Bug Summary

File:src/lib/libcrypto/bio/b_sock.c
Warning:line 185, column 3
Value stored to 'bind_mode' is never read

Annotated Source Code

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clang -cc1 -cc1 -triple amd64-unknown-openbsd7.4 -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name b_sock.c -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 1 -pic-is-pie -mframe-pointer=all -relaxed-aliasing -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -target-feature +retpoline-indirect-calls -target-feature +retpoline-indirect-branches -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/usr/src/lib/libcrypto/obj -resource-dir /usr/local/llvm16/lib/clang/16 -D LIBRESSL_INTERNAL -D HAVE_FUNOPEN -I /usr/src/lib/libcrypto -I /usr/src/lib/libcrypto/arch/amd64 -I /usr/src/lib/libcrypto/asn1 -I /usr/src/lib/libcrypto/bio -I /usr/src/lib/libcrypto/bn -I /usr/src/lib/libcrypto/bn/arch/amd64 -I /usr/src/lib/libcrypto/bytestring -I /usr/src/lib/libcrypto/curve25519 -I /usr/src/lib/libcrypto/dh -I /usr/src/lib/libcrypto/dsa -I /usr/src/lib/libcrypto/ec -I /usr/src/lib/libcrypto/ecdsa -I /usr/src/lib/libcrypto/evp -I /usr/src/lib/libcrypto/hidden -I /usr/src/lib/libcrypto/hmac -I /usr/src/lib/libcrypto/kdf -I /usr/src/lib/libcrypto/modes -I /usr/src/lib/libcrypto/ocsp -I /usr/src/lib/libcrypto/pkcs12 -I /usr/src/lib/libcrypto/rsa -I /usr/src/lib/libcrypto/sha -I /usr/src/lib/libcrypto/ts -I /usr/src/lib/libcrypto/x509 -I /usr/src/lib/libcrypto/obj -D AES_ASM -D BSAES_ASM -D VPAES_ASM -D OPENSSL_IA32_SSE2 -D RSA_ASM -D OPENSSL_BN_ASM_MONT -D OPENSSL_BN_ASM_MONT5 -D MD5_ASM -D GHASH_ASM -D RC4_MD5_ASM -D SHA1_ASM -D SHA256_ASM -D SHA512_ASM -D WHIRLPOOL_ASM -D OPENSSL_CPUID_OBJ -internal-isystem /usr/local/llvm16/lib/clang/16/include -internal-externc-isystem /usr/include -O2 -fdebug-compilation-dir=/usr/src/lib/libcrypto/obj -ferror-limit 19 -fwrapv -D_RET_PROTECTOR -ret-protector -fcf-protection=branch -fno-jump-tables -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-valloc -fno-builtin-free -fno-builtin-strdup -fno-builtin-strndup -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /home/ben/Projects/scan/2024-01-11-140451-98009-1 -x c /usr/src/lib/libcrypto/bio/b_sock.c
1/* $OpenBSD: b_sock.c,v 1.71 2023/07/05 21:23:37 beck Exp $ */
2/*
3 * Copyright (c) 2017 Bob Beck <beck@openbsd.org>
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18#include <sys/ioctl.h>
19#include <sys/socket.h>
20#include <string.h>
21
22#include <arpa/inet.h>
23#include <netinet/in.h>
24#include <netinet/tcp.h>
25
26#include <errno(*__errno()).h>
27#include <limits.h>
28#include <netdb.h>
29#include <stdio.h>
30#include <stdlib.h>
31#include <unistd.h>
32
33#include <openssl/bio.h>
34#include <openssl/buffer.h>
35#include <openssl/err.h>
36
37int
38BIO_get_host_ip(const char *str, unsigned char *ip)
39{
40 struct addrinfo *res = NULL((void *)0);
41 struct addrinfo hints = {
42 .ai_family = AF_INET2,
43 .ai_socktype = SOCK_STREAM1,
44 .ai_flags = AI_PASSIVE1,
45 };
46 uint32_t *iap = (in_addr_t *)ip;
47 int error;
48
49 if (str == NULL((void *)0)) {
50 BIOerror(BIO_R_BAD_HOSTNAME_LOOKUP)ERR_put_error(32,(0xfff),(102),"/usr/src/lib/libcrypto/bio/b_sock.c"
,50);
51 ERR_asprintf_error_data("NULL host provided");
52 return (0);
53 }
54
55 if ((error = getaddrinfo(str, NULL((void *)0), &hints, &res)) != 0) {
56 BIOerror(BIO_R_BAD_HOSTNAME_LOOKUP)ERR_put_error(32,(0xfff),(102),"/usr/src/lib/libcrypto/bio/b_sock.c"
,56);
57 ERR_asprintf_error_data("getaddrinfo: host='%s' : %s'", str,
58 gai_strerror(error));
59 return (0);
60 }
61 *iap = (uint32_t)(((struct sockaddr_in *)(res->ai_addr))->sin_addr.s_addr);
62 freeaddrinfo(res);
63 return (1);
64}
65LCRYPTO_ALIAS(BIO_get_host_ip)asm("");
66
67int
68BIO_get_port(const char *str, unsigned short *port_ptr)
69{
70 struct addrinfo *res = NULL((void *)0);
71 struct addrinfo hints = {
72 .ai_family = AF_UNSPEC0,
73 .ai_socktype = SOCK_STREAM1,
74 .ai_flags = AI_PASSIVE1,
75 };
76 int error;
77
78 if (str == NULL((void *)0)) {
79 BIOerror(BIO_R_NO_PORT_SPECIFIED)ERR_put_error(32,(0xfff),(114),"/usr/src/lib/libcrypto/bio/b_sock.c"
,79);
80 return (0);
81 }
82
83 if ((error = getaddrinfo(NULL((void *)0), str, &hints, &res)) != 0) {
84 BIOerror(BIO_R_INVALID_ARGUMENT)ERR_put_error(32,(0xfff),(125),"/usr/src/lib/libcrypto/bio/b_sock.c"
,84);
85 ERR_asprintf_error_data("getaddrinfo: service='%s' : %s'", str,
86 gai_strerror(error));
87 return (0);
88 }
89 *port_ptr = ntohs(((struct sockaddr_in *)(res->ai_addr))->sin_port)(__uint16_t)(__builtin_constant_p(((struct sockaddr_in *)(res
->ai_addr))->sin_port) ? (__uint16_t)(((__uint16_t)(((struct
sockaddr_in *)(res->ai_addr))->sin_port) & 0xffU) <<
8 | ((__uint16_t)(((struct sockaddr_in *)(res->ai_addr))->
sin_port) & 0xff00U) >> 8) : __swap16md(((struct sockaddr_in
*)(res->ai_addr))->sin_port));
90 freeaddrinfo(res);
91 return (1);
92}
93LCRYPTO_ALIAS(BIO_get_port)asm("");
94
95int
96BIO_sock_error(int sock)
97{
98 socklen_t len;
99 int err;
100
101 len = sizeof(err);
102 if (getsockopt(sock, SOL_SOCKET0xffff, SO_ERROR0x1007, &err, &len) != 0)
103 return (1);
104 return (err);
105}
106LCRYPTO_ALIAS(BIO_sock_error)asm("");
107
108struct hostent *
109BIO_gethostbyname(const char *name)
110{
111 return gethostbyname(name);
112}
113LCRYPTO_ALIAS(BIO_gethostbyname)asm("");
114
115int
116BIO_socket_ioctl(int fd, long type, void *arg)
117{
118 int ret;
119
120 ret = ioctl(fd, type, arg);
121 if (ret < 0)
122 SYSerror(errno)ERR_put_error(2,(0xfff),((*__errno())),"/usr/src/lib/libcrypto/bio/b_sock.c"
,122);
123 return (ret);
124}
125LCRYPTO_ALIAS(BIO_socket_ioctl)asm("");
126
127int
128BIO_get_accept_socket(char *host, int bind_mode)
129{
130 struct addrinfo hints = {
131 .ai_family = AF_INET2,
132 .ai_socktype = SOCK_STREAM1,
133 .ai_flags = AI_PASSIVE1,
134 };
135 struct addrinfo *res = NULL((void *)0);
136 char *h, *p, *str = NULL((void *)0);
137 int error, ret = 0, s = -1;
138
139 if (host == NULL((void *)0)) {
140 BIOerror(BIO_R_NO_PORT_SPECIFIED)ERR_put_error(32,(0xfff),(114),"/usr/src/lib/libcrypto/bio/b_sock.c"
,140);
141 return (-1);
142 }
143 if ((str = strdup(host)) == NULL((void *)0)) {
144 BIOerror(ERR_R_MALLOC_FAILURE)ERR_put_error(32,(0xfff),((1|64)),"/usr/src/lib/libcrypto/bio/b_sock.c"
,144);
145 return (-1);
146 }
147 p = NULL((void *)0);
148 h = str;
149 if ((p = strrchr(str, ':')) == NULL((void *)0)) {
150 /* A string without a colon is treated as a port. */
151 p = str;
152 h = NULL((void *)0);
153 } else {
154 *p++ = '\0';
155 if (*p == '\0') {
156 BIOerror(BIO_R_NO_PORT_SPECIFIED)ERR_put_error(32,(0xfff),(114),"/usr/src/lib/libcrypto/bio/b_sock.c"
,156);
157 goto err;
158 }
159 if (*h == '\0' || strcmp(h, "*") == 0)
160 h = NULL((void *)0);
161 }
162
163 if ((error = getaddrinfo(h, p, &hints, &res)) != 0) {
164 BIOerror(BIO_R_BAD_HOSTNAME_LOOKUP)ERR_put_error(32,(0xfff),(102),"/usr/src/lib/libcrypto/bio/b_sock.c"
,164);
165 ERR_asprintf_error_data("getaddrinfo: '%s:%s': %s'", h, p,
166 gai_strerror(error));
167 goto err;
168 }
169 if (h == NULL((void *)0)) {
170 struct sockaddr_in *sin = (struct sockaddr_in *)res->ai_addr;
171 sin->sin_addr.s_addr = INADDR_ANY((u_int32_t)(0x00000000));
172 }
173
174 s = socket(AF_INET2, SOCK_STREAM1, IPPROTO_TCP6);
175 if (s == -1) {
176 SYSerror(errno)ERR_put_error(2,(0xfff),((*__errno())),"/usr/src/lib/libcrypto/bio/b_sock.c"
,176);
177 ERR_asprintf_error_data("host='%s'", host);
178 BIOerror(BIO_R_UNABLE_TO_CREATE_SOCKET)ERR_put_error(32,(0xfff),(118),"/usr/src/lib/libcrypto/bio/b_sock.c"
,178);
179 goto err;
180 }
181 if (bind_mode == BIO_BIND_REUSEADDR2) {
182 int i = 1;
183
184 ret = setsockopt(s, SOL_SOCKET0xffff, SO_REUSEADDR0x0004, &i, sizeof(i));
185 bind_mode = BIO_BIND_NORMAL0;
Value stored to 'bind_mode' is never read
186 }
187 if (bind(s, res->ai_addr, res->ai_addrlen) == -1) {
188 SYSerror(errno)ERR_put_error(2,(0xfff),((*__errno())),"/usr/src/lib/libcrypto/bio/b_sock.c"
,188);
189 ERR_asprintf_error_data("host='%s'", host);
190 BIOerror(BIO_R_UNABLE_TO_BIND_SOCKET)ERR_put_error(32,(0xfff),(117),"/usr/src/lib/libcrypto/bio/b_sock.c"
,190);
191 goto err;
192 }
193 if (listen(s, SOMAXCONN128) == -1) {
194 SYSerror(errno)ERR_put_error(2,(0xfff),((*__errno())),"/usr/src/lib/libcrypto/bio/b_sock.c"
,194);
195 ERR_asprintf_error_data("host='%s'", host);
196 BIOerror(BIO_R_UNABLE_TO_LISTEN_SOCKET)ERR_put_error(32,(0xfff),(119),"/usr/src/lib/libcrypto/bio/b_sock.c"
,196);
197 goto err;
198 }
199 ret = 1;
200
201err:
202 free(str);
203 if (res != NULL((void *)0))
204 freeaddrinfo(res);
205 if ((ret == 0) && (s != -1)) {
206 close(s);
207 s = -1;
208 }
209 return (s);
210}
211LCRYPTO_ALIAS(BIO_get_accept_socket)asm("");
212
213int
214BIO_accept(int sock, char **addr)
215{
216 char h[NI_MAXHOST256], s[NI_MAXSERV32];
217 struct sockaddr_in sin;
218 socklen_t sin_len = sizeof(sin);
219 int ret = -1;
220
221 if (addr == NULL((void *)0)) {
222 BIOerror(BIO_R_NULL_PARAMETER)ERR_put_error(32,(0xfff),(115),"/usr/src/lib/libcrypto/bio/b_sock.c"
,222);
223 goto end;
224 }
225 ret = accept(sock, (struct sockaddr *)&sin, &sin_len);
226 if (ret == -1) {
227 if (BIO_sock_should_retry(ret))
228 return -2;
229 SYSerror(errno)ERR_put_error(2,(0xfff),((*__errno())),"/usr/src/lib/libcrypto/bio/b_sock.c"
,229);
230 BIOerror(BIO_R_ACCEPT_ERROR)ERR_put_error(32,(0xfff),(100),"/usr/src/lib/libcrypto/bio/b_sock.c"
,230);
231 goto end;
232 }
233 /* XXX Crazy API. Can't be helped */
234 if (*addr != NULL((void *)0)) {
235 free(*addr);
236 *addr = NULL((void *)0);
237 }
238
239 if (sin.sin_family != AF_INET2)
240 goto end;
241
242 if (getnameinfo((struct sockaddr *)&sin, sin_len, h, sizeof(h),
243 s, sizeof(s), NI_NUMERICHOST1|NI_NUMERICSERV2) != 0)
244 goto end;
245
246 if ((asprintf(addr, "%s:%s", h, s)) == -1) {
247 BIOerror(ERR_R_MALLOC_FAILURE)ERR_put_error(32,(0xfff),((1|64)),"/usr/src/lib/libcrypto/bio/b_sock.c"
,247);
248 *addr = NULL((void *)0);
249 goto end;
250 }
251end:
252 return (ret);
253}
254LCRYPTO_ALIAS(BIO_accept)asm("");
255
256int
257BIO_set_tcp_ndelay(int s, int on)
258{
259 return (setsockopt(s, IPPROTO_TCP6, TCP_NODELAY0x01, &on, sizeof(on)) == 0);
260}
261LCRYPTO_ALIAS(BIO_set_tcp_ndelay)asm("");