TCP client cannot send read only data #16541
Description
Description
TCP client cannot send read only data
Steps to reproduce the issue
hardware:stm32f407ze
usemodule:stm32_eth
test ipv4 tcp client send const data like this "const char sendbuf[] = "Hello!";"
The test code is as follows：
`
const char sendbuf[] = "Hello!";
int test_tcp_client(void)
{
int res = 0;
sock_tcp_t sock;
sock_tcp_ep_t remote = SOCK_IPV4_EP_ANY;
remote.port = SERVER_PORT;//SERVER_PORT=12345
ipv4_addr_from_str((ipv4_addr_t *)&remote.addr, SERVER_IP_ADDR);//SERVER_IP_ADDR=192.168.12.89
xtimer_sleep(2);
if (sock_tcp_connect(&sock, &remote, 0, 0) < 0)
{
puts("Error connecting sock");
return 1;
}
puts("Sending \"Hello!\"");
if ((res = sock_tcp_write(&sock, sendbuf, sizeof(sendbuf))) < 0)
{
puts("Errored on write");
}
puts("send over...");
`
However, if the data sent is modified to "char sendbuf[] = "Hello!";", without "const",it will be sent successfully
Expected results
Actual results
Versions
Operating System Environment
Operating System: "Ubuntu" "18.04.5 LTS (Bionic Beaver)"
Kernel: Linux 5.4.0-73-generic x86_64 x86_64
System shell: /bin/dash (probably dash)
make's shell: /bin/dash (probably dash)
Installed compiler toolchains
native gcc: gcc (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0
arm-none-eabi-gcc: arm-none-eabi-gcc (GNU Tools for Arm Embedded Processors 7-2018-q2-update) 7.3.1 20180622 (release) [ARM/embedded-7-branch revision 261907]
avr-gcc: missing
mips-mti-elf-gcc: missing
msp430-elf-gcc: missing
riscv-none-elf-gcc: missing
riscv64-unknown-elf-gcc: missing
riscv-none-embed-gcc: missing
xtensa-esp32-elf-gcc: missing
xtensa-esp8266-elf-gcc: missing
clang: missing
Installed compiler libs
arm-none-eabi-newlib: "3.0.0"
mips-mti-elf-newlib: missing
msp430-elf-newlib: missing
riscv-none-elf-newlib: missing
riscv64-unknown-elf-newlib: missing
riscv-none-embed-newlib: missing
xtensa-esp32-elf-newlib: missing
xtensa-esp8266-elf-newlib: missing
avr-libc: missing (missing)
Installed development tools
ccache: missing
cmake: cmake version 3.10.2
cppcheck: missing
doxygen: 1.8.13
git: git version 2.17.1
make: GNU Make 4.1
openocd: missing
python: Python 2.7.17
python2: Python 2.7.17
python3: Python 3.6.9
flake8: error: /usr/bin/python3: No module named flake8
coccinelle: missing