memcpy(data->saved_message.data, in, inl);
1231 return inl;
1232 }
1233
1234 iov[0].iov_base = (char *)in;
1235 iov[0].iov_len = inl;
1236 msg.msg_name = NULL;
1237 msg.msg_namelen = 0;
1238 msg.msg_iov = iov;
1239 msg.msg_iovlen = 1;
1240 msg.msg_control = (caddr_t)cmsgbuf;
1241 msg.msg_controllen = 0;
1242 msg.msg_flags = 0;
1243#if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1244 cmsg = (struct cmsghdr *)cmsgbuf;
1245 cmsg->cmsg_level = IPPROTO_SCTP;
1246 cmsg->cmsg_type = SCTP_SNDINFO;
1247 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndinfo));
1248 sndinfo = (struct sctp_sndinfo *)CMSG_DATA(cmsg);
1249 memset(sndinfo, 0, sizeof(struct sctp_sndinfo));
1250 sndinfo->snd_sid = sinfo->snd_sid;
1251 sndinfo->snd_flags = sinfo->snd_flags;
1252 sndinfo->snd_ppid = sinfo->snd_ppid;
1253 sndinfo->snd_context = sinfo->snd_context;
1254 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndinfo));
1255
1256 cmsg = (struct cmsghdr *)&cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo))];
1257 cmsg->cmsg_level = IPPROTO_SCTP;
1258 cmsg->cmsg_type = SCTP_PRINFO;
1259 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_prinfo));
1260 prinfo = (struct sctp_prinfo *)CMSG_DATA(cmsg);
1261 memset(prinfo, 0, sizeof(struct sctp_prinfo));
1262 prinfo->pr_policy = pinfo->pr_policy;
1263 prinfo->pr_value = pinfo->pr_value;
1264 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_prinfo));
1265#else
1266 cmsg = (struct cmsghdr *)cmsgbuf;
1267 cmsg->cmsg_level = IPPROTO_SCTP;
1268 cmsg->cmsg_type = SCTP_SNDRCV;
1269 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo));
1270 sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1271 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
1272 sndrcvinfo->sinfo_stream = sinfo->snd_sid;
1273 sndrcvinfo->sinfo_flags = sinfo->snd_flags;
1274#ifdef __FreeBSD__
1275 sndrcvinfo->sinfo_flags |= pinfo->pr_policy;
1276#endif
1277 sndrcvinfo->sinfo_ppid = sinfo->snd_ppid;
1278 sndrcvinfo->sinfo_context = sinfo->snd_context;
1279 sndrcvinfo->sinfo_timetolive = pinfo->pr_value;
1280 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndrcvinfo));
1281#endif
1282
1283 ret = sendmsg(b->num, &msg, 0);
1284
1285 BIO_clear_retry_flags(b);
1286 if (ret <= 0)
1287 {
1288 if (BIO_dgram_should_retry(ret))
1289 {
1290 BIO_set_retry_write(b);
1291 data->_errno = get_last_socket_error();
1292 }
1293 }
1294 return(ret);
1295 }
1296
1297static long dgram_sctp_ctrl(BIO *b, int cmd, long num, void *ptr)
1298 {
1299 long ret=1;
1300 bio_dgram_sctp_data *data = NULL;
1301 unsigned int sockopt_len = 0;
1302 struct sctp_authkeyid authkeyid;
1303 struct sctp_authkey *authkey;
1304
1305 data = (bio_dgram_sctp_data *)b->ptr;
1306
1307 switch (cmd)
1308 {
1309 case BIO_CTRL_DGRAM_QUERY_MTU:
1310 /* Set to maximum (2^14)
1311 * and ignore user input to enable transport
1312 * protocol fragmentation.
1313 * Returns always 2^14.
1314 */
1315 data->mtu = 16384;
1316 ret = data->mtu;
1317 break;
1318 case BIO_CTRL_DGRAM_SET_MTU:
1319 /* Set to maximum (2^14)
1320 * and ignore input to enable transport
1321 * protocol fragmentation.
1322 * Returns always 2^14.
1323 */
1324 data->mtu = 16384;
1325 ret = data->mtu;
1326 break;
1327 case BIO_CTRL_DGRAM_SET_CONNECTED:
1328 case BIO_CTRL_DGRAM_CONNECT:
1329 /* Returns always -1. */
1330 ret = -1;
1331 break;
1332 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
1333 /* SCTP doesn't need the DTLS timer
1334 * Returns always 1.
1335 */
1336 break;
1337 case BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE:
1338 if (num > 0)
1339 data->in_handshake = 1;
1340 else
1341 data->in_handshake = 0;
1342
1343 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_NODELAY, &data->in_handshake, sizeof(int));
1344 break;
1345 case BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY:
1346 /* New shared key for SCTP AUTH.
1347 * Returns 0 on success, -1 otherwise.
1348 */
1349
1350 /* Get active key */
1351 sockopt_len = sizeof(struct sctp_authkeyid);
1352 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid, &sockopt_len);
1353 if (ret < 0) break;
1354
1355 /* Add new key */
1356 sockopt_len = sizeof(struct sctp_authkey) + 64 * sizeof(uint8_t);
1357 authkey = OPENSSL_malloc(sockopt_len);
1358 memset(authkey, 0x00, sockopt_len);
1359 authkey->sca_keynumber = authkeyid.scact_keynumber + 1;
1360#ifndef __FreeBSD__
1361 /* This field is missing in FreeBSD 8.2 and earlier,
1362 * and FreeBSD 8.3 and higher work without it.
1363 */
1364 authkey->sca_keylength = 64;
1365#endif
1366 memcpy(&authkey->sca_key[0], ptr, 64 * sizeof(uint8_t));
1367
1368 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_KEY, authkey, sockopt_len);
1369 if (ret < 0) break;
1370
1371 /* Reset active key */
1372 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1373 &authkeyid, sizeof(struct sctp_authkeyid));
1374 if (ret < 0) break;
1375
1376 break;
1377 case BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY:
1378 /* Returns 0 on success, -1 otherwise. */
1379
1380 /* Get active key */
1381 sockopt_len = sizeof(struct sctp_authkeyid);
1382 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid, &sockopt_len);
1383 if (ret < 0) break;
1384
1385 /* Set active key */
1386 authkeyid.scact_keynumber = authkeyid.scact_keynumber + 1;
1387 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1388 &authkeyid, sizeof(struct sctp_authkeyid));
1389 if (ret < 0) break;
1390
1391 /* CCS has been sent, so remember that and fall through
1392 * to check if we need to deactivate an old key
1393 */
1394 data->ccs_sent = 1;
1395
1396 case BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD:
1397 /* Returns 0 on success, -1 otherwise. */
1398
1399 /* Has this command really been called or is this just a fall-through? */
1400 if (cmd == BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD)
1401 data->ccs_rcvd = 1;
1402
1403 /* CSS has been both, received and sent, so deactivate an old key */
1404 if (data->ccs_rcvd == 1 && data->ccs_sent == 1)
1405 {
1406 /* Get active key */
1407 sockopt_len = sizeof(struct sctp_authkeyid);
1408 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid, &sockopt_len);
1409 if (ret < 0) break;
1410
1411 /* Deactivate key or delete second last key if
1412 * SCTP_AUTHENTICATION_EVENT is not available.
1413 */
1414 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1415#ifdef SCTP_AUTH_DEACTIVATE_KEY
1416 sockopt_len = sizeof(struct sctp_authkeyid);
1417 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DEACTIVATE_KEY,
1418 &authkeyid, sockopt_len);
1419 if (ret < 0) break;
1420#endif
1421#ifndef SCTP_AUTHENTICATION_EVENT
1422 if (authkeyid.scact_keynumber > 0)
1423 {
1424 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1425 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1426 &authkeyid, sizeof(struct sctp_authkeyid));
1427 if (ret < 0) break;
1428 }
1429#endif
1430
1431 data->ccs_rcvd = 0;
1432 data->ccs_sent = 0;
1433 }
1434 break;
1435 case BIO_CTRL_DGRAM_SCTP_GET_SNDINFO:
1436 /* Returns the size of the copied struct. */
1437 if (num > (long) sizeof(struct bio_dgram_sctp_sndinfo))
1438 num = sizeof(struct bio_dgram_sctp_sndinfo);
1439
1440 memcpy(ptr, &(data->sndinfo), num);
1441 ret = num;
1442 break;
1443 case BIO_CTRL_DGRAM_SCTP_SET_SNDINFO:
1444 /* Returns the size of the copied struct. */
1445 if (num > (long) sizeof(struct bio_dgram_sctp_sndinfo))
1446 num = sizeof(struct bio_dgram_sctp_sndinfo);
1447
1448 memcpy(&(data->sndinfo), ptr, num);
1449 break;
1450 case BIO_CTRL_DGRAM_SCTP_GET_RCVINFO:
1451 /* Returns the size of the copied struct. */
1452 if (num > (long) sizeof(struct bio_dgram_sctp_rcvinfo))
1453 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1454
1455 memcpy(ptr, &data->rcvinfo, num);
1456
1457 ret = num;
1458 break;
1459 case BIO_CTRL_DGRAM_SCTP_SET_RCVINFO:
1460 /* Returns the size of the copied struct. */
1461 if (num > (long) sizeof(struct bio_dgram_sctp_rcvinfo))
1462 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1463
1464 memcpy(&(data->rcvinfo), ptr, num);
1465 break;
1466 case BIO_CTRL_DGRAM_SCTP_GET_PRINFO:
1467 /* Returns the size of the copied struct. */
1468 if (num > (long) sizeof(struct bio_dgram_sctp_prinfo))
1469 num = sizeof(struct bio_dgram_sctp_prinfo);
1470
1471 memcpy(ptr, &(data->prinfo), num);
1472 ret = num;
1473 break;
1474 case BIO_CTRL_DGRAM_SCTP_SET_PRINFO:
1475 /* Returns the size of the copied struct. */
1476 if (num > (long) sizeof(struct bio_dgram_sctp_prinfo))
1477 num = sizeof(struct bio_dgram_sctp_prinfo);
1478
1479 memcpy(&(data->prinfo), ptr, num);
1480 break;
1481 case BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN:
1482 /* Returns always 1. */
1483 if (num > 0)
1484 data->save_shutdown = 1;
1485 else
1486 data->save_shutdown = 0;
1487 break;
1488
1489 default:
1490 /* Pass to default ctrl function to
1491 * process SCTP unspecific commands
1492 */
1493 ret=dgram_ctrl(b, cmd, num, ptr);
1494 break;
1495 }
1496 return(ret);
1497 }
1498
1499int BIO_dgram_sctp_notification_cb(BIO *b,
1500 void (*handle_notifications)(BIO *bio, void *context, void *buf),
1501 void *context)
1502 {
1503 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1504
1505 if (handle_notifications != NULL)
1506 {
1507 data->handle_notifications = handle_notifications;
1508 data->notification_context = context;
1509 }
1510 else
1511 return -1;
1512
1513 return 0;
1514 }
1515
1516int BIO_dgram_sctp_wait_for_dry(BIO *b)
1517{
1518 int is_dry = 0;
1519 int n, sockflags, ret;
1520 union sctp_notification snp;
1521 struct msghdr msg;
1522 struct iovec iov;
1523#ifdef SCTP_EVENT
1524 struct sctp_event event;
1525#else
1526 struct sctp_event_subscribe event;
1527 socklen_t eventsize;
1528#endif
1529 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *)b->ptr;
1530
1531 /* set sender dry event */
1532#ifdef SCTP_EVENT
1533 memset(&event, 0, sizeof(struct sctp_event));
1534 event.se_assoc_id = 0;
1535 event.se_type = SCTP_SENDER_DRY_EVENT;
1536 event.se_on = 1;
1537 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event));
1538#else
1539 eventsize = sizeof(struct sctp_event_subscribe);
1540 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1541 if (ret < 0)
1542 return -1;
1543
1544 event.sctp_sender_dry_event = 1;
1545
1546 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, sizeof(struct sctp_event_subscribe));
1547#endif
1548 if (ret < 0)
1549 return -1;
1550
1551 /* peek for notification */
1552 memset(&snp, 0x00, sizeof(union sctp_notification));
1553 iov.iov_base = (char *)&snp;
1554 iov.iov_len = sizeof(union sctp_notification);
1555 msg.msg_name = NULL;
1556 msg.msg_namelen = 0;
1557 msg.msg_iov = &iov;
1558 msg.msg_iovlen = 1;
1559 msg.msg_control = NULL;
1560 msg.msg_controllen = 0;
1561 msg.msg_flags = 0;
1562
1563 n = recvmsg(b->num, &msg, MSG_PEEK);
1564 if (n <= 0)
1565 {
1566 if ((n < 0) && (get_last_socket_error() != EAGAIN) && (get_last_socket_error() != EWOULDBLOCK))
1567 return -1;
1568 else
1569 return 0;
1570 }
1571
1572 /* if we find a notification, process it and try again if necessary */
1573 while (msg.msg_flags & MSG_NOTIFICATION)
1574 {
1575 memset(&snp, 0x00, sizeof(union sctp_notification));
1576 iov.iov_base = (char *)&snp;
1577 iov.iov_len = sizeof(union sctp_notification);
1578 msg.msg_name = NULL;
1579 msg.msg_namelen = 0;
1580 msg.msg_iov = &iov;
1581 msg.msg_iovlen = 1;
1582 msg.msg_control = NULL;
1583 msg.msg_controllen = 0;
1584 msg.msg_flags = 0;
1585
1586 n = recvmsg(b->num, &msg, 0);
1587 if (n <= 0)
1588 {
1589 if ((n < 0) && (get_last_socket_error() != EAGAIN) && (get_last_socket_error() != EWOULDBLOCK))
1590 return -1;
1591 else
1592 return is_dry;
1593 }
1594
1595 if (snp.sn_header.sn_type == SCTP_SENDER_DRY_EVENT)
1596 {
1597 is_dry = 1;
1598
1599 /* disable sender dry event */
1600#ifdef SCTP_EVENT
1601 memset(&event, 0, sizeof(struct sctp_event));
1602 event.se_assoc_id = 0;
1603 event.se_type = SCTP_SENDER_DRY_EVENT;
1604 event.se_on = 0;
1605 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event));
1606#else
1607 eventsize = (socklen_t) sizeof(struct sctp_event_subscribe);
1608 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1609 if (ret < 0)
1610 return -1;
1611
1612 event.sctp_sender_dry_event = 0;
1613
1614 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, sizeof(struct sctp_event_subscribe));
1615#endif
1616 if (ret < 0)
1617 return -1;
1618 }
1619
1620#ifdef SCTP_AUTHENTICATION_EVENT
1621 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1622 dgram_sctp_handle_auth_free_key_event(b, &snp);
1623#endif
1624
1625 if (data->handle_notifications != NULL)
1626 data->handle_notifications(b, data->notification_context, (void*) &snp);
1627
1628 /* found notification, peek again */
1629 memset(&snp, 0x00, sizeof(union sctp_notification));
1630 iov.iov_base = (char *)&snp;
1631 iov.iov_len = sizeof(union sctp_notification);
1632 msg.msg_name = NULL;
1633 msg.msg_namelen = 0;
1634 msg.msg_iov = &iov;
1635 msg.msg_iovlen = 1;
1636 msg.msg_control = NULL;
1637 msg.msg_controllen = 0;
1638 msg.msg_flags = 0;
1639
1640 /* if we have seen the dry already, don't wait */
1641 if (is_dry)
1642 {
1643 sockflags = fcntl(b->num, F_GETFL, 0);
1644 fcntl(b->num, F_SETFL, O_NONBLOCK);
1645 }
1646
1647 n = recvmsg(b->num, &msg, MSG_PEEK);
1648
1649 if (is_dry)
1650 {
1651 fcntl(b->num, F_SETFL, sockflags);
1652 }
1653
1654 if (n <= 0)
1655 {
1656 if ((n < 0) && (get_last_socket_error() != EAGAIN) && (get_last_socket_error() != EWOULDBLOCK))
1657 return -1;
1658 else
1659 return is_dry;
1660 }
1661 }
1662
1663 /* read anything else */
1664 return is_dry;
1665}
1666
1667int BIO_dgram_sctp_msg_waiting(BIO *b)
1668 {
1669 int n, sockflags;
1670 union sctp_notification snp;
1671 struct msghdr msg;
1672 struct iovec iov;
1673 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *)b->ptr;
1674
1675 /* Check if there are any messages waiting to be read */
1676 do
1677 {
1678 memset(&snp, 0x00, sizeof(union sctp_notification));
1679 iov.iov_base = (char *)&snp;
1680 iov.iov_len = sizeof(union sctp_notification);
1681 msg.msg_name = NULL;
1682 msg.msg_namelen = 0;
1683 msg.msg_iov = &iov;
1684 msg.msg_iovlen = 1;
1685 msg.msg_control = NULL;
1686 msg.msg_controllen = 0;
1687 msg.msg_flags = 0;
1688
1689 sockflags = fcntl(b->num, F_GETFL, 0);
1690 fcntl(b->num, F_SETFL, O_NONBLOCK);
1691 n = recvmsg(b->num, &msg, MSG_PEEK);
1692 fcntl(b->num, F_SETFL, sockflags);
1693
1694 /* if notification, process and try again */
1695 if (n > 0 && (msg.msg_flags & MSG_NOTIFICATION))
1696 {
1697#ifdef SCTP_AUTHENTICATION_EVENT
1698 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1699 dgram_sctp_handle_auth_free_key_event(b, &snp);
1700#endif
1701
1702 memset(&snp, 0x00, sizeof(union sctp_notification));
1703 iov.iov_base = (char *)&snp;
1704 iov.iov_len = sizeof(union sctp_notification);
1705 msg.msg_name = NULL;
1706 msg.msg_namelen = 0;
1707 msg.msg_iov = &iov;
1708 msg.msg_iovlen = 1;
1709 msg.msg_control = NULL;
1710 msg.msg_controllen = 0;
1711 msg.msg_flags = 0;
1712 n = recvmsg(b->num, &msg, 0);
1713
1714 if (data->handle_notifications != NULL)
1715 data->handle_notifications(b, data->notification_context, (void*) &snp);
1716 }
1717
1718 } while (n > 0 && (msg.msg_flags & MSG_NOTIFICATION));
1719
1720 /* Return 1 if there is a message to be read, return 0 otherwise. */
1721 if (n > 0)
1722 return 1;
1723 else
1724 return 0;
1725 }
1726
1727static int dgram_sctp_puts(BIO *bp, const char *str)
1728 {
1729 int n,ret;
1730
1731 n=strlen(str);
1732 ret=dgram_sctp_write(bp,str,n);
1733 return(ret);
1734 }
1735#endif
1736
741static int BIO_dgram_should_retry(int i) 1737static int BIO_dgram_should_retry(int i)
742 { 1738 {
743 int err; 1739 int err;
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-04-26 16:26:27 +0000